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 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
104 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
105 ps = &sdata->bss->ps;
106 else if (ieee80211_vif_is_mesh(&sdata->vif))
107 ps = &sdata->u.mesh.ps;
111 clear_sta_flag(sta, WLAN_STA_PS_STA);
113 atomic_dec(&ps->num_sta_ps);
114 sta_info_recalc_tim(sta);
117 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
118 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
119 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
120 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
123 if (ieee80211_vif_is_mesh(&sdata->vif))
124 mesh_sta_cleanup(sta);
126 cancel_work_sync(&sta->drv_unblock_wk);
129 * Destroy aggregation state here. It would be nice to wait for the
130 * driver to finish aggregation stop and then clean up, but for now
131 * drivers have to handle aggregation stop being requested, followed
132 * directly by station destruction.
134 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
135 kfree(sta->ampdu_mlme.tid_start_tx[i]);
136 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
139 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
144 static void cleanup_single_sta(struct sta_info *sta)
146 struct ieee80211_sub_if_data *sdata = sta->sdata;
147 struct ieee80211_local *local = sdata->local;
149 __cleanup_single_sta(sta);
150 sta_info_free(local, sta);
153 /* protected by RCU */
154 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
157 struct ieee80211_local *local = sdata->local;
158 struct sta_info *sta;
160 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
161 lockdep_is_held(&local->sta_mtx));
163 if (sta->sdata == sdata &&
164 ether_addr_equal(sta->sta.addr, addr))
166 sta = rcu_dereference_check(sta->hnext,
167 lockdep_is_held(&local->sta_mtx));
173 * Get sta info either from the specified interface
174 * or from one of its vlans
176 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
179 struct ieee80211_local *local = sdata->local;
180 struct sta_info *sta;
182 sta = rcu_dereference_check(local->sta_hash[STA_HASH(addr)],
183 lockdep_is_held(&local->sta_mtx));
185 if ((sta->sdata == sdata ||
186 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) &&
187 ether_addr_equal(sta->sta.addr, addr))
189 sta = rcu_dereference_check(sta->hnext,
190 lockdep_is_held(&local->sta_mtx));
195 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
198 struct ieee80211_local *local = sdata->local;
199 struct sta_info *sta;
202 list_for_each_entry_rcu(sta, &local->sta_list, list) {
203 if (sdata != sta->sdata)
216 * sta_info_free - free STA
218 * @local: pointer to the global information
219 * @sta: STA info to free
221 * This function must undo everything done by sta_info_alloc()
222 * that may happen before sta_info_insert(). It may only be
223 * called when sta_info_insert() has not been attempted (and
224 * if that fails, the station is freed anyway.)
226 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
231 rate_control_free_sta(sta);
234 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
235 kfree(sta->tx_lat[i].bins);
239 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
244 /* Caller must hold local->sta_mtx */
245 static void sta_info_hash_add(struct ieee80211_local *local,
246 struct sta_info *sta)
248 lockdep_assert_held(&local->sta_mtx);
249 sta->hnext = local->sta_hash[STA_HASH(sta->sta.addr)];
250 rcu_assign_pointer(local->sta_hash[STA_HASH(sta->sta.addr)], sta);
253 static void sta_unblock(struct work_struct *wk)
255 struct sta_info *sta;
257 sta = container_of(wk, struct sta_info, drv_unblock_wk);
262 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
264 ieee80211_sta_ps_deliver_wakeup(sta);
266 } else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL)) {
267 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
270 ieee80211_sta_ps_deliver_poll_response(sta);
272 } else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD)) {
273 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
276 ieee80211_sta_ps_deliver_uapsd(sta);
279 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
282 static int sta_prepare_rate_control(struct ieee80211_local *local,
