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) 2018-2021 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 lockdep_is_held(&local->sta_mtx)) {
236 if (sdata != sta->sdata)
249 * sta_info_free - free STA
251 * @local: pointer to the global information
252 * @sta: STA info to free
254 * This function must undo everything done by sta_info_alloc()
255 * that may happen before sta_info_insert(). It may only be
256 * called when sta_info_insert() has not been attempted (and
257 * if that fails, the station is freed anyway.)
259 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
262 * If we had used sta_info_pre_move_state() then we might not
263 * have gone through the state transitions down again, so do
264 * it here now (and warn if it's inserted).
266 * This will clear state such as fast TX/RX that may have been
267 * allocated during state transitions.
269 while (sta->sta_state > IEEE80211_STA_NONE) {
272 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
274 ret = sta_info_move_state(sta, sta->sta_state - 1);
275 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret))
280 rate_control_free_sta(sta);
282 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
285 kfree(to_txq_info(sta->sta.txq[0]));
286 kfree(rcu_dereference_raw(sta->sta.rates));
287 #ifdef CONFIG_MAC80211_MESH
290 free_percpu(sta->pcpu_rx_stats);
294 /* Caller must hold local->sta_mtx */
295 static int sta_info_hash_add(struct ieee80211_local *local,
296 struct sta_info *sta)
298 return rhltable_insert(&local->sta_hash, &sta->hash_node,
302 static void sta_deliver_ps_frames(struct work_struct *wk)
304 struct sta_info *sta;
306 sta = container_of(wk, struct sta_info, drv_deliver_wk);
312 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
313 ieee80211_sta_ps_deliver_wakeup(sta);
314 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
315 ieee80211_sta_ps_deliver_poll_response(sta);
316 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
317 ieee80211_sta_ps_deliver_uapsd(sta);
321 static int sta_prepare_rate_control(struct ieee80211_local *local,
322 struct sta_info *sta, gfp_t gfp)
324 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
327 sta->rate_ctrl = local->rate_ctrl;
328 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
330 if (!sta->rate_ctrl_priv)
336 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
337 const u8 *addr, gfp_t gfp)
339 struct ieee80211_local *local = sdata->local;
340 struct ieee80211_hw *hw = &local->hw;
341 struct sta_info *sta;
344 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
348 if (ieee80211_hw_check(hw, USES_RSS)) {
350 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
351 if (!sta->pcpu_rx_stats)
355 spin_lock_init(&sta->lock);
356 spin_lock_init(&sta->ps_lock);
357 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
358 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
359 mutex_init(&sta->ampdu_mlme.mtx);
360 #ifdef CONFIG_MAC80211_MESH
361 if (ieee80211_vif_is_mesh(&sdata->vif)) {
362 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
365 sta->mesh->plink_sta = sta;
366 spin_lock_init(&sta->mesh->plink_lock);
367 if (ieee80211_vif_is_mesh(&sdata->vif) &&
368 !sdata->u.mesh.user_mpm)
369 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
371 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
375 memcpy(sta->addr, addr, ETH_ALEN);
376 memcpy(sta->sta.addr, addr, ETH_ALEN);
377 sta->sta.max_rx_aggregation_subframes =
378 local->hw.max_rx_aggregation_subframes;
380 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
381 * The Tx path starts to use a key as soon as the key slot ptk_idx
382 * references to is not NULL. To not use the initial Rx-only key
383 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid
384 * which always will refer to a NULL key.
386 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
387 sta->ptk_idx = INVALID_PTK_KEYIDX;
391 sta->rx_stats.last_rx = jiffies;
393 u64_stats_init(&sta->rx_stats.syncp);
395 ieee80211_init_frag_cache(&sta->frags);
397 sta->sta_state = IEEE80211_STA_NONE;
399 /* Mark TID as unreserved */
400 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
402 sta->last_connected = ktime_get_seconds();
403 ewma_signal_init(&sta->rx_stats_avg.signal);
404 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
405 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
406 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
408 if (local->ops->wake_tx_queue) {
410 int size = sizeof(struct txq_info) +
411 ALIGN(hw->txq_data_size, sizeof(void *));
413 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
417 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
418 struct txq_info *txq = txq_data + i * size;
420 /* might not do anything for the bufferable MMPDU TXQ */
421 ieee80211_txq_init(sdata, sta, txq, i);
425 if (sta_prepare_rate_control(local, sta, gfp))
428 sta->airtime_weight = IEEE80211_DEFAULT_AIRTIME_WEIGHT;
430 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
431 skb_queue_head_init(&sta->ps_tx_buf[i]);
432 skb_queue_head_init(&sta->tx_filtered[i]);
433 sta->airtime[i].deficit = sta->airtime_weight;
434 atomic_set(&sta->airtime[i].aql_tx_pending, 0);
435 sta->airtime[i].aql_limit_low = local->aql_txq_limit_low[i];
436 sta->airtime[i].aql_limit_high = local->aql_txq_limit_high[i];
439 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
440 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
442 for (i = 0; i < NUM_NL80211_BANDS; i++) {
446 if (!hw->wiphy->bands[i])
450 case NL80211_BAND_2GHZ:
452 * We use both here, even if we cannot really know for
453 * sure the station will support both, but the only use
454 * for this is when we don't know anything yet and send
455 * management frames, and then we'll pick the lowest
456 * possible rate anyway.
