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 netif_addr_lock(local->mdev);
296 ieee80211_configure_filter(local);
297 netif_addr_unlock(local->mdev);
298 netif_tx_unlock_bh(local->mdev);
300 case IEEE80211_IF_TYPE_STA:
301 case IEEE80211_IF_TYPE_IBSS:
302 sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
305 conf.vif = &sdata->vif;
306 conf.type = sdata->vif.type;
307 conf.mac_addr = dev->dev_addr;
308 res = local->ops->add_interface(local_to_hw(local), &conf);
312 if (ieee80211_vif_is_mesh(&sdata->vif))
313 ieee80211_start_mesh(sdata->dev);
314 changed |= ieee80211_reset_erp_info(dev);
315 ieee80211_bss_info_change_notify(sdata, changed);
316 ieee80211_enable_keys(sdata);
318 if (sdata->vif.type == IEEE80211_IF_TYPE_STA &&
319 !(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
320 netif_carrier_off(dev);
322 netif_carrier_on(dev);
325 if (sdata->vif.type == IEEE80211_IF_TYPE_WDS) {
326 /* Create STA entry for the WDS peer */
327 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
331 goto err_del_interface;
334 /* no locking required since STA is not live yet */
335 sta->flags |= WLAN_STA_AUTHORIZED;
337 res = sta_info_insert(sta);
339 /* STA has been freed */
340 goto err_del_interface;
344 if (local->open_count == 0) {
345 res = dev_open(local->mdev);
348 goto err_del_interface;
349 tasklet_enable(&local->tx_pending_tasklet);
350 tasklet_enable(&local->tasklet);
354 * set_multicast_list will be invoked by the networking core
355 * which will check whether any increments here were done in
356 * error and sync them down to the hardware as filter flags.
358 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
359 atomic_inc(&local->iff_allmultis);
361 if (sdata->flags & IEEE80211_SDATA_PROMISC)
362 atomic_inc(&local->iff_promiscs);
365 if (need_hw_reconfig)
366 ieee80211_hw_config(local);
369 * ieee80211_sta_work is disabled while network interface
370 * is down. Therefore, some configuration changes may not
371 * yet be effective. Trigger execution of ieee80211_sta_work
374 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
375 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
376 struct ieee80211_if_sta *ifsta = &sdata->u.sta;
377 queue_work(local->hw.workqueue, &ifsta->work);
380 netif_start_queue(dev);
384 local->ops->remove_interface(local_to_hw(local), &conf);
386 if (!local->open_count && local->ops->stop)
387 local->ops->stop(local_to_hw(local));
390 if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN)
391 list_del(&sdata->u.vlan.list);
395 static int ieee80211_stop(struct net_device *dev)
397 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
398 struct ieee80211_local *local = sdata->local;
399 struct ieee80211_if_init_conf conf;
400 struct sta_info *sta;
403 * Stop TX on this interface first.
405 netif_stop_queue(dev);
408 * Now delete all active aggregation sessions.
412 list_for_each_entry_rcu(sta, &local->sta_list, list) {
413 if (sta->sdata == sdata)
414 ieee80211_sta_tear_down_BA_sessions(dev, sta->addr);
420 * Remove all stations associated with this interface.
422 * This must be done before calling ops->remove_interface()
423 * because otherwise we can later invoke ops->sta_notify()
424 * whenever the STAs are removed, and that invalidates driver
425 * assumptions about always getting a vif pointer that is valid
426 * (because if we remove a STA after ops->remove_interface()
427 * the driver will have removed the vif info already!)
429 * We could relax this and only unlink the stations from the
430 * hash table and list but keep them on a per-sdata list that
431 * will be inserted back again when the interface is brought
432 * up again, but I don't currently see a use case for that,
433 * except with WDS which gets a STA entry created when it is
436 sta_info_flush(local, sdata);
439 * Don't count this interface for promisc/allmulti while it
440 * is down. dev_mc_unsync() will invoke set_multicast_list
441 * on the master interface which will sync these down to the
442 * hardware as filter flags.
444 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
445 atomic_dec(&local->iff_allmultis);
447 if (sdata->flags & IEEE80211_SDATA_PROMISC)
448 atomic_dec(&local->iff_promiscs);
450 dev_mc_unsync(local->mdev, dev);
452 /* APs need special treatment */
453 if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
454 struct ieee80211_sub_if_data *vlan, *tmp;
455 struct beacon_data *old_beacon = sdata->u.ap.beacon;
458 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
462 /* down all dependent devices, that is VLANs */
463 list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
465 dev_close(vlan->dev);
466 WARN_ON(!list_empty(&sdata->u.ap.vlans));
471 switch (sdata->vif.type) {
472 case IEEE80211_IF_TYPE_VLAN:
473 list_del(&sdata->u.vlan.list);
474 /* no need to tell driver */
476 case IEEE80211_IF_TYPE_MNTR:
477 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
478 local->cooked_mntrs--;
483 if (local->monitors == 0)
484 local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP;
486 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
487 local->fif_fcsfail--;
488 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
489 local->fif_plcpfail--;
490 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
491 local->fif_control--;
492 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
493 local->fif_other_bss--;
495 netif_tx_lock_bh(local->mdev);
496 netif_addr_lock(local->mdev);
497 ieee80211_configure_filter(local);
498 netif_addr_unlock(local->mdev);
499 netif_tx_unlock_bh(local->mdev);
501 case IEEE80211_IF_TYPE_MESH_POINT:
502 case IEEE80211_IF_TYPE_STA:
503 case IEEE80211_IF_TYPE_IBSS:
504 sdata->u.sta.state = IEEE80211_DISABLED;
505 memset(sdata->u.sta.bssid, 0, ETH_ALEN);
506 del_timer_sync(&sdata->u.sta.timer);
508 * When we get here, the interface is marked down.
