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 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 rate_control_free_sta(sta);
250 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
253 kfree(to_txq_info(sta->sta.txq[0]));
254 kfree(rcu_dereference_raw(sta->sta.rates));
255 #ifdef CONFIG_MAC80211_MESH
258 free_percpu(sta->pcpu_rx_stats);
262 /* Caller must hold local->sta_mtx */
263 static int sta_info_hash_add(struct ieee80211_local *local,
264 struct sta_info *sta)
266 return rhltable_insert(&local->sta_hash, &sta->hash_node,
270 static void sta_deliver_ps_frames(struct work_struct *wk)
272 struct sta_info *sta;
274 sta = container_of(wk, struct sta_info, drv_deliver_wk);
280 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
281 ieee80211_sta_ps_deliver_wakeup(sta);
282 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
283 ieee80211_sta_ps_deliver_poll_response(sta);
284 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
285 ieee80211_sta_ps_deliver_uapsd(sta);
289 static int sta_prepare_rate_control(struct ieee80211_local *local,
290 struct sta_info *sta, gfp_t gfp)
292 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
295 sta->rate_ctrl = local->rate_ctrl;
296 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
298 if (!sta->rate_ctrl_priv)
304 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
305 const u8 *addr, gfp_t gfp)
307 struct ieee80211_local *local = sdata->local;
308 struct ieee80211_hw *hw = &local->hw;
309 struct sta_info *sta;
312 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
316 if (ieee80211_hw_check(hw, USES_RSS)) {
318 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
319 if (!sta->pcpu_rx_stats)
323 spin_lock_init(&sta->lock);
324 spin_lock_init(&sta->ps_lock);
325 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
326 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
327 mutex_init(&sta->ampdu_mlme.mtx);
328 #ifdef CONFIG_MAC80211_MESH
329 if (ieee80211_vif_is_mesh(&sdata->vif)) {
330 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
333 sta->mesh->plink_sta = sta;
334 spin_lock_init(&sta->mesh->plink_lock);
335 if (ieee80211_vif_is_mesh(&sdata->vif) &&
336 !sdata->u.mesh.user_mpm)
337 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
339 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
343 memcpy(sta->addr, addr, ETH_ALEN);
344 memcpy(sta->sta.addr, addr, ETH_ALEN);
345 sta->sta.max_rx_aggregation_subframes =
346 local->hw.max_rx_aggregation_subframes;
350 sta->rx_stats.last_rx = jiffies;
352 u64_stats_init(&sta->rx_stats.syncp);
354 sta->sta_state = IEEE80211_STA_NONE;
356 /* Mark TID as unreserved */
357 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
359 sta->last_connected = ktime_get_seconds();
360 ewma_signal_init(&sta->rx_stats_avg.signal);
361 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
362 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
363 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
365 if (local->ops->wake_tx_queue) {
367 int size = sizeof(struct txq_info) +
368 ALIGN(hw->txq_data_size, sizeof(void *));
370 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
374 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
375 struct txq_info *txq = txq_data + i * size;
377 ieee80211_txq_init(sdata, sta, txq, i);
381 if (sta_prepare_rate_control(local, sta, gfp))
384 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
385 skb_queue_head_init(&sta->ps_tx_buf[i]);
386 skb_queue_head_init(&sta->tx_filtered[i]);
389 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
390 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
392 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
393 if (sdata->vif.type == NL80211_IFTYPE_AP ||
394 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
395 struct ieee80211_supported_band *sband;
398 sband = ieee80211_get_sband(sdata);
402 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
403 IEEE80211_HT_CAP_SM_PS_SHIFT;
405 * Assume that hostapd advertises our caps in the beacon and
406 * this is the known_smps_mode for a station that just assciated
409 case WLAN_HT_SMPS_CONTROL_DISABLED:
410 sta->known_smps_mode = IEEE80211_SMPS_OFF;
412 case WLAN_HT_SMPS_CONTROL_STATIC:
413 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
415 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
416 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
423 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
425 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
426 sta->cparams.target = MS2TIME(20);
427 sta->cparams.interval = MS2TIME(100);
428 sta->cparams.ecn = true;
430 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
436 kfree(to_txq_info(sta->sta.txq[0]));
438 free_percpu(sta->pcpu_rx_stats);
439 #ifdef CONFIG_MAC80211_MESH
446 static int sta_info_insert_check(struct sta_info *sta)
448 struct ieee80211_sub_if_data *sdata = sta->sdata;
451 * Can't be a WARN_ON because it can be triggered through a race:
452 * something inserts a STA (on one CPU) without holding the RTNL
453 * and another CPU turns off the net device.
455 if (unlikely(!ieee80211_sdata_running(sdata)))
458 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
459 is_multicast_ether_addr(sta->sta.addr)))
462 /* The RCU read lock is required by rhashtable due to
463 * asynchronous resize/rehash. We also require the mutex
467 lockdep_assert_held(&sdata->local->sta_mtx);
468 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
469 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
478 static int sta_info_insert_drv_state(struct ieee80211_local *local,
479 struct ieee80211_sub_if_data *sdata,
480 struct sta_info *sta)
482 enum ieee80211_sta_state state;
485 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
486 err = drv_sta_state(local, sdata, sta, state, state + 1);
493 * Drivers using legacy sta_add/sta_remove callbacks only
494 * get uploaded set to true after sta_add is called.
