2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/etherdevice.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/timer.h>
21 #include <linux/rtnetlink.h>
23 #include <net/codel.h>
24 #include <net/mac80211.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
29 #include "debugfs_sta.h"
34 * DOC: STA information lifetime rules
36 * STA info structures (&struct sta_info) are managed in a hash table
37 * for faster lookup and a list for iteration. They are managed using
38 * RCU, i.e. access to the list and hash table is protected by RCU.
40 * Upon allocating a STA info structure with sta_info_alloc(), the caller
41 * owns that structure. It must then insert it into the hash table using
42 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
43 * case (which acquires an rcu read section but must not be called from
44 * within one) will the pointer still be valid after the call. Note that
45 * the caller may not do much with the STA info before inserting it, in
46 * particular, it may not start any mesh peer link management or add
49 * When the insertion fails (sta_info_insert()) returns non-zero), the
50 * structure will have been freed by sta_info_insert()!
52 * Station entries are added by mac80211 when you establish a link with a
53 * peer. This means different things for the different type of interfaces
54 * we support. For a regular station this mean we add the AP sta when we
55 * receive an association response from the AP. For IBSS this occurs when
56 * get to know about a peer on the same IBSS. For WDS we add the sta for
57 * the peer immediately upon device open. When using AP mode we add stations
58 * for each respective station upon request from userspace through nl80211.
60 * In order to remove a STA info structure, various sta_info_destroy_*()
61 * calls are available.
63 * There is no concept of ownership on a STA entry, each structure is
64 * owned by the global hash table/list until it is removed. All users of
65 * the structure need to be RCU protected so that the structure won't be
66 * freed before they are done using it.
69 static const struct rhashtable_params sta_rht_params = {
70 .nelem_hint = 3, /* start small */
71 .automatic_shrinking = true,
72 .head_offset = offsetof(struct sta_info, hash_node),
73 .key_offset = offsetof(struct sta_info, addr),
75 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
78 /* Caller must hold local->sta_mtx */
79 static int sta_info_hash_del(struct ieee80211_local *local,
82 return rhltable_remove(&local->sta_hash, &sta->hash_node,
86 static void __cleanup_single_sta(struct sta_info *sta)
89 struct tid_ampdu_tx *tid_tx;
90 struct ieee80211_sub_if_data *sdata = sta->sdata;
91 struct ieee80211_local *local = sdata->local;
92 struct fq *fq = &local->fq;
95 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
96 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
97 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
98 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
99 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
100 ps = &sdata->bss->ps;
101 else if (ieee80211_vif_is_mesh(&sdata->vif))
102 ps = &sdata->u.mesh.ps;
106 clear_sta_flag(sta, WLAN_STA_PS_STA);
107 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
108 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
110 atomic_dec(&ps->num_sta_ps);
113 if (sta->sta.txq[0]) {
114 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
115 struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
117 spin_lock_bh(&fq->lock);
118 ieee80211_txq_purge(local, txqi);
119 spin_unlock_bh(&fq->lock);
123 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
124 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
125 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
126 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
129 if (ieee80211_vif_is_mesh(&sdata->vif))
130 mesh_sta_cleanup(sta);
132 cancel_work_sync(&sta->drv_deliver_wk);
135 * Destroy aggregation state here. It would be nice to wait for the
136 * driver to finish aggregation stop and then clean up, but for now
137 * drivers have to handle aggregation stop being requested, followed
138 * directly by station destruction.
140 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
141 kfree(sta->ampdu_mlme.tid_start_tx[i]);
142 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
145 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
150 static void cleanup_single_sta(struct sta_info *sta)
152 struct ieee80211_sub_if_data *sdata = sta->sdata;
153 struct ieee80211_local *local = sdata->local;
155 __cleanup_single_sta(sta);
156 sta_info_free(local, sta);
159 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
162 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
165 /* protected by RCU */
166 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
169 struct ieee80211_local *local = sdata->local;
170 struct rhlist_head *tmp;
171 struct sta_info *sta;
174 for_each_sta_info(local, addr, sta, tmp) {
175 if (sta->sdata == sdata) {
177 /* this is safe as the caller must already hold
178 * another rcu read section or the mutex
188 * Get sta info either from the specified interface
189 * or from one of its vlans
191 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
194 struct ieee80211_local *local = sdata->local;
195 struct rhlist_head *tmp;
196 struct sta_info *sta;
199 for_each_sta_info(local, addr, sta, tmp) {
200 if (sta->sdata == sdata ||
201 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
203 /* this is safe as the caller must already hold
204 * another rcu read section or the mutex
213 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
216 struct ieee80211_local *local = sdata->local;
217 struct sta_info *sta;
220 list_for_each_entry_rcu(sta, &local->sta_list, list) {
221 if (sdata != sta->sdata)
234 * sta_info_free - free STA
236 * @local: pointer to the global information
237 * @sta: STA info to free
239 * This function must undo everything done by sta_info_alloc()
240 * that may happen before sta_info_insert(). It may only be
241 * called when sta_info_insert() has not been attempted (and
242 * if that fails, the station is freed anyway.)
