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
6 * Copyright (C) 2018-2021 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 = to_txq_info(sta->sta.txq[i]);
118 spin_lock_bh(&fq->lock);
119 ieee80211_txq_purge(local, txqi);
120 spin_unlock_bh(&fq->lock);
124 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
125 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
126 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
127 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
130 if (ieee80211_vif_is_mesh(&sdata->vif))
131 mesh_sta_cleanup(sta);
133 cancel_work_sync(&sta->drv_deliver_wk);
136 * Destroy aggregation state here. It would be nice to wait for the
137 * driver to finish aggregation stop and then clean up, but for now
138 * drivers have to handle aggregation stop being requested, followed
139 * directly by station destruction.
141 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
142 kfree(sta->ampdu_mlme.tid_start_tx[i]);
143 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
146 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
151 static void cleanup_single_sta(struct sta_info *sta)
153 struct ieee80211_sub_if_data *sdata = sta->sdata;
154 struct ieee80211_local *local = sdata->local;
156 __cleanup_single_sta(sta);
157 sta_info_free(local, sta);
160 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
163 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
166 /* protected by RCU */
167 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
170 struct ieee80211_local *local = sdata->local;
171 struct rhlist_head *tmp;
172 struct sta_info *sta;
175 for_each_sta_info(local, addr, sta, tmp) {
176 if (sta->sdata == sdata) {
178 /* this is safe as the caller must already hold
179 * another rcu read section or the mutex
189 * Get sta info either from the specified interface
190 * or from one of its vlans
192 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
195 struct ieee80211_local *local = sdata->local;
196 struct rhlist_head *tmp;
197 struct sta_info *sta;
200 for_each_sta_info(local, addr, sta, tmp) {
201 if (sta->sdata == sdata ||
202 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
204 /* this is safe as the caller must already hold
205 * another rcu read section or the mutex
214 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
217 struct ieee80211_local *local = sdata->local;
218 struct sta_info *sta;
221 list_for_each_entry_rcu(sta, &local->sta_list, list) {
222 if (sdata != sta->sdata)
235 * sta_info_free - free STA
237 * @local: pointer to the global information
238 * @sta: STA info to free
240 * This function must undo everything done by sta_info_alloc()
241 * that may happen before sta_info_insert(). It may only be
242 * called when sta_info_insert() has not been attempted (and
243 * if that fails, the station is freed anyway.)
245 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
248 * If we had used sta_info_pre_move_state() then we might not
249 * have gone through the state transitions down again, so do
250 * it here now (and warn if it's inserted).
252 * This will clear state such as fast TX/RX that may have been
253 * allocated during state transitions.
255 while (sta->sta_state > IEEE80211_STA_NONE) {
258 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
260 ret = sta_info_move_state(sta, sta->sta_state - 1);
261 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret))
266 rate_control_free_sta(sta);
268 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
271 kfree(to_txq_info(sta->sta.txq[0]));
272 kfree(rcu_dereference_raw(sta->sta.rates));
273 #ifdef CONFIG_MAC80211_MESH
276 free_percpu(sta->pcpu_rx_stats);
280 /* Caller must hold local->sta_mtx */
281 static int sta_info_hash_add(struct ieee80211_local *local,
282 struct sta_info *sta)
284 return rhltable_insert(&local->sta_hash, &sta->hash_node,
288 static void sta_deliver_ps_frames(struct work_struct *wk)
290 struct sta_info *sta;
292 sta = container_of(wk, struct sta_info, drv_deliver_wk);
298 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
299 ieee80211_sta_ps_deliver_wakeup(sta);
300 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
301 ieee80211_sta_ps_deliver_poll_response(sta);
302 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
303 ieee80211_sta_ps_deliver_uapsd(sta);
307 static int sta_prepare_rate_control(struct ieee80211_local *local,
308 struct sta_info *sta, gfp_t gfp)
310 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
313 sta->rate_ctrl = local->rate_ctrl;
314 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
316 if (!sta->rate_ctrl_priv)
322 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
323 const u8 *addr, gfp_t gfp)
325 struct ieee80211_local *local = sdata->local;
326 struct ieee80211_hw *hw = &local->hw;
327 struct sta_info *sta;
330 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
334 if (ieee80211_hw_check(hw, USES_RSS)) {
336 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
337 if (!sta->pcpu_rx_stats)
341 spin_lock_init(&sta->lock);
342 spin_lock_init(&sta->ps_lock);
343 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
344 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
345 mutex_init(&sta->ampdu_mlme.mtx);
346 #ifdef CONFIG_MAC80211_MESH
347 if (ieee80211_vif_is_mesh(&sdata->vif)) {
348 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
351 sta->mesh->plink_sta = sta;
352 spin_lock_init(&sta->mesh->plink_lock);
353 if (ieee80211_vif_is_mesh(&sdata->vif) &&
354 !sdata->u.mesh.user_mpm)
355 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
357 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
361 memcpy(sta->addr, addr, ETH_ALEN);
362 memcpy(sta->sta.addr, addr, ETH_ALEN);
363 sta->sta.max_rx_aggregation_subframes =
364 local->hw.max_rx_aggregation_subframes;
368 sta->rx_stats.last_rx = jiffies;
370 u64_stats_init(&sta->rx_stats.syncp);
372 ieee80211_init_frag_cache(&sta->frags);
374 sta->sta_state = IEEE80211_STA_NONE;
376 /* Mark TID as unreserved */
377 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
379 sta->last_connected = ktime_get_seconds();
380 ewma_signal_init(&sta->rx_stats_avg.signal);
381 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
382 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
383 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
385 if (local->ops->wake_tx_queue) {
387 int size = sizeof(struct txq_info) +
388 ALIGN(hw->txq_data_size, sizeof(void *));
390 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
394 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
395 struct txq_info *txq = txq_data + i * size;
397 ieee80211_txq_init(sdata, sta, txq, i);
401 if (sta_prepare_rate_control(local, sta, gfp))
404 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
405 skb_queue_head_init(&sta->ps_tx_buf[i]);
406 skb_queue_head_init(&sta->tx_filtered[i]);
409 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
410 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
412 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
413 if (sdata->vif.type == NL80211_IFTYPE_AP ||
414 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
415 struct ieee80211_supported_band *sband;
418 sband = ieee80211_get_sband(sdata);
422 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
423 IEEE80211_HT_CAP_SM_PS_SHIFT;
425 * Assume that hostapd advertises our caps in the beacon and
426 * this is the known_smps_mode for a station that just assciated
429 case WLAN_HT_SMPS_CONTROL_DISABLED:
430 sta->known_smps_mode = IEEE80211_SMPS_OFF;
432 case WLAN_HT_SMPS_CONTROL_STATIC:
433 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
435 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
436 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
443 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
445 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
446 sta->cparams.target = MS2TIME(20);
447 sta->cparams.interval = MS2TIME(100);
448 sta->cparams.ecn = true;
450 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
456 kfree(to_txq_info(sta->sta.txq[0]));
458 free_percpu(sta->pcpu_rx_stats);
459 #ifdef CONFIG_MAC80211_MESH
466 static int sta_info_insert_check(struct sta_info *sta)
468 struct ieee80211_sub_if_data *sdata = sta->sdata;
471 * Can't be a WARN_ON because it can be triggered through a race:
472 * something inserts a STA (on one CPU) without holding the RTNL
473 * and another CPU turns off the net device.