496 if (!local->ops->sta_add)
497 sta->uploaded = true;
501 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
503 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
504 sta->sta.addr, state + 1, err);
508 /* unwind on error */
509 for (; state > IEEE80211_STA_NOTEXIST; state--)
510 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
516 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
518 struct ieee80211_local *local = sdata->local;
519 bool allow_p2p_go_ps = sdata->vif.p2p;
520 struct sta_info *sta;
523 list_for_each_entry_rcu(sta, &local->sta_list, list) {
524 if (sdata != sta->sdata ||
525 !test_sta_flag(sta, WLAN_STA_ASSOC))
527 if (!sta->sta.support_p2p_ps) {
528 allow_p2p_go_ps = false;
534 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
535 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
536 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
541 * should be called with sta_mtx locked
542 * this function replaces the mutex lock
545 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
547 struct ieee80211_local *local = sta->local;
548 struct ieee80211_sub_if_data *sdata = sta->sdata;
549 struct station_info *sinfo = NULL;
552 lockdep_assert_held(&local->sta_mtx);
554 /* check if STA exists already */
555 if (sta_info_get_bss(sdata, sta->sta.addr)) {
560 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
567 local->sta_generation++;
570 /* simplify things and don't accept BA sessions yet */
571 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
573 /* make the station visible */
574 err = sta_info_hash_add(local, sta);
578 list_add_tail_rcu(&sta->list, &local->sta_list);
581 err = sta_info_insert_drv_state(local, sdata, sta);
585 set_sta_flag(sta, WLAN_STA_INSERTED);
587 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
588 ieee80211_recalc_min_chandef(sta->sdata);
589 if (!sta->sta.support_p2p_ps)
590 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
593 /* accept BA sessions now */
594 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
596 ieee80211_sta_debugfs_add(sta);
597 rate_control_add_sta_debugfs(sta);
599 sinfo->generation = local->sta_generation;
600 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
603 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
605 /* move reference to rcu-protected */
607 mutex_unlock(&local->sta_mtx);
609 if (ieee80211_vif_is_mesh(&sdata->vif))
610 mesh_accept_plinks_update(sdata);
614 sta_info_hash_del(local, sta);
615 list_del_rcu(&sta->list);
619 __cleanup_single_sta(sta);
621 mutex_unlock(&local->sta_mtx);
627 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
629 struct ieee80211_local *local = sta->local;
634 mutex_lock(&local->sta_mtx);
636 err = sta_info_insert_check(sta);
638 mutex_unlock(&local->sta_mtx);
643 err = sta_info_insert_finish(sta);
649 sta_info_free(local, sta);
653 int sta_info_insert(struct sta_info *sta)
655 int err = sta_info_insert_rcu(sta);
662 static inline void __bss_tim_set(u8 *tim, u16 id)
665 * This format has been mandated by the IEEE specifications,
666 * so this line may not be changed to use the __set_bit() format.
668 tim[id / 8] |= (1 << (id % 8));
671 static inline void __bss_tim_clear(u8 *tim, u16 id)
674 * This format has been mandated by the IEEE specifications,
675 * so this line may not be changed to use the __clear_bit() format.
677 tim[id / 8] &= ~(1 << (id % 8));
680 static inline bool __bss_tim_get(u8 *tim, u16 id)
683 * This format has been mandated by the IEEE specifications,
684 * so this line may not be changed to use the test_bit() format.
686 return tim[id / 8] & (1 << (id % 8));
689 static unsigned long ieee80211_tids_for_ac(int ac)
691 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
693 case IEEE80211_AC_VO:
694 return BIT(6) | BIT(7);
695 case IEEE80211_AC_VI:
696 return BIT(4) | BIT(5);
697 case IEEE80211_AC_BE:
698 return BIT(0) | BIT(3);
699 case IEEE80211_AC_BK:
700 return BIT(1) | BIT(2);
707 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
709 struct ieee80211_local *local = sta->local;
711 bool indicate_tim = false;
712 u8 ignore_for_tim = sta->sta.uapsd_queues;
714 u16 id = sta->sta.aid;
716 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
717 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
718 if (WARN_ON_ONCE(!sta->sdata->bss))
721 ps = &sta->sdata->bss->ps;
722 #ifdef CONFIG_MAC80211_MESH
723 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
724 ps = &sta->sdata->u.mesh.ps;
730 /* No need to do anything if the driver does all */
731 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
738 * If all ACs are delivery-enabled then we should build
739 * the TIM bit for all ACs anyway; if only some are then
740 * we ignore those and build the TIM bit using only the
743 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
747 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
749 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
752 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
755 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
756 !skb_queue_empty(&sta->ps_tx_buf[ac]);
760 tids = ieee80211_tids_for_ac(ac);
763 sta->driver_buffered_tids & tids;
765 sta->txq_buffered_tids & tids;
769 spin_lock_bh(&local->tim_lock);
771 if (indicate_tim == __bss_tim_get(ps->tim, id))
775 __bss_tim_set(ps->tim, id);
777 __bss_tim_clear(ps->tim, id);
779 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
780 local->tim_in_locked_section = true;
781 drv_set_tim(local, &sta->sta, indicate_tim);
782 local->tim_in_locked_section = false;
786 spin_unlock_bh(&local->tim_lock);
789 void sta_info_recalc_tim(struct sta_info *sta)
791 __sta_info_recalc_tim(sta, false);
794 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
796 struct ieee80211_tx_info *info;
802 info = IEEE80211_SKB_CB(skb);
804 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
805 timeout = (sta->listen_interval *
806 sta->sdata->vif.bss_conf.beacon_int *
808 if (timeout < STA_TX_BUFFER_EXPIRE)
809 timeout = STA_TX_BUFFER_EXPIRE;
810 return time_after(jiffies, info->control.jiffies + timeout);
814 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
815 struct sta_info *sta, int ac)
821 * First check for frames that should expire on the filtered
822 * queue. Frames here were rejected by the driver and are on
823 * a separate queue to avoid reordering with normal PS-buffered
824 * frames. They also aren't accounted for right now in the
825 * total_ps_buffered counter.
