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_start_queue(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_STA:
249 case IEEE80211_IF_TYPE_MNTR:
250 case IEEE80211_IF_TYPE_IBSS:
251 case IEEE80211_IF_TYPE_MESH_POINT:
252 /* no special treatment */
254 case IEEE80211_IF_TYPE_INVALID:
260 if (local->open_count == 0) {
262 if (local->ops->start)
263 res = local->ops->start(local_to_hw(local));
266 need_hw_reconfig = 1;
267 ieee80211_led_radio(local, local->hw.conf.radio_enabled);
270 switch (sdata->vif.type) {
271 case IEEE80211_IF_TYPE_VLAN:
272 /* no need to tell driver */
274 case IEEE80211_IF_TYPE_MNTR:
275 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
276 local->cooked_mntrs++;
280 /* must be before the call to ieee80211_configure_filter */
282 if (local->monitors == 1)
283 local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP;
285 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
286 local->fif_fcsfail++;
287 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
288 local->fif_plcpfail++;
289 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
290 local->fif_control++;
291 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
292 local->fif_other_bss++;
294 netif_tx_lock_bh(local->mdev);
295 ieee80211_configure_filter(local);
296 netif_tx_unlock_bh(local->mdev);
298 case IEEE80211_IF_TYPE_STA:
299 case IEEE80211_IF_TYPE_IBSS:
300 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
303 conf.vif = &sdata->vif;
304 conf.type = sdata->vif.type;
305 conf.mac_addr = dev->dev_addr;
306 res = local->ops->add_interface(local_to_hw(local), &conf);
310 ieee80211_if_config(dev);
311 changed |= ieee80211_reset_erp_info(dev);
312 ieee80211_bss_info_change_notify(sdata, changed);
313 ieee80211_enable_keys(sdata);
315 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
316 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
317 netif_carrier_off(dev);
319 netif_carrier_on(dev);
322 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
323 /* Create STA entry for the WDS peer */
324 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
328 goto err_del_interface;
331 /* no locking required since STA is not live yet */
332 sta->flags |= WLAN_STA_AUTHORIZED;
334 res = sta_info_insert(sta);
336 /* STA has been freed */
337 goto err_del_interface;
341 if (local->open_count == 0) {
342 res = dev_open(local->mdev);
345 goto err_del_interface;
346 tasklet_enable(&local->tx_pending_tasklet);
347 tasklet_enable(&local->tasklet);
351 * set_multicast_list will be invoked by the networking core
352 * which will check whether any increments here were done in
353 * error and sync them down to the hardware as filter flags.
355 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
356 atomic_inc(&local->iff_allmultis);
358 if (sdata->flags & IEEE80211_SDATA_PROMISC)
359 atomic_inc(&local->iff_promiscs);
362 if (need_hw_reconfig)
363 ieee80211_hw_config(local);
366 * ieee80211_sta_work is disabled while network interface
367 * is down. Therefore, some configuration changes may not
368 * yet be effective. Trigger execution of ieee80211_sta_work
371 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
372 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
373 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
374 queue_work(local->hw.workqueue, &ifsta->work);
377 netif_start_queue(dev);
381 local->ops->remove_interface(local_to_hw(local), &conf);
383 if (!local->open_count && local->ops->stop)
384 local->ops->stop(local_to_hw(local));
387 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
388 list_del(&sdata->u.vlan.list);
392 static int ieee80211_stop(struct net_device *dev)
394 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
395 struct ieee80211_local *local = sdata->local;
396 struct ieee80211_if_init_conf conf;
397 struct sta_info *sta;
400 * Stop TX on this interface first.
402 netif_stop_queue(dev);
405 * Now delete all active aggregation sessions.
409 list_for_each_entry_rcu(sta, &local->sta_list, list) {
410 if (sta->sdata == sdata)
411 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
417 * Remove all stations associated with this interface.
419 * This must be done before calling ops->remove_interface()
420 * because otherwise we can later invoke ops->sta_notify()
421 * whenever the STAs are removed, and that invalidates driver
422 * assumptions about always getting a vif pointer that is valid
423 * (because if we remove a STA after ops->remove_interface()
424 * the driver will have removed the vif info already!)
426 * We could relax this and only unlink the stations from the
427 * hash table and list but keep them on a per-sdata list that
428 * will be inserted back again when the interface is brought
429 * up again, but I don't currently see a use case for that,
430 * except with WDS which gets a STA entry created when it is
433 sta_info_flush(local, sdata);
436 * Don't count this interface for promisc/allmulti while it
437 * is down. dev_mc_unsync() will invoke set_multicast_list
438 * on the master interface which will sync these down to the
439 * hardware as filter flags.
