2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/etherdevice.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/if_arp.h>
19 #include <linux/timer.h>
20 #include <linux/rtnetlink.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 /* Caller must hold local->sta_mtx */
68 static int sta_info_hash_del(struct ieee80211_local
*local
,
73 s
= rcu_dereference_protected(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
74 lockdep_is_held(&local
->sta_mtx
));
78 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)],
83 while (rcu_access_pointer(s
->hnext
) &&
84 rcu_access_pointer(s
->hnext
) != sta
)
85 s
= rcu_dereference_protected(s
->hnext
,
86 lockdep_is_held(&local
->sta_mtx
));
87 if (rcu_access_pointer(s
->hnext
)) {
88 rcu_assign_pointer(s
->hnext
, sta
->hnext
);
95 static void __cleanup_single_sta(struct sta_info
*sta
)
98 struct tid_ampdu_tx
*tid_tx
;
99 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
100 struct ieee80211_local
*local
= sdata
->local
;
103 if (test_sta_flag(sta
, WLAN_STA_PS_STA
) ||
104 test_sta_flag(sta
, WLAN_STA_PS_DRIVER
) ||
105 test_sta_flag(sta
, WLAN_STA_PS_DELIVER
)) {
106 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
107 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
108 ps
= &sdata
->bss
->ps
;
109 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
110 ps
= &sdata
->u
.mesh
.ps
;
114 clear_sta_flag(sta
, WLAN_STA_PS_STA
);
115 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
116 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
118 atomic_dec(&ps
->num_sta_ps
);
119 sta_info_recalc_tim(sta
);
122 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
123 local
->total_ps_buffered
-= skb_queue_len(&sta
->ps_tx_buf
[ac
]);
124 ieee80211_purge_tx_queue(&local
->hw
, &sta
->ps_tx_buf
[ac
]);
125 ieee80211_purge_tx_queue(&local
->hw
, &sta
->tx_filtered
[ac
]);
128 if (ieee80211_vif_is_mesh(&sdata
->vif
))
129 mesh_sta_cleanup(sta
);
131 cancel_work_sync(&sta
->drv_deliver_wk
);
134 * Destroy aggregation state here. It would be nice to wait for the
135 * driver to finish aggregation stop and then clean up, but for now
136 * drivers have to handle aggregation stop being requested, followed
137 * directly by station destruction.
139 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
140 kfree(sta
->ampdu_mlme
.tid_start_tx
[i
]);
141 tid_tx
= rcu_dereference_raw(sta
->ampdu_mlme
.tid_tx
[i
]);
144 ieee80211_purge_tx_queue(&local
->hw
, &tid_tx
->pending
);
149 static void cleanup_single_sta(struct sta_info
*sta
)
151 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
152 struct ieee80211_local
*local
= sdata
->local
;
154 __cleanup_single_sta(sta
);
155 sta_info_free(local
, sta
);
158 /* protected by RCU */
159 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
162 struct ieee80211_local
*local
= sdata
->local
;
163 struct sta_info
*sta
;
165 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
166 lockdep_is_held(&local
->sta_mtx
));
168 if (sta
->sdata
== sdata
&&
169 ether_addr_equal(sta
->sta
.addr
, addr
))
171 sta
= rcu_dereference_check(sta
->hnext
,
172 lockdep_is_held(&local
->sta_mtx
));
178 * Get sta info either from the specified interface
179 * or from one of its vlans
181 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
184 struct ieee80211_local
*local
= sdata
->local
;
185 struct sta_info
*sta
;
187 sta
= rcu_dereference_check(local
->sta_hash
[STA_HASH(addr
)],
188 lockdep_is_held(&local
->sta_mtx
));
190 if ((sta
->sdata
== sdata
||
191 (sta
->sdata
->bss
&& sta
->sdata
->bss
== sdata
->bss
)) &&
192 ether_addr_equal(sta
->sta
.addr
, addr
))
194 sta
= rcu_dereference_check(sta
->hnext
,
195 lockdep_is_held(&local
->sta_mtx
));
200 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
203 struct ieee80211_local
*local
= sdata
->local
;
204 struct sta_info
*sta
;
207 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
208 if (sdata
!= sta
->sdata
)
221 * sta_info_free - free STA
223 * @local: pointer to the global information
224 * @sta: STA info to free
226 * This function must undo everything done by sta_info_alloc()
227 * that may happen before sta_info_insert(). It may only be
228 * called when sta_info_insert() has not been attempted (and
229 * if that fails, the station is freed anyway.)
231 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
)
236 rate_control_free_sta(sta
);
239 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
240 kfree(sta
->tx_lat
[i
].bins
);
244 sta_dbg(sta
->sdata
, "Destroyed STA %pM\n", sta
->sta
.addr
);
246 kfree(rcu_dereference_raw(sta
->sta
.rates
));
250 /* Caller must hold local->sta_mtx */
251 static void sta_info_hash_add(struct ieee80211_local
*local
,
252 struct sta_info
*sta
)
254 lockdep_assert_held(&local
->sta_mtx
);
255 sta
->hnext
= local
->sta_hash
[STA_HASH(sta
->sta
.addr
)];
256 rcu_assign_pointer(local
->sta_hash
[STA_HASH(sta
->sta
.addr
)], sta
);
259 static void sta_deliver_ps_frames(struct work_struct
*wk
)
261 struct sta_info
*sta
;
263 sta
= container_of(wk
, struct sta_info
, drv_deliver_wk
);
269 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
))
270 ieee80211_sta_ps_deliver_wakeup(sta
);
271 else if (test_and_clear_sta_flag(sta
, WLAN_STA_PSPOLL
))
272 ieee80211_sta_ps_deliver_poll_response(sta
);
273 else if (test_and_clear_sta_flag(sta
, WLAN_STA_UAPSD
))
274 ieee80211_sta_ps_deliver_uapsd(sta
);
278 static int sta_prepare_rate_control(struct ieee80211_local
*local
,
279 struct sta_info
*sta
, gfp_t gfp
)
281 if (local
->hw
.flags
& IEEE80211_HW_HAS_RATE_CONTROL
)
284 sta
->rate_ctrl
= local
->rate_ctrl
;
285 sta
->rate_ctrl_priv
= rate_control_alloc_sta(sta
->rate_ctrl
,
287 if (!sta
->rate_ctrl_priv
)
293 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
294 const u8
*addr
, gfp_t gfp
)
296 struct ieee80211_local
*local
= sdata
->local
;
297 struct sta_info
*sta
;
298 struct timespec uptime
;
299 struct ieee80211_tx_latency_bin_ranges
*tx_latency
;
302 sta
= kzalloc(sizeof(*sta
) + local
->hw
.sta_data_size
, gfp
);
307 tx_latency
= rcu_dereference(local
->tx_latency
);
308 /* init stations Tx latency statistics && TID bins */
310 sta
->tx_lat
= kzalloc(IEEE80211_NUM_TIDS
*
311 sizeof(struct ieee80211_tx_latency_stat
),
318 if (tx_latency
->n_ranges
) {
319 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
320 /* size of bins is size of the ranges +1 */
321 sta
->tx_lat
[i
].bin_count
=
322 tx_latency
->n_ranges
+ 1;
323 sta
->tx_lat
[i
].bins
=
324 kcalloc(sta
->tx_lat
[i
].bin_count
,
325 sizeof(u32
), GFP_ATOMIC
);
326 if (!sta
->tx_lat
[i
].bins
) {
335 spin_lock_init(&sta
->lock
);
336 spin_lock_init(&sta
->ps_lock
);
337 INIT_WORK(&sta
->drv_deliver_wk
, sta_deliver_ps_frames
);
338 INIT_WORK(&sta
->ampdu_mlme
.work
, ieee80211_ba_session_work
);
339 mutex_init(&sta
->ampdu_mlme
.mtx
);
340 #ifdef CONFIG_MAC80211_MESH
341 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
342 !sdata
->u
.mesh
.user_mpm
)
343 init_timer(&sta
->plink_timer
);
344 sta
->nonpeer_pm
= NL80211_MESH_POWER_ACTIVE
;
347 memcpy(sta
->sta
.addr
, addr
, ETH_ALEN
);
350 sta
->last_rx
= jiffies
;
352 sta
->sta_state
= IEEE80211_STA_NONE
;
354 ktime_get_ts(&uptime
);
355 sta
->last_connected
= uptime
.tv_sec
;
356 ewma_init(&sta
->avg_signal
, 1024, 8);
357 for (i
= 0; i
< ARRAY_SIZE(sta
->chain_signal_avg
); i
++)
358 ewma_init(&sta
->chain_signal_avg
[i
], 1024, 8);
360 if (sta_prepare_rate_control(local
, sta
, gfp
))
363 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++) {
365 * timer_to_tid must be initialized with identity mapping
366 * to enable session_timer's data differentiation. See
367 * sta_rx_agg_session_timer_expired for usage.
