2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/etherdevice.h>
15 #include <linux/netdevice.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/skbuff.h>
19 #include <linux/if_arp.h>
20 #include <linux/timer.h>
21 #include <linux/rtnetlink.h>
23 #include <net/codel.h>
24 #include <net/mac80211.h>
25 #include "ieee80211_i.h"
26 #include "driver-ops.h"
29 #include "debugfs_sta.h"
34 * DOC: STA information lifetime rules
36 * STA info structures (&struct sta_info) are managed in a hash table
37 * for faster lookup and a list for iteration. They are managed using
38 * RCU, i.e. access to the list and hash table is protected by RCU.
40 * Upon allocating a STA info structure with sta_info_alloc(), the caller
41 * owns that structure. It must then insert it into the hash table using
42 * either sta_info_insert() or sta_info_insert_rcu(); only in the latter
43 * case (which acquires an rcu read section but must not be called from
44 * within one) will the pointer still be valid after the call. Note that
45 * the caller may not do much with the STA info before inserting it, in
46 * particular, it may not start any mesh peer link management or add
49 * When the insertion fails (sta_info_insert()) returns non-zero), the
50 * structure will have been freed by sta_info_insert()!
52 * Station entries are added by mac80211 when you establish a link with a
53 * peer. This means different things for the different type of interfaces
54 * we support. For a regular station this mean we add the AP sta when we
55 * receive an association response from the AP. For IBSS this occurs when
56 * get to know about a peer on the same IBSS. For WDS we add the sta for
57 * the peer immediately upon device open. When using AP mode we add stations
58 * for each respective station upon request from userspace through nl80211.
60 * In order to remove a STA info structure, various sta_info_destroy_*()
61 * calls are available.
63 * There is no concept of ownership on a STA entry, each structure is
64 * owned by the global hash table/list until it is removed. All users of
65 * the structure need to be RCU protected so that the structure won't be
66 * freed before they are done using it.
69 static const struct rhashtable_params sta_rht_params
= {
70 .nelem_hint
= 3, /* start small */
71 .automatic_shrinking
= true,
72 .head_offset
= offsetof(struct sta_info
, hash_node
),
73 .key_offset
= offsetof(struct sta_info
, addr
),
75 .max_size
= CONFIG_MAC80211_STA_HASH_MAX_SIZE
,
78 /* Caller must hold local->sta_mtx */
79 static int sta_info_hash_del(struct ieee80211_local
*local
,
82 return rhltable_remove(&local
->sta_hash
, &sta
->hash_node
,
86 static void __cleanup_single_sta(struct sta_info
*sta
)
89 struct tid_ampdu_tx
*tid_tx
;
90 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
91 struct ieee80211_local
*local
= sdata
->local
;
92 struct fq
*fq
= &local
->fq
;
95 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
96 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
97 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
98 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
99 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
100 ps
= &sdata
->bss
->ps
;
101 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
102 ps
= &sdata
->u
.mesh
.ps
;
106 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
107 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
108 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
110 atomic_dec(&ps
->num_sta_ps
);
113 if (sta
->sta
.txq
[0]) {
114 for (i
= 0; i
< ARRAY_SIZE(sta
->sta
.txq
); i
++) {
115 struct txq_info
*txqi
= to_txq_info(sta
->sta
.txq
[i
]);
117 spin_lock_bh(&fq
->lock
);
118 ieee80211_txq_purge(local
, txqi
);
119 spin_unlock_bh(&fq
->lock
);
123 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
124 local
->total_ps_buffered
-= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
125 ieee80211_purge_tx_queue(&local
->hw
, &sta
->ps_tx_buf
[ac
]);
126 ieee80211_purge_tx_queue(&local
->hw
, &sta
->tx_filtered
[ac
]);
129 if (ieee80211_vif_is_mesh(&sdata
->vif
))
130 mesh_sta_cleanup(sta
);
132 cancel_work_sync(&sta
->drv_deliver_wk
);
135 * Destroy aggregation state here. It would be nice to wait for the
136 * driver to finish aggregation stop and then clean up, but for now
137 * drivers have to handle aggregation stop being requested, followed
138 * directly by station destruction.
140 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
141 kfree(sta
->ampdu_mlme
.tid_start_tx
[i
]);
142 tid_tx
= rcu_dereference_raw(sta
->ampdu_mlme
.tid_tx
[i
]);
145 ieee80211_purge_tx_queue(&local
->hw
, &tid_tx
->pending
);
150 static void cleanup_single_sta(struct sta_info
*sta
)
152 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
153 struct ieee80211_local
*local
= sdata
->local
;
155 __cleanup_single_sta(sta
);
156 sta_info_free(local
, sta
);
159 struct rhlist_head
*sta_info_hash_lookup(struct ieee80211_local
*local
,
162 return rhltable_lookup(&local
->sta_hash
, addr
, sta_rht_params
);
165 /* protected by RCU */
166 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
169 struct ieee80211_local
*local
= sdata
->local
;
170 struct rhlist_head
*tmp
;
171 struct sta_info
*sta
;
174 for_each_sta_info(local
, addr
, sta
, tmp
) {
175 if (sta
->sdata
== sdata
) {
177 /* this is safe as the caller must already hold
178 * another rcu read section or the mutex
188 * Get sta info either from the specified interface
189 * or from one of its vlans
191 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
194 struct ieee80211_local
*local
= sdata
->local
;
195 struct rhlist_head
*tmp
;
196 struct sta_info
*sta
;
199 for_each_sta_info(local
, addr
, sta
, tmp
) {
200 if (sta
->sdata
== sdata
||
201 (sta
->sdata
->bss
&& sta
->sdata
->bss
== sdata
->bss
)) {
203 /* this is safe as the caller must already hold
204 * another rcu read section or the mutex
213 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
216 struct ieee80211_local
*local
= sdata
->local
;
217 struct sta_info
*sta
;
220 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
221 if (sdata
!= sta
->sdata
)
234 * sta_info_free - free STA
236 * @local: pointer to the global information
237 * @sta: STA info to free
239 * This function must undo everything done by sta_info_alloc()
240 * that may happen before sta_info_insert(). It may only be
241 * called when sta_info_insert() has not been attempted (and
242 * if that fails, the station is freed anyway.)
244 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
)
247 rate_control_free_sta(sta
);
249 sta_dbg(sta
->sdata
, "Destroyed STA %pM\n", sta
->sta
.addr
);
252 kfree(to_txq_info(sta
->sta
.txq
[0]));
253 kfree(rcu_dereference_raw(sta
->sta
.rates
));
254 #ifdef CONFIG_MAC80211_MESH
257 free_percpu(sta
->pcpu_rx_stats
);
261 /* Caller must hold local->sta_mtx */
262 static int sta_info_hash_add(struct ieee80211_local
*local
,
263 struct sta_info
*sta
)
265 return rhltable_insert(&local
->sta_hash
, &sta
->hash_node
,
269 static void sta_deliver_ps_frames(struct work_struct
*wk
)
271 struct sta_info
*sta
;
273 sta
= container_of(wk
, struct sta_info
, drv_deliver_wk
);
279 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
))
280 ieee80211_sta_ps_deliver_wakeup(sta
);
281 else if (test_and_clear_sta_flag(sta
, WLAN_STA_PSPOLL
))
282 ieee80211_sta_ps_deliver_poll_response(sta
);
283 else if (test_and_clear_sta_flag(sta
, WLAN_STA_UAPSD
))
284 ieee80211_sta_ps_deliver_uapsd(sta
);
288 static int sta_prepare_rate_control(struct ieee80211_local
*local
,
289 struct sta_info
*sta
, gfp_t gfp
)
291 if (ieee80211_hw_check(&local
->hw
, HAS_RATE_CONTROL
))
294 sta
->rate_ctrl
= local
->rate_ctrl
;
295 sta
->rate_ctrl_priv
= rate_control_alloc_sta(sta
->rate_ctrl
,
297 if (!sta
->rate_ctrl_priv
)
303 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
304 const u8
*addr
, gfp_t gfp
)
306 struct ieee80211_local
*local
= sdata
->local
;
307 struct ieee80211_hw
*hw
= &local
->hw
;
308 struct sta_info
*sta
;
311 sta
= kzalloc(sizeof(*sta
) + hw
->sta_data_size
, gfp
);
315 if (ieee80211_hw_check(hw
, USES_RSS
)) {
317 alloc_percpu(struct ieee80211_sta_rx_stats
);
318 if (!sta
->pcpu_rx_stats
)
322 spin_lock_init(&sta
->lock
);
323 spin_lock_init(&sta
->ps_lock
);
324 INIT_WORK(&sta
->drv_deliver_wk
, sta_deliver_ps_frames
);
325 INIT_WORK(&sta
->ampdu_mlme
.work
, ieee80211_ba_session_work
);
326 mutex_init(&sta
->ampdu_mlme
.mtx
);
327 #ifdef CONFIG_MAC80211_MESH
328 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
329 sta
->mesh
= kzalloc(sizeof(*sta
->mesh
), gfp
);
332 sta
->mesh
->plink_sta
= sta
;
333 spin_lock_init(&sta
->mesh
->plink_lock
);
334 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
335 !sdata
->u
.mesh
.user_mpm
)
336 timer_setup(&sta
->mesh
->plink_timer
, mesh_plink_timer
,
338 sta
->mesh
->nonpeer_pm
= NL80211_MESH_POWER_ACTIVE
;
342 memcpy(sta
->addr
, addr
, ETH_ALEN
);
343 memcpy(sta
->sta
.addr
, addr
, ETH_ALEN
);
344 sta
->sta
.max_rx_aggregation_subframes
=
345 local
->hw
.max_rx_aggregation_subframes
;
349 sta
->rx_stats
.last_rx
= jiffies
;
351 u64_stats_init(&sta
->rx_stats
.syncp
);
353 sta
->sta_state
= IEEE80211_STA_NONE
;
355 /* Mark TID as unreserved */
356 sta
->reserved_tid
= IEEE80211_TID_UNRESERVED
;
358 sta
->last_connected
= ktime_get_seconds();
359 ewma_signal_init(&sta
->rx_stats_avg
.signal
);
360 for (i
= 0; i
< ARRAY_SIZE(sta
->rx_stats_avg
.chain_signal
); i
++)
361 ewma_signal_init(&sta
->rx_stats_avg
.chain_signal
[i
]);
363 if (local
->ops
->wake_tx_queue
) {
365 int size
= sizeof(struct txq_info
) +
366 ALIGN(hw
->txq_data_size
, sizeof(void *));
368 txq_data
= kcalloc(ARRAY_SIZE(sta
->sta
.txq
), size
, gfp
);
372 for (i
= 0; i
< ARRAY_SIZE(sta
->sta
.txq
); i
++) {
373 struct txq_info
*txq
= txq_data
+ i
* size
;
375 ieee80211_txq_init(sdata
, sta
, txq
, i
);
379 if (sta_prepare_rate_control(local
, sta
, gfp
))
382 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
384 * timer_to_tid must be initialized with identity mapping
385 * to enable session_timer's data differentiation. See
386 * sta_rx_agg_session_timer_expired for usage.