244 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
247 rate_control_free_sta(sta);
249 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
252 kfree(to_txq_info(sta->sta.txq[0]));
253 kfree(rcu_dereference_raw(sta->sta.rates));
254 #ifdef CONFIG_MAC80211_MESH
257 free_percpu(sta->pcpu_rx_stats);
261 /* Caller must hold local->sta_mtx */
262 static int sta_info_hash_add(struct ieee80211_local *local,
263 struct sta_info *sta)
265 return rhltable_insert(&local->sta_hash, &sta->hash_node,
269 static void sta_deliver_ps_frames(struct work_struct *wk)
271 struct sta_info *sta;
273 sta = container_of(wk, struct sta_info, drv_deliver_wk);
279 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
280 ieee80211_sta_ps_deliver_wakeup(sta);
281 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
282 ieee80211_sta_ps_deliver_poll_response(sta);
283 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
284 ieee80211_sta_ps_deliver_uapsd(sta);
288 static int sta_prepare_rate_control(struct ieee80211_local *local,
289 struct sta_info *sta, gfp_t gfp)
291 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
294 sta->rate_ctrl = local->rate_ctrl;
295 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
297 if (!sta->rate_ctrl_priv)
303 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
304 const u8 *addr, gfp_t gfp)
306 struct ieee80211_local *local = sdata->local;
307 struct ieee80211_hw *hw = &local->hw;
308 struct sta_info *sta;
311 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
315 if (ieee80211_hw_check(hw, USES_RSS)) {
317 alloc_percpu(struct ieee80211_sta_rx_stats);
318 if (!sta->pcpu_rx_stats)
322 spin_lock_init(&sta->lock);
323 spin_lock_init(&sta->ps_lock);
324 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
325 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
326 mutex_init(&sta->ampdu_mlme.mtx);
327 #ifdef CONFIG_MAC80211_MESH
328 if (ieee80211_vif_is_mesh(&sdata->vif)) {
329 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
332 spin_lock_init(&sta->mesh->plink_lock);
333 if (ieee80211_vif_is_mesh(&sdata->vif) &&
334 !sdata->u.mesh.user_mpm)
335 init_timer(&sta->mesh->plink_timer);
336 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
340 memcpy(sta->addr, addr, ETH_ALEN);
341 memcpy(sta->sta.addr, addr, ETH_ALEN);
342 sta->sta.max_rx_aggregation_subframes =
343 local->hw.max_rx_aggregation_subframes;
347 sta->rx_stats.last_rx = jiffies;
349 u64_stats_init(&sta->rx_stats.syncp);
351 sta->sta_state = IEEE80211_STA_NONE;
353 /* Mark TID as unreserved */
354 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
356 sta->last_connected = ktime_get_seconds();
357 ewma_signal_init(&sta->rx_stats_avg.signal);
358 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
359 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
361 if (local->ops->wake_tx_queue) {
363 int size = sizeof(struct txq_info) +
364 ALIGN(hw->txq_data_size, sizeof(void *));
366 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
370 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
371 struct txq_info *txq = txq_data + i * size;
373 ieee80211_txq_init(sdata, sta, txq, i);
377 if (sta_prepare_rate_control(local, sta, gfp))
380 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
382 * timer_to_tid must be initialized with identity mapping
383 * to enable session_timer's data differentiation. See
384 * sta_rx_agg_session_timer_expired for usage.
386 sta->timer_to_tid[i] = i;
388 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
389 skb_queue_head_init(&sta->ps_tx_buf[i]);
390 skb_queue_head_init(&sta->tx_filtered[i]);
393 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
394 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
396 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
397 if (sdata->vif.type == NL80211_IFTYPE_AP ||
398 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
399 struct ieee80211_supported_band *sband;
402 sband = ieee80211_get_sband(sdata);
406 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
407 IEEE80211_HT_CAP_SM_PS_SHIFT;
409 * Assume that hostapd advertises our caps in the beacon and
410 * this is the known_smps_mode for a station that just assciated
413 case WLAN_HT_SMPS_CONTROL_DISABLED:
414 sta->known_smps_mode = IEEE80211_SMPS_OFF;
416 case WLAN_HT_SMPS_CONTROL_STATIC:
417 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
419 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
420 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
427 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
429 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
430 sta->cparams.target = MS2TIME(20);
431 sta->cparams.interval = MS2TIME(100);
432 sta->cparams.ecn = true;
434 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
440 kfree(to_txq_info(sta->sta.txq[0]));
442 #ifdef CONFIG_MAC80211_MESH
449 static int sta_info_insert_check(struct sta_info *sta)
451 struct ieee80211_sub_if_data *sdata = sta->sdata;
454 * Can't be a WARN_ON because it can be triggered through a race:
455 * something inserts a STA (on one CPU) without holding the RTNL
456 * and another CPU turns off the net device.
458 if (unlikely(!ieee80211_sdata_running(sdata)))
461 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
462 is_multicast_ether_addr(sta->sta.addr)))
465 /* The RCU read lock is required by rhashtable due to
466 * asynchronous resize/rehash. We also require the mutex
470 lockdep_assert_held(&sdata->local->sta_mtx);
471 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
472 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
481 static int sta_info_insert_drv_state(struct ieee80211_local *local,
482 struct ieee80211_sub_if_data *sdata,
483 struct sta_info *sta)
485 enum ieee80211_sta_state state;
488 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
489 err = drv_sta_state(local, sdata, sta, state, state + 1);
496 * Drivers using legacy sta_add/sta_remove callbacks only
497 * get uploaded set to true after sta_add is called.
499 if (!local->ops->sta_add)
500 sta->uploaded = true;
504 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
506 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
507 sta->sta.addr, state + 1, err);
511 /* unwind on error */
512 for (; state > IEEE80211_STA_NOTEXIST; state--)
513 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
519 * should be called with sta_mtx locked
520 * this function replaces the mutex lock
523 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
525 struct ieee80211_local *local = sta->local;
526 struct ieee80211_sub_if_data *sdata = sta->sdata;
527 struct station_info *sinfo = NULL;
530 lockdep_assert_held(&local->sta_mtx);
532 /* check if STA exists already */
533 if (sta_info_get_bss(sdata, sta->sta.addr)) {
538 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
545 local->sta_generation++;
548 /* simplify things and don't accept BA sessions yet */
549 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
551 /* make the station visible */
552 err = sta_info_hash_add(local, sta);
556 list_add_tail_rcu(&sta->list, &local->sta_list);
559 err = sta_info_insert_drv_state(local, sdata, sta);
563 set_sta_flag(sta, WLAN_STA_INSERTED);
564 /* accept BA sessions now */
565 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
567 ieee80211_sta_debugfs_add(sta);
568 rate_control_add_sta_debugfs(sta);
570 sinfo->generation = local->sta_generation;
571 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
574 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
576 /* move reference to rcu-protected */
578 mutex_unlock(&local->sta_mtx);
580 if (ieee80211_vif_is_mesh(&sdata->vif))
581 mesh_accept_plinks_update(sdata);
585 sta_info_hash_del(local, sta);
586 list_del_rcu(&sta->list);
590 __cleanup_single_sta(sta);
592 mutex_unlock(&local->sta_mtx);
598 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
600 struct ieee80211_local *local = sta->local;
605 mutex_lock(&local->sta_mtx);
607 err = sta_info_insert_check(sta);
609 mutex_unlock(&local->sta_mtx);
614 err = sta_info_insert_finish(sta);
620 sta_info_free(local, sta);
624 int sta_info_insert(struct sta_info *sta)
626 int err = sta_info_insert_rcu(sta);
633 static inline void __bss_tim_set(u8 *tim, u16 id)
636 * This format has been mandated by the IEEE specifications,
637 * so this line may not be changed to use the __set_bit() format.
