2 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
6 * Copyright (C) 2018 Intel Corporation
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/etherdevice.h>
16 #include <linux/netdevice.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/if_arp.h>
21 #include <linux/timer.h>
22 #include <linux/rtnetlink.h>
24 #include <net/codel.h>
25 #include <net/mac80211.h>
26 #include "ieee80211_i.h"
27 #include "driver-ops.h"
30 #include "debugfs_sta.h"
35 * DOC: STA information lifetime rules
37 * STA info structures (&struct sta_info) are managed in a hash table
38 * for faster lookup and a list for iteration. They are managed using
39 * RCU, i.e. access to the list and hash table is protected by RCU.
41 * Upon allocating a STA info structure with sta_info_alloc(), the caller
42 * owns that structure. It must then insert it into the hash table using
43 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
44 * case (which acquires an rcu read section but must not be called from
45 * within one) will the pointer still be valid after the call. Note that
46 * the caller may not do much with the STA info before inserting it, in
47 * particular, it may not start any mesh peer link management or add
50 * When the insertion fails (sta_info_insert()) returns non-zero), the
51 * structure will have been freed by sta_info_insert()!
53 * Station entries are added by mac80211 when you establish a link with a
54 * peer. This means different things for the different type of interfaces
55 * we support. For a regular station this mean we add the AP sta when we
56 * receive an association response from the AP. For IBSS this occurs when
57 * get to know about a peer on the same IBSS. For WDS we add the sta for
58 * the peer immediately upon device open. When using AP mode we add stations
59 * for each respective station upon request from userspace through nl80211.
61 * In order to remove a STA info structure, various sta_info_destroy_*()
62 * calls are available.
64 * There is no concept of ownership on a STA entry, each structure is
65 * owned by the global hash table/list until it is removed. All users of
66 * the structure need to be RCU protected so that the structure won't be
67 * freed before they are done using it.
70 static const struct rhashtable_params sta_rht_params = {
71 .nelem_hint = 3, /* start small */
72 .automatic_shrinking = true,
73 .head_offset = offsetof(struct sta_info, hash_node),
74 .key_offset = offsetof(struct sta_info, addr),
76 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
79 /* Caller must hold local->sta_mtx */
80 static int sta_info_hash_del(struct ieee80211_local *local,
83 return rhltable_remove(&local->sta_hash, &sta->hash_node,
87 static void __cleanup_single_sta(struct sta_info *sta)
90 struct tid_ampdu_tx *tid_tx;
91 struct ieee80211_sub_if_data *sdata = sta->sdata;
92 struct ieee80211_local *local = sdata->local;
93 struct fq *fq = &local->fq;
96 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
97 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
98 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
99 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
100 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
101 ps = &sdata->bss->ps;
102 else if (ieee80211_vif_is_mesh(&sdata->vif))
103 ps = &sdata->u.mesh.ps;
107 clear_sta_flag(sta, WLAN_STA_PS_STA);
108 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
109 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
111 atomic_dec(&ps->num_sta_ps);
114 if (sta->sta.txq[0]) {
115 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
116 struct txq_info *txqi;
118 if (!sta->sta.txq[i])
121 txqi = to_txq_info(sta->sta.txq[i]);
123 spin_lock_bh(&fq->lock);
124 ieee80211_txq_purge(local, txqi);
125 spin_unlock_bh(&fq->lock);
129 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
130 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
131 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
132 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
135 if (ieee80211_vif_is_mesh(&sdata->vif))
136 mesh_sta_cleanup(sta);
138 cancel_work_sync(&sta->drv_deliver_wk);
141 * Destroy aggregation state here. It would be nice to wait for the
142 * driver to finish aggregation stop and then clean up, but for now
143 * drivers have to handle aggregation stop being requested, followed
144 * directly by station destruction.
146 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
147 kfree(sta->ampdu_mlme.tid_start_tx[i]);
148 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
151 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
156 static void cleanup_single_sta(struct sta_info *sta)
158 struct ieee80211_sub_if_data *sdata = sta->sdata;
159 struct ieee80211_local *local = sdata->local;
161 __cleanup_single_sta(sta);
162 sta_info_free(local, sta);
165 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
168 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
171 /* protected by RCU */
172 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
175 struct ieee80211_local *local = sdata->local;
176 struct rhlist_head *tmp;
177 struct sta_info *sta;
180 for_each_sta_info(local, addr, sta, tmp) {
181 if (sta->sdata == sdata) {
183 /* this is safe as the caller must already hold
184 * another rcu read section or the mutex
194 * Get sta info either from the specified interface
195 * or from one of its vlans
197 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
200 struct ieee80211_local *local = sdata->local;
201 struct rhlist_head *tmp;
202 struct sta_info *sta;
205 for_each_sta_info(local, addr, sta, tmp) {
206 if (sta->sdata == sdata ||
207 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
209 /* this is safe as the caller must already hold
210 * another rcu read section or the mutex
219 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
222 struct ieee80211_local *local = sdata->local;
223 struct sta_info *sta;
226 list_for_each_entry_rcu(sta, &local->sta_list, list) {
227 if (sdata != sta->sdata)
240 * sta_info_free - free STA
242 * @local: pointer to the global information
243 * @sta: STA info to free
245 * This function must undo everything done by sta_info_alloc()
246 * that may happen before sta_info_insert(). It may only be
247 * called when sta_info_insert() has not been attempted (and
248 * if that fails, the station is freed anyway.)