441 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
442 atomic_dec(&local->iff_allmultis);
444 if (sdata->flags & IEEE80211_SDATA_PROMISC)
445 atomic_dec(&local->iff_promiscs);
447 dev_mc_unsync(local->mdev, dev);
449 /* APs need special treatment */
450 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
451 struct ieee80211_sub_if_data *vlan, *tmp;
452 struct beacon_data *old_beacon = sdata->u.ap.beacon;
455 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
459 /* down all dependent devices, that is VLANs */
460 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
462 dev_close(vlan->dev);
463 WARN_ON(!list_empty(&sdata->u.ap.vlans));
468 switch (sdata->vif.type) {
469 case IEEE80211_IF_TYPE_VLAN:
470 list_del(&sdata->u.vlan.list);
471 /* no need to tell driver */
473 case IEEE80211_IF_TYPE_MNTR:
474 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
475 local->cooked_mntrs--;
480 if (local->monitors == 0)
481 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
483 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
484 local->fif_fcsfail--;
485 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
486 local->fif_plcpfail--;
487 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
488 local->fif_control--;
489 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
490 local->fif_other_bss--;
492 netif_tx_lock_bh(local->mdev);
493 ieee80211_configure_filter(local);
494 netif_tx_unlock_bh(local->mdev);
496 case IEEE80211_IF_TYPE_MESH_POINT:
497 case IEEE80211_IF_TYPE_STA:
498 case IEEE80211_IF_TYPE_IBSS:
499 sdata->u.sta.state = IEEE80211_DISABLED;
500 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
501 del_timer_sync(&sdata->u.sta.timer);
503 * When we get here, the interface is marked down.
504 * Call synchronize_rcu() to wait for the RX path
505 * should it be using the interface and enqueuing
506 * frames at this very time on another CPU.
509 skb_queue_purge(&sdata->u.sta.skb_queue);
511 if (local->scan_dev == sdata->dev) {
512 if (!local->ops->hw_scan) {
513 local->sta_sw_scanning = 0;
514 cancel_delayed_work(&local->scan_work);
516 local->sta_hw_scanning = 0;
519 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
520 kfree(sdata->u.sta.extra_ie);
521 sdata->u.sta.extra_ie = NULL;
522 sdata->u.sta.extra_ie_len = 0;
525 conf.vif = &sdata->vif;
526 conf.type = sdata->vif.type;
527 conf.mac_addr = dev->dev_addr;
528 /* disable all keys for as long as this netdev is down */
529 ieee80211_disable_keys(sdata);
530 local->ops->remove_interface(local_to_hw(local), &conf);
535 if (local->open_count == 0) {
536 if (netif_running(local->mdev))
537 dev_close(local->mdev);
539 if (local->ops->stop)
540 local->ops->stop(local_to_hw(local));
542 ieee80211_led_radio(local, 0);
544 flush_workqueue(local->hw.workqueue);
546 tasklet_disable(&local->tx_pending_tasklet);
547 tasklet_disable(&local->tasklet);
553 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
555 struct ieee80211_local *local = hw_to_local(hw);
556 struct netdev_queue *txq;
557 struct sta_info *sta;
558 struct ieee80211_sub_if_data *sdata;
559 u16 start_seq_num = 0;
562 DECLARE_MAC_BUF(mac);
564 if (tid >= STA_TID_NUM)
567 #ifdef CONFIG_MAC80211_HT_DEBUG
568 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
569 print_mac(mac, ra), tid);
570 #endif /* CONFIG_MAC80211_HT_DEBUG */
574 sta = sta_info_get(local, ra);
576 #ifdef CONFIG_MAC80211_HT_DEBUG
577 printk(KERN_DEBUG "Could not find the station\n");
583 spin_lock_bh(&sta->lock);
585 /* we have tried too many times, receiver does not want A-MPDU */
586 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
591 state = &sta->ampdu_mlme.tid_state_tx[tid];
592 /* check if the TID is not in aggregation flow already */
593 if (*state != HT_AGG_STATE_IDLE) {
594 #ifdef CONFIG_MAC80211_HT_DEBUG
595 printk(KERN_DEBUG "BA request denied - session is not "
596 "idle on tid %u\n", tid);
597 #endif /* CONFIG_MAC80211_HT_DEBUG */
602 /* prepare A-MPDU MLME for Tx aggregation */
603 sta->ampdu_mlme.tid_tx[tid] =
604 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
605 if (!sta->ampdu_mlme.tid_tx[tid]) {
606 #ifdef CONFIG_MAC80211_HT_DEBUG
608 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
615 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
616 sta_addba_resp_timer_expired;
617 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
618 (unsigned long)&sta->timer_to_tid[tid];
619 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
621 /* ensure that TX flow won't interrupt us
622 * until the end of the call to requeue function */
623 txq = &local->mdev->tx_queue;
624 spin_lock_bh(&txq->lock);
626 /* create a new queue for this aggregation */
627 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
629 /* case no queue is available to aggregation
630 * don't switch to aggregation */
632 #ifdef CONFIG_MAC80211_HT_DEBUG
633 printk(KERN_DEBUG "BA request denied - queue unavailable for"