457 * If we don't include _G here, we cannot find a rate
458 * in P2P, and thus trigger the WARN_ONCE() in rate.c
460 mandatory = IEEE80211_RATE_MANDATORY_B |
461 IEEE80211_RATE_MANDATORY_G;
463 case NL80211_BAND_5GHZ:
464 mandatory = IEEE80211_RATE_MANDATORY_A;
466 case NL80211_BAND_60GHZ:
472 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) {
473 struct ieee80211_rate *rate;
475 rate = &hw->wiphy->bands[i]->bitrates[r];
477 if (!(rate->flags & mandatory))
479 sta->sta.supp_rates[i] |= BIT(r);
483 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
484 if (sdata->vif.type == NL80211_IFTYPE_AP ||
485 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
486 struct ieee80211_supported_band *sband;
489 sband = ieee80211_get_sband(sdata);
493 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
494 IEEE80211_HT_CAP_SM_PS_SHIFT;
496 * Assume that hostapd advertises our caps in the beacon and
497 * this is the known_smps_mode for a station that just assciated
500 case WLAN_HT_SMPS_CONTROL_DISABLED:
501 sta->known_smps_mode = IEEE80211_SMPS_OFF;
503 case WLAN_HT_SMPS_CONTROL_STATIC:
504 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
506 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
507 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
514 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
516 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
517 sta->cparams.target = MS2TIME(20);
518 sta->cparams.interval = MS2TIME(100);
519 sta->cparams.ecn = true;
521 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
527 kfree(to_txq_info(sta->sta.txq[0]));
529 free_percpu(sta->pcpu_rx_stats);
530 #ifdef CONFIG_MAC80211_MESH
537 static int sta_info_insert_check(struct sta_info *sta)
539 struct ieee80211_sub_if_data *sdata = sta->sdata;
542 * Can't be a WARN_ON because it can be triggered through a race:
543 * something inserts a STA (on one CPU) without holding the RTNL
544 * and another CPU turns off the net device.
546 if (unlikely(!ieee80211_sdata_running(sdata)))
549 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
550 is_multicast_ether_addr(sta->sta.addr)))
553 /* The RCU read lock is required by rhashtable due to
554 * asynchronous resize/rehash. We also require the mutex
558 lockdep_assert_held(&sdata->local->sta_mtx);
559 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
560 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
569 static int sta_info_insert_drv_state(struct ieee80211_local *local,
570 struct ieee80211_sub_if_data *sdata,
571 struct sta_info *sta)
573 enum ieee80211_sta_state state;
576 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
577 err = drv_sta_state(local, sdata, sta, state, state + 1);
584 * Drivers using legacy sta_add/sta_remove callbacks only
585 * get uploaded set to true after sta_add is called.
587 if (!local->ops->sta_add)
588 sta->uploaded = true;
592 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
594 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
595 sta->sta.addr, state + 1, err);
599 /* unwind on error */
600 for (; state > IEEE80211_STA_NOTEXIST; state--)
601 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
607 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
609 struct ieee80211_local *local = sdata->local;
610 bool allow_p2p_go_ps = sdata->vif.p2p;
611 struct sta_info *sta;
614 list_for_each_entry_rcu(sta, &local->sta_list, list) {
615 if (sdata != sta->sdata ||
616 !test_sta_flag(sta, WLAN_STA_ASSOC))
618 if (!sta->sta.support_p2p_ps) {
619 allow_p2p_go_ps = false;
625 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
626 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
627 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
632 * should be called with sta_mtx locked
633 * this function replaces the mutex lock
636 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
638 struct ieee80211_local *local = sta->local;
639 struct ieee80211_sub_if_data *sdata = sta->sdata;
640 struct station_info *sinfo = NULL;
643 lockdep_assert_held(&local->sta_mtx);
645 /* check if STA exists already */
646 if (sta_info_get_bss(sdata, sta->sta.addr)) {
651 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
658 local->sta_generation++;
661 /* simplify things and don't accept BA sessions yet */
662 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
664 /* make the station visible */
665 err = sta_info_hash_add(local, sta);
669 list_add_tail_rcu(&sta->list, &local->sta_list);
672 err = sta_info_insert_drv_state(local, sdata, sta);
676 set_sta_flag(sta, WLAN_STA_INSERTED);
678 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
679 ieee80211_recalc_min_chandef(sta->sdata);
680 if (!sta->sta.support_p2p_ps)
681 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
684 /* accept BA sessions now */
685 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
687 ieee80211_sta_debugfs_add(sta);
688 rate_control_add_sta_debugfs(sta);
690 sinfo->generation = local->sta_generation;
691 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
694 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
696 /* move reference to rcu-protected */
698 mutex_unlock(&local->sta_mtx);
700 if (ieee80211_vif_is_mesh(&sdata->vif))
701 mesh_accept_plinks_update(sdata);
703 ieee80211_check_fast_xmit(sta);
707 sta_info_hash_del(local, sta);
708 list_del_rcu(&sta->list);
713 cleanup_single_sta(sta);
714 mutex_unlock(&local->sta_mtx);
720 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
722 struct ieee80211_local *local = sta->local;
727 mutex_lock(&local->sta_mtx);
729 err = sta_info_insert_check(sta);
731 sta_info_free(local, sta);
732 mutex_unlock(&local->sta_mtx);
737 return sta_info_insert_finish(sta);
740 int sta_info_insert(struct sta_info *sta)
742 int err = sta_info_insert_rcu(sta);
749 static inline void __bss_tim_set(u8 *tim, u16 id)
752 * This format has been mandated by the IEEE specifications,
753 * so this line may not be changed to use the __set_bit() format.
755 tim[id / 8] |= (1 << (id % 8));
758 static inline void __bss_tim_clear(u8 *tim, u16 id)
761 * This format has been mandated by the IEEE specifications,
762 * so this line may not be changed to use the __clear_bit() format.
764 tim[id / 8] &= ~(1 << (id % 8));
767 static inline bool __bss_tim_get(u8 *tim, u16 id)
770 * This format has been mandated by the IEEE specifications,
771 * so this line may not be changed to use the test_bit() format.
