1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
7 * Copyright (C) 2018-2020 Intel Corporation
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/timer.h>
19 #include <linux/rtnetlink.h>
21 #include <net/codel.h>
22 #include <net/mac80211.h>
23 #include "ieee80211_i.h"
24 #include "driver-ops.h"
27 #include "debugfs_sta.h"
32 * DOC: STA information lifetime rules
34 * STA info structures (&struct sta_info) are managed in a hash table
35 * for faster lookup and a list for iteration. They are managed using
36 * RCU, i.e. access to the list and hash table is protected by RCU.
38 * Upon allocating a STA info structure with sta_info_alloc(), the caller
39 * owns that structure. It must then insert it into the hash table using
40 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
41 * case (which acquires an rcu read section but must not be called from
42 * within one) will the pointer still be valid after the call. Note that
43 * the caller may not do much with the STA info before inserting it, in
44 * particular, it may not start any mesh peer link management or add
47 * When the insertion fails (sta_info_insert()) returns non-zero), the
48 * structure will have been freed by sta_info_insert()!
50 * Station entries are added by mac80211 when you establish a link with a
51 * peer. This means different things for the different type of interfaces
52 * we support. For a regular station this mean we add the AP sta when we
53 * receive an association response from the AP. For IBSS this occurs when
54 * get to know about a peer on the same IBSS. For WDS we add the sta for
55 * the peer immediately upon device open. When using AP mode we add stations
56 * for each respective station upon request from userspace through nl80211.
58 * In order to remove a STA info structure, various sta_info_destroy_*()
59 * calls are available.
61 * There is no concept of ownership on a STA entry, each structure is
62 * owned by the global hash table/list until it is removed. All users of
63 * the structure need to be RCU protected so that the structure won't be
64 * freed before they are done using it.
67 static const struct rhashtable_params sta_rht_params = {
68 .nelem_hint = 3, /* start small */
69 .automatic_shrinking = true,
70 .head_offset = offsetof(struct sta_info, hash_node),
71 .key_offset = offsetof(struct sta_info, addr),
73 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
76 /* Caller must hold local->sta_mtx */
77 static int sta_info_hash_del(struct ieee80211_local *local,
80 return rhltable_remove(&local->sta_hash, &sta->hash_node,
84 static void __cleanup_single_sta(struct sta_info *sta)
87 struct tid_ampdu_tx *tid_tx;
88 struct ieee80211_sub_if_data *sdata = sta->sdata;
89 struct ieee80211_local *local = sdata->local;
92 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
93 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
94 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
95 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
96 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
98 else if (ieee80211_vif_is_mesh(&sdata->vif))
99 ps = &sdata->u.mesh.ps;
103 clear_sta_flag(sta, WLAN_STA_PS_STA);
104 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
105 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
107 atomic_dec(&ps->num_sta_ps);
110 if (sta->sta.txq[0]) {
111 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
112 struct txq_info *txqi;
114 if (!sta->sta.txq[i])
117 txqi = to_txq_info(sta->sta.txq[i]);
119 ieee80211_txq_purge(local, txqi);
123 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
124 local->total_ps_buffered -= skb_queue_len(&sta->ps_tx_buf[ac]);
125 ieee80211_purge_tx_queue(&local->hw, &sta->ps_tx_buf[ac]);
126 ieee80211_purge_tx_queue(&local->hw, &sta->tx_filtered[ac]);
129 if (ieee80211_vif_is_mesh(&sdata->vif))
130 mesh_sta_cleanup(sta);
132 cancel_work_sync(&sta->drv_deliver_wk);
135 * Destroy aggregation state here. It would be nice to wait for the
136 * driver to finish aggregation stop and then clean up, but for now
137 * drivers have to handle aggregation stop being requested, followed
138 * directly by station destruction.
140 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
141 kfree(sta->ampdu_mlme.tid_start_tx[i]);
142 tid_tx = rcu_dereference_raw(sta->ampdu_mlme.tid_tx[i]);
145 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
150 static void cleanup_single_sta(struct sta_info *sta)
152 struct ieee80211_sub_if_data *sdata = sta->sdata;
153 struct ieee80211_local *local = sdata->local;
155 __cleanup_single_sta(sta);
156 sta_info_free(local, sta);
159 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
162 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
165 /* protected by RCU */
166 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
169 struct ieee80211_local *local = sdata->local;
170 struct rhlist_head *tmp;
171 struct sta_info *sta;
174 for_each_sta_info(local, addr, sta, tmp) {
175 if (sta->sdata == sdata) {
177 /* this is safe as the caller must already hold
178 * another rcu read section or the mutex
188 * Get sta info either from the specified interface
189 * or from one of its vlans
191 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
194 struct ieee80211_local *local = sdata->local;
195 struct rhlist_head *tmp;
196 struct sta_info *sta;
199 for_each_sta_info(local, addr, sta, tmp) {
200 if (sta->sdata == sdata ||
201 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
203 /* this is safe as the caller must already hold
204 * another rcu read section or the mutex
213 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
214 const u8 *sta_addr, const u8 *vif_addr)
216 struct rhlist_head *tmp;
217 struct sta_info *sta;
219 for_each_sta_info(local, sta_addr, sta, tmp) {
220 if (ether_addr_equal(vif_addr, sta->sdata->vif.addr))
227 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
230 struct ieee80211_local *local = sdata->local;
231 struct sta_info *sta;
234 list_for_each_entry_rcu(sta, &local->sta_list, list) {
235 if (sdata != sta->sdata)
248 * sta_info_free - free STA
250 * @local: pointer to the global information
251 * @sta: STA info to free
253 * This function must undo everything done by sta_info_alloc()
254 * that may happen before sta_info_insert(). It may only be
255 * called when sta_info_insert() has not been attempted (and
256 * if that fails, the station is freed anyway.)