475 if (unlikely(!ieee80211_sdata_running(sdata)))
478 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
479 is_multicast_ether_addr(sta->sta.addr)))
482 /* The RCU read lock is required by rhashtable due to
483 * asynchronous resize/rehash. We also require the mutex
487 lockdep_assert_held(&sdata->local->sta_mtx);
488 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
489 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
498 static int sta_info_insert_drv_state(struct ieee80211_local *local,
499 struct ieee80211_sub_if_data *sdata,
500 struct sta_info *sta)
502 enum ieee80211_sta_state state;
505 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
506 err = drv_sta_state(local, sdata, sta, state, state + 1);
513 * Drivers using legacy sta_add/sta_remove callbacks only
514 * get uploaded set to true after sta_add is called.
516 if (!local->ops->sta_add)
517 sta->uploaded = true;
521 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
523 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
524 sta->sta.addr, state + 1, err);
528 /* unwind on error */
529 for (; state > IEEE80211_STA_NOTEXIST; state--)
530 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
536 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
538 struct ieee80211_local *local = sdata->local;
539 bool allow_p2p_go_ps = sdata->vif.p2p;
540 struct sta_info *sta;
543 list_for_each_entry_rcu(sta, &local->sta_list, list) {
544 if (sdata != sta->sdata ||
545 !test_sta_flag(sta, WLAN_STA_ASSOC))
547 if (!sta->sta.support_p2p_ps) {
548 allow_p2p_go_ps = false;
554 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
555 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
556 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
561 * should be called with sta_mtx locked
562 * this function replaces the mutex lock
565 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
567 struct ieee80211_local *local = sta->local;
568 struct ieee80211_sub_if_data *sdata = sta->sdata;
569 struct station_info *sinfo = NULL;
572 lockdep_assert_held(&local->sta_mtx);
574 /* check if STA exists already */
575 if (sta_info_get_bss(sdata, sta->sta.addr)) {
580 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
587 local->sta_generation++;
590 /* simplify things and don't accept BA sessions yet */
591 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
593 /* make the station visible */
594 err = sta_info_hash_add(local, sta);
598 list_add_tail_rcu(&sta->list, &local->sta_list);
601 err = sta_info_insert_drv_state(local, sdata, sta);
605 set_sta_flag(sta, WLAN_STA_INSERTED);
607 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
608 ieee80211_recalc_min_chandef(sta->sdata);
609 if (!sta->sta.support_p2p_ps)
610 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
613 /* accept BA sessions now */
614 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
616 ieee80211_sta_debugfs_add(sta);
617 rate_control_add_sta_debugfs(sta);
619 sinfo->generation = local->sta_generation;
620 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
623 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
625 /* move reference to rcu-protected */
627 mutex_unlock(&local->sta_mtx);
629 if (ieee80211_vif_is_mesh(&sdata->vif))
630 mesh_accept_plinks_update(sdata);
632 ieee80211_check_fast_xmit(sta);
636 sta_info_hash_del(local, sta);
637 list_del_rcu(&sta->list);
641 cleanup_single_sta(sta);
643 mutex_unlock(&local->sta_mtx);
649 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
651 struct ieee80211_local *local = sta->local;
656 mutex_lock(&local->sta_mtx);
658 err = sta_info_insert_check(sta);
660 sta_info_free(local, sta);
661 mutex_unlock(&local->sta_mtx);
666 return sta_info_insert_finish(sta);
669 int sta_info_insert(struct sta_info *sta)
671 int err = sta_info_insert_rcu(sta);
678 static inline void __bss_tim_set(u8 *tim, u16 id)
681 * This format has been mandated by the IEEE specifications,
682 * so this line may not be changed to use the __set_bit() format.
684 tim[id / 8] |= (1 << (id % 8));
687 static inline void __bss_tim_clear(u8 *tim, u16 id)
690 * This format has been mandated by the IEEE specifications,
691 * so this line may not be changed to use the __clear_bit() format.
693 tim[id / 8] &= ~(1 << (id % 8));
696 static inline bool __bss_tim_get(u8 *tim, u16 id)
699 * This format has been mandated by the IEEE specifications,
700 * so this line may not be changed to use the test_bit() format.