635 #endif /* CONFIG_MAC80211_HT_DEBUG */
636 goto err_unlock_queue;
640 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
641 * call back right away, it must see that the flow has begun */
642 *state |= HT_ADDBA_REQUESTED_MSK;
644 if (local->ops->ampdu_action)
645 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
646 ra, tid, &start_seq_num);
649 /* No need to requeue the packets in the agg queue, since we
650 * held the tx lock: no packet could be enqueued to the newly
652 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
653 #ifdef CONFIG_MAC80211_HT_DEBUG
654 printk(KERN_DEBUG "BA request denied - HW unavailable for"
656 #endif /* CONFIG_MAC80211_HT_DEBUG */
657 *state = HT_AGG_STATE_IDLE;
658 goto err_unlock_queue;
661 /* Will put all the packets in the new SW queue */
662 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
663 spin_unlock_bh(&txq->lock);
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;
689 spin_unlock_bh(&txq->lock);
692 spin_unlock_bh(&sta->lock);
697 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
699 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
701 enum ieee80211_back_parties initiator)
703 struct ieee80211_local *local = hw_to_local(hw);
704 struct sta_info *sta;
707 DECLARE_MAC_BUF(mac);
709 if (tid >= STA_TID_NUM)
713 sta = sta_info_get(local, ra);
719 /* check if the TID is in aggregation */
720 state = &sta->ampdu_mlme.tid_state_tx[tid];
721 spin_lock_bh(&sta->lock);
723 if (*state != HT_AGG_STATE_OPERATIONAL) {
728 #ifdef CONFIG_MAC80211_HT_DEBUG
729 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
730 print_mac(mac, ra), tid);
731 #endif /* CONFIG_MAC80211_HT_DEBUG */
733 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
735 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
736 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
738 if (local->ops->ampdu_action)
739 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
742 /* case HW denied going back to legacy */
744 WARN_ON(ret != -EBUSY);
745 *state = HT_AGG_STATE_OPERATIONAL;
746 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
751 spin_unlock_bh(&sta->lock);
755 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
757 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
759 struct ieee80211_local *local = hw_to_local(hw);
760 struct sta_info *sta;
762 DECLARE_MAC_BUF(mac);
764 if (tid >= STA_TID_NUM) {
765 #ifdef CONFIG_MAC80211_HT_DEBUG
766 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
773 sta = sta_info_get(local, ra);
776 #ifdef CONFIG_MAC80211_HT_DEBUG
777 printk(KERN_DEBUG "Could not find station: %s\n",
783 state = &sta->ampdu_mlme.tid_state_tx[tid];
784 spin_lock_bh(&sta->lock);
786 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
787 #ifdef CONFIG_MAC80211_HT_DEBUG
788 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
791 spin_unlock_bh(&sta->lock);
796 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
798 *state |= HT_ADDBA_DRV_READY_MSK;
800 if (*state == HT_AGG_STATE_OPERATIONAL) {
801 #ifdef CONFIG_MAC80211_HT_DEBUG
802 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
804 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
806 spin_unlock_bh(&sta->lock);
809 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
811 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
813 struct ieee80211_local *local = hw_to_local(hw);
814 struct netdev_queue *txq;
815 struct sta_info *sta;
818 DECLARE_MAC_BUF(mac);
820 if (tid >= STA_TID_NUM) {
821 #ifdef CONFIG_MAC80211_HT_DEBUG
822 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
828 #ifdef CONFIG_MAC80211_HT_DEBUG
829 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
830 print_mac(mac, ra), tid);
831 #endif /* CONFIG_MAC80211_HT_DEBUG */
834 sta = sta_info_get(local, ra);
836 #ifdef CONFIG_MAC80211_HT_DEBUG
837 printk(KERN_DEBUG "Could not find station: %s\n",
843 state = &sta->ampdu_mlme.tid_state_tx[tid];
845 /* NOTE: no need to use sta->lock in this state check, as
846 * ieee80211_stop_tx_ba_session will let only
847 * one stop call to pass through per sta/tid */
848 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
849 #ifdef CONFIG_MAC80211_HT_DEBUG
850 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
856 if (*state & HT_AGG_STATE_INITIATOR_MSK)
857 ieee80211_send_delba(sta->sdata->dev, ra, tid,
858 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
860 agg_queue = sta->tid_to_tx_q[tid];
862 /* avoid ordering issues: we are the only one that can modify
863 * the content of the qdiscs */
864 txq = &local->mdev->tx_queue;
865 spin_lock_bh(&txq->lock);
866 /* remove the queue for this aggregation */
867 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
868 spin_unlock_bh(&txq->lock);
870 /* we just requeued the all the frames that were in the removed
871 * queue, and since we might miss a softirq we do netif_schedule_queue.
