1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
7 * Copyright (C) 2018-2021 Intel Corporation
8 */
9
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/etherdevice.h>
13 #include <linux/netdevice.h>
14 #include <linux/types.h>
15 #include <linux/slab.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/timer.h>
19 #include <linux/rtnetlink.h>
20
21 #include <net/codel.h>
22 #include <net/mac80211.h>
23 #include "ieee80211_i.h"
24 #include "driver-ops.h"
25 #include "rate.h"
26 #include "sta_info.h"
27 #include "debugfs_sta.h"
28 #include "mesh.h"
29 #include "wme.h"
30
31 /**
32 * DOC: STA information lifetime rules
33 *
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.
37 *
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
45 * encryption keys.
46 *
47 * When the insertion fails (sta_info_insert()) returns non-zero), the
48 * structure will have been freed by sta_info_insert()!
49 *
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.
57 *
58 * In order to remove a STA info structure, various sta_info_destroy_*()
59 * calls are available.
60 *
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.
65 */
66
67 static const struct rhashtable_params sta_rht_params = {
68 .nelem_hint = 3, /* start small */
69 .automatic_shrinking = true,
70 .head_offset = offsetof(struct sta_info, hash_node),
71 .key_offset = offsetof(struct sta_info, addr),
72 .key_len = ETH_ALEN,
73 .max_size = CONFIG_MAC80211_STA_HASH_MAX_SIZE,
74 };
75
76 /* Caller must hold local->sta_mtx */
sta_info_hash_del(struct ieee80211_local * local,struct sta_info * sta)77 static int sta_info_hash_del(struct ieee80211_local *local,
78 struct sta_info *sta)
79 {
80 return rhltable_remove(&local->sta_hash, &sta->hash_node,
81 sta_rht_params);
82 }
83
__cleanup_single_sta(struct sta_info * sta)84 static void __cleanup_single_sta(struct sta_info *sta)
85 {
86 int ac, i;
87 struct tid_ampdu_tx *tid_tx;
88 struct ieee80211_sub_if_data *sdata = sta->sdata;
89 struct ieee80211_local *local = sdata->local;
90 struct ps_data *ps;
91
92 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
93 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
94 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
95 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
96 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
97 ps = &sdata->bss->ps;
98 else if (ieee80211_vif_is_mesh(&sdata->vif))
99 ps = &sdata->u.mesh.ps;
100 else
101 return;
102
103 clear_sta_flag(sta, WLAN_STA_PS_STA);
104 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
105 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
106
107 atomic_dec(&ps->num_sta_ps);
108 }
109
110 if (sta->sta.txq[0]) {
111 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
112 struct txq_info *txqi;
113
114 if (!sta->sta.txq[i])
115 continue;
116
117 txqi = to_txq_info(sta->sta.txq[i]);
118
119 ieee80211_txq_purge(local, txqi);
120 }
121 }
122
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]);
127 }
128
129 if (ieee80211_vif_is_mesh(&sdata->vif))
130 mesh_sta_cleanup(sta);
131
132 cancel_work_sync(&sta->drv_deliver_wk);
133
134 /*
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.
139 */
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]);
143 if (!tid_tx)
144 continue;
145 ieee80211_purge_tx_queue(&local->hw, &tid_tx->pending);
146 kfree(tid_tx);
147 }
148 }
149
cleanup_single_sta(struct sta_info * sta)150 static void cleanup_single_sta(struct sta_info *sta)
151 {
152 struct ieee80211_sub_if_data *sdata = sta->sdata;
153 struct ieee80211_local *local = sdata->local;
154
155 __cleanup_single_sta(sta);
156 sta_info_free(local, sta);
157 }
158
sta_info_hash_lookup(struct ieee80211_local * local,const u8 * addr)159 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
160 const u8 *addr)
161 {
162 return rhltable_lookup(&local->sta_hash, addr, sta_rht_params);
163 }
164
165 /* protected by RCU */
sta_info_get(struct ieee80211_sub_if_data * sdata,const u8 * addr)166 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
167 const u8 *addr)
168 {
169 struct ieee80211_local *local = sdata->local;
170 struct rhlist_head *tmp;
171 struct sta_info *sta;
172
173 rcu_read_lock();
174 for_each_sta_info(local, addr, sta, tmp) {
175 if (sta->sdata == sdata) {
176 rcu_read_unlock();
177 /* this is safe as the caller must already hold
178 * another rcu read section or the mutex
179 */
180 return sta;
181 }
182 }
183 rcu_read_unlock();
184 return NULL;
185 }
186
187 /*
188 * Get sta info either from the specified interface
189 * or from one of its vlans
190 */
sta_info_get_bss(struct ieee80211_sub_if_data * sdata,const u8 * addr)191 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
192 const u8 *addr)
193 {
194 struct ieee80211_local *local = sdata->local;
195 struct rhlist_head *tmp;
196 struct sta_info *sta;
197
198 rcu_read_lock();
199 for_each_sta_info(local, addr, sta, tmp) {
200 if (sta->sdata == sdata ||
201 (sta->sdata->bss && sta->sdata->bss == sdata->bss)) {
202 rcu_read_unlock();
203 /* this is safe as the caller must already hold
204 * another rcu read section or the mutex
205 */
206 return sta;
207 }
208 }
209 rcu_read_unlock();
210 return NULL;
211 }
212
sta_info_get_by_addrs(struct ieee80211_local * local,const u8 * sta_addr,const u8 * vif_addr)213 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
214 const u8 *sta_addr, const u8 *vif_addr)
215 {
216 struct rhlist_head *tmp;
217 struct sta_info *sta;
218
219 for_each_sta_info(local, sta_addr, sta, tmp) {
220 if (ether_addr_equal(vif_addr, sta->sdata->vif.addr))
221 return sta;
222 }
223
224 return NULL;
225 }
226
sta_info_get_by_idx(struct ieee80211_sub_if_data * sdata,int idx)227 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
228 int idx)
229 {
230 struct ieee80211_local *local = sdata->local;
231 struct sta_info *sta;
232 int i = 0;
233
234 list_for_each_entry_rcu(sta, &local->sta_list, list,
235 lockdep_is_held(&local->sta_mtx)) {
236 if (sdata != sta->sdata)
237 continue;
238 if (i < idx) {
239 ++i;
240 continue;
241 }
242 return sta;
243 }
244
245 return NULL;
246 }
247
248 /**
249 * sta_info_free - free STA
250 *
251 * @local: pointer to the global information
252 * @sta: STA info to free
253 *
254 * This function must undo everything done by sta_info_alloc()
255 * that may happen before sta_info_insert(). It may only be
256 * called when sta_info_insert() has not been attempted (and
257 * if that fails, the station is freed anyway.)
258 */
sta_info_free(struct ieee80211_local * local,struct sta_info * sta)259 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta)
260 {
261 /*
262 * If we had used sta_info_pre_move_state() then we might not
263 * have gone through the state transitions down again, so do
264 * it here now (and warn if it's inserted).
265 *
266 * This will clear state such as fast TX/RX that may have been
267 * allocated during state transitions.
268 */
269 while (sta->sta_state > IEEE80211_STA_NONE) {
270 int ret;
271
272 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
273
274 ret = sta_info_move_state(sta, sta->sta_state - 1);
275 if (WARN_ONCE(ret, "sta_info_move_state() returned %d\n", ret))
276 break;
277 }
278
279 if (sta->rate_ctrl)
280 rate_control_free_sta(sta);
281
282 sta_dbg(sta->sdata, "Destroyed STA %pM\n", sta->sta.addr);
283
284 if (sta->sta.txq[0])
285 kfree(to_txq_info(sta->sta.txq[0]));
286 kfree(rcu_dereference_raw(sta->sta.rates));
287 #ifdef CONFIG_MAC80211_MESH
288 kfree(sta->mesh);
289 #endif
290 free_percpu(sta->pcpu_rx_stats);
291 kfree(sta);
292 }
293
294 /* Caller must hold local->sta_mtx */
sta_info_hash_add(struct ieee80211_local * local,struct sta_info * sta)295 static int sta_info_hash_add(struct ieee80211_local *local,
296 struct sta_info *sta)
297 {
298 return rhltable_insert(&local->sta_hash, &sta->hash_node,
299 sta_rht_params);
300 }
301
sta_deliver_ps_frames(struct work_struct * wk)302 static void sta_deliver_ps_frames(struct work_struct *wk)
303 {
304 struct sta_info *sta;
305
306 sta = container_of(wk, struct sta_info, drv_deliver_wk);
307
308 if (sta->dead)
309 return;
310
311 local_bh_disable();
312 if (!test_sta_flag(sta, WLAN_STA_PS_STA))
313 ieee80211_sta_ps_deliver_wakeup(sta);
314 else if (test_and_clear_sta_flag(sta, WLAN_STA_PSPOLL))
315 ieee80211_sta_ps_deliver_poll_response(sta);
316 else if (test_and_clear_sta_flag(sta, WLAN_STA_UAPSD))
317 ieee80211_sta_ps_deliver_uapsd(sta);
318 local_bh_enable();
319 }
320
sta_prepare_rate_control(struct ieee80211_local * local,struct sta_info * sta,gfp_t gfp)321 static int sta_prepare_rate_control(struct ieee80211_local *local,
322 struct sta_info *sta, gfp_t gfp)
323 {
324 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
325 return 0;
326
327 sta->rate_ctrl = local->rate_ctrl;
328 sta->rate_ctrl_priv = rate_control_alloc_sta(sta->rate_ctrl,
329 sta, gfp);
330 if (!sta->rate_ctrl_priv)
331 return -ENOMEM;
332
333 return 0;
334 }
335
sta_info_alloc(struct ieee80211_sub_if_data * sdata,const u8 * addr,gfp_t gfp)336 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
337 const u8 *addr, gfp_t gfp)
338 {
339 struct ieee80211_local *local = sdata->local;
340 struct ieee80211_hw *hw = &local->hw;
341 struct sta_info *sta;
342 int i;
343
344 sta = kzalloc(sizeof(*sta) + hw->sta_data_size, gfp);
345 if (!sta)
346 return NULL;
347
348 if (ieee80211_hw_check(hw, USES_RSS)) {
349 sta->pcpu_rx_stats =
350 alloc_percpu_gfp(struct ieee80211_sta_rx_stats, gfp);
351 if (!sta->pcpu_rx_stats)
352 goto free;
353 }
354
355 spin_lock_init(&sta->lock);
356 spin_lock_init(&sta->ps_lock);
357 INIT_WORK(&sta->drv_deliver_wk, sta_deliver_ps_frames);
358 INIT_WORK(&sta->ampdu_mlme.work, ieee80211_ba_session_work);
359 mutex_init(&sta->ampdu_mlme.mtx);
360 #ifdef CONFIG_MAC80211_MESH
361 if (ieee80211_vif_is_mesh(&sdata->vif)) {
362 sta->mesh = kzalloc(sizeof(*sta->mesh), gfp);
363 if (!sta->mesh)
364 goto free;
365 sta->mesh->plink_sta = sta;
366 spin_lock_init(&sta->mesh->plink_lock);
367 if (ieee80211_vif_is_mesh(&sdata->vif) &&
368 !sdata->u.mesh.user_mpm)
369 timer_setup(&sta->mesh->plink_timer, mesh_plink_timer,
370 0);
371 sta->mesh->nonpeer_pm = NL80211_MESH_POWER_ACTIVE;
372 }
373 #endif
374
375 memcpy(sta->addr, addr, ETH_ALEN);
376 memcpy(sta->sta.addr, addr, ETH_ALEN);
377 sta->sta.max_rx_aggregation_subframes =
378 local->hw.max_rx_aggregation_subframes;
379
380 /* Extended Key ID needs to install keys for keyid 0 and 1 Rx-only.