639 tim[id / 8] |= (1 << (id % 8));
642 static inline void __bss_tim_clear(u8 *tim, u16 id)
645 * This format has been mandated by the IEEE specifications,
646 * so this line may not be changed to use the __clear_bit() format.
648 tim[id / 8] &= ~(1 << (id % 8));
651 static inline bool __bss_tim_get(u8 *tim, u16 id)
654 * This format has been mandated by the IEEE specifications,
655 * so this line may not be changed to use the test_bit() format.
657 return tim[id / 8] & (1 << (id % 8));
660 static unsigned long ieee80211_tids_for_ac(int ac)
662 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
664 case IEEE80211_AC_VO:
665 return BIT(6) | BIT(7);
666 case IEEE80211_AC_VI:
667 return BIT(4) | BIT(5);
668 case IEEE80211_AC_BE:
669 return BIT(0) | BIT(3);
670 case IEEE80211_AC_BK:
671 return BIT(1) | BIT(2);
678 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
680 struct ieee80211_local *local = sta->local;
682 bool indicate_tim = false;
683 u8 ignore_for_tim = sta->sta.uapsd_queues;
685 u16 id = sta->sta.aid;
687 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
688 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
689 if (WARN_ON_ONCE(!sta->sdata->bss))
692 ps = &sta->sdata->bss->ps;
693 #ifdef CONFIG_MAC80211_MESH
694 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
695 ps = &sta->sdata->u.mesh.ps;
701 /* No need to do anything if the driver does all */
702 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
709 * If all ACs are delivery-enabled then we should build
710 * the TIM bit for all ACs anyway; if only some are then
711 * we ignore those and build the TIM bit using only the
714 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
718 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
720 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
723 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
726 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
727 !skb_queue_empty(&sta->ps_tx_buf[ac]);
731 tids = ieee80211_tids_for_ac(ac);
734 sta->driver_buffered_tids & tids;
736 sta->txq_buffered_tids & tids;
740 spin_lock_bh(&local->tim_lock);
742 if (indicate_tim == __bss_tim_get(ps->tim, id))
746 __bss_tim_set(ps->tim, id);
748 __bss_tim_clear(ps->tim, id);
750 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
751 local->tim_in_locked_section = true;
752 drv_set_tim(local, &sta->sta, indicate_tim);
753 local->tim_in_locked_section = false;
757 spin_unlock_bh(&local->tim_lock);
760 void sta_info_recalc_tim(struct sta_info *sta)
762 __sta_info_recalc_tim(sta, false);
765 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
767 struct ieee80211_tx_info *info;
773 info = IEEE80211_SKB_CB(skb);
775 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
776 timeout = (sta->listen_interval *
777 sta->sdata->vif.bss_conf.beacon_int *
779 if (timeout < STA_TX_BUFFER_EXPIRE)
780 timeout = STA_TX_BUFFER_EXPIRE;
781 return time_after(jiffies, info->control.jiffies + timeout);
785 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
786 struct sta_info *sta, int ac)
792 * First check for frames that should expire on the filtered
793 * queue. Frames here were rejected by the driver and are on
794 * a separate queue to avoid reordering with normal PS-buffered
795 * frames. They also aren't accounted for right now in the
796 * total_ps_buffered counter.
799 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
800 skb = skb_peek(&sta->tx_filtered[ac]);
801 if (sta_info_buffer_expired(sta, skb))
802 skb = __skb_dequeue(&sta->tx_filtered[ac]);
805 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
808 * Frames are queued in order, so if this one
809 * hasn't expired yet we can stop testing. If
810 * we actually reached the end of the queue we
811 * also need to stop, of course.
815 ieee80211_free_txskb(&local->hw, skb);
819 * Now also check the normal PS-buffered queue, this will
820 * only find something if the filtered queue was emptied
821 * since the filtered frames are all before the normal PS
825 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
826 skb = skb_peek(&sta->ps_tx_buf[ac]);
827 if (sta_info_buffer_expired(sta, skb))
828 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
831 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
834 * frames are queued in order, so if this one
835 * hasn't expired yet (or we reached the end of
836 * the queue) we can stop testing
841 local->total_ps_buffered--;
842 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
844 ieee80211_free_txskb(&local->hw, skb);
848 * Finally, recalculate the TIM bit for this station -- it might
849 * now be clear because the station was too slow to retrieve its
852 sta_info_recalc_tim(sta);
855 * Return whether there are any frames still buffered, this is
856 * used to check whether the cleanup timer still needs to run,
857 * if there are no frames we don't need to rearm the timer.
859 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
860 skb_queue_empty(&sta->tx_filtered[ac]));
863 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
864 struct sta_info *sta)
866 bool have_buffered = false;
869 /* This is only necessary for stations on BSS/MBSS interfaces */
870 if (!sta->sdata->bss &&
871 !ieee80211_vif_is_mesh(&sta->sdata->vif))
874 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
876 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
878 return have_buffered;
881 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
883 struct ieee80211_local *local;
884 struct ieee80211_sub_if_data *sdata;
895 lockdep_assert_held(&local->sta_mtx);
898 * Before removing the station from the driver and
899 * rate control, it might still start new aggregation
900 * sessions -- block that to make sure the tear-down
901 * will be sufficient.
903 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
904 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
907 * Before removing the station from the driver there might be pending
908 * rx frames on RSS queues sent prior to the disassociation - wait for
909 * all such frames to be processed.