258 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
261 rate_control_free_sta(sta);
263 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
266 kfree(to_txq_info(sta->sta.txq[0]));
267 kfree(rcu_dereference_raw(sta->sta.rates));
268 #ifdef CONFIG_MAC80211_MESH
271 free_percpu(sta->pcpu_rx_stats);
275 /* Caller must hold local->sta_mtx */
276 static int sta_info_hash_add(struct ieee80211_local *local,
277 struct sta_info *sta)
279 return rhltable_insert(&local->sta_hash, &sta->hash_node,
283 static void sta_deliver_ps_frames(struct work_struct *wk)
285 struct sta_info *sta;
287 sta = container_of(wk, struct sta_info, drv_deliver_wk);
293 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
294 ieee80211_sta_ps_deliver_wakeup(sta);
295 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
296 ieee80211_sta_ps_deliver_poll_response(sta);
297 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
298 ieee80211_sta_ps_deliver_uapsd(sta);
302 static int sta_prepare_rate_control(struct ieee80211_local *local,
303 struct sta_info *sta, gfp_t gfp)
305 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
308 sta->rate_ctrl = local->rate_ctrl;
309 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
311 if (!sta->rate_ctrl_priv)
317 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
318 const u8 *addr, gfp_t gfp)
320 struct ieee80211_local *local = sdata->local;
321 struct ieee80211_hw *hw = &local->hw;
322 struct sta_info *sta;
325 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
329 if (ieee80211_hw_check(hw, USES_RSS)) {
331 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
332 if (!sta->pcpu_rx_stats)
336 spin_lock_init(&sta->lock);
337 spin_lock_init(&sta->ps_lock);
338 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
339 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
340 mutex_init(&sta->ampdu_mlme.mtx);
341 #ifdef CONFIG_MAC80211_MESH
342 if (ieee80211_vif_is_mesh(&sdata->vif)) {
343 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
346 sta->mesh->plink_sta = sta;
347 spin_lock_init(&sta->mesh->plink_lock);
348 if (ieee80211_vif_is_mesh(&sdata->vif) &&
349 !sdata->u.mesh.user_mpm)
350 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
352 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
356 memcpy(sta->addr, addr, ETH_ALEN);
357 memcpy(sta->sta.addr, addr, ETH_ALEN);
358 sta->sta.max_rx_aggregation_subframes =
359 local->hw.max_rx_aggregation_subframes;
361 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
362 * The Tx path starts to use a key as soon as the key slot ptk_idx
363 * references to is not NULL. To not use the initial Rx-only key
364 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid
365 * which always will refer to a NULL key.
367 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
368 sta->ptk_idx = INVALID_PTK_KEYIDX;
372 sta->rx_stats.last_rx = jiffies;
374 u64_stats_init(&sta->rx_stats.syncp);
376 sta->sta_state = IEEE80211_STA_NONE;
378 /* Mark TID as unreserved */
379 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
381 sta->last_connected = ktime_get_seconds();
382 ewma_signal_init(&sta->rx_stats_avg.signal);
383 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
384 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
385 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
387 if (local->ops->wake_tx_queue) {
389 int size = sizeof(struct txq_info) +
390 ALIGN(hw->txq_data_size, sizeof(void *));
392 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
396 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
397 struct txq_info *txq = txq_data + i * size;
399 /* might not do anything for the bufferable MMPDU TXQ */
400 ieee80211_txq_init(sdata, sta, txq, i);
404 if (sta_prepare_rate_control(local, sta, gfp))
407 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT;
409 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
410 skb_queue_head_init(&sta->ps_tx_buf[i]);
411 skb_queue_head_init(&sta->tx_filtered[i]);
412 sta->airtime[i].deficit = sta->airtime_weight;
413 atomic_set(&sta->airtime[i].aql_tx_pending, 0);
414 sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i];
415 sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i];
418 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
419 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
421 for (i = 0; i < NUM_NL80211_BANDS; i++) {
425 if (!hw->wiphy->bands[i])
429 case NL80211_BAND_2GHZ:
431 * We use both here, even if we cannot really know for
432 * sure the station will support both, but the only use
433 * for this is when we don't know anything yet and send
434 * management frames, and then we'll pick the lowest
435 * possible rate anyway.
436 * If we don't include _G here, we cannot find a rate
437 * in P2P, and thus trigger the WARN_ONCE() in rate.c
439 mandatory = IEEE80211_RATE_MANDATORY_B |
440 IEEE80211_RATE_MANDATORY_G;
442 case NL80211_BAND_5GHZ:
443 mandatory = IEEE80211_RATE_MANDATORY_A;
445 case NL80211_BAND_60GHZ:
451 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) {
452 struct ieee80211_rate *rate;
454 rate = &hw->wiphy->bands[i]->bitrates[r];
456 if (!(rate->flags & mandatory))
458 sta->sta.supp_rates[i] |= BIT(r);
462 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
463 if (sdata->vif.type == NL80211_IFTYPE_AP ||
464 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
465 struct ieee80211_supported_band *sband;
468 sband = ieee80211_get_sband(sdata);
472 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
473 IEEE80211_HT_CAP_SM_PS_SHIFT;
475 * Assume that hostapd advertises our caps in the beacon and
476 * this is the known_smps_mode for a station that just assciated
479 case WLAN_HT_SMPS_CONTROL_DISABLED:
480 sta->known_smps_mode = IEEE80211_SMPS_OFF;
482 case WLAN_HT_SMPS_CONTROL_STATIC:
483 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
485 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
486 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
493 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
495 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
496 sta->cparams.target = MS2TIME(20);
497 sta->cparams.interval = MS2TIME(100);
498 sta->cparams.ecn = true;
500 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
506 kfree(to_txq_info(sta->sta.txq[0]));
508 free_percpu(sta->pcpu_rx_stats);
509 #ifdef CONFIG_MAC80211_MESH
516 static int sta_info_insert_check(struct sta_info *sta)
518 struct ieee80211_sub_if_data *sdata = sta->sdata;
521 * Can't be a WARN_ON because it can be triggered through a race:
522 * something inserts a STA (on one CPU) without holding the RTNL
523 * and another CPU turns off the net device.
525 if (unlikely(!ieee80211_sdata_running(sdata)))
528 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
529 is_multicast_ether_addr(sta->sta.addr)))
532 /* The RCU read lock is required by rhashtable due to
533 * asynchronous resize/rehash. We also require the mutex
537 lockdep_assert_held(&sdata->local->sta_mtx);
538 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
539 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
548 static int sta_info_insert_drv_state(struct ieee80211_local *local,
549 struct ieee80211_sub_if_data *sdata,
550 struct sta_info *sta)
552 enum ieee80211_sta_state state;
555 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
556 err = drv_sta_state(local, sdata, sta, state, state + 1);
563 * Drivers using legacy sta_add/sta_remove callbacks only
564 * get uploaded set to true after sta_add is called.