250 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
253 rate_control_free_sta(sta);
255 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
258 kfree(to_txq_info(sta->sta.txq[0]));
259 kfree(rcu_dereference_raw(sta->sta.rates));
260 #ifdef CONFIG_MAC80211_MESH
263 free_percpu(sta->pcpu_rx_stats);
267 /* Caller must hold local->sta_mtx */
268 static int sta_info_hash_add(struct ieee80211_local *local,
269 struct sta_info *sta)
271 return rhltable_insert(&local->sta_hash, &sta->hash_node,
275 static void sta_deliver_ps_frames(struct work_struct *wk)
277 struct sta_info *sta;
279 sta = container_of(wk, struct sta_info, drv_deliver_wk);
285 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
286 ieee80211_sta_ps_deliver_wakeup(sta);
287 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
288 ieee80211_sta_ps_deliver_poll_response(sta);
289 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
290 ieee80211_sta_ps_deliver_uapsd(sta);
294 static int sta_prepare_rate_control(struct ieee80211_local *local,
295 struct sta_info *sta, gfp_t gfp)
297 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
300 sta->rate_ctrl = local->rate_ctrl;
301 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
303 if (!sta->rate_ctrl_priv)
309 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
310 const u8 *addr, gfp_t gfp)
312 struct ieee80211_local *local = sdata->local;
313 struct ieee80211_hw *hw = &local->hw;
314 struct sta_info *sta;
317 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
321 if (ieee80211_hw_check(hw, USES_RSS)) {
323 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
324 if (!sta->pcpu_rx_stats)
328 spin_lock_init(&sta->lock);
329 spin_lock_init(&sta->ps_lock);
330 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
331 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
332 mutex_init(&sta->ampdu_mlme.mtx);
333 #ifdef CONFIG_MAC80211_MESH
334 if (ieee80211_vif_is_mesh(&sdata->vif)) {
335 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
338 sta->mesh->plink_sta = sta;
339 spin_lock_init(&sta->mesh->plink_lock);
340 if (ieee80211_vif_is_mesh(&sdata->vif) &&
341 !sdata->u.mesh.user_mpm)
342 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
344 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
348 memcpy(sta->addr, addr, ETH_ALEN);
349 memcpy(sta->sta.addr, addr, ETH_ALEN);
350 sta->sta.max_rx_aggregation_subframes =
351 local->hw.max_rx_aggregation_subframes;
355 sta->rx_stats.last_rx = jiffies;
357 u64_stats_init(&sta->rx_stats.syncp);
359 sta->sta_state = IEEE80211_STA_NONE;
361 /* Mark TID as unreserved */
362 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
364 sta->last_connected = ktime_get_seconds();
365 ewma_signal_init(&sta->rx_stats_avg.signal);
366 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
367 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
368 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
370 if (local->ops->wake_tx_queue) {
372 int size = sizeof(struct txq_info) +
373 ALIGN(hw->txq_data_size, sizeof(void *));
375 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
379 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
380 struct txq_info *txq = txq_data + i * size;
382 /* might not do anything for the bufferable MMPDU TXQ */
383 ieee80211_txq_init(sdata, sta, txq, i);
387 if (sta_prepare_rate_control(local, sta, gfp))
390 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
391 skb_queue_head_init(&sta->ps_tx_buf[i]);
392 skb_queue_head_init(&sta->tx_filtered[i]);
395 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
396 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
398 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
399 if (sdata->vif.type == NL80211_IFTYPE_AP ||
400 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
401 struct ieee80211_supported_band *sband;
404 sband = ieee80211_get_sband(sdata);
408 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
409 IEEE80211_HT_CAP_SM_PS_SHIFT;
411 * Assume that hostapd advertises our caps in the beacon and
412 * this is the known_smps_mode for a station that just assciated
415 case WLAN_HT_SMPS_CONTROL_DISABLED:
416 sta->known_smps_mode = IEEE80211_SMPS_OFF;
418 case WLAN_HT_SMPS_CONTROL_STATIC:
419 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
421 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
422 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
429 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
431 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
432 sta->cparams.target = MS2TIME(20);
433 sta->cparams.interval = MS2TIME(100);
434 sta->cparams.ecn = true;
436 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
442 kfree(to_txq_info(sta->sta.txq[0]));
444 free_percpu(sta->pcpu_rx_stats);
445 #ifdef CONFIG_MAC80211_MESH
452 static int sta_info_insert_check(struct sta_info *sta)
454 struct ieee80211_sub_if_data *sdata = sta->sdata;
457 * Can't be a WARN_ON because it can be triggered through a race:
458 * something inserts a STA (on one CPU) without holding the RTNL
459 * and another CPU turns off the net device.
461 if (unlikely(!ieee80211_sdata_running(sdata)))
464 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
465 is_multicast_ether_addr(sta->sta.addr)))
468 /* The RCU read lock is required by rhashtable due to
469 * asynchronous resize/rehash. We also require the mutex
473 lockdep_assert_held(&sdata->local->sta_mtx);
474 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
475 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
484 static int sta_info_insert_drv_state(struct ieee80211_local *local,
485 struct ieee80211_sub_if_data *sdata,
486 struct sta_info *sta)
488 enum ieee80211_sta_state state;
491 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
492 err = drv_sta_state(local, sdata, sta, state, state + 1);
499 * Drivers using legacy sta_add/sta_remove callbacks only
500 * get uploaded set to true after sta_add is called.
502 if (!local->ops->sta_add)
503 sta->uploaded = true;
507 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
509 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
510 sta->sta.addr, state + 1, err);
514 /* unwind on error */
515 for (; state > IEEE80211_STA_NOTEXIST; state--)
516 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
522 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
524 struct ieee80211_local *local = sdata->local;
525 bool allow_p2p_go_ps = sdata->vif.p2p;
526 struct sta_info *sta;
529 list_for_each_entry_rcu(sta, &local->sta_list, list) {
530 if (sdata != sta->sdata ||
531 !test_sta_flag(sta, WLAN_STA_ASSOC))
533 if (!sta->sta.support_p2p_ps) {
534 allow_p2p_go_ps = false;
540 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
541 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
542 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
547 * should be called with sta_mtx locked
548 * this function replaces the mutex lock
551 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
553 struct ieee80211_local *local = sta->local;
554 struct ieee80211_sub_if_data *sdata = sta->sdata;
555 struct station_info *sinfo = NULL;
558 lockdep_assert_held(&local->sta_mtx);
560 /* check if STA exists already */
561 if (sta_info_get_bss(sdata, sta->sta.addr)) {
566 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
573 local->sta_generation++;
576 /* simplify things and don't accept BA sessions yet */
577 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
579 /* make the station visible */
580 err = sta_info_hash_add(local, sta);
584 list_add_tail_rcu(&sta->list, &local->sta_list);
587 err = sta_info_insert_drv_state(local, sdata, sta);
591 set_sta_flag(sta, WLAN_STA_INSERTED);
593 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
594 ieee80211_recalc_min_chandef(sta->sdata);
595 if (!sta->sta.support_p2p_ps)
596 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
599 /* accept BA sessions now */
600 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
602 ieee80211_sta_debugfs_add(sta);
603 rate_control_add_sta_debugfs(sta);
605 sinfo->generation = local->sta_generation;
606 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
609 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
611 /* move reference to rcu-protected */
613 mutex_unlock(&local->sta_mtx);
615 if (ieee80211_vif_is_mesh(&sdata->vif))
616 mesh_accept_plinks_update(sdata);
620 sta_info_hash_del(local, sta);
621 list_del_rcu(&sta->list);
625 __cleanup_single_sta(sta);
627 mutex_unlock(&local->sta_mtx);
633 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
635 struct ieee80211_local *local = sta->local;
640 mutex_lock(&local->sta_mtx);
642 err = sta_info_insert_check(sta);
644 mutex_unlock(&local->sta_mtx);
649 err = sta_info_insert_finish(sta);
655 sta_info_free(local, sta);
659 int sta_info_insert(struct sta_info *sta)
661 int err = sta_info_insert_rcu(sta);
668 static inline void __bss_tim_set(u8 *tim, u16 id)
671 * This format has been mandated by the IEEE specifications,
672 * so this line may not be changed to use the __set_bit() format.