369 sta
->timer_to_tid
[i
] = i
;
371 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
372 skb_queue_head_init(&sta
->ps_tx_buf
[i
]);
373 skb_queue_head_init(&sta
->tx_filtered
[i
]);
376 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
377 sta
->last_seq_ctrl
[i
] = cpu_to_le16(USHRT_MAX
);
379 sta
->sta
.smps_mode
= IEEE80211_SMPS_OFF
;
380 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
381 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
382 struct ieee80211_supported_band
*sband
=
383 local
->hw
.wiphy
->bands
[ieee80211_get_sdata_band(sdata
)];
384 u8 smps
= (sband
->ht_cap
.cap
& IEEE80211_HT_CAP_SM_PS
) >>
385 IEEE80211_HT_CAP_SM_PS_SHIFT
;
387 * Assume that hostapd advertises our caps in the beacon and
388 * this is the known_smps_mode for a station that just assciated
391 case WLAN_HT_SMPS_CONTROL_DISABLED
:
392 sta
->known_smps_mode
= IEEE80211_SMPS_OFF
;
394 case WLAN_HT_SMPS_CONTROL_STATIC
:
395 sta
->known_smps_mode
= IEEE80211_SMPS_STATIC
;
397 case WLAN_HT_SMPS_CONTROL_DYNAMIC
:
398 sta
->known_smps_mode
= IEEE80211_SMPS_DYNAMIC
;
405 sta_dbg(sdata
, "Allocated STA %pM\n", sta
->sta
.addr
);
410 for (i
= 0; i
< IEEE80211_NUM_TIDS
; i
++)
411 kfree(sta
->tx_lat
[i
].bins
);
418 static int sta_info_insert_check(struct sta_info
*sta
)
420 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
423 * Can't be a WARN_ON because it can be triggered through a race:
424 * something inserts a STA (on one CPU) without holding the RTNL
425 * and another CPU turns off the net device.
427 if (unlikely(!ieee80211_sdata_running(sdata
)))
430 if (WARN_ON(ether_addr_equal(sta
->sta
.addr
, sdata
->vif
.addr
) ||
431 is_multicast_ether_addr(sta
->sta
.addr
)))
437 static int sta_info_insert_drv_state(struct ieee80211_local
*local
,
438 struct ieee80211_sub_if_data
*sdata
,
439 struct sta_info
*sta
)
441 enum ieee80211_sta_state state
;
444 for (state
= IEEE80211_STA_NOTEXIST
; state
< sta
->sta_state
; state
++) {
445 err
= drv_sta_state(local
, sdata
, sta
, state
, state
+ 1);
452 * Drivers using legacy sta_add/sta_remove callbacks only
453 * get uploaded set to true after sta_add is called.
455 if (!local
->ops
->sta_add
)
456 sta
->uploaded
= true;
460 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
462 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
463 sta
->sta
.addr
, state
+ 1, err
);
467 /* unwind on error */
468 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
469 WARN_ON(drv_sta_state(local
, sdata
, sta
, state
, state
- 1));
475 * should be called with sta_mtx locked
476 * this function replaces the mutex lock
479 static int sta_info_insert_finish(struct sta_info
*sta
) __acquires(RCU
)
481 struct ieee80211_local
*local
= sta
->local
;
482 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
483 struct station_info sinfo
;
486 lockdep_assert_held(&local
->sta_mtx
);
488 /* check if STA exists already */
489 if (sta_info_get_bss(sdata
, sta
->sta
.addr
)) {
495 local
->sta_generation
++;
498 /* simplify things and don't accept BA sessions yet */
499 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
501 /* make the station visible */
502 sta_info_hash_add(local
, sta
);
504 list_add_tail_rcu(&sta
->list
, &local
->sta_list
);
507 err
= sta_info_insert_drv_state(local
, sdata
, sta
);
511 set_sta_flag(sta
, WLAN_STA_INSERTED
);
512 /* accept BA sessions now */
513 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
515 ieee80211_recalc_min_chandef(sdata
);
516 ieee80211_sta_debugfs_add(sta
);
517 rate_control_add_sta_debugfs(sta
);
519 memset(&sinfo
, 0, sizeof(sinfo
));
521 sinfo
.generation
= local
->sta_generation
;
522 cfg80211_new_sta(sdata
->dev
, sta
->sta
.addr
, &sinfo
, GFP_KERNEL
);
524 sta_dbg(sdata
, "Inserted STA %pM\n", sta
->sta
.addr
);
526 /* move reference to rcu-protected */
528 mutex_unlock(&local
->sta_mtx
);
530 if (ieee80211_vif_is_mesh(&sdata
->vif
))
531 mesh_accept_plinks_update(sdata
);
535 sta_info_hash_del(local
, sta
);
536 list_del_rcu(&sta
->list
);
539 __cleanup_single_sta(sta
);
541 mutex_unlock(&local
->sta_mtx
);
546 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
)
548 struct ieee80211_local
*local
= sta
->local
;
553 err
= sta_info_insert_check(sta
);
559 mutex_lock(&local
->sta_mtx
);
561 err
= sta_info_insert_finish(sta
);
567 sta_info_free(local
, sta
);
571 int sta_info_insert(struct sta_info
*sta
)
573 int err
= sta_info_insert_rcu(sta
);
580 static inline void __bss_tim_set(u8
*tim
, u16 id
)
583 * This format has been mandated by the IEEE specifications,
584 * so this line may not be changed to use the __set_bit() format.
