2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/timer.h>
19 #include <linux/rtnetlink.h>
21 #include <net/mac80211.h>
22 #include "ieee80211_i.h"
23 #include "driver-ops.h"
26 #include "debugfs_sta.h"
31 * DOC: STA information lifetime rules
33 * STA info structures (&struct sta_info) are managed in a hash table
34 * for faster lookup and a list for iteration. They are managed using
35 * RCU, i.e. access to the list and hash table is protected by RCU.
37 * Upon allocating a STA info structure with sta_info_alloc(), the caller
38 * owns that structure. It must then insert it into the hash table using
39 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
40 * case (which acquires an rcu read section but must not be called from
41 * within one) will the pointer still be valid after the call. Note that
42 * the caller may not do much with the STA info before inserting it, in
43 * particular, it may not start any mesh peer link management or add
46 * When the insertion fails (sta_info_insert()) returns non-zero), the
47 * structure will have been freed by sta_info_insert()!
49 * Station entries are added by mac80211 when you establish a link with a
50 * peer. This means different things for the different type of interfaces
51 * we support. For a regular station this mean we add the AP sta when we
52 * receive an association response from the AP. For IBSS this occurs when
53 * get to know about a peer on the same IBSS. For WDS we add the sta for
54 * the peer immediately upon device open. When using AP mode we add stations
55 * for each respective station upon request from userspace through nl80211.
57 * In order to remove a STA info structure, various sta_info_destroy_*()
58 * calls are available.
60 * There is no concept of ownership on a STA entry, each structure is
61 * owned by the global hash table/list until it is removed. All users of
62 * the structure need to be RCU protected so that the structure won't be
63 * freed before they are done using it.
66 /* Caller must hold local->sta_mtx */
67 static int sta_info_hash_del(struct ieee80211_local *local,
72 s = rcu_dereference_protected(local->sta_hash[STA_HASH(sta->sta.addr)],
73 lockdep_is_held(&local->sta_mtx));
77 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)],
82 while (rcu_access_pointer(s->hnext) &&
83 rcu_access_pointer(s->hnext) != sta)
84 s = rcu_dereference_protected(s->hnext,
85 lockdep_is_held(&local->sta_mtx));
86 if (rcu_access_pointer(s->hnext)) {
87 rcu_assign_pointer(s->hnext, sta->hnext);
94 static void __cleanup_single_sta(struct sta_info *sta)
97 struct tid_ampdu_tx *tid_tx;
98 struct ieee80211_sub_if_data *sdata = sta->sdata;
99 struct ieee80211_local *local = sdata->local;
102 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
103 test_sta_flag(sta, WLAN_STA_PS_DRIVER)) {
104 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
105 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
106 ps = &sdata->bss->ps;
107 else if (ieee80211_vif_is_mesh(&sdata->vif))
108 ps = &sdata->u.mesh.ps;
112 clear_sta_flag(sta, WLAN_STA_PS_STA);
113 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
115 atomic_dec(&ps->num_sta_ps);
116 sta_info_recalc_tim(sta);
119 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
120 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
121 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
122 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
125 if (ieee80211_vif_is_mesh(&sdata->vif))
126 mesh_sta_cleanup(sta);
128 cancel_work_sync(&sta->drv_unblock_wk);
131 * Destroy aggregation state here. It would be nice to wait for the
132 * driver to finish aggregation stop and then clean up, but for now
133 * drivers have to handle aggregation stop being requested, followed
134 * directly by station destruction.
136 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
137 kfree(sta->ampdu_mlme.tid_start_tx[i]);
138 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
141 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
146 static void cleanup_single_sta(struct sta_info *sta)
148 struct ieee80211_sub_if_data *sdata = sta->sdata;
149 struct ieee80211_local *local = sdata->local;
151 __cleanup_single_sta(sta);
152 sta_info_free(local, sta);
155 /* protected by RCU */
156 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
159 struct ieee80211_local *local = sdata->local;
160 struct sta_info *sta;
162 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
163 lockdep_is_held(&local->sta_mtx));
165 if (sta->sdata == sdata &&
166 ether_addr_equal(sta->sta.addr, addr))
168 sta = rcu_dereference_check(sta->hnext,
169 lockdep_is_held(&local->sta_mtx));
175 * Get sta info either from the specified interface
176 * or from one of its vlans
178 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
181 struct ieee80211_local *local = sdata->local;
182 struct sta_info *sta;
184 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
185 lockdep_is_held(&local->sta_mtx));
187 if ((sta->sdata == sdata ||
188 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) &&
189 ether_addr_equal(sta->sta.addr, addr))
191 sta = rcu_dereference_check(sta->hnext,
192 lockdep_is_held(&local->sta_mtx));
197 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
200 struct ieee80211_local *local = sdata->local;
201 struct sta_info *sta;
204 list_for_each_entry_rcu(sta, &local->sta_list, list) {
205 if (sdata != sta->sdata)
218 * sta_info_free - free STA
220 * @local: pointer to the global information
221 * @sta: STA info to free
223 * This function must undo everything done by sta_info_alloc()
224 * that may happen before sta_info_insert(). It may only be
225 * called when sta_info_insert() has not been attempted (and
226 * if that fails, the station is freed anyway.)