674 tim[id / 8] |= (1 << (id % 8));
677 static inline void __bss_tim_clear(u8 *tim, u16 id)
680 * This format has been mandated by the IEEE specifications,
681 * so this line may not be changed to use the __clear_bit() format.
683 tim[id / 8] &= ~(1 << (id % 8));
686 static inline bool __bss_tim_get(u8 *tim, u16 id)
689 * This format has been mandated by the IEEE specifications,
690 * so this line may not be changed to use the test_bit() format.
692 return tim[id / 8] & (1 << (id % 8));
695 static unsigned long ieee80211_tids_for_ac(int ac)
697 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
699 case IEEE80211_AC_VO:
700 return BIT(6) | BIT(7);
701 case IEEE80211_AC_VI:
702 return BIT(4) | BIT(5);
703 case IEEE80211_AC_BE:
704 return BIT(0) | BIT(3);
705 case IEEE80211_AC_BK:
706 return BIT(1) | BIT(2);
713 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
715 struct ieee80211_local *local = sta->local;
717 bool indicate_tim = false;
718 u8 ignore_for_tim = sta->sta.uapsd_queues;
720 u16 id = sta->sta.aid;
722 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
723 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
724 if (WARN_ON_ONCE(!sta->sdata->bss))
727 ps = &sta->sdata->bss->ps;
728 #ifdef CONFIG_MAC80211_MESH
729 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
730 ps = &sta->sdata->u.mesh.ps;
736 /* No need to do anything if the driver does all */
737 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
744 * If all ACs are delivery-enabled then we should build
745 * the TIM bit for all ACs anyway; if only some are then
746 * we ignore those and build the TIM bit using only the
749 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
753 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
755 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
758 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
761 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
762 !skb_queue_empty(&sta->ps_tx_buf[ac]);
766 tids = ieee80211_tids_for_ac(ac);
769 sta->driver_buffered_tids & tids;
771 sta->txq_buffered_tids & tids;
775 spin_lock_bh(&local->tim_lock);
777 if (indicate_tim == __bss_tim_get(ps->tim, id))
781 __bss_tim_set(ps->tim, id);
783 __bss_tim_clear(ps->tim, id);
785 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
786 local->tim_in_locked_section = true;
787 drv_set_tim(local, &sta->sta, indicate_tim);
788 local->tim_in_locked_section = false;
792 spin_unlock_bh(&local->tim_lock);
795 void sta_info_recalc_tim(struct sta_info *sta)
797 __sta_info_recalc_tim(sta, false);
800 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
802 struct ieee80211_tx_info *info;
808 info = IEEE80211_SKB_CB(skb);
810 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
811 timeout = (sta->listen_interval *
812 sta->sdata->vif.bss_conf.beacon_int *
814 if (timeout < STA_TX_BUFFER_EXPIRE)
815 timeout = STA_TX_BUFFER_EXPIRE;
816 return time_after(jiffies, info->control.jiffies + timeout);
820 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
821 struct sta_info *sta, int ac)
827 * First check for frames that should expire on the filtered
828 * queue. Frames here were rejected by the driver and are on
829 * a separate queue to avoid reordering with normal PS-buffered
830 * frames. They also aren't accounted for right now in the
831 * total_ps_buffered counter.
834 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
835 skb = skb_peek(&sta->tx_filtered[ac]);
836 if (sta_info_buffer_expired(sta, skb))
837 skb = __skb_dequeue(&sta->tx_filtered[ac]);
840 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
843 * Frames are queued in order, so if this one
844 * hasn't expired yet we can stop testing. If
845 * we actually reached the end of the queue we
846 * also need to stop, of course.
850 ieee80211_free_txskb(&local->hw, skb);
854 * Now also check the normal PS-buffered queue, this will
855 * only find something if the filtered queue was emptied
856 * since the filtered frames are all before the normal PS
860 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
861 skb = skb_peek(&sta->ps_tx_buf[ac]);
862 if (sta_info_buffer_expired(sta, skb))
863 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
866 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
869 * frames are queued in order, so if this one
870 * hasn't expired yet (or we reached the end of
871 * the queue) we can stop testing
876 local->total_ps_buffered--;
877 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
879 ieee80211_free_txskb(&local->hw, skb);
883 * Finally, recalculate the TIM bit for this station -- it might
884 * now be clear because the station was too slow to retrieve its
887 sta_info_recalc_tim(sta);
890 * Return whether there are any frames still buffered, this is
891 * used to check whether the cleanup timer still needs to run,
892 * if there are no frames we don't need to rearm the timer.