283 struct sta_info *sta, gfp_t gfp)
285 if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
288 sta->rate_ctrl = local->rate_ctrl;
289 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
291 if (!sta->rate_ctrl_priv)
297 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
298 const u8 *addr, gfp_t gfp)
300 struct ieee80211_local *local = sdata->local;
301 struct sta_info *sta;
302 struct timespec uptime;
303 struct ieee80211_tx_latency_bin_ranges *tx_latency;
306 sta = kzalloc(sizeof(*sta) + local->hw.sta_data_size, gfp);
311 tx_latency = rcu_dereference(local->tx_latency);
312 /* init stations Tx latency statistics && TID bins */
314 sta->tx_lat = kzalloc(IEEE80211_NUM_TIDS *
315 sizeof(struct ieee80211_tx_latency_stat),
322 if (tx_latency->n_ranges) {
323 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
324 /* size of bins is size of the ranges +1 */
325 sta->tx_lat[i].bin_count =
326 tx_latency->n_ranges + 1;
327 sta->tx_lat[i].bins =
328 kcalloc(sta->tx_lat[i].bin_count,
329 sizeof(u32), GFP_ATOMIC);
330 if (!sta->tx_lat[i].bins) {
339 spin_lock_init(&sta->lock);
340 spin_lock_init(&sta->ps_lock);
341 INIT_WORK(&sta->drv_unblock_wk, sta_unblock);
342 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
343 mutex_init(&sta->ampdu_mlme.mtx);
344 #ifdef CONFIG_MAC80211_MESH
345 if (ieee80211_vif_is_mesh(&sdata->vif) &&
346 !sdata->u.mesh.user_mpm)
347 init_timer(&sta->plink_timer);
348 sta->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
351 memcpy(sta->sta.addr, addr, ETH_ALEN);
354 sta->last_rx = jiffies;
356 sta->sta_state = IEEE80211_STA_NONE;
358 do_posix_clock_monotonic_gettime(&uptime);
359 sta->last_connected = uptime.tv_sec;
360 ewma_init(&sta->avg_signal, 1024, 8);
361 for (i = 0; i < ARRAY_SIZE(sta->chain_signal_avg); i++)
362 ewma_init(&sta->chain_signal_avg[i], 1024, 8);
364 if (sta_prepare_rate_control(local, sta, gfp))
367 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
369 * timer_to_tid must be initialized with identity mapping
370 * to enable session_timer's data differentiation. See
371 * sta_rx_agg_session_timer_expired for usage.
373 sta->timer_to_tid[i] = i;
375 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
376 skb_queue_head_init(&sta->ps_tx_buf[i]);
377 skb_queue_head_init(&sta->tx_filtered[i]);
380 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
381 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
383 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
384 if (sdata->vif.type == NL80211_IFTYPE_AP ||
385 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
386 struct ieee80211_supported_band *sband =
387 local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
388 u8 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
389 IEEE80211_HT_CAP_SM_PS_SHIFT;
391 * Assume that hostapd advertises our caps in the beacon and
392 * this is the known_smps_mode for a station that just assciated
395 case WLAN_HT_SMPS_CONTROL_DISABLED:
396 sta->known_smps_mode = IEEE80211_SMPS_OFF;
398 case WLAN_HT_SMPS_CONTROL_STATIC:
399 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
401 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
402 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
409 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
414 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
415 kfree(sta->tx_lat[i].bins);
422 static int sta_info_insert_check(struct sta_info *sta)
424 struct ieee80211_sub_if_data *sdata = sta->sdata;
427 * Can't be a WARN_ON because it can be triggered through a race:
428 * something inserts a STA (on one CPU) without holding the RTNL
429 * and another CPU turns off the net device.
431 if (unlikely(!ieee80211_sdata_running(sdata)))
434 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
435 is_multicast_ether_addr(sta->sta.addr)))
441 static int sta_info_insert_drv_state(struct ieee80211_local *local,
442 struct ieee80211_sub_if_data *sdata,
443 struct sta_info *sta)
445 enum ieee80211_sta_state state;
448 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
449 err = drv_sta_state(local, sdata, sta, state, state + 1);
456 * Drivers using legacy sta_add/sta_remove callbacks only
457 * get uploaded set to true after sta_add is called.