586 tim
[id
/ 8] |= (1 << (id
% 8));
589 static inline void __bss_tim_clear(u8
*tim
, u16 id
)
592 * This format has been mandated by the IEEE specifications,
593 * so this line may not be changed to use the __clear_bit() format.
595 tim
[id
/ 8] &= ~(1 << (id
% 8));
598 static inline bool __bss_tim_get(u8
*tim
, u16 id
)
601 * This format has been mandated by the IEEE specifications,
602 * so this line may not be changed to use the test_bit() format.
604 return tim
[id
/ 8] & (1 << (id
% 8));
607 static unsigned long ieee80211_tids_for_ac(int ac
)
609 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
611 case IEEE80211_AC_VO
:
612 return BIT(6) | BIT(7);
613 case IEEE80211_AC_VI
:
614 return BIT(4) | BIT(5);
615 case IEEE80211_AC_BE
:
616 return BIT(0) | BIT(3);
617 case IEEE80211_AC_BK
:
618 return BIT(1) | BIT(2);
625 void sta_info_recalc_tim(struct sta_info
*sta
)
627 struct ieee80211_local
*local
= sta
->local
;
629 bool indicate_tim
= false;
630 u8 ignore_for_tim
= sta
->sta
.uapsd_queues
;
634 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
635 sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
636 if (WARN_ON_ONCE(!sta
->sdata
->bss
))
639 ps
= &sta
->sdata
->bss
->ps
;
641 #ifdef CONFIG_MAC80211_MESH
642 } else if (ieee80211_vif_is_mesh(&sta
->sdata
->vif
)) {
643 ps
= &sta
->sdata
->u
.mesh
.ps
;
644 /* TIM map only for 1 <= PLID <= IEEE80211_MAX_AID */
645 id
= sta
->plid
% (IEEE80211_MAX_AID
+ 1);
651 /* No need to do anything if the driver does all */
652 if (local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
)
659 * If all ACs are delivery-enabled then we should build
660 * the TIM bit for all ACs anyway; if only some are then
661 * we ignore those and build the TIM bit using only the
664 if (ignore_for_tim
== BIT(IEEE80211_NUM_ACS
) - 1)
667 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
670 if (ignore_for_tim
& BIT(ac
))
673 indicate_tim
|= !skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
674 !skb_queue_empty(&sta
->ps_tx_buf
[ac
]);
678 tids
= ieee80211_tids_for_ac(ac
);
681 sta
->driver_buffered_tids
& tids
;
685 spin_lock_bh(&local
->tim_lock
);
687 if (indicate_tim
== __bss_tim_get(ps
->tim
, id
))
691 __bss_tim_set(ps
->tim
, id
);
693 __bss_tim_clear(ps
->tim
, id
);
695 if (local
->ops
->set_tim
) {
696 local
->tim_in_locked_section
= true;
697 drv_set_tim(local
, &sta
->sta
, indicate_tim
);
698 local
->tim_in_locked_section
= false;
702 spin_unlock_bh(&local
->tim_lock
);
705 static bool sta_info_buffer_expired(struct sta_info
*sta
, struct sk_buff
*skb
)
707 struct ieee80211_tx_info
*info
;
713 info
= IEEE80211_SKB_CB(skb
);
715 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
716 timeout
= (sta
->listen_interval
*
717 sta
->sdata
->vif
.bss_conf
.beacon_int
*
719 if (timeout
< STA_TX_BUFFER_EXPIRE
)
720 timeout
= STA_TX_BUFFER_EXPIRE
;
721 return time_after(jiffies
, info
->control
.jiffies
+ timeout
);
725 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local
*local
,
726 struct sta_info
*sta
, int ac
)
732 * First check for frames that should expire on the filtered
733 * queue. Frames here were rejected by the driver and are on
734 * a separate queue to avoid reordering with normal PS-buffered
735 * frames. They also aren't accounted for right now in the
736 * total_ps_buffered counter.
739 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
740 skb
= skb_peek(&sta
->tx_filtered
[ac
]);
741 if (sta_info_buffer_expired(sta
, skb
))
742 skb
= __skb_dequeue(&sta
->tx_filtered
[ac
]);
745 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
748 * Frames are queued in order, so if this one
749 * hasn't expired yet we can stop testing. If
750 * we actually reached the end of the queue we
751 * also need to stop, of course.
755 ieee80211_free_txskb(&local
->hw
, skb
);
759 * Now also check the normal PS-buffered queue, this will
760 * only find something if the filtered queue was emptied
761 * since the filtered frames are all before the normal PS
765 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
766 skb
= skb_peek(&sta
->ps_tx_buf
[ac
]);
767 if (sta_info_buffer_expired(sta
, skb
))
768 skb
= __skb_dequeue(&sta
->ps_tx_buf
[ac
]);
771 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
774 * frames are queued in order, so if this one
775 * hasn't expired yet (or we reached the end of
776 * the queue) we can stop testing
781 local
->total_ps_buffered
--;
782 ps_dbg(sta
->sdata
, "Buffered frame expired (STA %pM)\n",
784 ieee80211_free_txskb(&local
->hw
, skb
);
788 * Finally, recalculate the TIM bit for this station -- it might
789 * now be clear because the station was too slow to retrieve its
792 sta_info_recalc_tim(sta
);
795 * Return whether there are any frames still buffered, this is
796 * used to check whether the cleanup timer still needs to run,
797 * if there are no frames we don't need to rearm the timer.
799 return !(skb_queue_empty(&sta
->ps_tx_buf
[ac
]) &&
800 skb_queue_empty(&sta
->tx_filtered
[ac
]));
803 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local
*local
,
804 struct sta_info
*sta
)
806 bool have_buffered
= false;
809 /* This is only necessary for stations on BSS/MBSS interfaces */
810 if (!sta
->sdata
->bss
&&
811 !ieee80211_vif_is_mesh(&sta
->sdata
->vif
))
814 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++)
816 sta_info_cleanup_expire_buffered_ac(local
, sta
, ac
);
818 return have_buffered
;
821 static int __must_check
__sta_info_destroy_part1(struct sta_info
*sta
)
823 struct ieee80211_local
*local
;
824 struct ieee80211_sub_if_data
*sdata
;
835 lockdep_assert_held(&local
->sta_mtx
);
838 * Before removing the station from the driver and
839 * rate control, it might still start new aggregation
840 * sessions -- block that to make sure the tear-down
841 * will be sufficient.