388 sta
->timer_to_tid
[i
] = i
;
390 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
391 skb_queue_head_init(&sta
->ps_tx_buf
[i
]);
392 skb_queue_head_init(&sta
->tx_filtered
[i
]);
395 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
396 sta
->last_seq_ctrl
[i
] = cpu_to_le16(USHRT_MAX
);
398 sta
->sta
.smps_mode
= IEEE80211_SMPS_OFF
;
399 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
400 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
401 struct ieee80211_supported_band
*sband
;
404 sband
= ieee80211_get_sband(sdata
);
408 smps
= (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >>
409 IEEE80211_HT_CAP_SM_PS_SHIFT
;
411 * Assume that hostapd advertises our caps in the beacon and
412 * this is the known_smps_mode for a station that just assciated
415 case WLAN_HT_SMPS_CONTROL_DISABLED
:
416 sta
->known_smps_mode
= IEEE80211_SMPS_OFF
;
418 case WLAN_HT_SMPS_CONTROL_STATIC
:
419 sta
->known_smps_mode
= IEEE80211_SMPS_STATIC
;
421 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
422 sta
->known_smps_mode
= IEEE80211_SMPS_DYNAMIC
;
429 sta
->sta
.max_rc_amsdu_len
= IEEE80211_MAX_MPDU_LEN_HT_BA
;
431 sta
->cparams
.ce_threshold
= CODEL_DISABLED_THRESHOLD
;
432 sta
->cparams
.target
= MS2TIME(20);
433 sta
->cparams
.interval
= MS2TIME(100);
434 sta
->cparams
.ecn
= true;
436 sta_dbg(sdata
, "Allocated STA %pM\n", sta
->sta
.addr
);
442 kfree(to_txq_info(sta
->sta
.txq
[0]));
444 #ifdef CONFIG_MAC80211_MESH
451 static int sta_info_insert_check(struct sta_info
*sta
)
453 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
456 * Can't be a WARN_ON because it can be triggered through a race:
457 * something inserts a STA (on one CPU) without holding the RTNL
458 * and another CPU turns off the net device.
460 if (unlikely(!ieee80211_sdata_running(sdata
)))
463 if (WARN_ON(ether_addr_equal(sta
->sta
.addr
, sdata
->vif
.addr
) ||
464 is_multicast_ether_addr(sta
->sta
.addr
)))
467 /* The RCU read lock is required by rhashtable due to
468 * asynchronous resize/rehash. We also require the mutex
472 lockdep_assert_held(&sdata
->local
->sta_mtx
);
473 if (ieee80211_hw_check(&sdata
->local
->hw
, NEEDS_UNIQUE_STA_ADDR
) &&
474 ieee80211_find_sta_by_ifaddr(&sdata
->local
->hw
, sta
->addr
, NULL
)) {
483 static int sta_info_insert_drv_state(struct ieee80211_local
*local
,
484 struct ieee80211_sub_if_data
*sdata
,
485 struct sta_info
*sta
)
487 enum ieee80211_sta_state state
;
490 for (state
= IEEE80211_STA_NOTEXIST
; state
< sta
->sta_state
; state
++) {
491 err
= drv_sta_state(local
, sdata
, sta
, state
, state
+ 1);
498 * Drivers using legacy sta_add/sta_remove callbacks only
499 * get uploaded set to true after sta_add is called.
501 if (!local
->ops
->sta_add
)
502 sta
->uploaded
= true;
506 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
508 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
509 sta
->sta
.addr
, state
+ 1, err
);
513 /* unwind on error */
514 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
515 WARN_ON(drv_sta_state(local
, sdata
, sta
, state
, state
- 1));
521 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data
*sdata
)
523 struct ieee80211_local
*local
= sdata
->local
;
524 bool allow_p2p_go_ps
= sdata
->vif
.p2p
;
525 struct sta_info
*sta
;
528 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
529 if (sdata
!= sta
->sdata
||
530 !test_sta_flag(sta
, WLAN_STA_ASSOC
))
532 if (!sta
->sta
.support_p2p_ps
) {
533 allow_p2p_go_ps
= false;
539 if (allow_p2p_go_ps
!= sdata
->vif
.bss_conf
.allow_p2p_go_ps
) {
540 sdata
->vif
.bss_conf
.allow_p2p_go_ps
= allow_p2p_go_ps
;
541 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_P2P_PS
);
546 * should be called with sta_mtx locked
547 * this function replaces the mutex lock
550 static int sta_info_insert_finish(struct sta_info
*sta
) __acquires(RCU
)
552 struct ieee80211_local
*local
= sta
->local
;
553 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
554 struct station_info
*sinfo
= NULL
;
557 lockdep_assert_held(&local
->sta_mtx
);
559 /* check if STA exists already */
560 if (sta_info_get_bss(sdata
, sta
->sta
.addr
)) {
565 sinfo
= kzalloc(sizeof(struct station_info
), GFP_KERNEL
);
572 local
->sta_generation
++;
575 /* simplify things and don't accept BA sessions yet */
576 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
578 /* make the station visible */
579 err
= sta_info_hash_add(local
, sta
);
583 list_add_tail_rcu(&sta
->list
, &local
->sta_list
);
586 err
= sta_info_insert_drv_state(local
, sdata
, sta
);
590 set_sta_flag(sta
, WLAN_STA_INSERTED
);
592 if (sta
->sta_state
>= IEEE80211_STA_ASSOC
) {
593 ieee80211_recalc_min_chandef(sta
->sdata
);
594 if (!sta
->sta
.support_p2p_ps
)
595 ieee80211_recalc_p2p_go_ps_allowed(sta
->sdata
);
598 /* accept BA sessions now */
599 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
601 ieee80211_sta_debugfs_add(sta
);
602 rate_control_add_sta_debugfs(sta
);
604 sinfo
->generation
= local
->sta_generation
;
605 cfg80211_new_sta(sdata
->dev
, sta
->sta
.addr
, sinfo
, GFP_KERNEL
);
608 sta_dbg(sdata
, "Inserted STA %pM\n", sta
->sta
.addr
);
610 /* move reference to rcu-protected */
612 mutex_unlock(&local
->sta_mtx
);
614 if (ieee80211_vif_is_mesh(&sdata
->vif
))
615 mesh_accept_plinks_update(sdata
);
619 sta_info_hash_del(local
, sta
);
620 list_del_rcu(&sta
->list
);
624 __cleanup_single_sta(sta
);
626 mutex_unlock(&local
->sta_mtx
);
632 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
)
634 struct ieee80211_local
*local
= sta
->local
;
639 mutex_lock(&local
->sta_mtx
);
641 err
= sta_info_insert_check(sta
);
643 mutex_unlock(&local
->sta_mtx
);
648 err
= sta_info_insert_finish(sta
);
654 sta_info_free(local
, sta
);
658 int sta_info_insert(struct sta_info
*sta
)
660 int err
= sta_info_insert_rcu(sta
);
667 static inline void __bss_tim_set(u8
*tim
, u16 id
)
670 * This format has been mandated by the IEEE specifications,
671 * so this line may not be changed to use the __set_bit() format.