228 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
233 rate_control_free_sta(sta);
236 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
237 kfree(sta->tx_lat[i].bins);
241 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
246 /* Caller must hold local->sta_mtx */
247 static void sta_info_hash_add(struct ieee80211_local *local,
248 struct sta_info *sta)
250 lockdep_assert_held(&local->sta_mtx);
251 sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
252 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
255 static void sta_unblock(struct work_struct *wk)
257 struct sta_info *sta;
259 sta = container_of(wk, struct sta_info, drv_unblock_wk);
264 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
266 ieee80211_sta_ps_deliver_wakeup(sta);
268 } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) {
269 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
272 ieee80211_sta_ps_deliver_poll_response(sta);
274 } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) {
275 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
278 ieee80211_sta_ps_deliver_uapsd(sta);
281 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
284 static int sta_prepare_rate_control(struct ieee80211_local *local,
285 struct sta_info *sta, gfp_t gfp)
287 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
290 sta->rate_ctrl = local->rate_ctrl;
291 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
293 if (!sta->rate_ctrl_priv)
299 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
300 const u8 *addr, gfp_t gfp)
302 struct ieee80211_local *local = sdata->local;
303 struct sta_info *sta;
304 struct timespec uptime;
305 struct ieee80211_tx_latency_bin_ranges *tx_latency;
308 sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
313 tx_latency = rcu_dereference(local->tx_latency);
314 /* init stations Tx latency statistics && TID bins */
316 sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS *
317 sizeof(struct ieee80211_tx_latency_stat),
324 if (tx_latency->n_ranges) {
325 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
326 /* size of bins is size of the ranges +1 */
327 sta->tx_lat[i].bin_count =
328 tx_latency->n_ranges + 1;
329 sta->tx_lat[i].bins =
330 kcalloc(sta->tx_lat[i].bin_count,
331 sizeof(u32), GFP_ATOMIC);
332 if (!sta->tx_lat[i].bins) {
341 spin_lock_init(&sta->lock);
342 spin_lock_init(&sta->ps_lock);
343 INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
344 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
345 mutex_init(&sta->ampdu_mlme.mtx);
346 #ifdef CONFIG_MAC80211_MESH
347 if (ieee80211_vif_is_mesh(&sdata->vif) &&
348 !sdata->u.mesh.user_mpm)
349 init_timer(&sta->plink_timer);
350 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
353 memcpy(sta->sta.addr, addr, ETH_ALEN);
356 sta->last_rx = jiffies;
358 sta->sta_state = IEEE80211_STA_NONE;
360 do_posix_clock_monotonic_gettime(&uptime);
361 sta->last_connected = uptime.tv_sec;
362 ewma_init(&sta->avg_signal, 1024, 8);
363 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
364 ewma_init(&sta->chain_signal_avg[i], 1024, 8);
366 if (sta_prepare_rate_control(local, sta, gfp))
369 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
371 * timer_to_tid must be initialized with identity mapping
372 * to enable session_timer's data differentiation. See
373 * sta_rx_agg_session_timer_expired for usage.
375 sta->timer_to_tid[i] = i;
377 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
378 skb_queue_head_init(&sta->ps_tx_buf[i]);
379 skb_queue_head_init(&sta->tx_filtered[i]);
382 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
383 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
385 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
386 if (sdata->vif.type == NL80211_IFTYPE_AP ||
387 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
388 struct ieee80211_supported_band *sband =
389 local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
390 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
391 IEEE80211_HT_CAP_SM_PS_SHIFT;
393 * Assume that hostapd advertises our caps in the beacon and
394 * this is the known_smps_mode for a station that just assciated
397 case WLAN_HT_SMPS_CONTROL_DISABLED:
398 sta->known_smps_mode = IEEE80211_SMPS_OFF;
400 case WLAN_HT_SMPS_CONTROL_STATIC:
401 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
403 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
404 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
411 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
416 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
417 kfree(sta->tx_lat[i].bins);
424 static int sta_info_insert_check(struct sta_info *sta)
426 struct ieee80211_sub_if_data *sdata = sta->sdata;
429 * Can't be a WARN_ON because it can be triggered through a race:
430 * something inserts a STA (on one CPU) without holding the RTNL
431 * and another CPU turns off the net device.