509 * Call synchronize_rcu() to wait for the RX path
510 * should it be using the interface and enqueuing
511 * frames at this very time on another CPU.
514 skb_queue_purge(&sdata->u.sta.skb_queue);
516 if (local->scan_dev == sdata->dev) {
517 if (!local->ops->hw_scan) {
518 local->sta_sw_scanning = 0;
519 cancel_delayed_work(&local->scan_work);
521 local->sta_hw_scanning = 0;
524 sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
525 kfree(sdata->u.sta.extra_ie);
526 sdata->u.sta.extra_ie = NULL;
527 sdata->u.sta.extra_ie_len = 0;
530 conf.vif = &sdata->vif;
531 conf.type = sdata->vif.type;
532 conf.mac_addr = dev->dev_addr;
533 /* disable all keys for as long as this netdev is down */
534 ieee80211_disable_keys(sdata);
535 local->ops->remove_interface(local_to_hw(local), &conf);
540 if (local->open_count == 0) {
541 if (netif_running(local->mdev))
542 dev_close(local->mdev);
544 if (local->ops->stop)
545 local->ops->stop(local_to_hw(local));
547 ieee80211_led_radio(local, 0);
549 flush_workqueue(local->hw.workqueue);
551 tasklet_disable(&local->tx_pending_tasklet);
552 tasklet_disable(&local->tasklet);
558 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid)
560 struct ieee80211_local *local = hw_to_local(hw);
561 struct netdev_queue *txq;
562 struct sta_info *sta;
563 struct ieee80211_sub_if_data *sdata;
564 u16 start_seq_num = 0;
567 DECLARE_MAC_BUF(mac);
569 if (tid >= STA_TID_NUM)
572 #ifdef CONFIG_MAC80211_HT_DEBUG
573 printk(KERN_DEBUG "Open BA session requested for %s tid %u\n",
574 print_mac(mac, ra), tid);
575 #endif /* CONFIG_MAC80211_HT_DEBUG */
579 sta = sta_info_get(local, ra);
581 #ifdef CONFIG_MAC80211_HT_DEBUG
582 printk(KERN_DEBUG "Could not find the station\n");
588 spin_lock_bh(&sta->lock);
590 /* we have tried too many times, receiver does not want A-MPDU */
591 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
596 state = &sta->ampdu_mlme.tid_state_tx[tid];
597 /* check if the TID is not in aggregation flow already */
598 if (*state != HT_AGG_STATE_IDLE) {
599 #ifdef CONFIG_MAC80211_HT_DEBUG
600 printk(KERN_DEBUG "BA request denied - session is not "
601 "idle on tid %u\n", tid);
602 #endif /* CONFIG_MAC80211_HT_DEBUG */
607 /* prepare A-MPDU MLME for Tx aggregation */
608 sta->ampdu_mlme.tid_tx[tid] =
609 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
610 if (!sta->ampdu_mlme.tid_tx[tid]) {
611 #ifdef CONFIG_MAC80211_HT_DEBUG
613 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
620 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
621 sta_addba_resp_timer_expired;
622 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
623 (unsigned long)&sta->timer_to_tid[tid];
624 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
626 /* ensure that TX flow won't interrupt us
627 * until the end of the call to requeue function */
628 txq = &local->mdev->tx_queue;
629 spin_lock_bh(&txq->lock);
631 /* create a new queue for this aggregation */
632 ret = ieee80211_ht_agg_queue_add(local, sta, tid);
634 /* case no queue is available to aggregation
635 * don't switch to aggregation */
637 #ifdef CONFIG_MAC80211_HT_DEBUG
638 printk(KERN_DEBUG "BA request denied - queue unavailable for"
640 #endif /* CONFIG_MAC80211_HT_DEBUG */
641 goto err_unlock_queue;
645 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
646 * call back right away, it must see that the flow has begun */
647 *state |= HT_ADDBA_REQUESTED_MSK;
649 if (local->ops->ampdu_action)
650 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_START,
651 ra, tid, &start_seq_num);
654 /* No need to requeue the packets in the agg queue, since we
655 * held the tx lock: no packet could be enqueued to the newly
657 ieee80211_ht_agg_queue_remove(local, sta, tid, 0);
658 #ifdef CONFIG_MAC80211_HT_DEBUG
659 printk(KERN_DEBUG "BA request denied - HW unavailable for"
661 #endif /* CONFIG_MAC80211_HT_DEBUG */
662 *state = HT_AGG_STATE_IDLE;
663 goto err_unlock_queue;
666 /* Will put all the packets in the new SW queue */
667 ieee80211_requeue(local, ieee802_1d_to_ac[tid]);
668 spin_unlock_bh(&txq->lock);
669 spin_unlock_bh(&sta->lock);
671 /* send an addBA request */
672 sta->ampdu_mlme.dialog_token_allocator++;
673 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
674 sta->ampdu_mlme.dialog_token_allocator;
675 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
678 ieee80211_send_addba_request(sta->sdata->dev, ra, tid,