702 return tim[id / 8] & (1 << (id % 8));
705 static unsigned long ieee80211_tids_for_ac(int ac)
707 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
709 case IEEE80211_AC_VO:
710 return BIT(6) | BIT(7);
711 case IEEE80211_AC_VI:
712 return BIT(4) | BIT(5);
713 case IEEE80211_AC_BE:
714 return BIT(0) | BIT(3);
715 case IEEE80211_AC_BK:
716 return BIT(1) | BIT(2);
723 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
725 struct ieee80211_local *local = sta->local;
727 bool indicate_tim = false;
728 u8 ignore_for_tim = sta->sta.uapsd_queues;
730 u16 id = sta->sta.aid;
732 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
733 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
734 if (WARN_ON_ONCE(!sta->sdata->bss))
737 ps = &sta->sdata->bss->ps;
738 #ifdef CONFIG_MAC80211_MESH
739 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
740 ps = &sta->sdata->u.mesh.ps;
746 /* No need to do anything if the driver does all */
747 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
754 * If all ACs are delivery-enabled then we should build
755 * the TIM bit for all ACs anyway; if only some are then
756 * we ignore those and build the TIM bit using only the
759 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
763 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
765 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
768 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
771 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
772 !skb_queue_empty(&sta->ps_tx_buf[ac]);
776 tids = ieee80211_tids_for_ac(ac);
779 sta->driver_buffered_tids & tids;
781 sta->txq_buffered_tids & tids;
785 spin_lock_bh(&local->tim_lock);
787 if (indicate_tim == __bss_tim_get(ps->tim, id))
791 __bss_tim_set(ps->tim, id);
793 __bss_tim_clear(ps->tim, id);
795 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
796 local->tim_in_locked_section = true;
797 drv_set_tim(local, &sta->sta, indicate_tim);
798 local->tim_in_locked_section = false;
802 spin_unlock_bh(&local->tim_lock);
805 void sta_info_recalc_tim(struct sta_info *sta)
807 __sta_info_recalc_tim(sta, false);
810 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
812 struct ieee80211_tx_info *info;
818 info = IEEE80211_SKB_CB(skb);
820 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
821 timeout = (sta->listen_interval *
822 sta->sdata->vif.bss_conf.beacon_int *
824 if (timeout < STA_TX_BUFFER_EXPIRE)
825 timeout = STA_TX_BUFFER_EXPIRE;
826 return time_after(jiffies, info->control.jiffies + timeout);
830 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
831 struct sta_info *sta, int ac)
837 * First check for frames that should expire on the filtered
838 * queue. Frames here were rejected by the driver and are on
839 * a separate queue to avoid reordering with normal PS-buffered
840 * frames. They also aren't accounted for right now in the
841 * total_ps_buffered counter.
844 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
845 skb = skb_peek(&sta->tx_filtered[ac]);
846 if (sta_info_buffer_expired(sta, skb))
847 skb = __skb_dequeue(&sta->tx_filtered[ac]);
850 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
853 * Frames are queued in order, so if this one
854 * hasn't expired yet we can stop testing. If
855 * we actually reached the end of the queue we
856 * also need to stop, of course.
860 ieee80211_free_txskb(&local->hw, skb);
864 * Now also check the normal PS-buffered queue, this will
865 * only find something if the filtered queue was emptied
866 * since the filtered frames are all before the normal PS
870 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
871 skb = skb_peek(&sta->ps_tx_buf[ac]);
872 if (sta_info_buffer_expired(sta, skb))
873 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
876 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
879 * frames are queued in order, so if this one
880 * hasn't expired yet (or we reached the end of
881 * the queue) we can stop testing
886 local->total_ps_buffered--;
887 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
889 ieee80211_free_txskb(&local->hw, skb);
893 * Finally, recalculate the TIM bit for this station -- it might
894 * now be clear because the station was too slow to retrieve its
897 sta_info_recalc_tim(sta);
900 * Return whether there are any frames still buffered, this is
901 * used to check whether the cleanup timer still needs to run,
902 * if there are no frames we don't need to rearm the timer.
904 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
905 skb_queue_empty(&sta->tx_filtered[ac]));
908 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
909 struct sta_info *sta)
911 bool have_buffered = false;
914 /* This is only necessary for stations on BSS/MBSS interfaces */
915 if (!sta->sdata->bss &&
916 !ieee80211_vif_is_mesh(&sta->sdata->vif))
919 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
921 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
923 return have_buffered;
926 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
928 struct ieee80211_local *local;
929 struct ieee80211_sub_if_data *sdata;
940 lockdep_assert_held(&local->sta_mtx);
943 * Before removing the station from the driver and
944 * rate control, it might still start new aggregation
945 * sessions -- block that to make sure the tear-down
946 * will be sufficient.
948 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
949 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
952 * Before removing the station from the driver there might be pending
953 * rx frames on RSS queues sent prior to the disassociation - wait for
954 * all such frames to be processed.
956 drv_sync_rx_queues(local, sta);
958 ret = sta_info_hash_del(local, sta);
963 * for TDLS peers, make sure to return to the base channel before
966 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
967 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
968 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
971 list_del_rcu(&sta->list);
975 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
977 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
978 rcu_access_pointer(sdata->u.vlan.sta) == sta)
979 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
984 static void __sta_info_destroy_part2(struct sta_info *sta)
986 struct ieee80211_local *local = sta->local;
987 struct ieee80211_sub_if_data *sdata = sta->sdata;
988 struct station_info *sinfo;
992 * NOTE: This assumes at least synchronize_net() was done
993 * after _part1 and before _part2!