911 drv_sync_rx_queues(local, sta);
913 ret = sta_info_hash_del(local, sta);
918 * for TDLS peers, make sure to return to the base channel before
921 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
922 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
923 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
926 list_del_rcu(&sta->list);
929 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
931 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
932 rcu_access_pointer(sdata->u.vlan.sta) == sta)
933 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
938 static void __sta_info_destroy_part2(struct sta_info *sta)
940 struct ieee80211_local *local = sta->local;
941 struct ieee80211_sub_if_data *sdata = sta->sdata;
942 struct station_info *sinfo;
946 * NOTE: This assumes at least synchronize_net() was done
947 * after _part1 and before _part2!
951 lockdep_assert_held(&local->sta_mtx);
953 /* now keys can no longer be reached */
954 ieee80211_free_sta_keys(local, sta);
956 /* disable TIM bit - last chance to tell driver */
957 __sta_info_recalc_tim(sta, true);
962 local->sta_generation++;
964 while (sta->sta_state > IEEE80211_STA_NONE) {
965 ret = sta_info_move_state(sta, sta->sta_state - 1);
973 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
974 IEEE80211_STA_NOTEXIST);
975 WARN_ON_ONCE(ret != 0);
978 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
980 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
982 sta_set_sinfo(sta, sinfo);
983 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
986 rate_control_remove_sta_debugfs(sta);
987 ieee80211_sta_debugfs_remove(sta);
989 cleanup_single_sta(sta);
992 int __must_check __sta_info_destroy(struct sta_info *sta)
994 int err = __sta_info_destroy_part1(sta);
1001 __sta_info_destroy_part2(sta);
1006 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1008 struct sta_info *sta;
1011 mutex_lock(&sdata->local->sta_mtx);
1012 sta = sta_info_get(sdata, addr);
1013 ret = __sta_info_destroy(sta);
1014 mutex_unlock(&sdata->local->sta_mtx);
1019 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1022 struct sta_info *sta;
1025 mutex_lock(&sdata->local->sta_mtx);
1026 sta = sta_info_get_bss(sdata, addr);
1027 ret = __sta_info_destroy(sta);
1028 mutex_unlock(&sdata->local->sta_mtx);
1033 static void sta_info_cleanup(unsigned long data)
1035 struct ieee80211_local *local = (struct ieee80211_local *) data;
1036 struct sta_info *sta;
1037 bool timer_needed = false;
1040 list_for_each_entry_rcu(sta, &local->sta_list, list)
1041 if (sta_info_cleanup_expire_buffered(local, sta))
1042 timer_needed = true;
1045 if (local->quiescing)
1051 mod_timer(&local->sta_cleanup,
1052 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1055 int sta_info_init(struct ieee80211_local *local)
1059 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1063 spin_lock_init(&local->tim_lock);
1064 mutex_init(&local->sta_mtx);
1065 INIT_LIST_HEAD(&local->sta_list);
1067 setup_timer(&local->sta_cleanup, sta_info_cleanup,
1068 (unsigned long)local);
1072 void sta_info_stop(struct ieee80211_local *local)
1074 del_timer_sync(&local->sta_cleanup);
1075 rhltable_destroy(&local->sta_hash);
1079 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1081 struct ieee80211_local *local = sdata->local;
1082 struct sta_info *sta, *tmp;
1083 LIST_HEAD(free_list);
1088 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1089 WARN_ON(vlans && !sdata->bss);
1091 mutex_lock(&local->sta_mtx);
1092 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1093 if (sdata == sta->sdata ||
1094 (vlans && sdata->bss == sta->sdata->bss)) {
1095 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1096 list_add(&sta->free_list, &free_list);
1101 if (!list_empty(&free_list)) {
1103 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1104 __sta_info_destroy_part2(sta);
1106 mutex_unlock(&local->sta_mtx);
1111 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1112 unsigned long exp_time)
1114 struct ieee80211_local *local = sdata->local;
1115 struct sta_info *sta, *tmp;
1117 mutex_lock(&local->sta_mtx);
1119 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1120 unsigned long last_active = ieee80211_sta_last_active(sta);
1122 if (sdata != sta->sdata)
1125 if (time_is_before_jiffies(last_active + exp_time)) {
1126 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1129 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1130 test_sta_flag(sta, WLAN_STA_PS_STA))
1131 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1133 WARN_ON(__sta_info_destroy(sta));
1137 mutex_unlock(&local->sta_mtx);
1140 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1142 const u8 *localaddr)
1144 struct ieee80211_local *local = hw_to_local(hw);
1145 struct rhlist_head *tmp;
1146 struct sta_info *sta;
1149 * Just return a random station if localaddr is NULL
1150 * ... first in list.
1152 for_each_sta_info(local, addr, sta, tmp) {
1154 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1163 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1165 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1168 struct sta_info *sta;
1173 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1182 EXPORT_SYMBOL(ieee80211_find_sta);
1184 /* powersave support code */
1185 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1187 struct ieee80211_sub_if_data *sdata = sta->sdata;
1188 struct ieee80211_local *local = sdata->local;
1189 struct sk_buff_head pending;
1190 int filtered = 0, buffered = 0, ac, i;
1191 unsigned long flags;
1194 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1195 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1198 if (sdata->vif.type == NL80211_IFTYPE_AP)
1199 ps = &sdata->bss->ps;
1200 else if (ieee80211_vif_is_mesh(&sdata->vif))
1201 ps = &sdata->u.mesh.ps;
1205 clear_sta_flag(sta, WLAN_STA_SP);
1207 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1208 sta->driver_buffered_tids = 0;
1209 sta->txq_buffered_tids = 0;
1211 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1212 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1214 if (sta->sta.txq[0]) {
1215 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1216 if (!txq_has_queue(sta->sta.txq[i]))
1219 drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
1223 skb_queue_head_init(&pending);
1225 /* sync with ieee80211_tx_h_unicast_ps_buf */
1226 spin_lock(&sta->ps_lock);
1227 /* Send all buffered frames to the station */
1228 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1229 int count = skb_queue_len(&pending), tmp;
1231 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1232 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1233 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1234 tmp = skb_queue_len(&pending);
1235 filtered += tmp - count;
1238 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1239 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1240 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1241 tmp = skb_queue_len(&pending);
1242 buffered += tmp - count;
1245 ieee80211_add_pending_skbs(local, &pending);
1247 /* now we're no longer in the deliver code */
1248 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1250 /* The station might have polled and then woken up before we responded,
1251 * so clear these flags now to avoid them sticking around.