828 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
829 skb = skb_peek(&sta->tx_filtered[ac]);
830 if (sta_info_buffer_expired(sta, skb))
831 skb = __skb_dequeue(&sta->tx_filtered[ac]);
834 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
837 * Frames are queued in order, so if this one
838 * hasn't expired yet we can stop testing. If
839 * we actually reached the end of the queue we
840 * also need to stop, of course.
844 ieee80211_free_txskb(&local->hw, skb);
848 * Now also check the normal PS-buffered queue, this will
849 * only find something if the filtered queue was emptied
850 * since the filtered frames are all before the normal PS
854 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
855 skb = skb_peek(&sta->ps_tx_buf[ac]);
856 if (sta_info_buffer_expired(sta, skb))
857 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
860 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
863 * frames are queued in order, so if this one
864 * hasn't expired yet (or we reached the end of
865 * the queue) we can stop testing
870 local->total_ps_buffered--;
871 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
873 ieee80211_free_txskb(&local->hw, skb);
877 * Finally, recalculate the TIM bit for this station -- it might
878 * now be clear because the station was too slow to retrieve its
881 sta_info_recalc_tim(sta);
884 * Return whether there are any frames still buffered, this is
885 * used to check whether the cleanup timer still needs to run,
886 * if there are no frames we don't need to rearm the timer.
888 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
889 skb_queue_empty(&sta->tx_filtered[ac]));
892 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
893 struct sta_info *sta)
895 bool have_buffered = false;
898 /* This is only necessary for stations on BSS/MBSS interfaces */
899 if (!sta->sdata->bss &&
900 !ieee80211_vif_is_mesh(&sta->sdata->vif))
903 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
905 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
907 return have_buffered;
910 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
912 struct ieee80211_local *local;
913 struct ieee80211_sub_if_data *sdata;
924 lockdep_assert_held(&local->sta_mtx);
927 * Before removing the station from the driver and
928 * rate control, it might still start new aggregation
929 * sessions -- block that to make sure the tear-down
930 * will be sufficient.
932 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
933 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
936 * Before removing the station from the driver there might be pending
937 * rx frames on RSS queues sent prior to the disassociation - wait for
938 * all such frames to be processed.
940 drv_sync_rx_queues(local, sta);
942 ret = sta_info_hash_del(local, sta);
947 * for TDLS peers, make sure to return to the base channel before
950 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
951 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
952 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
955 list_del_rcu(&sta->list);
958 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
960 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
961 rcu_access_pointer(sdata->u.vlan.sta) == sta)
962 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
967 static void __sta_info_destroy_part2(struct sta_info *sta)
969 struct ieee80211_local *local = sta->local;
970 struct ieee80211_sub_if_data *sdata = sta->sdata;
971 struct station_info *sinfo;
975 * NOTE: This assumes at least synchronize_net() was done
976 * after _part1 and before _part2!
980 lockdep_assert_held(&local->sta_mtx);
982 /* now keys can no longer be reached */
983 ieee80211_free_sta_keys(local, sta);
985 /* disable TIM bit - last chance to tell driver */
986 __sta_info_recalc_tim(sta, true);
991 local->sta_generation++;
993 while (sta->sta_state > IEEE80211_STA_NONE) {
994 ret = sta_info_move_state(sta, sta->sta_state - 1);
1001 if (sta->uploaded) {
1002 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1003 IEEE80211_STA_NOTEXIST);
1004 WARN_ON_ONCE(ret != 0);
1007 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1009 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1011 sta_set_sinfo(sta, sinfo, true);
1012 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1015 rate_control_remove_sta_debugfs(sta);
1016 ieee80211_sta_debugfs_remove(sta);
1018 cleanup_single_sta(sta);
1021 int __must_check __sta_info_destroy(struct sta_info *sta)
1023 int err = __sta_info_destroy_part1(sta);
1030 __sta_info_destroy_part2(sta);
1035 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1037 struct sta_info *sta;
1040 mutex_lock(&sdata->local->sta_mtx);
1041 sta = sta_info_get(sdata, addr);
1042 ret = __sta_info_destroy(sta);
1043 mutex_unlock(&sdata->local->sta_mtx);
1048 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1051 struct sta_info *sta;
1054 mutex_lock(&sdata->local->sta_mtx);
1055 sta = sta_info_get_bss(sdata, addr);
1056 ret = __sta_info_destroy(sta);
1057 mutex_unlock(&sdata->local->sta_mtx);
1062 static void sta_info_cleanup(struct timer_list *t)
1064 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1065 struct sta_info *sta;
1066 bool timer_needed = false;
1069 list_for_each_entry_rcu(sta, &local->sta_list, list)
1070 if (sta_info_cleanup_expire_buffered(local, sta))
1071 timer_needed = true;
1074 if (local->quiescing)
1080 mod_timer(&local->sta_cleanup,
1081 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1084 int sta_info_init(struct ieee80211_local *local)
1088 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1092 spin_lock_init(&local->tim_lock);
1093 mutex_init(&local->sta_mtx);
1094 INIT_LIST_HEAD(&local->sta_list);
1096 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1100 void sta_info_stop(struct ieee80211_local *local)
1102 del_timer_sync(&local->sta_cleanup);
1103 rhltable_destroy(&local->sta_hash);
1107 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1109 struct ieee80211_local *local = sdata->local;
1110 struct sta_info *sta, *tmp;
1111 LIST_HEAD(free_list);
1116 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1117 WARN_ON(vlans && !sdata->bss);
1119 mutex_lock(&local->sta_mtx);
1120 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1121 if (sdata == sta->sdata ||
1122 (vlans && sdata->bss == sta->sdata->bss)) {
1123 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1124 list_add(&sta->free_list, &free_list);
1129 if (!list_empty(&free_list)) {
1131 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1132 __sta_info_destroy_part2(sta);
1134 mutex_unlock(&local->sta_mtx);
1139 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1140 unsigned long exp_time)
1142 struct ieee80211_local *local = sdata->local;
1143 struct sta_info *sta, *tmp;
1145 mutex_lock(&local->sta_mtx);
1147 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1148 unsigned long last_active = ieee80211_sta_last_active(sta);
1150 if (sdata != sta->sdata)
1153 if (time_is_before_jiffies(last_active + exp_time)) {
1154 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1157 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1158 test_sta_flag(sta, WLAN_STA_PS_STA))
1159 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1161 WARN_ON(__sta_info_destroy(sta));
1165 mutex_unlock(&local->sta_mtx);
1168 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1170 const u8 *localaddr)
1172 struct ieee80211_local *local = hw_to_local(hw);
1173 struct rhlist_head *tmp;
1174 struct sta_info *sta;
1177 * Just return a random station if localaddr is NULL
1178 * ... first in list.