843 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
844 ieee80211_sta_tear_down_BA_sessions(sta
, AGG_STOP_DESTROY_STA
);
846 ret
= sta_info_hash_del(local
, sta
);
850 list_del_rcu(&sta
->list
);
852 drv_sta_pre_rcu_remove(local
, sta
->sdata
, sta
);
854 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
855 rcu_access_pointer(sdata
->u
.vlan
.sta
) == sta
)
856 RCU_INIT_POINTER(sdata
->u
.vlan
.sta
, NULL
);
861 static void __sta_info_destroy_part2(struct sta_info
*sta
)
863 struct ieee80211_local
*local
= sta
->local
;
864 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
868 * NOTE: This assumes at least synchronize_net() was done
869 * after _part1 and before _part2!
873 lockdep_assert_held(&local
->sta_mtx
);
875 /* now keys can no longer be reached */
876 ieee80211_free_sta_keys(local
, sta
);
881 local
->sta_generation
++;
883 while (sta
->sta_state
> IEEE80211_STA_NONE
) {
884 ret
= sta_info_move_state(sta
, sta
->sta_state
- 1);
892 ret
= drv_sta_state(local
, sdata
, sta
, IEEE80211_STA_NONE
,
893 IEEE80211_STA_NOTEXIST
);
894 WARN_ON_ONCE(ret
!= 0);
897 sta_dbg(sdata
, "Removed STA %pM\n", sta
->sta
.addr
);
899 cfg80211_del_sta(sdata
->dev
, sta
->sta
.addr
, GFP_KERNEL
);
901 rate_control_remove_sta_debugfs(sta
);
902 ieee80211_sta_debugfs_remove(sta
);
903 ieee80211_recalc_min_chandef(sdata
);
905 cleanup_single_sta(sta
);
908 int __must_check
__sta_info_destroy(struct sta_info
*sta
)
910 int err
= __sta_info_destroy_part1(sta
);
917 __sta_info_destroy_part2(sta
);
922 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
, const u8
*addr
)
924 struct sta_info
*sta
;
927 mutex_lock(&sdata
->local
->sta_mtx
);
928 sta
= sta_info_get(sdata
, addr
);
929 ret
= __sta_info_destroy(sta
);
930 mutex_unlock(&sdata
->local
->sta_mtx
);
935 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
938 struct sta_info
*sta
;
941 mutex_lock(&sdata
->local
->sta_mtx
);
942 sta
= sta_info_get_bss(sdata
, addr
);
943 ret
= __sta_info_destroy(sta
);
944 mutex_unlock(&sdata
->local
->sta_mtx
);
949 static void sta_info_cleanup(unsigned long data
)
951 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
952 struct sta_info
*sta
;
953 bool timer_needed
= false;
956 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
)
957 if (sta_info_cleanup_expire_buffered(local
, sta
))
961 if (local
->quiescing
)
967 mod_timer(&local
->sta_cleanup
,
968 round_jiffies(jiffies
+ STA_INFO_CLEANUP_INTERVAL
));
971 void sta_info_init(struct ieee80211_local
*local
)
973 spin_lock_init(&local
->tim_lock
);
974 mutex_init(&local
->sta_mtx
);
975 INIT_LIST_HEAD(&local
->sta_list
);
977 setup_timer(&local
->sta_cleanup
, sta_info_cleanup
,
978 (unsigned long)local
);
981 void sta_info_stop(struct ieee80211_local
*local
)
983 del_timer_sync(&local
->sta_cleanup
);
987 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
)
989 struct ieee80211_local
*local
= sdata
->local
;
990 struct sta_info
*sta
, *tmp
;
991 LIST_HEAD(free_list
);
996 WARN_ON(vlans
&& sdata
->vif
.type
!= NL80211_IFTYPE_AP
);
997 WARN_ON(vlans
&& !sdata
->bss
);
999 mutex_lock(&local
->sta_mtx
);
1000 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1001 if (sdata
== sta
->sdata
||
1002 (vlans
&& sdata
->bss
== sta
->sdata
->bss
)) {
1003 if (!WARN_ON(__sta_info_destroy_part1(sta
)))
1004 list_add(&sta
->free_list
, &free_list
);
1009 if (!list_empty(&free_list
)) {
1011 list_for_each_entry_safe(sta
, tmp
, &free_list
, free_list
)
1012 __sta_info_destroy_part2(sta
);
1014 mutex_unlock(&local
->sta_mtx
);
1019 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
1020 unsigned long exp_time
)
1022 struct ieee80211_local
*local
= sdata
->local
;
1023 struct sta_info
*sta
, *tmp
;
1025 mutex_lock(&local
->sta_mtx
);
1027 list_for_each_entry_safe(sta
, tmp
, &local
->sta_list
, list
) {
1028 if (sdata
!= sta
->sdata
)
1031 if (time_after(jiffies
, sta
->last_rx
+ exp_time
)) {
1032 sta_dbg(sta
->sdata
, "expiring inactive STA %pM\n",
1035 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
1036 test_sta_flag(sta
, WLAN_STA_PS_STA
))
1037 atomic_dec(&sdata
->u
.mesh
.ps
.num_sta_ps
);
1039 WARN_ON(__sta_info_destroy(sta
));
1043 mutex_unlock(&local
->sta_mtx
);
1046 struct ieee80211_sta
*ieee80211_find_sta_by_ifaddr(struct ieee80211_hw
*hw
,
1048 const u8
*localaddr
)
1050 struct sta_info
*sta
, *nxt
;
1053 * Just return a random station if localaddr is NULL
1054 * ... first in list.