894 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
895 skb_queue_empty(&sta->tx_filtered[ac]));
898 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
899 struct sta_info *sta)
901 bool have_buffered = false;
904 /* This is only necessary for stations on BSS/MBSS interfaces */
905 if (!sta->sdata->bss &&
906 !ieee80211_vif_is_mesh(&sta->sdata->vif))
909 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
911 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
913 return have_buffered;
916 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
918 struct ieee80211_local *local;
919 struct ieee80211_sub_if_data *sdata;
930 lockdep_assert_held(&local->sta_mtx);
933 * Before removing the station from the driver and
934 * rate control, it might still start new aggregation
935 * sessions -- block that to make sure the tear-down
936 * will be sufficient.
938 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
939 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
942 * Before removing the station from the driver there might be pending
943 * rx frames on RSS queues sent prior to the disassociation - wait for
944 * all such frames to be processed.
946 drv_sync_rx_queues(local, sta);
948 ret = sta_info_hash_del(local, sta);
953 * for TDLS peers, make sure to return to the base channel before
956 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
957 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
958 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
961 list_del_rcu(&sta->list);
964 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
966 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
967 rcu_access_pointer(sdata->u.vlan.sta) == sta)
968 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
973 static void __sta_info_destroy_part2(struct sta_info *sta)
975 struct ieee80211_local *local = sta->local;
976 struct ieee80211_sub_if_data *sdata = sta->sdata;
977 struct station_info *sinfo;
981 * NOTE: This assumes at least synchronize_net() was done
982 * after _part1 and before _part2!
986 lockdep_assert_held(&local->sta_mtx);
988 /* now keys can no longer be reached */
989 ieee80211_free_sta_keys(local, sta);
991 /* disable TIM bit - last chance to tell driver */
992 __sta_info_recalc_tim(sta, true);
997 local->sta_generation++;
999 while (sta->sta_state > IEEE80211_STA_NONE) {
1000 ret = sta_info_move_state(sta, sta->sta_state - 1);
1007 if (sta->uploaded) {
1008 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1009 IEEE80211_STA_NOTEXIST);
1010 WARN_ON_ONCE(ret != 0);
1013 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1015 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1017 sta_set_sinfo(sta, sinfo, true);
1018 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1021 rate_control_remove_sta_debugfs(sta);
1022 ieee80211_sta_debugfs_remove(sta);
1024 cleanup_single_sta(sta);
1027 int __must_check __sta_info_destroy(struct sta_info *sta)
1029 int err = __sta_info_destroy_part1(sta);
1036 __sta_info_destroy_part2(sta);
1041 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1043 struct sta_info *sta;
1046 mutex_lock(&sdata->local->sta_mtx);
1047 sta = sta_info_get(sdata, addr);
1048 ret = __sta_info_destroy(sta);
1049 mutex_unlock(&sdata->local->sta_mtx);
1054 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1057 struct sta_info *sta;
1060 mutex_lock(&sdata->local->sta_mtx);
1061 sta = sta_info_get_bss(sdata, addr);
1062 ret = __sta_info_destroy(sta);
1063 mutex_unlock(&sdata->local->sta_mtx);
1068 static void sta_info_cleanup(struct timer_list *t)
1070 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1071 struct sta_info *sta;
1072 bool timer_needed = false;
1075 list_for_each_entry_rcu(sta, &local->sta_list, list)
1076 if (sta_info_cleanup_expire_buffered(local, sta))
1077 timer_needed = true;
1080 if (local->quiescing)
1086 mod_timer(&local->sta_cleanup,
1087 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1090 int sta_info_init(struct ieee80211_local *local)
1094 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1098 spin_lock_init(&local->tim_lock);
1099 mutex_init(&local->sta_mtx);
1100 INIT_LIST_HEAD(&local->sta_list);
1102 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1106 void sta_info_stop(struct ieee80211_local *local)
1108 del_timer_sync(&local->sta_cleanup);
1109 rhltable_destroy(&local->sta_hash);
1113 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1115 struct ieee80211_local *local = sdata->local;
1116 struct sta_info *sta, *tmp;
1117 LIST_HEAD(free_list);
1122 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1123 WARN_ON(vlans && !sdata->bss);
1125 mutex_lock(&local->sta_mtx);
1126 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1127 if (sdata == sta->sdata ||
1128 (vlans && sdata->bss == sta->sdata->bss)) {
1129 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1130 list_add(&sta->free_list, &free_list);
1135 if (!list_empty(&free_list)) {
1137 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1138 __sta_info_destroy_part2(sta);
1140 mutex_unlock(&local->sta_mtx);
1145 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1146 unsigned long exp_time)
1148 struct ieee80211_local *local = sdata->local;
1149 struct sta_info *sta, *tmp;
1151 mutex_lock(&local->sta_mtx);
1153 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1154 unsigned long last_active = ieee80211_sta_last_active(sta);
1156 if (sdata != sta->sdata)
1159 if (time_is_before_jiffies(last_active + exp_time)) {
1160 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1163 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1164 test_sta_flag(sta, WLAN_STA_PS_STA))
1165 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1167 WARN_ON(__sta_info_destroy(sta));
1171 mutex_unlock(&local->sta_mtx);
1174 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1176 const u8 *localaddr)
1178 struct ieee80211_local *local = hw_to_local(hw);
1179 struct rhlist_head *tmp;
1180 struct sta_info *sta;
1183 * Just return a random station if localaddr is NULL
1184 * ... first in list.
1186 for_each_sta_info(local, addr, sta, tmp) {
1188 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1197 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1199 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1202 struct sta_info *sta;
1207 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1216 EXPORT_SYMBOL(ieee80211_find_sta);
1218 /* powersave support code */
1219 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1221 struct ieee80211_sub_if_data *sdata = sta->sdata;
1222 struct ieee80211_local *local = sdata->local;
1223 struct sk_buff_head pending;
1224 int filtered = 0, buffered = 0, ac, i;
1225 unsigned long flags;
1228 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1229 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1232 if (sdata->vif.type == NL80211_IFTYPE_AP)
1233 ps = &sdata->bss->ps;
1234 else if (ieee80211_vif_is_mesh(&sdata->vif))
1235 ps = &sdata->u.mesh.ps;
1239 clear_sta_flag(sta, WLAN_STA_SP);
1241 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1242 sta->driver_buffered_tids = 0;
1243 sta->txq_buffered_tids = 0;
1245 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1246 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1248 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1249 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
1252 drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
1255 skb_queue_head_init(&pending);
1257 /* sync with ieee80211_tx_h_unicast_ps_buf */
1258 spin_lock(&sta->ps_lock);
1259 /* Send all buffered frames to the station */
1260 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1261 int count = skb_queue_len(&pending), tmp;
1263 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1264 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1265 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1266 tmp = skb_queue_len(&pending);
1267 filtered += tmp - count;
1270 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1271 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1272 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1273 tmp = skb_queue_len(&pending);
1274 buffered += tmp - count;
1277 ieee80211_add_pending_skbs(local, &pending);
1279 /* now we're no longer in the deliver code */
1280 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1282 /* The station might have polled and then woken up before we responded,
1283 * so clear these flags now to avoid them sticking around.