673 tim
[id
/ 8] |= (1 << (id
% 8));
676 static inline void __bss_tim_clear(u8
*tim
, u16 id
)
679 * This format has been mandated by the IEEE specifications,
680 * so this line may not be changed to use the __clear_bit() format.
682 tim
[id
/ 8] &= ~(1 << (id
% 8));
685 static inline bool __bss_tim_get(u8
*tim
, u16 id
)
688 * This format has been mandated by the IEEE specifications,
689 * so this line may not be changed to use the test_bit() format.
691 return tim
[id
/ 8] & (1 << (id
% 8));
694 static unsigned long ieee80211_tids_for_ac(int ac
)
696 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
698 case IEEE80211_AC_VO
:
699 return BIT(6) | BIT(7);
700 case IEEE80211_AC_VI
:
701 return BIT(4) | BIT(5);
702 case IEEE80211_AC_BE
:
703 return BIT(0) | BIT(3);
704 case IEEE80211_AC_BK
:
705 return BIT(1) | BIT(2);
712 static void __sta_info_recalc_tim(struct sta_info
*sta
, bool ignore_pending
)
714 struct ieee80211_local
*local
= sta
->local
;
716 bool indicate_tim
= false;
717 u8 ignore_for_tim
= sta
->sta
.uapsd_queues
;
719 u16 id
= sta
->sta
.aid
;
721 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
722 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
723 if (WARN_ON_ONCE(!sta
->sdata
->bss
))
726 ps
= &sta
->sdata
->bss
->ps
;
727 #ifdef CONFIG_MAC80211_MESH
728 } else if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
)) {
729 ps
= &sta
->sdata
->u
.mesh
.ps
;
735 /* No need to do anything if the driver does all */
736 if (ieee80211_hw_check(&local
->hw
, AP_LINK_PS
) && !local
->ops
->set_tim
)
743 * If all ACs are delivery-enabled then we should build
744 * the TIM bit for all ACs anyway; if only some are then
745 * we ignore those and build the TIM bit using only the
748 if (ignore_for_tim
== BIT(IEEE80211_NUM_ACS
) - 1)
752 ignore_for_tim
= BIT(IEEE80211_NUM_ACS
) - 1;
754 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
757 if (ignore_for_tim
& ieee80211_ac_to_qos_mask
[ac
])
760 indicate_tim
|= !skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
761 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]);
765 tids
= ieee80211_tids_for_ac(ac
);
768 sta
->driver_buffered_tids
& tids
;
770 sta
->txq_buffered_tids
& tids
;
774 spin_lock_bh(&local
->tim_lock
);
776 if (indicate_tim
== __bss_tim_get(ps
->tim
, id
))
780 __bss_tim_set(ps
->tim
, id
);
782 __bss_tim_clear(ps
->tim
, id
);
784 if (local
->ops
->set_tim
&& !WARN_ON(sta
->dead
)) {
785 local
->tim_in_locked_section
= true;
786 drv_set_tim(local
, &sta
->sta
, indicate_tim
);
787 local
->tim_in_locked_section
= false;
791 spin_unlock_bh(&local
->tim_lock
);
794 void sta_info_recalc_tim(struct sta_info
*sta
)
796 __sta_info_recalc_tim(sta
, false);
799 static bool sta_info_buffer_expired(struct sta_info
*sta
, struct sk_buff
*skb
)
801 struct ieee80211_tx_info
*info
;
807 info
= IEEE80211_SKB_CB(skb
);
809 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
810 timeout
= (sta
->listen_interval
*
811 sta
->sdata
->vif
.bss_conf
.beacon_int
*
813 if (timeout
< STA_TX_BUFFER_EXPIRE
)
814 timeout
= STA_TX_BUFFER_EXPIRE
;
815 return time_after(jiffies
, info
->control
.jiffies
+ timeout
);
819 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local
*local
,
820 struct sta_info
*sta
, int ac
)
826 * First check for frames that should expire on the filtered
827 * queue. Frames here were rejected by the driver and are on
828 * a separate queue to avoid reordering with normal PS-buffered
829 * frames. They also aren't accounted for right now in the
830 * total_ps_buffered counter.
833 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
834 skb
= skb_peek(&sta
->tx_filtered
[ac
]);
835 if (sta_info_buffer_expired(sta
, skb
))
836 skb
= __skb_dequeue(&sta
->tx_filtered
[ac
]);
839 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
842 * Frames are queued in order, so if this one
843 * hasn't expired yet we can stop testing. If
844 * we actually reached the end of the queue we
845 * also need to stop, of course.
849 ieee80211_free_txskb(&local
->hw
, skb
);
853 * Now also check the normal PS-buffered queue, this will
854 * only find something if the filtered queue was emptied
855 * since the filtered frames are all before the normal PS
859 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
860 skb
= skb_peek(&sta
->ps_tx_buf
[ac
]);
861 if (sta_info_buffer_expired(sta
, skb
))
862 skb
= __skb_dequeue(&sta
->ps_tx_buf
[ac
]);
865 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
868 * frames are queued in order, so if this one
869 * hasn't expired yet (or we reached the end of
870 * the queue) we can stop testing
875 local
->total_ps_buffered
--;
876 ps_dbg(sta
->sdata
, "Buffered frame expired (STA %pM)\n",
878 ieee80211_free_txskb(&local
->hw
, skb
);
882 * Finally, recalculate the TIM bit for this station -- it might
883 * now be clear because the station was too slow to retrieve its
886 sta_info_recalc_tim(sta
);
889 * Return whether there are any frames still buffered, this is
890 * used to check whether the cleanup timer still needs to run,
891 * if there are no frames we don't need to rearm the timer.
893 return !(skb_queue_empty(&sta
->ps_tx_buf
[ac
]) &&
894 skb_queue_empty(&sta
->tx_filtered
[ac
]));
897 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local
*local
,
898 struct sta_info
*sta
)
900 bool have_buffered
= false;
903 /* This is only necessary for stations on BSS/MBSS interfaces */
904 if (!sta
->sdata
->bss
&&
905 !ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
908 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
910 sta_info_cleanup_expire_buffered_ac(local
, sta
, ac
);
912 return have_buffered
;
915 static int __must_check
__sta_info_destroy_part1(struct sta_info
*sta
)
917 struct ieee80211_local
*local
;
918 struct ieee80211_sub_if_data
*sdata
;
929 lockdep_assert_held(&local
->sta_mtx
);
932 * Before removing the station from the driver and
933 * rate control, it might still start new aggregation
934 * sessions -- block that to make sure the tear-down
935 * will be sufficient.
937 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
938 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
941 * Before removing the station from the driver there might be pending
942 * rx frames on RSS queues sent prior to the disassociation - wait for
943 * all such frames to be processed.
945 drv_sync_rx_queues(local
, sta
);
947 ret
= sta_info_hash_del(local
, sta
);
952 * for TDLS peers, make sure to return to the base channel before
955 if (test_sta_flag(sta
, WLAN_STA_TDLS_OFF_CHANNEL
)) {
956 drv_tdls_cancel_channel_switch(local
, sdata
, &sta
->sta
);
957 clear_sta_flag(sta
, WLAN_STA_TDLS_OFF_CHANNEL
);
960 list_del_rcu(&sta
->list
);
963 drv_sta_pre_rcu_remove(local
, sta
->sdata
, sta
);
965 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
966 rcu_access_pointer(sdata
->u
.vlan
.sta
) == sta
)
967 RCU_INIT_POINTER(sdata
->u
.vlan
.sta
, NULL
);
972 static void __sta_info_destroy_part2(struct sta_info
*sta
)
974 struct ieee80211_local
*local
= sta
->local
;
975 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
976 struct station_info
*sinfo
;
980 * NOTE: This assumes at least synchronize_net() was done
981 * after _part1 and before _part2!