679 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
680 sta->ampdu_mlme.tid_tx[tid]->ssn,
682 /* activate the timer for the recipient's addBA response */
683 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
684 jiffies + ADDBA_RESP_INTERVAL;
685 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
686 #ifdef CONFIG_MAC80211_HT_DEBUG
687 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
692 kfree(sta->ampdu_mlme.tid_tx[tid]);
693 sta->ampdu_mlme.tid_tx[tid] = NULL;
694 spin_unlock_bh(&txq->lock);
697 spin_unlock_bh(&sta->lock);
702 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
704 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw,
706 enum ieee80211_back_parties initiator)
708 struct ieee80211_local *local = hw_to_local(hw);
709 struct sta_info *sta;
712 DECLARE_MAC_BUF(mac);
714 if (tid >= STA_TID_NUM)
718 sta = sta_info_get(local, ra);
724 /* check if the TID is in aggregation */
725 state = &sta->ampdu_mlme.tid_state_tx[tid];
726 spin_lock_bh(&sta->lock);
728 if (*state != HT_AGG_STATE_OPERATIONAL) {
733 #ifdef CONFIG_MAC80211_HT_DEBUG
734 printk(KERN_DEBUG "Tx BA session stop requested for %s tid %u\n",
735 print_mac(mac, ra), tid);
736 #endif /* CONFIG_MAC80211_HT_DEBUG */
738 ieee80211_stop_queue(hw, sta->tid_to_tx_q[tid]);
740 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
741 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
743 if (local->ops->ampdu_action)
744 ret = local->ops->ampdu_action(hw, IEEE80211_AMPDU_TX_STOP,
747 /* case HW denied going back to legacy */
749 WARN_ON(ret != -EBUSY);
750 *state = HT_AGG_STATE_OPERATIONAL;
751 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
756 spin_unlock_bh(&sta->lock);
760 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
762 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid)
764 struct ieee80211_local *local = hw_to_local(hw);
765 struct sta_info *sta;
767 DECLARE_MAC_BUF(mac);
769 if (tid >= STA_TID_NUM) {
770 #ifdef CONFIG_MAC80211_HT_DEBUG
771 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
778 sta = sta_info_get(local, ra);
781 #ifdef CONFIG_MAC80211_HT_DEBUG
782 printk(KERN_DEBUG "Could not find station: %s\n",
788 state = &sta->ampdu_mlme.tid_state_tx[tid];
789 spin_lock_bh(&sta->lock);
791 if (!(*state & HT_ADDBA_REQUESTED_MSK)) {
792 #ifdef CONFIG_MAC80211_HT_DEBUG
793 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
796 spin_unlock_bh(&sta->lock);
801 WARN_ON_ONCE(*state & HT_ADDBA_DRV_READY_MSK);
803 *state |= HT_ADDBA_DRV_READY_MSK;
805 if (*state == HT_AGG_STATE_OPERATIONAL) {
806 #ifdef CONFIG_MAC80211_HT_DEBUG
807 printk(KERN_DEBUG "Aggregation is on for tid %d \n", tid);
809 ieee80211_wake_queue(hw, sta->tid_to_tx_q[tid]);
811 spin_unlock_bh(&sta->lock);
814 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
816 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid)
818 struct ieee80211_local *local = hw_to_local(hw);
819 struct netdev_queue *txq;
820 struct sta_info *sta;
823 DECLARE_MAC_BUF(mac);
825 if (tid >= STA_TID_NUM) {
826 #ifdef CONFIG_MAC80211_HT_DEBUG
827 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
833 #ifdef CONFIG_MAC80211_HT_DEBUG
834 printk(KERN_DEBUG "Stopping Tx BA session for %s tid %d\n",
835 print_mac(mac, ra), tid);
836 #endif /* CONFIG_MAC80211_HT_DEBUG */
839 sta = sta_info_get(local, ra);
841 #ifdef CONFIG_MAC80211_HT_DEBUG
842 printk(KERN_DEBUG "Could not find station: %s\n",
848 state = &sta->ampdu_mlme.tid_state_tx[tid];
850 /* NOTE: no need to use sta->lock in this state check, as
851 * ieee80211_stop_tx_ba_session will let only
852 * one stop call to pass through per sta/tid */
853 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
854 #ifdef CONFIG_MAC80211_HT_DEBUG
855 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
861 if (*state & HT_AGG_STATE_INITIATOR_MSK)
862 ieee80211_send_delba(sta->sdata->dev, ra, tid,
863 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
865 agg_queue = sta->tid_to_tx_q[tid];
867 /* avoid ordering issues: we are the only one that can modify
868 * the content of the qdiscs */
869 txq = &local->mdev->tx_queue;
870 spin_lock_bh(&txq->lock);
871 /* remove the queue for this aggregation */
872 ieee80211_ht_agg_queue_remove(local, sta, tid, 1);
873 spin_unlock_bh(&txq->lock);
875 /* we just requeued the all the frames that were in the removed
876 * queue, and since we might miss a softirq we do netif_schedule_queue.