459 if (!local->ops->sta_add)
460 sta->uploaded = true;
464 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
466 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
467 sta->sta.addr, state + 1, err);
471 /* unwind on error */
472 for (; state > IEEE80211_STA_NOTEXIST; state--)
473 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
479 * should be called with sta_mtx locked
480 * this function replaces the mutex lock
483 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
485 struct ieee80211_local *local = sta->local;
486 struct ieee80211_sub_if_data *sdata = sta->sdata;
487 struct station_info sinfo;
490 lockdep_assert_held(&local->sta_mtx);
492 /* check if STA exists already */
493 if (sta_info_get_bss(sdata, sta->sta.addr)) {
499 local->sta_generation++;
502 /* simplify things and don't accept BA sessions yet */
503 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
505 /* make the station visible */
506 sta_info_hash_add(local, sta);
508 list_add_rcu(&sta->list, &local->sta_list);
511 err = sta_info_insert_drv_state(local, sdata, sta);
515 set_sta_flag(sta, WLAN_STA_INSERTED);
516 /* accept BA sessions now */
517 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
519 ieee80211_recalc_min_chandef(sdata);
520 ieee80211_sta_debugfs_add(sta);
521 rate_control_add_sta_debugfs(sta);
523 memset(&sinfo, 0, sizeof(sinfo));
525 sinfo.generation = local->sta_generation;
526 cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);
528 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
530 /* move reference to rcu-protected */
532 mutex_unlock(&local->sta_mtx);
534 if (ieee80211_vif_is_mesh(&sdata->vif))
535 mesh_accept_plinks_update(sdata);
539 sta_info_hash_del(local, sta);
540 list_del_rcu(&sta->list);
543 __cleanup_single_sta(sta);
545 mutex_unlock(&local->sta_mtx);
550 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
552 struct ieee80211_local *local = sta->local;
557 err = sta_info_insert_check(sta);
563 mutex_lock(&local->sta_mtx);
565 err = sta_info_insert_finish(sta);
572 sta_info_free(local, sta);
576 int sta_info_insert(struct sta_info *sta)
578 int err = sta_info_insert_rcu(sta);
585 static inline void __bss_tim_set(u8 *tim, u16 id)
588 * This format has been mandated by the IEEE specifications,
589 * so this line may not be changed to use the __set_bit() format.
591 tim[id / 8] |= (1 << (id % 8));
594 static inline void __bss_tim_clear(u8 *tim, u16 id)
597 * This format has been mandated by the IEEE specifications,
598 * so this line may not be changed to use the __clear_bit() format.
600 tim[id / 8] &= ~(1 << (id % 8));
603 static inline bool __bss_tim_get(u8 *tim, u16 id)
606 * This format has been mandated by the IEEE specifications,
607 * so this line may not be changed to use the test_bit() format.
609 return tim[id / 8] & (1 << (id % 8));
612 static unsigned long ieee80211_tids_for_ac(int ac)
614 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
616 case IEEE80211_AC_VO:
617 return BIT(6) | BIT(7);
618 case IEEE80211_AC_VI:
619 return BIT(4) | BIT(5);
620 case IEEE80211_AC_BE:
621 return BIT(0) | BIT(3);
622 case IEEE80211_AC_BK:
623 return BIT(1) | BIT(2);
630 void sta_info_recalc_tim(struct sta_info *sta)
632 struct ieee80211_local *local = sta->local;
634 bool indicate_tim = false;
635 u8 ignore_for_tim = sta->sta.uapsd_queues;
639 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
640 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
641 if (WARN_ON_ONCE(!sta->sdata->bss))
644 ps = &sta->sdata->bss->ps;
646 #ifdef CONFIG_MAC80211_MESH
647 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
648 ps = &sta->sdata->u.mesh.ps;
649 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
650 id = sta->plid % (IEEE80211_MAX_AID + 1);
656 /* No need to do anything if the driver does all */
657 if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
664 * If all ACs are delivery-enabled then we should build
665 * the TIM bit for all ACs anyway; if only some are then
666 * we ignore those and build the TIM bit using only the
669 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
672 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
675 if (ignore_for_tim & BIT(ac))
678 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
679 !skb_queue_empty(&sta->ps_tx_buf[ac]);
683 tids = ieee80211_tids_for_ac(ac);
686 sta->driver_buffered_tids & tids;
690 spin_lock_bh(&local->tim_lock);
692 if (indicate_tim == __bss_tim_get(ps->tim, id))
696 __bss_tim_set(ps->tim, id);
698 __bss_tim_clear(ps->tim, id);
700 if (local->ops->set_tim) {
701 local->tim_in_locked_section = true;
702 drv_set_tim(local, &sta->sta, indicate_tim);
703 local->tim_in_locked_section = false;
707 spin_unlock_bh(&local->tim_lock);
710 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
712 struct ieee80211_tx_info *info;
718 info = IEEE80211_SKB_CB(skb);
720 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
721 timeout = (sta->listen_interval *
722 sta->sdata->vif.bss_conf.beacon_int *
724 if (timeout < STA_TX_BUFFER_EXPIRE)
725 timeout = STA_TX_BUFFER_EXPIRE;
726 return time_after(jiffies, info->control.jiffies + timeout);
730 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
731 struct sta_info *sta, int ac)
737 * First check for frames that should expire on the filtered
738 * queue. Frames here were rejected by the driver and are on
739 * a separate queue to avoid reordering with normal PS-buffered
740 * frames. They also aren't accounted for right now in the
741 * total_ps_buffered counter.