1056 for_each_sta_info(hw_to_local(hw
), addr
, sta
, nxt
) {
1058 !ether_addr_equal(sta
->sdata
->vif
.addr
, localaddr
))
1067 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr
);
1069 struct ieee80211_sta
*ieee80211_find_sta(struct ieee80211_vif
*vif
,
1072 struct sta_info
*sta
;
1077 sta
= sta_info_get_bss(vif_to_sdata(vif
), addr
);
1086 EXPORT_SYMBOL(ieee80211_find_sta
);
1088 /* powersave support code */
1089 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
)
1091 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1092 struct ieee80211_local
*local
= sdata
->local
;
1093 struct sk_buff_head pending
;
1094 int filtered
= 0, buffered
= 0, ac
;
1095 unsigned long flags
;
1098 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1099 sdata
= container_of(sdata
->bss
, struct ieee80211_sub_if_data
,
1102 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
1103 ps
= &sdata
->bss
->ps
;
1104 else if (ieee80211_vif_is_mesh(&sdata
->vif
))
1105 ps
= &sdata
->u
.mesh
.ps
;
1109 clear_sta_flag(sta
, WLAN_STA_SP
);
1111 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS
) > 1);
1112 sta
->driver_buffered_tids
= 0;
1114 if (!(local
->hw
.flags
& IEEE80211_HW_AP_LINK_PS
))
1115 drv_sta_notify(local
, sdata
, STA_NOTIFY_AWAKE
, &sta
->sta
);
1117 skb_queue_head_init(&pending
);
1119 /* sync with ieee80211_tx_h_unicast_ps_buf */
1120 spin_lock(&sta
->ps_lock
);
1121 /* Send all buffered frames to the station */
1122 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1123 int count
= skb_queue_len(&pending
), tmp
;
1125 spin_lock_irqsave(&sta
->tx_filtered
[ac
].lock
, flags
);
1126 skb_queue_splice_tail_init(&sta
->tx_filtered
[ac
], &pending
);
1127 spin_unlock_irqrestore(&sta
->tx_filtered
[ac
].lock
, flags
);
1128 tmp
= skb_queue_len(&pending
);
1129 filtered
+= tmp
- count
;
1132 spin_lock_irqsave(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1133 skb_queue_splice_tail_init(&sta
->ps_tx_buf
[ac
], &pending
);
1134 spin_unlock_irqrestore(&sta
->ps_tx_buf
[ac
].lock
, flags
);
1135 tmp
= skb_queue_len(&pending
);
1136 buffered
+= tmp
- count
;
1139 ieee80211_add_pending_skbs(local
, &pending
);
1141 /* now we're no longer in the deliver code */
1142 clear_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1144 /* The station might have polled and then woken up before we responded,
1145 * so clear these flags now to avoid them sticking around.
1147 clear_sta_flag(sta
, WLAN_STA_PSPOLL
);
1148 clear_sta_flag(sta
, WLAN_STA_UAPSD
);
1149 spin_unlock(&sta
->ps_lock
);
1151 atomic_dec(&ps
->num_sta_ps
);
1153 /* This station just woke up and isn't aware of our SMPS state */
1154 if (!ieee80211_vif_is_mesh(&sdata
->vif
) &&
1155 !ieee80211_smps_is_restrictive(sta
->known_smps_mode
,
1156 sdata
->smps_mode
) &&
1157 sta
->known_smps_mode
!= sdata
->bss
->req_smps
&&
1158 sta_info_tx_streams(sta
) != 1) {
1160 "%pM just woke up and MIMO capable - update SMPS\n",
1162 ieee80211_send_smps_action(sdata
, sdata
->bss
->req_smps
,
1164 sdata
->vif
.bss_conf
.bssid
);
1167 local
->total_ps_buffered
-= buffered
;
1169 sta_info_recalc_tim(sta
);
1172 "STA %pM aid %d sending %d filtered/%d PS frames since STA not sleeping anymore\n",
1173 sta
->sta
.addr
, sta
->sta
.aid
, filtered
, buffered
);
1176 static void ieee80211_send_null_response(struct ieee80211_sub_if_data
*sdata
,
1177 struct sta_info
*sta
, int tid
,
1178 enum ieee80211_frame_release_type reason
,
1181 struct ieee80211_local
*local
= sdata
->local
;
1182 struct ieee80211_qos_hdr
*nullfunc
;
1183 struct sk_buff
*skb
;
1184 int size
= sizeof(*nullfunc
);
1186 bool qos
= sta
->sta
.wme
;
1187 struct ieee80211_tx_info
*info
;
1188 struct ieee80211_chanctx_conf
*chanctx_conf
;
1191 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1192 IEEE80211_STYPE_QOS_NULLFUNC
|
1193 IEEE80211_FCTL_FROMDS
);
1196 fc
= cpu_to_le16(IEEE80211_FTYPE_DATA
|
1197 IEEE80211_STYPE_NULLFUNC
|
1198 IEEE80211_FCTL_FROMDS
);
1201 skb
= dev_alloc_skb(local
->hw
.extra_tx_headroom
+ size
);
1205 skb_reserve(skb
, local
->hw
.extra_tx_headroom
);
1207 nullfunc
= (void *) skb_put(skb
, size
);
1208 nullfunc
->frame_control
= fc
;
1209 nullfunc
->duration_id
= 0;
1210 memcpy(nullfunc
->addr1
, sta
->sta
.addr
, ETH_ALEN
);
1211 memcpy(nullfunc
->addr2
, sdata
->vif
.addr
, ETH_ALEN
);
1212 memcpy(nullfunc
->addr3
, sdata
->vif
.addr
, ETH_ALEN
);
1213 nullfunc
->seq_ctrl
= 0;
1215 skb
->priority
= tid
;
1216 skb_set_queue_mapping(skb
, ieee802_1d_to_ac
[tid
]);
1218 nullfunc
->qos_ctrl
= cpu_to_le16(tid
);
1220 if (reason
== IEEE80211_FRAME_RELEASE_UAPSD
)
1221 nullfunc
->qos_ctrl
|=
1222 cpu_to_le16(IEEE80211_QOS_CTL_EOSP
);
1225 info
= IEEE80211_SKB_CB(skb
);
1228 * Tell TX path to send this frame even though the
1229 * STA may still remain is PS mode after this frame
1230 * exchange. Also set EOSP to indicate this packet
1231 * ends the poll/service period.
1233 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1234 IEEE80211_TX_CTL_PS_RESPONSE
|
1235 IEEE80211_TX_STATUS_EOSP
|
1236 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1239 drv_allow_buffered_frames(local
, sta
, BIT(tid
), 1,
1242 skb
->dev
= sdata
->dev
;
1245 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
1246 if (WARN_ON(!chanctx_conf
)) {
1252 ieee80211_xmit(sdata
, skb
, chanctx_conf
->def
.chan
->band
);
1256 static int find_highest_prio_tid(unsigned long tids
)
1258 /* lower 3 TIDs aren't ordered perfectly */
1260 return fls(tids
) - 1;
1261 /* TID 0 is BE just like TID 3 */
1264 return fls(tids
) - 1;
1268 ieee80211_sta_ps_deliver_response(struct sta_info
*sta
,
1269 int n_frames
, u8 ignored_acs
,
1270 enum ieee80211_frame_release_type reason
)
1272 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1273 struct ieee80211_local
*local
= sdata
->local
;
1274 bool more_data
= false;
1276 unsigned long driver_release_tids
= 0;
1277 struct sk_buff_head frames
;
1279 /* Service or PS-Poll period starts */
1280 set_sta_flag(sta
, WLAN_STA_SP
);
1282 __skb_queue_head_init(&frames
);
1284 /* Get response frame(s) and more data bit for the last one. */
1285 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1288 if (ignored_acs
& BIT(ac
))
1291 tids
= ieee80211_tids_for_ac(ac
);
1293 /* if we already have frames from software, then we can't also
1294 * release from hardware queues
1296 if (skb_queue_empty(&frames
))
1297 driver_release_tids
|= sta
->driver_buffered_tids
& tids
;
1299 if (driver_release_tids
) {
1300 /* If the driver has data on more than one TID then
1301 * certainly there's more data if we release just a
1302 * single frame now (from a single TID). This will
1303 * only happen for PS-Poll.
