2 * Copyright 2002-2005, Devicescape Software, Inc.
3 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
13 #include <linux/list.h>
14 #include <linux/types.h>
15 #include <linux/if_ether.h>
16 #include <linux/workqueue.h>
17 #include <linux/average.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rhashtable.h>
23 * enum ieee80211_sta_info_flags - Stations flags
25 * These flags are used with &struct sta_info's @flags member, but
26 * only indirectly with set_sta_flag() and friends.
28 * @WLAN_STA_AUTH: Station is authenticated.
29 * @WLAN_STA_ASSOC: Station is associated.
30 * @WLAN_STA_PS_STA: Station is in power-save mode
31 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
32 * This bit is always checked so needs to be enabled for all stations
33 * when virtual port control is not in use.
34 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
36 * @WLAN_STA_WDS: Station is one of our WDS peers.
37 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
38 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
39 * frame to this station is transmitted.
40 * @WLAN_STA_MFP: Management frame protection is used with this STA.
41 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
42 * during suspend/resume and station removal.
43 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
44 * power-save mode logically to flush frames that might still
46 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
47 * station in power-save mode, reply when the driver unblocks.
48 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
49 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
50 * packets. This means the link is enabled.
51 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
53 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
54 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
56 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
57 * the BSS base channel.
58 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
59 * keeping station in power-save mode, reply when the driver
60 * unblocks the station.
61 * @WLAN_STA_SP: Station is in a service period, so don't try to
62 * reply to other uAPSD trigger frames or PS-Poll.
63 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
64 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
65 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
66 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
67 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
68 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
69 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
70 * until pending frames are delivered
72 enum ieee80211_sta_info_flags {
77 WLAN_STA_SHORT_PREAMBLE,
79 WLAN_STA_CLEAR_PS_FILT,
85 WLAN_STA_TDLS_PEER_AUTH,
86 WLAN_STA_TDLS_INITIATOR,
87 WLAN_STA_TDLS_CHAN_SWITCH,
88 WLAN_STA_TDLS_OFF_CHANNEL,
89 WLAN_STA_TDLS_WIDER_BW,
94 WLAN_STA_RATE_CONTROL,
95 WLAN_STA_TOFFSET_KNOWN,
97 WLAN_STA_MPSP_RECIPIENT,
101 #define ADDBA_RESP_INTERVAL HZ
102 #define HT_AGG_MAX_RETRIES 15
103 #define HT_AGG_BURST_RETRIES 3
104 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
106 #define HT_AGG_STATE_DRV_READY 0
107 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
108 #define HT_AGG_STATE_OPERATIONAL 2
109 #define HT_AGG_STATE_STOPPING 3
110 #define HT_AGG_STATE_WANT_START 4
111 #define HT_AGG_STATE_WANT_STOP 5
113 enum ieee80211_agg_stop_reason {
115 AGG_STOP_LOCAL_REQUEST,
116 AGG_STOP_PEER_REQUEST,
117 AGG_STOP_DESTROY_STA,
121 * struct tid_ampdu_tx - TID aggregation information (Tx).
123 * @rcu_head: rcu head for freeing structure
124 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
125 * @addba_resp_timer: timer for peer's response to addba request
126 * @pending: pending frames queue -- use sta's spinlock to protect
127 * @dialog_token: dialog token for aggregation session
128 * @timeout: session timeout value to be filled in ADDBA requests
129 * @state: session state (see above)
130 * @last_tx: jiffies of last tx activity
131 * @stop_initiator: initiator of a session stop
132 * @tx_stop: TX DelBA frame when stopping
133 * @buf_size: reorder buffer size at receiver
134 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
135 * @bar_pending: BAR needs to be re-sent
137 * This structure's lifetime is managed by RCU, assignments to
138 * the array holding it must hold the aggregation mutex.
140 * The TX path can access it under RCU lock-free if, and
141 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
142 * set. Otherwise, the TX path must also acquire the spinlock
143 * and re-check the state, see comments in the tx code
146 struct tid_ampdu_tx {
147 struct rcu_head rcu_head;
148 struct timer_list session_timer;
149 struct timer_list addba_resp_timer;
150 struct sk_buff_head pending;
152 unsigned long last_tx;
164 * struct tid_ampdu_rx - TID aggregation information (Rx).