744 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
745 skb = skb_peek(&sta->tx_filtered[ac]);
746 if (sta_info_buffer_expired(sta, skb))
747 skb = __skb_dequeue(&sta->tx_filtered[ac]);
750 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
753 * Frames are queued in order, so if this one
754 * hasn't expired yet we can stop testing. If
755 * we actually reached the end of the queue we
756 * also need to stop, of course.
760 ieee80211_free_txskb(&local->hw, skb);
764 * Now also check the normal PS-buffered queue, this will
765 * only find something if the filtered queue was emptied
766 * since the filtered frames are all before the normal PS
770 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
771 skb = skb_peek(&sta->ps_tx_buf[ac]);
772 if (sta_info_buffer_expired(sta, skb))
773 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
776 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
779 * frames are queued in order, so if this one
780 * hasn't expired yet (or we reached the end of
781 * the queue) we can stop testing
786 local->total_ps_buffered--;
787 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
789 ieee80211_free_txskb(&local->hw, skb);
793 * Finally, recalculate the TIM bit for this station -- it might
794 * now be clear because the station was too slow to retrieve its
797 sta_info_recalc_tim(sta);
800 * Return whether there are any frames still buffered, this is
801 * used to check whether the cleanup timer still needs to run,
802 * if there are no frames we don't need to rearm the timer.
804 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
805 skb_queue_empty(&sta->tx_filtered[ac]));
808 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
809 struct sta_info *sta)
811 bool have_buffered = false;
814 /* This is only necessary for stations on BSS/MBSS interfaces */
815 if (!sta->sdata->bss &&
816 !ieee80211_vif_is_mesh(&sta->sdata->vif))
819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
821 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
823 return have_buffered;
826 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
828 struct ieee80211_local *local;
829 struct ieee80211_sub_if_data *sdata;
840 lockdep_assert_held(&local->sta_mtx);
843 * Before removing the station from the driver and
844 * rate control, it might still start new aggregation
845 * sessions -- block that to make sure the tear-down
846 * will be sufficient.
848 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
849 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
851 ret = sta_info_hash_del(local, sta);
855 list_del_rcu(&sta->list);
857 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
859 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
860 rcu_access_pointer(sdata->u.vlan.sta) == sta)
861 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
866 static void __sta_info_destroy_part2(struct sta_info *sta)
868 struct ieee80211_local *local = sta->local;
869 struct ieee80211_sub_if_data *sdata = sta->sdata;
873 * NOTE: This assumes at least synchronize_net() was done
874 * after _part1 and before _part2!
878 lockdep_assert_held(&local->sta_mtx);
880 /* now keys can no longer be reached */
881 ieee80211_free_sta_keys(local, sta);
886 local->sta_generation++;
888 while (sta->sta_state > IEEE80211_STA_NONE) {
889 ret = sta_info_move_state(sta, sta->sta_state - 1);
897 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
898 IEEE80211_STA_NOTEXIST);
899 WARN_ON_ONCE(ret != 0);
902 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
904 cfg80211_del_sta(sdata->dev, sta->sta.addr, GFP_KERNEL);
906 rate_control_remove_sta_debugfs(sta);
907 ieee80211_sta_debugfs_remove(sta);
908 ieee80211_recalc_min_chandef(sdata);
910 cleanup_single_sta(sta);
913 int __must_check __sta_info_destroy(struct sta_info *sta)
915 int err = __sta_info_destroy_part1(sta);
922 __sta_info_destroy_part2(sta);
927 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
929 struct sta_info *sta;
932 mutex_lock(&sdata->local->sta_mtx);
933 sta = sta_info_get(sdata, addr);
934 ret = __sta_info_destroy(sta);
935 mutex_unlock(&sdata->local->sta_mtx);
940 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
943 struct sta_info *sta;
946 mutex_lock(&sdata->local->sta_mtx);
947 sta = sta_info_get_bss(sdata, addr);
948 ret = __sta_info_destroy(sta);
949 mutex_unlock(&sdata->local->sta_mtx);
954 static void sta_info_cleanup(unsigned long data)
956 struct ieee80211_local *local = (struct ieee80211_local *) data;
957 struct sta_info *sta;
958 bool timer_needed = false;
961 list_for_each_entry_rcu(sta, &local->sta_list, list)