381 * The Tx path starts to use a key as soon as the key slot ptk_idx
382 * references to is not NULL. To not use the initial Rx-only key
383 * prematurely for Tx initialize ptk_idx to an impossible PTK keyid
384 * which always will refer to a NULL key.
385 */
386 BUILD_BUG_ON(ARRAY_SIZE(sta->ptk) <= INVALID_PTK_KEYIDX);
387 sta->ptk_idx = INVALID_PTK_KEYIDX;
388
389 sta->local = local;
390 sta->sdata = sdata;
391 sta->rx_stats.last_rx = jiffies;
392
393 u64_stats_init(&sta->rx_stats.syncp);
394
395 ieee80211_init_frag_cache(&sta->frags);
396
397 sta->sta_state = IEEE80211_STA_NONE;
398
399 /* Mark TID as unreserved */
400 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
401
402 sta->last_connected = ktime_get_seconds();
403 ewma_signal_init(&sta->rx_stats_avg.signal);
404 ewma_avg_signal_init(&sta->status_stats.avg_ack_signal);
405 for (i = 0; i < ARRAY_SIZE(sta->rx_stats_avg.chain_signal); i++)
406 ewma_signal_init(&sta->rx_stats_avg.chain_signal[i]);
407
408 if (local->ops->wake_tx_queue) {
409 void *txq_data;
410 int size = sizeof(struct txq_info) +
411 ALIGN(hw->txq_data_size, sizeof(void *));
412
413 txq_data = kcalloc(ARRAY_SIZE(sta->sta.txq), size, gfp);
414 if (!txq_data)
415 goto free;
416
417 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
418 struct txq_info *txq = txq_data + i * size;
419
420 /* might not do anything for the bufferable MMPDU TXQ */
421 ieee80211_txq_init(sdata, sta, txq, i);
422 }
423 }
424
425 if (sta_prepare_rate_control(local, sta, gfp))
426 goto free_txq;
427
428
429 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
430 skb_queue_head_init(&sta->ps_tx_buf[i]);
431 skb_queue_head_init(&sta->tx_filtered[i]);
432 init_airtime_info(&sta->airtime[i], &local->airtime[i]);
433 }
434
435 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
436 sta->last_seq_ctrl[i] = cpu_to_le16(USHRT_MAX);
437
438 for (i = 0; i < NUM_NL80211_BANDS; i++) {
439 u32 mandatory = 0;
440 int r;
441
442 if (!hw->wiphy->bands[i])
443 continue;
444
445 switch (i) {
446 case NL80211_BAND_2GHZ:
447 case NL80211_BAND_LC:
448 /*
449 * We use both here, even if we cannot really know for
450 * sure the station will support both, but the only use
451 * for this is when we don't know anything yet and send
452 * management frames, and then we'll pick the lowest
453 * possible rate anyway.
454 * If we don't include _G here, we cannot find a rate
455 * in P2P, and thus trigger the WARN_ONCE() in rate.c
456 */
457 mandatory = IEEE80211_RATE_MANDATORY_B |
458 IEEE80211_RATE_MANDATORY_G;
459 break;
460 case NL80211_BAND_5GHZ:
461 mandatory = IEEE80211_RATE_MANDATORY_A;
462 break;
463 case NL80211_BAND_60GHZ:
464 WARN_ON(1);
465 mandatory = 0;
466 break;
467 }
468
469 for (r = 0; r < hw->wiphy->bands[i]->n_bitrates; r++) {
470 struct ieee80211_rate *rate;
471
472 rate = &hw->wiphy->bands[i]->bitrates[r];
473
474 if (!(rate->flags & mandatory))
475 continue;
476 sta->sta.supp_rates[i] |= BIT(r);
477 }
478 }
479
480 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
481 if (sdata->vif.type == NL80211_IFTYPE_AP ||
482 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
483 struct ieee80211_supported_band *sband;
484 u8 smps;
485
486 sband = ieee80211_get_sband(sdata);
487 if (!sband)
488 goto free_txq;
489
490 smps = (sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS) >>
491 IEEE80211_HT_CAP_SM_PS_SHIFT;
492 /*
493 * Assume that hostapd advertises our caps in the beacon and
494 * this is the known_smps_mode for a station that just assciated
495 */
496 switch (smps) {
497 case WLAN_HT_SMPS_CONTROL_DISABLED:
498 sta->known_smps_mode = IEEE80211_SMPS_OFF;
499 break;
500 case WLAN_HT_SMPS_CONTROL_STATIC:
501 sta->known_smps_mode = IEEE80211_SMPS_STATIC;
502 break;
503 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
504 sta->known_smps_mode = IEEE80211_SMPS_DYNAMIC;
505 break;
506 default:
507 WARN_ON(1);
508 }
509 }
510
511 sta->sta.max_rc_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_BA;
512
513 sta->cparams.ce_threshold = CODEL_DISABLED_THRESHOLD;
514 sta->cparams.target = MS2TIME(20);
515 sta->cparams.interval = MS2TIME(100);
516 sta->cparams.ecn = true;
517 sta->cparams.ce_threshold_selector = 0;
518 sta->cparams.ce_threshold_mask = 0;
519
520 sta_dbg(sdata, "Allocated STA %pM\n", sta->sta.addr);
521
522 return sta;
523
524 free_txq:
525 if (sta->sta.txq[0])
526 kfree(to_txq_info(sta->sta.txq[0]));
527 free:
528 free_percpu(sta->pcpu_rx_stats);
529 #ifdef CONFIG_MAC80211_MESH
530 kfree(sta->mesh);
531 #endif
532 kfree(sta);
533 return NULL;
534 }
535
sta_info_insert_check(struct sta_info * sta)536 static int sta_info_insert_check(struct sta_info *sta)
537 {
538 struct ieee80211_sub_if_data *sdata = sta->sdata;
539
540 /*
541 * Can't be a WARN_ON because it can be triggered through a race:
542 * something inserts a STA (on one CPU) without holding the RTNL
543 * and another CPU turns off the net device.
544 */
545 if (unlikely(!ieee80211_sdata_running(sdata)))
546 return -ENETDOWN;
547
548 if (WARN_ON(ether_addr_equal(sta->sta.addr, sdata->vif.addr) ||
549 !is_valid_ether_addr(sta->sta.addr)))
550 return -EINVAL;
551
552 /* The RCU read lock is required by rhashtable due to
553 * asynchronous resize/rehash. We also require the mutex
554 * for correctness.
555 */
556 rcu_read_lock();
557 lockdep_assert_held(&sdata->local->sta_mtx);
558 if (ieee80211_hw_check(&sdata->local->hw, NEEDS_UNIQUE_STA_ADDR) &&
559 ieee80211_find_sta_by_ifaddr(&sdata->local->hw, sta->addr, NULL)) {
560 rcu_read_unlock();
561 return -ENOTUNIQ;
562 }
563 rcu_read_unlock();
564
565 return 0;
566 }
567
sta_info_insert_drv_state(struct ieee80211_local * local,struct ieee80211_sub_if_data * sdata,struct sta_info * sta)568 static int sta_info_insert_drv_state(struct ieee80211_local *local,
569 struct ieee80211_sub_if_data *sdata,
570 struct sta_info *sta)
571 {
572 enum ieee80211_sta_state state;
573 int err = 0;
574
575 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; state++) {
576 err = drv_sta_state(local, sdata, sta, state, state + 1);
577 if (err)
578 break;
579 }
580
581 if (!err) {
582 /*
583 * Drivers using legacy sta_add/sta_remove callbacks only
584 * get uploaded set to true after sta_add is called.
585 */
586 if (!local->ops->sta_add)
587 sta->uploaded = true;
588 return 0;
589 }
590
591 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
592 sdata_info(sdata,
593 "failed to move IBSS STA %pM to state %d (%d) - keeping it anyway\n",
594 sta->sta.addr, state + 1, err);
595 err = 0;
596 }
597
598 /* unwind on error */
599 for (; state > IEEE80211_STA_NOTEXIST; state--)
600 WARN_ON(drv_sta_state(local, sdata, sta, state, state - 1));
601
602 return err;
603 }
604
605 static void
ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data * sdata)606 ieee80211_recalc_p2p_go_ps_allowed(struct ieee80211_sub_if_data *sdata)
607 {
608 struct ieee80211_local *local = sdata->local;
609 bool allow_p2p_go_ps = sdata->vif.p2p;
610 struct sta_info *sta;
611
612 rcu_read_lock();
613 list_for_each_entry_rcu(sta, &local->sta_list, list) {
614 if (sdata != sta->sdata ||
615 !test_sta_flag(sta, WLAN_STA_ASSOC))
616 continue;
617 if (!sta->sta.support_p2p_ps) {
618 allow_p2p_go_ps = false;
619 break;
620 }
621 }
622 rcu_read_unlock();
623
624 if (allow_p2p_go_ps != sdata->vif.bss_conf.allow_p2p_go_ps) {
625 sdata->vif.bss_conf.allow_p2p_go_ps = allow_p2p_go_ps;
626 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_P2P_PS);
627 }
628 }
629
630 /*
631 * should be called with sta_mtx locked
632 * this function replaces the mutex lock
633 * with a RCU lock
634 */
sta_info_insert_finish(struct sta_info * sta)635 static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
636 {
637 struct ieee80211_local *local = sta->local;
638 struct ieee80211_sub_if_data *sdata = sta->sdata;
639 struct station_info *sinfo = NULL;
640 int err = 0;
641
642 lockdep_assert_held(&local->sta_mtx);
643
644 /* check if STA exists already */
645 if (sta_info_get_bss(sdata, sta->sta.addr)) {
646 err = -EEXIST;
647 goto out_cleanup;
648 }
649
650 sinfo = kzalloc(sizeof(struct station_info), GFP_KERNEL);
651 if (!sinfo) {
652 err = -ENOMEM;
653 goto out_cleanup;
654 }
655
656 local->num_sta++;
657 local->sta_generation++;
658 smp_mb();
659
660 /* simplify things and don't accept BA sessions yet */
661 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
662
663 /* make the station visible */
664 err = sta_info_hash_add(local, sta);
665 if (err)
666 goto out_drop_sta;
667
668 list_add_tail_rcu(&sta->list, &local->sta_list);
669
670 /* update channel context before notifying the driver about state
671 * change, this enables driver using the updated channel context right away.
672 */
673 if (sta->sta_state >= IEEE80211_STA_ASSOC) {
674 ieee80211_recalc_min_chandef(sta->sdata);
675 if (!sta->sta.support_p2p_ps)
676 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
677 }
678
679 /* notify driver */
680 err = sta_info_insert_drv_state(local, sdata, sta);
681 if (err)
682 goto out_remove;
683
684 set_sta_flag(sta, WLAN_STA_INSERTED);
685
686 /* accept BA sessions now */
687 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
688
689 ieee80211_sta_debugfs_add(sta);
690 rate_control_add_sta_debugfs(sta);
691
692 sinfo->generation = local->sta_generation;
693 cfg80211_new_sta(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
694 kfree(sinfo);
695
696 sta_dbg(sdata, "Inserted STA %pM\n", sta->sta.addr);
697
698 /* move reference to rcu-protected */
699 rcu_read_lock();
700 mutex_unlock(&local->sta_mtx);
701
702 if (ieee80211_vif_is_mesh(&sdata->vif))
703 mesh_accept_plinks_update(sdata);
704
705 return 0;
706 out_remove:
707 sta_info_hash_del(local, sta);
708 list_del_rcu(&sta->list);
709 out_drop_sta:
710 local->num_sta--;
711 synchronize_net();
712 out_cleanup:
713 cleanup_single_sta(sta);
714 mutex_unlock(&local->sta_mtx);
715 kfree(sinfo);
716 rcu_read_lock();
717 return err;
718 }
719
sta_info_insert_rcu(struct sta_info * sta)720 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU)
721 {
722 struct ieee80211_local *local = sta->local;
723 int err;
724
725 might_sleep();
726
727 mutex_lock(&local->sta_mtx);
728
729 err = sta_info_insert_check(sta);
730 if (err) {
731 sta_info_free(local, sta);
732 mutex_unlock(&local->sta_mtx);
733 rcu_read_lock();
734 return err;
735 }
736
737 return sta_info_insert_finish(sta);
738 }
739
sta_info_insert(struct sta_info * sta)740 int sta_info_insert(struct sta_info *sta)
741 {
742 int err = sta_info_insert_rcu(sta);
743
744 rcu_read_unlock();
745
746 return err;
747 }
748
__bss_tim_set(u8 * tim,u16 id)749 static inline void __bss_tim_set(u8 *tim, u16 id)
750 {
751 /*
752 * This format has been mandated by the IEEE specifications,
753 * so this line may not be changed to use the __set_bit() format.