433 if (unlikely(!ieee80211_sdata_running(sdata)))
436 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
437 is_multicast_ether_addr(sta->sta.addr)))
443 static int sta_info_insert_drv_state(struct ieee80211_local *local,
444 struct ieee80211_sub_if_data *sdata,
445 struct sta_info *sta)
447 enum ieee80211_sta_state state;
450 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
451 err = drv_sta_state(local, sdata, sta, state, state + 1);
458 * Drivers using legacy sta_add/sta_remove callbacks only
459 * get uploaded set to true after sta_add is called.
461 if (!local->ops->sta_add)
462 sta->uploaded = true;
466 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
468 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
469 sta->sta.addr, state + 1, err);
473 /* unwind on error */
474 for (; state > IEEE80211_STA_NOTEXIST; state--)
475 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
481 * should be called with sta_mtx locked
482 * this function replaces the mutex lock
485 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
487 struct ieee80211_local *local = sta->local;
488 struct ieee80211_sub_if_data *sdata = sta->sdata;
489 struct station_info sinfo;
492 lockdep_assert_held(&local->sta_mtx);
494 /* check if STA exists already */
495 if (sta_info_get_bss(sdata, sta->sta.addr)) {
501 local->sta_generation++;
504 /* simplify things and don't accept BA sessions yet */
505 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
507 /* make the station visible */
508 sta_info_hash_add(local, sta);
510 list_add_rcu(&sta->list, &local->sta_list);
513 err = sta_info_insert_drv_state(local, sdata, sta);
517 set_sta_flag(sta, WLAN_STA_INSERTED);
518 /* accept BA sessions now */
519 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
521 ieee80211_recalc_min_chandef(sdata);
522 ieee80211_sta_debugfs_add(sta);
523 rate_control_add_sta_debugfs(sta);
525 memset(&sinfo, 0, sizeof(sinfo));
527 sinfo.generation = local->sta_generation;
528 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
530 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
532 /* move reference to rcu-protected */
534 mutex_unlock(&local->sta_mtx);
536 if (ieee80211_vif_is_mesh(&sdata->vif))
537 mesh_accept_plinks_update(sdata);
541 sta_info_hash_del(local, sta);
542 list_del_rcu(&sta->list);
545 __cleanup_single_sta(sta);
547 mutex_unlock(&local->sta_mtx);
552 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
554 struct ieee80211_local *local = sta->local;
559 err = sta_info_insert_check(sta);
565 mutex_lock(&local->sta_mtx);
567 err = sta_info_insert_finish(sta);
574 sta_info_free(local, sta);
578 int sta_info_insert(struct sta_info *sta)
580 int err = sta_info_insert_rcu(sta);
587 static inline void __bss_tim_set(u8 *tim, u16 id)
590 * This format has been mandated by the IEEE specifications,
591 * so this line may not be changed to use the __set_bit() format.
593 tim[id / 8] |= (1 << (id % 8));
596 static inline void __bss_tim_clear(u8 *tim, u16 id)
599 * This format has been mandated by the IEEE specifications,
600 * so this line may not be changed to use the __clear_bit() format.
602 tim[id / 8] &= ~(1 << (id % 8));
605 static inline bool __bss_tim_get(u8 *tim, u16 id)
608 * This format has been mandated by the IEEE specifications,
609 * so this line may not be changed to use the test_bit() format.