166 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
167 * A-MSDU with individually reported subframes.
168 * @reorder_time: jiffies when skb was added
169 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
170 * @reorder_timer: releases expired frames from the reorder buffer.
171 * @last_rx: jiffies of last rx activity
172 * @head_seq_num: head sequence number in reordering buffer.
173 * @stored_mpdu_num: number of MPDUs in reordering buffer
174 * @ssn: Starting Sequence Number expected to be aggregated.
175 * @buf_size: buffer size for incoming A-MPDUs
176 * @timeout: reset timer value (in TUs).
177 * @dialog_token: dialog token for aggregation session
178 * @rcu_head: RCU head used for freeing this struct
179 * @reorder_lock: serializes access to reorder buffer, see below.
180 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
182 * @removed: this session is removed (but might have been found due to RCU)
184 * This structure's lifetime is managed by RCU, assignments to
185 * the array holding it must hold the aggregation mutex.
187 * The @reorder_lock is used to protect the members of this
188 * struct, except for @timeout, @buf_size and @dialog_token,
189 * which are constant across the lifetime of the struct (the
190 * dialog token being used only for debugging).
192 struct tid_ampdu_rx {
193 struct rcu_head rcu_head;
194 spinlock_t reorder_lock;
195 struct sk_buff_head *reorder_buf;
196 unsigned long *reorder_time;
197 struct timer_list session_timer;
198 struct timer_list reorder_timer;
199 unsigned long last_rx;
211 * struct sta_ampdu_mlme - STA aggregation information.
213 * @tid_rx: aggregation info for Rx per TID -- RCU protected
214 * @tid_tx: aggregation info for Tx per TID
215 * @tid_start_tx: sessions where start was requested
216 * @addba_req_num: number of times addBA request has been sent.
217 * @last_addba_req_time: timestamp of the last addBA request.
218 * @dialog_token_allocator: dialog token enumerator for each new session;
219 * @work: work struct for starting/stopping aggregation
220 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
221 * RX timer expired until the work for it runs
222 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
223 * driver requested to close until the work for it runs
224 * @mtx: mutex to protect all TX data (except non-NULL assignments
225 * to tid_tx[idx], which are protected by the sta spinlock)
226 * tid_start_tx is also protected by sta->lock.
228 struct sta_ampdu_mlme {
231 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
232 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
233 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
235 struct work_struct work;
236 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
237 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
238 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
239 u8 addba_req_num[IEEE80211_NUM_TIDS];
240 u8 dialog_token_allocator;
244 /* Value to indicate no TID reservation */
245 #define IEEE80211_TID_UNRESERVED 0xff
247 #define IEEE80211_FAST_XMIT_MAX_IV 18
250 * struct ieee80211_fast_tx - TX fastpath information
251 * @key: key to use for hw crypto
252 * @hdr: the 802.11 header to put with the frame
253 * @hdr_len: actual 802.11 header length
254 * @sa_offs: offset of the SA
255 * @da_offs: offset of the DA
256 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
257 * @band: band this will be transmitted on, for tx_info
258 * @rcu_head: RCU head to free this struct
260 * This struct is small enough so that the common case (maximum crypto
261 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
264 struct ieee80211_fast_tx {
265 struct ieee80211_key *key;
267 u8 sa_offs, da_offs, pn_offs;
269 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
270 sizeof(rfc1042_header)];
272 struct rcu_head rcu_head;
276 * struct mesh_sta - mesh STA information
277 * @plink_lock: serialize access to plink fields
278 * @llid: Local link ID
279 * @plid: Peer link ID
280 * @aid: local aid supplied by peer
281 * @reason: Cancel reason on PLINK_HOLDING state
282 * @plink_retries: Retries in establishment
283 * @plink_state: peer link state
284 * @plink_timeout: timeout of peer link
285 * @plink_timer: peer link watch timer
286 * @t_offset: timing offset relative to this host
287 * @t_offset_setpoint: reference timing offset of this sta to be used when
288 * calculating clockdrift
289 * @local_pm: local link-specific power save mode
290 * @peer_pm: peer-specific power save mode towards local STA
291 * @nonpeer_pm: STA power save mode towards non-peer neighbors
292 * @processed_beacon: set to true after peer rates and capabilities are
294 * @fail_avg: moving percentage of failed MSDUs
297 struct timer_list plink_timer;
300 s64 t_offset_setpoint;
302 spinlock_t plink_lock;
309 bool processed_beacon;
311 enum nl80211_plink_state plink_state;
314 /* mesh power save */
315 enum nl80211_mesh_power_mode local_pm;
316 enum nl80211_mesh_power_mode peer_pm;
317 enum nl80211_mesh_power_mode nonpeer_pm;
319 /* moving percentage of failed MSDUs */
320 unsigned int fail_avg;
323 DECLARE_EWMA(signal, 1024, 8)
326 * struct sta_info - STA information
328 * This structure collects information about a station that
329 * mac80211 is communicating with.