872 * ieee80211_wake_queue is not used here as this queue is not
873 * necessarily stopped */
874 netif_schedule_queue(txq);
875 spin_lock_bh(&sta->lock);
876 *state = HT_AGG_STATE_IDLE;
877 sta->ampdu_mlme.addba_req_num[tid] = 0;
878 kfree(sta->ampdu_mlme.tid_tx[tid]);
879 sta->ampdu_mlme.tid_tx[tid] = NULL;
880 spin_unlock_bh(&sta->lock);
884 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
886 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
887 const u8 *ra, u16 tid)
889 struct ieee80211_local *local = hw_to_local(hw);
890 struct ieee80211_ra_tid *ra_tid;
891 struct sk_buff *skb = dev_alloc_skb(0);
893 if (unlikely(!skb)) {
894 #ifdef CONFIG_MAC80211_HT_DEBUG
896 printk(KERN_WARNING "%s: Not enough memory, "
897 "dropping start BA session", skb->dev->name);
901 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
902 memcpy(&ra_tid->ra, ra, ETH_ALEN);
905 skb->pkt_type = IEEE80211_ADDBA_MSG;
906 skb_queue_tail(&local->skb_queue, skb);
907 tasklet_schedule(&local->tasklet);
909 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
911 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
912 const u8 *ra, u16 tid)
914 struct ieee80211_local *local = hw_to_local(hw);
915 struct ieee80211_ra_tid *ra_tid;
916 struct sk_buff *skb = dev_alloc_skb(0);
918 if (unlikely(!skb)) {
919 #ifdef CONFIG_MAC80211_HT_DEBUG
921 printk(KERN_WARNING "%s: Not enough memory, "
922 "dropping stop BA session", skb->dev->name);
926 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
927 memcpy(&ra_tid->ra, ra, ETH_ALEN);
930 skb->pkt_type = IEEE80211_DELBA_MSG;
931 skb_queue_tail(&local->skb_queue, skb);
932 tasklet_schedule(&local->tasklet);
934 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
936 static void ieee80211_set_multicast_list(struct net_device *dev)
938 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
939 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
940 int allmulti, promisc, sdata_allmulti, sdata_promisc;
942 allmulti = !!(dev->flags & IFF_ALLMULTI);
943 promisc = !!(dev->flags & IFF_PROMISC);
944 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
945 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
947 if (allmulti != sdata_allmulti) {
948 if (dev->flags & IFF_ALLMULTI)
949 atomic_inc(&local->iff_allmultis);
951 atomic_dec(&local->iff_allmultis);
952 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
955 if (promisc != sdata_promisc) {
956 if (dev->flags & IFF_PROMISC)
957 atomic_inc(&local->iff_promiscs);
959 atomic_dec(&local->iff_promiscs);
960 sdata->flags ^= IEEE80211_SDATA_PROMISC;
963 dev_mc_sync(local->mdev, dev);
966 static const struct header_ops ieee80211_header_ops = {
967 .create = eth_header,
968 .parse = header_parse_80211,
969 .rebuild = eth_rebuild_header,
970 .cache = eth_header_cache,
971 .cache_update = eth_header_cache_update,
974 /* Must not be called for mdev */
975 void ieee80211_if_setup(struct net_device *dev)
978 dev->hard_start_xmit = ieee80211_subif_start_xmit;
979 dev->wireless_handlers = &ieee80211_iw_handler_def;
980 dev->set_multicast_list = ieee80211_set_multicast_list;
981 dev->change_mtu = ieee80211_change_mtu;
982 dev->open = ieee80211_open;
983 dev->stop = ieee80211_stop;
984 dev->destructor = ieee80211_if_free;
987 /* everything else */
989 static int __ieee80211_if_config(struct net_device *dev,
990 struct sk_buff *beacon)
992 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
993 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
994 struct ieee80211_if_conf conf;
996 if (!local->ops->config_interface || !netif_running(dev))
999 memset(&conf, 0, sizeof(conf));
1000 conf.type = sdata->vif.type;
1001 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1002 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1003 conf.bssid = sdata->u.sta.bssid;
1004 conf.ssid = sdata->u.sta.ssid;
1005 conf.ssid_len = sdata->u.sta.ssid_len;
1006 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1007 conf.beacon = beacon;
1008 ieee80211_start_mesh(dev);
1009 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1010 conf.ssid = sdata->u.ap.ssid;
1011 conf.ssid_len = sdata->u.ap.ssid_len;
1012 conf.beacon = beacon;
1014 return local->ops->config_interface(local_to_hw(local),
1015 &sdata->vif, &conf);
1018 int ieee80211_if_config(struct net_device *dev)
1020 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1021 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1022 if (sdata->vif.type == IEEE80211_IF_TYPE_MESH_POINT &&
1023 (local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1024 return ieee80211_if_config_beacon(dev);
1025 return __ieee80211_if_config(dev, NULL);
1028 int ieee80211_if_config_beacon(struct net_device *dev)
1030 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
1031 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1032 struct sk_buff *skb;
1034 if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE))
1036 skb = ieee80211_beacon_get(local_to_hw(local), &sdata->vif);
1039 return __ieee80211_if_config(dev, skb);
1042 int ieee80211_hw_config(struct ieee80211_local *local)
1044 struct ieee80211_channel *chan;
1047 if (local->sta_sw_scanning)
1048 chan = local->scan_channel;
1050 chan = local->oper_channel;
1052 local->hw.conf.channel = chan;
1054 if (!local->hw.conf.power_level)
1055 local->hw.conf.power_level = chan->max_power;
1057 local->hw.conf.power_level = min(chan->max_power,
1058 local->hw.conf.power_level);
1060 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1062 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1063 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1064 wiphy_name(local->hw.wiphy), chan->center_freq);
1067 if (local->open_count)
1068 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1074 * ieee80211_handle_ht should be used only after legacy configuration
1075 * has been determined namely band, as ht configuration depends upon
1076 * the hardware's HT abilities for a _specific_ band.