1305 if (reason
== IEEE80211_FRAME_RELEASE_PSPOLL
&&
1306 hweight16(driver_release_tids
) > 1) {
1308 driver_release_tids
=
1309 BIT(find_highest_prio_tid(
1310 driver_release_tids
));
1314 struct sk_buff
*skb
;
1316 while (n_frames
> 0) {
1317 skb
= skb_dequeue(&sta
->tx_filtered
[ac
]);
1320 &sta
->ps_tx_buf
[ac
]);
1322 local
->total_ps_buffered
--;
1327 __skb_queue_tail(&frames
, skb
);
1331 /* If we have more frames buffered on this AC, then set the
1332 * more-data bit and abort the loop since we can't send more
1333 * data from other ACs before the buffered frames from this.
1335 if (!skb_queue_empty(&sta
->tx_filtered
[ac
]) ||
1336 !skb_queue_empty(&sta
->ps_tx_buf
[ac
])) {
1342 if (skb_queue_empty(&frames
) && !driver_release_tids
) {
1346 * For PS-Poll, this can only happen due to a race condition
1347 * when we set the TIM bit and the station notices it, but
1348 * before it can poll for the frame we expire it.
1350 * For uAPSD, this is said in the standard (11.2.1.5 h):
1351 * At each unscheduled SP for a non-AP STA, the AP shall
1352 * attempt to transmit at least one MSDU or MMPDU, but no
1353 * more than the value specified in the Max SP Length field
1354 * in the QoS Capability element from delivery-enabled ACs,
1355 * that are destined for the non-AP STA.
1357 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1360 /* This will evaluate to 1, 3, 5 or 7. */
1361 tid
= 7 - ((ffs(~ignored_acs
) - 1) << 1);
1363 ieee80211_send_null_response(sdata
, sta
, tid
, reason
, true);
1364 } else if (!driver_release_tids
) {
1365 struct sk_buff_head pending
;
1366 struct sk_buff
*skb
;
1369 bool need_null
= false;
1371 skb_queue_head_init(&pending
);
1373 while ((skb
= __skb_dequeue(&frames
))) {
1374 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
1375 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
1381 * Tell TX path to send this frame even though the
1382 * STA may still remain is PS mode after this frame
1385 info
->flags
|= IEEE80211_TX_CTL_NO_PS_BUFFER
|
1386 IEEE80211_TX_CTL_PS_RESPONSE
;
1389 * Use MoreData flag to indicate whether there are
1390 * more buffered frames for this STA
1392 if (more_data
|| !skb_queue_empty(&frames
))
1393 hdr
->frame_control
|=
1394 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1396 hdr
->frame_control
&=
1397 cpu_to_le16(~IEEE80211_FCTL_MOREDATA
);
1399 if (ieee80211_is_data_qos(hdr
->frame_control
) ||
1400 ieee80211_is_qos_nullfunc(hdr
->frame_control
))
1401 qoshdr
= ieee80211_get_qos_ctl(hdr
);
1403 tids
|= BIT(skb
->priority
);
1405 __skb_queue_tail(&pending
, skb
);
1407 /* end service period after last frame or add one */
1408 if (!skb_queue_empty(&frames
))
1411 if (reason
!= IEEE80211_FRAME_RELEASE_UAPSD
) {
1412 /* for PS-Poll, there's only one frame */
1413 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1414 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1418 /* For uAPSD, things are a bit more complicated. If the
1419 * last frame has a QoS header (i.e. is a QoS-data or
1420 * QoS-nulldata frame) then just set the EOSP bit there
1422 * If the frame doesn't have a QoS header (which means
1423 * it should be a bufferable MMPDU) then we can't set
1424 * the EOSP bit in the QoS header; add a QoS-nulldata
1425 * frame to the list to send it after the MMPDU.
1427 * Note that this code is only in the mac80211-release
1428 * code path, we assume that the driver will not buffer
1429 * anything but QoS-data frames, or if it does, will
1430 * create the QoS-nulldata frame by itself if needed.
1432 * Cf. 802.11-2012 10.2.1.10 (c).
1435 *qoshdr
|= IEEE80211_QOS_CTL_EOSP
;
1437 info
->flags
|= IEEE80211_TX_STATUS_EOSP
|
1438 IEEE80211_TX_CTL_REQ_TX_STATUS
;
1440 /* The standard isn't completely clear on this
1441 * as it says the more-data bit should be set
1442 * if there are more BUs. The QoS-Null frame
1443 * we're about to send isn't buffered yet, we
1444 * only create it below, but let's pretend it
1445 * was buffered just in case some clients only
1446 * expect more-data=0 when eosp=1.
1448 hdr
->frame_control
|=
1449 cpu_to_le16(IEEE80211_FCTL_MOREDATA
);
1456 drv_allow_buffered_frames(local
, sta
, tids
, num
,
1459 ieee80211_add_pending_skbs(local
, &pending
);
1462 ieee80211_send_null_response(
1463 sdata
, sta
, find_highest_prio_tid(tids
),
1466 sta_info_recalc_tim(sta
);
1469 * We need to release a frame that is buffered somewhere in the
1470 * driver ... it'll have to handle that.
1471 * Note that the driver also has to check the number of frames
1472 * on the TIDs we're releasing from - if there are more than
1473 * n_frames it has to set the more-data bit (if we didn't ask
1474 * it to set it anyway due to other buffered frames); if there
1475 * are fewer than n_frames it has to make sure to adjust that
1476 * to allow the service period to end properly.
1478 drv_release_buffered_frames(local
, sta
, driver_release_tids
,
1479 n_frames
, reason
, more_data
);
1482 * Note that we don't recalculate the TIM bit here as it would
1483 * most likely have no effect at all unless the driver told us
1484 * that the TID(s) became empty before returning here from the
1486 * Either way, however, when the driver tells us that the TID(s)
1487 * became empty we'll do the TIM recalculation.
1492 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
)
1494 u8 ignore_for_response
= sta
->sta
.uapsd_queues
;
1497 * If all ACs are delivery-enabled then we should reply
1498 * from any of them, if only some are enabled we reply
1499 * only from the non-enabled ones.
1501 if (ignore_for_response
== BIT(IEEE80211_NUM_ACS
) - 1)
1502 ignore_for_response
= 0;
1504 ieee80211_sta_ps_deliver_response(sta
, 1, ignore_for_response
,
1505 IEEE80211_FRAME_RELEASE_PSPOLL
);
1508 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
)
1510 int n_frames
= sta
->sta
.max_sp
;
1511 u8 delivery_enabled
= sta
->sta
.uapsd_queues
;
1514 * If we ever grow support for TSPEC this might happen if
1515 * the TSPEC update from hostapd comes in between a trigger
1516 * frame setting WLAN_STA_UAPSD in the RX path and this
1517 * actually getting called.