1285 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1286 clear_sta_flag(sta, WLAN_STA_UAPSD);
1287 spin_unlock(&sta->ps_lock);
1289 atomic_dec(&ps->num_sta_ps);
1291 /* This station just woke up and isn't aware of our SMPS state */
1292 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1293 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1294 sdata->smps_mode) &&
1295 sta->known_smps_mode != sdata->bss->req_smps &&
1296 sta_info_tx_streams(sta) != 1) {
1298 "%pM just woke up and MIMO capable - update SMPS\n",
1300 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1302 sdata->vif.bss_conf.bssid);
1305 local->total_ps_buffered -= buffered;
1307 sta_info_recalc_tim(sta);
1310 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1311 sta->sta.addr, sta->sta.aid, filtered, buffered);
1313 ieee80211_check_fast_xmit(sta);
1316 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1317 enum ieee80211_frame_release_type reason,
1318 bool call_driver, bool more_data)
1320 struct ieee80211_sub_if_data *sdata = sta->sdata;
1321 struct ieee80211_local *local = sdata->local;
1322 struct ieee80211_qos_hdr *nullfunc;
1323 struct sk_buff *skb;
1324 int size = sizeof(*nullfunc);
1326 bool qos = sta->sta.wme;
1327 struct ieee80211_tx_info *info;
1328 struct ieee80211_chanctx_conf *chanctx_conf;
1330 /* Don't send NDPs when STA is connected HE */
1331 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1332 !(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1336 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1337 IEEE80211_STYPE_QOS_NULLFUNC |
1338 IEEE80211_FCTL_FROMDS);
1341 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1342 IEEE80211_STYPE_NULLFUNC |
1343 IEEE80211_FCTL_FROMDS);
1346 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1350 skb_reserve(skb, local->hw.extra_tx_headroom);
1352 nullfunc = skb_put(skb, size);
1353 nullfunc->frame_control = fc;
1354 nullfunc->duration_id = 0;
1355 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1356 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1357 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1358 nullfunc->seq_ctrl = 0;
1360 skb->priority = tid;
1361 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1363 nullfunc->qos_ctrl = cpu_to_le16(tid);
1365 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1366 nullfunc->qos_ctrl |=
1367 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1369 nullfunc->frame_control |=
1370 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1374 info = IEEE80211_SKB_CB(skb);
1377 * Tell TX path to send this frame even though the
1378 * STA may still remain is PS mode after this frame
1379 * exchange. Also set EOSP to indicate this packet
1380 * ends the poll/service period.
1382 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1383 IEEE80211_TX_STATUS_EOSP |
1384 IEEE80211_TX_CTL_REQ_TX_STATUS;
1386 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1389 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1392 skb->dev = sdata->dev;
1395 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1396 if (WARN_ON(!chanctx_conf)) {
1402 info->band = chanctx_conf->def.chan->band;
1403 ieee80211_xmit(sdata, sta, skb, 0);
1407 static int find_highest_prio_tid(unsigned long tids)
1409 /* lower 3 TIDs aren't ordered perfectly */
1411 return fls(tids) - 1;
1412 /* TID 0 is BE just like TID 3 */
1415 return fls(tids) - 1;
1418 /* Indicates if the MORE_DATA bit should be set in the last
1419 * frame obtained by ieee80211_sta_ps_get_frames.
1420 * Note that driver_release_tids is relevant only if
1421 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1424 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1425 enum ieee80211_frame_release_type reason,
1426 unsigned long driver_release_tids)
1430 /* If the driver has data on more than one TID then
1431 * certainly there's more data if we release just a
1432 * single frame now (from a single TID). This will
1433 * only happen for PS-Poll.
1435 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1436 hweight16(driver_release_tids) > 1)
1439 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1440 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1443 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1444 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1452 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1453 enum ieee80211_frame_release_type reason,
1454 struct sk_buff_head *frames,
1455 unsigned long *driver_release_tids)
1457 struct ieee80211_sub_if_data *sdata = sta->sdata;
1458 struct ieee80211_local *local = sdata->local;
1461 /* Get response frame(s) and more data bit for the last one. */
1462 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1465 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1468 tids = ieee80211_tids_for_ac(ac);
1470 /* if we already have frames from software, then we can't also
1471 * release from hardware queues
1473 if (skb_queue_empty(frames)) {
1474 *driver_release_tids |=
1475 sta->driver_buffered_tids & tids;
1476 *driver_release_tids |= sta->txq_buffered_tids & tids;
1479 if (!*driver_release_tids) {
1480 struct sk_buff *skb;
1482 while (n_frames > 0) {
1483 skb = skb_dequeue(&sta->tx_filtered[ac]);
1486 &sta->ps_tx_buf[ac]);
1488 local->total_ps_buffered--;
1493 __skb_queue_tail(frames, skb);
1497 /* If we have more frames buffered on this AC, then abort the
1498 * loop since we can't send more data from other ACs before
1499 * the buffered frames from this.