985 lockdep_assert_held(&local
->sta_mtx
);
987 /* now keys can no longer be reached */
988 ieee80211_free_sta_keys(local
, sta
);
990 /* disable TIM bit - last chance to tell driver */
991 __sta_info_recalc_tim(sta
, true);
996 local
->sta_generation
++;
998 while (sta
->sta_state
> IEEE80211_STA_NONE
) {
999 ret
= sta_info_move_state(sta
, sta
->sta_state
- 1);
1006 if (sta
->uploaded
) {
1007 ret
= drv_sta_state(local
, sdata
, sta
, IEEE80211_STA_NONE
,
1008 IEEE80211_STA_NOTEXIST
);
1009 WARN_ON_ONCE(ret
!= 0);
1012 sta_dbg(sdata
, "Removed STA %pM\n", sta
->sta
.addr
);
1014 sinfo
= kzalloc(sizeof(*sinfo
), GFP_KERNEL
);
1016 sta_set_sinfo(sta
, sinfo
);
1017 cfg80211_del_sta_sinfo(sdata
->dev
, sta
->sta
.addr
, sinfo
, GFP_KERNEL
);
1020 rate_control_remove_sta_debugfs(sta
);
1021 ieee80211_sta_debugfs_remove(sta
);
1023 cleanup_single_sta(sta
);
1026 int __must_check
__sta_info_destroy(struct sta_info
*sta
)
1028 int err
= __sta_info_destroy_part1(sta
);
1035 __sta_info_destroy_part2(sta
);
1040 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
, const u8
*addr
)
1042 struct sta_info
*sta
;
1045 mutex_lock(&sdata
->local
->sta_mtx
);
1046 sta
= sta_info_get(sdata
, addr
);
1047 ret
= __sta_info_destroy(sta
);
1048 mutex_unlock(&sdata
->local
->sta_mtx
);
1053 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
1056 struct sta_info
*sta
;
1059 mutex_lock(&sdata
->local
->sta_mtx
);
1060 sta
= sta_info_get_bss(sdata
, addr
);
1061 ret
= __sta_info_destroy(sta
);
1062 mutex_unlock(&sdata
->local
->sta_mtx
);
1067 static void sta_info_cleanup(struct timer_list
*t
)
1069 struct ieee80211_local
*local
= from_timer(local
, t
, sta_cleanup
);
1070 struct sta_info
*sta
;
1071 bool timer_needed
= false;
1074 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
1075 if (sta_info_cleanup_expire_buffered(local
, sta
))
1076 timer_needed
= true;
1079 if (local
->quiescing
)
1085 mod_timer(&local
->sta_cleanup
,
1086 round_jiffies(jiffies
+ STA_INFO_CLEANUP_INTERVAL
));
1089 int sta_info_init(struct ieee80211_local
*local
)
1093 err
= rhltable_init(&local
->sta_hash
, &sta_rht_params
);
1097 spin_lock_init(&local
->tim_lock
);
1098 mutex_init(&local
->sta_mtx
);
1099 INIT_LIST_HEAD(&local
->sta_list
);
1101 timer_setup(&local
->sta_cleanup
, sta_info_cleanup
, 0);
1105 void sta_info_stop(struct ieee80211_local
*local
)
1107 del_timer_sync(&local
->sta_cleanup
);
1108 rhltable_destroy(&local
->sta_hash
);
1112 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
)
1114 struct ieee80211_local
*local
= sdata
->local
;
1115 struct sta_info
*sta
, *tmp
;
1116 LIST_HEAD(free_list
);
1121 WARN_ON(vlans
&& sdata
->vif
.type
!= NL80211_IFTYPE_AP
);
1122 WARN_ON(vlans
&& !sdata
->bss
);
1124 mutex_lock(&local
->sta_mtx
);
1125 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1126 if (sdata
== sta
->sdata
||
1127 (vlans
&& sdata
->bss
== sta
->sdata
->bss
)) {
1128 if (!WARN_ON(__sta_info_destroy_part1(sta
)))
1129 list_add(&sta
->free_list
, &free_list
);
1134 if (!list_empty(&free_list
)) {
1136 list_for_each_entry_safe(sta
, tmp
, &free_list
, free_list
)
1137 __sta_info_destroy_part2(sta
);
1139 mutex_unlock(&local
->sta_mtx
);
1144 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
1145 unsigned long exp_time
)
1147 struct ieee80211_local
*local
= sdata
->local
;
1148 struct sta_info
*sta
, *tmp
;
1150 mutex_lock(&local
->sta_mtx
);
1152 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1153 unsigned long last_active
= ieee80211_sta_last_active(sta
);
1155 if (sdata
!= sta
->sdata
)
1158 if (time_is_before_jiffies(last_active
+ exp_time
)) {
1159 sta_dbg(sta
->sdata
, "expiring inactive STA %pM\n",
1162 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1163 test_sta_flag(sta
, WLAN_STA_PS_STA
))
1164 atomic_dec(&sdata
->u
.mesh
.ps
.num_sta_ps
);
1166 WARN_ON(__sta_info_destroy(sta
));
1170 mutex_unlock(&local
->sta_mtx
);
1173 struct ieee80211_sta
*ieee80211_find_sta_by_ifaddr(struct ieee80211_hw
*hw
,
1175 const u8
*localaddr
)
1177 struct ieee80211_local
*local
= hw_to_local(hw
);
1178 struct rhlist_head
*tmp
;
1179 struct sta_info
*sta
;
1182 * Just return a random station if localaddr is NULL
1183 * ... first in list.
1185 for_each_sta_info(local
, addr
, sta
, tmp
) {
1187 !ether_addr_equal(sta
->sdata
->vif
.addr
, localaddr
))
1196 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr
);
1198 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_vif
*vif
,
1201 struct sta_info
*sta
;
1206 sta
= sta_info_get_bss(vif_to_sdata(vif
), addr
);
1215 EXPORT_SYMBOL(ieee80211_find_sta
);
1217 /* powersave support code */
1218 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
)
1220 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1221 struct ieee80211_local
*local
= sdata
->local
;
1222 struct sk_buff_head pending
;
1223 int filtered
= 0, buffered
= 0, ac
, i
;
1224 unsigned long flags
;
1227 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1228 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1231 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1232 ps
= &sdata
->bss
->ps
;
1233 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
1234 ps
= &sdata
->u
.mesh
.ps
;
1238 clear_sta_flag(sta
, WLAN_STA_SP
);
1240 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS
) > 1);
1241 sta
->driver_buffered_tids
= 0;
1242 sta
->txq_buffered_tids
= 0;
1244 if (!ieee80211_hw_check(&local
->hw
, AP_LINK_PS
))
1245 drv_sta_notify(local
, sdata
, STA_NOTIFY_AWAKE
, &sta
->sta
);
1247 if (sta
->sta
.txq
[0]) {
1248 for (i
= 0; i
< ARRAY_SIZE(sta
->sta
.txq
); i
++) {
1249 if (!txq_has_queue(sta
->sta
.txq
[i
]))
1252 drv_wake_tx_queue(local
, to_txq_info(sta
->sta
.txq
[i
]));
1256 skb_queue_head_init(&pending
);
1258 /* sync with ieee80211_tx_h_unicast_ps_buf */
1259 spin_lock(&sta
->ps_lock
);
1260 /* Send all buffered frames to the station */
1261 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1262 int count
= skb_queue_len(&pending
), tmp
;
1264 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
1265 skb_queue_splice_tail_init(&sta
->tx_filtered
[ac
], &pending
);
1266 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
1267 tmp
= skb_queue_len(&pending
);
1268 filtered
+= tmp
- count
;
1271 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1272 skb_queue_splice_tail_init(&sta
->ps_tx_buf
[ac
], &pending
);
1273 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1274 tmp
= skb_queue_len(&pending
);
1275 buffered
+= tmp
- count
;
1278 ieee80211_add_pending_skbs(local
, &pending
);
1280 /* now we're no longer in the deliver code */
1281 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1283 /* The station might have polled and then woken up before we responded,
1284 * so clear these flags now to avoid them sticking around.