997 lockdep_assert_held(&local->sta_mtx);
999 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1000 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1004 /* now keys can no longer be reached */
1005 ieee80211_free_sta_keys(local, sta);
1007 /* disable TIM bit - last chance to tell driver */
1008 __sta_info_recalc_tim(sta, true);
1013 local->sta_generation++;
1015 while (sta->sta_state > IEEE80211_STA_NONE) {
1016 ret = sta_info_move_state(sta, sta->sta_state - 1);
1023 if (sta->uploaded) {
1024 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1025 IEEE80211_STA_NOTEXIST);
1026 WARN_ON_ONCE(ret != 0);
1029 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1031 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1033 sta_set_sinfo(sta, sinfo, true);
1034 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1037 rate_control_remove_sta_debugfs(sta);
1038 ieee80211_sta_debugfs_remove(sta);
1040 ieee80211_destroy_frag_cache(&sta->frags);
1042 cleanup_single_sta(sta);
1045 int __must_check __sta_info_destroy(struct sta_info *sta)
1047 int err = __sta_info_destroy_part1(sta);
1054 __sta_info_destroy_part2(sta);
1059 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1061 struct sta_info *sta;
1064 mutex_lock(&sdata->local->sta_mtx);
1065 sta = sta_info_get(sdata, addr);
1066 ret = __sta_info_destroy(sta);
1067 mutex_unlock(&sdata->local->sta_mtx);
1072 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1075 struct sta_info *sta;
1078 mutex_lock(&sdata->local->sta_mtx);
1079 sta = sta_info_get_bss(sdata, addr);
1080 ret = __sta_info_destroy(sta);
1081 mutex_unlock(&sdata->local->sta_mtx);
1086 static void sta_info_cleanup(struct timer_list *t)
1088 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1089 struct sta_info *sta;
1090 bool timer_needed = false;
1093 list_for_each_entry_rcu(sta, &local->sta_list, list)
1094 if (sta_info_cleanup_expire_buffered(local, sta))
1095 timer_needed = true;
1098 if (local->quiescing)
1104 mod_timer(&local->sta_cleanup,
1105 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1108 int sta_info_init(struct ieee80211_local *local)
1112 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1116 spin_lock_init(&local->tim_lock);
1117 mutex_init(&local->sta_mtx);
1118 INIT_LIST_HEAD(&local->sta_list);
1120 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1124 void sta_info_stop(struct ieee80211_local *local)
1126 del_timer_sync(&local->sta_cleanup);
1127 rhltable_destroy(&local->sta_hash);
1131 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1133 struct ieee80211_local *local = sdata->local;
1134 struct sta_info *sta, *tmp;
1135 LIST_HEAD(free_list);
1140 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1141 WARN_ON(vlans && !sdata->bss);
1143 mutex_lock(&local->sta_mtx);
1144 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1145 if (sdata == sta->sdata ||
1146 (vlans && sdata->bss == sta->sdata->bss)) {
1147 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1148 list_add(&sta->free_list, &free_list);
1153 if (!list_empty(&free_list)) {
1155 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1156 __sta_info_destroy_part2(sta);
1158 mutex_unlock(&local->sta_mtx);
1163 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1164 unsigned long exp_time)
1166 struct ieee80211_local *local = sdata->local;
1167 struct sta_info *sta, *tmp;
1169 mutex_lock(&local->sta_mtx);
1171 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1172 unsigned long last_active = ieee80211_sta_last_active(sta);
1174 if (sdata != sta->sdata)
1177 if (time_is_before_jiffies(last_active + exp_time)) {
1178 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1181 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1182 test_sta_flag(sta, WLAN_STA_PS_STA))
1183 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1185 WARN_ON(__sta_info_destroy(sta));
1189 mutex_unlock(&local->sta_mtx);
1192 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1194 const u8 *localaddr)
1196 struct ieee80211_local *local = hw_to_local(hw);
1197 struct rhlist_head *tmp;
1198 struct sta_info *sta;
1201 * Just return a random station if localaddr is NULL
1202 * ... first in list.
1204 for_each_sta_info(local, addr, sta, tmp) {
1206 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1215 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1217 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1220 struct sta_info *sta;
1225 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1234 EXPORT_SYMBOL(ieee80211_find_sta);
1236 /* powersave support code */
1237 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1239 struct ieee80211_sub_if_data *sdata = sta->sdata;
1240 struct ieee80211_local *local = sdata->local;
1241 struct sk_buff_head pending;
1242 int filtered = 0, buffered = 0, ac, i;
1243 unsigned long flags;
1246 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1247 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1250 if (sdata->vif.type == NL80211_IFTYPE_AP)
1251 ps = &sdata->bss->ps;
1252 else if (ieee80211_vif_is_mesh(&sdata->vif))
1253 ps = &sdata->u.mesh.ps;
1257 clear_sta_flag(sta, WLAN_STA_SP);
1259 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1260 sta->driver_buffered_tids = 0;
1261 sta->txq_buffered_tids = 0;
1263 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1264 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1266 if (sta->sta.txq[0]) {
1267 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1268 if (!txq_has_queue(sta->sta.txq[i]))
1271 drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
1275 skb_queue_head_init(&pending);
1277 /* sync with ieee80211_tx_h_unicast_ps_buf */
1278 spin_lock(&sta->ps_lock);
1279 /* Send all buffered frames to the station */
1280 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1281 int count = skb_queue_len(&pending), tmp;
1283 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1284 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1285 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1286 tmp = skb_queue_len(&pending);
1287 filtered += tmp - count;
1290 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1291 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1292 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1293 tmp = skb_queue_len(&pending);
1294 buffered += tmp - count;
1297 ieee80211_add_pending_skbs(local, &pending);
1299 /* now we're no longer in the deliver code */
1300 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1302 /* The station might have polled and then woken up before we responded,
1303 * so clear these flags now to avoid them sticking around.