877 * ieee80211_wake_queue is not used here as this queue is not
878 * necessarily stopped */
879 netif_schedule_queue(txq);
880 spin_lock_bh(&sta->lock);
881 *state = HT_AGG_STATE_IDLE;
882 sta->ampdu_mlme.addba_req_num[tid] = 0;
883 kfree(sta->ampdu_mlme.tid_tx[tid]);
884 sta->ampdu_mlme.tid_tx[tid] = NULL;
885 spin_unlock_bh(&sta->lock);
889 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
891 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
892 const u8 *ra, u16 tid)
894 struct ieee80211_local *local = hw_to_local(hw);
895 struct ieee80211_ra_tid *ra_tid;
896 struct sk_buff *skb = dev_alloc_skb(0);
898 if (unlikely(!skb)) {
899 #ifdef CONFIG_MAC80211_HT_DEBUG
901 printk(KERN_WARNING "%s: Not enough memory, "
902 "dropping start BA session", skb->dev->name);
906 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
907 memcpy(&ra_tid->ra, ra, ETH_ALEN);
910 skb->pkt_type = IEEE80211_ADDBA_MSG;
911 skb_queue_tail(&local->skb_queue, skb);
912 tasklet_schedule(&local->tasklet);
914 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
916 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw,
917 const u8 *ra, u16 tid)
919 struct ieee80211_local *local = hw_to_local(hw);
920 struct ieee80211_ra_tid *ra_tid;
921 struct sk_buff *skb = dev_alloc_skb(0);
923 if (unlikely(!skb)) {
924 #ifdef CONFIG_MAC80211_HT_DEBUG
926 printk(KERN_WARNING "%s: Not enough memory, "
927 "dropping stop BA session", skb->dev->name);
931 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
932 memcpy(&ra_tid->ra, ra, ETH_ALEN);
935 skb->pkt_type = IEEE80211_DELBA_MSG;
936 skb_queue_tail(&local->skb_queue, skb);
937 tasklet_schedule(&local->tasklet);
939 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
941 static void ieee80211_set_multicast_list(struct net_device *dev)
943 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
944 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
945 int allmulti, promisc, sdata_allmulti, sdata_promisc;
947 allmulti = !!(dev->flags & IFF_ALLMULTI);
948 promisc = !!(dev->flags & IFF_PROMISC);
949 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
950 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
952 if (allmulti != sdata_allmulti) {
953 if (dev->flags & IFF_ALLMULTI)
954 atomic_inc(&local->iff_allmultis);
956 atomic_dec(&local->iff_allmultis);
957 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
960 if (promisc != sdata_promisc) {
961 if (dev->flags & IFF_PROMISC)
962 atomic_inc(&local->iff_promiscs);
964 atomic_dec(&local->iff_promiscs);
965 sdata->flags ^= IEEE80211_SDATA_PROMISC;
968 dev_mc_sync(local->mdev, dev);
971 static const struct header_ops ieee80211_header_ops = {
972 .create = eth_header,
973 .parse = header_parse_80211,
974 .rebuild = eth_rebuild_header,
975 .cache = eth_header_cache,
976 .cache_update = eth_header_cache_update,
979 void ieee80211_if_setup(struct net_device *dev)
982 dev->hard_start_xmit = ieee80211_subif_start_xmit;
983 dev->wireless_handlers = &ieee80211_iw_handler_def;
984 dev->set_multicast_list = ieee80211_set_multicast_list;
985 dev->change_mtu = ieee80211_change_mtu;
986 dev->open = ieee80211_open;
987 dev->stop = ieee80211_stop;
988 dev->destructor = free_netdev;
991 /* everything else */
993 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed)
995 struct ieee80211_local *local = sdata->local;
996 struct ieee80211_if_conf conf;
998 if (WARN_ON(!netif_running(sdata->dev)))
1001 if (!local->ops->config_interface)
1004 memset(&conf, 0, sizeof(conf));
1005 conf.changed = changed;
1007 if (sdata->vif.type == IEEE80211_IF_TYPE_STA ||
1008 sdata->vif.type == IEEE80211_IF_TYPE_IBSS) {
1009 conf.bssid = sdata->u.sta.bssid;
1010 conf.ssid = sdata->u.sta.ssid;
1011 conf.ssid_len = sdata->u.sta.ssid_len;
1012 } else if (sdata->vif.type == IEEE80211_IF_TYPE_AP) {
1013 conf.bssid = sdata->dev->dev_addr;
1014 conf.ssid = sdata->u.ap.ssid;
1015 conf.ssid_len = sdata->u.ap.ssid_len;
1016 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
1017 u8 zero[ETH_ALEN] = { 0 };
1026 if (WARN_ON(!conf.bssid && (changed & IEEE80211_IFCC_BSSID)))
1029 if (WARN_ON(!conf.ssid && (changed & IEEE80211_IFCC_SSID)))
1032 return local->ops->config_interface(local_to_hw(local),
1033 &sdata->vif, &conf);
1036 int ieee80211_hw_config(struct ieee80211_local *local)
1038 struct ieee80211_channel *chan;
1041 if (local->sta_sw_scanning)
1042 chan = local->scan_channel;
1044 chan = local->oper_channel;
1046 local->hw.conf.channel = chan;
1048 if (!local->hw.conf.power_level)
1049 local->hw.conf.power_level = chan->max_power;
1051 local->hw.conf.power_level = min(chan->max_power,
1052 local->hw.conf.power_level);
1054 local->hw.conf.max_antenna_gain = chan->max_antenna_gain;
1056 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1057 printk(KERN_DEBUG "%s: HW CONFIG: freq=%d\n",
1058 wiphy_name(local->hw.wiphy), chan->center_freq);
1061 if (local->open_count)
1062 ret = local->ops->config(local_to_hw(local), &local->hw.conf);
1068 * ieee80211_handle_ht should be used only after legacy configuration
1069 * has been determined namely band, as ht configuration depends upon
1070 * the hardware's HT abilities for a _specific_ band.