1078 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1079 struct ieee80211_ht_info *req_ht_cap,
1080 struct ieee80211_ht_bss_info *req_bss_cap)
1082 struct ieee80211_conf *conf = &local->hw.conf;
1083 struct ieee80211_supported_band *sband;
1084 struct ieee80211_ht_info ht_conf;
1085 struct ieee80211_ht_bss_info ht_bss_conf;
1088 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1091 sband = local->hw.wiphy->bands[conf->channel->band];
1093 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1094 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1096 /* HT is not supported */
1097 if (!sband->ht_info.ht_supported) {
1098 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1104 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1105 changed |= BSS_CHANGED_HT;
1106 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1107 conf->ht_conf.ht_supported = 0;
1112 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1113 changed |= BSS_CHANGED_HT;
1115 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1116 ht_conf.ht_supported = 1;
1118 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1119 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1120 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1121 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1122 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1123 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1125 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1126 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1129 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1131 /* configure suppoerted Tx MCS according to requested MCS
1132 * (based in most cases on Rx capabilities of peer) and self
1133 * Tx MCS capabilities (as defined by low level driver HW
1134 * Tx capabilities) */
1135 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1138 /* Counting from 0 therfore + 1 */
1139 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1140 max_tx_streams = ((tx_mcs_set_cap &
1141 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1143 for (i = 0; i < max_tx_streams; i++)
1144 ht_conf.supp_mcs_set[i] =
1145 sband->ht_info.supp_mcs_set[i] &
1146 req_ht_cap->supp_mcs_set[i];
1148 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1149 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1150 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1151 ht_conf.supp_mcs_set[i] =
1152 sband->ht_info.supp_mcs_set[i] &
1153 req_ht_cap->supp_mcs_set[i];
1156 /* if bss configuration changed store the new one */
1157 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1158 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1159 changed |= BSS_CHANGED_HT;
1160 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1161 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1167 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1170 struct ieee80211_local *local = sdata->local;
1175 if (local->ops->bss_info_changed)
1176 local->ops->bss_info_changed(local_to_hw(local),
1182 u32 ieee80211_reset_erp_info(struct net_device *dev)
1184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1186 sdata->bss_conf.use_cts_prot = 0;
1187 sdata->bss_conf.use_short_preamble = 0;
1188 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1191 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1192 struct sk_buff *skb)
1194 struct ieee80211_local *local = hw_to_local(hw);
1195 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1198 skb->dev = local->mdev;
1199 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1200 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1201 &local->skb_queue : &local->skb_queue_unreliable, skb);
1202 tmp = skb_queue_len(&local->skb_queue) +
1203 skb_queue_len(&local->skb_queue_unreliable);
1204 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1205 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1206 dev_kfree_skb_irq(skb);
1208 I802_DEBUG_INC(local->tx_status_drop);
1210 tasklet_schedule(&local->tasklet);
1212 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1214 static void ieee80211_tasklet_handler(unsigned long data)
1216 struct ieee80211_local *local = (struct ieee80211_local *) data;
1217 struct sk_buff *skb;
1218 struct ieee80211_rx_status rx_status;
1219 struct ieee80211_ra_tid *ra_tid;
1221 while ((skb = skb_dequeue(&local->skb_queue)) ||
1222 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1223 switch (skb->pkt_type) {
1224 case IEEE80211_RX_MSG:
1225 /* status is in skb->cb */
1226 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1227 /* Clear skb->pkt_type in order to not confuse kernel
1230 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1232 case IEEE80211_TX_STATUS_MSG:
1234 ieee80211_tx_status(local_to_hw(local), skb);
1236 case IEEE80211_DELBA_MSG:
1237 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1238 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1239 ra_tid->ra, ra_tid->tid);
1242 case IEEE80211_ADDBA_MSG:
1243 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1244 ieee80211_start_tx_ba_cb(local_to_hw(local),
1245 ra_tid->ra, ra_tid->tid);
1256 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1257 * make a prepared TX frame (one that has been given to hw) to look like brand
1258 * new IEEE 802.11 frame that is ready to go through TX processing again.
1259 * Also, tx_packet_data in cb is restored from tx_control. */
1260 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1261 struct ieee80211_key *key,
1262 struct sk_buff *skb)
1264 int hdrlen, iv_len, mic_len;
1265 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1267 info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS |
1268 IEEE80211_TX_CTL_DO_NOT_ENCRYPT |
1269 IEEE80211_TX_CTL_REQUEUE |
1270 IEEE80211_TX_CTL_EAPOL_FRAME;
1272 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1277 switch (key->conf.alg) {
1279 iv_len = WEP_IV_LEN;
1280 mic_len = WEP_ICV_LEN;
1283 iv_len = TKIP_IV_LEN;
1284 mic_len = TKIP_ICV_LEN;
1287 iv_len = CCMP_HDR_LEN;
1288 mic_len = CCMP_MIC_LEN;
1294 if (skb->len >= mic_len &&
1295 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1296 skb_trim(skb, skb->len - mic_len);
1297 if (skb->len >= iv_len && skb->len > hdrlen) {
1298 memmove(skb->data + iv_len, skb->data, hdrlen);
1299 skb_pull(skb, iv_len);
1304 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1305 u16 fc = le16_to_cpu(hdr->frame_control);
1306 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1307 fc &= ~IEEE80211_STYPE_QOS_DATA;
1308 hdr->frame_control = cpu_to_le16(fc);
1309 memmove(skb->data + 2, skb->data, hdrlen - 2);
1315 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1316 struct sta_info *sta,
1317 struct sk_buff *skb)
1319 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1321 sta->tx_filtered_count++;
1324 * Clear the TX filter mask for this STA when sending the next
1325 * packet. If the STA went to power save mode, this will happen
1326 * when it wakes up for the next time.
