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 sta->mesh->plink_sta = sta;
333 spin_lock_init(&sta->mesh->plink_lock);
334 if (ieee80211_vif_is_mesh(&sdata->vif) &&
335 !sdata->u.mesh.user_mpm)
336 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
338 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
342 memcpy(sta->addr, addr, ETH_ALEN);
343 memcpy(sta->sta.addr, addr, ETH_ALEN);
344 sta->sta.max_rx_aggregation_subframes =
345 local->hw.max_rx_aggregation_subframes;
349 sta->rx_stats.last_rx = jiffies;
351 u64_stats_init(&sta->rx_stats.syncp);
353 sta->sta_state = IEEE80211_STA_NONE;
355 /* Mark TID as unreserved */
356 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
358 sta->last_connected = ktime_get_seconds();
359 ewma_signal_init(&sta->rx_stats_avg.signal);
360 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
361 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
363 if (local->ops->wake_tx_queue) {
365 int size = sizeof(struct txq_info) +
366 ALIGN(hw->txq_data_size, sizeof(void *));
368 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
372 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
373 struct txq_info *txq = txq_data + i * size;
375 ieee80211_txq_init(sdata, sta, txq, i);
379 if (sta_prepare_rate_control(local, sta, gfp))
382 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
384 * timer_to_tid must be initialized with identity mapping
385 * to enable session_timer's data differentiation. See
386 * sta_rx_agg_session_timer_expired for usage.
388 sta->timer_to_tid[i] = i;
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 #ifdef CONFIG_MAC80211_MESH
451 static int sta_info_insert_check(struct sta_info *sta)
453 struct ieee80211_sub_if_data *sdata = sta->sdata;
456 * Can't be a WARN_ON because it can be triggered through a race:
457 * something inserts a STA (on one CPU) without holding the RTNL
458 * and another CPU turns off the net device.
460 if (unlikely(!ieee80211_sdata_running(sdata)))
463 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
464 is_multicast_ether_addr(sta->sta.addr)))
467 /* The RCU read lock is required by rhashtable due to
468 * asynchronous resize/rehash. We also require the mutex
472 lockdep_assert_held(&sdata->local->sta_mtx);
473 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
474 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
483 static int sta_info_insert_drv_state(struct ieee80211_local *local,
484 struct ieee80211_sub_if_data *sdata,
485 struct sta_info *sta)
487 enum ieee80211_sta_state state;
490 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
491 err = drv_sta_state(local, sdata, sta, state, state + 1);
498 * Drivers using legacy sta_add/sta_remove callbacks only
499 * get uploaded set to true after sta_add is called.
501 if (!local->ops->sta_add)
502 sta->uploaded = true;
506 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
508 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
509 sta->sta.addr, state + 1, err);
513 /* unwind on error */
514 for (; state > IEEE80211_STA_NOTEXIST; state--)
515 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
521 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
523 struct ieee80211_local *local = sdata->local;
524 bool allow_p2p_go_ps = sdata->vif.p2p;
525 struct sta_info *sta;
528 list_for_each_entry_rcu(sta, &local->sta_list, list) {
529 if (sdata != sta->sdata ||
530 !test_sta_flag(sta, WLAN_STA_ASSOC))
532 if (!sta->sta.support_p2p_ps) {
533 allow_p2p_go_ps = false;
539 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
540 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
541 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
546 * should be called with sta_mtx locked
547 * this function replaces the mutex lock
550 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
552 struct ieee80211_local *local = sta->local;
553 struct ieee80211_sub_if_data *sdata = sta->sdata;
554 struct station_info *sinfo = NULL;
557 lockdep_assert_held(&local->sta_mtx);
559 /* check if STA exists already */
560 if (sta_info_get_bss(sdata, sta->sta.addr)) {
565 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
572 local->sta_generation++;
575 /* simplify things and don't accept BA sessions yet */
576 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
578 /* make the station visible */
579 err = sta_info_hash_add(local, sta);
583 list_add_tail_rcu(&sta->list, &local->sta_list);
586 err = sta_info_insert_drv_state(local, sdata, sta);
590 set_sta_flag(sta, WLAN_STA_INSERTED);
592 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
593 ieee80211_recalc_min_chandef(sta->sdata);
594 if (!sta->sta.support_p2p_ps)
595 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
598 /* accept BA sessions now */
599 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
601 ieee80211_sta_debugfs_add(sta);
602 rate_control_add_sta_debugfs(sta);
604 sinfo->generation = local->sta_generation;
605 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
608 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
610 /* move reference to rcu-protected */
612 mutex_unlock(&local->sta_mtx);
614 if (ieee80211_vif_is_mesh(&sdata->vif))
615 mesh_accept_plinks_update(sdata);
619 sta_info_hash_del(local, sta);
620 list_del_rcu(&sta->list);
624 __cleanup_single_sta(sta);
626 mutex_unlock(&local->sta_mtx);
632 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
634 struct ieee80211_local *local = sta->local;
639 mutex_lock(&local->sta_mtx);
641 err = sta_info_insert_check(sta);
643 mutex_unlock(&local->sta_mtx);
648 err = sta_info_insert_finish(sta);
654 sta_info_free(local, sta);
658 int sta_info_insert(struct sta_info *sta)
660 int err = sta_info_insert_rcu(sta);
667 static inline void __bss_tim_set(u8 *tim, u16 id)
670 * This format has been mandated by the IEEE specifications,
671 * so this line may not be changed to use the __set_bit() format.