1501 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1502 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1508 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1509 int n_frames, u8 ignored_acs,
1510 enum ieee80211_frame_release_type reason)
1512 struct ieee80211_sub_if_data *sdata = sta->sdata;
1513 struct ieee80211_local *local = sdata->local;
1514 unsigned long driver_release_tids = 0;
1515 struct sk_buff_head frames;
1518 /* Service or PS-Poll period starts */
1519 set_sta_flag(sta, WLAN_STA_SP);
1521 __skb_queue_head_init(&frames);
1523 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1524 &frames, &driver_release_tids);
1526 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1528 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1529 driver_release_tids =
1530 BIT(find_highest_prio_tid(driver_release_tids));
1532 if (skb_queue_empty(&frames) && !driver_release_tids) {
1536 * For PS-Poll, this can only happen due to a race condition
1537 * when we set the TIM bit and the station notices it, but
1538 * before it can poll for the frame we expire it.
1540 * For uAPSD, this is said in the standard (11.2.1.5 h):
1541 * At each unscheduled SP for a non-AP STA, the AP shall
1542 * attempt to transmit at least one MSDU or MMPDU, but no
1543 * more than the value specified in the Max SP Length field
1544 * in the QoS Capability element from delivery-enabled ACs,
1545 * that are destined for the non-AP STA.
1547 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1550 /* This will evaluate to 1, 3, 5 or 7. */
1551 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1552 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1556 ieee80211_send_null_response(sta, tid, reason, true, false);
1557 } else if (!driver_release_tids) {
1558 struct sk_buff_head pending;
1559 struct sk_buff *skb;
1562 bool need_null = false;
1564 skb_queue_head_init(&pending);
1566 while ((skb = __skb_dequeue(&frames))) {
1567 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1568 struct ieee80211_hdr *hdr = (void *) skb->data;
1574 * Tell TX path to send this frame even though the
1575 * STA may still remain is PS mode after this frame
1578 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1579 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1582 * Use MoreData flag to indicate whether there are
1583 * more buffered frames for this STA
1585 if (more_data || !skb_queue_empty(&frames))
1586 hdr->frame_control |=
1587 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1589 hdr->frame_control &=
1590 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1592 if (ieee80211_is_data_qos(hdr->frame_control) ||
1593 ieee80211_is_qos_nullfunc(hdr->frame_control))
1594 qoshdr = ieee80211_get_qos_ctl(hdr);
1596 tids |= BIT(skb->priority);
1598 __skb_queue_tail(&pending, skb);
1600 /* end service period after last frame or add one */
1601 if (!skb_queue_empty(&frames))
1604 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1605 /* for PS-Poll, there's only one frame */
1606 info->flags |= IEEE80211_TX_STATUS_EOSP |
1607 IEEE80211_TX_CTL_REQ_TX_STATUS;
1611 /* For uAPSD, things are a bit more complicated. If the
1612 * last frame has a QoS header (i.e. is a QoS-data or
1613 * QoS-nulldata frame) then just set the EOSP bit there
1615 * If the frame doesn't have a QoS header (which means
1616 * it should be a bufferable MMPDU) then we can't set
1617 * the EOSP bit in the QoS header; add a QoS-nulldata
1618 * frame to the list to send it after the MMPDU.
1620 * Note that this code is only in the mac80211-release
1621 * code path, we assume that the driver will not buffer
1622 * anything but QoS-data frames, or if it does, will
1623 * create the QoS-nulldata frame by itself if needed.
1625 * Cf. 802.11-2012 10.2.1.10 (c).
1628 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1630 info->flags |= IEEE80211_TX_STATUS_EOSP |
1631 IEEE80211_TX_CTL_REQ_TX_STATUS;
1633 /* The standard isn't completely clear on this
1634 * as it says the more-data bit should be set
1635 * if there are more BUs. The QoS-Null frame
1636 * we're about to send isn't buffered yet, we
1637 * only create it below, but let's pretend it
1638 * was buffered just in case some clients only
1639 * expect more-data=0 when eosp=1.
1641 hdr->frame_control |=
1642 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1649 drv_allow_buffered_frames(local, sta, tids, num,
1652 ieee80211_add_pending_skbs(local, &pending);
1655 ieee80211_send_null_response(
1656 sta, find_highest_prio_tid(tids),
1657 reason, false, false);
1659 sta_info_recalc_tim(sta);
1664 * We need to release a frame that is buffered somewhere in the
1665 * driver ... it'll have to handle that.
1666 * Note that the driver also has to check the number of frames
1667 * on the TIDs we're releasing from - if there are more than
1668 * n_frames it has to set the more-data bit (if we didn't ask
1669 * it to set it anyway due to other buffered frames); if there
1670 * are fewer than n_frames it has to make sure to adjust that
1671 * to allow the service period to end properly.
1673 drv_release_buffered_frames(local, sta, driver_release_tids,
1674 n_frames, reason, more_data);
1677 * Note that we don't recalculate the TIM bit here as it would
1678 * most likely have no effect at all unless the driver told us
1679 * that the TID(s) became empty before returning here from the
1681 * Either way, however, when the driver tells us that the TID(s)
1682 * became empty or we find that a txq became empty, we'll do the
1683 * TIM recalculation.
1686 if (!sta->sta.txq[0])
1689 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1690 if (!sta->sta.txq[tid] ||
1691 !(driver_release_tids & BIT(tid)) ||
1692 txq_has_queue(sta->sta.txq[tid]))
1695 sta_info_recalc_tim(sta);
1701 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1703 u8 ignore_for_response = sta->sta.uapsd_queues;
1706 * If all ACs are delivery-enabled then we should reply
1707 * from any of them, if only some are enabled we reply
1708 * only from the non-enabled ones.
1710 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1711 ignore_for_response = 0;
1713 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1714 IEEE80211_FRAME_RELEASE_PSPOLL);
1717 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1719 int n_frames = sta->sta.max_sp;
1720 u8 delivery_enabled = sta->sta.uapsd_queues;
1723 * If we ever grow support for TSPEC this might happen if
1724 * the TSPEC update from hostapd comes in between a trigger
1725 * frame setting WLAN_STA_UAPSD in the RX path and this
1726 * actually getting called.