1305 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1306 clear_sta_flag(sta, WLAN_STA_UAPSD);
1307 spin_unlock(&sta->ps_lock);
1309 atomic_dec(&ps->num_sta_ps);
1311 /* This station just woke up and isn't aware of our SMPS state */
1312 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1313 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1314 sdata->smps_mode) &&
1315 sta->known_smps_mode != sdata->bss->req_smps &&
1316 sta_info_tx_streams(sta) != 1) {
1318 "%pM just woke up and MIMO capable - update SMPS\n",
1320 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1322 sdata->vif.bss_conf.bssid);
1325 local->total_ps_buffered -= buffered;
1327 sta_info_recalc_tim(sta);
1330 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1331 sta->sta.addr, sta->sta.aid, filtered, buffered);
1333 ieee80211_check_fast_xmit(sta);
1336 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1337 enum ieee80211_frame_release_type reason,
1338 bool call_driver, bool more_data)
1340 struct ieee80211_sub_if_data *sdata = sta->sdata;
1341 struct ieee80211_local *local = sdata->local;
1342 struct ieee80211_qos_hdr *nullfunc;
1343 struct sk_buff *skb;
1344 int size = sizeof(*nullfunc);
1346 bool qos = sta->sta.wme;
1347 struct ieee80211_tx_info *info;
1348 struct ieee80211_chanctx_conf *chanctx_conf;
1351 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1352 IEEE80211_STYPE_QOS_NULLFUNC |
1353 IEEE80211_FCTL_FROMDS);
1356 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1357 IEEE80211_STYPE_NULLFUNC |
1358 IEEE80211_FCTL_FROMDS);
1361 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1365 skb_reserve(skb, local->hw.extra_tx_headroom);
1367 nullfunc = skb_put(skb, size);
1368 nullfunc->frame_control = fc;
1369 nullfunc->duration_id = 0;
1370 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1371 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1372 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1373 nullfunc->seq_ctrl = 0;
1375 skb->priority = tid;
1376 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1378 nullfunc->qos_ctrl = cpu_to_le16(tid);
1380 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1381 nullfunc->qos_ctrl |=
1382 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1384 nullfunc->frame_control |=
1385 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1389 info = IEEE80211_SKB_CB(skb);
1392 * Tell TX path to send this frame even though the
1393 * STA may still remain is PS mode after this frame
1394 * exchange. Also set EOSP to indicate this packet
1395 * ends the poll/service period.
1397 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1398 IEEE80211_TX_STATUS_EOSP |
1399 IEEE80211_TX_CTL_REQ_TX_STATUS;
1401 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1404 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1407 skb->dev = sdata->dev;
1410 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1411 if (WARN_ON(!chanctx_conf)) {
1417 info->band = chanctx_conf->def.chan->band;
1418 ieee80211_xmit(sdata, sta, skb, 0);
1422 static int find_highest_prio_tid(unsigned long tids)
1424 /* lower 3 TIDs aren't ordered perfectly */
1426 return fls(tids) - 1;
1427 /* TID 0 is BE just like TID 3 */
1430 return fls(tids) - 1;
1433 /* Indicates if the MORE_DATA bit should be set in the last
1434 * frame obtained by ieee80211_sta_ps_get_frames.
1435 * Note that driver_release_tids is relevant only if
1436 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1439 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1440 enum ieee80211_frame_release_type reason,
1441 unsigned long driver_release_tids)
1445 /* If the driver has data on more than one TID then
1446 * certainly there's more data if we release just a
1447 * single frame now (from a single TID). This will
1448 * only happen for PS-Poll.
1450 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1451 hweight16(driver_release_tids) > 1)
1454 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1455 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1458 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1459 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1467 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1468 enum ieee80211_frame_release_type reason,
1469 struct sk_buff_head *frames,
1470 unsigned long *driver_release_tids)
1472 struct ieee80211_sub_if_data *sdata = sta->sdata;
1473 struct ieee80211_local *local = sdata->local;
1476 /* Get response frame(s) and more data bit for the last one. */
1477 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1480 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1483 tids = ieee80211_tids_for_ac(ac);
1485 /* if we already have frames from software, then we can't also
1486 * release from hardware queues
1488 if (skb_queue_empty(frames)) {
1489 *driver_release_tids |=
1490 sta->driver_buffered_tids & tids;
1491 *driver_release_tids |= sta->txq_buffered_tids & tids;
1494 if (!*driver_release_tids) {
1495 struct sk_buff *skb;
1497 while (n_frames > 0) {
1498 skb = skb_dequeue(&sta->tx_filtered[ac]);
1501 &sta->ps_tx_buf[ac]);
1503 local->total_ps_buffered--;
1508 __skb_queue_tail(frames, skb);
1512 /* If we have more frames buffered on this AC, then abort the
1513 * loop since we can't send more data from other ACs before
1514 * the buffered frames from this.
1516 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1517 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1523 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1524 int n_frames, u8 ignored_acs,
1525 enum ieee80211_frame_release_type reason)
1527 struct ieee80211_sub_if_data *sdata = sta->sdata;
1528 struct ieee80211_local *local = sdata->local;
1529 unsigned long driver_release_tids = 0;
1530 struct sk_buff_head frames;
1533 /* Service or PS-Poll period starts */
1534 set_sta_flag(sta, WLAN_STA_SP);
1536 __skb_queue_head_init(&frames);
1538 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1539 &frames, &driver_release_tids);
1541 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1543 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1544 driver_release_tids =
1545 BIT(find_highest_prio_tid(driver_release_tids));
1547 if (skb_queue_empty(&frames) && !driver_release_tids) {
1551 * For PS-Poll, this can only happen due to a race condition
1552 * when we set the TIM bit and the station notices it, but
1553 * before it can poll for the frame we expire it.
1555 * For uAPSD, this is said in the standard (11.2.1.5 h):
1556 * At each unscheduled SP for a non-AP STA, the AP shall
1557 * attempt to transmit at least one MSDU or MMPDU, but no
1558 * more than the value specified in the Max SP Length field
1559 * in the QoS Capability element from delivery-enabled ACs,
1560 * that are destined for the non-AP STA.