754 */
755 tim[id / 8] |= (1 << (id % 8));
756 }
757
__bss_tim_clear(u8 * tim,u16 id)758 static inline void __bss_tim_clear(u8 *tim, u16 id)
759 {
760 /*
761 * This format has been mandated by the IEEE specifications,
762 * so this line may not be changed to use the __clear_bit() format.
763 */
764 tim[id / 8] &= ~(1 << (id % 8));
765 }
766
__bss_tim_get(u8 * tim,u16 id)767 static inline bool __bss_tim_get(u8 *tim, u16 id)
768 {
769 /*
770 * This format has been mandated by the IEEE specifications,
771 * so this line may not be changed to use the test_bit() format.
772 */
773 return tim[id / 8] & (1 << (id % 8));
774 }
775
ieee80211_tids_for_ac(int ac)776 static unsigned long ieee80211_tids_for_ac(int ac)
777 {
778 /* If we ever support TIDs > 7, this obviously needs to be adjusted */
779 switch (ac) {
780 case IEEE80211_AC_VO:
781 return BIT(6) | BIT(7);
782 case IEEE80211_AC_VI:
783 return BIT(4) | BIT(5);
784 case IEEE80211_AC_BE:
785 return BIT(0) | BIT(3);
786 case IEEE80211_AC_BK:
787 return BIT(1) | BIT(2);
788 default:
789 WARN_ON(1);
790 return 0;
791 }
792 }
793
__sta_info_recalc_tim(struct sta_info * sta,bool ignore_pending)794 static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
795 {
796 struct ieee80211_local *local = sta->local;
797 struct ps_data *ps;
798 bool indicate_tim = false;
799 u8 ignore_for_tim = sta->sta.uapsd_queues;
800 int ac;
801 u16 id = sta->sta.aid;
802
803 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
804 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
805 if (WARN_ON_ONCE(!sta->sdata->bss))
806 return;
807
808 ps = &sta->sdata->bss->ps;
809 #ifdef CONFIG_MAC80211_MESH
810 } else if (ieee80211_vif_is_mesh(&sta->sdata->vif)) {
811 ps = &sta->sdata->u.mesh.ps;
812 #endif
813 } else {
814 return;
815 }
816
817 /* No need to do anything if the driver does all */
818 if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim)
819 return;
820
821 if (sta->dead)
822 goto done;
823
824 /*
825 * If all ACs are delivery-enabled then we should build
826 * the TIM bit for all ACs anyway; if only some are then
827 * we ignore those and build the TIM bit using only the
828 * non-enabled ones.
829 */
830 if (ignore_for_tim == BIT(IEEE80211_NUM_ACS) - 1)
831 ignore_for_tim = 0;
832
833 if (ignore_pending)
834 ignore_for_tim = BIT(IEEE80211_NUM_ACS) - 1;
835
836 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
837 unsigned long tids;
838
839 if (ignore_for_tim & ieee80211_ac_to_qos_mask[ac])
840 continue;
841
842 indicate_tim |= !skb_queue_empty(&sta->tx_filtered[ac]) ||
843 !skb_queue_empty(&sta->ps_tx_buf[ac]);
844 if (indicate_tim)
845 break;
846
847 tids = ieee80211_tids_for_ac(ac);
848
849 indicate_tim |=
850 sta->driver_buffered_tids & tids;
851 indicate_tim |=
852 sta->txq_buffered_tids & tids;
853 }
854
855 done:
856 spin_lock_bh(&local->tim_lock);
857
858 if (indicate_tim == __bss_tim_get(ps->tim, id))
859 goto out_unlock;
860
861 if (indicate_tim)
862 __bss_tim_set(ps->tim, id);
863 else
864 __bss_tim_clear(ps->tim, id);
865
866 if (local->ops->set_tim && !WARN_ON(sta->dead)) {
867 local->tim_in_locked_section = true;
868 drv_set_tim(local, &sta->sta, indicate_tim);
869 local->tim_in_locked_section = false;
870 }
871
872 out_unlock:
873 spin_unlock_bh(&local->tim_lock);
874 }
875
sta_info_recalc_tim(struct sta_info * sta)876 void sta_info_recalc_tim(struct sta_info *sta)
877 {
878 __sta_info_recalc_tim(sta, false);
879 }
880
sta_info_buffer_expired(struct sta_info * sta,struct sk_buff * skb)881 static bool sta_info_buffer_expired(struct sta_info *sta, struct sk_buff *skb)
882 {
883 struct ieee80211_tx_info *info;
884 int timeout;
885
886 if (!skb)
887 return false;
888
889 info = IEEE80211_SKB_CB(skb);
890
891 /* Timeout: (2 * listen_interval * beacon_int * 1024 / 1000000) sec */
892 timeout = (sta->listen_interval *
893 sta->sdata->vif.bss_conf.beacon_int *
894 32 / 15625) * HZ;
895 if (timeout < STA_TX_BUFFER_EXPIRE)
896 timeout = STA_TX_BUFFER_EXPIRE;
897 return time_after(jiffies, info->control.jiffies + timeout);
898 }
899
900
sta_info_cleanup_expire_buffered_ac(struct ieee80211_local * local,struct sta_info * sta,int ac)901 static bool sta_info_cleanup_expire_buffered_ac(struct ieee80211_local *local,
902 struct sta_info *sta, int ac)
903 {
904 unsigned long flags;
905 struct sk_buff *skb;
906
907 /*
908 * First check for frames that should expire on the filtered
909 * queue. Frames here were rejected by the driver and are on
910 * a separate queue to avoid reordering with normal PS-buffered
911 * frames. They also aren't accounted for right now in the
912 * total_ps_buffered counter.
913 */
914 for (;;) {
915 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
916 skb = skb_peek(&sta->tx_filtered[ac]);
917 if (sta_info_buffer_expired(sta, skb))
918 skb = __skb_dequeue(&sta->tx_filtered[ac]);
919 else
920 skb = NULL;
921 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
922
923 /*
924 * Frames are queued in order, so if this one
925 * hasn't expired yet we can stop testing. If
926 * we actually reached the end of the queue we
927 * also need to stop, of course.
928 */
929 if (!skb)
930 break;
931 ieee80211_free_txskb(&local->hw, skb);
932 }
933
934 /*
935 * Now also check the normal PS-buffered queue, this will
936 * only find something if the filtered queue was emptied
937 * since the filtered frames are all before the normal PS
938 * buffered frames.
939 */
940 for (;;) {
941 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
942 skb = skb_peek(&sta->ps_tx_buf[ac]);
943 if (sta_info_buffer_expired(sta, skb))
944 skb = __skb_dequeue(&sta->ps_tx_buf[ac]);
945 else
946 skb = NULL;
947 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
948
949 /*
950 * frames are queued in order, so if this one
951 * hasn't expired yet (or we reached the end of
952 * the queue) we can stop testing
953 */
954 if (!skb)
955 break;
956
957 local->total_ps_buffered--;
958 ps_dbg(sta->sdata, "Buffered frame expired (STA %pM)\n",
959 sta->sta.addr);
960 ieee80211_free_txskb(&local->hw, skb);
961 }
962
963 /*
964 * Finally, recalculate the TIM bit for this station -- it might
965 * now be clear because the station was too slow to retrieve its
966 * frames.
967 */
968 sta_info_recalc_tim(sta);
969
970 /*
971 * Return whether there are any frames still buffered, this is
972 * used to check whether the cleanup timer still needs to run,
973 * if there are no frames we don't need to rearm the timer.
974 */
975 return !(skb_queue_empty(&sta->ps_tx_buf[ac]) &&
976 skb_queue_empty(&sta->tx_filtered[ac]));
977 }
978
sta_info_cleanup_expire_buffered(struct ieee80211_local * local,struct sta_info * sta)979 static bool sta_info_cleanup_expire_buffered(struct ieee80211_local *local,
980 struct sta_info *sta)
981 {
982 bool have_buffered = false;
983 int ac;
984
985 /* This is only necessary for stations on BSS/MBSS interfaces */
986 if (!sta->sdata->bss &&
987 !ieee80211_vif_is_mesh(&sta->sdata->vif))
988 return false;
989
990 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
991 have_buffered |=
992 sta_info_cleanup_expire_buffered_ac(local, sta, ac);
993
994 return have_buffered;
995 }
996
__sta_info_destroy_part1(struct sta_info * sta)997 static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
998 {
999 struct ieee80211_local *local;
1000 struct ieee80211_sub_if_data *sdata;
1001 int ret;
1002
1003 might_sleep();
1004
1005 if (!sta)
1006 return -ENOENT;
1007
1008 local = sta->local;
1009 sdata = sta->sdata;
1010
1011 lockdep_assert_held(&local->sta_mtx);
1012
1013 /*
1014 * Before removing the station from the driver and
1015 * rate control, it might still start new aggregation
1016 * sessions -- block that to make sure the tear-down
1017 * will be sufficient.
1018 */
1019 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
1020 ieee80211_sta_tear_down_BA_sessions(sta, AGG_STOP_DESTROY_STA);
1021
1022 /*
1023 * Before removing the station from the driver there might be pending
1024 * rx frames on RSS queues sent prior to the disassociation - wait for
1025 * all such frames to be processed.
1026 */
1027 drv_sync_rx_queues(local, sta);
1028
1029 ret = sta_info_hash_del(local, sta);
1030 if (WARN_ON(ret))
1031 return ret;
1032
1033 /*
1034 * for TDLS peers, make sure to return to the base channel before
1035 * removal.
1036 */
1037 if (test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
1038 drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
1039 clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
1040 }
1041
1042 list_del_rcu(&sta->list);
1043 sta->removed = true;
1044
1045 drv_sta_pre_rcu_remove(local, sta->sdata, sta);
1046
1047 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
1048 rcu_access_pointer(sdata->u.vlan.sta) == sta)
1049 RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);
1050
1051 return 0;
1052 }
1053
__sta_info_destroy_part2(struct sta_info * sta)1054 static void __sta_info_destroy_part2(struct sta_info *sta)
1055 {
1056 struct ieee80211_local *local = sta->local;
1057 struct ieee80211_sub_if_data *sdata = sta->sdata;
1058 struct station_info *sinfo;
1059 int ret;
1060
1061 /*
1062 * NOTE: This assumes at least synchronize_net() was done
1063 * after _part1 and before _part2!