1180 for_each_sta_info(local, addr, sta, tmp) {
1182 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1191 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1193 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1196 struct sta_info *sta;
1201 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1210 EXPORT_SYMBOL(ieee80211_find_sta);
1212 /* powersave support code */
1213 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1215 struct ieee80211_sub_if_data *sdata = sta->sdata;
1216 struct ieee80211_local *local = sdata->local;
1217 struct sk_buff_head pending;
1218 int filtered = 0, buffered = 0, ac, i;
1219 unsigned long flags;
1222 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1223 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1226 if (sdata->vif.type == NL80211_IFTYPE_AP)
1227 ps = &sdata->bss->ps;
1228 else if (ieee80211_vif_is_mesh(&sdata->vif))
1229 ps = &sdata->u.mesh.ps;
1233 clear_sta_flag(sta, WLAN_STA_SP);
1235 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1236 sta->driver_buffered_tids = 0;
1237 sta->txq_buffered_tids = 0;
1239 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1240 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1242 if (sta->sta.txq[0]) {
1243 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1244 if (!txq_has_queue(sta->sta.txq[i]))
1247 drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
1251 skb_queue_head_init(&pending);
1253 /* sync with ieee80211_tx_h_unicast_ps_buf */
1254 spin_lock(&sta->ps_lock);
1255 /* Send all buffered frames to the station */
1256 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1257 int count = skb_queue_len(&pending), tmp;
1259 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1260 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1261 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1262 tmp = skb_queue_len(&pending);
1263 filtered += tmp - count;
1266 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1267 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1268 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1269 tmp = skb_queue_len(&pending);
1270 buffered += tmp - count;
1273 ieee80211_add_pending_skbs(local, &pending);
1275 /* now we're no longer in the deliver code */
1276 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1278 /* The station might have polled and then woken up before we responded,
1279 * so clear these flags now to avoid them sticking around.
1281 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1282 clear_sta_flag(sta, WLAN_STA_UAPSD);
1283 spin_unlock(&sta->ps_lock);
1285 atomic_dec(&ps->num_sta_ps);
1287 /* This station just woke up and isn't aware of our SMPS state */
1288 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1289 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1290 sdata->smps_mode) &&
1291 sta->known_smps_mode != sdata->bss->req_smps &&
1292 sta_info_tx_streams(sta) != 1) {
1294 "%pM just woke up and MIMO capable - update SMPS\n",
1296 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1298 sdata->vif.bss_conf.bssid);
1301 local->total_ps_buffered -= buffered;
1303 sta_info_recalc_tim(sta);
1306 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1307 sta->sta.addr, sta->sta.aid, filtered, buffered);
1309 ieee80211_check_fast_xmit(sta);
1312 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1313 enum ieee80211_frame_release_type reason,
1314 bool call_driver, bool more_data)
1316 struct ieee80211_sub_if_data *sdata = sta->sdata;
1317 struct ieee80211_local *local = sdata->local;
1318 struct ieee80211_qos_hdr *nullfunc;
1319 struct sk_buff *skb;
1320 int size = sizeof(*nullfunc);
1322 bool qos = sta->sta.wme;
1323 struct ieee80211_tx_info *info;
1324 struct ieee80211_chanctx_conf *chanctx_conf;
1327 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1328 IEEE80211_STYPE_QOS_NULLFUNC |
1329 IEEE80211_FCTL_FROMDS);
1332 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1333 IEEE80211_STYPE_NULLFUNC |
1334 IEEE80211_FCTL_FROMDS);
1337 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1341 skb_reserve(skb, local->hw.extra_tx_headroom);
1343 nullfunc = skb_put(skb, size);
1344 nullfunc->frame_control = fc;
1345 nullfunc->duration_id = 0;
1346 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1347 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1348 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1349 nullfunc->seq_ctrl = 0;
1351 skb->priority = tid;
1352 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1354 nullfunc->qos_ctrl = cpu_to_le16(tid);
1356 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1357 nullfunc->qos_ctrl |=
1358 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1360 nullfunc->frame_control |=
1361 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1365 info = IEEE80211_SKB_CB(skb);
1368 * Tell TX path to send this frame even though the
1369 * STA may still remain is PS mode after this frame
1370 * exchange. Also set EOSP to indicate this packet
1371 * ends the poll/service period.
1373 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1374 IEEE80211_TX_STATUS_EOSP |
1375 IEEE80211_TX_CTL_REQ_TX_STATUS;
1377 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1380 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1383 skb->dev = sdata->dev;
1386 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1387 if (WARN_ON(!chanctx_conf)) {
1393 info->band = chanctx_conf->def.chan->band;
1394 ieee80211_xmit(sdata, sta, skb, 0);
1398 static int find_highest_prio_tid(unsigned long tids)
1400 /* lower 3 TIDs aren't ordered perfectly */
1402 return fls(tids) - 1;
1403 /* TID 0 is BE just like TID 3 */
1406 return fls(tids) - 1;
1409 /* Indicates if the MORE_DATA bit should be set in the last
1410 * frame obtained by ieee80211_sta_ps_get_frames.