1072 u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
1073 struct ieee80211_ht_info *req_ht_cap,
1074 struct ieee80211_ht_bss_info *req_bss_cap)
1076 struct ieee80211_conf *conf = &local->hw.conf;
1077 struct ieee80211_supported_band *sband;
1078 struct ieee80211_ht_info ht_conf;
1079 struct ieee80211_ht_bss_info ht_bss_conf;
1082 u8 max_tx_streams = IEEE80211_HT_CAP_MAX_STREAMS;
1085 sband = local->hw.wiphy->bands[conf->channel->band];
1087 memset(&ht_conf, 0, sizeof(struct ieee80211_ht_info));
1088 memset(&ht_bss_conf, 0, sizeof(struct ieee80211_ht_bss_info));
1090 /* HT is not supported */
1091 if (!sband->ht_info.ht_supported) {
1092 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1098 if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE)
1099 changed |= BSS_CHANGED_HT;
1100 conf->flags &= ~IEEE80211_CONF_SUPPORT_HT_MODE;
1101 conf->ht_conf.ht_supported = 0;
1106 if (!(conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE))
1107 changed |= BSS_CHANGED_HT;
1109 conf->flags |= IEEE80211_CONF_SUPPORT_HT_MODE;
1110 ht_conf.ht_supported = 1;
1112 ht_conf.cap = req_ht_cap->cap & sband->ht_info.cap;
1113 ht_conf.cap &= ~(IEEE80211_HT_CAP_MIMO_PS);
1114 ht_conf.cap |= sband->ht_info.cap & IEEE80211_HT_CAP_MIMO_PS;
1115 ht_bss_conf.primary_channel = req_bss_cap->primary_channel;
1116 ht_bss_conf.bss_cap = req_bss_cap->bss_cap;
1117 ht_bss_conf.bss_op_mode = req_bss_cap->bss_op_mode;
1119 ht_conf.ampdu_factor = req_ht_cap->ampdu_factor;
1120 ht_conf.ampdu_density = req_ht_cap->ampdu_density;
1123 tx_mcs_set_cap = sband->ht_info.supp_mcs_set[12];
1125 /* configure suppoerted Tx MCS according to requested MCS
1126 * (based in most cases on Rx capabilities of peer) and self
1127 * Tx MCS capabilities (as defined by low level driver HW
1128 * Tx capabilities) */
1129 if (!(tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_DEFINED))
1132 /* Counting from 0 therfore + 1 */
1133 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_RX_DIFF)
1134 max_tx_streams = ((tx_mcs_set_cap &
1135 IEEE80211_HT_CAP_MCS_TX_STREAMS) >> 2) + 1;
1137 for (i = 0; i < max_tx_streams; i++)
1138 ht_conf.supp_mcs_set[i] =
1139 sband->ht_info.supp_mcs_set[i] &
1140 req_ht_cap->supp_mcs_set[i];
1142 if (tx_mcs_set_cap & IEEE80211_HT_CAP_MCS_TX_UEQM)
1143 for (i = IEEE80211_SUPP_MCS_SET_UEQM;
1144 i < IEEE80211_SUPP_MCS_SET_LEN; i++)
1145 ht_conf.supp_mcs_set[i] =
1146 sband->ht_info.supp_mcs_set[i] &
1147 req_ht_cap->supp_mcs_set[i];
1150 /* if bss configuration changed store the new one */
1151 if (memcmp(&conf->ht_conf, &ht_conf, sizeof(ht_conf)) ||
1152 memcmp(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf))) {
1153 changed |= BSS_CHANGED_HT;
1154 memcpy(&conf->ht_conf, &ht_conf, sizeof(ht_conf));
1155 memcpy(&conf->ht_bss_conf, &ht_bss_conf, sizeof(ht_bss_conf));
1161 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1164 struct ieee80211_local *local = sdata->local;
1169 if (local->ops->bss_info_changed)
1170 local->ops->bss_info_changed(local_to_hw(local),
1176 u32 ieee80211_reset_erp_info(struct net_device *dev)
1178 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1180 sdata->bss_conf.use_cts_prot = 0;
1181 sdata->bss_conf.use_short_preamble = 0;
1182 return BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_ERP_PREAMBLE;
1185 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
1186 struct sk_buff *skb)
1188 struct ieee80211_local *local = hw_to_local(hw);
1189 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1192 skb->dev = local->mdev;
1193 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
1194 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
1195 &local->skb_queue : &local->skb_queue_unreliable, skb);
1196 tmp = skb_queue_len(&local->skb_queue) +
1197 skb_queue_len(&local->skb_queue_unreliable);
1198 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
1199 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1200 dev_kfree_skb_irq(skb);
1202 I802_DEBUG_INC(local->tx_status_drop);
1204 tasklet_schedule(&local->tasklet);
1206 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
1208 static void ieee80211_tasklet_handler(unsigned long data)
1210 struct ieee80211_local *local = (struct ieee80211_local *) data;
1211 struct sk_buff *skb;
1212 struct ieee80211_rx_status rx_status;
1213 struct ieee80211_ra_tid *ra_tid;
1215 while ((skb = skb_dequeue(&local->skb_queue)) ||
1216 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
1217 switch (skb->pkt_type) {
1218 case IEEE80211_RX_MSG:
1219 /* status is in skb->cb */
1220 memcpy(&rx_status, skb->cb, sizeof(rx_status));
1221 /* Clear skb->pkt_type in order to not confuse kernel
1224 __ieee80211_rx(local_to_hw(local), skb, &rx_status);
1226 case IEEE80211_TX_STATUS_MSG:
1228 ieee80211_tx_status(local_to_hw(local), skb);
1230 case IEEE80211_DELBA_MSG:
1231 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1232 ieee80211_stop_tx_ba_cb(local_to_hw(local),
1233 ra_tid->ra, ra_tid->tid);
1236 case IEEE80211_ADDBA_MSG:
1237 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
1238 ieee80211_start_tx_ba_cb(local_to_hw(local),
1239 ra_tid->ra, ra_tid->tid);
1250 /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to
1251 * make a prepared TX frame (one that has been given to hw) to look like brand
1252 * new IEEE 802.11 frame that is ready to go through TX processing again.