673 tim[id / 8] |= (1 << (id % 8));
676 static inline void __bss_tim_clear(u8 *tim, u16 id)
679 * This format has been mandated by the IEEE specifications,
680 * so this line may not be changed to use the __clear_bit() format.
682 tim[id / 8] &= ~(1 << (id % 8));
685 static inline bool __bss_tim_get(u8 *tim, u16 id)
688 * This format has been mandated by the IEEE specifications,
689 * so this line may not be changed to use the test_bit() format.
691 return tim[id / 8] & (1 << (id % 8));
694 static unsigned long ieee80211_tids_for_ac(int ac)
696 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
698 case IEEE80211_AC_VO:
699 return BIT(6) | BIT(7);
700 case IEEE80211_AC_VI:
701 return BIT(4) | BIT(5);
702 case IEEE80211_AC_BE:
703 return BIT(0) | BIT(3);
704 case IEEE80211_AC_BK:
705 return BIT(1) | BIT(2);
712 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
714 struct ieee80211_local *local = sta->local;
716 bool indicate_tim = false;
717 u8 ignore_for_tim = sta->sta.uapsd_queues;
719 u16 id = sta->sta.aid;
721 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
722 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
723 if (WARN_ON_ONCE(!sta->sdata->bss))
726 ps = &sta->sdata->bss->ps;
727 #ifdef CONFIG_MAC80211_MESH
728 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
729 ps = &sta->sdata->u.mesh.ps;
735 /* No need to do anything if the driver does all */
736 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
743 * If all ACs are delivery-enabled then we should build
744 * the TIM bit for all ACs anyway; if only some are then
745 * we ignore those and build the TIM bit using only the
748 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
752 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
754 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
757 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
760 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
761 !skb_queue_empty(&sta->ps_tx_buf[ac]);
765 tids = ieee80211_tids_for_ac(ac);
768 sta->driver_buffered_tids & tids;
770 sta->txq_buffered_tids & tids;
774 spin_lock_bh(&local->tim_lock);
776 if (indicate_tim == __bss_tim_get(ps->tim, id))
780 __bss_tim_set(ps->tim, id);
782 __bss_tim_clear(ps->tim, id);
784 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
785 local->tim_in_locked_section = true;
786 drv_set_tim(local, &sta->sta, indicate_tim);
787 local->tim_in_locked_section = false;
791 spin_unlock_bh(&local->tim_lock);
794 void sta_info_recalc_tim(struct sta_info *sta)
796 __sta_info_recalc_tim(sta, false);
799 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
801 struct ieee80211_tx_info *info;
807 info = IEEE80211_SKB_CB(skb);
809 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
810 timeout = (sta->listen_interval *
811 sta->sdata->vif.bss_conf.beacon_int *
813 if (timeout < STA_TX_BUFFER_EXPIRE)
814 timeout = STA_TX_BUFFER_EXPIRE;
815 return time_after(jiffies, info->control.jiffies + timeout);
819 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
820 struct sta_info *sta, int ac)
826 * First check for frames that should expire on the filtered
827 * queue. Frames here were rejected by the driver and are on
828 * a separate queue to avoid reordering with normal PS-buffered
829 * frames. They also aren't accounted for right now in the
830 * total_ps_buffered counter.
833 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
834 skb = skb_peek(&sta->tx_filtered[ac]);
835 if (sta_info_buffer_expired(sta, skb))
836 skb = __skb_dequeue(&sta->tx_filtered[ac]);
839 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
842 * Frames are queued in order, so if this one
843 * hasn't expired yet we can stop testing. If
844 * we actually reached the end of the queue we
845 * also need to stop, of course.
849 ieee80211_free_txskb(&local->hw, skb);
853 * Now also check the normal PS-buffered queue, this will
854 * only find something if the filtered queue was emptied
855 * since the filtered frames are all before the normal PS
859 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
860 skb = skb_peek(&sta->ps_tx_buf[ac]);
861 if (sta_info_buffer_expired(sta, skb))
862 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
865 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
868 * frames are queued in order, so if this one
869 * hasn't expired yet (or we reached the end of
870 * the queue) we can stop testing
875 local->total_ps_buffered--;
876 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
878 ieee80211_free_txskb(&local->hw, skb);
882 * Finally, recalculate the TIM bit for this station -- it might
883 * now be clear because the station was too slow to retrieve its
886 sta_info_recalc_tim(sta);
889 * Return whether there are any frames still buffered, this is
890 * used to check whether the cleanup timer still needs to run,
891 * if there are no frames we don't need to rearm the timer.