1064 */
1065
1066 might_sleep();
1067 lockdep_assert_held(&local->sta_mtx);
1068
1069 if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
1070 ret = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
1071 WARN_ON_ONCE(ret);
1072 }
1073
1074 /* now keys can no longer be reached */
1075 ieee80211_free_sta_keys(local, sta);
1076
1077 /* disable TIM bit - last chance to tell driver */
1078 __sta_info_recalc_tim(sta, true);
1079
1080 sta->dead = true;
1081
1082 local->num_sta--;
1083 local->sta_generation++;
1084
1085 while (sta->sta_state > IEEE80211_STA_NONE) {
1086 ret = sta_info_move_state(sta, sta->sta_state - 1);
1087 if (ret) {
1088 WARN_ON_ONCE(1);
1089 break;
1090 }
1091 }
1092
1093 if (sta->uploaded) {
1094 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
1095 IEEE80211_STA_NOTEXIST);
1096 WARN_ON_ONCE(ret != 0);
1097 }
1098
1099 sta_dbg(sdata, "Removed STA %pM\n", sta->sta.addr);
1100
1101 sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
1102 if (sinfo)
1103 sta_set_sinfo(sta, sinfo, true);
1104 cfg80211_del_sta_sinfo(sdata->dev, sta->sta.addr, sinfo, GFP_KERNEL);
1105 kfree(sinfo);
1106
1107 ieee80211_sta_debugfs_remove(sta);
1108
1109 ieee80211_destroy_frag_cache(&sta->frags);
1110
1111 cleanup_single_sta(sta);
1112 }
1113
__sta_info_destroy(struct sta_info * sta)1114 int __must_check __sta_info_destroy(struct sta_info *sta)
1115 {
1116 int err = __sta_info_destroy_part1(sta);
1117
1118 if (err)
1119 return err;
1120
1121 synchronize_net();
1122
1123 __sta_info_destroy_part2(sta);
1124
1125 return 0;
1126 }
1127
sta_info_destroy_addr(struct ieee80211_sub_if_data * sdata,const u8 * addr)1128 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, const u8 *addr)
1129 {
1130 struct sta_info *sta;
1131 int ret;
1132
1133 mutex_lock(&sdata->local->sta_mtx);
1134 sta = sta_info_get(sdata, addr);
1135 ret = __sta_info_destroy(sta);
1136 mutex_unlock(&sdata->local->sta_mtx);
1137
1138 return ret;
1139 }
1140
sta_info_destroy_addr_bss(struct ieee80211_sub_if_data * sdata,const u8 * addr)1141 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
1142 const u8 *addr)
1143 {
1144 struct sta_info *sta;
1145 int ret;
1146
1147 mutex_lock(&sdata->local->sta_mtx);
1148 sta = sta_info_get_bss(sdata, addr);
1149 ret = __sta_info_destroy(sta);
1150 mutex_unlock(&sdata->local->sta_mtx);
1151
1152 return ret;
1153 }
1154
sta_info_cleanup(struct timer_list * t)1155 static void sta_info_cleanup(struct timer_list *t)
1156 {
1157 struct ieee80211_local *local = from_timer(local, t, sta_cleanup);
1158 struct sta_info *sta;
1159 bool timer_needed = false;
1160
1161 rcu_read_lock();
1162 list_for_each_entry_rcu(sta, &local->sta_list, list)
1163 if (sta_info_cleanup_expire_buffered(local, sta))
1164 timer_needed = true;
1165 rcu_read_unlock();
1166
1167 if (local->quiescing)
1168 return;
1169
1170 if (!timer_needed)
1171 return;
1172
1173 mod_timer(&local->sta_cleanup,
1174 round_jiffies(jiffies + STA_INFO_CLEANUP_INTERVAL));
1175 }
1176
sta_info_init(struct ieee80211_local * local)1177 int sta_info_init(struct ieee80211_local *local)
1178 {
1179 int err;
1180
1181 err = rhltable_init(&local->sta_hash, &sta_rht_params);
1182 if (err)
1183 return err;
1184
1185 spin_lock_init(&local->tim_lock);
1186 mutex_init(&local->sta_mtx);
1187 INIT_LIST_HEAD(&local->sta_list);
1188
1189 timer_setup(&local->sta_cleanup, sta_info_cleanup, 0);
1190 return 0;
1191 }
1192
sta_info_stop(struct ieee80211_local * local)1193 void sta_info_stop(struct ieee80211_local *local)
1194 {
1195 del_timer_sync(&local->sta_cleanup);
1196 rhltable_destroy(&local->sta_hash);
1197 }
1198
1199
__sta_info_flush(struct ieee80211_sub_if_data * sdata,bool vlans)1200 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans)
1201 {
1202 struct ieee80211_local *local = sdata->local;
1203 struct sta_info *sta, *tmp;
1204 LIST_HEAD(free_list);
1205 int ret = 0;
1206
1207 might_sleep();
1208
1209 WARN_ON(vlans && sdata->vif.type != NL80211_IFTYPE_AP);
1210 WARN_ON(vlans && !sdata->bss);
1211
1212 mutex_lock(&local->sta_mtx);
1213 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1214 if (sdata == sta->sdata ||
1215 (vlans && sdata->bss == sta->sdata->bss)) {
1216 if (!WARN_ON(__sta_info_destroy_part1(sta)))
1217 list_add(&sta->free_list, &free_list);
1218 ret++;
1219 }
1220 }
1221
1222 if (!list_empty(&free_list)) {
1223 synchronize_net();
1224 list_for_each_entry_safe(sta, tmp, &free_list, free_list)
1225 __sta_info_destroy_part2(sta);
1226 }
1227 mutex_unlock(&local->sta_mtx);
1228
1229 return ret;
1230 }
1231
ieee80211_sta_expire(struct ieee80211_sub_if_data * sdata,unsigned long exp_time)1232 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
1233 unsigned long exp_time)
1234 {
1235 struct ieee80211_local *local = sdata->local;
1236 struct sta_info *sta, *tmp;
1237
1238 mutex_lock(&local->sta_mtx);
1239
1240 list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {
1241 unsigned long last_active = ieee80211_sta_last_active(sta);
1242
1243 if (sdata != sta->sdata)
1244 continue;
1245
1246 if (time_is_before_jiffies(last_active + exp_time)) {
1247 sta_dbg(sta->sdata, "expiring inactive STA %pM\n",
1248 sta->sta.addr);
1249
1250 if (ieee80211_vif_is_mesh(&sdata->vif) &&
1251 test_sta_flag(sta, WLAN_STA_PS_STA))
1252 atomic_dec(&sdata->u.mesh.ps.num_sta_ps);
1253
1254 WARN_ON(__sta_info_destroy(sta));
1255 }
1256 }
1257
1258 mutex_unlock(&local->sta_mtx);
1259 }
1260
ieee80211_find_sta_by_ifaddr(struct ieee80211_hw * hw,const u8 * addr,const u8 * localaddr)1261 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
1262 const u8 *addr,
1263 const u8 *localaddr)
1264 {
1265 struct ieee80211_local *local = hw_to_local(hw);
1266 struct rhlist_head *tmp;
1267 struct sta_info *sta;
1268
1269 /*
1270 * Just return a random station if localaddr is NULL
1271 * ... first in list.
1272 */
1273 for_each_sta_info(local, addr, sta, tmp) {
1274 if (localaddr &&
1275 !ether_addr_equal(sta->sdata->vif.addr, localaddr))
1276 continue;
1277 if (!sta->uploaded)
1278 return NULL;
1279 return &sta->sta;
1280 }
1281
1282 return NULL;
1283 }
1284 EXPORT_SYMBOL_GPL(ieee80211_find_sta_by_ifaddr);
1285
ieee80211_find_sta(struct ieee80211_vif * vif,const u8 * addr)1286 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
1287 const u8 *addr)
1288 {
1289 struct sta_info *sta;
1290
1291 if (!vif)
1292 return NULL;
1293
1294 sta = sta_info_get_bss(vif_to_sdata(vif), addr);
1295 if (!sta)
1296 return NULL;
1297
1298 if (!sta->uploaded)
1299 return NULL;
1300
1301 return &sta->sta;
1302 }
1303 EXPORT_SYMBOL(ieee80211_find_sta);
1304
1305 /* powersave support code */
ieee80211_sta_ps_deliver_wakeup(struct sta_info * sta)1306 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
1307 {
1308 struct ieee80211_sub_if_data *sdata = sta->sdata;
1309 struct ieee80211_local *local = sdata->local;
1310 struct sk_buff_head pending;
1311 int filtered = 0, buffered = 0, ac, i;
1312 unsigned long flags;
1313 struct ps_data *ps;
1314
1315 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1316 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
1317 u.ap);
1318
1319 if (sdata->vif.type == NL80211_IFTYPE_AP)
1320 ps = &sdata->bss->ps;
1321 else if (ieee80211_vif_is_mesh(&sdata->vif))
1322 ps = &sdata->u.mesh.ps;
1323 else
1324 return;
1325
1326 clear_sta_flag(sta, WLAN_STA_SP);
1327
1328 BUILD_BUG_ON(BITS_TO_LONGS(IEEE80211_NUM_TIDS) > 1);
1329 sta->driver_buffered_tids = 0;
1330 sta->txq_buffered_tids = 0;
1331
1332 if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
1333 drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
1334
1335 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
1336 if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
1337 continue;
1338
1339 schedule_and_wake_txq(local, to_txq_info(sta->sta.txq[i]));
1340 }
1341
1342 skb_queue_head_init(&pending);
1343
1344 /* sync with ieee80211_tx_h_unicast_ps_buf */
1345 spin_lock(&sta->ps_lock);
1346 /* Send all buffered frames to the station */
1347 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1348 int count = skb_queue_len(&pending), tmp;
1349
1350 spin_lock_irqsave(&sta->tx_filtered[ac].lock, flags);
1351 skb_queue_splice_tail_init(&sta->tx_filtered[ac], &pending);
1352 spin_unlock_irqrestore(&sta->tx_filtered[ac].lock, flags);
1353 tmp = skb_queue_len(&pending);
1354 filtered += tmp - count;
1355 count = tmp;
1356
1357 spin_lock_irqsave(&sta->ps_tx_buf[ac].lock, flags);
1358 skb_queue_splice_tail_init(&sta->ps_tx_buf[ac], &pending);
1359 spin_unlock_irqrestore(&sta->ps_tx_buf[ac].lock, flags);
1360 tmp = skb_queue_len(&pending);
1361 buffered += tmp - count;
1362 }
1363
1364 ieee80211_add_pending_skbs(local, &pending);
1365
1366 /* now we're no longer in the deliver code */
1367 clear_sta_flag(sta, WLAN_STA_PS_DELIVER);
1368
1369 /* The station might have polled and then woken up before we responded,
1370 * so clear these flags now to avoid them sticking around.