566 if (!local->ops->sta_add)
567 sta->uploaded = true;
571 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
573 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
574 sta->sta.addr, state + 1, err);
578 /* unwind on error */
579 for (; state > IEEE80211_STA_NOTEXIST; state--)
580 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
586 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
588 struct ieee80211_local *local = sdata->local;
589 bool allow_p2p_go_ps = sdata->vif.p2p;
590 struct sta_info *sta;
593 list_for_each_entry_rcu(sta, &local->sta_list, list) {
594 if (sdata != sta->sdata ||
595 !test_sta_flag(sta, WLAN_STA_ASSOC))
597 if (!sta->sta.support_p2p_ps) {
598 allow_p2p_go_ps = false;
604 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
605 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
606 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
611 * should be called with sta_mtx locked
612 * this function replaces the mutex lock
615 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
617 struct ieee80211_local *local = sta->local;
618 struct ieee80211_sub_if_data *sdata = sta->sdata;
619 struct station_info *sinfo = NULL;
622 lockdep_assert_held(&local->sta_mtx);
624 /* check if STA exists already */
625 if (sta_info_get_bss(sdata, sta->sta.addr)) {
630 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
637 local->sta_generation++;
640 /* simplify things and don't accept BA sessions yet */
641 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
643 /* make the station visible */
644 err = sta_info_hash_add(local, sta);
648 list_add_tail_rcu(&sta->list, &local->sta_list);
651 err = sta_info_insert_drv_state(local, sdata, sta);
655 set_sta_flag(sta, WLAN_STA_INSERTED);
657 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
658 ieee80211_recalc_min_chandef(sta->sdata);
659 if (!sta->sta.support_p2p_ps)
660 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
663 /* accept BA sessions now */
664 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
666 ieee80211_sta_debugfs_add(sta);
667 rate_control_add_sta_debugfs(sta);
669 sinfo->generation = local->sta_generation;
670 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
673 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
675 /* move reference to rcu-protected */
677 mutex_unlock(&local->sta_mtx);
679 if (ieee80211_vif_is_mesh(&sdata->vif))
680 mesh_accept_plinks_update(sdata);
684 sta_info_hash_del(local, sta);
685 list_del_rcu(&sta->list);
689 __cleanup_single_sta(sta);
691 mutex_unlock(&local->sta_mtx);
697 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
699 struct ieee80211_local *local = sta->local;
704 mutex_lock(&local->sta_mtx);
706 err = sta_info_insert_check(sta);
708 mutex_unlock(&local->sta_mtx);
713 err = sta_info_insert_finish(sta);
719 sta_info_free(local, sta);
723 int sta_info_insert(struct sta_info *sta)
725 int err = sta_info_insert_rcu(sta);
732 static inline void __bss_tim_set(u8 *tim, u16 id)
735 * This format has been mandated by the IEEE specifications,
736 * so this line may not be changed to use the __set_bit() format.
738 tim[id / 8] |= (1 << (id % 8));
741 static inline void __bss_tim_clear(u8 *tim, u16 id)
744 * This format has been mandated by the IEEE specifications,
745 * so this line may not be changed to use the __clear_bit() format.
747 tim[id / 8] &= ~(1 << (id % 8));
750 static inline bool __bss_tim_get(u8 *tim, u16 id)
753 * This format has been mandated by the IEEE specifications,
754 * so this line may not be changed to use the test_bit() format.
756 return tim[id / 8] & (1 << (id % 8));
759 static unsigned long ieee80211_tids_for_ac(int ac)
761 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
763 case IEEE80211_AC_VO:
764 return BIT(6) | BIT(7);
765 case IEEE80211_AC_VI:
766 return BIT(4) | BIT(5);
767 case IEEE80211_AC_BE:
768 return BIT(0) | BIT(3);
769 case IEEE80211_AC_BK:
770 return BIT(1) | BIT(2);
777 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
779 struct ieee80211_local *local = sta->local;
781 bool indicate_tim = false;
782 u8 ignore_for_tim = sta->sta.uapsd_queues;
784 u16 id = sta->sta.aid;
786 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
787 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
788 if (WARN_ON_ONCE(!sta->sdata->bss))
791 ps = &sta->sdata->bss->ps;
792 #ifdef CONFIG_MAC80211_MESH
793 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
794 ps = &sta->sdata->u.mesh.ps;
800 /* No need to do anything if the driver does all */
801 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
808 * If all ACs are delivery-enabled then we should build
809 * the TIM bit for all ACs anyway; if only some are then
810 * we ignore those and build the TIM bit using only the
813 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
817 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
819 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
822 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
825 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
826 !skb_queue_empty(&sta->ps_tx_buf[ac]);
830 tids = ieee80211_tids_for_ac(ac);
833 sta->driver_buffered_tids & tids;
835 sta->txq_buffered_tids & tids;
839 spin_lock_bh(&local->tim_lock);
841 if (indicate_tim == __bss_tim_get(ps->tim, id))
845 __bss_tim_set(ps->tim, id);
847 __bss_tim_clear(ps->tim, id);
849 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
850 local->tim_in_locked_section = true;
851 drv_set_tim(local, &sta->sta, indicate_tim);
852 local->tim_in_locked_section = false;
856 spin_unlock_bh(&local->tim_lock);
859 void sta_info_recalc_tim(struct sta_info *sta)
861 __sta_info_recalc_tim(sta, false);
864 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
866 struct ieee80211_tx_info *info;
872 info = IEEE80211_SKB_CB(skb);
874 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
875 timeout = (sta->listen_interval *
876 sta->sdata->vif.bss_conf.beacon_int *
878 if (timeout < STA_TX_BUFFER_EXPIRE)
879 timeout = STA_TX_BUFFER_EXPIRE;
880 return time_after(jiffies, info->control.jiffies + timeout);
884 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
885 struct sta_info *sta, int ac)
891 * First check for frames that should expire on the filtered
892 * queue. Frames here were rejected by the driver and are on
893 * a separate queue to avoid reordering with normal PS-buffered
894 * frames. They also aren't accounted for right now in the
895 * total_ps_buffered counter.
898 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
899 skb = skb_peek(&sta->tx_filtered[ac]);
900 if (sta_info_buffer_expired(sta, skb))
901 skb = __skb_dequeue(&sta->tx_filtered[ac]);
904 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
907 * Frames are queued in order, so if this one
908 * hasn't expired yet we can stop testing. If
909 * we actually reached the end of the queue we
910 * also need to stop, of course.
914 ieee80211_free_txskb(&local->hw, skb);
918 * Now also check the normal PS-buffered queue, this will
919 * only find something if the filtered queue was emptied
920 * since the filtered frames are all before the normal PS
924 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
925 skb = skb_peek(&sta->ps_tx_buf[ac]);
926 if (sta_info_buffer_expired(sta, skb))
927 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
930 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
933 * frames are queued in order, so if this one
934 * hasn't expired yet (or we reached the end of
935 * the queue) we can stop testing
940 local->total_ps_buffered--;
941 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
943 ieee80211_free_txskb(&local->hw, skb);
947 * Finally, recalculate the TIM bit for this station -- it might
948 * now be clear because the station was too slow to retrieve its
951 sta_info_recalc_tim(sta);
954 * Return whether there are any frames still buffered, this is
955 * used to check whether the cleanup timer still needs to run,
956 * if there are no frames we don't need to rearm the timer.
958 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
959 skb_queue_empty(&sta->tx_filtered[ac]));
962 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
963 struct sta_info *sta)
965 bool have_buffered = false;
968 /* This is only necessary for stations on BSS/MBSS interfaces */
969 if (!sta->sdata->bss &&
970 !ieee80211_vif_is_mesh(&sta->sdata->vif))
973 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
975 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
977 return have_buffered;
980 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
982 struct ieee80211_local *local;
983 struct ieee80211_sub_if_data *sdata;
994 lockdep_assert_held(&local->sta_mtx);
997 * Before removing the station from the driver and
998 * rate control, it might still start new aggregation
999 * sessions -- block that to make sure the tear-down
1000 * will be sufficient.