1253 * Also, tx_packet_data in cb is restored from tx_control. */
1254 static void ieee80211_remove_tx_extra(struct ieee80211_local *local,
1255 struct ieee80211_key *key,
1256 struct sk_buff *skb)
1258 int hdrlen, iv_len, mic_len;
1259 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1261 info->flags &= IEEE80211_TX_CTL_REQ_TX_STATUS |
1262 IEEE80211_TX_CTL_DO_NOT_ENCRYPT |
1263 IEEE80211_TX_CTL_REQUEUE |
1264 IEEE80211_TX_CTL_EAPOL_FRAME;
1266 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1271 switch (key->conf.alg) {
1273 iv_len = WEP_IV_LEN;
1274 mic_len = WEP_ICV_LEN;
1277 iv_len = TKIP_IV_LEN;
1278 mic_len = TKIP_ICV_LEN;
1281 iv_len = CCMP_HDR_LEN;
1282 mic_len = CCMP_MIC_LEN;
1288 if (skb->len >= mic_len &&
1289 !(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
1290 skb_trim(skb, skb->len - mic_len);
1291 if (skb->len >= iv_len && skb->len > hdrlen) {
1292 memmove(skb->data + iv_len, skb->data, hdrlen);
1293 skb_pull(skb, iv_len);
1298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1299 u16 fc = le16_to_cpu(hdr->frame_control);
1300 if ((fc & 0x8C) == 0x88) /* QoS Control Field */ {
1301 fc &= ~IEEE80211_STYPE_QOS_DATA;
1302 hdr->frame_control = cpu_to_le16(fc);
1303 memmove(skb->data + 2, skb->data, hdrlen - 2);
1309 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
1310 struct sta_info *sta,
1311 struct sk_buff *skb)
1313 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1315 sta->tx_filtered_count++;
1318 * Clear the TX filter mask for this STA when sending the next
1319 * packet. If the STA went to power save mode, this will happen
1320 * when it wakes up for the next time.
1322 set_sta_flags(sta, WLAN_STA_CLEAR_PS_FILT);
1325 * This code races in the following way:
1327 * (1) STA sends frame indicating it will go to sleep and does so
1328 * (2) hardware/firmware adds STA to filter list, passes frame up
1329 * (3) hardware/firmware processes TX fifo and suppresses a frame
1330 * (4) we get TX status before having processed the frame and
1331 * knowing that the STA has gone to sleep.
1333 * This is actually quite unlikely even when both those events are
1334 * processed from interrupts coming in quickly after one another or
1335 * even at the same time because we queue both TX status events and
1336 * RX frames to be processed by a tasklet and process them in the
1337 * same order that they were received or TX status last. Hence, there
1338 * is no race as long as the frame RX is processed before the next TX
1339 * status, which drivers can ensure, see below.
1341 * Note that this can only happen if the hardware or firmware can
1342 * actually add STAs to the filter list, if this is done by the
1343 * driver in response to set_tim() (which will only reduce the race
1344 * this whole filtering tries to solve, not completely solve it)
1345 * this situation cannot happen.
1347 * To completely solve this race drivers need to make sure that they
1348 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
1350 * (b) always process RX events before TX status events if ordering
1351 * can be unknown, for example with different interrupt status
1354 if (test_sta_flags(sta, WLAN_STA_PS) &&
1355 skb_queue_len(&sta->tx_filtered) < STA_MAX_TX_BUFFER) {
1356 ieee80211_remove_tx_extra(local, sta->key, skb);
1357 skb_queue_tail(&sta->tx_filtered, skb);
1361 if (!test_sta_flags(sta, WLAN_STA_PS) &&
1362 !(info->flags & IEEE80211_TX_CTL_REQUEUE)) {
1363 /* Software retry the packet once */
1364 info->flags |= IEEE80211_TX_CTL_REQUEUE;
1365 ieee80211_remove_tx_extra(local, sta->key, skb);
1366 dev_queue_xmit(skb);
1370 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1371 if (net_ratelimit())
1372 printk(KERN_DEBUG "%s: dropped TX filtered frame, "
1373 "queue_len=%d PS=%d @%lu\n",
1374 wiphy_name(local->hw.wiphy),
1375 skb_queue_len(&sta->tx_filtered),
1376 !!test_sta_flags(sta, WLAN_STA_PS), jiffies);
1381 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1383 struct sk_buff *skb2;
1384 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1385 struct ieee80211_local *local = hw_to_local(hw);
1386 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1389 struct ieee80211_tx_status_rtap_hdr *rthdr;
1390 struct ieee80211_sub_if_data *sdata;
1391 struct net_device *prev_dev = NULL;
1392 struct sta_info *sta;
1396 if (info->status.excessive_retries) {
1397 sta = sta_info_get(local, hdr->addr1);
1399 if (test_sta_flags(sta, WLAN_STA_PS)) {
1401 * The STA is in power save mode, so assume
1402 * that this TX packet failed because of that.