1253 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1254 clear_sta_flag(sta, WLAN_STA_UAPSD);
1255 spin_unlock(&sta->ps_lock);
1257 atomic_dec(&ps->num_sta_ps);
1259 /* This station just woke up and isn't aware of our SMPS state */
1260 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1261 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1262 sdata->smps_mode) &&
1263 sta->known_smps_mode != sdata->bss->req_smps &&
1264 sta_info_tx_streams(sta) != 1) {
1266 "%pM just woke up and MIMO capable - update SMPS\n",
1268 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1270 sdata->vif.bss_conf.bssid);
1273 local->total_ps_buffered -= buffered;
1275 sta_info_recalc_tim(sta);
1278 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1279 sta->sta.addr, sta->sta.aid, filtered, buffered);
1281 ieee80211_check_fast_xmit(sta);
1284 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1285 enum ieee80211_frame_release_type reason,
1286 bool call_driver, bool more_data)
1288 struct ieee80211_sub_if_data *sdata = sta->sdata;
1289 struct ieee80211_local *local = sdata->local;
1290 struct ieee80211_qos_hdr *nullfunc;
1291 struct sk_buff *skb;
1292 int size = sizeof(*nullfunc);
1294 bool qos = sta->sta.wme;
1295 struct ieee80211_tx_info *info;
1296 struct ieee80211_chanctx_conf *chanctx_conf;
1299 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1300 IEEE80211_STYPE_QOS_NULLFUNC |
1301 IEEE80211_FCTL_FROMDS);
1304 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1305 IEEE80211_STYPE_NULLFUNC |
1306 IEEE80211_FCTL_FROMDS);
1309 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1313 skb_reserve(skb, local->hw.extra_tx_headroom);
1315 nullfunc = skb_put(skb, size);
1316 nullfunc->frame_control = fc;
1317 nullfunc->duration_id = 0;
1318 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1319 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1320 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1321 nullfunc->seq_ctrl = 0;
1323 skb->priority = tid;
1324 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1326 nullfunc->qos_ctrl = cpu_to_le16(tid);
1328 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1329 nullfunc->qos_ctrl |=
1330 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1332 nullfunc->frame_control |=
1333 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1337 info = IEEE80211_SKB_CB(skb);
1340 * Tell TX path to send this frame even though the
1341 * STA may still remain is PS mode after this frame
1342 * exchange. Also set EOSP to indicate this packet
1343 * ends the poll/service period.
1345 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1346 IEEE80211_TX_STATUS_EOSP |
1347 IEEE80211_TX_CTL_REQ_TX_STATUS;
1349 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1352 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1355 skb->dev = sdata->dev;
1358 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1359 if (WARN_ON(!chanctx_conf)) {
1365 info->band = chanctx_conf->def.chan->band;
1366 ieee80211_xmit(sdata, sta, skb);
1370 static int find_highest_prio_tid(unsigned long tids)
1372 /* lower 3 TIDs aren't ordered perfectly */
1374 return fls(tids) - 1;
1375 /* TID 0 is BE just like TID 3 */
1378 return fls(tids) - 1;
1381 /* Indicates if the MORE_DATA bit should be set in the last
1382 * frame obtained by ieee80211_sta_ps_get_frames.
1383 * Note that driver_release_tids is relevant only if
1384 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1387 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1388 enum ieee80211_frame_release_type reason,
1389 unsigned long driver_release_tids)
1393 /* If the driver has data on more than one TID then
1394 * certainly there's more data if we release just a
1395 * single frame now (from a single TID). This will
1396 * only happen for PS-Poll.
1398 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1399 hweight16(driver_release_tids) > 1)
1402 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1403 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1406 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1407 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1415 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1416 enum ieee80211_frame_release_type reason,
1417 struct sk_buff_head *frames,
1418 unsigned long *driver_release_tids)
1420 struct ieee80211_sub_if_data *sdata = sta->sdata;
1421 struct ieee80211_local *local = sdata->local;
1424 /* Get response frame(s) and more data bit for the last one. */
1425 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1428 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1431 tids = ieee80211_tids_for_ac(ac);
1433 /* if we already have frames from software, then we can't also
1434 * release from hardware queues
1436 if (skb_queue_empty(frames)) {
1437 *driver_release_tids |=
1438 sta->driver_buffered_tids & tids;
1439 *driver_release_tids |= sta->txq_buffered_tids & tids;
1442 if (!*driver_release_tids) {
1443 struct sk_buff *skb;
1445 while (n_frames > 0) {
1446 skb = skb_dequeue(&sta->tx_filtered[ac]);
1449 &sta->ps_tx_buf[ac]);
1451 local->total_ps_buffered--;
1456 __skb_queue_tail(frames, skb);
1460 /* If we have more frames buffered on this AC, then abort the
1461 * loop since we can't send more data from other ACs before
1462 * the buffered frames from this.
1464 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1465 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1471 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1472 int n_frames, u8 ignored_acs,
1473 enum ieee80211_frame_release_type reason)
1475 struct ieee80211_sub_if_data *sdata = sta->sdata;
1476 struct ieee80211_local *local = sdata->local;
1477 unsigned long driver_release_tids = 0;
1478 struct sk_buff_head frames;
1481 /* Service or PS-Poll period starts */
1482 set_sta_flag(sta, WLAN_STA_SP);
1484 __skb_queue_head_init(&frames);
1486 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1487 &frames, &driver_release_tids);
1489 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1491 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1492 driver_release_tids =
1493 BIT(find_highest_prio_tid(driver_release_tids));
1495 if (skb_queue_empty(&frames) && !driver_release_tids) {
1499 * For PS-Poll, this can only happen due to a race condition
1500 * when we set the TIM bit and the station notices it, but
1501 * before it can poll for the frame we expire it.