773 return tim[id / 8] & (1 << (id % 8));
776 static unsigned long ieee80211_tids_for_ac(int ac)
778 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
780 case IEEE80211_AC_VO:
781 return BIT(6) | BIT(7);
782 case IEEE80211_AC_VI:
783 return BIT(4) | BIT(5);
784 case IEEE80211_AC_BE:
785 return BIT(0) | BIT(3);
786 case IEEE80211_AC_BK:
787 return BIT(1) | BIT(2);
794 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
796 struct ieee80211_local *local = sta->local;
798 bool indicate_tim = false;
799 u8 ignore_for_tim = sta->sta.uapsd_queues;
801 u16 id = sta->sta.aid;
803 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
804 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
805 if (WARN_ON_ONCE(!sta->sdata->bss))
808 ps = &sta->sdata->bss->ps;
809 #ifdef CONFIG_MAC80211_MESH
810 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
811 ps = &sta->sdata->u.mesh.ps;
817 /* No need to do anything if the driver does all */
818 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
825 * If all ACs are delivery-enabled then we should build
826 * the TIM bit for all ACs anyway; if only some are then
827 * we ignore those and build the TIM bit using only the
830 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
834 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
836 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
839 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
842 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
843 !skb_queue_empty(&sta->ps_tx_buf[ac]);
847 tids = ieee80211_tids_for_ac(ac);
850 sta->driver_buffered_tids & tids;
852 sta->txq_buffered_tids & tids;
856 spin_lock_bh(&local->tim_lock);
858 if (indicate_tim == __bss_tim_get(ps->tim, id))
862 __bss_tim_set(ps->tim, id);
864 __bss_tim_clear(ps->tim, id);
866 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
867 local->tim_in_locked_section = true;
868 drv_set_tim(local, &sta->sta, indicate_tim);
869 local->tim_in_locked_section = false;
873 spin_unlock_bh(&local->tim_lock);
876 void sta_info_recalc_tim(struct sta_info *sta)
878 __sta_info_recalc_tim(sta, false);
881 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
883 struct ieee80211_tx_info *info;
889 info = IEEE80211_SKB_CB(skb);
891 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
892 timeout = (sta->listen_interval *
893 sta->sdata->vif.bss_conf.beacon_int *
895 if (timeout < STA_TX_BUFFER_EXPIRE)
896 timeout = STA_TX_BUFFER_EXPIRE;
897 return time_after(jiffies, info->control.jiffies + timeout);
901 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
902 struct sta_info *sta, int ac)
908 * First check for frames that should expire on the filtered
909 * queue. Frames here were rejected by the driver and are on
910 * a separate queue to avoid reordering with normal PS-buffered
911 * frames. They also aren't accounted for right now in the
912 * total_ps_buffered counter.
915 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
916 skb = skb_peek(&sta->tx_filtered[ac]);
917 if (sta_info_buffer_expired(sta, skb))
918 skb = __skb_dequeue(&sta->tx_filtered[ac]);
921 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
924 * Frames are queued in order, so if this one
925 * hasn't expired yet we can stop testing. If
926 * we actually reached the end of the queue we
927 * also need to stop, of course.
931 ieee80211_free_txskb(&local->hw, skb);
935 * Now also check the normal PS-buffered queue, this will
936 * only find something if the filtered queue was emptied
937 * since the filtered frames are all before the normal PS
941 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
942 skb = skb_peek(&sta->ps_tx_buf[ac]);
943 if (sta_info_buffer_expired(sta, skb))
944 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
947 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
950 * frames are queued in order, so if this one
951 * hasn't expired yet (or we reached the end of
952 * the queue) we can stop testing
957 local->total_ps_buffered--;
958 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
960 ieee80211_free_txskb(&local->hw, skb);
964 * Finally, recalculate the TIM bit for this station -- it might
965 * now be clear because the station was too slow to retrieve its
968 sta_info_recalc_tim(sta);
971 * Return whether there are any frames still buffered, this is
972 * used to check whether the cleanup timer still needs to run,
973 * if there are no frames we don't need to rearm the timer.
975 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
976 skb_queue_empty(&sta->tx_filtered[ac]));
979 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
980 struct sta_info *sta)
982 bool have_buffered = false;
985 /* This is only necessary for stations on BSS/MBSS interfaces */
986 if (!sta->sdata->bss &&
987 !ieee80211_vif_is_mesh(&sta->sdata->vif))
990 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
992 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
994 return have_buffered;
997 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
999 struct ieee80211_local *local;
1000 struct ieee80211_sub_if_data *sdata;
1011 lockdep_assert_held(&local->sta_mtx);
1014 * Before removing the station from the driver and
1015 * rate control, it might still start new aggregation
1016 * sessions -- block that to make sure the tear-down
1017 * will be sufficient.
1019 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1020 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
1023 * Before removing the station from the driver there might be pending
1024 * rx frames on RSS queues sent prior to the disassociation - wait for
1025 * all such frames to be processed.
1027 drv_sync_rx_queues(local, sta);
1029 ret = sta_info_hash_del(local, sta);
1034 * for TDLS peers, make sure to return to the base channel before
1037 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
1038 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
1039 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
1042 list_del_rcu(&sta->list);
1043 sta->removed = true;
1046 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
1048 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1049 rcu_access_pointer(sdata->u.vlan.sta) == sta)
1050 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
1055 static void __sta_info_destroy_part2(struct sta_info *sta)
1057 struct ieee80211_local *local = sta->local;
1058 struct ieee80211_sub_if_data *sdata = sta->sdata;
1059 struct station_info *sinfo;
1063 * NOTE: This assumes at least synchronize_net() was done
1064 * after _part1 and before _part2!