1562 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1565 /* This will evaluate to 1, 3, 5 or 7. */
1566 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1567 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1571 ieee80211_send_null_response(sta, tid, reason, true, false);
1572 } else if (!driver_release_tids) {
1573 struct sk_buff_head pending;
1574 struct sk_buff *skb;
1577 bool need_null = false;
1579 skb_queue_head_init(&pending);
1581 while ((skb = __skb_dequeue(&frames))) {
1582 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1583 struct ieee80211_hdr *hdr = (void *) skb->data;
1589 * Tell TX path to send this frame even though the
1590 * STA may still remain is PS mode after this frame
1593 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1594 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1597 * Use MoreData flag to indicate whether there are
1598 * more buffered frames for this STA
1600 if (more_data || !skb_queue_empty(&frames))
1601 hdr->frame_control |=
1602 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1604 hdr->frame_control &=
1605 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1607 if (ieee80211_is_data_qos(hdr->frame_control) ||
1608 ieee80211_is_qos_nullfunc(hdr->frame_control))
1609 qoshdr = ieee80211_get_qos_ctl(hdr);
1611 tids |= BIT(skb->priority);
1613 __skb_queue_tail(&pending, skb);
1615 /* end service period after last frame or add one */
1616 if (!skb_queue_empty(&frames))
1619 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1620 /* for PS-Poll, there's only one frame */
1621 info->flags |= IEEE80211_TX_STATUS_EOSP |
1622 IEEE80211_TX_CTL_REQ_TX_STATUS;
1626 /* For uAPSD, things are a bit more complicated. If the
1627 * last frame has a QoS header (i.e. is a QoS-data or
1628 * QoS-nulldata frame) then just set the EOSP bit there
1630 * If the frame doesn't have a QoS header (which means
1631 * it should be a bufferable MMPDU) then we can't set
1632 * the EOSP bit in the QoS header; add a QoS-nulldata
1633 * frame to the list to send it after the MMPDU.
1635 * Note that this code is only in the mac80211-release
1636 * code path, we assume that the driver will not buffer
1637 * anything but QoS-data frames, or if it does, will
1638 * create the QoS-nulldata frame by itself if needed.
1640 * Cf. 802.11-2012 10.2.1.10 (c).
1643 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1645 info->flags |= IEEE80211_TX_STATUS_EOSP |
1646 IEEE80211_TX_CTL_REQ_TX_STATUS;
1648 /* The standard isn't completely clear on this
1649 * as it says the more-data bit should be set
1650 * if there are more BUs. The QoS-Null frame
1651 * we're about to send isn't buffered yet, we
1652 * only create it below, but let's pretend it
1653 * was buffered just in case some clients only
1654 * expect more-data=0 when eosp=1.
1656 hdr->frame_control |=
1657 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1664 drv_allow_buffered_frames(local, sta, tids, num,
1667 ieee80211_add_pending_skbs(local, &pending);
1670 ieee80211_send_null_response(
1671 sta, find_highest_prio_tid(tids),
1672 reason, false, false);
1674 sta_info_recalc_tim(sta);
1679 * We need to release a frame that is buffered somewhere in the
1680 * driver ... it'll have to handle that.
1681 * Note that the driver also has to check the number of frames
1682 * on the TIDs we're releasing from - if there are more than
1683 * n_frames it has to set the more-data bit (if we didn't ask
1684 * it to set it anyway due to other buffered frames); if there
1685 * are fewer than n_frames it has to make sure to adjust that
1686 * to allow the service period to end properly.
1688 drv_release_buffered_frames(local, sta, driver_release_tids,
1689 n_frames, reason, more_data);
1692 * Note that we don't recalculate the TIM bit here as it would
1693 * most likely have no effect at all unless the driver told us
1694 * that the TID(s) became empty before returning here from the
1696 * Either way, however, when the driver tells us that the TID(s)
1697 * became empty or we find that a txq became empty, we'll do the
1698 * TIM recalculation.
1701 if (!sta->sta.txq[0])
1704 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1705 if (!(driver_release_tids & BIT(tid)) ||
1706 txq_has_queue(sta->sta.txq[tid]))
1709 sta_info_recalc_tim(sta);
1715 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1717 u8 ignore_for_response = sta->sta.uapsd_queues;
1720 * If all ACs are delivery-enabled then we should reply
1721 * from any of them, if only some are enabled we reply
1722 * only from the non-enabled ones.
1724 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1725 ignore_for_response = 0;
1727 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1728 IEEE80211_FRAME_RELEASE_PSPOLL);
1731 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1733 int n_frames = sta->sta.max_sp;
1734 u8 delivery_enabled = sta->sta.uapsd_queues;
1737 * If we ever grow support for TSPEC this might happen if
1738 * the TSPEC update from hostapd comes in between a trigger
1739 * frame setting WLAN_STA_UAPSD in the RX path and this
1740 * actually getting called.