1728 if (!delivery_enabled)
1731 switch (sta->sta.max_sp) {
1742 /* XXX: what is a good value? */
1747 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1748 IEEE80211_FRAME_RELEASE_UAPSD);
1751 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1752 struct ieee80211_sta *pubsta, bool block)
1754 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1756 trace_api_sta_block_awake(sta->local, pubsta, block);
1759 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1760 ieee80211_clear_fast_xmit(sta);
1764 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1767 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1768 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1769 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1770 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1771 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1772 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1773 /* must be asleep in this case */
1774 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1775 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1777 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1778 ieee80211_check_fast_xmit(sta);
1781 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1783 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1785 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1786 struct ieee80211_local *local = sta->local;
1788 trace_api_eosp(local, pubsta);
1790 clear_sta_flag(sta, WLAN_STA_SP);
1792 EXPORT_SYMBOL(ieee80211_sta_eosp);
1794 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1796 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1797 enum ieee80211_frame_release_type reason;
1800 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1802 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1803 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1806 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1808 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1810 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1811 u8 tid, bool buffered)
1813 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1815 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1818 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1821 set_bit(tid, &sta->driver_buffered_tids);
1823 clear_bit(tid, &sta->driver_buffered_tids);
1825 sta_info_recalc_tim(sta);
1827 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1829 int sta_info_move_state(struct sta_info *sta,
1830 enum ieee80211_sta_state new_state)
1834 if (sta->sta_state == new_state)
1837 /* check allowed transitions first */
1839 switch (new_state) {
1840 case IEEE80211_STA_NONE:
1841 if (sta->sta_state != IEEE80211_STA_AUTH)
1844 case IEEE80211_STA_AUTH:
1845 if (sta->sta_state != IEEE80211_STA_NONE &&
1846 sta->sta_state != IEEE80211_STA_ASSOC)
1849 case IEEE80211_STA_ASSOC:
1850 if (sta->sta_state != IEEE80211_STA_AUTH &&
1851 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1854 case IEEE80211_STA_AUTHORIZED:
1855 if (sta->sta_state != IEEE80211_STA_ASSOC)
1859 WARN(1, "invalid state %d", new_state);
1863 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1864 sta->sta.addr, new_state);
1867 * notify the driver before the actual changes so it can
1868 * fail the transition
1870 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1871 int err = drv_sta_state(sta->local, sta->sdata, sta,
1872 sta->sta_state, new_state);
1877 /* reflect the change in all state variables */
1879 switch (new_state) {
1880 case IEEE80211_STA_NONE:
1881 if (sta->sta_state == IEEE80211_STA_AUTH)
1882 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1884 case IEEE80211_STA_AUTH:
1885 if (sta->sta_state == IEEE80211_STA_NONE) {
1886 set_bit(WLAN_STA_AUTH, &sta->_flags);
1887 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1888 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1889 ieee80211_recalc_min_chandef(sta->sdata);
1890 if (!sta->sta.support_p2p_ps)
1891 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1894 case IEEE80211_STA_ASSOC:
1895 if (sta->sta_state == IEEE80211_STA_AUTH) {
1896 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1897 ieee80211_recalc_min_chandef(sta->sdata);
1898 if (!sta->sta.support_p2p_ps)
1899 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1900 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1901 ieee80211_vif_dec_num_mcast(sta->sdata);
1902 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1903 ieee80211_clear_fast_xmit(sta);
1904 ieee80211_clear_fast_rx(sta);
1907 case IEEE80211_STA_AUTHORIZED:
1908 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1909 ieee80211_vif_inc_num_mcast(sta->sdata);
1910 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1911 ieee80211_check_fast_xmit(sta);
1912 ieee80211_check_fast_rx(sta);
1919 sta->sta_state = new_state;
1924 u8 sta_info_tx_streams(struct sta_info *sta)
1926 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1929 if (!sta->sta.ht_cap.ht_supported)
1932 if (sta->sta.vht_cap.vht_supported) {
1935 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1937 for (i = 7; i >= 0; i--)
1938 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1939 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1943 if (ht_cap->mcs.rx_mask[3])
1945 else if (ht_cap->mcs.rx_mask[2])
1947 else if (ht_cap->mcs.rx_mask[1])
1952 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1955 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1956 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1959 static struct ieee80211_sta_rx_stats *
1960 sta_get_last_rx_stats(struct sta_info *sta)
1962 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
1963 struct ieee80211_local *local = sta->local;
1966 if (!ieee80211_hw_check(&local->hw, USES_RSS))
1969 for_each_possible_cpu(cpu) {
1970 struct ieee80211_sta_rx_stats *cpustats;
1972 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
1974 if (time_after(cpustats->last_rx, stats->last_rx))
1981 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
1982 struct rate_info *rinfo)
1984 rinfo->bw = STA_STATS_GET(BW, rate);
1986 switch (STA_STATS_GET(TYPE, rate)) {
1987 case STA_STATS_RATE_TYPE_VHT:
1988 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
1989 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
1990 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
1991 if (STA_STATS_GET(SGI, rate))
1992 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1994 case STA_STATS_RATE_TYPE_HT:
1995 rinfo->flags = RATE_INFO_FLAGS_MCS;
1996 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
1997 if (STA_STATS_GET(SGI, rate))
1998 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2000 case STA_STATS_RATE_TYPE_LEGACY: {
2001 struct ieee80211_supported_band *sband;
2004 int band = STA_STATS_GET(LEGACY_BAND, rate);
2005 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2007 sband = local->hw.wiphy->bands[band];
2008 brate = sband->bitrates[rate_idx].bitrate;
2009 if (rinfo->bw == RATE_INFO_BW_5)
2011 else if (rinfo->bw == RATE_INFO_BW_10)
2015 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2018 case STA_STATS_RATE_TYPE_HE:
2019 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2020 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2021 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2022 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2023 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2024 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2029 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2031 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2033 if (rate == STA_STATS_RATE_INVALID)
2036 sta_stats_decode_rate(sta->local, rate, rinfo);
2040 static void sta_set_tidstats(struct sta_info *sta,
2041 struct cfg80211_tid_stats *tidstats,
2044 struct ieee80211_local *local = sta->local;
2046 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2050 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2051 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2052 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2054 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2057 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2058 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2059 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2062 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2063 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2064 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2065 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2068 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2069 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2070 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2071 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2074 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2075 spin_lock_bh(&local->fq.lock);
2078 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2079 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2080 to_txq_info(sta->sta.txq[tid]));
2083 spin_unlock_bh(&local->fq.lock);
2087 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2093 start = u64_stats_fetch_begin(&rxstats->syncp);
2094 value = rxstats->bytes;
2095 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2100 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2103 struct ieee80211_sub_if_data *sdata = sta->sdata;
2104 struct ieee80211_local *local = sdata->local;
2107 struct ieee80211_sta_rx_stats *last_rxstats;