1286 clear_sta_flag(sta
, WLAN_STA_PSPOLL
);
1287 clear_sta_flag(sta
, WLAN_STA_UAPSD
);
1288 spin_unlock(&sta
->ps_lock
);
1290 atomic_dec(&ps
->num_sta_ps
);
1292 /* This station just woke up and isn't aware of our SMPS state */
1293 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
1294 !ieee80211_smps_is_restrictive(sta
->known_smps_mode
,
1295 sdata
->smps_mode
) &&
1296 sta
->known_smps_mode
!= sdata
->bss
->req_smps
&&
1297 sta_info_tx_streams(sta
) != 1) {
1299 "%pM just woke up and MIMO capable - update SMPS\n",
1301 ieee80211_send_smps_action(sdata
, sdata
->bss
->req_smps
,
1303 sdata
->vif
.bss_conf
.bssid
);
1306 local
->total_ps_buffered
-= buffered
;
1308 sta_info_recalc_tim(sta
);
1311 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1312 sta
->sta
.addr
, sta
->sta
.aid
, filtered
, buffered
);
1314 ieee80211_check_fast_xmit(sta
);
1317 static void ieee80211_send_null_response(struct sta_info
*sta
, int tid
,
1318 enum ieee80211_frame_release_type reason
,
1319 bool call_driver
, bool more_data
)
1321 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1322 struct ieee80211_local
*local
= sdata
->local
;
1323 struct ieee80211_qos_hdr
*nullfunc
;
1324 struct sk_buff
*skb
;
1325 int size
= sizeof(*nullfunc
);
1327 bool qos
= sta
->sta
.wme
;
1328 struct ieee80211_tx_info
*info
;
1329 struct ieee80211_chanctx_conf
*chanctx_conf
;
1332 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1333 IEEE80211_STYPE_QOS_NULLFUNC
|
1334 IEEE80211_FCTL_FROMDS
);
1337 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1338 IEEE80211_STYPE_NULLFUNC
|
1339 IEEE80211_FCTL_FROMDS
);
1342 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ size
);
1346 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1348 nullfunc
= skb_put(skb
, size
);
1349 nullfunc
->frame_control
= fc
;
1350 nullfunc
->duration_id
= 0;
1351 memcpy(nullfunc
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
1352 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1353 memcpy(nullfunc
->addr3
, sdata
->vif
.addr
, ETH_ALEN
);
1354 nullfunc
->seq_ctrl
= 0;
1356 skb
->priority
= tid
;
1357 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[tid
]);
1359 nullfunc
->qos_ctrl
= cpu_to_le16(tid
);
1361 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
) {
1362 nullfunc
->qos_ctrl
|=
1363 cpu_to_le16(IEEE80211_QOS_CTL_EOSP
);
1365 nullfunc
->frame_control
|=
1366 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1370 info
= IEEE80211_SKB_CB(skb
);
1373 * Tell TX path to send this frame even though the
1374 * STA may still remain is PS mode after this frame
1375 * exchange. Also set EOSP to indicate this packet
1376 * ends the poll/service period.
1378 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1379 IEEE80211_TX_STATUS_EOSP
|
1380 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1382 info
->control
.flags
|= IEEE80211_TX_CTRL_PS_RESPONSE
;
1385 drv_allow_buffered_frames(local
, sta
, BIT(tid
), 1,
1388 skb
->dev
= sdata
->dev
;
1391 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1392 if (WARN_ON(!chanctx_conf
)) {
1398 info
->band
= chanctx_conf
->def
.chan
->band
;
1399 ieee80211_xmit(sdata
, sta
, skb
);
1403 static int find_highest_prio_tid(unsigned long tids
)
1405 /* lower 3 TIDs aren't ordered perfectly */
1407 return fls(tids
) - 1;
1408 /* TID 0 is BE just like TID 3 */
1411 return fls(tids
) - 1;
1414 /* Indicates if the MORE_DATA bit should be set in the last
1415 * frame obtained by ieee80211_sta_ps_get_frames.
1416 * Note that driver_release_tids is relevant only if
1417 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1420 ieee80211_sta_ps_more_data(struct sta_info
*sta
, u8 ignored_acs
,
1421 enum ieee80211_frame_release_type reason
,
1422 unsigned long driver_release_tids
)
1426 /* If the driver has data on more than one TID then
1427 * certainly there's more data if we release just a
1428 * single frame now (from a single TID). This will
1429 * only happen for PS-Poll.
1431 if (reason
== IEEE80211_FRAME_RELEASE_PSPOLL
&&
1432 hweight16(driver_release_tids
) > 1)
1435 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1436 if (ignored_acs
& ieee80211_ac_to_qos_mask
[ac
])
1439 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1440 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]))
1448 ieee80211_sta_ps_get_frames(struct sta_info
*sta
, int n_frames
, u8 ignored_acs
,
1449 enum ieee80211_frame_release_type reason
,
1450 struct sk_buff_head
*frames
,
1451 unsigned long *driver_release_tids
)
1453 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1454 struct ieee80211_local
*local
= sdata
->local
;
1457 /* Get response frame(s) and more data bit for the last one. */
1458 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1461 if (ignored_acs
& ieee80211_ac_to_qos_mask
[ac
])
1464 tids
= ieee80211_tids_for_ac(ac
);
1466 /* if we already have frames from software, then we can't also
1467 * release from hardware queues
1469 if (skb_queue_empty(frames
)) {
1470 *driver_release_tids
|=
1471 sta
->driver_buffered_tids
& tids
;
1472 *driver_release_tids
|= sta
->txq_buffered_tids
& tids
;
1475 if (!*driver_release_tids
) {
1476 struct sk_buff
*skb
;
1478 while (n_frames
> 0) {
1479 skb
= skb_dequeue(&sta
->tx_filtered
[ac
]);
1482 &sta
->ps_tx_buf
[ac
]);
1484 local
->total_ps_buffered
--;
1489 __skb_queue_tail(frames
, skb
);
1493 /* If we have more frames buffered on this AC, then abort the
1494 * loop since we can't send more data from other ACs before
1495 * the buffered frames from this.
1497 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1498 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]))
1504 ieee80211_sta_ps_deliver_response(struct sta_info
*sta
,
1505 int n_frames
, u8 ignored_acs
,
1506 enum ieee80211_frame_release_type reason
)
1508 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1509 struct ieee80211_local
*local
= sdata
->local
;
1510 unsigned long driver_release_tids
= 0;
1511 struct sk_buff_head frames
;
1514 /* Service or PS-Poll period starts */
1515 set_sta_flag(sta
, WLAN_STA_SP
);
1517 __skb_queue_head_init(&frames
);
1519 ieee80211_sta_ps_get_frames(sta
, n_frames
, ignored_acs
, reason
,
1520 &frames
, &driver_release_tids
);
1522 more_data
= ieee80211_sta_ps_more_data(sta
, ignored_acs
, reason
, driver_release_tids
);
1524 if (driver_release_tids
&& reason
== IEEE80211_FRAME_RELEASE_PSPOLL
)
1525 driver_release_tids
=
1526 BIT(find_highest_prio_tid(driver_release_tids
));
1528 if (skb_queue_empty(&frames
) && !driver_release_tids
) {
1532 * For PS-Poll, this can only happen due to a race condition
1533 * when we set the TIM bit and the station notices it, but
1534 * before it can poll for the frame we expire it.
1536 * For uAPSD, this is said in the standard (11.2.1.5 h):
1537 * At each unscheduled SP for a non-AP STA, the AP shall
1538 * attempt to transmit at least one MSDU or MMPDU, but no
1539 * more than the value specified in the Max SP Length field
1540 * in the QoS Capability element from delivery-enabled ACs,
1541 * that are destined for the non-AP STA.
1543 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1546 /* This will evaluate to 1, 3, 5 or 7. */
1547 for (ac
= IEEE80211_AC_VO
; ac
< IEEE80211_NUM_ACS
; ac
++)
1548 if (!(ignored_acs
& ieee80211_ac_to_qos_mask
[ac
]))
1552 ieee80211_send_null_response(sta
, tid
, reason
, true, false);
1553 } else if (!driver_release_tids
) {
1554 struct sk_buff_head pending
;
1555 struct sk_buff
*skb
;
1558 bool need_null
= false;
1560 skb_queue_head_init(&pending
);
1562 while ((skb
= __skb_dequeue(&frames
))) {
1563 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1564 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
1570 * Tell TX path to send this frame even though the
1571 * STA may still remain is PS mode after this frame
1574 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
;
1575 info
->control
.flags
|= IEEE80211_TX_CTRL_PS_RESPONSE
;
1578 * Use MoreData flag to indicate whether there are
1579 * more buffered frames for this STA
1581 if (more_data
|| !skb_queue_empty(&frames
))
1582 hdr
->frame_control
|=
1583 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1585 hdr
->frame_control
&=
1586 cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
1588 if (ieee80211_is_data_qos(hdr
->frame_control
) ||
1589 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1590 qoshdr
= ieee80211_get_qos_ctl(hdr
);
1592 tids
|= BIT(skb
->priority
);
1594 __skb_queue_tail(&pending
, skb
);
1596 /* end service period after last frame or add one */
1597 if (!skb_queue_empty(&frames
))
1600 if (reason
!= IEEE80211_FRAME_RELEASE_UAPSD
) {
1601 /* for PS-Poll, there's only one frame */
1602 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1603 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1607 /* For uAPSD, things are a bit more complicated. If the
1608 * last frame has a QoS header (i.e. is a QoS-data or
1609 * QoS-nulldata frame) then just set the EOSP bit there
1611 * If the frame doesn't have a QoS header (which means
1612 * it should be a bufferable MMPDU) then we can't set
1613 * the EOSP bit in the QoS header; add a QoS-nulldata
1614 * frame to the list to send it after the MMPDU.
1616 * Note that this code is only in the mac80211-release
1617 * code path, we assume that the driver will not buffer
1618 * anything but QoS-data frames, or if it does, will
1619 * create the QoS-nulldata frame by itself if needed.
1621 * Cf. 802.11-2012 10.2.1.10 (c).