331 * @list: global linked list entry
332 * @free_list: list entry for keeping track of stations to free
333 * @hash_node: hash node for rhashtable
334 * @addr: station's MAC address - duplicated from public part to
335 * let the hash table work with just a single cacheline
336 * @local: pointer to the global information
337 * @sdata: virtual interface this station belongs to
338 * @ptk: peer keys negotiated with this station, if any
339 * @ptk_idx: last installed peer key index
340 * @gtk: group keys negotiated with this station, if any
341 * @rate_ctrl: rate control algorithm reference
342 * @rate_ctrl_lock: spinlock used to protect rate control data
343 * (data inside the algorithm, so serializes calls there)
344 * @rate_ctrl_priv: rate control private per-STA pointer
345 * @last_tx_rate: rate used for last transmit, to report to userspace as
346 * "the" transmit rate
347 * @last_rx_rate_idx: rx status rate index of the last data packet
348 * @last_rx_rate_flag: rx status flag of the last data packet
349 * @last_rx_rate_vht_flag: rx status vht flag of the last data packet
350 * @last_rx_rate_vht_nss: rx status nss of last data packet
351 * @lock: used for locking all fields that require locking, see comments
352 * in the header file.
353 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
354 * @listen_interval: listen interval of this station, when we're acting as AP
355 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
356 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
357 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
358 * when it leaves power saving state or polls
359 * @tx_filtered: buffers (per AC) of frames we already tried to
360 * transmit but were filtered by hardware due to STA having
361 * entered power saving state, these are also delivered to
362 * the station when it leaves powersave or polls for frames
363 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
364 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
365 * @rx_packets: Number of MSDUs received from this STA
366 * @rx_bytes: Number of bytes received from this STA
367 * @last_rx: time (in jiffies) when last frame was received from this STA
368 * @last_connected: time (in seconds) when a station got connected
369 * @num_duplicates: number of duplicate frames received from this STA
370 * @rx_fragments: number of received MPDUs
371 * @rx_dropped: number of dropped MPDUs from this STA
372 * @last_signal: signal of last received frame from this STA
373 * @avg_signal: moving average of signal of received frames from this STA
374 * @last_ack_signal: signal of last received Ack frame from this STA
375 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
376 * plus one for non-QoS frames)
377 * @tx_filtered_count: number of frames the hardware filtered for this STA
378 * @tx_retry_failed: number of frames that failed retry
379 * @tx_retry_count: total number of retries for frames to this STA
380 * @tx_packets: number of RX/TX MSDUs
381 * @tx_bytes: number of bytes transmitted to this STA
382 * @tid_seq: per-TID sequence numbers for sending to this STA
383 * @ampdu_mlme: A-MPDU state machine state
384 * @timer_to_tid: identity mapping to ID timers
385 * @mesh: mesh STA information
386 * @debugfs: debug filesystem info
387 * @dead: set to true when sta is unlinked
388 * @uploaded: set to true when sta is uploaded to the driver
389 * @lost_packets: number of consecutive lost packets
390 * @sta: station information we share with the driver