1411 * Note that driver_release_tids is relevant only if
1412 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1415 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1416 enum ieee80211_frame_release_type reason,
1417 unsigned long driver_release_tids)
1421 /* If the driver has data on more than one TID then
1422 * certainly there's more data if we release just a
1423 * single frame now (from a single TID). This will
1424 * only happen for PS-Poll.
1426 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1427 hweight16(driver_release_tids) > 1)
1430 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1431 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1434 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1435 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1443 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1444 enum ieee80211_frame_release_type reason,
1445 struct sk_buff_head *frames,
1446 unsigned long *driver_release_tids)
1448 struct ieee80211_sub_if_data *sdata = sta->sdata;
1449 struct ieee80211_local *local = sdata->local;
1452 /* Get response frame(s) and more data bit for the last one. */
1453 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1456 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1459 tids = ieee80211_tids_for_ac(ac);
1461 /* if we already have frames from software, then we can't also
1462 * release from hardware queues
1464 if (skb_queue_empty(frames)) {
1465 *driver_release_tids |=
1466 sta->driver_buffered_tids & tids;
1467 *driver_release_tids |= sta->txq_buffered_tids & tids;
1470 if (!*driver_release_tids) {
1471 struct sk_buff *skb;
1473 while (n_frames > 0) {
1474 skb = skb_dequeue(&sta->tx_filtered[ac]);
1477 &sta->ps_tx_buf[ac]);
1479 local->total_ps_buffered--;
1484 __skb_queue_tail(frames, skb);
1488 /* If we have more frames buffered on this AC, then abort the
1489 * loop since we can't send more data from other ACs before
1490 * the buffered frames from this.
1492 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1493 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1499 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1500 int n_frames, u8 ignored_acs,
1501 enum ieee80211_frame_release_type reason)
1503 struct ieee80211_sub_if_data *sdata = sta->sdata;
1504 struct ieee80211_local *local = sdata->local;
1505 unsigned long driver_release_tids = 0;
1506 struct sk_buff_head frames;
1509 /* Service or PS-Poll period starts */
1510 set_sta_flag(sta, WLAN_STA_SP);
1512 __skb_queue_head_init(&frames);
1514 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1515 &frames, &driver_release_tids);
1517 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1519 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1520 driver_release_tids =
1521 BIT(find_highest_prio_tid(driver_release_tids));
1523 if (skb_queue_empty(&frames) && !driver_release_tids) {
1527 * For PS-Poll, this can only happen due to a race condition
1528 * when we set the TIM bit and the station notices it, but
1529 * before it can poll for the frame we expire it.
1531 * For uAPSD, this is said in the standard (11.2.1.5 h):
1532 * At each unscheduled SP for a non-AP STA, the AP shall
1533 * attempt to transmit at least one MSDU or MMPDU, but no
1534 * more than the value specified in the Max SP Length field
1535 * in the QoS Capability element from delivery-enabled ACs,
1536 * that are destined for the non-AP STA.
1538 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1541 /* This will evaluate to 1, 3, 5 or 7. */
1542 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1543 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1547 ieee80211_send_null_response(sta, tid, reason, true, false);
1548 } else if (!driver_release_tids) {
1549 struct sk_buff_head pending;
1550 struct sk_buff *skb;
1553 bool need_null = false;
1555 skb_queue_head_init(&pending);
1557 while ((skb = __skb_dequeue(&frames))) {
1558 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1559 struct ieee80211_hdr *hdr = (void *) skb->data;
1565 * Tell TX path to send this frame even though the
1566 * STA may still remain is PS mode after this frame
1569 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1570 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1573 * Use MoreData flag to indicate whether there are
1574 * more buffered frames for this STA
1576 if (more_data || !skb_queue_empty(&frames))
1577 hdr->frame_control |=
1578 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1580 hdr->frame_control &=
1581 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1583 if (ieee80211_is_data_qos(hdr->frame_control) ||
1584 ieee80211_is_qos_nullfunc(hdr->frame_control))
1585 qoshdr = ieee80211_get_qos_ctl(hdr);
1587 tids |= BIT(skb->priority);
1589 __skb_queue_tail(&pending, skb);
1591 /* end service period after last frame or add one */
1592 if (!skb_queue_empty(&frames))
1595 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1596 /* for PS-Poll, there's only one frame */
1597 info->flags |= IEEE80211_TX_STATUS_EOSP |
1598 IEEE80211_TX_CTL_REQ_TX_STATUS;
1602 /* For uAPSD, things are a bit more complicated. If the
1603 * last frame has a QoS header (i.e. is a QoS-data or
1604 * QoS-nulldata frame) then just set the EOSP bit there
1606 * If the frame doesn't have a QoS header (which means
1607 * it should be a bufferable MMPDU) then we can't set
1608 * the EOSP bit in the QoS header; add a QoS-nulldata
1609 * frame to the list to send it after the MMPDU.
1611 * Note that this code is only in the mac80211-release
1612 * code path, we assume that the driver will not buffer
1613 * anything but QoS-data frames, or if it does, will
1614 * create the QoS-nulldata frame by itself if needed.
1616 * Cf. 802.11-2012 10.2.1.10 (c).
1619 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1621 info->flags |= IEEE80211_TX_STATUS_EOSP |
1622 IEEE80211_TX_CTL_REQ_TX_STATUS;
1624 /* The standard isn't completely clear on this
1625 * as it says the more-data bit should be set
1626 * if there are more BUs. The QoS-Null frame
1627 * we're about to send isn't buffered yet, we
1628 * only create it below, but let's pretend it
1629 * was buffered just in case some clients only
1630 * expect more-data=0 when eosp=1.