1068 lockdep_assert_held(&local->sta_mtx);
1070 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1071 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1075 /* now keys can no longer be reached */
1076 ieee80211_free_sta_keys(local, sta);
1078 /* disable TIM bit - last chance to tell driver */
1079 __sta_info_recalc_tim(sta, true);
1084 local->sta_generation++;
1086 while (sta->sta_state > IEEE80211_STA_NONE) {
1087 ret = sta_info_move_state(sta, sta->sta_state - 1);
1094 if (sta->uploaded) {
1095 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1096 IEEE80211_STA_NOTEXIST);
1097 WARN_ON_ONCE(ret != 0);
1100 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1102 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1104 sta_set_sinfo(sta, sinfo, true);
1105 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1108 ieee80211_sta_debugfs_remove(sta);
1110 ieee80211_destroy_frag_cache(&sta->frags);
1112 cleanup_single_sta(sta);
1115 int __must_check __sta_info_destroy(struct sta_info *sta)
1117 int err = __sta_info_destroy_part1(sta);
1124 __sta_info_destroy_part2(sta);
1129 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1131 struct sta_info *sta;
1134 mutex_lock(&sdata->local->sta_mtx);
1135 sta = sta_info_get(sdata, addr);
1136 ret = __sta_info_destroy(sta);
1137 mutex_unlock(&sdata->local->sta_mtx);
1142 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1145 struct sta_info *sta;
1148 mutex_lock(&sdata->local->sta_mtx);
1149 sta = sta_info_get_bss(sdata, addr);
1150 ret = __sta_info_destroy(sta);
1151 mutex_unlock(&sdata->local->sta_mtx);
1156 static void sta_info_cleanup(struct timer_list *t)
1158 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1159 struct sta_info *sta;
1160 bool timer_needed = false;
1163 list_for_each_entry_rcu(sta, &local->sta_list, list)
1164 if (sta_info_cleanup_expire_buffered(local, sta))
1165 timer_needed = true;
1168 if (local->quiescing)
1174 mod_timer(&local->sta_cleanup,
1175 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1178 int sta_info_init(struct ieee80211_local *local)
1182 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1186 spin_lock_init(&local->tim_lock);
1187 mutex_init(&local->sta_mtx);
1188 INIT_LIST_HEAD(&local->sta_list);
1190 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1194 void sta_info_stop(struct ieee80211_local *local)
1196 del_timer_sync(&local->sta_cleanup);
1197 rhltable_destroy(&local->sta_hash);
1201 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1203 struct ieee80211_local *local = sdata->local;
1204 struct sta_info *sta, *tmp;
1205 LIST_HEAD(free_list);
1210 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1211 WARN_ON(vlans && !sdata->bss);
1213 mutex_lock(&local->sta_mtx);
1214 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1215 if (sdata == sta->sdata ||
1216 (vlans && sdata->bss == sta->sdata->bss)) {
1217 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1218 list_add(&sta->free_list, &free_list);
1223 if (!list_empty(&free_list)) {
1225 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1226 __sta_info_destroy_part2(sta);
1228 mutex_unlock(&local->sta_mtx);
1233 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1234 unsigned long exp_time)
1236 struct ieee80211_local *local = sdata->local;
1237 struct sta_info *sta, *tmp;
1239 mutex_lock(&local->sta_mtx);
1241 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1242 unsigned long last_active = ieee80211_sta_last_active(sta);
1244 if (sdata != sta->sdata)
1247 if (time_is_before_jiffies(last_active + exp_time)) {
1248 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1251 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1252 test_sta_flag(sta, WLAN_STA_PS_STA))
1253 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1255 WARN_ON(__sta_info_destroy(sta));
1259 mutex_unlock(&local->sta_mtx);
1262 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1264 const u8 *localaddr)
1266 struct ieee80211_local *local = hw_to_local(hw);
1267 struct rhlist_head *tmp;
1268 struct sta_info *sta;
1271 * Just return a random station if localaddr is NULL
1272 * ... first in list.
1274 for_each_sta_info(local, addr, sta, tmp) {
1276 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1285 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1287 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1290 struct sta_info *sta;
1295 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1304 EXPORT_SYMBOL(ieee80211_find_sta);
1306 /* powersave support code */
1307 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1309 struct ieee80211_sub_if_data *sdata = sta->sdata;
1310 struct ieee80211_local *local = sdata->local;
1311 struct sk_buff_head pending;
1312 int filtered = 0, buffered = 0, ac, i;
1313 unsigned long flags;
1316 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1317 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1320 if (sdata->vif.type == NL80211_IFTYPE_AP)
1321 ps = &sdata->bss->ps;
1322 else if (ieee80211_vif_is_mesh(&sdata->vif))
1323 ps = &sdata->u.mesh.ps;
1327 clear_sta_flag(sta, WLAN_STA_SP);
1329 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1330 sta->driver_buffered_tids = 0;
1331 sta->txq_buffered_tids = 0;
1333 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1334 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1336 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1337 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
1340 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i]));
1343 skb_queue_head_init(&pending);
1345 /* sync with ieee80211_tx_h_unicast_ps_buf */
1346 spin_lock(&sta->ps_lock);
1347 /* Send all buffered frames to the station */
1348 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1349 int count = skb_queue_len(&pending), tmp;
1351 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1352 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1353 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1354 tmp = skb_queue_len(&pending);
1355 filtered += tmp - count;
1358 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1359 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1360 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1361 tmp = skb_queue_len(&pending);
1362 buffered += tmp - count;
1365 ieee80211_add_pending_skbs(local, &pending);
1367 /* now we're no longer in the deliver code */
1368 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1370 /* The station might have polled and then woken up before we responded,
1371 * so clear these flags now to avoid them sticking around.
1373 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1374 clear_sta_flag(sta, WLAN_STA_UAPSD);
1375 spin_unlock(&sta->ps_lock);
1377 atomic_dec(&ps->num_sta_ps);
1379 local->total_ps_buffered -= buffered;
1381 sta_info_recalc_tim(sta);
1384 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1385 sta->sta.addr, sta->sta.aid, filtered, buffered);
1387 ieee80211_check_fast_xmit(sta);
1390 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1391 enum ieee80211_frame_release_type reason,
1392 bool call_driver, bool more_data)
1394 struct ieee80211_sub_if_data *sdata = sta->sdata;
1395 struct ieee80211_local *local = sdata->local;
1396 struct ieee80211_qos_hdr *nullfunc;
1397 struct sk_buff *skb;
1398 int size = sizeof(*nullfunc);
1400 bool qos = sta->sta.wme;
1401 struct ieee80211_tx_info *info;
1402 struct ieee80211_chanctx_conf *chanctx_conf;
1405 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1406 IEEE80211_STYPE_QOS_NULLFUNC |
1407 IEEE80211_FCTL_FROMDS);
1410 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1411 IEEE80211_STYPE_NULLFUNC |
1412 IEEE80211_FCTL_FROMDS);
1415 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1419 skb_reserve(skb, local->hw.extra_tx_headroom);
1421 nullfunc = skb_put(skb, size);
1422 nullfunc->frame_control = fc;
1423 nullfunc->duration_id = 0;
1424 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1425 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1426 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1427 nullfunc->seq_ctrl = 0;
1429 skb->priority = tid;
1430 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1432 nullfunc->qos_ctrl = cpu_to_le16(tid);
1434 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1435 nullfunc->qos_ctrl |=
1436 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1438 nullfunc->frame_control |=
1439 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1443 info = IEEE80211_SKB_CB(skb);
1446 * Tell TX path to send this frame even though the
1447 * STA may still remain is PS mode after this frame
1448 * exchange. Also set EOSP to indicate this packet
1449 * ends the poll/service period.