1519 if (!delivery_enabled
)
1522 switch (sta
->sta
.max_sp
) {
1533 /* XXX: what is a good value? */
1538 ieee80211_sta_ps_deliver_response(sta
, n_frames
, ~delivery_enabled
,
1539 IEEE80211_FRAME_RELEASE_UAPSD
);
1542 void ieee80211_sta_block_awake(struct ieee80211_hw
*hw
,
1543 struct ieee80211_sta
*pubsta
, bool block
)
1545 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1547 trace_api_sta_block_awake(sta
->local
, pubsta
, block
);
1550 set_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1554 if (!test_sta_flag(sta
, WLAN_STA_PS_DRIVER
))
1557 if (!test_sta_flag(sta
, WLAN_STA_PS_STA
)) {
1558 set_sta_flag(sta
, WLAN_STA_PS_DELIVER
);
1559 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1560 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1561 } else if (test_sta_flag(sta
, WLAN_STA_PSPOLL
) ||
1562 test_sta_flag(sta
, WLAN_STA_UAPSD
)) {
1563 /* must be asleep in this case */
1564 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1565 ieee80211_queue_work(hw
, &sta
->drv_deliver_wk
);
1567 clear_sta_flag(sta
, WLAN_STA_PS_DRIVER
);
1570 EXPORT_SYMBOL(ieee80211_sta_block_awake
);
1572 void ieee80211_sta_eosp(struct ieee80211_sta
*pubsta
)
1574 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1575 struct ieee80211_local
*local
= sta
->local
;
1577 trace_api_eosp(local
, pubsta
);
1579 clear_sta_flag(sta
, WLAN_STA_SP
);
1581 EXPORT_SYMBOL(ieee80211_sta_eosp
);
1583 void ieee80211_sta_set_buffered(struct ieee80211_sta
*pubsta
,
1584 u8 tid
, bool buffered
)
1586 struct sta_info
*sta
= container_of(pubsta
, struct sta_info
, sta
);
1588 if (WARN_ON(tid
>= IEEE80211_NUM_TIDS
))
1591 trace_api_sta_set_buffered(sta
->local
, pubsta
, tid
, buffered
);
1594 set_bit(tid
, &sta
->driver_buffered_tids
);
1596 clear_bit(tid
, &sta
->driver_buffered_tids
);
1598 sta_info_recalc_tim(sta
);
1600 EXPORT_SYMBOL(ieee80211_sta_set_buffered
);
1602 int sta_info_move_state(struct sta_info
*sta
,
1603 enum ieee80211_sta_state new_state
)
1607 if (sta
->sta_state
== new_state
)
1610 /* check allowed transitions first */
1612 switch (new_state
) {
1613 case IEEE80211_STA_NONE
:
1614 if (sta
->sta_state
!= IEEE80211_STA_AUTH
)
1617 case IEEE80211_STA_AUTH
:
1618 if (sta
->sta_state
!= IEEE80211_STA_NONE
&&
1619 sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1622 case IEEE80211_STA_ASSOC
:
1623 if (sta
->sta_state
!= IEEE80211_STA_AUTH
&&
1624 sta
->sta_state
!= IEEE80211_STA_AUTHORIZED
)
1627 case IEEE80211_STA_AUTHORIZED
:
1628 if (sta
->sta_state
!= IEEE80211_STA_ASSOC
)
1632 WARN(1, "invalid state %d", new_state
);
1636 sta_dbg(sta
->sdata
, "moving STA %pM to state %d\n",
1637 sta
->sta
.addr
, new_state
);
1640 * notify the driver before the actual changes so it can
1641 * fail the transition
1643 if (test_sta_flag(sta
, WLAN_STA_INSERTED
)) {
1644 int err
= drv_sta_state(sta
->local
, sta
->sdata
, sta
,
1645 sta
->sta_state
, new_state
);
1650 /* reflect the change in all state variables */
1652 switch (new_state
) {
1653 case IEEE80211_STA_NONE
:
1654 if (sta
->sta_state
== IEEE80211_STA_AUTH
)
1655 clear_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1657 case IEEE80211_STA_AUTH
:
1658 if (sta
->sta_state
== IEEE80211_STA_NONE
)
1659 set_bit(WLAN_STA_AUTH
, &sta
->_flags
);
1660 else if (sta
->sta_state
== IEEE80211_STA_ASSOC
)
1661 clear_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1663 case IEEE80211_STA_ASSOC
:
1664 if (sta
->sta_state
== IEEE80211_STA_AUTH
) {
1665 set_bit(WLAN_STA_ASSOC
, &sta
->_flags
);
1666 } else if (sta
->sta_state
== IEEE80211_STA_AUTHORIZED
) {
1667 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1668 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1669 !sta
->sdata
->u
.vlan
.sta
))
1670 atomic_dec(&sta
->sdata
->bss
->num_mcast_sta
);
1671 clear_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1674 case IEEE80211_STA_AUTHORIZED
:
1675 if (sta
->sta_state
== IEEE80211_STA_ASSOC
) {
1676 if (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP
||
1677 (sta
->sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
1678 !sta
->sdata
->u
.vlan
.sta
))
1679 atomic_inc(&sta
->sdata
->bss
->num_mcast_sta
);
1680 set_bit(WLAN_STA_AUTHORIZED
, &sta
->_flags
);
1687 sta
->sta_state
= new_state
;
1692 u8
sta_info_tx_streams(struct sta_info
*sta
)
1694 struct ieee80211_sta_ht_cap
*ht_cap
= &sta
->sta
.ht_cap
;
1697 if (!sta
->sta
.ht_cap
.ht_supported
)
1700 if (sta
->sta
.vht_cap
.vht_supported
) {
1703 le16_to_cpu(sta
->sta
.vht_cap
.vht_mcs
.tx_mcs_map
);
1705 for (i
= 7; i
>= 0; i
--)
1706 if ((tx_mcs_map
& (0x3 << (i
* 2))) !=
1707 IEEE80211_VHT_MCS_NOT_SUPPORTED
)
1711 if (ht_cap
->mcs
.rx_mask
[3])
1713 else if (ht_cap
->mcs
.rx_mask
[2])
1715 else if (ht_cap
->mcs
.rx_mask
[1])
1720 if (!(ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_RX_DIFF
))
1723 return ((ht_cap
->mcs
.tx_params
& IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK
)
1724 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
) + 1;
1727 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