1328 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1331 * This code races in the following way:
1333 * (1) STA sends frame indicating it will go to sleep and does so
1334 * (2) hardware/firmware adds STA to filter list, passes frame up
1335 * (3) hardware/firmware processes TX fifo and suppresses a frame
1336 * (4) we get TX status before having processed the frame and
1337 * knowing that the STA has gone to sleep.
1339 * This is actually quite unlikely even when both those events are
1340 * processed from interrupts coming in quickly after one another or
1341 * even at the same time because we queue both TX status events and
1342 * RX frames to be processed by a tasklet and process them in the
1343 * same order that they were received or TX status last. Hence, there
1344 * is no race as long as the frame RX is processed before the next TX
1345 * status, which drivers can ensure, see below.
1347 * Note that this can only happen if the hardware or firmware can
1348 * actually add STAs to the filter list, if this is done by the
1349 * driver in response to set_tim() (which will only reduce the race
1350 * this whole filtering tries to solve, not completely solve it)
1351 * this situation cannot happen.
1353 * To completely solve this race drivers need to make sure that they
1354 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1356 * (b) always process RX events before TX status events if ordering
1357 * can be unknown, for example with different interrupt status
1360 if (test_sta_flags(sta, WLAN_STA_PS) &&
1361 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1362 ieee80211_remove_tx_extra(local, sta->key, skb);
1363 skb_queue_tail(&sta->tx_filtered, skb);
1367 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1368 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1369 /* Software retry the packet once */
1370 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1371 ieee80211_remove_tx_extra(local, sta->key, skb);
1372 dev_queue_xmit(skb);
1376 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1377 if (net_ratelimit())
1378 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1379 "queue_len=%d PS=%d @%lu\n",
1380 wiphy_name(local->hw.wiphy),
1381 skb_queue_len(&sta->tx_filtered),
1382 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1387 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1389 struct sk_buff *skb2;
1390 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1391 struct ieee80211_local *local = hw_to_local(hw);
1392 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1395 struct ieee80211_tx_status_rtap_hdr *rthdr;
1396 struct ieee80211_sub_if_data *sdata;
1397 struct net_device *prev_dev = NULL;
1398 struct sta_info *sta;
1402 if (info->status.excessive_retries) {
1403 sta = sta_info_get(local, hdr->addr1);
1405 if (test_sta_flags(sta, WLAN_STA_PS)) {
1407 * The STA is in power save mode, so assume
1408 * that this TX packet failed because of that.
1410 ieee80211_handle_filtered_frame(local, sta, skb);
1417 fc = hdr->frame_control;
1419 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1420 (ieee80211_is_data_qos(fc))) {
1423 sta = sta_info_get(local, hdr->addr1);
1425 qc = ieee80211_get_qos_ctl(hdr);
1427 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1428 & IEEE80211_SCTL_SEQ);
1429 ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1434 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1435 sta = sta_info_get(local, hdr->addr1);
1437 ieee80211_handle_filtered_frame(local, sta, skb);
1442 rate_control_tx_status(local->mdev, skb);
1446 ieee80211_led_tx(local, 0);
1449 * Fragments are passed to low-level drivers as separate skbs, so these
1450 * are actually fragments, not frames. Update frame counters only for
1451 * the first fragment of the frame. */
1453 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1454 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1456 if (info->flags & IEEE80211_TX_STAT_ACK) {
1458 local->dot11TransmittedFrameCount++;
1459 if (is_multicast_ether_addr(hdr->addr1))
1460 local->dot11MulticastTransmittedFrameCount++;
1461 if (info->status.retry_count > 0)
1462 local->dot11RetryCount++;
1463 if (info->status.retry_count > 1)
1464 local->dot11MultipleRetryCount++;
1467 /* This counter shall be incremented for an acknowledged MPDU
1468 * with an individual address in the address 1 field or an MPDU
1469 * with a multicast address in the address 1 field of type Data
1471 if (!is_multicast_ether_addr(hdr->addr1) ||
1472 type == IEEE80211_FTYPE_DATA ||
1473 type == IEEE80211_FTYPE_MGMT)
1474 local->dot11TransmittedFragmentCount++;
1477 local->dot11FailedCount++;
1480 /* this was a transmitted frame, but now we want to reuse it */
1484 * This is a bit racy but we can avoid a lot of work
1487 if (!local->monitors && !local->cooked_mntrs) {
1492 /* send frame to monitor interfaces now */
1494 if (skb_headroom(skb) < sizeof(*rthdr)) {
1495 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1500 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1501 skb_push(skb, sizeof(*rthdr));
1503 memset(rthdr, 0, sizeof(*rthdr));
1504 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1505 rthdr->hdr.it_present =