1503 * For uAPSD, this is said in the standard (11.2.1.5 h):
1504 * At each unscheduled SP for a non-AP STA, the AP shall
1505 * attempt to transmit at least one MSDU or MMPDU, but no
1506 * more than the value specified in the Max SP Length field
1507 * in the QoS Capability element from delivery-enabled ACs,
1508 * that are destined for the non-AP STA.
1510 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1513 /* This will evaluate to 1, 3, 5 or 7. */
1514 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1515 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1519 ieee80211_send_null_response(sta, tid, reason, true, false);
1520 } else if (!driver_release_tids) {
1521 struct sk_buff_head pending;
1522 struct sk_buff *skb;
1525 bool need_null = false;
1527 skb_queue_head_init(&pending);
1529 while ((skb = __skb_dequeue(&frames))) {
1530 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1531 struct ieee80211_hdr *hdr = (void *) skb->data;
1537 * Tell TX path to send this frame even though the
1538 * STA may still remain is PS mode after this frame
1541 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1542 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1545 * Use MoreData flag to indicate whether there are
1546 * more buffered frames for this STA
1548 if (more_data || !skb_queue_empty(&frames))
1549 hdr->frame_control |=
1550 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1552 hdr->frame_control &=
1553 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1555 if (ieee80211_is_data_qos(hdr->frame_control) ||
1556 ieee80211_is_qos_nullfunc(hdr->frame_control))
1557 qoshdr = ieee80211_get_qos_ctl(hdr);
1559 tids |= BIT(skb->priority);
1561 __skb_queue_tail(&pending, skb);
1563 /* end service period after last frame or add one */
1564 if (!skb_queue_empty(&frames))
1567 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1568 /* for PS-Poll, there's only one frame */
1569 info->flags |= IEEE80211_TX_STATUS_EOSP |
1570 IEEE80211_TX_CTL_REQ_TX_STATUS;
1574 /* For uAPSD, things are a bit more complicated. If the
1575 * last frame has a QoS header (i.e. is a QoS-data or
1576 * QoS-nulldata frame) then just set the EOSP bit there
1578 * If the frame doesn't have a QoS header (which means
1579 * it should be a bufferable MMPDU) then we can't set
1580 * the EOSP bit in the QoS header; add a QoS-nulldata
1581 * frame to the list to send it after the MMPDU.
1583 * Note that this code is only in the mac80211-release
1584 * code path, we assume that the driver will not buffer
1585 * anything but QoS-data frames, or if it does, will
1586 * create the QoS-nulldata frame by itself if needed.
1588 * Cf. 802.11-2012 10.2.1.10 (c).
1591 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1593 info->flags |= IEEE80211_TX_STATUS_EOSP |
1594 IEEE80211_TX_CTL_REQ_TX_STATUS;
1596 /* The standard isn't completely clear on this
1597 * as it says the more-data bit should be set
1598 * if there are more BUs. The QoS-Null frame
1599 * we're about to send isn't buffered yet, we
1600 * only create it below, but let's pretend it
1601 * was buffered just in case some clients only
1602 * expect more-data=0 when eosp=1.
1604 hdr->frame_control |=
1605 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1612 drv_allow_buffered_frames(local, sta, tids, num,
1615 ieee80211_add_pending_skbs(local, &pending);
1618 ieee80211_send_null_response(
1619 sta, find_highest_prio_tid(tids),
1620 reason, false, false);
1622 sta_info_recalc_tim(sta);
1627 * We need to release a frame that is buffered somewhere in the
1628 * driver ... it'll have to handle that.
1629 * Note that the driver also has to check the number of frames
1630 * on the TIDs we're releasing from - if there are more than
1631 * n_frames it has to set the more-data bit (if we didn't ask
1632 * it to set it anyway due to other buffered frames); if there
1633 * are fewer than n_frames it has to make sure to adjust that
1634 * to allow the service period to end properly.
1636 drv_release_buffered_frames(local, sta, driver_release_tids,
1637 n_frames, reason, more_data);
1640 * Note that we don't recalculate the TIM bit here as it would
1641 * most likely have no effect at all unless the driver told us
1642 * that the TID(s) became empty before returning here from the
1644 * Either way, however, when the driver tells us that the TID(s)
1645 * became empty or we find that a txq became empty, we'll do the
1646 * TIM recalculation.
1649 if (!sta->sta.txq[0])
1652 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1653 if (!(driver_release_tids & BIT(tid)) ||
1654 txq_has_queue(sta->sta.txq[tid]))
1657 sta_info_recalc_tim(sta);
1663 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1665 u8 ignore_for_response = sta->sta.uapsd_queues;
1668 * If all ACs are delivery-enabled then we should reply
1669 * from any of them, if only some are enabled we reply
1670 * only from the non-enabled ones.
1672 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1673 ignore_for_response = 0;
1675 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1676 IEEE80211_FRAME_RELEASE_PSPOLL);
1679 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1681 int n_frames = sta->sta.max_sp;
1682 u8 delivery_enabled = sta->sta.uapsd_queues;
1685 * If we ever grow support for TSPEC this might happen if
1686 * the TSPEC update from hostapd comes in between a trigger
1687 * frame setting WLAN_STA_UAPSD in the RX path and this
1688 * actually getting called.