391 * @sta_state: duplicates information about station state (for debug)
392 * @beacon_loss_count: number of times beacon loss has triggered
393 * @rcu_head: RCU head used for freeing this station struct
394 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
395 * taken from HT/VHT capabilities or VHT operating mode notification
396 * @chains: chains ever used for RX from this station
397 * @chain_signal_last: last signal (per chain)
398 * @chain_signal_avg: signal average (per chain)
399 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
401 * @cipher_scheme: optional cipher scheme for this station
402 * @last_tdls_pkt_time: holds the time in jiffies of last TDLS pkt ACKed
403 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
404 * @tx_msdu: MSDUs transmitted to this station, using IEEE80211_NUM_TID
405 * entry for non-QoS frames
406 * @tx_msdu_retries: MSDU retries for transmissions to to this station,
407 * using IEEE80211_NUM_TID entry for non-QoS frames
408 * @tx_msdu_failed: MSDU failures for transmissions to to this station,
409 * using IEEE80211_NUM_TID entry for non-QoS frames
410 * @rx_msdu: MSDUs received from this station, using IEEE80211_NUM_TID
411 * entry for non-QoS frames
412 * @fast_tx: TX fastpath information
413 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
417 /* General information, mostly static */
418 struct list_head list, free_list;
419 struct rcu_head rcu_head;
420 struct rhash_head hash_node;
422 struct ieee80211_local *local;
423 struct ieee80211_sub_if_data *sdata;
424 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
425 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
427 struct rate_control_ref *rate_ctrl;
428 void *rate_ctrl_priv;
429 spinlock_t rate_ctrl_lock;
432 struct ieee80211_fast_tx __rcu *fast_tx;
434 #ifdef CONFIG_MAC80211_MESH
435 struct mesh_sta *mesh;
438 struct work_struct drv_deliver_wk;
446 enum ieee80211_sta_state sta_state;
448 /* use the accessors defined below */
449 unsigned long _flags;
451 /* STA powersave lock and frame queues */
453 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
454 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
455 unsigned long driver_buffered_tids;
456 unsigned long txq_buffered_tids;
458 /* Updated from RX path only, no locking requirements */
459 unsigned long rx_packets;
461 unsigned long last_rx;
463 unsigned long num_duplicates;
464 unsigned long rx_fragments;
465 unsigned long rx_dropped;
467 struct ewma_signal avg_signal;
471 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
472 struct ewma_signal chain_signal_avg[IEEE80211_MAX_CHAINS];
474 /* Plus 1 for non-QoS frames */
475 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
477 /* Updated from TX status path only, no locking requirements */
478 unsigned long tx_filtered_count;
479 unsigned long tx_retry_failed, tx_retry_count;
481 /* Updated from TX path only, no locking requirements */
482 u64 tx_packets[IEEE80211_NUM_ACS];
483 u64 tx_bytes[IEEE80211_NUM_ACS];
484 struct ieee80211_tx_rate last_tx_rate;
485 int last_rx_rate_idx;
486 u32 last_rx_rate_flag;
487 u32 last_rx_rate_vht_flag;
488 u8 last_rx_rate_vht_nss;
489 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
490 u64 tx_msdu[IEEE80211_NUM_TIDS + 1];
491 u64 tx_msdu_retries[IEEE80211_NUM_TIDS + 1];
492 u64 tx_msdu_failed[IEEE80211_NUM_TIDS + 1];
493 u64 rx_msdu[IEEE80211_NUM_TIDS + 1];
496 * Aggregation information, locked with lock.