893 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
894 skb_queue_empty(&sta->tx_filtered[ac]));
897 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
898 struct sta_info *sta)
900 bool have_buffered = false;
903 /* This is only necessary for stations on BSS/MBSS interfaces */
904 if (!sta->sdata->bss &&
905 !ieee80211_vif_is_mesh(&sta->sdata->vif))
908 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
910 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
912 return have_buffered;
915 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
917 struct ieee80211_local *local;
918 struct ieee80211_sub_if_data *sdata;
929 lockdep_assert_held(&local->sta_mtx);
932 * Before removing the station from the driver and
933 * rate control, it might still start new aggregation
934 * sessions -- block that to make sure the tear-down
935 * will be sufficient.
937 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
938 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
941 * Before removing the station from the driver there might be pending
942 * rx frames on RSS queues sent prior to the disassociation - wait for
943 * all such frames to be processed.
945 drv_sync_rx_queues(local, sta);
947 ret = sta_info_hash_del(local, sta);
952 * for TDLS peers, make sure to return to the base channel before
955 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
956 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
957 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
960 list_del_rcu(&sta->list);
963 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
965 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
966 rcu_access_pointer(sdata->u.vlan.sta) == sta)
967 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
972 static void __sta_info_destroy_part2(struct sta_info *sta)
974 struct ieee80211_local *local = sta->local;
975 struct ieee80211_sub_if_data *sdata = sta->sdata;
976 struct station_info *sinfo;
980 * NOTE: This assumes at least synchronize_net() was done
981 * after _part1 and before _part2!
985 lockdep_assert_held(&local->sta_mtx);
987 /* now keys can no longer be reached */
988 ieee80211_free_sta_keys(local, sta);
990 /* disable TIM bit - last chance to tell driver */
991 __sta_info_recalc_tim(sta, true);
996 local->sta_generation++;
998 while (sta->sta_state > IEEE80211_STA_NONE) {
999 ret = sta_info_move_state(sta, sta->sta_state - 1);
1006 if (sta->uploaded) {
1007 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1008 IEEE80211_STA_NOTEXIST);
1009 WARN_ON_ONCE(ret != 0);
1012 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1014 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1016 sta_set_sinfo(sta, sinfo);
1017 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1020 rate_control_remove_sta_debugfs(sta);
1021 ieee80211_sta_debugfs_remove(sta);
1023 cleanup_single_sta(sta);
1026 int __must_check __sta_info_destroy(struct sta_info *sta)
1028 int err = __sta_info_destroy_part1(sta);
1035 __sta_info_destroy_part2(sta);
1040 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1042 struct sta_info *sta;
1045 mutex_lock(&sdata->local->sta_mtx);
1046 sta = sta_info_get(sdata, addr);
1047 ret = __sta_info_destroy(sta);
1048 mutex_unlock(&sdata->local->sta_mtx);
1053 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1056 struct sta_info *sta;
1059 mutex_lock(&sdata->local->sta_mtx);
1060 sta = sta_info_get_bss(sdata, addr);
1061 ret = __sta_info_destroy(sta);
1062 mutex_unlock(&sdata->local->sta_mtx);
1067 static void sta_info_cleanup(unsigned long data)
1069 struct ieee80211_local *local = (struct ieee80211_local *) data;
1070 struct sta_info *sta;
1071 bool timer_needed = false;
1074 list_for_each_entry_rcu(sta, &local->sta_list, list)
1075 if (sta_info_cleanup_expire_buffered(local, sta))
1076 timer_needed = true;
1079 if (local->quiescing)
1085 mod_timer(&local->sta_cleanup,
1086 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1089 int sta_info_init(struct ieee80211_local *local)
1093 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1097 spin_lock_init(&local->tim_lock);
1098 mutex_init(&local->sta_mtx);
1099 INIT_LIST_HEAD(&local->sta_list);
1101 setup_timer(&local->sta_cleanup, sta_info_cleanup,
1102 (unsigned long)local);
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 if (sta->sta.txq[0]) {
1249 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1250 if (!txq_has_queue(sta->sta.txq[i]))
1253 drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
1257 skb_queue_head_init(&pending);
1259 /* sync with ieee80211_tx_h_unicast_ps_buf */
1260 spin_lock(&sta->ps_lock);
1261 /* Send all buffered frames to the station */
1262 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1263 int count = skb_queue_len(&pending), tmp;
1265 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1266 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1267 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1268 tmp = skb_queue_len(&pending);
1269 filtered += tmp - count;
1272 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1273 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1274 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1275 tmp = skb_queue_len(&pending);
1276 buffered += tmp - count;
1279 ieee80211_add_pending_skbs(local, &pending);
1281 /* now we're no longer in the deliver code */
1282 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1284 /* The station might have polled and then woken up before we responded,
1285 * so clear these flags now to avoid them sticking around.