1690 if (!delivery_enabled)
1693 switch (sta->sta.max_sp) {
1704 /* XXX: what is a good value? */
1709 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1710 IEEE80211_FRAME_RELEASE_UAPSD);
1713 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1714 struct ieee80211_sta *pubsta, bool block)
1716 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1718 trace_api_sta_block_awake(sta->local, pubsta, block);
1721 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1722 ieee80211_clear_fast_xmit(sta);
1726 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1729 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1730 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1731 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1732 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1733 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1734 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1735 /* must be asleep in this case */
1736 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1737 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1739 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1740 ieee80211_check_fast_xmit(sta);
1743 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1745 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1747 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1748 struct ieee80211_local *local = sta->local;
1750 trace_api_eosp(local, pubsta);
1752 clear_sta_flag(sta, WLAN_STA_SP);
1754 EXPORT_SYMBOL(ieee80211_sta_eosp);
1756 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1758 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1759 enum ieee80211_frame_release_type reason;
1762 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1764 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1765 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1768 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1770 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1772 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1773 u8 tid, bool buffered)
1775 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1777 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1780 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1783 set_bit(tid, &sta->driver_buffered_tids);
1785 clear_bit(tid, &sta->driver_buffered_tids);
1787 sta_info_recalc_tim(sta);
1789 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1792 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
1794 struct ieee80211_local *local = sdata->local;
1795 bool allow_p2p_go_ps = sdata->vif.p2p;
1796 struct sta_info *sta;
1799 list_for_each_entry_rcu(sta, &local->sta_list, list) {
1800 if (sdata != sta->sdata ||
1801 !test_sta_flag(sta, WLAN_STA_ASSOC))
1803 if (!sta->sta.support_p2p_ps) {
1804 allow_p2p_go_ps = false;
1810 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
1811 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
1812 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
1816 int sta_info_move_state(struct sta_info *sta,
1817 enum ieee80211_sta_state new_state)
1821 if (sta->sta_state == new_state)
1824 /* check allowed transitions first */
1826 switch (new_state) {
1827 case IEEE80211_STA_NONE:
1828 if (sta->sta_state != IEEE80211_STA_AUTH)
1831 case IEEE80211_STA_AUTH:
1832 if (sta->sta_state != IEEE80211_STA_NONE &&
1833 sta->sta_state != IEEE80211_STA_ASSOC)
1836 case IEEE80211_STA_ASSOC:
1837 if (sta->sta_state != IEEE80211_STA_AUTH &&
1838 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1841 case IEEE80211_STA_AUTHORIZED:
1842 if (sta->sta_state != IEEE80211_STA_ASSOC)
1846 WARN(1, "invalid state %d", new_state);
1850 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1851 sta->sta.addr, new_state);
1854 * notify the driver before the actual changes so it can
1855 * fail the transition
1857 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1858 int err = drv_sta_state(sta->local, sta->sdata, sta,
1859 sta->sta_state, new_state);
1864 /* reflect the change in all state variables */
1866 switch (new_state) {
1867 case IEEE80211_STA_NONE:
1868 if (sta->sta_state == IEEE80211_STA_AUTH)
1869 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1871 case IEEE80211_STA_AUTH:
1872 if (sta->sta_state == IEEE80211_STA_NONE) {
1873 set_bit(WLAN_STA_AUTH, &sta->_flags);
1874 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1875 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1876 ieee80211_recalc_min_chandef(sta->sdata);
1877 if (!sta->sta.support_p2p_ps)
1878 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1881 case IEEE80211_STA_ASSOC:
1882 if (sta->sta_state == IEEE80211_STA_AUTH) {
1883 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1884 ieee80211_recalc_min_chandef(sta->sdata);
1885 if (!sta->sta.support_p2p_ps)
1886 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1887 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1888 ieee80211_vif_dec_num_mcast(sta->sdata);
1889 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1890 ieee80211_clear_fast_xmit(sta);
1891 ieee80211_clear_fast_rx(sta);
1894 case IEEE80211_STA_AUTHORIZED:
1895 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1896 ieee80211_vif_inc_num_mcast(sta->sdata);
1897 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1898 ieee80211_check_fast_xmit(sta);
1899 ieee80211_check_fast_rx(sta);
1906 sta->sta_state = new_state;
1911 u8 sta_info_tx_streams(struct sta_info *sta)
1913 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1916 if (!sta->sta.ht_cap.ht_supported)
1919 if (sta->sta.vht_cap.vht_supported) {
1922 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1924 for (i = 7; i >= 0; i--)
1925 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1926 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1930 if (ht_cap->mcs.rx_mask[3])
1932 else if (ht_cap->mcs.rx_mask[2])
1934 else if (ht_cap->mcs.rx_mask[1])
1939 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1942 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1943 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1946 static struct ieee80211_sta_rx_stats *
1947 sta_get_last_rx_stats(struct sta_info *sta)
1949 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
1950 struct ieee80211_local *local = sta->local;
1953 if (!ieee80211_hw_check(&local->hw, USES_RSS))
1956 for_each_possible_cpu(cpu) {
1957 struct ieee80211_sta_rx_stats *cpustats;
1959 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
1961 if (time_after(cpustats->last_rx, stats->last_rx))
1968 static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate,
1969 struct rate_info *rinfo)
1971 rinfo->bw = STA_STATS_GET(BW, rate);
1973 switch (STA_STATS_GET(TYPE, rate)) {
1974 case STA_STATS_RATE_TYPE_VHT:
1975 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
1976 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
1977 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
1978 if (STA_STATS_GET(SGI, rate))
1979 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1981 case STA_STATS_RATE_TYPE_HT:
1982 rinfo->flags = RATE_INFO_FLAGS_MCS;
1983 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
1984 if (STA_STATS_GET(SGI, rate))
1985 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1987 case STA_STATS_RATE_TYPE_LEGACY: {
1988 struct ieee80211_supported_band *sband;
1991 int band = STA_STATS_GET(LEGACY_BAND, rate);
1992 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
1995 sband = local->hw.wiphy->bands[band];
1996 brate = sband->bitrates[rate_idx].bitrate;
1997 if (rinfo->bw == RATE_INFO_BW_5)
1999 else if (rinfo->bw == RATE_INFO_BW_10)
2003 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2009 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2011 u16 rate = ACCESS_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2013 if (rate == STA_STATS_RATE_INVALID)
2016 sta_stats_decode_rate(sta->local, rate, rinfo);
2020 static void sta_set_tidstats(struct sta_info *sta,
2021 struct cfg80211_tid_stats *tidstats,
2024 struct ieee80211_local *local = sta->local;
2026 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2030 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2031 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2032 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2034 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2037 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2038 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2039 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2042 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2043 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2044 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2045 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2048 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2049 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2050 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2051 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2055 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2061 start = u64_stats_fetch_begin(&rxstats->syncp);
2062 value = rxstats->bytes;