498 struct sta_ampdu_mlme ampdu_mlme;
499 u8 timer_to_tid[IEEE80211_NUM_TIDS];
501 #ifdef CONFIG_MAC80211_DEBUGFS
502 struct sta_info_debugfsdentries {
508 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
510 unsigned int lost_packets;
511 unsigned int beacon_loss_count;
513 enum ieee80211_smps_mode known_smps_mode;
514 const struct ieee80211_cipher_scheme *cipher_scheme;
516 /* TDLS timeout data */
517 unsigned long last_tdls_pkt_time;
521 struct cfg80211_chan_def tdls_chandef;
524 struct ieee80211_sta sta;
527 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
529 #ifdef CONFIG_MAC80211_MESH
530 return sta->mesh->plink_state;
532 return NL80211_PLINK_LISTEN;
535 static inline void set_sta_flag(struct sta_info *sta,
536 enum ieee80211_sta_info_flags flag)
538 WARN_ON(flag == WLAN_STA_AUTH ||
539 flag == WLAN_STA_ASSOC ||
540 flag == WLAN_STA_AUTHORIZED);
541 set_bit(flag, &sta->_flags);
544 static inline void clear_sta_flag(struct sta_info *sta,
545 enum ieee80211_sta_info_flags flag)
547 WARN_ON(flag == WLAN_STA_AUTH ||
548 flag == WLAN_STA_ASSOC ||
549 flag == WLAN_STA_AUTHORIZED);
550 clear_bit(flag, &sta->_flags);
553 static inline int test_sta_flag(struct sta_info *sta,
554 enum ieee80211_sta_info_flags flag)
556 return test_bit(flag, &sta->_flags);
559 static inline int test_and_clear_sta_flag(struct sta_info *sta,
560 enum ieee80211_sta_info_flags flag)
562 WARN_ON(flag == WLAN_STA_AUTH ||
563 flag == WLAN_STA_ASSOC ||
564 flag == WLAN_STA_AUTHORIZED);
565 return test_and_clear_bit(flag, &sta->_flags);
568 static inline int test_and_set_sta_flag(struct sta_info *sta,
569 enum ieee80211_sta_info_flags flag)
571 WARN_ON(flag == WLAN_STA_AUTH ||
572 flag == WLAN_STA_ASSOC ||
573 flag == WLAN_STA_AUTHORIZED);
574 return test_and_set_bit(flag, &sta->_flags);
577 int sta_info_move_state(struct sta_info *sta,
578 enum ieee80211_sta_state new_state);
580 static inline void sta_info_pre_move_state(struct sta_info *sta,
581 enum ieee80211_sta_state new_state)
585 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
587 ret = sta_info_move_state(sta, new_state);
592 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
593 struct tid_ampdu_tx *tid_tx);
595 static inline struct tid_ampdu_tx *
596 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
598 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
599 lockdep_is_held(&sta->lock) ||
600 lockdep_is_held(&sta->ampdu_mlme.mtx));
603 /* Maximum number of frames to buffer per power saving station per AC */
604 #define STA_MAX_TX_BUFFER 64
606 /* Minimum buffered frame expiry time. If STA uses listen interval that is
607 * smaller than this value, the minimum value here is used instead. */
608 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
610 /* How often station data is cleaned up (e.g., expiration of buffered frames)
612 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
615 * Get a STA info, must be under RCU read lock.
617 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
620 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
623 u32 sta_addr_hash(const void *key, u32 length, u32 seed);
625 #define _sta_bucket_idx(_tbl, _a) \
626 rht_bucket_index(_tbl, sta_addr_hash(_a, ETH_ALEN, (_tbl)->hash_rnd))
628 #define for_each_sta_info(local, tbl, _addr, _sta, _tmp) \
629 rht_for_each_entry_rcu(_sta, _tmp, tbl, \
630 _sta_bucket_idx(tbl, _addr), \
632 /* compare address and run code only if it matches */ \
633 if (ether_addr_equal(_sta->addr, (_addr)))
636 * Get STA info by index, BROKEN!
638 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
641 * Create a new STA info, caller owns returned structure
642 * until sta_info_insert().
644 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
645 const u8 *addr, gfp_t gfp);
647 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
650 * Insert STA info into hash table/list, returns zero or a
651 * -EEXIST if (if the same MAC address is already present).
653 * Calling the non-rcu version makes the caller relinquish,
654 * the _rcu version calls read_lock_rcu() and must be called
657 int sta_info_insert(struct sta_info *sta);
658 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
660 int __must_check __sta_info_destroy(struct sta_info *sta);
661 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
663 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
666 void sta_info_recalc_tim(struct sta_info *sta);
668 int sta_info_init(struct ieee80211_local *local);
669 void sta_info_stop(struct ieee80211_local *local);
672 * sta_info_flush - flush matching STA entries from the STA table
674 * Returns the number of removed STA entries.
676 * @sdata: sdata to remove all stations from
677 * @vlans: if the given interface is an AP interface, also flush VLANs
679 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
681 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
683 return __sta_info_flush(sdata, false);
686 void sta_set_rate_info_tx(struct sta_info *sta,
687 const struct ieee80211_tx_rate *rate,
688 struct rate_info *rinfo);
689 void sta_set_rate_info_rx(struct sta_info *sta,
690 struct rate_info *rinfo);
691 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo);
693 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
694 unsigned long exp_time);
695 u8 sta_info_tx_streams(struct sta_info *sta);
697 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
698 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
699 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
701 #endif /* STA_INFO_H */