1002 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1003 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
1006 * Before removing the station from the driver there might be pending
1007 * rx frames on RSS queues sent prior to the disassociation - wait for
1008 * all such frames to be processed.
1010 drv_sync_rx_queues(local, sta);
1012 ret = sta_info_hash_del(local, sta);
1017 * for TDLS peers, make sure to return to the base channel before
1020 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
1021 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
1022 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
1025 list_del_rcu(&sta->list);
1026 sta->removed = true;
1028 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
1030 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1031 rcu_access_pointer(sdata->u.vlan.sta) == sta)
1032 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
1037 static void __sta_info_destroy_part2(struct sta_info *sta)
1039 struct ieee80211_local *local = sta->local;
1040 struct ieee80211_sub_if_data *sdata = sta->sdata;
1041 struct station_info *sinfo;
1045 * NOTE: This assumes at least synchronize_net() was done
1046 * after _part1 and before _part2!
1050 lockdep_assert_held(&local->sta_mtx);
1052 while (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1053 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1057 /* now keys can no longer be reached */
1058 ieee80211_free_sta_keys(local, sta);
1060 /* disable TIM bit - last chance to tell driver */
1061 __sta_info_recalc_tim(sta, true);
1066 local->sta_generation++;
1068 while (sta->sta_state > IEEE80211_STA_NONE) {
1069 ret = sta_info_move_state(sta, sta->sta_state - 1);
1076 if (sta->uploaded) {
1077 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1078 IEEE80211_STA_NOTEXIST);
1079 WARN_ON_ONCE(ret != 0);
1082 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1084 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1086 sta_set_sinfo(sta, sinfo, true);
1087 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1090 ieee80211_sta_debugfs_remove(sta);
1092 cleanup_single_sta(sta);
1095 int __must_check __sta_info_destroy(struct sta_info *sta)
1097 int err = __sta_info_destroy_part1(sta);
1104 __sta_info_destroy_part2(sta);
1109 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1111 struct sta_info *sta;
1114 mutex_lock(&sdata->local->sta_mtx);
1115 sta = sta_info_get(sdata, addr);
1116 ret = __sta_info_destroy(sta);
1117 mutex_unlock(&sdata->local->sta_mtx);
1122 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1125 struct sta_info *sta;
1128 mutex_lock(&sdata->local->sta_mtx);
1129 sta = sta_info_get_bss(sdata, addr);
1130 ret = __sta_info_destroy(sta);
1131 mutex_unlock(&sdata->local->sta_mtx);
1136 static void sta_info_cleanup(struct timer_list *t)
1138 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1139 struct sta_info *sta;
1140 bool timer_needed = false;
1143 list_for_each_entry_rcu(sta, &local->sta_list, list)
1144 if (sta_info_cleanup_expire_buffered(local, sta))
1145 timer_needed = true;
1148 if (local->quiescing)
1154 mod_timer(&local->sta_cleanup,
1155 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1158 int sta_info_init(struct ieee80211_local *local)
1162 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1166 spin_lock_init(&local->tim_lock);
1167 mutex_init(&local->sta_mtx);
1168 INIT_LIST_HEAD(&local->sta_list);
1170 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1174 void sta_info_stop(struct ieee80211_local *local)
1176 del_timer_sync(&local->sta_cleanup);
1177 rhltable_destroy(&local->sta_hash);
1181 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1183 struct ieee80211_local *local = sdata->local;
1184 struct sta_info *sta, *tmp;
1185 LIST_HEAD(free_list);
1190 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1191 WARN_ON(vlans && !sdata->bss);
1193 mutex_lock(&local->sta_mtx);
1194 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1195 if (sdata == sta->sdata ||
1196 (vlans && sdata->bss == sta->sdata->bss)) {
1197 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1198 list_add(&sta->free_list, &free_list);
1203 if (!list_empty(&free_list)) {
1205 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1206 __sta_info_destroy_part2(sta);
1208 mutex_unlock(&local->sta_mtx);
1213 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1214 unsigned long exp_time)
1216 struct ieee80211_local *local = sdata->local;
1217 struct sta_info *sta, *tmp;
1219 mutex_lock(&local->sta_mtx);
1221 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1222 unsigned long last_active = ieee80211_sta_last_active(sta);
1224 if (sdata != sta->sdata)
1227 if (time_is_before_jiffies(last_active + exp_time)) {
1228 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1231 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1232 test_sta_flag(sta, WLAN_STA_PS_STA))
1233 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1235 WARN_ON(__sta_info_destroy(sta));
1239 mutex_unlock(&local->sta_mtx);
1242 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1244 const u8 *localaddr)
1246 struct ieee80211_local *local = hw_to_local(hw);
1247 struct rhlist_head *tmp;
1248 struct sta_info *sta;
1251 * Just return a random station if localaddr is NULL
1252 * ... first in list.
1254 for_each_sta_info(local, addr, sta, tmp) {
1256 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1265 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1267 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1270 struct sta_info *sta;
1275 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1284 EXPORT_SYMBOL(ieee80211_find_sta);
1286 /* powersave support code */
1287 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1289 struct ieee80211_sub_if_data *sdata = sta->sdata;
1290 struct ieee80211_local *local = sdata->local;
1291 struct sk_buff_head pending;
1292 int filtered = 0, buffered = 0, ac, i;
1293 unsigned long flags;
1296 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1297 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1300 if (sdata->vif.type == NL80211_IFTYPE_AP)
1301 ps = &sdata->bss->ps;
1302 else if (ieee80211_vif_is_mesh(&sdata->vif))
1303 ps = &sdata->u.mesh.ps;
1307 clear_sta_flag(sta, WLAN_STA_SP);
1309 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1310 sta->driver_buffered_tids = 0;
1311 sta->txq_buffered_tids = 0;
1313 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1314 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1316 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1317 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
1320 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i]));
1323 skb_queue_head_init(&pending);
1325 /* sync with ieee80211_tx_h_unicast_ps_buf */
1326 spin_lock(&sta->ps_lock);
1327 /* Send all buffered frames to the station */
1328 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1329 int count = skb_queue_len(&pending), tmp;
1331 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1332 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1333 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1334 tmp = skb_queue_len(&pending);
1335 filtered += tmp - count;
1338 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1339 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1340 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1341 tmp = skb_queue_len(&pending);
1342 buffered += tmp - count;
1345 ieee80211_add_pending_skbs(local, &pending);
1347 /* now we're no longer in the deliver code */
1348 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1350 /* The station might have polled and then woken up before we responded,
1351 * so clear these flags now to avoid them sticking around.