611 return tim[id / 8] & (1 << (id % 8));
614 static unsigned long ieee80211_tids_for_ac(int ac)
616 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
618 case IEEE80211_AC_VO:
619 return BIT(6) | BIT(7);
620 case IEEE80211_AC_VI:
621 return BIT(4) | BIT(5);
622 case IEEE80211_AC_BE:
623 return BIT(0) | BIT(3);
624 case IEEE80211_AC_BK:
625 return BIT(1) | BIT(2);
632 void sta_info_recalc_tim(struct sta_info *sta)
634 struct ieee80211_local *local = sta->local;
636 bool indicate_tim = false;
637 u8 ignore_for_tim = sta->sta.uapsd_queues;
641 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
642 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
643 if (WARN_ON_ONCE(!sta->sdata->bss))
646 ps = &sta->sdata->bss->ps;
648 #ifdef CONFIG_MAC80211_MESH
649 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
650 ps = &sta->sdata->u.mesh.ps;
651 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
652 id = sta->plid % (IEEE80211_MAX_AID + 1);
658 /* No need to do anything if the driver does all */
659 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
666 * If all ACs are delivery-enabled then we should build
667 * the TIM bit for all ACs anyway; if only some are then
668 * we ignore those and build the TIM bit using only the
671 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
674 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
677 if (ignore_for_tim & BIT(ac))
680 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
681 !skb_queue_empty(&sta->ps_tx_buf[ac]);
685 tids = ieee80211_tids_for_ac(ac);
688 sta->driver_buffered_tids & tids;
692 spin_lock_bh(&local->tim_lock);
694 if (indicate_tim == __bss_tim_get(ps->tim, id))
698 __bss_tim_set(ps->tim, id);
700 __bss_tim_clear(ps->tim, id);
702 if (local->ops->set_tim) {
703 local->tim_in_locked_section = true;
704 drv_set_tim(local, &sta->sta, indicate_tim);
705 local->tim_in_locked_section = false;
709 spin_unlock_bh(&local->tim_lock);
712 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
714 struct ieee80211_tx_info *info;
720 info = IEEE80211_SKB_CB(skb);
722 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
723 timeout = (sta->listen_interval *
724 sta->sdata->vif.bss_conf.beacon_int *
726 if (timeout < STA_TX_BUFFER_EXPIRE)
727 timeout = STA_TX_BUFFER_EXPIRE;
728 return time_after(jiffies, info->control.jiffies + timeout);
732 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
733 struct sta_info *sta, int ac)
739 * First check for frames that should expire on the filtered
740 * queue. Frames here were rejected by the driver and are on
741 * a separate queue to avoid reordering with normal PS-buffered
742 * frames. They also aren't accounted for right now in the
743 * total_ps_buffered counter.
746 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
747 skb = skb_peek(&sta->tx_filtered[ac]);
748 if (sta_info_buffer_expired(sta, skb))
749 skb = __skb_dequeue(&sta->tx_filtered[ac]);
752 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
755 * Frames are queued in order, so if this one
756 * hasn't expired yet we can stop testing. If
757 * we actually reached the end of the queue we
758 * also need to stop, of course.
762 ieee80211_free_txskb(&local->hw, skb);
766 * Now also check the normal PS-buffered queue, this will
767 * only find something if the filtered queue was emptied
768 * since the filtered frames are all before the normal PS
772 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
773 skb = skb_peek(&sta->ps_tx_buf[ac]);
774 if (sta_info_buffer_expired(sta, skb))
775 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
778 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
781 * frames are queued in order, so if this one
782 * hasn't expired yet (or we reached the end of
783 * the queue) we can stop testing
788 local->total_ps_buffered--;
789 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
791 ieee80211_free_txskb(&local->hw, skb);
795 * Finally, recalculate the TIM bit for this station -- it might
796 * now be clear because the station was too slow to retrieve its
799 sta_info_recalc_tim(sta);
802 * Return whether there are any frames still buffered, this is
803 * used to check whether the cleanup timer still needs to run,
804 * if there are no frames we don't need to rearm the timer.
806 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
807 skb_queue_empty(&sta->tx_filtered[ac]));
810 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
811 struct sta_info *sta)
813 bool have_buffered = false;
816 /* This is only necessary for stations on BSS/MBSS interfaces */
817 if (!sta->sdata->bss &&
818 !ieee80211_vif_is_mesh(&sta->sdata->vif))
821 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
823 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
825 return have_buffered;
828 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
830 struct ieee80211_local *local;
831 struct ieee80211_sub_if_data *sdata;
842 lockdep_assert_held(&local->sta_mtx);
845 * Before removing the station from the driver and
846 * rate control, it might still start new aggregation
847 * sessions -- block that to make sure the tear-down
848 * will be sufficient.
850 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
851 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
853 ret = sta_info_hash_del(local, sta);
857 list_del_rcu(&sta->list);
859 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
861 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
862 rcu_access_pointer(sdata->u.vlan.sta) == sta)
863 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
868 static void __sta_info_destroy_part2(struct sta_info *sta)
870 struct ieee80211_local *local = sta->local;
871 struct ieee80211_sub_if_data *sdata = sta->sdata;
875 * NOTE: This assumes at least synchronize_net() was done
876 * after _part1 and before _part2!