962 if (sta_info_cleanup_expire_buffered(local, sta))
966 if (local->quiescing)
972 mod_timer(&local->sta_cleanup,
973 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
976 void sta_info_init(struct ieee80211_local *local)
978 spin_lock_init(&local->tim_lock);
979 mutex_init(&local->sta_mtx);
980 INIT_LIST_HEAD(&local->sta_list);
982 setup_timer(&local->sta_cleanup, sta_info_cleanup,
983 (unsigned long)local);
986 void sta_info_stop(struct ieee80211_local *local)
988 del_timer_sync(&local->sta_cleanup);
992 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
994 struct ieee80211_local *local = sdata->local;
995 struct sta_info *sta, *tmp;
996 LIST_HEAD(free_list);
1001 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1002 WARN_ON(vlans && !sdata->bss);
1004 mutex_lock(&local->sta_mtx);
1005 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1006 if (sdata == sta->sdata ||
1007 (vlans && sdata->bss == sta->sdata->bss)) {
1008 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1009 list_add(&sta->free_list, &free_list);
1014 if (!list_empty(&free_list)) {
1016 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1017 __sta_info_destroy_part2(sta);
1019 mutex_unlock(&local->sta_mtx);
1024 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1025 unsigned long exp_time)
1027 struct ieee80211_local *local = sdata->local;
1028 struct sta_info *sta, *tmp;
1030 mutex_lock(&local->sta_mtx);
1032 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1033 if (sdata != sta->sdata)
1036 if (time_after(jiffies, sta->last_rx + exp_time)) {
1037 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1040 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1041 test_sta_flag(sta, WLAN_STA_PS_STA))
1042 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1044 WARN_ON(__sta_info_destroy(sta));
1048 mutex_unlock(&local->sta_mtx);
1051 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1053 const u8 *localaddr)
1055 struct sta_info *sta, *nxt;
1058 * Just return a random station if localaddr is NULL
1059 * ... first in list.
1061 for_each_sta_info(hw_to_local(hw), addr, sta, nxt) {
1063 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1072 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1074 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1077 struct sta_info *sta;
1082 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1091 EXPORT_SYMBOL(ieee80211_find_sta);
1093 static void clear_sta_ps_flags(void *_sta)
1095 struct sta_info *sta = _sta;
1096 struct ieee80211_sub_if_data *sdata = sta->sdata;
1099 if (sdata->vif.type == NL80211_IFTYPE_AP ||
1100 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1101 ps = &sdata->bss->ps;
1102 else if (ieee80211_vif_is_mesh(&sdata->vif))
1103 ps = &sdata->u.mesh.ps;
1107 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1108 if (test_and_clear_sta_flag(sta, WLAN_STA_PS_STA))
1109 atomic_dec(&ps->num_sta_ps);
1112 /* powersave support code */
1113 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1115 struct ieee80211_sub_if_data *sdata = sta->sdata;
1116 struct ieee80211_local *local = sdata->local;
1117 struct sk_buff_head pending;
1118 int filtered = 0, buffered = 0, ac;
1119 unsigned long flags;
1121 clear_sta_flag(sta, WLAN_STA_SP);
1123 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1124 sta->driver_buffered_tids = 0;
1126 if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
1127 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1129 skb_queue_head_init(&pending);
1131 /* sync with ieee80211_tx_h_unicast_ps_buf */
1132 spin_lock(&sta->ps_lock);
1133 /* Send all buffered frames to the station */
1134 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1135 int count = skb_queue_len(&pending), tmp;
1137 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1138 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1139 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1140 tmp = skb_queue_len(&pending);
1141 filtered += tmp - count;
1144 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1145 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1146 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1147 tmp = skb_queue_len(&pending);
1148 buffered += tmp - count;
1151 ieee80211_add_pending_skbs_fn(local, &pending, clear_sta_ps_flags, sta);
1152 spin_unlock(&sta->ps_lock);
1154 /* This station just woke up and isn't aware of our SMPS state */
1155 if (!ieee80211_smps_is_restrictive(sta->known_smps_mode,
1156 sdata->smps_mode) &&
1157 sta->known_smps_mode != sdata->bss->req_smps &&