1287 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1288 clear_sta_flag(sta, WLAN_STA_UAPSD);
1289 spin_unlock(&sta->ps_lock);
1291 atomic_dec(&ps->num_sta_ps);
1293 /* This station just woke up and isn't aware of our SMPS state */
1294 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1295 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1296 sdata->smps_mode) &&
1297 sta->known_smps_mode != sdata->bss->req_smps &&
1298 sta_info_tx_streams(sta) != 1) {
1300 "%pM just woke up and MIMO capable - update SMPS\n",
1302 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1304 sdata->vif.bss_conf.bssid);
1307 local->total_ps_buffered -= buffered;
1309 sta_info_recalc_tim(sta);
1312 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1313 sta->sta.addr, sta->sta.aid, filtered, buffered);
1315 ieee80211_check_fast_xmit(sta);
1318 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1319 enum ieee80211_frame_release_type reason,
1320 bool call_driver, bool more_data)
1322 struct ieee80211_sub_if_data *sdata = sta->sdata;
1323 struct ieee80211_local *local = sdata->local;
1324 struct ieee80211_qos_hdr *nullfunc;
1325 struct sk_buff *skb;
1326 int size = sizeof(*nullfunc);
1328 bool qos = sta->sta.wme;
1329 struct ieee80211_tx_info *info;
1330 struct ieee80211_chanctx_conf *chanctx_conf;
1333 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1334 IEEE80211_STYPE_QOS_NULLFUNC |
1335 IEEE80211_FCTL_FROMDS);
1338 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1339 IEEE80211_STYPE_NULLFUNC |
1340 IEEE80211_FCTL_FROMDS);
1343 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1347 skb_reserve(skb, local->hw.extra_tx_headroom);
1349 nullfunc = skb_put(skb, size);
1350 nullfunc->frame_control = fc;
1351 nullfunc->duration_id = 0;
1352 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1353 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1354 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1355 nullfunc->seq_ctrl = 0;
1357 skb->priority = tid;
1358 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1360 nullfunc->qos_ctrl = cpu_to_le16(tid);
1362 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1363 nullfunc->qos_ctrl |=
1364 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1366 nullfunc->frame_control |=
1367 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1371 info = IEEE80211_SKB_CB(skb);
1374 * Tell TX path to send this frame even though the
1375 * STA may still remain is PS mode after this frame
1376 * exchange. Also set EOSP to indicate this packet
1377 * ends the poll/service period.
1379 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1380 IEEE80211_TX_STATUS_EOSP |
1381 IEEE80211_TX_CTL_REQ_TX_STATUS;
1383 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1386 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1389 skb->dev = sdata->dev;
1392 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1393 if (WARN_ON(!chanctx_conf)) {
1399 info->band = chanctx_conf->def.chan->band;
1400 ieee80211_xmit(sdata, sta, skb);
1404 static int find_highest_prio_tid(unsigned long tids)
1406 /* lower 3 TIDs aren't ordered perfectly */
1408 return fls(tids) - 1;
1409 /* TID 0 is BE just like TID 3 */
1412 return fls(tids) - 1;
1415 /* Indicates if the MORE_DATA bit should be set in the last
1416 * frame obtained by ieee80211_sta_ps_get_frames.
1417 * Note that driver_release_tids is relevant only if
1418 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1421 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1422 enum ieee80211_frame_release_type reason,
1423 unsigned long driver_release_tids)
1427 /* If the driver has data on more than one TID then
1428 * certainly there's more data if we release just a
1429 * single frame now (from a single TID). This will
1430 * only happen for PS-Poll.
1432 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1433 hweight16(driver_release_tids) > 1)
1436 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1437 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1440 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1441 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1449 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1450 enum ieee80211_frame_release_type reason,
1451 struct sk_buff_head *frames,
1452 unsigned long *driver_release_tids)
1454 struct ieee80211_sub_if_data *sdata = sta->sdata;
1455 struct ieee80211_local *local = sdata->local;
1458 /* Get response frame(s) and more data bit for the last one. */
1459 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1462 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1465 tids = ieee80211_tids_for_ac(ac);
1467 /* if we already have frames from software, then we can't also
1468 * release from hardware queues
1470 if (skb_queue_empty(frames)) {
1471 *driver_release_tids |=
1472 sta->driver_buffered_tids & tids;
1473 *driver_release_tids |= sta->txq_buffered_tids & tids;
1476 if (!*driver_release_tids) {
1477 struct sk_buff *skb;
1479 while (n_frames > 0) {
1480 skb = skb_dequeue(&sta->tx_filtered[ac]);
1483 &sta->ps_tx_buf[ac]);
1485 local->total_ps_buffered--;
1490 __skb_queue_tail(frames, skb);
1494 /* If we have more frames buffered on this AC, then abort the
1495 * loop since we can't send more data from other ACs before
1496 * the buffered frames from this.