1451 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1452 IEEE80211_TX_STATUS_EOSP |
1453 IEEE80211_TX_CTL_REQ_TX_STATUS;
1455 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1458 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1461 skb->dev = sdata->dev;
1464 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1465 if (WARN_ON(!chanctx_conf)) {
1471 info->band = chanctx_conf->def.chan->band;
1472 ieee80211_xmit(sdata, sta, skb);
1476 static int find_highest_prio_tid(unsigned long tids)
1478 /* lower 3 TIDs aren't ordered perfectly */
1480 return fls(tids) - 1;
1481 /* TID 0 is BE just like TID 3 */
1484 return fls(tids) - 1;
1487 /* Indicates if the MORE_DATA bit should be set in the last
1488 * frame obtained by ieee80211_sta_ps_get_frames.
1489 * Note that driver_release_tids is relevant only if
1490 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1493 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1494 enum ieee80211_frame_release_type reason,
1495 unsigned long driver_release_tids)
1499 /* If the driver has data on more than one TID then
1500 * certainly there's more data if we release just a
1501 * single frame now (from a single TID). This will
1502 * only happen for PS-Poll.
1504 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1505 hweight16(driver_release_tids) > 1)
1508 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1509 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1512 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1513 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1521 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1522 enum ieee80211_frame_release_type reason,
1523 struct sk_buff_head *frames,
1524 unsigned long *driver_release_tids)
1526 struct ieee80211_sub_if_data *sdata = sta->sdata;
1527 struct ieee80211_local *local = sdata->local;
1530 /* Get response frame(s) and more data bit for the last one. */
1531 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1534 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1537 tids = ieee80211_tids_for_ac(ac);
1539 /* if we already have frames from software, then we can't also
1540 * release from hardware queues
1542 if (skb_queue_empty(frames)) {
1543 *driver_release_tids |=
1544 sta->driver_buffered_tids & tids;
1545 *driver_release_tids |= sta->txq_buffered_tids & tids;
1548 if (!*driver_release_tids) {
1549 struct sk_buff *skb;
1551 while (n_frames > 0) {
1552 skb = skb_dequeue(&sta->tx_filtered[ac]);
1555 &sta->ps_tx_buf[ac]);
1557 local->total_ps_buffered--;
1562 __skb_queue_tail(frames, skb);
1566 /* If we have more frames buffered on this AC, then abort the
1567 * loop since we can't send more data from other ACs before
1568 * the buffered frames from this.
1570 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1571 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1577 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1578 int n_frames, u8 ignored_acs,
1579 enum ieee80211_frame_release_type reason)
1581 struct ieee80211_sub_if_data *sdata = sta->sdata;
1582 struct ieee80211_local *local = sdata->local;
1583 unsigned long driver_release_tids = 0;
1584 struct sk_buff_head frames;
1587 /* Service or PS-Poll period starts */
1588 set_sta_flag(sta, WLAN_STA_SP);
1590 __skb_queue_head_init(&frames);
1592 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1593 &frames, &driver_release_tids);
1595 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1597 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1598 driver_release_tids =
1599 BIT(find_highest_prio_tid(driver_release_tids));
1601 if (skb_queue_empty(&frames) && !driver_release_tids) {
1605 * For PS-Poll, this can only happen due to a race condition
1606 * when we set the TIM bit and the station notices it, but
1607 * before it can poll for the frame we expire it.
1609 * For uAPSD, this is said in the standard (11.2.1.5 h):
1610 * At each unscheduled SP for a non-AP STA, the AP shall
1611 * attempt to transmit at least one MSDU or MMPDU, but no
1612 * more than the value specified in the Max SP Length field
1613 * in the QoS Capability element from delivery-enabled ACs,
1614 * that are destined for the non-AP STA.
1616 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1619 /* This will evaluate to 1, 3, 5 or 7. */
1620 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1621 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1625 ieee80211_send_null_response(sta, tid, reason, true, false);
1626 } else if (!driver_release_tids) {
1627 struct sk_buff_head pending;
1628 struct sk_buff *skb;
1631 bool need_null = false;
1633 skb_queue_head_init(&pending);
1635 while ((skb = __skb_dequeue(&frames))) {
1636 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1637 struct ieee80211_hdr *hdr = (void *) skb->data;
1643 * Tell TX path to send this frame even though the
1644 * STA may still remain is PS mode after this frame
1647 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1648 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1651 * Use MoreData flag to indicate whether there are
1652 * more buffered frames for this STA
1654 if (more_data || !skb_queue_empty(&frames))
1655 hdr->frame_control |=
1656 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1658 hdr->frame_control &=
1659 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1661 if (ieee80211_is_data_qos(hdr->frame_control) ||
1662 ieee80211_is_qos_nullfunc(hdr->frame_control))
1663 qoshdr = ieee80211_get_qos_ctl(hdr);
1665 tids |= BIT(skb->priority);
1667 __skb_queue_tail(&pending, skb);
1669 /* end service period after last frame or add one */
1670 if (!skb_queue_empty(&frames))
1673 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1674 /* for PS-Poll, there's only one frame */
1675 info->flags |= IEEE80211_TX_STATUS_EOSP |
1676 IEEE80211_TX_CTL_REQ_TX_STATUS;
1680 /* For uAPSD, things are a bit more complicated. If the
1681 * last frame has a QoS header (i.e. is a QoS-data or
1682 * QoS-nulldata frame) then just set the EOSP bit there
1684 * If the frame doesn't have a QoS header (which means
1685 * it should be a bufferable MMPDU) then we can't set
1686 * the EOSP bit in the QoS header; add a QoS-nulldata
1687 * frame to the list to send it after the MMPDU.
1689 * Note that this code is only in the mac80211-release
1690 * code path, we assume that the driver will not buffer
1691 * anything but QoS-data frames, or if it does, will
1692 * create the QoS-nulldata frame by itself if needed.
1694 * Cf. 802.11-2012 10.2.1.10 (c).
1697 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1699 info->flags |= IEEE80211_TX_STATUS_EOSP |
1700 IEEE80211_TX_CTL_REQ_TX_STATUS;
1702 /* The standard isn't completely clear on this
1703 * as it says the more-data bit should be set
1704 * if there are more BUs. The QoS-Null frame
1705 * we're about to send isn't buffered yet, we
1706 * only create it below, but let's pretend it
1707 * was buffered just in case some clients only
1708 * expect more-data=0 when eosp=1.