1158 sta_info_tx_streams(sta) != 1) {
1160 "%pM just woke up and MIMO capable - update SMPS\n",
1162 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1164 sdata->vif.bss_conf.bssid);
1167 local->total_ps_buffered -= buffered;
1169 sta_info_recalc_tim(sta);
1172 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1173 sta->sta.addr, sta->sta.aid, filtered, buffered);
1176 static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
1177 struct sta_info *sta, int tid,
1178 enum ieee80211_frame_release_type reason,
1181 struct ieee80211_local *local = sdata->local;
1182 struct ieee80211_qos_hdr *nullfunc;
1183 struct sk_buff *skb;
1184 int size = sizeof(*nullfunc);
1186 bool qos = test_sta_flag(sta, WLAN_STA_WME);
1187 struct ieee80211_tx_info *info;
1188 struct ieee80211_chanctx_conf *chanctx_conf;
1191 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1192 IEEE80211_STYPE_QOS_NULLFUNC |
1193 IEEE80211_FCTL_FROMDS);
1196 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1197 IEEE80211_STYPE_NULLFUNC |
1198 IEEE80211_FCTL_FROMDS);
1201 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1205 skb_reserve(skb, local->hw.extra_tx_headroom);
1207 nullfunc = (void *) skb_put(skb, size);
1208 nullfunc->frame_control = fc;
1209 nullfunc->duration_id = 0;
1210 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1211 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1212 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1214 skb->priority = tid;
1215 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1217 nullfunc->qos_ctrl = cpu_to_le16(tid);
1219 if (reason == IEEE80211_FRAME_RELEASE_UAPSD)
1220 nullfunc->qos_ctrl |=
1221 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1224 info = IEEE80211_SKB_CB(skb);
1227 * Tell TX path to send this frame even though the
1228 * STA may still remain is PS mode after this frame
1229 * exchange. Also set EOSP to indicate this packet
1230 * ends the poll/service period.
1232 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1233 IEEE80211_TX_CTL_PS_RESPONSE |
1234 IEEE80211_TX_STATUS_EOSP |
1235 IEEE80211_TX_CTL_REQ_TX_STATUS;
1238 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1241 skb->dev = sdata->dev;
1244 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1245 if (WARN_ON(!chanctx_conf)) {
1251 ieee80211_xmit(sdata, skb, chanctx_conf->def.chan->band);
1255 static int find_highest_prio_tid(unsigned long tids)
1257 /* lower 3 TIDs aren't ordered perfectly */
1259 return fls(tids) - 1;
1260 /* TID 0 is BE just like TID 3 */
1263 return fls(tids) - 1;
1267 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1268 int n_frames, u8 ignored_acs,
1269 enum ieee80211_frame_release_type reason)
1271 struct ieee80211_sub_if_data *sdata = sta->sdata;
1272 struct ieee80211_local *local = sdata->local;
1273 bool more_data = false;
1275 unsigned long driver_release_tids = 0;
1276 struct sk_buff_head frames;
1278 /* Service or PS-Poll period starts */
1279 set_sta_flag(sta, WLAN_STA_SP);
1281 __skb_queue_head_init(&frames);
1283 /* Get response frame(s) and more data bit for the last one. */
1284 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1287 if (ignored_acs & BIT(ac))
1290 tids = ieee80211_tids_for_ac(ac);
1292 /* if we already have frames from software, then we can't also
1293 * release from hardware queues
1295 if (skb_queue_empty(&frames))
1296 driver_release_tids |= sta->driver_buffered_tids & tids;
1298 if (driver_release_tids) {
1299 /* If the driver has data on more than one TID then
1300 * certainly there's more data if we release just a
1301 * single frame now (from a single TID). This will
1302 * only happen for PS-Poll.
1304 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1305 hweight16(driver_release_tids) > 1) {
1307 driver_release_tids =
1308 BIT(find_highest_prio_tid(
1309 driver_release_tids));
1313 struct sk_buff *skb;
1315 while (n_frames > 0) {
1316 skb = skb_dequeue(&sta->tx_filtered[ac]);
1319 &sta->ps_tx_buf[ac]);
1321 local->total_ps_buffered--;
1326 __skb_queue_tail(&frames, skb);
1330 /* If we have more frames buffered on this AC, then set the
1331 * more-data bit and abort the loop since we can't send more
1332 * data from other ACs before the buffered frames from this.
1334 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1335 !skb_queue_empty(&sta->ps_tx_buf[ac])) {
1341 if (skb_queue_empty(&frames) && !driver_release_tids) {
1345 * For PS-Poll, this can only happen due to a race condition
1346 * when we set the TIM bit and the station notices it, but
1347 * before it can poll for the frame we expire it.