1498 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1499 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1505 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1506 int n_frames, u8 ignored_acs,
1507 enum ieee80211_frame_release_type reason)
1509 struct ieee80211_sub_if_data *sdata = sta->sdata;
1510 struct ieee80211_local *local = sdata->local;
1511 unsigned long driver_release_tids = 0;
1512 struct sk_buff_head frames;
1515 /* Service or PS-Poll period starts */
1516 set_sta_flag(sta, WLAN_STA_SP);
1518 __skb_queue_head_init(&frames);
1520 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1521 &frames, &driver_release_tids);
1523 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1525 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1526 driver_release_tids =
1527 BIT(find_highest_prio_tid(driver_release_tids));
1529 if (skb_queue_empty(&frames) && !driver_release_tids) {
1533 * For PS-Poll, this can only happen due to a race condition
1534 * when we set the TIM bit and the station notices it, but
1535 * before it can poll for the frame we expire it.
1537 * For uAPSD, this is said in the standard (11.2.1.5 h):
1538 * At each unscheduled SP for a non-AP STA, the AP shall
1539 * attempt to transmit at least one MSDU or MMPDU, but no
1540 * more than the value specified in the Max SP Length field
1541 * in the QoS Capability element from delivery-enabled ACs,
1542 * that are destined for the non-AP STA.
1544 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1547 /* This will evaluate to 1, 3, 5 or 7. */
1548 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1549 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1553 ieee80211_send_null_response(sta, tid, reason, true, false);
1554 } else if (!driver_release_tids) {
1555 struct sk_buff_head pending;
1556 struct sk_buff *skb;
1559 bool need_null = false;
1561 skb_queue_head_init(&pending);
1563 while ((skb = __skb_dequeue(&frames))) {
1564 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1565 struct ieee80211_hdr *hdr = (void *) skb->data;
1571 * Tell TX path to send this frame even though the
1572 * STA may still remain is PS mode after this frame
1575 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1576 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1579 * Use MoreData flag to indicate whether there are
1580 * more buffered frames for this STA
1582 if (more_data || !skb_queue_empty(&frames))
1583 hdr->frame_control |=
1584 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1586 hdr->frame_control &=
1587 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1589 if (ieee80211_is_data_qos(hdr->frame_control) ||
1590 ieee80211_is_qos_nullfunc(hdr->frame_control))
1591 qoshdr = ieee80211_get_qos_ctl(hdr);
1593 tids |= BIT(skb->priority);
1595 __skb_queue_tail(&pending, skb);
1597 /* end service period after last frame or add one */
1598 if (!skb_queue_empty(&frames))
1601 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1602 /* for PS-Poll, there's only one frame */
1603 info->flags |= IEEE80211_TX_STATUS_EOSP |
1604 IEEE80211_TX_CTL_REQ_TX_STATUS;
1608 /* For uAPSD, things are a bit more complicated. If the
1609 * last frame has a QoS header (i.e. is a QoS-data or
1610 * QoS-nulldata frame) then just set the EOSP bit there
1612 * If the frame doesn't have a QoS header (which means
1613 * it should be a bufferable MMPDU) then we can't set
1614 * the EOSP bit in the QoS header; add a QoS-nulldata
1615 * frame to the list to send it after the MMPDU.
1617 * Note that this code is only in the mac80211-release
1618 * code path, we assume that the driver will not buffer
1619 * anything but QoS-data frames, or if it does, will
1620 * create the QoS-nulldata frame by itself if needed.
1622 * Cf. 802.11-2012 10.2.1.10 (c).
1625 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1627 info->flags |= IEEE80211_TX_STATUS_EOSP |
1628 IEEE80211_TX_CTL_REQ_TX_STATUS;
1630 /* The standard isn't completely clear on this
1631 * as it says the more-data bit should be set
1632 * if there are more BUs. The QoS-Null frame
1633 * we're about to send isn't buffered yet, we
1634 * only create it below, but let's pretend it
1635 * was buffered just in case some clients only
1636 * expect more-data=0 when eosp=1.
1638 hdr->frame_control |=
1639 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1646 drv_allow_buffered_frames(local, sta, tids, num,
1649 ieee80211_add_pending_skbs(local, &pending);
1652 ieee80211_send_null_response(
1653 sta, find_highest_prio_tid(tids),
1654 reason, false, false);
1656 sta_info_recalc_tim(sta);
1661 * We need to release a frame that is buffered somewhere in the
1662 * driver ... it'll have to handle that.