1371 */
1372 clear_sta_flag(sta, WLAN_STA_PSPOLL);
1373 clear_sta_flag(sta, WLAN_STA_UAPSD);
1374 spin_unlock(&sta->ps_lock);
1375
1376 atomic_dec(&ps->num_sta_ps);
1377
1378 local->total_ps_buffered -= buffered;
1379
1380 sta_info_recalc_tim(sta);
1381
1382 ps_dbg(sdata,
1383 "STA %pM aid %d sending %d filtered/%d PS frames since STA woke up\n",
1384 sta->sta.addr, sta->sta.aid, filtered, buffered);
1385
1386 ieee80211_check_fast_xmit(sta);
1387 }
1388
ieee80211_send_null_response(struct sta_info * sta,int tid,enum ieee80211_frame_release_type reason,bool call_driver,bool more_data)1389 static void ieee80211_send_null_response(struct sta_info *sta, int tid,
1390 enum ieee80211_frame_release_type reason,
1391 bool call_driver, bool more_data)
1392 {
1393 struct ieee80211_sub_if_data *sdata = sta->sdata;
1394 struct ieee80211_local *local = sdata->local;
1395 struct ieee80211_qos_hdr *nullfunc;
1396 struct sk_buff *skb;
1397 int size = sizeof(*nullfunc);
1398 __le16 fc;
1399 bool qos = sta->sta.wme;
1400 struct ieee80211_tx_info *info;
1401 struct ieee80211_chanctx_conf *chanctx_conf;
1402
1403 if (qos) {
1404 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1405 IEEE80211_STYPE_QOS_NULLFUNC |
1406 IEEE80211_FCTL_FROMDS);
1407 } else {
1408 size -= 2;
1409 fc = cpu_to_le16(IEEE80211_FTYPE_DATA |
1410 IEEE80211_STYPE_NULLFUNC |
1411 IEEE80211_FCTL_FROMDS);
1412 }
1413
1414 skb = dev_alloc_skb(local->hw.extra_tx_headroom + size);
1415 if (!skb)
1416 return;
1417
1418 skb_reserve(skb, local->hw.extra_tx_headroom);
1419
1420 nullfunc = skb_put(skb, size);
1421 nullfunc->frame_control = fc;
1422 nullfunc->duration_id = 0;
1423 memcpy(nullfunc->addr1, sta->sta.addr, ETH_ALEN);
1424 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
1425 memcpy(nullfunc->addr3, sdata->vif.addr, ETH_ALEN);
1426 nullfunc->seq_ctrl = 0;
1427
1428 skb->priority = tid;
1429 skb_set_queue_mapping(skb, ieee802_1d_to_ac[tid]);
1430 if (qos) {
1431 nullfunc->qos_ctrl = cpu_to_le16(tid);
1432
1433 if (reason == IEEE80211_FRAME_RELEASE_UAPSD) {
1434 nullfunc->qos_ctrl |=
1435 cpu_to_le16(IEEE80211_QOS_CTL_EOSP);
1436 if (more_data)
1437 nullfunc->frame_control |=
1438 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1439 }
1440 }
1441
1442 info = IEEE80211_SKB_CB(skb);
1443
1444 /*
1445 * Tell TX path to send this frame even though the
1446 * STA may still remain is PS mode after this frame
1447 * exchange. Also set EOSP to indicate this packet
1448 * ends the poll/service period.
1449 */
1450 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER |
1451 IEEE80211_TX_STATUS_EOSP |
1452 IEEE80211_TX_CTL_REQ_TX_STATUS;
1453
1454 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1455
1456 if (call_driver)
1457 drv_allow_buffered_frames(local, sta, BIT(tid), 1,
1458 reason, false);
1459
1460 skb->dev = sdata->dev;
1461
1462 rcu_read_lock();
1463 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1464 if (WARN_ON(!chanctx_conf)) {
1465 rcu_read_unlock();
1466 kfree_skb(skb);
1467 return;
1468 }
1469
1470 info->band = chanctx_conf->def.chan->band;
1471 ieee80211_xmit(sdata, sta, skb);
1472 rcu_read_unlock();
1473 }
1474
find_highest_prio_tid(unsigned long tids)1475 static int find_highest_prio_tid(unsigned long tids)
1476 {
1477 /* lower 3 TIDs aren't ordered perfectly */
1478 if (tids & 0xF8)
1479 return fls(tids) - 1;
1480 /* TID 0 is BE just like TID 3 */
1481 if (tids & BIT(0))
1482 return 0;
1483 return fls(tids) - 1;
1484 }
1485
1486 /* Indicates if the MORE_DATA bit should be set in the last
1487 * frame obtained by ieee80211_sta_ps_get_frames.
1488 * Note that driver_release_tids is relevant only if
1489 * reason = IEEE80211_FRAME_RELEASE_PSPOLL
1490 */
1491 static bool
ieee80211_sta_ps_more_data(struct sta_info * sta,u8 ignored_acs,enum ieee80211_frame_release_type reason,unsigned long driver_release_tids)1492 ieee80211_sta_ps_more_data(struct sta_info *sta, u8 ignored_acs,
1493 enum ieee80211_frame_release_type reason,
1494 unsigned long driver_release_tids)
1495 {
1496 int ac;
1497
1498 /* If the driver has data on more than one TID then
1499 * certainly there's more data if we release just a
1500 * single frame now (from a single TID). This will
1501 * only happen for PS-Poll.
1502 */
1503 if (reason == IEEE80211_FRAME_RELEASE_PSPOLL &&
1504 hweight16(driver_release_tids) > 1)
1505 return true;
1506
1507 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1508 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1509 continue;
1510
1511 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1512 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1513 return true;
1514 }
1515
1516 return false;
1517 }
1518
1519 static void
ieee80211_sta_ps_get_frames(struct sta_info * sta,int n_frames,u8 ignored_acs,enum ieee80211_frame_release_type reason,struct sk_buff_head * frames,unsigned long * driver_release_tids)1520 ieee80211_sta_ps_get_frames(struct sta_info *sta, int n_frames, u8 ignored_acs,
1521 enum ieee80211_frame_release_type reason,
1522 struct sk_buff_head *frames,
1523 unsigned long *driver_release_tids)
1524 {
1525 struct ieee80211_sub_if_data *sdata = sta->sdata;
1526 struct ieee80211_local *local = sdata->local;
1527 int ac;
1528
1529 /* Get response frame(s) and more data bit for the last one. */
1530 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1531 unsigned long tids;
1532
1533 if (ignored_acs & ieee80211_ac_to_qos_mask[ac])
1534 continue;
1535
1536 tids = ieee80211_tids_for_ac(ac);
1537
1538 /* if we already have frames from software, then we can't also
1539 * release from hardware queues
1540 */
1541 if (skb_queue_empty(frames)) {
1542 *driver_release_tids |=
1543 sta->driver_buffered_tids & tids;
1544 *driver_release_tids |= sta->txq_buffered_tids & tids;
1545 }
1546
1547 if (!*driver_release_tids) {
1548 struct sk_buff *skb;
1549
1550 while (n_frames > 0) {
1551 skb = skb_dequeue(&sta->tx_filtered[ac]);
1552 if (!skb) {
1553 skb = skb_dequeue(
1554 &sta->ps_tx_buf[ac]);
1555 if (skb)
1556 local->total_ps_buffered--;
1557 }
1558 if (!skb)
1559 break;
1560 n_frames--;
1561 __skb_queue_tail(frames, skb);
1562 }
1563 }
1564
1565 /* If we have more frames buffered on this AC, then abort the
1566 * loop since we can't send more data from other ACs before
1567 * the buffered frames from this.
1568 */
1569 if (!skb_queue_empty(&sta->tx_filtered[ac]) ||
1570 !skb_queue_empty(&sta->ps_tx_buf[ac]))
1571 break;
1572 }
1573 }
1574
1575 static void
ieee80211_sta_ps_deliver_response(struct sta_info * sta,int n_frames,u8 ignored_acs,enum ieee80211_frame_release_type reason)1576 ieee80211_sta_ps_deliver_response(struct sta_info *sta,
1577 int n_frames, u8 ignored_acs,
1578 enum ieee80211_frame_release_type reason)
1579 {
1580 struct ieee80211_sub_if_data *sdata = sta->sdata;
1581 struct ieee80211_local *local = sdata->local;
1582 unsigned long driver_release_tids = 0;
1583 struct sk_buff_head frames;
1584 bool more_data;
1585
1586 /* Service or PS-Poll period starts */
1587 set_sta_flag(sta, WLAN_STA_SP);
1588
1589 __skb_queue_head_init(&frames);
1590
1591 ieee80211_sta_ps_get_frames(sta, n_frames, ignored_acs, reason,
1592 &frames, &driver_release_tids);
1593
1594 more_data = ieee80211_sta_ps_more_data(sta, ignored_acs, reason, driver_release_tids);
1595
1596 if (driver_release_tids && reason == IEEE80211_FRAME_RELEASE_PSPOLL)
1597 driver_release_tids =
1598 BIT(find_highest_prio_tid(driver_release_tids));
1599
1600 if (skb_queue_empty(&frames) && !driver_release_tids) {
1601 int tid, ac;
1602
1603 /*
1604 * For PS-Poll, this can only happen due to a race condition
1605 * when we set the TIM bit and the station notices it, but
1606 * before it can poll for the frame we expire it.
1607 *
1608 * For uAPSD, this is said in the standard (11.2.1.5 h):
1609 * At each unscheduled SP for a non-AP STA, the AP shall
1610 * attempt to transmit at least one MSDU or MMPDU, but no
1611 * more than the value specified in the Max SP Length field
1612 * in the QoS Capability element from delivery-enabled ACs,
1613 * that are destined for the non-AP STA.
1614 *
1615 * Since we have no other MSDU/MMPDU, transmit a QoS null frame.
1616 */
1617
1618 /* This will evaluate to 1, 3, 5 or 7. */
1619 for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++)
1620 if (!(ignored_acs & ieee80211_ac_to_qos_mask[ac]))
1621 break;
1622 tid = 7 - 2 * ac;
1623
1624 ieee80211_send_null_response(sta, tid, reason, true, false);
1625 } else if (!driver_release_tids) {
1626 struct sk_buff_head pending;
1627 struct sk_buff *skb;
1628 int num = 0;
1629 u16 tids = 0;
1630 bool need_null = false;
1631
1632 skb_queue_head_init(&pending);
1633
1634 while ((skb = __skb_dequeue(&frames))) {
1635 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1636 struct ieee80211_hdr *hdr = (void *) skb->data;
1637 u8 *qoshdr = NULL;
1638
1639 num++;
1640
1641 /*
1642 * Tell TX path to send this frame even though the
1643 * STA may still remain is PS mode after this frame
1644 * exchange.
1645 */
1646 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
1647 info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE;
1648
1649 /*
1650 * Use MoreData flag to indicate whether there are
1651 * more buffered frames for this STA
1652 */
1653 if (more_data || !skb_queue_empty(&frames))
1654 hdr->frame_control |=
1655 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1656 else
1657 hdr->frame_control &=
1658 cpu_to_le16(~IEEE80211_FCTL_MOREDATA);
1659
1660 if (ieee80211_is_data_qos(hdr->frame_control) ||
1661 ieee80211_is_qos_nullfunc(hdr->frame_control))
1662 qoshdr = ieee80211_get_qos_ctl(hdr);
1663
1664 tids |= BIT(skb->priority);
1665
1666 __skb_queue_tail(&pending, skb);
1667
1668 /* end service period after last frame or add one */
1669 if (!skb_queue_empty(&frames))
1670 continue;
1671
1672 if (reason != IEEE80211_FRAME_RELEASE_UAPSD) {
1673 /* for PS-Poll, there's only one frame */
1674 info->flags |= IEEE80211_TX_STATUS_EOSP |
1675 IEEE80211_TX_CTL_REQ_TX_STATUS;
1676 break;
1677 }
1678
1679 /* For uAPSD, things are a bit more complicated. If the
1680 * last frame has a QoS header (i.e. is a QoS-data or
1681 * QoS-nulldata frame) then just set the EOSP bit there
1682 * and be done.
1683 * If the frame doesn't have a QoS header (which means
1684 * it should be a bufferable MMPDU) then we can't set
1685 * the EOSP bit in the QoS header; add a QoS-nulldata
1686 * frame to the list to send it after the MMPDU.
1687 *
1688 * Note that this code is only in the mac80211-release
1689 * code path, we assume that the driver will not buffer
1690 * anything but QoS-data frames, or if it does, will
1691 * create the QoS-nulldata frame by itself if needed.
1692 *
1693 * Cf. 802.11-2012 10.2.1.10 (c).