1742 if (!delivery_enabled)
1745 switch (sta->sta.max_sp) {
1756 /* XXX: what is a good value? */
1761 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1762 IEEE80211_FRAME_RELEASE_UAPSD);
1765 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1766 struct ieee80211_sta *pubsta, bool block)
1768 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1770 trace_api_sta_block_awake(sta->local, pubsta, block);
1773 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1774 ieee80211_clear_fast_xmit(sta);
1778 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1781 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1782 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1783 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1784 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1785 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1786 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1787 /* must be asleep in this case */
1788 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1789 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1791 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1792 ieee80211_check_fast_xmit(sta);
1795 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1797 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1799 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1800 struct ieee80211_local *local = sta->local;
1802 trace_api_eosp(local, pubsta);
1804 clear_sta_flag(sta, WLAN_STA_SP);
1806 EXPORT_SYMBOL(ieee80211_sta_eosp);
1808 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1810 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1811 enum ieee80211_frame_release_type reason;
1814 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1816 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1817 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1820 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1822 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1824 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1825 u8 tid, bool buffered)
1827 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1829 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1832 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1835 set_bit(tid, &sta->driver_buffered_tids);
1837 clear_bit(tid, &sta->driver_buffered_tids);
1839 sta_info_recalc_tim(sta);
1841 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1843 int sta_info_move_state(struct sta_info *sta,
1844 enum ieee80211_sta_state new_state)
1848 if (sta->sta_state == new_state)
1851 /* check allowed transitions first */
1853 switch (new_state) {
1854 case IEEE80211_STA_NONE:
1855 if (sta->sta_state != IEEE80211_STA_AUTH)
1858 case IEEE80211_STA_AUTH:
1859 if (sta->sta_state != IEEE80211_STA_NONE &&
1860 sta->sta_state != IEEE80211_STA_ASSOC)
1863 case IEEE80211_STA_ASSOC:
1864 if (sta->sta_state != IEEE80211_STA_AUTH &&
1865 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1868 case IEEE80211_STA_AUTHORIZED:
1869 if (sta->sta_state != IEEE80211_STA_ASSOC)
1873 WARN(1, "invalid state %d", new_state);
1877 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1878 sta->sta.addr, new_state);
1881 * notify the driver before the actual changes so it can
1882 * fail the transition
1884 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1885 int err = drv_sta_state(sta->local, sta->sdata, sta,
1886 sta->sta_state, new_state);
1891 /* reflect the change in all state variables */
1893 switch (new_state) {
1894 case IEEE80211_STA_NONE:
1895 if (sta->sta_state == IEEE80211_STA_AUTH)
1896 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1898 case IEEE80211_STA_AUTH:
1899 if (sta->sta_state == IEEE80211_STA_NONE) {
1900 set_bit(WLAN_STA_AUTH, &sta->_flags);
1901 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1902 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1903 ieee80211_recalc_min_chandef(sta->sdata);
1904 if (!sta->sta.support_p2p_ps)
1905 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1908 case IEEE80211_STA_ASSOC:
1909 if (sta->sta_state == IEEE80211_STA_AUTH) {
1910 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1911 ieee80211_recalc_min_chandef(sta->sdata);
1912 if (!sta->sta.support_p2p_ps)
1913 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1914 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1915 ieee80211_vif_dec_num_mcast(sta->sdata);
1916 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1917 ieee80211_clear_fast_xmit(sta);
1918 ieee80211_clear_fast_rx(sta);
1921 case IEEE80211_STA_AUTHORIZED:
1922 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1923 ieee80211_vif_inc_num_mcast(sta->sdata);
1924 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1925 ieee80211_check_fast_xmit(sta);
1926 ieee80211_check_fast_rx(sta);
1928 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1929 sta->sdata->vif.type == NL80211_IFTYPE_AP)
1930 cfg80211_send_layer2_update(sta->sdata->dev,
1937 sta->sta_state = new_state;
1942 u8 sta_info_tx_streams(struct sta_info *sta)
1944 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1947 if (!sta->sta.ht_cap.ht_supported)
1950 if (sta->sta.vht_cap.vht_supported) {
1953 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1955 for (i = 7; i >= 0; i--)
1956 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1957 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1961 if (ht_cap->mcs.rx_mask[3])
1963 else if (ht_cap->mcs.rx_mask[2])
1965 else if (ht_cap->mcs.rx_mask[1])
1970 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1973 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1974 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1977 static struct ieee80211_sta_rx_stats *
1978 sta_get_last_rx_stats(struct sta_info *sta)
1980 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
1981 struct ieee80211_local *local = sta->local;
1984 if (!ieee80211_hw_check(&local->hw, USES_RSS))
1987 for_each_possible_cpu(cpu) {
1988 struct ieee80211_sta_rx_stats *cpustats;
1990 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
1992 if (time_after(cpustats->last_rx, stats->last_rx))
1999 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2000 struct rate_info *rinfo)
2002 rinfo->bw = STA_STATS_GET(BW, rate);
2004 switch (STA_STATS_GET(TYPE, rate)) {
2005 case STA_STATS_RATE_TYPE_VHT:
2006 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2007 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2008 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2009 if (STA_STATS_GET(SGI, rate))
2010 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2012 case STA_STATS_RATE_TYPE_HT:
2013 rinfo->flags = RATE_INFO_FLAGS_MCS;
2014 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2015 if (STA_STATS_GET(SGI, rate))
2016 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2018 case STA_STATS_RATE_TYPE_LEGACY: {
2019 struct ieee80211_supported_band *sband;
2022 int band = STA_STATS_GET(LEGACY_BAND, rate);
2023 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2025 sband = local->hw.wiphy->bands[band];
2027 if (WARN_ON_ONCE(!sband->bitrates))
2030 brate = sband->bitrates[rate_idx].bitrate;
2031 if (rinfo->bw == RATE_INFO_BW_5)
2033 else if (rinfo->bw == RATE_INFO_BW_10)
2037 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2040 case STA_STATS_RATE_TYPE_HE:
2041 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2042 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2043 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2044 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2045 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2046 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2051 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2053 u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2055 if (rate == STA_STATS_RATE_INVALID)
2058 sta_stats_decode_rate(sta->local, rate, rinfo);
2062 static void sta_set_tidstats(struct sta_info *sta,
2063 struct cfg80211_tid_stats *tidstats,
2066 struct ieee80211_local *local = sta->local;
2068 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2072 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2073 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2074 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2076 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2079 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2080 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2081 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2084 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2085 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2086 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2087 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2090 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2091 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2092 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2093 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2096 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2097 spin_lock_bh(&local->fq.lock);
2100 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2101 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2102 to_txq_info(sta->sta.txq[tid]));
2105 spin_unlock_bh(&local->fq.lock);
2109 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2115 start = u64_stats_fetch_begin(&rxstats->syncp);
2116 value = rxstats->bytes;
2117 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2122 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2125 struct ieee80211_sub_if_data *sdata = sta->sdata;