1349 * For uAPSD, this is said in the standard (11.2.1.5 h):
1350 * At each unscheduled SP for a non-AP STA, the AP shall
1351 * attempt to transmit at least one MSDU or MMPDU, but no
1352 * more than the value specified in the Max SP Length field
1353 * in the QoS Capability element from delivery-enabled ACs,
1354 * that are destined for the non-AP STA.
1356 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1359 /* This will evaluate to 1, 3, 5 or 7. */
1360 tid = 7 - ((ffs(~ignored_acs) - 1) << 1);
1362 ieee80211_send_null_response(sdata, sta, tid, reason, true);
1363 } else if (!driver_release_tids) {
1364 struct sk_buff_head pending;
1365 struct sk_buff *skb;
1368 bool need_null = false;
1370 skb_queue_head_init(&pending);
1372 while ((skb = __skb_dequeue(&frames))) {
1373 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1374 struct ieee80211_hdr *hdr = (void *) skb->data;
1380 * Tell TX path to send this frame even though the
1381 * STA may still remain is PS mode after this frame
1384 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1385 IEEE80211_TX_CTL_PS_RESPONSE;
1388 * Use MoreData flag to indicate whether there are
1389 * more buffered frames for this STA
1391 if (more_data || !skb_queue_empty(&frames))
1392 hdr->frame_control |=
1393 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1395 hdr->frame_control &=
1396 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1398 if (ieee80211_is_data_qos(hdr->frame_control) ||
1399 ieee80211_is_qos_nullfunc(hdr->frame_control))
1400 qoshdr = ieee80211_get_qos_ctl(hdr);
1402 tids |= BIT(skb->priority);
1404 __skb_queue_tail(&pending, skb);
1406 /* end service period after last frame or add one */
1407 if (!skb_queue_empty(&frames))
1410 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1411 /* for PS-Poll, there's only one frame */
1412 info->flags |= IEEE80211_TX_STATUS_EOSP |
1413 IEEE80211_TX_CTL_REQ_TX_STATUS;
1417 /* For uAPSD, things are a bit more complicated. If the
1418 * last frame has a QoS header (i.e. is a QoS-data or
1419 * QoS-nulldata frame) then just set the EOSP bit there
1421 * If the frame doesn't have a QoS header (which means
1422 * it should be a bufferable MMPDU) then we can't set
1423 * the EOSP bit in the QoS header; add a QoS-nulldata
1424 * frame to the list to send it after the MMPDU.
1426 * Note that this code is only in the mac80211-release
1427 * code path, we assume that the driver will not buffer
1428 * anything but QoS-data frames, or if it does, will
1429 * create the QoS-nulldata frame by itself if needed.
1431 * Cf. 802.11-2012 10.2.1.10 (c).
1434 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1436 info->flags |= IEEE80211_TX_STATUS_EOSP |
1437 IEEE80211_TX_CTL_REQ_TX_STATUS;
1439 /* The standard isn't completely clear on this
1440 * as it says the more-data bit should be set
1441 * if there are more BUs. The QoS-Null frame
1442 * we're about to send isn't buffered yet, we
1443 * only create it below, but let's pretend it
1444 * was buffered just in case some clients only
1445 * expect more-data=0 when eosp=1.
1447 hdr->frame_control |=
1448 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1455 drv_allow_buffered_frames(local, sta, tids, num,
1458 ieee80211_add_pending_skbs(local, &pending);
1461 ieee80211_send_null_response(
1462 sdata, sta, find_highest_prio_tid(tids),
1465 sta_info_recalc_tim(sta);
1468 * We need to release a frame that is buffered somewhere in the
1469 * driver ... it'll have to handle that.
1470 * Note that the driver also has to check the number of frames
1471 * on the TIDs we're releasing from - if there are more than
1472 * n_frames it has to set the more-data bit (if we didn't ask
1473 * it to set it anyway due to other buffered frames); if there
1474 * are fewer than n_frames it has to make sure to adjust that
1475 * to allow the service period to end properly.
1477 drv_release_buffered_frames(local, sta, driver_release_tids,
1478 n_frames, reason, more_data);
1481 * Note that we don't recalculate the TIM bit here as it would
1482 * most likely have no effect at all unless the driver told us
1483 * that the TID(s) became empty before returning here from the
1485 * Either way, however, when the driver tells us that the TID(s)
1486 * became empty we'll do the TIM recalculation.