880 lockdep_assert_held(&local->sta_mtx);
882 /* now keys can no longer be reached */
883 ieee80211_free_sta_keys(local, sta);
888 local->sta_generation++;
890 while (sta->sta_state > IEEE80211_STA_NONE) {
891 ret = sta_info_move_state(sta, sta->sta_state - 1);
899 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
900 IEEE80211_STA_NOTEXIST);
901 WARN_ON_ONCE(ret != 0);
904 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
906 cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL);
908 rate_control_remove_sta_debugfs(sta);
909 ieee80211_sta_debugfs_remove(sta);
910 ieee80211_recalc_min_chandef(sdata);
912 cleanup_single_sta(sta);
915 int __must_check __sta_info_destroy(struct sta_info *sta)
917 int err = __sta_info_destroy_part1(sta);
924 __sta_info_destroy_part2(sta);
929 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
931 struct sta_info *sta;
934 mutex_lock(&sdata->local->sta_mtx);
935 sta = sta_info_get(sdata, addr);
936 ret = __sta_info_destroy(sta);
937 mutex_unlock(&sdata->local->sta_mtx);
942 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
945 struct sta_info *sta;
948 mutex_lock(&sdata->local->sta_mtx);
949 sta = sta_info_get_bss(sdata, addr);
950 ret = __sta_info_destroy(sta);
951 mutex_unlock(&sdata->local->sta_mtx);
956 static void sta_info_cleanup(unsigned long data)
958 struct ieee80211_local *local = (struct ieee80211_local *) data;
959 struct sta_info *sta;
960 bool timer_needed = false;
963 list_for_each_entry_rcu(sta, &local->sta_list, list)
964 if (sta_info_cleanup_expire_buffered(local, sta))
968 if (local->quiescing)
974 mod_timer(&local->sta_cleanup,
975 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
978 void sta_info_init(struct ieee80211_local *local)
980 spin_lock_init(&local->tim_lock);
981 mutex_init(&local->sta_mtx);
982 INIT_LIST_HEAD(&local->sta_list);
984 setup_timer(&local->sta_cleanup, sta_info_cleanup,
985 (unsigned long)local);
988 void sta_info_stop(struct ieee80211_local *local)
990 del_timer_sync(&local->sta_cleanup);
994 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
996 struct ieee80211_local *local = sdata->local;
997 struct sta_info *sta, *tmp;
998 LIST_HEAD(free_list);
1003 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1004 WARN_ON(vlans && !sdata->bss);
1006 mutex_lock(&local->sta_mtx);
1007 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1008 if (sdata == sta->sdata ||
1009 (vlans && sdata->bss == sta->sdata->bss)) {
1010 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1011 list_add(&sta->free_list, &free_list);
1016 if (!list_empty(&free_list)) {
1018 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1019 __sta_info_destroy_part2(sta);
1021 mutex_unlock(&local->sta_mtx);
1026 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1027 unsigned long exp_time)
1029 struct ieee80211_local *local = sdata->local;
1030 struct sta_info *sta, *tmp;
1032 mutex_lock(&local->sta_mtx);
1034 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1035 if (sdata != sta->sdata)
1038 if (time_after(jiffies, sta->last_rx + exp_time)) {
1039 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1042 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1043 test_sta_flag(sta, WLAN_STA_PS_STA))
1044 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1046 WARN_ON(__sta_info_destroy(sta));
1050 mutex_unlock(&local->sta_mtx);
1053 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1055 const u8 *localaddr)
1057 struct sta_info *sta, *nxt;
1060 * Just return a random station if localaddr is NULL
1061 * ... first in list.