1624 *qoshdr
|= IEEE80211_QOS_CTL_EOSP
;
1626 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1627 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1629 /* The standard isn't completely clear on this
1630 * as it says the more-data bit should be set
1631 * if there are more BUs. The QoS-Null frame
1632 * we're about to send isn't buffered yet, we
1633 * only create it below, but let's pretend it
1634 * was buffered just in case some clients only
1635 * expect more-data=0 when eosp=1.
1637 hdr
->frame_control
|=
1638 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1645 drv_allow_buffered_frames(local
, sta
, tids
, num
,
1648 ieee80211_add_pending_skbs(local
, &pending
);
1651 ieee80211_send_null_response(
1652 sta
, find_highest_prio_tid(tids
),
1653 reason
, false, false);
1655 sta_info_recalc_tim(sta
);
1660 * We need to release a frame that is buffered somewhere in the
1661 * driver ... it'll have to handle that.
1662 * Note that the driver also has to check the number of frames
1663 * on the TIDs we're releasing from - if there are more than
1664 * n_frames it has to set the more-data bit (if we didn't ask
1665 * it to set it anyway due to other buffered frames); if there
1666 * are fewer than n_frames it has to make sure to adjust that
1667 * to allow the service period to end properly.
1669 drv_release_buffered_frames(local
, sta
, driver_release_tids
,
1670 n_frames
, reason
, more_data
);
1673 * Note that we don't recalculate the TIM bit here as it would
1674 * most likely have no effect at all unless the driver told us
1675 * that the TID(s) became empty before returning here from the
1677 * Either way, however, when the driver tells us that the TID(s)
1678 * became empty or we find that a txq became empty, we'll do the
1679 * TIM recalculation.
1682 if (!sta
->sta
.txq
[0])
1685 for (tid
= 0; tid
< ARRAY_SIZE(sta
->sta
.txq
); tid
++) {
1686 if (!(driver_release_tids
& BIT(tid
)) ||
1687 txq_has_queue(sta
->sta
.txq
[tid
]))
1690 sta_info_recalc_tim(sta
);
1696 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
)
1698 u8 ignore_for_response
= sta
->sta
.uapsd_queues
;
1701 * If all ACs are delivery-enabled then we should reply
1702 * from any of them, if only some are enabled we reply
1703 * only from the non-enabled ones.
1705 if (ignore_for_response
== BIT(IEEE80211_NUM_ACS
) - 1)
1706 ignore_for_response
= 0;
1708 ieee80211_sta_ps_deliver_response(sta
, 1, ignore_for_response
,
1709 IEEE80211_FRAME_RELEASE_PSPOLL
);
1712 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
)
1714 int n_frames
= sta
->sta
.max_sp
;
1715 u8 delivery_enabled
= sta
->sta
.uapsd_queues
;
1718 * If we ever grow support for TSPEC this might happen if
1719 * the TSPEC update from hostapd comes in between a trigger
1720 * frame setting WLAN_STA_UAPSD in the RX path and this
1721 * actually getting called.
1723 if (!delivery_enabled
)
1726 switch (sta
->sta
.max_sp
) {
1737 /* XXX: what is a good value? */
1742 ieee80211_sta_ps_deliver_response(sta
, n_frames
, ~delivery_enabled
,
1743 IEEE80211_FRAME_RELEASE_UAPSD
);
1746 void ieee80211_sta_block_awake(struct ieee80211_hw
*hw
,
1747 struct ieee80211_sta
*pubsta
, bool block
)
1749 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1751 trace_api_sta_block_awake(sta
->local
, pubsta
, block
);
1754 set_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1755 ieee80211_clear_fast_xmit(sta
);
1759 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1762 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1763 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1764 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1765 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1766 } else if (test_sta_flag(sta
, WLAN_STA_PSPOLL
) ||
1767 test_sta_flag(sta
, WLAN_STA_UAPSD
)) {
1768 /* must be asleep in this case */
1769 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1770 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1772 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1773 ieee80211_check_fast_xmit(sta
);
1776 EXPORT_SYMBOL(ieee80211_sta_block_awake
);
1778 void ieee80211_sta_eosp(struct ieee80211_sta
*pubsta
)
1780 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1781 struct ieee80211_local
*local
= sta
->local
;
1783 trace_api_eosp(local
, pubsta
);
1785 clear_sta_flag(sta
, WLAN_STA_SP
);
1787 EXPORT_SYMBOL(ieee80211_sta_eosp
);
1789 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta
*pubsta
, int tid
)
1791 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1792 enum ieee80211_frame_release_type reason
;
1795 trace_api_send_eosp_nullfunc(sta
->local
, pubsta
, tid
);
1797 reason
= IEEE80211_FRAME_RELEASE_UAPSD
;
1798 more_data
= ieee80211_sta_ps_more_data(sta
, ~sta
->sta
.uapsd_queues
,
1801 ieee80211_send_null_response(sta
, tid
, reason
, false, more_data
);
1803 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc
);
1805 void ieee80211_sta_set_buffered(struct ieee80211_sta
*pubsta
,
1806 u8 tid
, bool buffered
)
1808 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1810 if (WARN_ON(tid
>= IEEE80211_NUM_TIDS
))
1813 trace_api_sta_set_buffered(sta
->local
, pubsta
, tid
, buffered
);
1816 set_bit(tid
, &sta
->driver_buffered_tids
);
1818 clear_bit(tid
, &sta
->driver_buffered_tids
);
1820 sta_info_recalc_tim(sta
);
1822 EXPORT_SYMBOL(ieee80211_sta_set_buffered
);
1824 int sta_info_move_state(struct sta_info
*sta
,
1825 enum ieee80211_sta_state new_state
)
1829 if (sta
->sta_state
== new_state
)
1832 /* check allowed transitions first */
1834 switch (new_state
) {
1835 case IEEE80211_STA_NONE
:
1836 if (sta
->sta_state
!= IEEE80211_STA_AUTH
)
1839 case IEEE80211_STA_AUTH
:
1840 if (sta
->sta_state
!= IEEE80211_STA_NONE
&&
1841 sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1844 case IEEE80211_STA_ASSOC
:
1845 if (sta
->sta_state
!= IEEE80211_STA_AUTH
&&
1846 sta
->sta_state
!= IEEE80211_STA_AUTHORIZED
)
1849 case IEEE80211_STA_AUTHORIZED
:
1850 if (sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1854 WARN(1, "invalid state %d", new_state
);
1858 sta_dbg(sta
->sdata
, "moving STA %pM to state %d\n",
1859 sta
->sta
.addr
, new_state
);
1862 * notify the driver before the actual changes so it can
1863 * fail the transition
1865 if (test_sta_flag(sta
, WLAN_STA_INSERTED
)) {
1866 int err
= drv_sta_state(sta
->local
, sta
->sdata
, sta
,
1867 sta
->sta_state
, new_state
);
1872 /* reflect the change in all state variables */
1874 switch (new_state
) {
1875 case IEEE80211_STA_NONE
:
1876 if (sta
->sta_state
== IEEE80211_STA_AUTH
)
1877 clear_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1879 case IEEE80211_STA_AUTH
:
1880 if (sta
->sta_state
== IEEE80211_STA_NONE
) {
1881 set_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1882 } else if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1883 clear_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1884 ieee80211_recalc_min_chandef(sta
->sdata
);
1885 if (!sta
->sta
.support_p2p_ps
)
1886 ieee80211_recalc_p2p_go_ps_allowed(sta
->sdata
);
1889 case IEEE80211_STA_ASSOC
:
1890 if (sta
->sta_state
== IEEE80211_STA_AUTH
) {
1891 set_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1892 ieee80211_recalc_min_chandef(sta