1694 */
1695 if (qoshdr) {
1696 *qoshdr |= IEEE80211_QOS_CTL_EOSP;
1697
1698 info->flags |= IEEE80211_TX_STATUS_EOSP |
1699 IEEE80211_TX_CTL_REQ_TX_STATUS;
1700 } else {
1701 /* The standard isn't completely clear on this
1702 * as it says the more-data bit should be set
1703 * if there are more BUs. The QoS-Null frame
1704 * we're about to send isn't buffered yet, we
1705 * only create it below, but let's pretend it
1706 * was buffered just in case some clients only
1707 * expect more-data=0 when eosp=1.
1708 */
1709 hdr->frame_control |=
1710 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
1711 need_null = true;
1712 num++;
1713 }
1714 break;
1715 }
1716
1717 drv_allow_buffered_frames(local, sta, tids, num,
1718 reason, more_data);
1719
1720 ieee80211_add_pending_skbs(local, &pending);
1721
1722 if (need_null)
1723 ieee80211_send_null_response(
1724 sta, find_highest_prio_tid(tids),
1725 reason, false, false);
1726
1727 sta_info_recalc_tim(sta);
1728 } else {
1729 int tid;
1730
1731 /*
1732 * We need to release a frame that is buffered somewhere in the
1733 * driver ... it'll have to handle that.
1734 * Note that the driver also has to check the number of frames
1735 * on the TIDs we're releasing from - if there are more than
1736 * n_frames it has to set the more-data bit (if we didn't ask
1737 * it to set it anyway due to other buffered frames); if there
1738 * are fewer than n_frames it has to make sure to adjust that
1739 * to allow the service period to end properly.
1740 */
1741 drv_release_buffered_frames(local, sta, driver_release_tids,
1742 n_frames, reason, more_data);
1743
1744 /*
1745 * Note that we don't recalculate the TIM bit here as it would
1746 * most likely have no effect at all unless the driver told us
1747 * that the TID(s) became empty before returning here from the
1748 * release function.
1749 * Either way, however, when the driver tells us that the TID(s)
1750 * became empty or we find that a txq became empty, we'll do the
1751 * TIM recalculation.
1752 */
1753
1754 if (!sta->sta.txq[0])
1755 return;
1756
1757 for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
1758 if (!sta->sta.txq[tid] ||
1759 !(driver_release_tids & BIT(tid)) ||
1760 txq_has_queue(sta->sta.txq[tid]))
1761 continue;
1762
1763 sta_info_recalc_tim(sta);
1764 break;
1765 }
1766 }
1767 }
1768
ieee80211_sta_ps_deliver_poll_response(struct sta_info * sta)1769 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta)
1770 {
1771 u8 ignore_for_response = sta->sta.uapsd_queues;
1772
1773 /*
1774 * If all ACs are delivery-enabled then we should reply
1775 * from any of them, if only some are enabled we reply
1776 * only from the non-enabled ones.
1777 */
1778 if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1)
1779 ignore_for_response = 0;
1780
1781 ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response,
1782 IEEE80211_FRAME_RELEASE_PSPOLL);
1783 }
1784
ieee80211_sta_ps_deliver_uapsd(struct sta_info * sta)1785 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta)
1786 {
1787 int n_frames = sta->sta.max_sp;
1788 u8 delivery_enabled = sta->sta.uapsd_queues;
1789
1790 /*
1791 * If we ever grow support for TSPEC this might happen if
1792 * the TSPEC update from hostapd comes in between a trigger
1793 * frame setting WLAN_STA_UAPSD in the RX path and this
1794 * actually getting called.
1795 */
1796 if (!delivery_enabled)
1797 return;
1798
1799 switch (sta->sta.max_sp) {
1800 case 1:
1801 n_frames = 2;
1802 break;
1803 case 2:
1804 n_frames = 4;
1805 break;
1806 case 3:
1807 n_frames = 6;
1808 break;
1809 case 0:
1810 /* XXX: what is a good value? */
1811 n_frames = 128;
1812 break;
1813 }
1814
1815 ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled,
1816 IEEE80211_FRAME_RELEASE_UAPSD);
1817 }
1818
ieee80211_sta_block_awake(struct ieee80211_hw * hw,struct ieee80211_sta * pubsta,bool block)1819 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
1820 struct ieee80211_sta *pubsta, bool block)
1821 {
1822 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1823
1824 trace_api_sta_block_awake(sta->local, pubsta, block);
1825
1826 if (block) {
1827 set_sta_flag(sta, WLAN_STA_PS_DRIVER);
1828 ieee80211_clear_fast_xmit(sta);
1829 return;
1830 }
1831
1832 if (!test_sta_flag(sta, WLAN_STA_PS_DRIVER))
1833 return;
1834
1835 if (!test_sta_flag(sta, WLAN_STA_PS_STA)) {
1836 set_sta_flag(sta, WLAN_STA_PS_DELIVER);
1837 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1838 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1839 } else if (test_sta_flag(sta, WLAN_STA_PSPOLL) ||
1840 test_sta_flag(sta, WLAN_STA_UAPSD)) {
1841 /* must be asleep in this case */
1842 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1843 ieee80211_queue_work(hw, &sta->drv_deliver_wk);
1844 } else {
1845 clear_sta_flag(sta, WLAN_STA_PS_DRIVER);
1846 ieee80211_check_fast_xmit(sta);
1847 }
1848 }
1849 EXPORT_SYMBOL(ieee80211_sta_block_awake);
1850
ieee80211_sta_eosp(struct ieee80211_sta * pubsta)1851 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta)
1852 {
1853 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1854 struct ieee80211_local *local = sta->local;
1855
1856 trace_api_eosp(local, pubsta);
1857
1858 clear_sta_flag(sta, WLAN_STA_SP);
1859 }
1860 EXPORT_SYMBOL(ieee80211_sta_eosp);
1861
ieee80211_send_eosp_nullfunc(struct ieee80211_sta * pubsta,int tid)1862 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid)
1863 {
1864 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1865 enum ieee80211_frame_release_type reason;
1866 bool more_data;
1867
1868 trace_api_send_eosp_nullfunc(sta->local, pubsta, tid);
1869
1870 reason = IEEE80211_FRAME_RELEASE_UAPSD;
1871 more_data = ieee80211_sta_ps_more_data(sta, ~sta->sta.uapsd_queues,
1872 reason, 0);
1873
1874 ieee80211_send_null_response(sta, tid, reason, false, more_data);
1875 }
1876 EXPORT_SYMBOL(ieee80211_send_eosp_nullfunc);
1877
ieee80211_sta_set_buffered(struct ieee80211_sta * pubsta,u8 tid,bool buffered)1878 void ieee80211_sta_set_buffered(struct ieee80211_sta *pubsta,
1879 u8 tid, bool buffered)
1880 {
1881 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1882
1883 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
1884 return;
1885
1886 trace_api_sta_set_buffered(sta->local, pubsta, tid, buffered);
1887
1888 if (buffered)
1889 set_bit(tid, &sta->driver_buffered_tids);
1890 else
1891 clear_bit(tid, &sta->driver_buffered_tids);
1892
1893 sta_info_recalc_tim(sta);
1894 }
1895 EXPORT_SYMBOL(ieee80211_sta_set_buffered);
1896
ieee80211_register_airtime(struct ieee80211_txq * txq,u32 tx_airtime,u32 rx_airtime)1897 void ieee80211_register_airtime(struct ieee80211_txq *txq,
1898 u32 tx_airtime, u32 rx_airtime)
1899 {
1900 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
1901 struct ieee80211_local *local = sdata->local;
1902 u64 weight_sum, weight_sum_reciprocal;
1903 struct airtime_sched_info *air_sched;
1904 struct airtime_info *air_info;
1905 u32 airtime = 0;
1906
1907 air_sched = &local->airtime[txq->ac];
1908 air_info = to_airtime_info(txq);
1909
1910 if (local->airtime_flags & AIRTIME_USE_TX)
1911 airtime += tx_airtime;
1912 if (local->airtime_flags & AIRTIME_USE_RX)
1913 airtime += rx_airtime;
1914
1915 /* Weights scale so the unit weight is 256 */
1916 airtime <<= 8;
1917
1918 spin_lock_bh(&air_sched->lock);
1919
1920 air_info->tx_airtime += tx_airtime;
1921 air_info->rx_airtime += rx_airtime;
1922
1923 if (air_sched->weight_sum) {
1924 weight_sum = air_sched->weight_sum;
1925 weight_sum_reciprocal = air_sched->weight_sum_reciprocal;
1926 } else {
1927 weight_sum = air_info->weight;
1928 weight_sum_reciprocal = air_info->weight_reciprocal;
1929 }
1930
1931 /* Round the calculation of global vt */
1932 air_sched->v_t += (u64)((airtime + (weight_sum >> 1)) *
1933 weight_sum_reciprocal) >> IEEE80211_RECIPROCAL_SHIFT_64;
1934 air_info->v_t += (u32)((airtime + (air_info->weight >> 1)) *
1935 air_info->weight_reciprocal) >> IEEE80211_RECIPROCAL_SHIFT_32;
1936 ieee80211_resort_txq(&local->hw, txq);
1937
1938 spin_unlock_bh(&air_sched->lock);
1939 }
1940
ieee80211_sta_register_airtime(struct ieee80211_sta * pubsta,u8 tid,u32 tx_airtime,u32 rx_airtime)1941 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
1942 u32 tx_airtime, u32 rx_airtime)
1943 {
1944 struct ieee80211_txq *txq = pubsta->txq[tid];
1945
1946 if (!txq)
1947 return;
1948
1949 ieee80211_register_airtime(txq, tx_airtime, rx_airtime);
1950 }
1951 EXPORT_SYMBOL(ieee80211_sta_register_airtime);
1952
ieee80211_sta_update_pending_airtime(struct ieee80211_local * local,struct sta_info * sta,u8 ac,u16 tx_airtime,bool tx_completed)1953 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
1954 struct sta_info *sta, u8 ac,
1955 u16 tx_airtime, bool tx_completed)
1956 {
1957 int tx_pending;
1958
1959 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
1960 return;
1961
1962 if (!tx_completed) {
1963 if (sta)
1964 atomic_add(tx_airtime,
1965 &sta->airtime[ac].aql_tx_pending);
1966
1967 atomic_add(tx_airtime, &local->aql_total_pending_airtime);
1968 return;
1969 }
1970
1971 if (sta) {
1972 tx_pending = atomic_sub_return(tx_airtime,
1973 &sta->airtime[ac].aql_tx_pending);
1974 if (tx_pending < 0)
1975 atomic_cmpxchg(&sta->airtime[ac].aql_tx_pending,
1976 tx_pending, 0);
1977 }
1978
1979 tx_pending = atomic_sub_return(tx_airtime,
1980 &local->aql_total_pending_airtime);
1981 if (WARN_ONCE(tx_pending < 0,
1982 "Device %s AC %d pending airtime underflow: %u, %u",
1983 wiphy_name(local->hw.wiphy), ac, tx_pending,
1984 tx_airtime))
1985 atomic_cmpxchg(&local->aql_total_pending_airtime,
1986 tx_pending, 0);
1987 }
1988
sta_info_move_state(struct sta_info * sta,enum ieee80211_sta_state new_state)1989 int sta_info_move_state(struct sta_info *sta,
1990 enum ieee80211_sta_state new_state)
1991 {
1992 might_sleep();
1993
1994 if (sta->sta_state == new_state)
1995 return 0;
1996
1997 /* check allowed transitions first */
1998
1999 switch (new_state) {
2000 case IEEE80211_STA_NONE:
2001 if (sta->sta_state != IEEE80211_STA_AUTH)
2002 return -EINVAL;
2003 break;
2004 case IEEE80211_STA_AUTH:
2005 if (sta->sta_state != IEEE80211_STA_NONE &&
2006 sta->sta_state != IEEE80211_STA_ASSOC)
2007 return -EINVAL;
2008 break;
2009 case IEEE80211_STA_ASSOC:
2010 if (sta->sta_state != IEEE80211_STA_AUTH &&
2011 sta->sta_state != IEEE80211_STA_AUTHORIZED)
2012 return -EINVAL;
2013 break;
2014 case IEEE80211_STA_AUTHORIZED:
2015 if (sta->sta_state != IEEE80211_STA_ASSOC)