1353 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1354 clear_sta_flag(sta, WLAN_STA_UAPSD);
1355 spin_unlock(&sta->ps_lock);
1357 atomic_dec(&ps->num_sta_ps);
1359 /* This station just woke up and isn't aware of our SMPS state */
1360 if (!ieee80211_vif_is_mesh(&sdata->vif) &&
1361 !ieee80211_smps_is_restrictive(sta->known_smps_mode,
1362 sdata->smps_mode) &&
1363 sta->known_smps_mode != sdata->bss->req_smps &&
1364 sta_info_tx_streams(sta) != 1) {
1366 "%pM just woke up and MIMO capable - update SMPS\n",
1368 ieee80211_send_smps_action(sdata, sdata->bss->req_smps,
1370 sdata->vif.bss_conf.bssid);
1373 local->total_ps_buffered -= buffered;
1375 sta_info_recalc_tim(sta);
1378 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1379 sta->sta.addr, sta->sta.aid, filtered, buffered);
1381 ieee80211_check_fast_xmit(sta);
1384 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1385 enum ieee80211_frame_release_type reason,
1386 bool call_driver, bool more_data)
1388 struct ieee80211_sub_if_data *sdata = sta->sdata;
1389 struct ieee80211_local *local = sdata->local;
1390 struct ieee80211_qos_hdr *nullfunc;
1391 struct sk_buff *skb;
1392 int size = sizeof(*nullfunc);
1394 bool qos = sta->sta.wme;
1395 struct ieee80211_tx_info *info;
1396 struct ieee80211_chanctx_conf *chanctx_conf;
1398 /* Don't send NDPs when STA is connected HE */
1399 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1400 !(sdata->u.mgd.flags & IEEE80211_STA_DISABLE_HE))
1404 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1405 IEEE80211_STYPE_QOS_NULLFUNC |
1406 IEEE80211_FCTL_FROMDS);
1409 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1410 IEEE80211_STYPE_NULLFUNC |
1411 IEEE80211_FCTL_FROMDS);
1414 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1418 skb_reserve(skb, local->hw.extra_tx_headroom);
1420 nullfunc = skb_put(skb, size);
1421 nullfunc->frame_control = fc;
1422 nullfunc->duration_id = 0;
1423 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1424 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1425 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1426 nullfunc->seq_ctrl = 0;
1428 skb->priority = tid;
1429 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1431 nullfunc->qos_ctrl = cpu_to_le16(tid);
1433 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1434 nullfunc->qos_ctrl |=
1435 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1437 nullfunc->frame_control |=
1438 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1442 info = IEEE80211_SKB_CB(skb);
1445 * Tell TX path to send this frame even though the
1446 * STA may still remain is PS mode after this frame
1447 * exchange. Also set EOSP to indicate this packet
1448 * ends the poll/service period.
1450 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1451 IEEE80211_TX_STATUS_EOSP |
1452 IEEE80211_TX_CTL_REQ_TX_STATUS;
1454 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1457 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1460 skb->dev = sdata->dev;
1463 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1464 if (WARN_ON(!chanctx_conf)) {
1470 info->band = chanctx_conf->def.chan->band;
1471 ieee80211_xmit(sdata, sta, skb, 0);
1475 static int find_highest_prio_tid(unsigned long tids)
1477 /* lower 3 TIDs aren't ordered perfectly */
1479 return fls(tids) - 1;
1480 /* TID 0 is BE just like TID 3 */
1483 return fls(tids) - 1;
1486 /* Indicates if the MORE_DATA bit should be set in the last
1487 * frame obtained by ieee80211_sta_ps_get_frames.
1488 * Note that driver_release_tids is relevant only if
1489 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1492 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1493 enum ieee80211_frame_release_type reason,
1494 unsigned long driver_release_tids)
1498 /* If the driver has data on more than one TID then
1499 * certainly there's more data if we release just a
1500 * single frame now (from a single TID). This will
1501 * only happen for PS-Poll.
1503 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1504 hweight16(driver_release_tids) > 1)
1507 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1508 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1511 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1512 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1520 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1521 enum ieee80211_frame_release_type reason,
1522 struct sk_buff_head *frames,
1523 unsigned long *driver_release_tids)
1525 struct ieee80211_sub_if_data *sdata = sta->sdata;
1526 struct ieee80211_local *local = sdata->local;
1529 /* Get response frame(s) and more data bit for the last one. */
1530 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1533 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1536 tids = ieee80211_tids_for_ac(ac);
1538 /* if we already have frames from software, then we can't also
1539 * release from hardware queues
1541 if (skb_queue_empty(frames)) {
1542 *driver_release_tids |=
1543 sta->driver_buffered_tids & tids;
1544 *driver_release_tids |= sta->txq_buffered_tids & tids;
1547 if (!*driver_release_tids) {
1548 struct sk_buff *skb;
1550 while (n_frames > 0) {
1551 skb = skb_dequeue(&sta->tx_filtered[ac]);
1554 &sta->ps_tx_buf[ac]);
1556 local->total_ps_buffered--;
1561 __skb_queue_tail(frames, skb);
1565 /* If we have more frames buffered on this AC, then abort the
1566 * loop since we can't send more data from other ACs before
1567 * the buffered frames from this.
1569 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1570 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1576 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1577 int n_frames, u8 ignored_acs,
1578 enum ieee80211_frame_release_type reason)
1580 struct ieee80211_sub_if_data *sdata = sta->sdata;
1581 struct ieee80211_local *local = sdata->local;
1582 unsigned long driver_release_tids = 0;
1583 struct sk_buff_head frames;
1586 /* Service or PS-Poll period starts */
1587 set_sta_flag(sta, WLAN_STA_SP);
1589 __skb_queue_head_init(&frames);
1591 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1592 &frames, &driver_release_tids);
1594 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1596 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1597 driver_release_tids =
1598 BIT(find_highest_prio_tid(driver_release_tids));
1600 if (skb_queue_empty(&frames) && !driver_release_tids) {
1604 * For PS-Poll, this can only happen due to a race condition
1605 * when we set the TIM bit and the station notices it, but
1606 * before it can poll for the frame we expire it.
1608 * For uAPSD, this is said in the standard (11.2.1.5 h):
1609 * At each unscheduled SP for a non-AP STA, the AP shall
1610 * attempt to transmit at least one MSDU or MMPDU, but no
1611 * more than the value specified in the Max SP Length field
1612 * in the QoS Capability element from delivery-enabled ACs,
1613 * that are destined for the non-AP STA.