1632 hdr->frame_control |=
1633 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1640 drv_allow_buffered_frames(local, sta, tids, num,
1643 ieee80211_add_pending_skbs(local, &pending);
1646 ieee80211_send_null_response(
1647 sta, find_highest_prio_tid(tids),
1648 reason, false, false);
1650 sta_info_recalc_tim(sta);
1655 * We need to release a frame that is buffered somewhere in the
1656 * driver ... it'll have to handle that.
1657 * Note that the driver also has to check the number of frames
1658 * on the TIDs we're releasing from - if there are more than
1659 * n_frames it has to set the more-data bit (if we didn't ask
1660 * it to set it anyway due to other buffered frames); if there
1661 * are fewer than n_frames it has to make sure to adjust that
1662 * to allow the service period to end properly.
1664 drv_release_buffered_frames(local, sta, driver_release_tids,
1665 n_frames, reason, more_data);
1668 * Note that we don't recalculate the TIM bit here as it would
1669 * most likely have no effect at all unless the driver told us
1670 * that the TID(s) became empty before returning here from the
1672 * Either way, however, when the driver tells us that the TID(s)
1673 * became empty or we find that a txq became empty, we'll do the
1674 * TIM recalculation.
1677 if (!sta->sta.txq[0])
1680 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1681 if (!(driver_release_tids & BIT(tid)) ||
1682 txq_has_queue(sta->sta.txq[tid]))
1685 sta_info_recalc_tim(sta);
1691 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1693 u8 ignore_for_response = sta->sta.uapsd_queues;
1696 * If all ACs are delivery-enabled then we should reply
1697 * from any of them, if only some are enabled we reply
1698 * only from the non-enabled ones.
1700 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1701 ignore_for_response = 0;
1703 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1704 IEEE80211_FRAME_RELEASE_PSPOLL);
1707 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1709 int n_frames = sta->sta.max_sp;
1710 u8 delivery_enabled = sta->sta.uapsd_queues;
1713 * If we ever grow support for TSPEC this might happen if
1714 * the TSPEC update from hostapd comes in between a trigger
1715 * frame setting WLAN_STA_UAPSD in the RX path and this
1716 * actually getting called.
1718 if (!delivery_enabled)
1721 switch (sta->sta.max_sp) {
1732 /* XXX: what is a good value? */
1737 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1738 IEEE80211_FRAME_RELEASE_UAPSD);
1741 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1742 struct ieee80211_sta *pubsta, bool block)
1744 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1746 trace_api_sta_block_awake(sta->local, pubsta, block);
1749 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1750 ieee80211_clear_fast_xmit(sta);
1754 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1757 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1758 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1759 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1760 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1761 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1762 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1763 /* must be asleep in this case */
1764 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1765 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1767 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1768 ieee80211_check_fast_xmit(sta);
1771 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1773 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1775 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1776 struct ieee80211_local *local = sta->local;
1778 trace_api_eosp(local, pubsta);
1780 clear_sta_flag(sta, WLAN_STA_SP);
1782 EXPORT_SYMBOL(ieee80211_sta_eosp);
1784 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1786 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1787 enum ieee80211_frame_release_type reason;
1790 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1792 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1793 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1796 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1798 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1800 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1801 u8 tid, bool buffered)
1803 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1805 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1808 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1811 set_bit(tid, &sta->driver_buffered_tids);
1813 clear_bit(tid, &sta->driver_buffered_tids);
1815 sta_info_recalc_tim(sta);
1817 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1819 int sta_info_move_state(struct sta_info *sta,
1820 enum ieee80211_sta_state new_state)
1824 if (sta->sta_state == new_state)
1827 /* check allowed transitions first */
1829 switch (new_state) {
1830 case IEEE80211_STA_NONE:
1831 if (sta->sta_state != IEEE80211_STA_AUTH)
1834 case IEEE80211_STA_AUTH:
1835 if (sta->sta_state != IEEE80211_STA_NONE &&
1836 sta->sta_state != IEEE80211_STA_ASSOC)
1839 case IEEE80211_STA_ASSOC:
1840 if (sta->sta_state != IEEE80211_STA_AUTH &&
1841 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1844 case IEEE80211_STA_AUTHORIZED:
1845 if (sta->sta_state != IEEE80211_STA_ASSOC)
1849 WARN(1, "invalid state %d", new_state);
1853 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1854 sta->sta.addr, new_state);
1857 * notify the driver before the actual changes so it can
1858 * fail the transition
1860 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1861 int err = drv_sta_state(sta->local, sta->sdata, sta,
1862 sta->sta_state, new_state);
1867 /* reflect the change in all state variables */
1869 switch (new_state) {
1870 case IEEE80211_STA_NONE:
1871 if (sta->sta_state == IEEE80211_STA_AUTH)
1872 clear_bit(WLAN_STA_AUTH, &sta->_flags);
1874 case IEEE80211_STA_AUTH:
1875 if (sta->sta_state == IEEE80211_STA_NONE) {
1876 set_bit(WLAN_STA_AUTH, &sta->_flags);
1877 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
1878 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
1879 ieee80211_recalc_min_chandef(sta->sdata);
1880 if (!sta->sta.support_p2p_ps)
1881 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1884 case IEEE80211_STA_ASSOC:
1885 if (sta->sta_state == IEEE80211_STA_AUTH) {
1886 set_bit(WLAN_STA_ASSOC, &sta->_flags);
1887 ieee80211_recalc_min_chandef(sta->sdata);
1888 if (!sta->sta.support_p2p_ps)
1889 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
1890 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1891 ieee80211_vif_dec_num_mcast(sta->sdata);
1892 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1893 ieee80211_clear_fast_xmit(sta);
1894 ieee80211_clear_fast_rx(sta);
1897 case IEEE80211_STA_AUTHORIZED:
1898 if (sta->sta_state == IEEE80211_STA_ASSOC) {
1899 ieee80211_vif_inc_num_mcast(sta->sdata);