2016 return -EINVAL;
2017 break;
2018 default:
2019 WARN(1, "invalid state %d", new_state);
2020 return -EINVAL;
2021 }
2022
2023 sta_dbg(sta->sdata, "moving STA %pM to state %d\n",
2024 sta->sta.addr, new_state);
2025
2026 /*
2027 * notify the driver before the actual changes so it can
2028 * fail the transition
2029 */
2030 if (test_sta_flag(sta, WLAN_STA_INSERTED)) {
2031 int err = drv_sta_state(sta->local, sta->sdata, sta,
2032 sta->sta_state, new_state);
2033 if (err)
2034 return err;
2035 }
2036
2037 /* reflect the change in all state variables */
2038
2039 switch (new_state) {
2040 case IEEE80211_STA_NONE:
2041 if (sta->sta_state == IEEE80211_STA_AUTH)
2042 clear_bit(WLAN_STA_AUTH, &sta->_flags);
2043 break;
2044 case IEEE80211_STA_AUTH:
2045 if (sta->sta_state == IEEE80211_STA_NONE) {
2046 set_bit(WLAN_STA_AUTH, &sta->_flags);
2047 } else if (sta->sta_state == IEEE80211_STA_ASSOC) {
2048 clear_bit(WLAN_STA_ASSOC, &sta->_flags);
2049 ieee80211_recalc_min_chandef(sta->sdata);
2050 if (!sta->sta.support_p2p_ps)
2051 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2052 }
2053 break;
2054 case IEEE80211_STA_ASSOC:
2055 if (sta->sta_state == IEEE80211_STA_AUTH) {
2056 set_bit(WLAN_STA_ASSOC, &sta->_flags);
2057 sta->assoc_at = ktime_get_boottime_ns();
2058 ieee80211_recalc_min_chandef(sta->sdata);
2059 if (!sta->sta.support_p2p_ps)
2060 ieee80211_recalc_p2p_go_ps_allowed(sta->sdata);
2061 } else if (sta->sta_state == IEEE80211_STA_AUTHORIZED) {
2062 ieee80211_vif_dec_num_mcast(sta->sdata);
2063 clear_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2064 ieee80211_clear_fast_xmit(sta);
2065 ieee80211_clear_fast_rx(sta);
2066 }
2067 break;
2068 case IEEE80211_STA_AUTHORIZED:
2069 if (sta->sta_state == IEEE80211_STA_ASSOC) {
2070 ieee80211_vif_inc_num_mcast(sta->sdata);
2071 set_bit(WLAN_STA_AUTHORIZED, &sta->_flags);
2072 ieee80211_check_fast_xmit(sta);
2073 ieee80211_check_fast_rx(sta);
2074 }
2075 if (sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2076 sta->sdata->vif.type == NL80211_IFTYPE_AP)
2077 cfg80211_send_layer2_update(sta->sdata->dev,
2078 sta->sta.addr);
2079 break;
2080 default:
2081 break;
2082 }
2083
2084 sta->sta_state = new_state;
2085
2086 return 0;
2087 }
2088
sta_info_tx_streams(struct sta_info * sta)2089 u8 sta_info_tx_streams(struct sta_info *sta)
2090 {
2091 struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
2092 u8 rx_streams;
2093
2094 if (!sta->sta.ht_cap.ht_supported)
2095 return 1;
2096
2097 if (sta->sta.vht_cap.vht_supported) {
2098 int i;
2099 u16 tx_mcs_map =
2100 le16_to_cpu(sta->sta.vht_cap.vht_mcs.tx_mcs_map);
2101
2102 for (i = 7; i >= 0; i--)
2103 if ((tx_mcs_map & (0x3 << (i * 2))) !=
2104 IEEE80211_VHT_MCS_NOT_SUPPORTED)
2105 return i + 1;
2106 }
2107
2108 if (ht_cap->mcs.rx_mask[3])
2109 rx_streams = 4;
2110 else if (ht_cap->mcs.rx_mask[2])
2111 rx_streams = 3;
2112 else if (ht_cap->mcs.rx_mask[1])
2113 rx_streams = 2;
2114 else
2115 rx_streams = 1;
2116
2117 if (!(ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_RX_DIFF))
2118 return rx_streams;
2119
2120 return ((ht_cap->mcs.tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2121 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
2122 }
2123
2124 static struct ieee80211_sta_rx_stats *
sta_get_last_rx_stats(struct sta_info * sta)2125 sta_get_last_rx_stats(struct sta_info *sta)
2126 {
2127 struct ieee80211_sta_rx_stats *stats = &sta->rx_stats;
2128 int cpu;
2129
2130 if (!sta->pcpu_rx_stats)
2131 return stats;
2132
2133 for_each_possible_cpu(cpu) {
2134 struct ieee80211_sta_rx_stats *cpustats;
2135
2136 cpustats = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2137
2138 if (time_after(cpustats->last_rx, stats->last_rx))
2139 stats = cpustats;
2140 }
2141
2142 return stats;
2143 }
2144
sta_stats_decode_rate(struct ieee80211_local * local,u32 rate,struct rate_info * rinfo)2145 static void sta_stats_decode_rate(struct ieee80211_local *local, u32 rate,
2146 struct rate_info *rinfo)
2147 {
2148 rinfo->bw = STA_STATS_GET(BW, rate);
2149
2150 switch (STA_STATS_GET(TYPE, rate)) {
2151 case STA_STATS_RATE_TYPE_VHT:
2152 rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;
2153 rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);
2154 rinfo->nss = STA_STATS_GET(VHT_NSS, rate);
2155 if (STA_STATS_GET(SGI, rate))
2156 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2157 break;
2158 case STA_STATS_RATE_TYPE_HT:
2159 rinfo->flags = RATE_INFO_FLAGS_MCS;
2160 rinfo->mcs = STA_STATS_GET(HT_MCS, rate);
2161 if (STA_STATS_GET(SGI, rate))
2162 rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
2163 break;
2164 case STA_STATS_RATE_TYPE_LEGACY: {
2165 struct ieee80211_supported_band *sband;
2166 u16 brate;
2167 unsigned int shift;
2168 int band = STA_STATS_GET(LEGACY_BAND, rate);
2169 int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);
2170
2171 sband = local->hw.wiphy->bands[band];
2172
2173 if (WARN_ON_ONCE(!sband->bitrates))
2174 break;
2175
2176 brate = sband->bitrates[rate_idx].bitrate;
2177 if (rinfo->bw == RATE_INFO_BW_5)
2178 shift = 2;
2179 else if (rinfo->bw == RATE_INFO_BW_10)
2180 shift = 1;
2181 else
2182 shift = 0;
2183 rinfo->legacy = DIV_ROUND_UP(brate, 1 << shift);
2184 break;
2185 }
2186 case STA_STATS_RATE_TYPE_HE:
2187 rinfo->flags = RATE_INFO_FLAGS_HE_MCS;
2188 rinfo->mcs = STA_STATS_GET(HE_MCS, rate);
2189 rinfo->nss = STA_STATS_GET(HE_NSS, rate);
2190 rinfo->he_gi = STA_STATS_GET(HE_GI, rate);
2191 rinfo->he_ru_alloc = STA_STATS_GET(HE_RU, rate);
2192 rinfo->he_dcm = STA_STATS_GET(HE_DCM, rate);
2193 break;
2194 }
2195 }
2196
sta_set_rate_info_rx(struct sta_info * sta,struct rate_info * rinfo)2197 static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)
2198 {
2199 u16 rate = READ_ONCE(sta_get_last_rx_stats(sta)->last_rate);
2200
2201 if (rate == STA_STATS_RATE_INVALID)
2202 return -EINVAL;
2203
2204 sta_stats_decode_rate(sta->local, rate, rinfo);
2205 return 0;
2206 }
2207
sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats * rxstats,int tid)2208 static inline u64 sta_get_tidstats_msdu(struct ieee80211_sta_rx_stats *rxstats,
2209 int tid)
2210 {
2211 unsigned int start;
2212 u64 value;
2213
2214 do {
2215 start = u64_stats_fetch_begin(&rxstats->syncp);
2216 value = rxstats->msdu[tid];
2217 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2218
2219 return value;
2220 }
2221
sta_set_tidstats(struct sta_info * sta,struct cfg80211_tid_stats * tidstats,int tid)2222 static void sta_set_tidstats(struct sta_info *sta,
2223 struct cfg80211_tid_stats *tidstats,
2224 int tid)
2225 {
2226 struct ieee80211_local *local = sta->local;
2227 int cpu;
2228
2229 if (!(tidstats->filled & BIT(NL80211_TID_STATS_RX_MSDU))) {
2230 tidstats->rx_msdu += sta_get_tidstats_msdu(&sta->rx_stats, tid);
2231
2232 if (sta->pcpu_rx_stats) {
2233 for_each_possible_cpu(cpu) {
2234 struct ieee80211_sta_rx_stats *cpurxs;
2235
2236 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2237 tidstats->rx_msdu +=
2238 sta_get_tidstats_msdu(cpurxs, tid);
2239 }
2240 }
2241
2242 tidstats->filled |= BIT(NL80211_TID_STATS_RX_MSDU);
2243 }
2244
2245 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU))) {
2246 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU);
2247 tidstats->tx_msdu = sta->tx_stats.msdu[tid];
2248 }
2249
2250 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_RETRIES)) &&
2251 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2252 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_RETRIES);
2253 tidstats->tx_msdu_retries = sta->status_stats.msdu_retries[tid];
2254 }
2255
2256 if (!(tidstats->filled & BIT(NL80211_TID_STATS_TX_MSDU_FAILED)) &&
2257 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
2258 tidstats->filled |= BIT(NL80211_TID_STATS_TX_MSDU_FAILED);
2259 tidstats->tx_msdu_failed = sta->status_stats.msdu_failed[tid];
2260 }
2261
2262 if (local->ops->wake_tx_queue && tid < IEEE80211_NUM_TIDS) {
2263 spin_lock_bh(&local->fq.lock);
2264 rcu_read_lock();
2265
2266 tidstats->filled |= BIT(NL80211_TID_STATS_TXQ_STATS);
2267 ieee80211_fill_txq_stats(&tidstats->txq_stats,
2268 to_txq_info(sta->sta.txq[tid]));
2269
2270 rcu_read_unlock();
2271 spin_unlock_bh(&local->fq.lock);
2272 }
2273 }
2274
sta_get_stats_bytes(struct ieee80211_sta_rx_stats * rxstats)2275 static inline u64 sta_get_stats_bytes(struct ieee80211_sta_rx_stats *rxstats)
2276 {
2277 unsigned int start;
2278 u64 value;
2279
2280 do {
2281 start = u64_stats_fetch_begin(&rxstats->syncp);
2282 value = rxstats->bytes;
2283 } while (u64_stats_fetch_retry(&rxstats->syncp, start));
2284
2285 return value;
2286 }
2287
sta_set_sinfo(struct sta_info * sta,struct station_info * sinfo,bool tidstats)2288 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
2289 bool tidstats)
2290 {
2291 struct ieee80211_sub_if_data *sdata = sta->sdata;
2292 struct ieee80211_local *local = sdata->local;
2293 u32 thr = 0;
2294 int i, ac, cpu;
2295 struct ieee80211_sta_rx_stats *last_rxstats;
2296
2297 last_rxstats = sta_get_last_rx_stats(sta);
2298
2299 sinfo->generation = sdata->local->sta_generation;
2300
2301 /* do before driver, so beacon filtering drivers have a
2302 * chance to e.g. just add the number of filtered beacons
2303 * (or just modify the value entirely, of course)
2304 */
2305 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2306 sinfo->rx_beacon = sdata->u.mgd.count_beacon_signal;
2307
2308 drv_sta_statistics(local, sdata, &sta->sta, sinfo);
2309 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_INACTIVE_TIME) |
2310 BIT_ULL(NL80211_STA_INFO_STA_FLAGS) |
2311 BIT_ULL(NL80211_STA_INFO_BSS_PARAM) |
2312 BIT_ULL(NL80211_STA_INFO_CONNECTED_TIME) |
2313 BIT_ULL(NL80211_STA_INFO_ASSOC_AT_BOOTTIME) |
2314 BIT_ULL(NL80211_STA_INFO_RX_DROP_MISC);
2315
2316 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2317 sinfo->beacon_loss_count = sdata->u.mgd.beacon_loss_count;
2318 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_LOSS);
2319 }
2320
2321 sinfo->connected_time = ktime_get_seconds() - sta->last_connected;
2322 sinfo->assoc_at = sta->assoc_at;
2323 sinfo->inactive_time =
2324 jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));
2325
2326 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES64) |
2327 BIT_ULL(NL80211_STA_INFO_TX_BYTES)))) {
2328 sinfo->tx_bytes = 0;
2329 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2330 sinfo->tx_bytes += sta->tx_stats.bytes[ac];
2331 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BYTES64);