1615 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1618 /* This will evaluate to 1, 3, 5 or 7. */
1619 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1620 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1624 ieee80211_send_null_response(sta, tid, reason, true, false);
1625 } else if (!driver_release_tids) {
1626 struct sk_buff_head pending;
1627 struct sk_buff *skb;
1630 bool need_null = false;
1632 skb_queue_head_init(&pending);
1634 while ((skb = __skb_dequeue(&frames))) {
1635 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1636 struct ieee80211_hdr *hdr = (void *) skb->data;
1642 * Tell TX path to send this frame even though the
1643 * STA may still remain is PS mode after this frame
1646 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1647 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1650 * Use MoreData flag to indicate whether there are
1651 * more buffered frames for this STA
1653 if (more_data || !skb_queue_empty(&frames))
1654 hdr->frame_control |=
1655 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1657 hdr->frame_control &=
1658 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1660 if (ieee80211_is_data_qos(hdr->frame_control) ||
1661 ieee80211_is_qos_nullfunc(hdr->frame_control))
1662 qoshdr = ieee80211_get_qos_ctl(hdr);
1664 tids |= BIT(skb->priority);
1666 __skb_queue_tail(&pending, skb);
1668 /* end service period after last frame or add one */
1669 if (!skb_queue_empty(&frames))
1672 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1673 /* for PS-Poll, there's only one frame */
1674 info->flags |= IEEE80211_TX_STATUS_EOSP |
1675 IEEE80211_TX_CTL_REQ_TX_STATUS;
1679 /* For uAPSD, things are a bit more complicated. If the
1680 * last frame has a QoS header (i.e. is a QoS-data or
1681 * QoS-nulldata frame) then just set the EOSP bit there
1683 * If the frame doesn't have a QoS header (which means
1684 * it should be a bufferable MMPDU) then we can't set
1685 * the EOSP bit in the QoS header; add a QoS-nulldata
1686 * frame to the list to send it after the MMPDU.
1688 * Note that this code is only in the mac80211-release
1689 * code path, we assume that the driver will not buffer
1690 * anything but QoS-data frames, or if it does, will
1691 * create the QoS-nulldata frame by itself if needed.
1693 * Cf. 802.11-2012 10.2.1.10 (c).
1696 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1698 info->flags |= IEEE80211_TX_STATUS_EOSP |
1699 IEEE80211_TX_CTL_REQ_TX_STATUS;
1701 /* The standard isn't completely clear on this
1702 * as it says the more-data bit should be set
1703 * if there are more BUs. The QoS-Null frame
1704 * we're about to send isn't buffered yet, we
1705 * only create it below, but let's pretend it
1706 * was buffered just in case some clients only
1707 * expect more-data=0 when eosp=1.
1709 hdr->frame_control |=
1710 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1717 drv_allow_buffered_frames(local, sta, tids, num,
1720 ieee80211_add_pending_skbs(local, &pending);
1723 ieee80211_send_null_response(
1724 sta, find_highest_prio_tid(tids),
1725 reason, false, false);
1727 sta_info_recalc_tim(sta);
1732 * We need to release a frame that is buffered somewhere in the
1733 * driver ... it'll have to handle that.
1734 * Note that the driver also has to check the number of frames
1735 * on the TIDs we're releasing from - if there are more than
1736 * n_frames it has to set the more-data bit (if we didn't ask
1737 * it to set it anyway due to other buffered frames); if there
1738 * are fewer than n_frames it has to make sure to adjust that
1739 * to allow the service period to end properly.
1741 drv_release_buffered_frames(local, sta, driver_release_tids,
1742 n_frames, reason, more_data);
1745 * Note that we don't recalculate the TIM bit here as it would
1746 * most likely have no effect at all unless the driver told us
1747 * that the TID(s) became empty before returning here from the
1749 * Either way, however, when the driver tells us that the TID(s)
1750 * became empty or we find that a txq became empty, we'll do the
1751 * TIM recalculation.
1754 if (!sta->sta.txq[0])
1757 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1758 if (!sta->sta.txq[tid] ||
1759 !(driver_release_tids & BIT(tid)) ||
1760 txq_has_queue(sta->sta.txq[tid]))
1763 sta_info_recalc_tim(sta);
1769 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1771 u8 ignore_for_response = sta->sta.uapsd_queues;
1774 * If all ACs are delivery-enabled then we should reply
1775 * from any of them, if only some are enabled we reply
1776 * only from the non-enabled ones.
1778 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1779 ignore_for_response = 0;
1781 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1782 IEEE80211_FRAME_RELEASE_PSPOLL);
1785 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1787 int n_frames = sta->sta.max_sp;
1788 u8 delivery_enabled = sta->sta.uapsd_queues;
1791 * If we ever grow support for TSPEC this might happen if
1792 * the TSPEC update from hostapd comes in between a trigger
1793 * frame setting WLAN_STA_UAPSD in the RX path and this
1794 * actually getting called.
1796 if (!delivery_enabled)
1799 switch (sta->sta.max_sp) {
1810 /* XXX: what is a good value? */
1815 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1816 IEEE80211_FRAME_RELEASE_UAPSD);
1819 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1820 struct ieee80211_sta *pubsta, bool block)
1822 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1824 trace_api_sta_block_awake(sta->local, pubsta, block);
1827 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1828 ieee80211_clear_fast_xmit(sta);
1832 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1835 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1836 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1837 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1838 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1839 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1840 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1841 /* must be asleep in this case */
1842 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1843 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1845 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1846 ieee80211_check_fast_xmit(sta);
1849 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1851 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1853 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1854 struct ieee80211_local *local = sta->local;
1856 trace_api_eosp(local, pubsta);
1858 clear_sta_flag(sta, WLAN_STA_SP);
1860 EXPORT_SYMBOL(ieee80211_sta_eosp);
1862 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1864 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1865 enum ieee80211_frame_release_type reason;
1868 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1870 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1871 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1874 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1876 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1878 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1879 u8 tid, bool buffered)
1881 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1883 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1886 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1889 set_bit(tid, &sta->driver_buffered_tids);
1891 clear_bit(tid, &sta->driver_buffered_tids);
1893 sta_info_recalc_tim(sta);
1895 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1897 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
1898 u32 tx_airtime, u32 rx_airtime)
1900 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1901 struct ieee80211_local *local = sta->sdata->local;
1902 u8 ac = ieee80211_ac_from_tid(tid);
1905 if (sta->local->airtime_flags & AIRTIME_USE_TX)
1906 airtime += tx_airtime;
1907 if (sta->local->airtime_flags & AIRTIME_USE_RX)
1908 airtime += rx_airtime;
1910 spin_lock_bh(&local->active_txq_lock[ac]);
1911 sta->airtime[ac].tx_airtime += tx_airtime;
1912 sta->airtime[ac].rx_airtime += rx_airtime;
1913 sta->airtime[ac].deficit -= airtime;
1914 spin_unlock_bh(&local->active_txq_lock[ac]);
1916 EXPORT_SYMBOL(ieee80211_sta_register_airtime);
1918 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
1919 struct sta_info *sta, u8 ac,
1920 u16 tx_airtime, bool tx_completed)
1924 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
1927 if (!tx_completed) {
1929 atomic_add(tx_airtime,
1930 &sta->airtime[ac].aql_tx_pending);
1932 atomic_add(tx_airtime, &local->aql_total_pending_airtime);
1937 tx_pending = atomic_sub_return(tx_airtime,
1938 &sta->airtime[ac].aql_tx_pending);
1939 if (WARN_ONCE(tx_pending < 0,
1940 "STA %pM AC %d txq pending airtime underflow: %u, %u",
1941 sta->addr, ac, tx_pending, tx_airtime))
1942 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending,
1946 tx_pending = atomic_sub_return(tx_airtime,