2109 last_rxstats = sta_get_last_rx_stats(sta);
2111 sinfo->generation = sdata->local->sta_generation;
2113 /* do before driver, so beacon filtering drivers have a
2114 * chance to e.g. just add the number of filtered beacons
2115 * (or just modify the value entirely, of course)
2117 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2118 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2120 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2122 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2123 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2124 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2125 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2126 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2128 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2129 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2130 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2133 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2134 sinfo->inactive_time =
2135 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2137 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2138 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2139 sinfo->tx_bytes = 0;
2140 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2141 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2142 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2145 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2146 sinfo->tx_packets = 0;
2147 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2148 sinfo->tx_packets += sta->tx_stats.packets[ac];
2149 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2152 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2153 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2154 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2156 if (sta->pcpu_rx_stats) {
2157 for_each_possible_cpu(cpu) {
2158 struct ieee80211_sta_rx_stats *cpurxs;
2160 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2161 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2165 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2168 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2169 sinfo->rx_packets = sta->rx_stats.packets;
2170 if (sta->pcpu_rx_stats) {
2171 for_each_possible_cpu(cpu) {
2172 struct ieee80211_sta_rx_stats *cpurxs;
2174 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2175 sinfo->rx_packets += cpurxs->packets;
2178 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2181 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2182 sinfo->tx_retries = sta->status_stats.retry_count;
2183 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2186 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2187 sinfo->tx_failed = sta->status_stats.retry_failed;
2188 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2191 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2192 if (sta->pcpu_rx_stats) {
2193 for_each_possible_cpu(cpu) {
2194 struct ieee80211_sta_rx_stats *cpurxs;
2196 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2197 sinfo->rx_dropped_misc += cpurxs->dropped;
2201 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2202 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2203 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2204 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2205 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2208 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2209 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2210 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2211 sinfo->signal = (s8)last_rxstats->last_signal;
2212 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2215 if (!sta->pcpu_rx_stats &&
2216 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2218 -ewma_signal_read(&sta->rx_stats_avg.signal);
2219 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2223 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2224 * the sta->rx_stats struct, so the check here is fine with and without
2227 if (last_rxstats->chains &&
2228 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2229 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2230 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2231 if (!sta->pcpu_rx_stats)
2232 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2234 sinfo->chains = last_rxstats->chains;
2236 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2237 sinfo->chain_signal[i] =
2238 last_rxstats->chain_signal_last[i];
2239 sinfo->chain_signal_avg[i] =
2240 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2244 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2245 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2247 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2250 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2251 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2252 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2255 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2256 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
2257 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
2259 sta_set_tidstats(sta, tidstats, i);
2263 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2264 #ifdef CONFIG_MAC80211_MESH
2265 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2266 BIT_ULL(NL80211_STA_INFO_PLID) |
2267 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2268 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2269 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2270 BIT_ULL(NL80211_STA_INFO_NONPEER_PM);
2272 sinfo->llid = sta->mesh->llid;
2273 sinfo->plid = sta->mesh->plid;
2274 sinfo->plink_state = sta->mesh->plink_state;
2275 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2276 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2277 sinfo->t_offset = sta->mesh->t_offset;
2279 sinfo->local_pm = sta->mesh->local_pm;
2280 sinfo->peer_pm = sta->mesh->peer_pm;
2281 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2285 sinfo->bss_param.flags = 0;
2286 if (sdata->vif.bss_conf.use_cts_prot)
2287 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2288 if (sdata->vif.bss_conf.use_short_preamble)
2289 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2290 if (sdata->vif.bss_conf.use_short_slot)
2291 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2292 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2293 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2295 sinfo->sta_flags.set = 0;
2296 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2297 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2298 BIT(NL80211_STA_FLAG_WME) |
2299 BIT(NL80211_STA_FLAG_MFP) |
2300 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2301 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2302 BIT(NL80211_STA_FLAG_TDLS_PEER);
2303 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2304 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2305 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2306 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2308 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2309 if (test_sta_flag(sta, WLAN_STA_MFP))
2310 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2311 if (test_sta_flag(sta, WLAN_STA_AUTH))
2312 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2313 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2314 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2315 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2316 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2318 thr = sta_get_expected_throughput(sta);
2321 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2322 sinfo->expected_throughput = thr;
2325 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2326 sta->status_stats.ack_signal_filled) {
2327 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2328 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2331 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2332 sta->status_stats.ack_signal_filled) {
2333 sinfo->avg_ack_signal =
2334 -(s8)ewma_avg_signal_read(
2335 &sta->status_stats.avg_ack_signal);
2337 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2341 u32 sta_get_expected_throughput(struct sta_info *sta)
2343 struct ieee80211_sub_if_data *sdata = sta->sdata;
2344 struct ieee80211_local *local = sdata->local;
2345 struct rate_control_ref *ref = NULL;
2348 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2349 ref = local->rate_ctrl;
2351 /* check if the driver has a SW RC implementation */
2352 if (ref && ref->ops->get_expected_throughput)
2353 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2355 thr = drv_get_expected_throughput(local, sta);
2360 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2362 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2364 if (time_after(stats->last_rx, sta->status_stats.last_ack))
2365 return stats->last_rx;
2366 return sta->status_stats.last_ack;
2369 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2371 if (!sta->sdata->local->ops->wake_tx_queue)
2374 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2375 sta->cparams.target = MS2TIME(50);
2376 sta->cparams.interval = MS2TIME(300);
2377 sta->cparams.ecn = false;
2379 sta->cparams.target = MS2TIME(20);
2380 sta->cparams.interval = MS2TIME(100);
2381 sta->cparams.ecn = true;
2385 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2388 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2390 sta_update_codel_params(sta, thr);