1404 ieee80211_handle_filtered_frame(local, sta, skb);
1411 fc = hdr->frame_control;
1413 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
1414 (ieee80211_is_data_qos(fc))) {
1417 sta = sta_info_get(local, hdr->addr1);
1419 qc = ieee80211_get_qos_ctl(hdr);
1421 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
1422 & IEEE80211_SCTL_SEQ);
1423 ieee80211_send_bar(sta->sdata->dev, hdr->addr1,
1428 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
1429 sta = sta_info_get(local, hdr->addr1);
1431 ieee80211_handle_filtered_frame(local, sta, skb);
1436 rate_control_tx_status(local->mdev, skb);
1440 ieee80211_led_tx(local, 0);
1443 * Fragments are passed to low-level drivers as separate skbs, so these
1444 * are actually fragments, not frames. Update frame counters only for
1445 * the first fragment of the frame. */
1447 frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
1448 type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE;
1450 if (info->flags & IEEE80211_TX_STAT_ACK) {
1452 local->dot11TransmittedFrameCount++;
1453 if (is_multicast_ether_addr(hdr->addr1))
1454 local->dot11MulticastTransmittedFrameCount++;
1455 if (info->status.retry_count > 0)
1456 local->dot11RetryCount++;
1457 if (info->status.retry_count > 1)
1458 local->dot11MultipleRetryCount++;
1461 /* This counter shall be incremented for an acknowledged MPDU
1462 * with an individual address in the address 1 field or an MPDU
1463 * with a multicast address in the address 1 field of type Data
1465 if (!is_multicast_ether_addr(hdr->addr1) ||
1466 type == IEEE80211_FTYPE_DATA ||
1467 type == IEEE80211_FTYPE_MGMT)
1468 local->dot11TransmittedFragmentCount++;
1471 local->dot11FailedCount++;
1474 /* this was a transmitted frame, but now we want to reuse it */
1478 * This is a bit racy but we can avoid a lot of work
1481 if (!local->monitors && !local->cooked_mntrs) {
1486 /* send frame to monitor interfaces now */
1488 if (skb_headroom(skb) < sizeof(*rthdr)) {
1489 printk(KERN_ERR "ieee80211_tx_status: headroom too small\n");
1494 rthdr = (struct ieee80211_tx_status_rtap_hdr *)
1495 skb_push(skb, sizeof(*rthdr));
1497 memset(rthdr, 0, sizeof(*rthdr));
1498 rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr));
1499 rthdr->hdr.it_present =
1500 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
1501 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
1503 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
1504 !is_multicast_ether_addr(hdr->addr1))
1505 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL);
1507 if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) &&
1508 (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT))
1509 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS);
1510 else if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS)
1511 rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS);
1513 rthdr->data_retries = info->status.retry_count;
1515 /* XXX: is this sufficient for BPF? */
1516 skb_set_mac_header(skb, 0);
1517 skb->ip_summed = CHECKSUM_UNNECESSARY;
1518 skb->pkt_type = PACKET_OTHERHOST;
1519 skb->protocol = htons(ETH_P_802_2);
1520 memset(skb->cb, 0, sizeof(skb->cb));
1523 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
1524 if (sdata->vif.type == IEEE80211_IF_TYPE_MNTR) {
1525 if (!netif_running(sdata->dev))
1529 skb2 = skb_clone(skb, GFP_ATOMIC);
1531 skb2->dev = prev_dev;
1536 prev_dev = sdata->dev;
1540 skb->dev = prev_dev;
1547 EXPORT_SYMBOL(ieee80211_tx_status);
1549 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
1550 const struct ieee80211_ops *ops)
1552 struct ieee80211_local *local;
1554 struct wiphy *wiphy;
1556 /* Ensure 32-byte alignment of our private data and hw private data.
1557 * We use the wiphy priv data for both our ieee80211_local and for
1558 * the driver's private data
1560 * In memory it'll be like this:
1562 * +-------------------------+
1564 * +-------------------------+
1565 * | struct ieee80211_local |
1566 * +-------------------------+
1567 * | driver's private data |
1568 * +-------------------------+
1571 priv_size = ((sizeof(struct ieee80211_local) +
1572 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) +
1575 wiphy = wiphy_new(&mac80211_config_ops, priv_size);
1580 wiphy->privid = mac80211_wiphy_privid;
1582 local = wiphy_priv(wiphy);
1583 local->hw.wiphy = wiphy;
1585 local->hw.priv = (char *)local +
1586 ((sizeof(struct ieee80211_local) +
1587 NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
1590 BUG_ON(!ops->start);
1592 BUG_ON(!ops->config);
1593 BUG_ON(!ops->add_interface);
1594 BUG_ON(!ops->remove_interface);
1595 BUG_ON(!ops->configure_filter);
1598 local->hw.queues = 1; /* default */
1600 local->bridge_packets = 1;
1602 local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
1603 local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
1604 local->short_retry_limit = 7;
1605 local->long_retry_limit = 4;
1606 local->hw.conf.radio_enabled = 1;
1608 INIT_LIST_HEAD(&local->interfaces);
1610 spin_lock_init(&local->key_lock);
1612 INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work);
1614 sta_info_init(local);
1616 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
1617 (unsigned long)local);
1618 tasklet_disable(&local->tx_pending_tasklet);
1620 tasklet_init(&local->tasklet,
1621 ieee80211_tasklet_handler,
1622 (unsigned long) local);
1623 tasklet_disable(&local->tasklet);
1625 skb_queue_head_init(&local->skb_queue);
1626 skb_queue_head_init(&local->skb_queue_unreliable);
1628 return local_to_hw(local);
1630 EXPORT_SYMBOL(ieee80211_alloc_hw);
1632 int ieee80211_register_hw(struct ieee80211_hw *hw)
1634 struct ieee80211_local *local = hw_to_local(hw);
1637 enum ieee80211_band band;
1638 struct net_device *mdev;
1639 struct wireless_dev *mwdev;
1642 * generic code guarantees at least one band,
1643 * set this very early because much code assumes
1644 * that hw.conf.channel is assigned
1646 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1647 struct ieee80211_supported_band *sband;
1649 sband = local->hw.wiphy->bands[band];
1651 /* init channel we're on */
1652 local->hw.conf.channel =
1653 local->oper_channel =
1654 local->scan_channel = &sband->channels[0];
1659 result = wiphy_register(local->hw.wiphy);
1664 * We use the number of queues for feature tests (QoS, HT) internally
1665 * so restrict them appropriately.