1663 * Note that the driver also has to check the number of frames
1664 * on the TIDs we're releasing from - if there are more than
1665 * n_frames it has to set the more-data bit (if we didn't ask
1666 * it to set it anyway due to other buffered frames); if there
1667 * are fewer than n_frames it has to make sure to adjust that
1668 * to allow the service period to end properly.
1670 drv_release_buffered_frames(local, sta, driver_release_tids,
1671 n_frames, reason, more_data);
1674 * Note that we don't recalculate the TIM bit here as it would
1675 * most likely have no effect at all unless the driver told us
1676 * that the TID(s) became empty before returning here from the
1678 * Either way, however, when the driver tells us that the TID(s)
1679 * became empty or we find that a txq became empty, we'll do the
1680 * TIM recalculation.
1683 if (!sta->sta.txq[0])
1686 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1687 if (!(driver_release_tids & BIT(tid)) ||
1688 txq_has_queue(sta->sta.txq[tid]))
1691 sta_info_recalc_tim(sta);
1697 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1699 u8 ignore_for_response = sta->sta.uapsd_queues;
1702 * If all ACs are delivery-enabled then we should reply
1703 * from any of them, if only some are enabled we reply
1704 * only from the non-enabled ones.
1706 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1707 ignore_for_response = 0;
1709 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1710 IEEE80211_FRAME_RELEASE_PSPOLL);
1713 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1715 int n_frames = sta->sta.max_sp;
1716 u8 delivery_enabled = sta->sta.uapsd_queues;
1719 * If we ever grow support for TSPEC this might happen if
1720 * the TSPEC update from hostapd comes in between a trigger
1721 * frame setting WLAN_STA_UAPSD in the RX path and this
1722 * actually getting called.
1724 if (!delivery_enabled)
1727 switch (sta->sta.max_sp) {
1738 /* XXX: what is a good value? */
1743 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1744 IEEE80211_FRAME_RELEASE_UAPSD);
1747 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1748 struct ieee80211_sta *pubsta, bool block)
1750 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1752 trace_api_sta_block_awake(sta->local, pubsta, block);
1755 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1756 ieee80211_clear_fast_xmit(sta);
1760 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1763 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1764 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1765 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1766 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1767 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1768 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1769 /* must be asleep in this case */
1770 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1771 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1773 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1774 ieee80211_check_fast_xmit(sta);
1777 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1779 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1781 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1782 struct ieee80211_local *local = sta->local;
1784 trace_api_eosp(local, pubsta);
1786 clear_sta_flag(sta, WLAN_STA_SP);
1788 EXPORT_SYMBOL(ieee80211_sta_eosp);
1790 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1792 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1793 enum ieee80211_frame_release_type reason;
1796 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1798 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1799 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1802 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1804 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1806 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1807 u8 tid, bool buffered)
1809 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1811 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1814 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1817 set_bit(tid, &sta->driver_buffered_tids);
1819 clear_bit(tid, &sta->driver_buffered_tids);
1821 sta_info_recalc_tim(sta);
1823 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1825 int sta_info_move_state(struct sta_info *sta,
1826 enum ieee80211_sta_state new_state)
1830 if (sta->sta_state == new_state)
1833 /* check allowed transitions first */
1835 switch (new_state) {
1836 case IEEE80211_STA_NONE:
1837 if (sta->sta_state != IEEE80211_STA_AUTH)
1840 case IEEE80211_STA_AUTH:
1841 if (sta->sta_state != IEEE80211_STA_NONE &&
1842 sta->sta_state != IEEE80211_STA_ASSOC)
1845 case IEEE80211_STA_ASSOC:
1846 if (sta->sta_state != IEEE80211_STA_AUTH &&
1847 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1850 case IEEE80211_STA_AUTHORIZED:
1851 if (sta->sta_state != IEEE80211_STA_ASSOC)
1855 WARN(1, "invalid state %d", new_state);
1859 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1860 sta->sta.addr, new_state);
1863 * notify the driver before the actual changes so it can
1864 * fail the transition
1866 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1867 int err = drv_sta_state(sta->local, sta->sdata, sta,
1868 sta->sta_state, new_state);
1873 /* reflect the change in all state variables */
1875 switch (new_state) {
1876 case IEEE80211_STA_NONE:
1877 if (sta->sta_state == IEEE80211_STA_AUTH)
1878 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1880 case IEEE80211_STA_AUTH:
1881 if (sta->sta_state == IEEE80211_STA_NONE) {
1882 set_bit(WLAN_STA_AUTH, &sta->_flags);
1883 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1884 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1885 ieee80211_recalc_min_chandef(sta->sdata);
1886 if (!sta->sta.support_p2p_ps)
1887 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1890 case IEEE80211_STA_ASSOC:
1891 if (sta->sta_state == IEEE80211_STA_AUTH) {
1892 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1893 ieee80211_recalc_min_chandef(sta->sdata);
1894 if (!sta->sta.support_p2p_ps)
1895 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1896 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1897 ieee80211_vif_dec_num_mcast(sta->sdata);
1898 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1899 ieee80211_clear_fast_xmit(sta);
1900 ieee80211_clear_fast_rx(sta);
1903 case IEEE80211_STA_AUTHORIZED:
1904 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1905 ieee80211_vif_inc_num_mcast(sta->sdata);