1710 hdr->frame_control |=
1711 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1718 drv_allow_buffered_frames(local, sta, tids, num,
1721 ieee80211_add_pending_skbs(local, &pending);
1724 ieee80211_send_null_response(
1725 sta, find_highest_prio_tid(tids),
1726 reason, false, false);
1728 sta_info_recalc_tim(sta);
1733 * We need to release a frame that is buffered somewhere in the
1734 * driver ... it'll have to handle that.
1735 * Note that the driver also has to check the number of frames
1736 * on the TIDs we're releasing from - if there are more than
1737 * n_frames it has to set the more-data bit (if we didn't ask
1738 * it to set it anyway due to other buffered frames); if there
1739 * are fewer than n_frames it has to make sure to adjust that
1740 * to allow the service period to end properly.
1742 drv_release_buffered_frames(local, sta, driver_release_tids,
1743 n_frames, reason, more_data);
1746 * Note that we don't recalculate the TIM bit here as it would
1747 * most likely have no effect at all unless the driver told us
1748 * that the TID(s) became empty before returning here from the
1750 * Either way, however, when the driver tells us that the TID(s)
1751 * became empty or we find that a txq became empty, we'll do the
1752 * TIM recalculation.
1755 if (!sta->sta.txq[0])
1758 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1759 if (!sta->sta.txq[tid] ||
1760 !(driver_release_tids & BIT(tid)) ||
1761 txq_has_queue(sta->sta.txq[tid]))
1764 sta_info_recalc_tim(sta);
1770 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1772 u8 ignore_for_response = sta->sta.uapsd_queues;
1775 * If all ACs are delivery-enabled then we should reply
1776 * from any of them, if only some are enabled we reply
1777 * only from the non-enabled ones.
1779 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1780 ignore_for_response = 0;
1782 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1783 IEEE80211_FRAME_RELEASE_PSPOLL);
1786 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1788 int n_frames = sta->sta.max_sp;
1789 u8 delivery_enabled = sta->sta.uapsd_queues;
1792 * If we ever grow support for TSPEC this might happen if
1793 * the TSPEC update from hostapd comes in between a trigger
1794 * frame setting WLAN_STA_UAPSD in the RX path and this
1795 * actually getting called.
1797 if (!delivery_enabled)
1800 switch (sta->sta.max_sp) {
1811 /* XXX: what is a good value? */
1816 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1817 IEEE80211_FRAME_RELEASE_UAPSD);
1820 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1821 struct ieee80211_sta *pubsta, bool block)
1823 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1825 trace_api_sta_block_awake(sta->local, pubsta, block);
1828 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1829 ieee80211_clear_fast_xmit(sta);
1833 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1836 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1837 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1838 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1839 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1840 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1841 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1842 /* must be asleep in this case */
1843 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1844 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1846 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1847 ieee80211_check_fast_xmit(sta);
1850 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1852 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1854 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1855 struct ieee80211_local *local = sta->local;
1857 trace_api_eosp(local, pubsta);
1859 clear_sta_flag(sta, WLAN_STA_SP);
1861 EXPORT_SYMBOL(ieee80211_sta_eosp);
1863 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1865 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1866 enum ieee80211_frame_release_type reason;
1869 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1871 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1872 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1875 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1877 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1879 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1880 u8 tid, bool buffered)
1882 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1884 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1887 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1890 set_bit(tid, &sta->driver_buffered_tids);
1892 clear_bit(tid, &sta->driver_buffered_tids);
1894 sta_info_recalc_tim(sta);
1896 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1898 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
1899 u32 tx_airtime, u32 rx_airtime)
1901 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1902 struct ieee80211_local *local = sta->sdata->local;
1903 u8 ac = ieee80211_ac_from_tid(tid);
1906 if (sta->local->airtime_flags & AIRTIME_USE_TX)
1907 airtime += tx_airtime;
1908 if (sta->local->airtime_flags & AIRTIME_USE_RX)
1909 airtime += rx_airtime;
1911 spin_lock_bh(&local->active_txq_lock[ac]);
1912 sta->airtime[ac].tx_airtime += tx_airtime;
1913 sta->airtime[ac].rx_airtime += rx_airtime;
1914 sta->airtime[ac].deficit -= airtime;
1915 spin_unlock_bh(&local->active_txq_lock[ac]);
1917 EXPORT_SYMBOL(ieee80211_sta_register_airtime);
1919 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
1920 struct sta_info *sta, u8 ac,
1921 u16 tx_airtime, bool tx_completed)
1925 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
1928 if (!tx_completed) {
1930 atomic_add(tx_airtime,
1931 &sta->airtime[ac].aql_tx_pending);
1933 atomic_add(tx_airtime, &local->aql_total_pending_airtime);
1938 tx_pending = atomic_sub_return(tx_airtime,
1939 &sta->airtime[ac].aql_tx_pending);
1941 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending,
1945 tx_pending = atomic_sub_return(tx_airtime,
1946 &local->aql_total_pending_airtime);
1947 if (WARN_ONCE(tx_pending < 0,
1948 "Device %s AC %d pending airtime underflow: %u, %u",
1949 wiphy_name(local->hw.wiphy), ac, tx_pending,
1951 atomic_cmpxchg(&local->aql_total_pending_airtime,
1955 int sta_info_move_state(struct sta_info *sta,
1956 enum ieee80211_sta_state new_state)
1960 if (sta->sta_state == new_state)
1963 /* check allowed transitions first */
1965 switch (new_state) {
1966 case IEEE80211_STA_NONE:
1967 if (sta->sta_state != IEEE80211_STA_AUTH)
1970 case IEEE80211_STA_AUTH:
1971 if (sta->sta_state != IEEE80211_STA_NONE &&
1972 sta->sta_state != IEEE80211_STA_ASSOC)
1975 case IEEE80211_STA_ASSOC:
1976 if (sta->sta_state != IEEE80211_STA_AUTH &&
1977 sta->sta_state != IEEE80211_STA_AUTHORIZED)
1980 case IEEE80211_STA_AUTHORIZED:
1981 if (sta->sta_state != IEEE80211_STA_ASSOC)
1985 WARN(1, "invalid state %d", new_state);
1989 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
1990 sta->sta.addr, new_state);
1993 * notify the driver before the actual changes so it can
1994 * fail the transition
1996 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
1997 int err = drv_sta_state(sta->local, sta->sdata, sta,
1998 sta->sta_state, new_state);
2003 /* reflect the change in all state variables */
2005 switch (new_state) {
2006 case IEEE80211_STA_NONE:
2007 if (sta->sta_state == IEEE80211_STA_AUTH)
2008 clear_bit(WLAN_STA_AUTH, &sta->_flags);
2010 case IEEE80211_STA_AUTH:
2011 if (sta->sta_state == IEEE80211_STA_NONE) {
2012 set_bit(WLAN_STA_AUTH, &sta->_flags);
2013 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
2014 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
2015 ieee80211_recalc_min_chandef(sta->sdata);
2016 if (!sta->sta.support_p2p_ps)
2017 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2020 case IEEE80211_STA_ASSOC:
2021 if (sta->sta_state == IEEE80211_STA_AUTH) {
2022 set_bit(WLAN_STA_ASSOC, &sta->_flags);
2023 sta->assoc_at = ktime_get_boottime_ns();
2024 ieee80211_recalc_min_chandef(sta->sdata);
2025 if (!sta->sta.support_p2p_ps)
2026 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2027 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