1947 &local->aql_total_pending_airtime);
1948 if (WARN_ONCE(tx_pending < 0,
1949 "Device %s AC %d pending airtime underflow: %u, %u",
1950 wiphy_name(local->hw.wiphy), ac, tx_pending,
1952 atomic_cmpxchg(&local->aql_total_pending_airtime,
1956 int sta_info_move_state(struct sta_info *sta,
1957 enum ieee80211_sta_state new_state)
1961 if (sta->sta_state == new_state)
1964 /* check allowed transitions first */
1966 switch (new_state) {
1967 case IEEE80211_STA_NONE:
1968 if (sta->sta_state != IEEE80211_STA_AUTH)
1971 case IEEE80211_STA_AUTH:
1972 if (sta->sta_state != IEEE80211_STA_NONE &&
1973 sta->sta_state != IEEE80211_STA_ASSOC)
1976 case IEEE80211_STA_ASSOC:
1977 if (sta->sta_state != IEEE80211_STA_AUTH &&
1978 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1981 case IEEE80211_STA_AUTHORIZED:
1982 if (sta->sta_state != IEEE80211_STA_ASSOC)
1986 WARN(1, "invalid state %d", new_state);
1990 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1991 sta->sta.addr, new_state);
1994 * notify the driver before the actual changes so it can
1995 * fail the transition
1997 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1998 int err = drv_sta_state(sta->local, sta->sdata, sta,
1999 sta->sta_state, new_state);
2004 /* reflect the change in all state variables */
2006 switch (new_state) {
2007 case IEEE80211_STA_NONE:
2008 if (sta->sta_state == IEEE80211_STA_AUTH)
2009 clear_bit(WLAN_STA_AUTH, &sta->_flags);
2011 case IEEE80211_STA_AUTH:
2012 if (sta->sta_state == IEEE80211_STA_NONE) {
2013 set_bit(WLAN_STA_AUTH, &sta->_flags);
2014 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
2015 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
2016 ieee80211_recalc_min_chandef(sta->sdata);
2017 if (!sta->sta.support_p2p_ps)
2018 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2021 case IEEE80211_STA_ASSOC:
2022 if (sta->sta_state == IEEE80211_STA_AUTH) {
2023 set_bit(WLAN_STA_ASSOC, &sta->_flags);
2024 sta->assoc_at = ktime_get_boottime_ns();
2025 ieee80211_recalc_min_chandef(sta->sdata);
2026 if (!sta->sta.support_p2p_ps)
2027 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2028 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
2029 ieee80211_vif_dec_num_mcast(sta->sdata);
2030 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2031 ieee80211_clear_fast_xmit(sta);
2032 ieee80211_clear_fast_rx(sta);
2035 case IEEE80211_STA_AUTHORIZED:
2036 if (sta->sta_state == IEEE80211_STA_ASSOC) {
2037 ieee80211_vif_inc_num_mcast(sta->sdata);
2038 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2039 ieee80211_check_fast_xmit(sta);
2040 ieee80211_check_fast_rx(sta);
2042 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2043 sta->sdata->vif.type == NL80211_IFTYPE_AP)
2044 cfg80211_send_layer2_update(sta->sdata->dev,
2051 sta->sta_state = new_state;
2056 u8 sta_info_tx_streams(struct sta_info *sta)
2058 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
2061 if (!sta->sta.ht_cap.ht_supported)
2064 if (sta->sta.vht_cap.vht_supported) {
2067 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
2069 for (i = 7; i >= 0; i--)
2070 if ((tx_mcs_map & (0x3 << (i * 2))) !=
2071 IEEE80211_VHT_MCS_NOT_SUPPORTED)
2075 if (ht_cap->mcs.rx_mask[3])
2077 else if (ht_cap->mcs.rx_mask[2])
2079 else if (ht_cap->mcs.rx_mask[1])
2084 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
2087 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2088 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
2091 static struct ieee80211_sta_rx_stats *
2092 sta_get_last_rx_stats(struct sta_info *sta)
2094 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
2095 struct ieee80211_local *local = sta->local;
2098 if (!ieee80211_hw_check(&local->hw, USES_RSS))
2101 for_each_possible_cpu(cpu) {
2102 struct ieee80211_sta_rx_stats *cpustats;
2104 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2106 if (time_after(cpustats->last_rx, stats->last_rx))
2113 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2114 struct rate_info *rinfo)
2116 rinfo->bw = STA_STATS_GET(BW, rate);
2118 switch (STA_STATS_GET(TYPE, rate)) {
2119 case STA_STATS_RATE_TYPE_VHT:
2120 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2121 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2122 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2123 if (STA_STATS_GET(SGI, rate))
2124 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2126 case STA_STATS_RATE_TYPE_HT:
2127 rinfo->flags = RATE_INFO_FLAGS_MCS;
2128 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2129 if (STA_STATS_GET(SGI, rate))
2130 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2132 case STA_STATS_RATE_TYPE_LEGACY: {
2133 struct ieee80211_supported_band *sband;
2136 int band = STA_STATS_GET(LEGACY_BAND, rate);
2137 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2139 sband = local->hw.wiphy->bands[band];
2140 brate = sband->bitrates[rate_idx].bitrate;
2141 if (rinfo->bw == RATE_INFO_BW_5)
2143 else if (rinfo->bw == RATE_INFO_BW_10)
2147 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2150 case STA_STATS_RATE_TYPE_HE:
2151 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2152 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2153 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2154 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2155 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2156 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2161 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2163 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2165 if (rate == STA_STATS_RATE_INVALID)
2168 sta_stats_decode_rate(sta->local, rate, rinfo);
2172 static void sta_set_tidstats(struct sta_info *sta,
2173 struct cfg80211_tid_stats *tidstats,
2176 struct ieee80211_local *local = sta->local;
2178 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2182 start = u64_stats_fetch_begin(&sta->rx_stats.syncp);
2183 tidstats->rx_msdu = sta->rx_stats.msdu[tid];
2184 } while (u64_stats_fetch_retry(&sta->rx_stats.syncp, start));
2186 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2189 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2190 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2191 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2194 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2195 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2196 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2197 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2200 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2201 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2202 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2203 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2206 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2207 spin_lock_bh(&local->fq.lock);
2210 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2211 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2212 to_txq_info(sta->sta.txq[tid]));
2215 spin_unlock_bh(&local->fq.lock);
2219 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2225 start = u64_stats_fetch_begin(&rxstats->syncp);
2226 value = rxstats->bytes;
2227 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2232 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2235 struct ieee80211_sub_if_data *sdata = sta->sdata;
2236 struct ieee80211_local *local = sdata->local;
2239 struct ieee80211_sta_rx_stats *last_rxstats;
2241 last_rxstats = sta_get_last_rx_stats(sta);
2243 sinfo->generation = sdata->local->sta_generation;
2245 /* do before driver, so beacon filtering drivers have a
2246 * chance to e.g. just add the number of filtered beacons
2247 * (or just modify the value entirely, of course)
2249 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2250 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2252 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2254 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2255 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2256 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2257 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2258 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
2259 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2261 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2262 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2263 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2266 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2267 sinfo->assoc_at = sta->assoc_at;
2268 sinfo->inactive_time =
2269 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2271 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2272 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2273 sinfo->tx_bytes = 0;
2274 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2275 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2276 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2279 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2280 sinfo->tx_packets = 0;