1506 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1507 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1509 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1510 !is_multicast_ether_addr(hdr->addr1))
1511 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1513 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1514 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1515 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1516 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1517 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1519 rthdr->data_retries = info->status.retry_count;
1521 /* XXX: is this sufficient for BPF? */
1522 skb_set_mac_header(skb, 0);
1523 skb->ip_summed = CHECKSUM_UNNECESSARY;
1524 skb->pkt_type = PACKET_OTHERHOST;
1525 skb->protocol = htons(ETH_P_802_2);
1526 memset(skb->cb, 0, sizeof(skb->cb));
1529 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1530 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1531 if (!netif_running(sdata->dev))
1535 skb2 = skb_clone(skb, GFP_ATOMIC);
1537 skb2->dev = prev_dev;
1542 prev_dev = sdata->dev;
1546 skb->dev = prev_dev;
1553 EXPORT_SYMBOL(ieee80211_tx_status);
1555 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1556 const struct ieee80211_ops *ops)
1558 struct ieee80211_local *local;
1560 struct wiphy *wiphy;
1562 /* Ensure 32-byte alignment of our private data and hw private data.
1563 * We use the wiphy priv data for both our ieee80211_local and for
1564 * the driver's private data
1566 * In memory it'll be like this:
1568 * +-------------------------+
1570 * +-------------------------+
1571 * | struct ieee80211_local |
1572 * +-------------------------+
1573 * | driver's private data |
1574 * +-------------------------+
1577 priv_size = ((sizeof(struct ieee80211_local) +
1578 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1581 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1586 wiphy->privid = mac80211_wiphy_privid;
1588 local = wiphy_priv(wiphy);
1589 local->hw.wiphy = wiphy;
1591 local->hw.priv = (char *)local +
1592 ((sizeof(struct ieee80211_local) +
1593 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1596 BUG_ON(!ops->start);
1598 BUG_ON(!ops->config);
1599 BUG_ON(!ops->add_interface);
1600 BUG_ON(!ops->remove_interface);
1601 BUG_ON(!ops->configure_filter);
1604 local->hw.queues = 1; /* default */
1606 local->bridge_packets = 1;
1608 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1609 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1610 local->short_retry_limit = 7;
1611 local->long_retry_limit = 4;
1612 local->hw.conf.radio_enabled = 1;
1614 INIT_LIST_HEAD(&local->interfaces);
1616 spin_lock_init(&local->key_lock);
1618 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1620 sta_info_init(local);
1622 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1623 (unsigned long)local);
1624 tasklet_disable(&local->tx_pending_tasklet);
1626 tasklet_init(&local->tasklet,
1627 ieee80211_tasklet_handler,
1628 (unsigned long) local);
1629 tasklet_disable(&local->tasklet);
1631 skb_queue_head_init(&local->skb_queue);
1632 skb_queue_head_init(&local->skb_queue_unreliable);
1634 return local_to_hw(local);
1636 EXPORT_SYMBOL(ieee80211_alloc_hw);
1638 int ieee80211_register_hw(struct ieee80211_hw *hw)
1640 struct ieee80211_local *local = hw_to_local(hw);
1643 enum ieee80211_band band;
1644 struct net_device *mdev;
1645 struct wireless_dev *mwdev;
1648 * generic code guarantees at least one band,
1649 * set this very early because much code assumes
1650 * that hw.conf.channel is assigned
1652 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1653 struct ieee80211_supported_band *sband;
1655 sband = local->hw.wiphy->bands[band];
1657 /* init channel we're on */
1658 local->hw.conf.channel =
1659 local->oper_channel =
1660 local->scan_channel = &sband->channels[0];
1665 result = wiphy_register(local->hw.wiphy);
1670 * We use the number of queues for feature tests (QoS, HT) internally
1671 * so restrict them appropriately.
1673 #ifdef CONFIG_MAC80211_QOS
1674 if (hw->queues > IEEE80211_MAX_QUEUES)
1675 hw->queues = IEEE80211_MAX_QUEUES;
1676 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1677 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1679 hw->ampdu_queues = 0;
1682 hw->ampdu_queues = 0;
1685 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1686 "wmaster%d", ether_setup,
1687 ieee80211_num_queues(hw));
1689 goto fail_mdev_alloc;
1691 if (ieee80211_num_queues(hw) > 1)
1692 mdev->features |= NETIF_F_MULTI_QUEUE;
1694 mwdev = netdev_priv(mdev);
1695 mdev->ieee80211_ptr = mwdev;
1696 mwdev->wiphy = local->hw.wiphy;
1700 ieee80211_rx_bss_list_init(local);
1702 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1703 mdev->open = ieee80211_master_open;
1704 mdev->stop = ieee80211_master_stop;
1705 mdev->type = ARPHRD_IEEE80211;
1706 mdev->header_ops = &ieee80211_header_ops;
1707 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1709 name = wiphy_dev(local->hw.wiphy)->driver->name;
1710 local->hw.workqueue = create_freezeable_workqueue(name);
1711 if (!local->hw.workqueue) {
1713 goto fail_workqueue;
1717 * The hardware needs headroom for sending the frame,
1718 * and we need some headroom for passing the frame to monitor
1719 * interfaces, but never both at the same time.