2028 ieee80211_vif_dec_num_mcast(sta->sdata);
2029 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2030 ieee80211_clear_fast_xmit(sta);
2031 ieee80211_clear_fast_rx(sta);
2034 case IEEE80211_STA_AUTHORIZED:
2035 if (sta->sta_state == IEEE80211_STA_ASSOC) {
2036 ieee80211_vif_inc_num_mcast(sta->sdata);
2037 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2038 ieee80211_check_fast_xmit(sta);
2039 ieee80211_check_fast_rx(sta);
2041 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2042 sta->sdata->vif.type == NL80211_IFTYPE_AP)
2043 cfg80211_send_layer2_update(sta->sdata->dev,
2050 sta->sta_state = new_state;
2055 u8 sta_info_tx_streams(struct sta_info *sta)
2057 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
2060 if (!sta->sta.ht_cap.ht_supported)
2063 if (sta->sta.vht_cap.vht_supported) {
2066 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
2068 for (i = 7; i >= 0; i--)
2069 if ((tx_mcs_map & (0x3 << (i * 2))) !=
2070 IEEE80211_VHT_MCS_NOT_SUPPORTED)
2074 if (ht_cap->mcs.rx_mask[3])
2076 else if (ht_cap->mcs.rx_mask[2])
2078 else if (ht_cap->mcs.rx_mask[1])
2083 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
2086 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2087 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
2090 static struct ieee80211_sta_rx_stats *
2091 sta_get_last_rx_stats(struct sta_info *sta)
2093 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
2096 if (!sta->pcpu_rx_stats)
2099 for_each_possible_cpu(cpu) {
2100 struct ieee80211_sta_rx_stats *cpustats;
2102 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2104 if (time_after(cpustats->last_rx, stats->last_rx))
2111 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2112 struct rate_info *rinfo)
2114 rinfo->bw = STA_STATS_GET(BW, rate);
2116 switch (STA_STATS_GET(TYPE, rate)) {
2117 case STA_STATS_RATE_TYPE_VHT:
2118 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2119 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2120 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2121 if (STA_STATS_GET(SGI, rate))
2122 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2124 case STA_STATS_RATE_TYPE_HT:
2125 rinfo->flags = RATE_INFO_FLAGS_MCS;
2126 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2127 if (STA_STATS_GET(SGI, rate))
2128 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2130 case STA_STATS_RATE_TYPE_LEGACY: {
2131 struct ieee80211_supported_band *sband;
2134 int band = STA_STATS_GET(LEGACY_BAND, rate);
2135 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2137 sband = local->hw.wiphy->bands[band];
2139 if (WARN_ON_ONCE(!sband->bitrates))
2142 brate = sband->bitrates[rate_idx].bitrate;
2143 if (rinfo->bw == RATE_INFO_BW_5)
2145 else if (rinfo->bw == RATE_INFO_BW_10)
2149 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2152 case STA_STATS_RATE_TYPE_HE:
2153 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2154 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2155 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2156 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2157 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2158 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2163 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2165 u32 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2167 if (rate == STA_STATS_RATE_INVALID)
2170 sta_stats_decode_rate(sta->local, rate, rinfo);
2174 static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats,
2181 start = u64_stats_fetch_begin_irq(&rxstats->syncp);
2182 value = rxstats->msdu[tid];
2183 } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start));
2188 static void sta_set_tidstats(struct sta_info *sta,
2189 struct cfg80211_tid_stats *tidstats,
2192 struct ieee80211_local *local = sta->local;
2195 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2196 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->rx_stats, tid);
2198 if (sta->pcpu_rx_stats) {
2199 for_each_possible_cpu(cpu) {
2200 struct ieee80211_sta_rx_stats *cpurxs;
2202 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2203 tidstats->rx_msdu +=
2204 sta_get_tidstats_msdu(cpurxs, tid);
2208 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2211 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2212 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2213 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2216 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2217 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2218 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2219 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2222 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2223 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2224 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2225 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2228 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2229 spin_lock_bh(&local->fq.lock);
2232 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2233 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2234 to_txq_info(sta->sta.txq[tid]));
2237 spin_unlock_bh(&local->fq.lock);
2241 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2247 start = u64_stats_fetch_begin_irq(&rxstats->syncp);
2248 value = rxstats->bytes;
2249 } while (u64_stats_fetch_retry_irq(&rxstats->syncp, start));
2254 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2257 struct ieee80211_sub_if_data *sdata = sta->sdata;
2258 struct ieee80211_local *local = sdata->local;
2261 struct ieee80211_sta_rx_stats *last_rxstats;
2263 last_rxstats = sta_get_last_rx_stats(sta);
2265 sinfo->generation = sdata->local->sta_generation;
2267 /* do before driver, so beacon filtering drivers have a
2268 * chance to e.g. just add the number of filtered beacons
2269 * (or just modify the value entirely, of course)
2271 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2272 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2274 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2275 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2276 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2277 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2278 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2279 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
2280 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2282 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2283 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2284 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2287 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2288 sinfo->assoc_at = sta->assoc_at;
2289 sinfo->inactive_time =
2290 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2292 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2293 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2294 sinfo->tx_bytes = 0;
2295 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2296 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2297 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2300 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2301 sinfo->tx_packets = 0;
2302 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2303 sinfo->tx_packets += sta->tx_stats.packets[ac];
2304 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2307 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2308 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2309 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2311 if (sta->pcpu_rx_stats) {
2312 for_each_possible_cpu(cpu) {
2313 struct ieee80211_sta_rx_stats *cpurxs;
2315 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2316 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2320 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2323 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2324 sinfo->rx_packets = sta->rx_stats.packets;
2325 if (sta->pcpu_rx_stats) {
2326 for_each_possible_cpu(cpu) {
2327 struct ieee80211_sta_rx_stats *cpurxs;
2329 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2330 sinfo->rx_packets += cpurxs->packets;