2281 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2282 sinfo->tx_packets += sta->tx_stats.packets[ac];
2283 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2286 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2287 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2288 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2290 if (sta->pcpu_rx_stats) {
2291 for_each_possible_cpu(cpu) {
2292 struct ieee80211_sta_rx_stats *cpurxs;
2294 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2295 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2299 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2302 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2303 sinfo->rx_packets = sta->rx_stats.packets;
2304 if (sta->pcpu_rx_stats) {
2305 for_each_possible_cpu(cpu) {
2306 struct ieee80211_sta_rx_stats *cpurxs;
2308 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2309 sinfo->rx_packets += cpurxs->packets;
2312 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2315 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2316 sinfo->tx_retries = sta->status_stats.retry_count;
2317 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2320 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2321 sinfo->tx_failed = sta->status_stats.retry_failed;
2322 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2325 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
2326 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2327 sinfo->rx_duration += sta->airtime[ac].rx_airtime;
2328 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
2331 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
2332 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2333 sinfo->tx_duration += sta->airtime[ac].tx_airtime;
2334 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
2337 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
2338 sinfo->airtime_weight = sta->airtime_weight;
2339 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
2342 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2343 if (sta->pcpu_rx_stats) {
2344 for_each_possible_cpu(cpu) {
2345 struct ieee80211_sta_rx_stats *cpurxs;
2347 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2348 sinfo->rx_dropped_misc += cpurxs->dropped;
2352 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2353 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2354 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2355 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2356 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2359 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2360 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2361 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2362 sinfo->signal = (s8)last_rxstats->last_signal;
2363 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2366 if (!sta->pcpu_rx_stats &&
2367 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2369 -ewma_signal_read(&sta->rx_stats_avg.signal);
2370 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2374 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2375 * the sta->rx_stats struct, so the check here is fine with and without
2378 if (last_rxstats->chains &&
2379 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2380 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2381 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2382 if (!sta->pcpu_rx_stats)
2383 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2385 sinfo->chains = last_rxstats->chains;
2387 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2388 sinfo->chain_signal[i] =
2389 last_rxstats->chain_signal_last[i];
2390 sinfo->chain_signal_avg[i] =
2391 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2395 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2396 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2398 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2401 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2402 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2403 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2406 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2407 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
2408 sta_set_tidstats(sta, &sinfo->pertid[i], i);
2411 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2412 #ifdef CONFIG_MAC80211_MESH
2413 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2414 BIT_ULL(NL80211_STA_INFO_PLID) |
2415 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2416 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2417 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2418 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
2419 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE);
2421 sinfo->llid = sta->mesh->llid;
2422 sinfo->plid = sta->mesh->plid;
2423 sinfo->plink_state = sta->mesh->plink_state;
2424 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2425 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2426 sinfo->t_offset = sta->mesh->t_offset;
2428 sinfo->local_pm = sta->mesh->local_pm;
2429 sinfo->peer_pm = sta->mesh->peer_pm;
2430 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2431 sinfo->connected_to_gate = sta->mesh->connected_to_gate;
2435 sinfo->bss_param.flags = 0;
2436 if (sdata->vif.bss_conf.use_cts_prot)
2437 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2438 if (sdata->vif.bss_conf.use_short_preamble)
2439 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2440 if (sdata->vif.bss_conf.use_short_slot)
2441 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2442 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2443 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2445 sinfo->sta_flags.set = 0;
2446 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2447 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2448 BIT(NL80211_STA_FLAG_WME) |
2449 BIT(NL80211_STA_FLAG_MFP) |
2450 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2451 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2452 BIT(NL80211_STA_FLAG_TDLS_PEER);
2453 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2454 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2455 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2456 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2458 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2459 if (test_sta_flag(sta, WLAN_STA_MFP))
2460 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2461 if (test_sta_flag(sta, WLAN_STA_AUTH))
2462 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2463 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2464 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2465 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2466 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2468 thr = sta_get_expected_throughput(sta);
2471 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2472 sinfo->expected_throughput = thr;
2475 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2476 sta->status_stats.ack_signal_filled) {
2477 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2478 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2481 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2482 sta->status_stats.ack_signal_filled) {
2483 sinfo->avg_ack_signal =
2484 -(s8)ewma_avg_signal_read(
2485 &sta->status_stats.avg_ack_signal);
2487 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2490 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2491 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
2492 sinfo->airtime_link_metric =
2493 airtime_link_metric_get(local, sta);
2497 u32 sta_get_expected_throughput(struct sta_info *sta)
2499 struct ieee80211_sub_if_data *sdata = sta->sdata;
2500 struct ieee80211_local *local = sdata->local;
2501 struct rate_control_ref *ref = NULL;
2504 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2505 ref = local->rate_ctrl;
2507 /* check if the driver has a SW RC implementation */
2508 if (ref && ref->ops->get_expected_throughput)
2509 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2511 thr = drv_get_expected_throughput(local, sta);
2516 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2518 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2520 if (!sta->status_stats.last_ack ||
2521 time_after(stats->last_rx, sta->status_stats.last_ack))
2522 return stats->last_rx;
2523 return sta->status_stats.last_ack;
2526 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2528 if (!sta->sdata->local->ops->wake_tx_queue)
2531 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2532 sta->cparams.target = MS2TIME(50);
2533 sta->cparams.interval = MS2TIME(300);
2534 sta->cparams.ecn = false;
2536 sta->cparams.target = MS2TIME(20);
2537 sta->cparams.interval = MS2TIME(100);
2538 sta->cparams.ecn = true;
2542 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2545 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2547 sta_update_codel_params(sta, thr);