1063 for_each_sta_info(hw_to_local(hw), addr, sta, nxt) {
1065 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1074 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1076 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1079 struct sta_info *sta;
1084 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1093 EXPORT_SYMBOL(ieee80211_find_sta);
1095 /* powersave support code */
1096 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1098 struct ieee80211_sub_if_data *sdata = sta->sdata;
1099 struct ieee80211_local *local = sdata->local;
1100 struct sk_buff_head pending;
1101 int filtered = 0, buffered = 0, ac;
1102 unsigned long flags;
1105 if (sdata->vif.type == NL80211_IFTYPE_AP ||
1106 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1107 ps = &sdata->bss->ps;
1108 else if (ieee80211_vif_is_mesh(&sdata->vif))
1109 ps = &sdata->u.mesh.ps;
1113 clear_sta_flag(sta, WLAN_STA_SP);
1115 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1116 sta->driver_buffered_tids = 0;
1118 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1119 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1121 skb_queue_head_init(&pending);
1123 /* sync with ieee80211_tx_h_unicast_ps_buf */
1124 spin_lock(&sta->ps_lock);
1125 /* Send all buffered frames to the station */
1126 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1127 int count = skb_queue_len(&pending), tmp;
1129 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1130 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1131 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1132 tmp = skb_queue_len(&pending);
1133 filtered += tmp - count;
1136 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1137 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1138 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1139 tmp = skb_queue_len(&pending);
1140 buffered += tmp - count;
1143 ieee80211_add_pending_skbs(local, &pending);
1144 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1145 clear_sta_flag(sta, WLAN_STA_PS_STA);
1146 spin_unlock(&sta->ps_lock);
1148 atomic_dec(&ps->num_sta_ps);
1150 /* This station just woke up and isn't aware of our SMPS state */
1151 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1152 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1153 sdata->smps_mode) &&
1154 sta->known_smps_mode != sdata->bss->req_smps &&
1155 sta_info_tx_streams(sta) != 1) {
1157 "%pM just woke up and MIMO capable - update SMPS\n",
1159 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1161 sdata->vif.bss_conf.bssid);
1164 local->total_ps_buffered -= buffered;
1166 sta_info_recalc_tim(sta);
1169 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1170 sta->sta.addr, sta->sta.aid, filtered, buffered);
1173 static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
1174 struct sta_info *sta, int tid,
1175 enum ieee80211_frame_release_type reason,
1178 struct ieee80211_local *local = sdata->local;
1179 struct ieee80211_qos_hdr *nullfunc;
1180 struct sk_buff *skb;
1181 int size = sizeof(*nullfunc);
1183 bool qos = test_sta_flag(sta, WLAN_STA_WME);
1184 struct ieee80211_tx_info *info;
1185 struct ieee80211_chanctx_conf *chanctx_conf;
1188 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1189 IEEE80211_STYPE_QOS_NULLFUNC |
1190 IEEE80211_FCTL_FROMDS);
1193 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1194 IEEE80211_STYPE_NULLFUNC |
1195 IEEE80211_FCTL_FROMDS);
1198 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1202 skb_reserve(skb, local->hw.extra_tx_headroom);
1204 nullfunc = (void *) skb_put(skb, size);
1205 nullfunc->frame_control = fc;
1206 nullfunc->duration_id = 0;
1207 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1208 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1209 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1210 nullfunc->seq_ctrl = 0;
1212 skb->priority = tid;
1213 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1215 nullfunc->qos_ctrl = cpu_to_le16(tid);
1217 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
1218 nullfunc->qos_ctrl |=
1219 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1222 info = IEEE80211_SKB_CB(skb);
1225 * Tell TX path to send this frame even though the
1226 * STA may still remain is PS mode after this frame
1227 * exchange. Also set EOSP to indicate this packet
1228 * ends the poll/service period.
1230 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1231 IEEE80211_TX_CTL_PS_RESPONSE |
1232 IEEE80211_TX_STATUS_EOSP |
1233 IEEE80211_TX_CTL_REQ_TX_STATUS;
1236 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1239 skb->dev = sdata->dev;
1242 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1243 if (WARN_ON(!chanctx_conf)) {
1249 ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band);
1253 static int find_highest_prio_tid(unsigned long tids)
1255 /* lower 3 TIDs aren't ordered perfectly */
1257 return fls(tids) - 1;
1258 /* TID 0 is BE just like TID 3 */
1261 return fls(tids) - 1;
1265 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1266 int n_frames, u8 ignored_acs,
1267 enum ieee80211_frame_release_type reason)
1269 struct ieee80211_sub_if_data *sdata = sta->sdata;
1270 struct ieee80211_local *local = sdata->local;
1271 bool more_data = false;
1273 unsigned long driver_release_tids = 0;
1274 struct sk_buff_head frames;
1276 /* Service or PS-Poll period starts */
1277 set_sta_flag(sta, WLAN_STA_SP);
1279 __skb_queue_head_init(&frames);
1281 /* Get response frame(s) and more data bit for the last one. */
1282 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1285 if (ignored_acs & BIT(ac))
1288 tids = ieee80211_tids_for_ac(ac);
1290 /* if we already have frames from software, then we can't also
1291 * release from hardware queues
1293 if (skb_queue_empty(&frames))
1294 driver_release_tids |= sta->driver_buffered_tids & tids;
1296 if (driver_release_tids) {
1297 /* If the driver has data on more than one TID then
1298 * certainly there's more data if we release just a
1299 * single frame now (from a single TID). This will
1300 * only happen for PS-Poll.
1302 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1303 hweight16(driver_release_tids) > 1) {
1305 driver_release_tids =
1306 BIT(find_highest_prio_tid(
1307 driver_release_tids));
1311 struct sk_buff *skb;
1313 while (n_frames > 0) {
1314 skb = skb_dequeue(&sta->tx_filtered[ac]);
1317 &sta->ps_tx_buf[ac]);
1319 local->total_ps_buffered--;
1324 __skb_queue_tail(&frames, skb);
1328 /* If we have more frames buffered on this AC, then set the
1329 * more-data bit and abort the loop since we can't send more
1330 * data from other ACs before the buffered frames from this.