2126 struct ieee80211_local *local = sdata->local;
2129 struct ieee80211_sta_rx_stats *last_rxstats;
2131 last_rxstats = sta_get_last_rx_stats(sta);
2133 sinfo->generation = sdata->local->sta_generation;
2135 /* do before driver, so beacon filtering drivers have a
2136 * chance to e.g. just add the number of filtered beacons
2137 * (or just modify the value entirely, of course)
2139 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2140 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2142 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2144 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2145 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2146 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2147 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2148 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2150 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2151 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2152 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2155 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2156 sinfo->inactive_time =
2157 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2159 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2160 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2161 sinfo->tx_bytes = 0;
2162 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2163 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2164 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2167 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2168 sinfo->tx_packets = 0;
2169 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2170 sinfo->tx_packets += sta->tx_stats.packets[ac];
2171 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2174 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2175 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2176 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2178 if (sta->pcpu_rx_stats) {
2179 for_each_possible_cpu(cpu) {
2180 struct ieee80211_sta_rx_stats *cpurxs;
2182 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2183 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2187 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2190 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2191 sinfo->rx_packets = sta->rx_stats.packets;
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_packets += cpurxs->packets;
2200 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2203 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2204 sinfo->tx_retries = sta->status_stats.retry_count;
2205 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2208 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2209 sinfo->tx_failed = sta->status_stats.retry_failed;
2210 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2213 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2214 if (sta->pcpu_rx_stats) {
2215 for_each_possible_cpu(cpu) {
2216 struct ieee80211_sta_rx_stats *cpurxs;
2218 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2219 sinfo->rx_dropped_misc += cpurxs->dropped;
2223 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2224 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2225 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2226 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2227 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2230 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2231 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2232 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2233 sinfo->signal = (s8)last_rxstats->last_signal;
2234 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2237 if (!sta->pcpu_rx_stats &&
2238 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2240 -ewma_signal_read(&sta->rx_stats_avg.signal);
2241 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2245 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2246 * the sta->rx_stats struct, so the check here is fine with and without
2249 if (last_rxstats->chains &&
2250 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2251 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2252 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2253 if (!sta->pcpu_rx_stats)
2254 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2256 sinfo->chains = last_rxstats->chains;
2258 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2259 sinfo->chain_signal[i] =
2260 last_rxstats->chain_signal_last[i];
2261 sinfo->chain_signal_avg[i] =
2262 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2266 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2267 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2269 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2272 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2273 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2274 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2277 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2278 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
2279 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
2281 sta_set_tidstats(sta, tidstats, i);
2285 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2286 #ifdef CONFIG_MAC80211_MESH
2287 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2288 BIT_ULL(NL80211_STA_INFO_PLID) |
2289 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2290 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2291 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2292 BIT_ULL(NL80211_STA_INFO_NONPEER_PM);
2294 sinfo->llid = sta->mesh->llid;
2295 sinfo->plid = sta->mesh->plid;
2296 sinfo->plink_state = sta->mesh->plink_state;
2297 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2298 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2299 sinfo->t_offset = sta->mesh->t_offset;
2301 sinfo->local_pm = sta->mesh->local_pm;
2302 sinfo->peer_pm = sta->mesh->peer_pm;
2303 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2307 sinfo->bss_param.flags = 0;
2308 if (sdata->vif.bss_conf.use_cts_prot)
2309 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2310 if (sdata->vif.bss_conf.use_short_preamble)
2311 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2312 if (sdata->vif.bss_conf.use_short_slot)
2313 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2314 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2315 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2317 sinfo->sta_flags.set = 0;
2318 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2319 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2320 BIT(NL80211_STA_FLAG_WME) |
2321 BIT(NL80211_STA_FLAG_MFP) |
2322 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2323 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2324 BIT(NL80211_STA_FLAG_TDLS_PEER);
2325 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2326 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2327 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2328 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2330 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2331 if (test_sta_flag(sta, WLAN_STA_MFP))
2332 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2333 if (test_sta_flag(sta, WLAN_STA_AUTH))
2334 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2335 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2336 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2337 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2338 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2340 thr = sta_get_expected_throughput(sta);
2343 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2344 sinfo->expected_throughput = thr;
2347 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2348 sta->status_stats.ack_signal_filled) {
2349 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2350 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2353 if (ieee80211_hw_check(&sta->local->hw, REPORTS_TX_ACK_STATUS) &&
2354 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_DATA_ACK_SIGNAL_AVG))) {
2355 sinfo->avg_ack_signal =
2356 -(s8)ewma_avg_signal_read(
2357 &sta->status_stats.avg_ack_signal);
2359 BIT_ULL(NL80211_STA_INFO_DATA_ACK_SIGNAL_AVG);
2363 u32 sta_get_expected_throughput(struct sta_info *sta)
2365 struct ieee80211_sub_if_data *sdata = sta->sdata;
2366 struct ieee80211_local *local = sdata->local;
2367 struct rate_control_ref *ref = NULL;
2370 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2371 ref = local->rate_ctrl;
2373 /* check if the driver has a SW RC implementation */
2374 if (ref && ref->ops->get_expected_throughput)
2375 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2377 thr = drv_get_expected_throughput(local, sta);
2382 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2384 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2386 if (!sta->status_stats.last_ack ||
2387 time_after(stats->last_rx, sta->status_stats.last_ack))
2388 return stats->last_rx;
2389 return sta->status_stats.last_ack;
2392 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2394 if (!sta->sdata->local->ops->wake_tx_queue)
2397 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2398 sta->cparams.target = MS2TIME(50);
2399 sta->cparams.interval = MS2TIME(300);
2400 sta->cparams.ecn = false;
2402 sta->cparams.target = MS2TIME(20);
2403 sta->cparams.interval = MS2TIME(100);
2404 sta->cparams.ecn = true;
2408 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2411 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2413 sta_update_codel_params(sta, thr);