->sdata
);
1893 if (!sta
->sta
.support_p2p_ps
)
1894 ieee80211_recalc_p2p_go_ps_allowed(sta
->sdata
);
1895 } else if (sta
->sta_state
== IEEE80211_STA_AUTHORIZED
) {
1896 ieee80211_vif_dec_num_mcast(sta
->sdata
);
1897 clear_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1898 ieee80211_clear_fast_xmit(sta
);
1899 ieee80211_clear_fast_rx(sta
);
1902 case IEEE80211_STA_AUTHORIZED
:
1903 if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1904 ieee80211_vif_inc_num_mcast(sta
->sdata
);
1905 set_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1906 ieee80211_check_fast_xmit(sta
);
1907 ieee80211_check_fast_rx(sta
);
1914 sta
->sta_state
= new_state
;
1919 u8
sta_info_tx_streams(struct sta_info
*sta
)
1921 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->sta
.ht_cap
;
1924 if (!sta
->sta
.ht_cap
.ht_supported
)
1927 if (sta
->sta
.vht_cap
.vht_supported
) {
1930 le16_to_cpu(sta
->sta
.vht_cap
.vht_mcs
.tx_mcs_map
);
1932 for (i
= 7; i
>= 0; i
--)
1933 if ((tx_mcs_map
& (0x3 << (i
* 2))) !=
1934 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
1938 if (ht_cap
->mcs
.rx_mask
[3])
1940 else if (ht_cap
->mcs
.rx_mask
[2])
1942 else if (ht_cap
->mcs
.rx_mask
[1])
1947 if (!(ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_RX_DIFF
))
1950 return ((ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
)
1951 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
) + 1;
1954 static struct ieee80211_sta_rx_stats
*
1955 sta_get_last_rx_stats(struct sta_info
*sta
)
1957 struct ieee80211_sta_rx_stats
*stats
= &sta
->rx_stats
;
1958 struct ieee80211_local
*local
= sta
->local
;
1961 if (!ieee80211_hw_check(&local
->hw
, USES_RSS
))
1964 for_each_possible_cpu(cpu
) {
1965 struct ieee80211_sta_rx_stats
*cpustats
;
1967 cpustats
= per_cpu_ptr(sta
->pcpu_rx_stats
, cpu
);
1969 if (time_after(cpustats
->last_rx
, stats
->last_rx
))
1976 static void sta_stats_decode_rate(struct ieee80211_local
*local
, u16 rate
,
1977 struct rate_info
*rinfo
)
1979 rinfo
->bw
= STA_STATS_GET(BW
, rate
);
1981 switch (STA_STATS_GET(TYPE
, rate
)) {
1982 case STA_STATS_RATE_TYPE_VHT
:
1983 rinfo
->flags
= RATE_INFO_FLAGS_VHT_MCS
;
1984 rinfo
->mcs
= STA_STATS_GET(VHT_MCS
, rate
);
1985 rinfo
->nss
= STA_STATS_GET(VHT_NSS
, rate
);
1986 if (STA_STATS_GET(SGI
, rate
))
1987 rinfo
->flags
|= RATE_INFO_FLAGS_SHORT_GI
;
1989 case STA_STATS_RATE_TYPE_HT
:
1990 rinfo
->flags
= RATE_INFO_FLAGS_MCS
;
1991 rinfo
->mcs
= STA_STATS_GET(HT_MCS
, rate
);
1992 if (STA_STATS_GET(SGI
, rate
))
1993 rinfo
->flags
|= RATE_INFO_FLAGS_SHORT_GI
;
1995 case STA_STATS_RATE_TYPE_LEGACY
: {
1996 struct ieee80211_supported_band
*sband
;
1999 int band
= STA_STATS_GET(LEGACY_BAND
, rate
);
2000 int rate_idx
= STA_STATS_GET(LEGACY_IDX
, rate
);
2003 sband
= local
->hw
.wiphy
->bands
[band
];
2004 brate
= sband
->bitrates
[rate_idx
].bitrate
;
2005 if (rinfo
->bw
== RATE_INFO_BW_5
)
2007 else if (rinfo
->bw
== RATE_INFO_BW_10
)
2011 rinfo
->legacy
= DIV_ROUND_UP(brate
, 1 << shift
);
2017 static int sta_set_rate_info_rx(struct sta_info
*sta
, struct rate_info
*rinfo
)
2019 u16 rate
= READ_ONCE(sta_get_last_rx_stats(sta
)->last_rate
);
2021 if (rate
== STA_STATS_RATE_INVALID
)
2024 sta_stats_decode_rate(sta
->local
, rate
, rinfo
);
2028 static void sta_set_tidstats(struct sta_info
*sta
,
2029 struct cfg80211_tid_stats
*tidstats
,
2032 struct ieee80211_local
*local
= sta
->local
;
2034 if (!(tidstats
->filled
& BIT(NL80211_TID_STATS_RX_MSDU
))) {
2038 start
= u64_stats_fetch_begin(&sta
->rx_stats
.syncp
);
2039 tidstats
->rx_msdu
= sta
->rx_stats
.msdu
[tid
];
2040 } while (u64_stats_fetch_retry(&sta
->rx_stats
.syncp
, start
));
2042 tidstats
->filled
|= BIT(NL80211_TID_STATS_RX_MSDU
);
2045 if (!(tidstats
->filled
& BIT(NL80211_TID_STATS_TX_MSDU
))) {
2046 tidstats
->filled
|= BIT(NL80211_TID_STATS_TX_MSDU
);
2047 tidstats
->tx_msdu
= sta
->tx_stats
.msdu
[tid
];
2050 if (!(tidstats
->filled
& BIT(NL80211_TID_STATS_TX_MSDU_RETRIES
)) &&
2051 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2052 tidstats
->filled
|= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES
);
2053 tidstats
->tx_msdu_retries
= sta
->status_stats
.msdu_retries
[tid
];
2056 if (!(tidstats
->filled
& BIT(NL80211_TID_STATS_TX_MSDU_FAILED
)) &&
2057 ieee80211_hw_check(&local
->hw
, REPORTS_TX_ACK_STATUS
)) {
2058 tidstats
->filled
|= BIT(NL80211_TID_STATS_TX_MSDU_FAILED
);
2059 tidstats
->tx_msdu_failed
= sta
->status_stats
.msdu_failed
[tid
];
2063 static inline u64
sta_get_stats_bytes(struct ieee80211_sta_rx_stats
*rxstats
)
2069 start
= u64_stats_fetch_begin(&rxstats
->syncp
);
2070 value
= rxstats
->bytes
;
2071 } while (u64_stats_fetch_retry(&rxstats
->syncp
, start
));
2076 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
)
2078 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
2079 struct ieee80211_local
*local
= sdata
->local
;
2082 struct ieee80211_sta_rx_stats
*last_rxstats
;
2084 last_rxstats
= sta_get_last_rx_stats(sta
);
2086 sinfo
->generation
= sdata
->local
->sta_generation
;
2088 /* do before driver, so beacon filtering drivers have a
2089 * chance to e.g. just add the number of filtered beacons
2090 * (or just modify the value entirely, of course)
2092 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
2093 sinfo
->rx_beacon
= sdata
->u
.mgd
.count_beacon_signal
;
2095 drv_sta_statistics(local
, sdata
, &sta
->sta
, sinfo
);
2097 sinfo
->filled
|= BIT(NL80211_STA_INFO_INACTIVE_TIME
) |
2098 BIT(NL80211_STA_INFO_STA_FLAGS
) |
2099 BIT(NL80211_STA_INFO_BSS_PARAM
) |
2100 BIT(NL80211_STA_INFO_CONNECTED_TIME
) |
2101 BIT(NL80211_STA_INFO_RX_DROP_MISC
);
2103 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
2104 sinfo
->beacon_loss_count
= sdata
->u
.mgd
.beacon_loss_count
;
2105 sinfo
->filled
|= BIT(NL80211_STA_INFO_BEACON_LOSS
);
2108 sinfo
->connected_time
= ktime_get_seconds() - sta
->last_connected
;
2109 sinfo
->inactive_time
=
2110 jiffies_to_msecs(jiffies
- ieee80211_sta_last_active(sta
));
2112 if (!(sinfo
->filled
& (BIT(NL80211_STA_INFO_TX_BYTES64
) |
2113 BIT(NL80211_STA_INFO_TX_BYTES
)))) {
2114 sinfo
->tx_bytes
= 0;
2115 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
2116 sinfo
->tx_bytes
+= sta
->tx_stats
.bytes
[ac
];
2117 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_BYTES64
);
2120 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_PACKETS
))) {
2121 sinfo
->tx_packets
= 0;
2122 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
2123 sinfo
->tx_packets
+= sta
->tx_stats
.packets
[ac
];
2124 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_PACKETS
);
2127 if (!(sinfo
->filled
& (BIT(NL80211_STA_INFO_RX_BYTES64
) |
2128 BIT(NL80211_STA_INFO_RX_BYTES
)))) {
2129 sinfo
->rx_bytes
+= sta_get_stats_bytes(&sta
->rx_stats
);
2131 if (sta
->pcpu_rx_stats
) {
2132 for_each_possible_cpu(cpu
) {
2133 struct ieee80211_sta_rx_stats
*cpurxs
;
2135 cpurxs
= per_cpu_ptr(sta
->pcpu_rx_stats
, cpu
);
2136 sinfo
->rx_bytes
+= sta_get_stats_bytes(cpurxs
);
2140 sinfo
->filled
|= BIT(NL80211_STA_INFO_RX_BYTES64
);
2143 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_RX_PACKETS
))) {
2144 sinfo
->rx_packets
= sta
->rx_stats
.packets
;
2145 if (sta