2332 }
2333
2334 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_PACKETS))) {
2335 sinfo->tx_packets = 0;
2336 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2337 sinfo->tx_packets += sta->tx_stats.packets[ac];
2338 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_PACKETS);
2339 }
2340
2341 if (!(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES64) |
2342 BIT_ULL(NL80211_STA_INFO_RX_BYTES)))) {
2343 sinfo->rx_bytes += sta_get_stats_bytes(&sta->rx_stats);
2344
2345 if (sta->pcpu_rx_stats) {
2346 for_each_possible_cpu(cpu) {
2347 struct ieee80211_sta_rx_stats *cpurxs;
2348
2349 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2350 sinfo->rx_bytes += sta_get_stats_bytes(cpurxs);
2351 }
2352 }
2353
2354 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BYTES64);
2355 }
2356
2357 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_PACKETS))) {
2358 sinfo->rx_packets = sta->rx_stats.packets;
2359 if (sta->pcpu_rx_stats) {
2360 for_each_possible_cpu(cpu) {
2361 struct ieee80211_sta_rx_stats *cpurxs;
2362
2363 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2364 sinfo->rx_packets += cpurxs->packets;
2365 }
2366 }
2367 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_PACKETS);
2368 }
2369
2370 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_RETRIES))) {
2371 sinfo->tx_retries = sta->status_stats.retry_count;
2372 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
2373 }
2374
2375 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_FAILED))) {
2376 sinfo->tx_failed = sta->status_stats.retry_failed;
2377 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_FAILED);
2378 }
2379
2380 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_DURATION))) {
2381 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2382 sinfo->rx_duration += sta->airtime[ac].rx_airtime;
2383 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_DURATION);
2384 }
2385
2386 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_DURATION))) {
2387 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
2388 sinfo->tx_duration += sta->airtime[ac].tx_airtime;
2389 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
2390 }
2391
2392 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT))) {
2393 sinfo->airtime_weight = sta->airtime[0].weight;
2394 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_WEIGHT);
2395 }
2396
2397 sinfo->rx_dropped_misc = sta->rx_stats.dropped;
2398 if (sta->pcpu_rx_stats) {
2399 for_each_possible_cpu(cpu) {
2400 struct ieee80211_sta_rx_stats *cpurxs;
2401
2402 cpurxs = per_cpu_ptr(sta->pcpu_rx_stats, cpu);
2403 sinfo->rx_dropped_misc += cpurxs->dropped;
2404 }
2405 }
2406
2407 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2408 !(sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)) {
2409 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_BEACON_RX) |
2410 BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
2411 sinfo->rx_beacon_signal_avg = ieee80211_ave_rssi(&sdata->vif);
2412 }
2413
2414 if (ieee80211_hw_check(&sta->local->hw, SIGNAL_DBM) ||
2415 ieee80211_hw_check(&sta->local->hw, SIGNAL_UNSPEC)) {
2416 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL))) {
2417 sinfo->signal = (s8)last_rxstats->last_signal;
2418 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2419 }
2420
2421 if (!sta->pcpu_rx_stats &&
2422 !(sinfo->filled & BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG))) {
2423 sinfo->signal_avg =
2424 -ewma_signal_read(&sta->rx_stats_avg.signal);
2425 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL_AVG);
2426 }
2427 }
2428
2429 /* for the average - if pcpu_rx_stats isn't set - rxstats must point to
2430 * the sta->rx_stats struct, so the check here is fine with and without
2431 * pcpu statistics
2432 */
2433 if (last_rxstats->chains &&
2434 !(sinfo->filled & (BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL) |
2435 BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)))) {
2436 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL);
2437 if (!sta->pcpu_rx_stats)
2438 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG);
2439
2440 sinfo->chains = last_rxstats->chains;
2441
2442 for (i = 0; i < ARRAY_SIZE(sinfo->chain_signal); i++) {
2443 sinfo->chain_signal[i] =
2444 last_rxstats->chain_signal_last[i];
2445 sinfo->chain_signal_avg[i] =
2446 -ewma_signal_read(&sta->rx_stats_avg.chain_signal[i]);
2447 }
2448 }
2449
2450 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE))) {
2451 sta_set_rate_info_tx(sta, &sta->tx_stats.last_rate,
2452 &sinfo->txrate);
2453 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2454 }
2455
2456 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE))) {
2457 if (sta_set_rate_info_rx(sta, &sinfo->rxrate) == 0)
2458 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_RX_BITRATE);
2459 }
2460
2461 if (tidstats && !cfg80211_sinfo_alloc_tid_stats(sinfo, GFP_KERNEL)) {
2462 for (i = 0; i < IEEE80211_NUM_TIDS + 1; i++)
2463 sta_set_tidstats(sta, &sinfo->pertid[i], i);
2464 }
2465
2466 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2467 #ifdef CONFIG_MAC80211_MESH
2468 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_LLID) |
2469 BIT_ULL(NL80211_STA_INFO_PLID) |
2470 BIT_ULL(NL80211_STA_INFO_PLINK_STATE) |
2471 BIT_ULL(NL80211_STA_INFO_LOCAL_PM) |
2472 BIT_ULL(NL80211_STA_INFO_PEER_PM) |
2473 BIT_ULL(NL80211_STA_INFO_NONPEER_PM) |
2474 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_GATE) |
2475 BIT_ULL(NL80211_STA_INFO_CONNECTED_TO_AS);
2476
2477 sinfo->llid = sta->mesh->llid;
2478 sinfo->plid = sta->mesh->plid;
2479 sinfo->plink_state = sta->mesh->plink_state;
2480 if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
2481 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_T_OFFSET);
2482 sinfo->t_offset = sta->mesh->t_offset;
2483 }
2484 sinfo->local_pm = sta->mesh->local_pm;
2485 sinfo->peer_pm = sta->mesh->peer_pm;
2486 sinfo->nonpeer_pm = sta->mesh->nonpeer_pm;
2487 sinfo->connected_to_gate = sta->mesh->connected_to_gate;
2488 sinfo->connected_to_as = sta->mesh->connected_to_as;
2489 #endif
2490 }
2491
2492 sinfo->bss_param.flags = 0;
2493 if (sdata->vif.bss_conf.use_cts_prot)
2494 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
2495 if (sdata->vif.bss_conf.use_short_preamble)
2496 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
2497 if (sdata->vif.bss_conf.use_short_slot)
2498 sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
2499 sinfo->bss_param.dtim_period = sdata->vif.bss_conf.dtim_period;
2500 sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;
2501
2502 sinfo->sta_flags.set = 0;
2503 sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2504 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2505 BIT(NL80211_STA_FLAG_WME) |
2506 BIT(NL80211_STA_FLAG_MFP) |
2507 BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2508 BIT(NL80211_STA_FLAG_ASSOCIATED) |
2509 BIT(NL80211_STA_FLAG_TDLS_PEER);
2510 if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2511 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
2512 if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
2513 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
2514 if (sta->sta.wme)
2515 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
2516 if (test_sta_flag(sta, WLAN_STA_MFP))
2517 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
2518 if (test_sta_flag(sta, WLAN_STA_AUTH))
2519 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
2520 if (test_sta_flag(sta, WLAN_STA_ASSOC))
2521 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
2522 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
2523 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
2524
2525 thr = sta_get_expected_throughput(sta);
2526
2527 if (thr != 0) {
2528 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
2529 sinfo->expected_throughput = thr;
2530 }
2531
2532 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL)) &&
2533 sta->status_stats.ack_signal_filled) {
2534 sinfo->ack_signal = sta->status_stats.last_ack_signal;
2535 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL);
2536 }
2537
2538 if (!(sinfo->filled & BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG)) &&
2539 sta->status_stats.ack_signal_filled) {
2540 sinfo->avg_ack_signal =
2541 -(s8)ewma_avg_signal_read(
2542 &sta->status_stats.avg_ack_signal);
2543 sinfo->filled |=
2544 BIT_ULL(NL80211_STA_INFO_ACK_SIGNAL_AVG);
2545 }
2546
2547 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2548 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_AIRTIME_LINK_METRIC);
2549 sinfo->airtime_link_metric =
2550 airtime_link_metric_get(local, sta);
2551 }
2552 }
2553
sta_get_expected_throughput(struct sta_info * sta)2554 u32 sta_get_expected_throughput(struct sta_info *sta)
2555 {
2556 struct ieee80211_sub_if_data *sdata = sta->sdata;
2557 struct ieee80211_local *local = sdata->local;
2558 struct rate_control_ref *ref = NULL;
2559 u32 thr = 0;
2560
2561 if (test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
2562 ref = local->rate_ctrl;
2563
2564 /* check if the driver has a SW RC implementation */
2565 if (ref && ref->ops->get_expected_throughput)
2566 thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
2567 else
2568 thr = drv_get_expected_throughput(local, sta);
2569
2570 return thr;
2571 }
2572
ieee80211_sta_last_active(struct sta_info * sta)2573 unsigned long ieee80211_sta_last_active(struct sta_info *sta)
2574 {
2575 struct ieee80211_sta_rx_stats *stats = sta_get_last_rx_stats(sta);
2576
2577 if (!sta->status_stats.last_ack ||
2578 time_after(stats->last_rx, sta->status_stats.last_ack))
2579 return stats->last_rx;
2580 return sta->status_stats.last_ack;
2581 }
2582
sta_update_codel_params(struct sta_info * sta,u32 thr)2583 static void sta_update_codel_params(struct sta_info *sta, u32 thr)
2584 {
2585 if (!sta->sdata->local->ops->wake_tx_queue)
2586 return;
2587
2588 if (thr && thr < STA_SLOW_THRESHOLD * sta->local->num_sta) {
2589 sta->cparams.target = MS2TIME(50);
2590 sta->cparams.interval = MS2TIME(300);
2591 sta->cparams.ecn = false;
2592 } else {
2593 sta->cparams.target = MS2TIME(20);
2594 sta->cparams.interval = MS2TIME(100);
2595 sta->cparams.ecn = true;
2596 }
2597 }
2598
ieee80211_sta_set_expected_throughput(struct ieee80211_sta * pubsta,u32 thr)2599 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
2600 u32 thr)
2601 {
2602 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
2603
2604 sta_update_codel_params(sta, thr);
2605 }
2606