1721 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1722 sizeof(struct ieee80211_tx_status_rtap_hdr));
1724 debugfs_hw_add(local);
1726 if (local->hw.conf.beacon_int < 10)
1727 local->hw.conf.beacon_int = 100;
1729 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1730 IEEE80211_HW_SIGNAL_DB |
1731 IEEE80211_HW_SIGNAL_DBM) ?
1732 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1733 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1734 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1735 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1736 local->wstats_flags |= IW_QUAL_DBM;
1738 result = sta_info_start(local);
1743 result = dev_alloc_name(local->mdev, local->mdev->name);
1747 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1748 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1750 result = register_netdevice(local->mdev);
1754 result = ieee80211_init_rate_ctrl_alg(local,
1755 hw->rate_control_algorithm);
1757 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1758 "algorithm\n", wiphy_name(local->hw.wiphy));
1762 result = ieee80211_wep_init(local);
1765 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1766 wiphy_name(local->hw.wiphy));
1770 ieee80211_install_qdisc(local->mdev);
1772 /* add one default STA interface */
1773 result = ieee80211_if_add(local, "wlan%d", NULL,
1774 IEEE80211_IF_TYPE_STA, NULL);
1776 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1777 wiphy_name(local->hw.wiphy));
1779 local->reg_state = IEEE80211_DEV_REGISTERED;
1782 ieee80211_led_init(local);
1787 rate_control_deinitialize(local);
1789 unregister_netdevice(local->mdev);
1793 sta_info_stop(local);
1795 debugfs_hw_del(local);
1796 destroy_workqueue(local->hw.workqueue);
1799 free_netdev(local->mdev);
1801 wiphy_unregister(local->hw.wiphy);
1804 EXPORT_SYMBOL(ieee80211_register_hw);
1806 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1808 struct ieee80211_local *local = hw_to_local(hw);
1809 struct ieee80211_sub_if_data *sdata, *tmp;
1811 tasklet_kill(&local->tx_pending_tasklet);
1812 tasklet_kill(&local->tasklet);
1816 BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED);
1818 local->reg_state = IEEE80211_DEV_UNREGISTERED;
1821 * At this point, interface list manipulations are fine
1822 * because the driver cannot be handing us frames any
1823 * more and the tasklet is killed.
1827 * First, we remove all virtual interfaces.
1829 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1830 list_del(&sdata->list);
1831 __ieee80211_if_del(local, sdata);
1834 /* then, finally, remove the master interface */
1835 unregister_netdevice(local->mdev);
1839 ieee80211_rx_bss_list_deinit(local);
1840 ieee80211_clear_tx_pending(local);
1841 sta_info_stop(local);
1842 rate_control_deinitialize(local);
1843 debugfs_hw_del(local);
1845 if (skb_queue_len(&local->skb_queue)
1846 || skb_queue_len(&local->skb_queue_unreliable))
1847 printk(KERN_WARNING "%s: skb_queue not empty\n",
1848 wiphy_name(local->hw.wiphy));
1849 skb_queue_purge(&local->skb_queue);
1850 skb_queue_purge(&local->skb_queue_unreliable);
1852 destroy_workqueue(local->hw.workqueue);
1853 wiphy_unregister(local->hw.wiphy);
1854 ieee80211_wep_free(local);
1855 ieee80211_led_exit(local);
1856 free_netdev(local->mdev);
1858 EXPORT_SYMBOL(ieee80211_unregister_hw);
1860 void ieee80211_free_hw(struct ieee80211_hw *hw)
1862 struct ieee80211_local *local = hw_to_local(hw);
1864 wiphy_free(local->hw.wiphy);
1866 EXPORT_SYMBOL(ieee80211_free_hw);
1868 static int __init ieee80211_init(void)
1870 struct sk_buff *skb;
1873 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1874 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1875 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1877 ret = rc80211_pid_init();
1881 ret = ieee80211_wme_register();
1883 printk(KERN_DEBUG "ieee80211_init: failed to "
1884 "initialize WME (err=%d)\n", ret);
1885 goto out_cleanup_pid;
1888 ieee80211_debugfs_netdev_init();
1898 static void __exit ieee80211_exit(void)
1903 * For key todo, it'll be empty by now but the work
1904 * might still be scheduled.
1906 flush_scheduled_work();
1911 ieee80211_wme_unregister();
1912 ieee80211_debugfs_netdev_exit();
1916 subsys_initcall(ieee80211_init);
1917 module_exit(ieee80211_exit);
1919 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1920 MODULE_LICENSE("GPL");