1491 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1493 u8 ignore_for_response = sta->sta.uapsd_queues;
1496 * If all ACs are delivery-enabled then we should reply
1497 * from any of them, if only some are enabled we reply
1498 * only from the non-enabled ones.
1500 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1501 ignore_for_response = 0;
1503 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1504 IEEE80211_FRAME_RELEASE_PSPOLL);
1507 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1509 int n_frames = sta->sta.max_sp;
1510 u8 delivery_enabled = sta->sta.uapsd_queues;
1513 * If we ever grow support for TSPEC this might happen if
1514 * the TSPEC update from hostapd comes in between a trigger
1515 * frame setting WLAN_STA_UAPSD in the RX path and this
1516 * actually getting called.
1518 if (!delivery_enabled)
1521 switch (sta->sta.max_sp) {
1532 /* XXX: what is a good value? */
1537 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1538 IEEE80211_FRAME_RELEASE_UAPSD);
1541 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1542 struct ieee80211_sta *pubsta, bool block)
1544 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1546 trace_api_sta_block_awake(sta->local, pubsta, block);
1549 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1550 else if (test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1551 ieee80211_queue_work(hw, &sta->drv_unblock_wk);
1553 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1555 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1557 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1558 struct ieee80211_local *local = sta->local;
1560 trace_api_eosp(local, pubsta);
1562 clear_sta_flag(sta, WLAN_STA_SP);
1564 EXPORT_SYMBOL(ieee80211_sta_eosp);
1566 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1567 u8 tid, bool buffered)
1569 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1571 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1574 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1577 set_bit(tid, &sta->driver_buffered_tids);
1579 clear_bit(tid, &sta->driver_buffered_tids);
1581 sta_info_recalc_tim(sta);
1583 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1585 int sta_info_move_state(struct sta_info *sta,
1586 enum ieee80211_sta_state new_state)
1590 if (sta->sta_state == new_state)
1593 /* check allowed transitions first */
1595 switch (new_state) {
1596 case IEEE80211_STA_NONE:
1597 if (sta->sta_state != IEEE80211_STA_AUTH)
1600 case IEEE80211_STA_AUTH:
1601 if (sta->sta_state != IEEE80211_STA_NONE &&
1602 sta->sta_state != IEEE80211_STA_ASSOC)
1605 case IEEE80211_STA_ASSOC:
1606 if (sta->sta_state != IEEE80211_STA_AUTH &&
1607 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1610 case IEEE80211_STA_AUTHORIZED:
1611 if (sta->sta_state != IEEE80211_STA_ASSOC)
1615 WARN(1, "invalid state %d", new_state);
1619 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1620 sta->sta.addr, new_state);
1623 * notify the driver before the actual changes so it can
1624 * fail the transition
1626 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1627 int err = drv_sta_state(sta->local, sta->sdata, sta,
1628 sta->sta_state, new_state);
1633 /* reflect the change in all state variables */
1635 switch (new_state) {
1636 case IEEE80211_STA_NONE:
1637 if (sta->sta_state == IEEE80211_STA_AUTH)
1638 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1640 case IEEE80211_STA_AUTH:
1641 if (sta->sta_state == IEEE80211_STA_NONE)
1642 set_bit(WLAN_STA_AUTH, &sta->_flags);
1643 else if (sta->sta_state == IEEE80211_STA_ASSOC)
1644 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1646 case IEEE80211_STA_ASSOC:
1647 if (sta->sta_state == IEEE80211_STA_AUTH) {
1648 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1649 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1650 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1651 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1652 !sta->sdata->u.vlan.sta))
1653 atomic_dec(&sta->sdata->bss->num_mcast_sta);
1654 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1657 case IEEE80211_STA_AUTHORIZED:
1658 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1659 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
1660 (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1661 !sta->sdata->u.vlan.sta))
1662 atomic_inc(&sta->sdata->bss->num_mcast_sta);
1663 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1670 sta->sta_state = new_state;
1675 u8 sta_info_tx_streams(struct sta_info *sta)
1677 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1680 if (!sta->sta.ht_cap.ht_supported)
1683 if (sta->sta.vht_cap.vht_supported) {
1686 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1688 for (i = 7; i >= 0; i--)
1689 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1690 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1694 if (ht_cap->mcs.rx_mask[3])
1696 else if (ht_cap->mcs.rx_mask[2])
1698 else if (ht_cap->mcs.rx_mask[1])
1703 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1706 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1707 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;