1906 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1907 ieee80211_check_fast_xmit(sta);
1908 ieee80211_check_fast_rx(sta);
1915 sta->sta_state = new_state;
1920 u8 sta_info_tx_streams(struct sta_info *sta)
1922 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1925 if (!sta->sta.ht_cap.ht_supported)
1928 if (sta->sta.vht_cap.vht_supported) {
1931 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1933 for (i = 7; i >= 0; i--)
1934 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1935 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1939 if (ht_cap->mcs.rx_mask[3])
1941 else if (ht_cap->mcs.rx_mask[2])
1943 else if (ht_cap->mcs.rx_mask[1])
1948 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1951 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1952 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1955 static struct ieee80211_sta_rx_stats *
1956 sta_get_last_rx_stats(struct sta_info *sta)
1958 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
1959 struct ieee80211_local *local = sta->local;
1962 if (!ieee80211_hw_check(&local->hw, USES_RSS))
1965 for_each_possible_cpu(cpu) {
1966 struct ieee80211_sta_rx_stats *cpustats;
1968 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
1970 if (time_after(cpustats->last_rx, stats->last_rx))
1977 static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate,
1978 struct rate_info *rinfo)
1980 rinfo->bw = STA_STATS_GET(BW, rate);
1982 switch (STA_STATS_GET(TYPE, rate)) {
1983 case STA_STATS_RATE_TYPE_VHT:
1984 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
1985 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
1986 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
1987 if (STA_STATS_GET(SGI, rate))
1988 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1990 case STA_STATS_RATE_TYPE_HT:
1991 rinfo->flags = RATE_INFO_FLAGS_MCS;
1992 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
1993 if (STA_STATS_GET(SGI, rate))
1994 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1996 case STA_STATS_RATE_TYPE_LEGACY: {
1997 struct ieee80211_supported_band *sband;
2000 int band = STA_STATS_GET(LEGACY_BAND, rate);
2001 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2004 sband = local->hw.wiphy->bands[band];
2005 brate = sband->bitrates[rate_idx].bitrate;
2006 if (rinfo->bw == RATE_INFO_BW_5)
2008 else if (rinfo->bw == RATE_INFO_BW_10)
2012 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2018 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2020 u16 rate = ACCESS_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2022 if (rate == STA_STATS_RATE_INVALID)
2025 sta_stats_decode_rate(sta->local, rate, rinfo);
2029 static void sta_set_tidstats(struct sta_info *sta,
2030 struct cfg80211_tid_stats *tidstats,
2033 struct ieee80211_local *local = sta->local;
2035 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2039 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2040 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2041 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2043 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2046 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2047 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2048 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2051 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2052 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2053 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2054 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2057 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2058 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2059 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2060 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2064 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2070 start = u64_stats_fetch_begin(&rxstats->syncp);
2071 value = rxstats->bytes;
2072 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2077 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
2079 struct ieee80211_sub_if_data *sdata = sta->sdata;
2080 struct ieee80211_local *local = sdata->local;
2083 struct ieee80211_sta_rx_stats *last_rxstats;
2085 last_rxstats = sta_get_last_rx_stats(sta);
2087 sinfo->generation = sdata->local->sta_generation;
2089 /* do before driver, so beacon filtering drivers have a
2090 * chance to e.g. just add the number of filtered beacons
2091 * (or just modify the value entirely, of course)
2093 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2094 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2096 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2098 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
2099 BIT(NL80211_STA_INFO_STA_FLAGS) |
2100 BIT(NL80211_STA_INFO_BSS_PARAM) |
2101 BIT(NL80211_STA_INFO_CONNECTED_TIME) |
2102 BIT(NL80211_STA_INFO_RX_DROP_MISC);
2104 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2105 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2106 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
2109 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2110 sinfo->inactive_time =
2111 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2113 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
2114 BIT(NL80211_STA_INFO_TX_BYTES)))) {
2115 sinfo->tx_bytes = 0;
2116 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2117 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2118 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
2121 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
2122 sinfo->tx_packets = 0;
2123 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2124 sinfo->tx_packets += sta->tx_stats.packets[ac];
2125 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
2128 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
2129 BIT(NL80211_STA_INFO_RX_BYTES)))) {
2130 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2132 if (sta->pcpu_rx_stats) {
2133 for_each_possible_cpu(cpu) {
2134 struct ieee80211_sta_rx_stats *cpurxs;
2136 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2137 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2141 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
2144 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
2145 sinfo->rx_packets = sta->rx_stats.packets;
2146 if (sta->pcpu_rx_stats) {
2147 for_each_possible_cpu(cpu) {
2148 struct ieee80211_sta_rx_stats *cpurxs;
2150 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2151 sinfo->rx_packets += cpurxs->packets;