->pcpu_rx_stats
) {
2146 for_each_possible_cpu(cpu
) {
2147 struct ieee80211_sta_rx_stats
*cpurxs
;
2149 cpurxs
= per_cpu_ptr(sta
->pcpu_rx_stats
, cpu
);
2150 sinfo
->rx_packets
+= cpurxs
->packets
;
2153 sinfo
->filled
|= BIT(NL80211_STA_INFO_RX_PACKETS
);
2156 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_RETRIES
))) {
2157 sinfo
->tx_retries
= sta
->status_stats
.retry_count
;
2158 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_RETRIES
);
2161 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_FAILED
))) {
2162 sinfo
->tx_failed
= sta
->status_stats
.retry_failed
;
2163 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_FAILED
);
2166 sinfo
->rx_dropped_misc
= sta
->rx_stats
.dropped
;
2167 if (sta
->pcpu_rx_stats
) {
2168 for_each_possible_cpu(cpu
) {
2169 struct ieee80211_sta_rx_stats
*cpurxs
;
2171 cpurxs
= per_cpu_ptr(sta
->pcpu_rx_stats
, cpu
);
2172 sinfo
->rx_dropped_misc
+= cpurxs
->dropped
;
2176 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
2177 !(sdata
->vif
.driver_flags
& IEEE80211_VIF_BEACON_FILTER
)) {
2178 sinfo
->filled
|= BIT(NL80211_STA_INFO_BEACON_RX
) |
2179 BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG
);
2180 sinfo
->rx_beacon_signal_avg
= ieee80211_ave_rssi(&sdata
->vif
);
2183 if (ieee80211_hw_check(&sta
->local
->hw
, SIGNAL_DBM
) ||
2184 ieee80211_hw_check(&sta
->local
->hw
, SIGNAL_UNSPEC
)) {
2185 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_SIGNAL
))) {
2186 sinfo
->signal
= (s8
)last_rxstats
->last_signal
;
2187 sinfo
->filled
|= BIT(NL80211_STA_INFO_SIGNAL
);
2190 if (!sta
->pcpu_rx_stats
&&
2191 !(sinfo
->filled
& BIT(NL80211_STA_INFO_SIGNAL_AVG
))) {
2193 -ewma_signal_read(&sta
->rx_stats_avg
.signal
);
2194 sinfo
->filled
|= BIT(NL80211_STA_INFO_SIGNAL_AVG
);
2198 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2199 * the sta->rx_stats struct, so the check here is fine with and without
2202 if (last_rxstats
->chains
&&
2203 !(sinfo
->filled
& (BIT(NL80211_STA_INFO_CHAIN_SIGNAL
) |
2204 BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG
)))) {
2205 sinfo
->filled
|= BIT(NL80211_STA_INFO_CHAIN_SIGNAL
);
2206 if (!sta
->pcpu_rx_stats
)
2207 sinfo
->filled
|= BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG
);
2209 sinfo
->chains
= last_rxstats
->chains
;
2211 for (i
= 0; i
< ARRAY_SIZE(sinfo
->chain_signal
); i
++) {
2212 sinfo
->chain_signal
[i
] =
2213 last_rxstats
->chain_signal_last
[i
];
2214 sinfo
->chain_signal_avg
[i
] =
2215 -ewma_signal_read(&sta
->rx_stats_avg
.chain_signal
[i
]);
2219 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_TX_BITRATE
))) {
2220 sta_set_rate_info_tx(sta
, &sta
->tx_stats
.last_rate
,
2222 sinfo
->filled
|= BIT(NL80211_STA_INFO_TX_BITRATE
);
2225 if (!(sinfo
->filled
& BIT(NL80211_STA_INFO_RX_BITRATE
))) {
2226 if (sta_set_rate_info_rx(sta
, &sinfo
->rxrate
) == 0)
2227 sinfo
->filled
|= BIT(NL80211_STA_INFO_RX_BITRATE
);
2230 sinfo
->filled
|= BIT(NL80211_STA_INFO_TID_STATS
);
2231 for (i
= 0; i
< IEEE80211_NUM_TIDS
+ 1; i
++) {
2232 struct cfg80211_tid_stats
*tidstats
= &sinfo
->pertid
[i
];
2234 sta_set_tidstats(sta
, tidstats
, i
);
2237 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
2238 #ifdef CONFIG_MAC80211_MESH
2239 sinfo
->filled
|= BIT(NL80211_STA_INFO_LLID
) |
2240 BIT(NL80211_STA_INFO_PLID
) |
2241 BIT(NL80211_STA_INFO_PLINK_STATE
) |
2242 BIT(NL80211_STA_INFO_LOCAL_PM
) |
2243 BIT(NL80211_STA_INFO_PEER_PM
) |
2244 BIT(NL80211_STA_INFO_NONPEER_PM
);
2246 sinfo
->llid
= sta
->mesh
->llid
;
2247 sinfo
->plid
= sta
->mesh
->plid
;
2248 sinfo
->plink_state
= sta
->mesh
->plink_state
;
2249 if (test_sta_flag(sta
, WLAN_STA_TOFFSET_KNOWN
)) {
2250 sinfo
->filled
|= BIT(NL80211_STA_INFO_T_OFFSET
);
2251 sinfo
->t_offset
= sta
->mesh
->t_offset
;
2253 sinfo
->local_pm
= sta
->mesh
->local_pm
;
2254 sinfo
->peer_pm
= sta
->mesh
->peer_pm
;
2255 sinfo
->nonpeer_pm
= sta
->mesh
->nonpeer_pm
;
2259 sinfo
->bss_param
.flags
= 0;
2260 if (sdata
->vif
.bss_conf
.use_cts_prot
)
2261 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_CTS_PROT
;
2262 if (sdata
->vif
.bss_conf
.use_short_preamble
)
2263 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_PREAMBLE
;
2264 if (sdata
->vif
.bss_conf
.use_short_slot
)
2265 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_SLOT_TIME
;
2266 sinfo
->bss_param
.dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
2267 sinfo
->bss_param
.beacon_interval
= sdata
->vif
.bss_conf
.beacon_int
;
2269 sinfo
->sta_flags
.set
= 0;
2270 sinfo
->sta_flags
.mask
= BIT(NL80211_STA_FLAG_AUTHORIZED
) |
2271 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
) |
2272 BIT(NL80211_STA_FLAG_WME
) |
2273 BIT(NL80211_STA_FLAG_MFP
) |
2274 BIT(NL80211_STA_FLAG_AUTHENTICATED
) |
2275 BIT(NL80211_STA_FLAG_ASSOCIATED
) |
2276 BIT(NL80211_STA_FLAG_TDLS_PEER
);
2277 if (test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
2278 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHORIZED
);
2279 if (test_sta_flag(sta
, WLAN_STA_SHORT_PREAMBLE
))
2280 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
);
2282 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_WME
);
2283 if (test_sta_flag(sta
, WLAN_STA_MFP
))
2284 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_MFP
);
2285 if (test_sta_flag(sta
, WLAN_STA_AUTH
))
2286 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHENTICATED
);
2287 if (test_sta_flag(sta
, WLAN_STA_ASSOC
))
2288 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_ASSOCIATED
);
2289 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
))
2290 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_TDLS_PEER
);
2292 thr
= sta_get_expected_throughput(sta
);
2295 sinfo
->filled
|= BIT(NL80211_STA_INFO_EXPECTED_THROUGHPUT
);
2296 sinfo
->expected_throughput
= thr
;
2300 u32
sta_get_expected_throughput(struct sta_info
*sta
)
2302 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
2303 struct ieee80211_local
*local
= sdata
->local
;
2304 struct rate_control_ref
*ref
= NULL
;
2307 if (test_sta_flag(sta
, WLAN_STA_RATE_CONTROL
))
2308 ref
= local
->rate_ctrl
;
2310 /* check if the driver has a SW RC implementation */
2311 if (ref
&& ref
->ops
->get_expected_throughput
)
2312 thr
= ref
->ops
->get_expected_throughput(sta
->rate_ctrl_priv
);
2314 thr
= drv_get_expected_throughput(local
, sta
);
2319 unsigned long ieee80211_sta_last_active(struct sta_info
*sta
)
2321 struct ieee80211_sta_rx_stats
*stats
= sta_get_last_rx_stats(sta
);
2323 if (time_after(stats
->last_rx
, sta
->status_stats
.last_ack
))
2324 return stats
->last_rx
;
2325 return sta
->status_stats
.last_ack
;
2328 static void sta_update_codel_params(struct sta_info
*sta
, u32 thr
)
2330 if (!sta
->sdata
->local
->ops
->wake_tx_queue
)
2333 if (thr
&& thr
< STA_SLOW_THRESHOLD
* sta
->local
->num_sta
) {
2334 sta
->cparams
.target
= MS2TIME(50);
2335 sta
->cparams
.interval
= MS2TIME(300);
2336 sta
->cparams
.ecn
= false;
2338 sta
->cparams
.target
= MS2TIME(20);
2339 sta
->cparams
.interval
= MS2TIME(100);
2340 sta
->cparams
.ecn
= true;
2344 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta
*pubsta
,
2347 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
2349 sta_update_codel_params(sta
, thr
);