2333 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2336 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2337 sinfo->tx_retries = sta->status_stats.retry_count;
2338 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2341 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2342 sinfo->tx_failed = sta->status_stats.retry_failed;
2343 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2346 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
2347 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2348 sinfo->rx_duration += sta->airtime[ac].rx_airtime;
2349 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
2352 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
2353 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2354 sinfo->tx_duration += sta->airtime[ac].tx_airtime;
2355 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
2358 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
2359 sinfo->airtime_weight = sta->airtime_weight;
2360 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
2363 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2364 if (sta->pcpu_rx_stats) {
2365 for_each_possible_cpu(cpu) {
2366 struct ieee80211_sta_rx_stats *cpurxs;
2368 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2369 sinfo->rx_dropped_misc += cpurxs->dropped;
2373 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2374 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2375 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2376 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2377 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2380 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2381 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2382 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2383 sinfo->signal = (s8)last_rxstats->last_signal;
2384 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2387 if (!sta->pcpu_rx_stats &&
2388 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2390 -ewma_signal_read(&sta->rx_stats_avg.signal);
2391 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2395 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2396 * the sta->rx_stats struct, so the check here is fine with and without
2399 if (last_rxstats->chains &&
2400 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2401 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2402 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2403 if (!sta->pcpu_rx_stats)
2404 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2406 sinfo->chains = last_rxstats->chains;
2408 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2409 sinfo->chain_signal[i] =
2410 last_rxstats->chain_signal_last[i];
2411 sinfo->chain_signal_avg[i] =
2412 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2416 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2417 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2419 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2422 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2423 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2424 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2427 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2428 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
2429 sta_set_tidstats(sta, &sinfo->pertid[i], i);
2432 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2433 #ifdef CONFIG_MAC80211_MESH
2434 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2435 BIT_ULL(NL80211_STA_INFO_PLID) |
2436 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2437 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2438 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2439 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
2440 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) |
2441 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS);
2443 sinfo->llid = sta->mesh->llid;
2444 sinfo->plid = sta->mesh->plid;
2445 sinfo->plink_state = sta->mesh->plink_state;
2446 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2447 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2448 sinfo->t_offset = sta->mesh->t_offset;
2450 sinfo->local_pm = sta->mesh->local_pm;
2451 sinfo->peer_pm = sta->mesh->peer_pm;
2452 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2453 sinfo->connected_to_gate = sta->mesh->connected_to_gate;
2454 sinfo->connected_to_as = sta->mesh->connected_to_as;
2458 sinfo->bss_param.flags = 0;
2459 if (sdata->vif.bss_conf.use_cts_prot)
2460 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2461 if (sdata->vif.bss_conf.use_short_preamble)
2462 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2463 if (sdata->vif.bss_conf.use_short_slot)
2464 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2465 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2466 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2468 sinfo->sta_flags.set = 0;
2469 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2470 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2471 BIT(NL80211_STA_FLAG_WME) |
2472 BIT(NL80211_STA_FLAG_MFP) |
2473 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2474 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2475 BIT(NL80211_STA_FLAG_TDLS_PEER);
2476 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2477 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2478 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2479 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2481 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2482 if (test_sta_flag(sta, WLAN_STA_MFP))
2483 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2484 if (test_sta_flag(sta, WLAN_STA_AUTH))
2485 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2486 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2487 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2488 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2489 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2491 thr = sta_get_expected_throughput(sta);
2494 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2495 sinfo->expected_throughput = thr;
2498 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2499 sta->status_stats.ack_signal_filled) {
2500 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2501 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2504 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2505 sta->status_stats.ack_signal_filled) {
2506 sinfo->avg_ack_signal =
2507 -(s8)ewma_avg_signal_read(
2508 &sta->status_stats.avg_ack_signal);
2510 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2513 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2514 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
2515 sinfo->airtime_link_metric =
2516 airtime_link_metric_get(local, sta);
2520 u32 sta_get_expected_throughput(struct sta_info *sta)
2522 struct ieee80211_sub_if_data *sdata = sta->sdata;
2523 struct ieee80211_local *local = sdata->local;
2524 struct rate_control_ref *ref = NULL;
2527 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2528 ref = local->rate_ctrl;
2530 /* check if the driver has a SW RC implementation */
2531 if (ref && ref->ops->get_expected_throughput)
2532 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2534 thr = drv_get_expected_throughput(local, sta);
2539 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2541 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2543 if (!sta->status_stats.last_ack ||
2544 time_after(stats->last_rx, sta->status_stats.last_ack))
2545 return stats->last_rx;
2546 return sta->status_stats.last_ack;
2549 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2551 if (!sta->sdata->local->ops->wake_tx_queue)
2554 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2555 sta->cparams.target = MS2TIME(50);
2556 sta->cparams.interval = MS2TIME(300);
2557 sta->cparams.ecn = false;
2559 sta->cparams.target = MS2TIME(20);
2560 sta->cparams.interval = MS2TIME(100);
2561 sta->cparams.ecn = true;
2565 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2568 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2570 sta_update_codel_params(sta, thr);