1900 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
1901 ieee80211_check_fast_xmit(sta);
1902 ieee80211_check_fast_rx(sta);
1909 sta->sta_state = new_state;
1914 u8 sta_info_tx_streams(struct sta_info *sta)
1916 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
1919 if (!sta->sta.ht_cap.ht_supported)
1922 if (sta->sta.vht_cap.vht_supported) {
1925 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
1927 for (i = 7; i >= 0; i--)
1928 if ((tx_mcs_map & (0x3 << (i * 2))) !=
1929 IEEE80211_VHT_MCS_NOT_SUPPORTED)
1933 if (ht_cap->mcs.rx_mask[3])
1935 else if (ht_cap->mcs.rx_mask[2])
1937 else if (ht_cap->mcs.rx_mask[1])
1942 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
1945 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1946 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
1949 static struct ieee80211_sta_rx_stats *
1950 sta_get_last_rx_stats(struct sta_info *sta)
1952 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
1953 struct ieee80211_local *local = sta->local;
1956 if (!ieee80211_hw_check(&local->hw, USES_RSS))
1959 for_each_possible_cpu(cpu) {
1960 struct ieee80211_sta_rx_stats *cpustats;
1962 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
1964 if (time_after(cpustats->last_rx, stats->last_rx))
1971 static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate,
1972 struct rate_info *rinfo)
1974 rinfo->bw = STA_STATS_GET(BW, rate);
1976 switch (STA_STATS_GET(TYPE, rate)) {
1977 case STA_STATS_RATE_TYPE_VHT:
1978 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
1979 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
1980 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
1981 if (STA_STATS_GET(SGI, rate))
1982 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1984 case STA_STATS_RATE_TYPE_HT:
1985 rinfo->flags = RATE_INFO_FLAGS_MCS;
1986 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
1987 if (STA_STATS_GET(SGI, rate))
1988 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
1990 case STA_STATS_RATE_TYPE_LEGACY: {
1991 struct ieee80211_supported_band *sband;
1994 int band = STA_STATS_GET(LEGACY_BAND, rate);
1995 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
1997 sband = local->hw.wiphy->bands[band];
1998 brate = sband->bitrates[rate_idx].bitrate;
1999 if (rinfo->bw == RATE_INFO_BW_5)
2001 else if (rinfo->bw == RATE_INFO_BW_10)
2005 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2011 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2013 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2015 if (rate == STA_STATS_RATE_INVALID)
2018 sta_stats_decode_rate(sta->local, rate, rinfo);
2022 static void sta_set_tidstats(struct sta_info *sta,
2023 struct cfg80211_tid_stats *tidstats,
2026 struct ieee80211_local *local = sta->local;
2028 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2032 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2033 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2034 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2036 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2039 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2040 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2041 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2044 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2045 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2046 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2047 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2050 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2051 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2052 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2053 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2056 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2057 spin_lock_bh(&local->fq.lock);
2060 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2061 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2062 to_txq_info(sta->sta.txq[tid]));
2065 spin_unlock_bh(&local->fq.lock);
2069 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2075 start = u64_stats_fetch_begin(&rxstats->syncp);
2076 value = rxstats->bytes;
2077 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2082 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2085 struct ieee80211_sub_if_data *sdata = sta->sdata;
2086 struct ieee80211_local *local = sdata->local;
2089 struct ieee80211_sta_rx_stats *last_rxstats;
2091 last_rxstats = sta_get_last_rx_stats(sta);
2093 sinfo->generation = sdata->local->sta_generation;
2095 /* do before driver, so beacon filtering drivers have a
2096 * chance to e.g. just add the number of filtered beacons
2097 * (or just modify the value entirely, of course)
2099 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2100 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2102 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2104 sinfo->filled |= BIT(NL80211_STA_INFO_INACTIVE_TIME) |
2105 BIT(NL80211_STA_INFO_STA_FLAGS) |
2106 BIT(NL80211_STA_INFO_BSS_PARAM) |
2107 BIT(NL80211_STA_INFO_CONNECTED_TIME) |
2108 BIT(NL80211_STA_INFO_RX_DROP_MISC);
2110 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2111 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2112 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_LOSS);
2115 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2116 sinfo->inactive_time =
2117 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2119 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |
2120 BIT(NL80211_STA_INFO_TX_BYTES)))) {
2121 sinfo->tx_bytes = 0;
2122 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2123 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2124 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BYTES64);
2127 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_PACKETS))) {
2128 sinfo->tx_packets = 0;
2129 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2130 sinfo->tx_packets += sta->tx_stats.packets[ac];
2131 sinfo->filled |= BIT(NL80211_STA_INFO_TX_PACKETS);
2134 if (!(sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES64) |
2135 BIT(NL80211_STA_INFO_RX_BYTES)))) {
2136 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2138 if (sta->pcpu_rx_stats) {
2139 for_each_possible_cpu(cpu) {
2140 struct ieee80211_sta_rx_stats *cpurxs;
2142 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2143 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2147 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BYTES64);
2150 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_PACKETS))) {
2151 sinfo->rx_packets = sta->rx_stats.packets;
2152 if (sta->pcpu_rx_stats) {
2153 for_each_possible_cpu(cpu) {
2154 struct ieee80211_sta_rx_stats *cpurxs;
2156 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2157 sinfo->rx_packets += cpurxs->packets;
2160 sinfo->filled |= BIT(NL80211_STA_INFO_RX_PACKETS);
2163 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_RETRIES))) {
2164 sinfo->tx_retries = sta->status_stats.retry_count;