1332 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1333 !skb_queue_empty(&sta->ps_tx_buf[ac])) {
1339 if (skb_queue_empty(&frames) && !driver_release_tids) {
1343 * For PS-Poll, this can only happen due to a race condition
1344 * when we set the TIM bit and the station notices it, but
1345 * before it can poll for the frame we expire it.
1347 * For uAPSD, this is said in the standard (11.2.1.5 h):
1348 * At each unscheduled SP for a non-AP STA, the AP shall
1349 * attempt to transmit at least one MSDU or MMPDU, but no
1350 * more than the value specified in the Max SP Length field
1351 * in the QoS Capability element from delivery-enabled ACs,
1352 * that are destined for the non-AP STA.
1354 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1357 /* This will evaluate to 1, 3, 5 or 7. */
1358 tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
1360 ieee80211_send_null_response(sdata, sta, tid, reason, true);
1361 } else if (!driver_release_tids) {
1362 struct sk_buff_head pending;
1363 struct sk_buff *skb;
1366 bool need_null = false;
1368 skb_queue_head_init(&pending);
1370 while ((skb = __skb_dequeue(&frames))) {
1371 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1372 struct ieee80211_hdr *hdr = (void *) skb->data;
1378 * Tell TX path to send this frame even though the
1379 * STA may still remain is PS mode after this frame
1382 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1383 IEEE80211_TX_CTL_PS_RESPONSE;
1386 * Use MoreData flag to indicate whether there are
1387 * more buffered frames for this STA
1389 if (more_data || !skb_queue_empty(&frames))
1390 hdr->frame_control |=
1391 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1393 hdr->frame_control &=
1394 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1396 if (ieee80211_is_data_qos(hdr->frame_control) ||
1397 ieee80211_is_qos_nullfunc(hdr->frame_control))
1398 qoshdr = ieee80211_get_qos_ctl(hdr);
1400 tids |= BIT(skb->priority);
1402 __skb_queue_tail(&pending, skb);
1404 /* end service period after last frame or add one */
1405 if (!skb_queue_empty(&frames))
1408 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1409 /* for PS-Poll, there's only one frame */
1410 info->flags |= IEEE80211_TX_STATUS_EOSP |
1411 IEEE80211_TX_CTL_REQ_TX_STATUS;
1415 /* For uAPSD, things are a bit more complicated. If the
1416 * last frame has a QoS header (i.e. is a QoS-data or
1417 * QoS-nulldata frame) then just set the EOSP bit there
1419 * If the frame doesn't have a QoS header (which means
1420 * it should be a bufferable MMPDU) then we can't set
1421 * the EOSP bit in the QoS header; add a QoS-nulldata
1422 * frame to the list to send it after the MMPDU.
1424 * Note that this code is only in the mac80211-release
1425 * code path, we assume that the driver will not buffer
1426 * anything but QoS-data frames, or if it does, will
1427 * create the QoS-nulldata frame by itself if needed.
1429 * Cf. 802.11-2012 10.2.1.10 (c).
1432 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1434 info->flags |= IEEE80211_TX_STATUS_EOSP |
1435 IEEE80211_TX_CTL_REQ_TX_STATUS;
1437 /* The standard isn't completely clear on this
1438 * as it says the more-data bit should be set
1439 * if there are more BUs. The QoS-Null frame
1440 * we're about to send isn't buffered yet, we
1441 * only create it below, but let's pretend it
1442 * was buffered just in case some clients only
1443 * expect more-data=0 when eosp=1.
1445 hdr->frame_control |=
1446 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1453 drv_allow_buffered_frames(local, sta, tids, num,
1456 ieee80211_add_pending_skbs(local, &pending);
1459 ieee80211_send_null_response(
1460 sdata, sta, find_highest_prio_tid(tids),
1463 sta_info_recalc_tim(sta);
1466 * We need to release a frame that is buffered somewhere in the
1467 * driver ... it'll have to handle that.
1468 * Note that the driver also has to check the number of frames
1469 * on the TIDs we're releasing from - if there are more than
1470 * n_frames it has to set the more-data bit (if we didn't ask
1471 * it to set it anyway due to other buffered frames); if there
1472 * are fewer than n_frames it has to make sure to adjust that
1473 * to allow the service period to end properly.