1667 #ifdef CONFIG_MAC80211_QOS
1668 if (hw->queues > IEEE80211_MAX_QUEUES)
1669 hw->queues = IEEE80211_MAX_QUEUES;
1670 if (hw->ampdu_queues > IEEE80211_MAX_AMPDU_QUEUES)
1671 hw->ampdu_queues = IEEE80211_MAX_AMPDU_QUEUES;
1673 hw->ampdu_queues = 0;
1676 hw->ampdu_queues = 0;
1679 mdev = alloc_netdev_mq(sizeof(struct wireless_dev),
1680 "wmaster%d", ether_setup,
1681 ieee80211_num_queues(hw));
1683 goto fail_mdev_alloc;
1685 if (ieee80211_num_queues(hw) > 1)
1686 mdev->features |= NETIF_F_MULTI_QUEUE;
1688 mwdev = netdev_priv(mdev);
1689 mdev->ieee80211_ptr = mwdev;
1690 mwdev->wiphy = local->hw.wiphy;
1694 ieee80211_rx_bss_list_init(local);
1696 mdev->hard_start_xmit = ieee80211_master_start_xmit;
1697 mdev->open = ieee80211_master_open;
1698 mdev->stop = ieee80211_master_stop;
1699 mdev->type = ARPHRD_IEEE80211;
1700 mdev->header_ops = &ieee80211_header_ops;
1701 mdev->set_multicast_list = ieee80211_master_set_multicast_list;
1703 name = wiphy_dev(local->hw.wiphy)->driver->name;
1704 local->hw.workqueue = create_freezeable_workqueue(name);
1705 if (!local->hw.workqueue) {
1707 goto fail_workqueue;
1711 * The hardware needs headroom for sending the frame,
1712 * and we need some headroom for passing the frame to monitor
1713 * interfaces, but never both at the same time.
1715 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1716 sizeof(struct ieee80211_tx_status_rtap_hdr));
1718 debugfs_hw_add(local);
1720 if (local->hw.conf.beacon_int < 10)
1721 local->hw.conf.beacon_int = 100;
1723 local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
1724 IEEE80211_HW_SIGNAL_DB |
1725 IEEE80211_HW_SIGNAL_DBM) ?
1726 IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
1727 local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?
1728 IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID;
1729 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
1730 local->wstats_flags |= IW_QUAL_DBM;
1732 result = sta_info_start(local);
1737 result = dev_alloc_name(local->mdev, local->mdev->name);
1741 memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1742 SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy));
1744 result = register_netdevice(local->mdev);
1748 result = ieee80211_init_rate_ctrl_alg(local,
1749 hw->rate_control_algorithm);
1751 printk(KERN_DEBUG "%s: Failed to initialize rate control "
1752 "algorithm\n", wiphy_name(local->hw.wiphy));
1756 result = ieee80211_wep_init(local);
1759 printk(KERN_DEBUG "%s: Failed to initialize wep\n",
1760 wiphy_name(local->hw.wiphy));
1764 ieee80211_install_qdisc(local->mdev);
1766 /* add one default STA interface */
1767 result = ieee80211_if_add(local, "wlan%d", NULL,
1768 IEEE80211_IF_TYPE_STA, NULL);
1770 printk(KERN_WARNING "%s: Failed to add default virtual iface\n",
1771 wiphy_name(local->hw.wiphy));
1775 ieee80211_led_init(local);
1780 rate_control_deinitialize(local);
1782 unregister_netdevice(local->mdev);
1786 sta_info_stop(local);
1788 debugfs_hw_del(local);
1789 destroy_workqueue(local->hw.workqueue);
1792 free_netdev(local->mdev);
1794 wiphy_unregister(local->hw.wiphy);
1797 EXPORT_SYMBOL(ieee80211_register_hw);
1799 void ieee80211_unregister_hw(struct ieee80211_hw *hw)
1801 struct ieee80211_local *local = hw_to_local(hw);
1803 tasklet_kill(&local->tx_pending_tasklet);
1804 tasklet_kill(&local->tasklet);
1809 * At this point, interface list manipulations are fine
1810 * because the driver cannot be handing us frames any
1811 * more and the tasklet is killed.
1814 /* First, we remove all virtual interfaces. */
1815 ieee80211_remove_interfaces(local);
1817 /* then, finally, remove the master interface */
1818 unregister_netdevice(local->mdev);
1822 ieee80211_rx_bss_list_deinit(local);
1823 ieee80211_clear_tx_pending(local);
1824 sta_info_stop(local);
1825 rate_control_deinitialize(local);
1826 debugfs_hw_del(local);
1828 if (skb_queue_len(&local->skb_queue)
1829 || skb_queue_len(&local->skb_queue_unreliable))
1830 printk(KERN_WARNING "%s: skb_queue not empty\n",
1831 wiphy_name(local->hw.wiphy));
1832 skb_queue_purge(&local->skb_queue);
1833 skb_queue_purge(&local->skb_queue_unreliable);
1835 destroy_workqueue(local->hw.workqueue);
1836 wiphy_unregister(local->hw.wiphy);
1837 ieee80211_wep_free(local);
1838 ieee80211_led_exit(local);
1839 free_netdev(local->mdev);
1841 EXPORT_SYMBOL(ieee80211_unregister_hw);
1843 void ieee80211_free_hw(struct ieee80211_hw *hw)
1845 struct ieee80211_local *local = hw_to_local(hw);
1847 wiphy_free(local->hw.wiphy);
1849 EXPORT_SYMBOL(ieee80211_free_hw);
1851 static int __init ieee80211_init(void)
1853 struct sk_buff *skb;
1856 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb));
1857 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
1858 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
1860 ret = rc80211_pid_init();
1864 ret = ieee80211_wme_register();
1866 printk(KERN_DEBUG "ieee80211_init: failed to "
1867 "initialize WME (err=%d)\n", ret);
1868 goto out_cleanup_pid;
1871 ieee80211_debugfs_netdev_init();
1881 static void __exit ieee80211_exit(void)
1886 * For key todo, it'll be empty by now but the work
1887 * might still be scheduled.
1889 flush_scheduled_work();
1894 ieee80211_wme_unregister();
1895 ieee80211_debugfs_netdev_exit();
1899 subsys_initcall(ieee80211_init);
1900 module_exit(ieee80211_exit);
1902 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1903 MODULE_LICENSE("GPL");