2165 sinfo->filled |= BIT(NL80211_STA_INFO_TX_RETRIES);
2168 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_FAILED))) {
2169 sinfo->tx_failed = sta->status_stats.retry_failed;
2170 sinfo->filled |= BIT(NL80211_STA_INFO_TX_FAILED);
2173 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2174 if (sta->pcpu_rx_stats) {
2175 for_each_possible_cpu(cpu) {
2176 struct ieee80211_sta_rx_stats *cpurxs;
2178 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2179 sinfo->rx_dropped_misc += cpurxs->dropped;
2183 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2184 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2185 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX) |
2186 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2187 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2190 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2191 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2192 if (!(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL))) {
2193 sinfo->signal = (s8)last_rxstats->last_signal;
2194 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL);
2197 if (!sta->pcpu_rx_stats &&
2198 !(sinfo->filled & BIT(NL80211_STA_INFO_SIGNAL_AVG))) {
2200 -ewma_signal_read(&sta->rx_stats_avg.signal);
2201 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG);
2205 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2206 * the sta->rx_stats struct, so the check here is fine with and without
2209 if (last_rxstats->chains &&
2210 !(sinfo->filled & (BIT(NL80211_STA_INFO_CHAIN_SIGNAL) |
2211 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2212 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL);
2213 if (!sta->pcpu_rx_stats)
2214 sinfo->filled |= BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2216 sinfo->chains = last_rxstats->chains;
2218 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2219 sinfo->chain_signal[i] =
2220 last_rxstats->chain_signal_last[i];
2221 sinfo->chain_signal_avg[i] =
2222 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2226 if (!(sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE))) {
2227 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2229 sinfo->filled |= BIT(NL80211_STA_INFO_TX_BITRATE);
2232 if (!(sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE))) {
2233 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2234 sinfo->filled |= BIT(NL80211_STA_INFO_RX_BITRATE);
2237 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2238 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++) {
2239 struct cfg80211_tid_stats *tidstats = &sinfo->pertid[i];
2241 sta_set_tidstats(sta, tidstats, i);
2245 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2246 #ifdef CONFIG_MAC80211_MESH
2247 sinfo->filled |= BIT(NL80211_STA_INFO_LLID) |
2248 BIT(NL80211_STA_INFO_PLID) |
2249 BIT(NL80211_STA_INFO_PLINK_STATE) |
2250 BIT(NL80211_STA_INFO_LOCAL_PM) |
2251 BIT(NL80211_STA_INFO_PEER_PM) |
2252 BIT(NL80211_STA_INFO_NONPEER_PM);
2254 sinfo->llid = sta->mesh->llid;
2255 sinfo->plid = sta->mesh->plid;
2256 sinfo->plink_state = sta->mesh->plink_state;
2257 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2258 sinfo->filled |= BIT(NL80211_STA_INFO_T_OFFSET);
2259 sinfo->t_offset = sta->mesh->t_offset;
2261 sinfo->local_pm = sta->mesh->local_pm;
2262 sinfo->peer_pm = sta->mesh->peer_pm;
2263 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2267 sinfo->bss_param.flags = 0;
2268 if (sdata->vif.bss_conf.use_cts_prot)
2269 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2270 if (sdata->vif.bss_conf.use_short_preamble)
2271 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2272 if (sdata->vif.bss_conf.use_short_slot)
2273 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2274 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2275 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2277 sinfo->sta_flags.set = 0;
2278 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2279 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2280 BIT(NL80211_STA_FLAG_WME) |
2281 BIT(NL80211_STA_FLAG_MFP) |
2282 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2283 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2284 BIT(NL80211_STA_FLAG_TDLS_PEER);
2285 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2286 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2287 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2288 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2290 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2291 if (test_sta_flag(sta, WLAN_STA_MFP))
2292 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2293 if (test_sta_flag(sta, WLAN_STA_AUTH))
2294 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2295 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2296 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2297 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2298 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2300 thr = sta_get_expected_throughput(sta);
2303 sinfo->filled |= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2304 sinfo->expected_throughput = thr;
2307 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2308 sta->status_stats.ack_signal_filled) {
2309 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2310 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2313 if (ieee80211_hw_check(&sta->local->hw, REPORTS_TX_ACK_STATUS) &&
2314 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_DATA_ACK_SIGNAL_AVG))) {
2315 sinfo->avg_ack_signal =
2316 -(s8)ewma_avg_signal_read(
2317 &sta->status_stats.avg_ack_signal);
2319 BIT_ULL(NL80211_STA_INFO_DATA_ACK_SIGNAL_AVG);
2323 u32 sta_get_expected_throughput(struct sta_info *sta)
2325 struct ieee80211_sub_if_data *sdata = sta->sdata;
2326 struct ieee80211_local *local = sdata->local;
2327 struct rate_control_ref *ref = NULL;
2330 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2331 ref = local->rate_ctrl;
2333 /* check if the driver has a SW RC implementation */
2334 if (ref && ref->ops->get_expected_throughput)
2335 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2337 thr = drv_get_expected_throughput(local, sta);
2342 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2344 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2346 if (time_after(stats->last_rx, sta->status_stats.last_ack))
2347 return stats->last_rx;
2348 return sta->status_stats.last_ack;
2351 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2353 if (!sta->sdata->local->ops->wake_tx_queue)
2356 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2357 sta->cparams.target = MS2TIME(50);
2358 sta->cparams.interval = MS2TIME(300);
2359 sta->cparams.ecn = false;
2361 sta->cparams.target = MS2TIME(20);
2362 sta->cparams.interval = MS2TIME(100);
2363 sta->cparams.ecn = true;
2367 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2370 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2372 sta_update_codel_params(sta, thr);