1475 drv_release_buffered_frames(local, sta, driver_release_tids,
1476 n_frames, reason, more_data);
1479 * Note that we don't recalculate the TIM bit here as it would
1480 * most likely have no effect at all unless the driver told us
1481 * that the TID(s) became empty before returning here from the
1483 * Either way, however, when the driver tells us that the TID(s)
1484 * became empty we'll do the TIM recalculation.
1489 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1491 u8 ignore_for_response = sta->sta.uapsd_queues;
1494 * If all ACs are delivery-enabled then we should reply
1495 * from any of them, if only some are enabled we reply
1496 * only from the non-enabled ones.
1498 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1499 ignore_for_response = 0;
1501 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1502 IEEE80211_FRAME_RELEASE_PSPOLL);
1505 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1507 int n_frames = sta->sta.max_sp;
1508 u8 delivery_enabled = sta->sta.uapsd_queues;
1511 * If we ever grow support for TSPEC this might happen if
1512 * the TSPEC update from hostapd comes in between a trigger
1513 * frame setting WLAN_STA_UAPSD in the RX path and this
1514 * actually getting called.
1516 if (!delivery_enabled)
1519 switch (sta->sta.max_sp) {
1530 /* XXX: what is a good value? */
1535 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1536 IEEE80211_FRAME_RELEASE_UAPSD);
1539 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1540 struct ieee80211_sta *pubsta, bool block)
1542 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1544 trace_api_sta_block_awake(sta->local, pubsta, block);
1547 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1548 else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1549 ieee80211_queue_work(hw, &sta->drv_unblock_wk);
1551 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1553 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1555 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1556 struct ieee80211_local *local = sta->local;
1558 trace_api_eosp(local, pubsta);
1560 clear_sta_flag(sta, WLAN_STA_SP);
1562 EXPORT_SYMBOL(ieee80211_sta_eosp);
1564 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1565 u8 tid, bool buffered)
1567 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1569 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1572 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1575 set_bit(tid, &sta->driver_buffered_tids);
1577 clear_bit(tid, &sta->driver_buffered_tids);
1579 sta_info_recalc_tim(sta);
1581 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1583 int sta_info_move_state(struct sta_info *sta,
1584 enum ieee80211_sta_state new_state)
1588 if (sta->sta_state == new_state)
1591 /* check allowed transitions first */
1593 switch (new_state) {
1594 case IEEE80211_STA_NONE:
1595 if (sta->sta_state != IEEE80211_STA_AUTH)
1598 case IEEE80211_STA_AUTH:
1599 if (sta->sta_state != IEEE80211_STA_NONE &&
1600 sta->sta_state != IEEE80211_STA_ASSOC)
1603 case IEEE80211_STA_ASSOC:
1604 if (sta->sta_state != IEEE80211_STA_AUTH &&
1605 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1608 case IEEE80211_STA_AUTHORIZED:
1609 if (sta->sta_state != IEEE80211_STA_ASSOC)
1613 WARN(1, "invalid state %d", new_state);
1617 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1618 sta->sta.addr, new_state);
1621 * notify the driver before the actual changes so it can
1622 * fail the transition
1624 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1625 int err = drv_sta_state(sta->local, sta->sdata, sta,
1626 sta->sta_state, new_state);
1631 /* reflect the change in all state variables */
1633 switch (new_state) {
1634 case IEEE80211_STA_NONE:
1635 if (sta->sta_state == IEEE80211_STA_AUTH)
1636 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1638 case IEEE80211_STA_AUTH:
1639 if (sta->sta_state == IEEE80211_STA_NONE)
1640 set_bit(WLAN_STA_AUTH, &sta->_flags);
1641 else if (sta->sta_state == IEEE80211_STA_ASSOC)
1642 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1644 case IEEE80211_STA_ASSOC:
1645 if (sta->sta_state == IEEE80211_STA_AUTH) {
1646 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1647 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1648 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1649 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1650 !sta->sdata->u.vlan.sta))
1651 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1652 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1655 case IEEE80211_STA_AUTHORIZED:
1656 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1657 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1658 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1659 !sta->sdata->u.vlan.sta))
1660 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1661 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1668 sta->sta_state = new_state;
1673 u8 sta_info_tx_streams(struct sta_info *sta)
1675 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1678 if (!sta->sta.ht_cap.ht_supported)
1681 if (sta->sta.vht_cap.vht_supported) {
1684 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1686 for (i = 7; i >= 0; i--)
1687 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1688 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1692 if (ht_cap->mcs.rx_mask[3])
1694 else if (ht_cap->mcs.rx_mask[2])
1696 else if (ht_cap->mcs.rx_mask[1])
1701 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1704 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1705 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;