)
1729 struct ieee80211_sub_if_data
*sdata
= sta
->sdata
;
1730 struct ieee80211_local
*local
= sdata
->local
;
1731 struct rate_control_ref
*ref
= NULL
;
1732 struct timespec uptime
;
1737 if (test_sta_flag(sta
, WLAN_STA_RATE_CONTROL
))
1738 ref
= local
->rate_ctrl
;
1740 sinfo
->generation
= sdata
->local
->sta_generation
;
1742 sinfo
->filled
= STATION_INFO_INACTIVE_TIME
|
1743 STATION_INFO_RX_BYTES64
|
1744 STATION_INFO_TX_BYTES64
|
1745 STATION_INFO_RX_PACKETS
|
1746 STATION_INFO_TX_PACKETS
|
1747 STATION_INFO_TX_RETRIES
|
1748 STATION_INFO_TX_FAILED
|
1749 STATION_INFO_TX_BITRATE
|
1750 STATION_INFO_RX_BITRATE
|
1751 STATION_INFO_RX_DROP_MISC
|
1752 STATION_INFO_BSS_PARAM
|
1753 STATION_INFO_CONNECTED_TIME
|
1754 STATION_INFO_STA_FLAGS
|
1755 STATION_INFO_BEACON_LOSS_COUNT
;
1757 ktime_get_ts(&uptime
);
1758 sinfo
->connected_time
= uptime
.tv_sec
- sta
->last_connected
;
1760 sinfo
->inactive_time
= jiffies_to_msecs(jiffies
- sta
->last_rx
);
1761 sinfo
->tx_bytes
= 0;
1762 for (ac
= 0; ac
< IEEE80211_NUM_ACS
; ac
++) {
1763 sinfo
->tx_bytes
+= sta
->tx_bytes
[ac
];
1764 packets
+= sta
->tx_packets
[ac
];
1766 sinfo
->tx_packets
= packets
;
1767 sinfo
->rx_bytes
= sta
->rx_bytes
;
1768 sinfo
->rx_packets
= sta
->rx_packets
;
1769 sinfo
->tx_retries
= sta
->tx_retry_count
;
1770 sinfo
->tx_failed
= sta
->tx_retry_failed
;
1771 sinfo
->rx_dropped_misc
= sta
->rx_dropped
;
1772 sinfo
->beacon_loss_count
= sta
->beacon_loss_count
;
1774 if ((sta
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
) ||
1775 (sta
->local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)) {
1776 sinfo
->filled
|= STATION_INFO_SIGNAL
| STATION_INFO_SIGNAL_AVG
;
1777 if (!local
->ops
->get_rssi
||
1778 drv_get_rssi(local
, sdata
, &sta
->sta
, &sinfo
->signal
))
1779 sinfo
->signal
= (s8
)sta
->last_signal
;
1780 sinfo
->signal_avg
= (s8
) -ewma_read(&sta
->avg_signal
);
1783 sinfo
->filled
|= STATION_INFO_CHAIN_SIGNAL
|
1784 STATION_INFO_CHAIN_SIGNAL_AVG
;
1786 sinfo
->chains
= sta
->chains
;
1787 for (i
= 0; i
< ARRAY_SIZE(sinfo
->chain_signal
); i
++) {
1788 sinfo
->chain_signal
[i
] = sta
->chain_signal_last
[i
];
1789 sinfo
->chain_signal_avg
[i
] =
1790 (s8
) -ewma_read(&sta
->chain_signal_avg
[i
]);
1794 sta_set_rate_info_tx(sta
, &sta
->last_tx_rate
, &sinfo
->txrate
);
1795 sta_set_rate_info_rx(sta
, &sinfo
->rxrate
);
1797 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
1798 #ifdef CONFIG_MAC80211_MESH
1799 sinfo
->filled
|= STATION_INFO_LLID
|
1801 STATION_INFO_PLINK_STATE
|
1802 STATION_INFO_LOCAL_PM
|
1803 STATION_INFO_PEER_PM
|
1804 STATION_INFO_NONPEER_PM
;
1806 sinfo
->llid
= sta
->llid
;
1807 sinfo
->plid
= sta
->plid
;
1808 sinfo
->plink_state
= sta
->plink_state
;
1809 if (test_sta_flag(sta
, WLAN_STA_TOFFSET_KNOWN
)) {
1810 sinfo
->filled
|= STATION_INFO_T_OFFSET
;
1811 sinfo
->t_offset
= sta
->t_offset
;
1813 sinfo
->local_pm
= sta
->local_pm
;
1814 sinfo
->peer_pm
= sta
->peer_pm
;
1815 sinfo
->nonpeer_pm
= sta
->nonpeer_pm
;
1819 sinfo
->bss_param
.flags
= 0;
1820 if (sdata
->vif
.bss_conf
.use_cts_prot
)
1821 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_CTS_PROT
;
1822 if (sdata
->vif
.bss_conf
.use_short_preamble
)
1823 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_PREAMBLE
;
1824 if (sdata
->vif
.bss_conf
.use_short_slot
)
1825 sinfo
->bss_param
.flags
|= BSS_PARAM_FLAGS_SHORT_SLOT_TIME
;
1826 sinfo
->bss_param
.dtim_period
= sdata
->vif
.bss_conf
.dtim_period
;
1827 sinfo
->bss_param
.beacon_interval
= sdata
->vif
.bss_conf
.beacon_int
;
1829 sinfo
->sta_flags
.set
= 0;
1830 sinfo
->sta_flags
.mask
= BIT(NL80211_STA_FLAG_AUTHORIZED
) |
1831 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
) |
1832 BIT(NL80211_STA_FLAG_WME
) |
1833 BIT(NL80211_STA_FLAG_MFP
) |
1834 BIT(NL80211_STA_FLAG_AUTHENTICATED
) |
1835 BIT(NL80211_STA_FLAG_ASSOCIATED
) |
1836 BIT(NL80211_STA_FLAG_TDLS_PEER
);
1837 if (test_sta_flag(sta
, WLAN_STA_AUTHORIZED
))
1838 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHORIZED
);
1839 if (test_sta_flag(sta
, WLAN_STA_SHORT_PREAMBLE
))
1840 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE
);
1842 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_WME
);
1843 if (test_sta_flag(sta
, WLAN_STA_MFP
))
1844 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_MFP
);
1845 if (test_sta_flag(sta
, WLAN_STA_AUTH
))
1846 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_AUTHENTICATED
);
1847 if (test_sta_flag(sta
, WLAN_STA_ASSOC
))
1848 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_ASSOCIATED
);
1849 if (test_sta_flag(sta
, WLAN_STA_TDLS_PEER
))
1850 sinfo
->sta_flags
.set
|= BIT(NL80211_STA_FLAG_TDLS_PEER
);
1852 /* check if the driver has a SW RC implementation */
1853 if (ref
&& ref
->ops
->get_expected_throughput
)
1854 thr
= ref
->ops
->get_expected_throughput(sta
->rate_ctrl_priv
);
1856 thr
= drv_get_expected_throughput(local
, &sta
->sta
);
1859 sinfo
->filled
|= STATION_INFO_EXPECTED_THROUGHPUT
;
1860 sinfo
->expected_throughput
= thr
;