2063 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2068 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
2070 struct ieee80211_sub_if_data *sdata = sta->sdata;
2071 struct ieee80211_local *local = sdata->local;
2074 struct ieee80211_sta_rx_stats *last_rxstats;
2076 last_rxstats = sta_get_last_rx_stats(sta);
2078 sinfo->generation = sdata->local->sta_generation;
2080 /* do before driver, so beacon filtering drivers have a
2081 * chance to e.g. just add the number of filtered beacons
2082 * (or just modify the value entirely, of course)
2084 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2085 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2087 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2089 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
2090 BIT(NL80211_STA_INFO_STA_FLAGS) |
2091 BIT(NL80211_STA_INFO_BSS_PARAM) |
2092 BIT(NL80211_STA_INFO_CONNECTED_TIME) |
2093 BIT(NL80211_STA_INFO_RX_DROP_MISC);
2095 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2096 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2097 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
2100 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2101 sinfo->inactive_time =
2102 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2104 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
2105 BIT(NL80211_STA_INFO_TX_BYTES)))) {
2106 sinfo->tx_bytes = 0;
2107 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2108 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2109 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
2112 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
2113 sinfo->tx_packets = 0;
2114 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2115 sinfo->tx_packets += sta->tx_stats.packets[ac];
2116 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
2119 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
2120 BIT(NL80211_STA_INFO_RX_BYTES)))) {
2121 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2123 if (sta->pcpu_rx_stats) {
2124 for_each_possible_cpu(cpu) {
2125 struct ieee80211_sta_rx_stats *cpurxs;
2127 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2128 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2132 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
2135 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
2136 sinfo->rx_packets = sta->rx_stats.packets;
2137 if (sta->pcpu_rx_stats) {
2138 for_each_possible_cpu(cpu) {
2139 struct ieee80211_sta_rx_stats *cpurxs;
2141 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2142 sinfo->rx_packets += cpurxs->packets;
2145 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
2148 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
2149 sinfo->tx_retries = sta->status_stats.retry_count;
2150 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
2153 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
2154 sinfo->tx_failed = sta->status_stats.retry_failed;
2155 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
2158 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2159 if (sta->pcpu_rx_stats) {
2160 for_each_possible_cpu(cpu) {
2161 struct ieee80211_sta_rx_stats *cpurxs;
2163 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2164 sinfo->rx_dropped_misc += cpurxs->dropped;
2168 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2169 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2170 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
2171 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2172 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2175 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2176 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2177 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
2178 sinfo->signal = (s8)last_rxstats->last_signal;
2179 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
2182 if (!sta->pcpu_rx_stats &&
2183 !(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
2185 -ewma_signal_read(&sta->rx_stats_avg.signal);
2186 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
2190 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2191 * the sta->rx_stats struct, so the check here is fine with and without
2194 if (last_rxstats->chains &&
2195 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
2196 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2197 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL);
2198 if (!sta->pcpu_rx_stats)
2199 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2201 sinfo->chains = last_rxstats->chains;
2203 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2204 sinfo->chain_signal[i] =
2205 last_rxstats->chain_signal_last[i];
2206 sinfo->chain_signal_avg[i] =
2207 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2211 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
2212 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2214 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
2217 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
2218 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2219 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
2222 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
2223 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
2224 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
2226 sta_set_tidstats(sta, tidstats, i);
2229 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2230 #ifdef CONFIG_MAC80211_MESH
2231 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
2232 BIT(NL80211_STA_INFO_PLID) |
2233 BIT(NL80211_STA_INFO_PLINK_STATE) |
2234 BIT(NL80211_STA_INFO_LOCAL_PM) |
2235 BIT(NL80211_STA_INFO_PEER_PM) |
2236 BIT(NL80211_STA_INFO_NONPEER_PM);
2238 sinfo->llid = sta->mesh->llid;
2239 sinfo->plid = sta->mesh->plid;
2240 sinfo->plink_state = sta->mesh->plink_state;
2241 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2242 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
2243 sinfo->t_offset = sta->mesh->t_offset;
2245 sinfo->local_pm = sta->mesh->local_pm;
2246 sinfo->peer_pm = sta->mesh->peer_pm;
2247 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2251 sinfo->bss_param.flags = 0;
2252 if (sdata->vif.bss_conf.use_cts_prot)
2253 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2254 if (sdata->vif.bss_conf.use_short_preamble)
2255 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2256 if (sdata->vif.bss_conf.use_short_slot)
2257 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2258 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2259 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2261 sinfo->sta_flags.set = 0;
2262 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2263 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2264 BIT(NL80211_STA_FLAG_WME) |
2265 BIT(NL80211_STA_FLAG_MFP) |
2266 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2267 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2268 BIT(NL80211_STA_FLAG_TDLS_PEER);
2269 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2270 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2271 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2272 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2274 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2275 if (test_sta_flag(sta, WLAN_STA_MFP))
2276 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2277 if (test_sta_flag(sta, WLAN_STA_AUTH))
2278 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2279 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2280 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2281 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2282 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2284 thr = sta_get_expected_throughput(sta);
2287 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2288 sinfo->expected_throughput = thr;
2292 u32 sta_get_expected_throughput(struct sta_info *sta)
2294 struct ieee80211_sub_if_data *sdata = sta->sdata;
2295 struct ieee80211_local *local = sdata->local;
2296 struct rate_control_ref *ref = NULL;
2299 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2300 ref = local->rate_ctrl;
2302 /* check if the driver has a SW RC implementation */
2303 if (ref && ref->ops->get_expected_throughput)
2304 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2306 thr = drv_get_expected_throughput(local, sta);
2311 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2313 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2315 if (time_after(stats->last_rx, sta->status_stats.last_ack))
2316 return stats->last_rx;
2317 return sta->status_stats.last_ack;
2320 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2322 if (!sta->sdata->local->ops->wake_tx_queue)
2325 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2326 sta->cparams.target = MS2TIME(50);
2327 sta->cparams.interval = MS2TIME(300);
2328 sta->cparams.ecn = false;
2330 sta->cparams.target = MS2TIME(20);
2331 sta->cparams.interval = MS2TIME(100);
2332 sta->cparams.ecn = true;
2336 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2339 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2341 sta_update_codel_params(sta, thr);