2154 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
2157 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
2158 sinfo->tx_retries = sta->status_stats.retry_count;
2159 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
2162 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
2163 sinfo->tx_failed = sta->status_stats.retry_failed;
2164 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
2167 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2168 if (sta->pcpu_rx_stats) {
2169 for_each_possible_cpu(cpu) {
2170 struct ieee80211_sta_rx_stats *cpurxs;
2172 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2173 sinfo->rx_dropped_misc += cpurxs->dropped;
2177 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2178 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2179 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
2180 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2181 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2184 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2185 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2186 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
2187 sinfo->signal = (s8)last_rxstats->last_signal;
2188 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
2191 if (!sta->pcpu_rx_stats &&
2192 !(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
2194 -ewma_signal_read(&sta->rx_stats_avg.signal);
2195 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
2199 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2200 * the sta->rx_stats struct, so the check here is fine with and without
2203 if (last_rxstats->chains &&
2204 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
2205 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2206 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL);
2207 if (!sta->pcpu_rx_stats)
2208 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2210 sinfo->chains = last_rxstats->chains;
2212 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2213 sinfo->chain_signal[i] =
2214 last_rxstats->chain_signal_last[i];
2215 sinfo->chain_signal_avg[i] =
2216 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2220 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
2221 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2223 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
2226 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
2227 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2228 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
2231 sinfo->filled |= BIT(NL80211_STA_INFO_TID_STATS);
2232 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
2233 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
2235 sta_set_tidstats(sta, tidstats, i);
2238 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2239 #ifdef CONFIG_MAC80211_MESH
2240 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
2241 BIT(NL80211_STA_INFO_PLID) |
2242 BIT(NL80211_STA_INFO_PLINK_STATE) |
2243 BIT(NL80211_STA_INFO_LOCAL_PM) |
2244 BIT(NL80211_STA_INFO_PEER_PM) |
2245 BIT(NL80211_STA_INFO_NONPEER_PM);
2247 sinfo->llid = sta->mesh->llid;
2248 sinfo->plid = sta->mesh->plid;
2249 sinfo->plink_state = sta->mesh->plink_state;
2250 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2251 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
2252 sinfo->t_offset = sta->mesh->t_offset;
2254 sinfo->local_pm = sta->mesh->local_pm;
2255 sinfo->peer_pm = sta->mesh->peer_pm;
2256 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2260 sinfo->bss_param.flags = 0;
2261 if (sdata->vif.bss_conf.use_cts_prot)
2262 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2263 if (sdata->vif.bss_conf.use_short_preamble)
2264 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2265 if (sdata->vif.bss_conf.use_short_slot)
2266 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2267 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2268 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2270 sinfo->sta_flags.set = 0;
2271 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2272 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2273 BIT(NL80211_STA_FLAG_WME) |
2274 BIT(NL80211_STA_FLAG_MFP) |
2275 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2276 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2277 BIT(NL80211_STA_FLAG_TDLS_PEER);
2278 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2279 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2280 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2281 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2283 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2284 if (test_sta_flag(sta, WLAN_STA_MFP))
2285 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2286 if (test_sta_flag(sta, WLAN_STA_AUTH))
2287 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2288 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2289 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2290 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2291 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2293 thr = sta_get_expected_throughput(sta);
2296 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2297 sinfo->expected_throughput = thr;
2301 u32 sta_get_expected_throughput(struct sta_info *sta)
2303 struct ieee80211_sub_if_data *sdata = sta->sdata;
2304 struct ieee80211_local *local = sdata->local;
2305 struct rate_control_ref *ref = NULL;
2308 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2309 ref = local->rate_ctrl;
2311 /* check if the driver has a SW RC implementation */
2312 if (ref && ref->ops->get_expected_throughput)
2313 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2315 thr = drv_get_expected_throughput(local, sta);
2320 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2322 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2324 if (time_after(stats->last_rx, sta->status_stats.last_ack))
2325 return stats->last_rx;
2326 return sta->status_stats.last_ack;
2329 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2331 if (!sta->sdata->local->ops->wake_tx_queue)
2334 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2335 sta->cparams.target = MS2TIME(50);
2336 sta->cparams.interval = MS2TIME(300);
2337 sta->cparams.ecn = false;
2339 sta->cparams.target = MS2TIME(20);
2340 sta->cparams.interval = MS2TIME(100);
2341 sta->cparams.ecn = true;
2345 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2348 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2350 sta_update_codel_params(sta, thr);