2 * Copyright 2002-2005, Devicescape Software, Inc.
3 * Copyright 2013-2014 Intel Mobile Communications GmbH
4 * Copyright(c) 2015-2016 Intel Deutschland GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
14 #include <linux/list.h>
15 #include <linux/types.h>
16 #include <linux/if_ether.h>
17 #include <linux/workqueue.h>
18 #include <linux/average.h>
19 #include <linux/etherdevice.h>
20 #include <linux/rhashtable.h>
21 #include <linux/u64_stats_sync.h>
25 * enum ieee80211_sta_info_flags - Stations flags
27 * These flags are used with &struct sta_info's @flags member, but
28 * only indirectly with set_sta_flag() and friends.
30 * @WLAN_STA_AUTH: Station is authenticated.
31 * @WLAN_STA_ASSOC: Station is associated.
32 * @WLAN_STA_PS_STA: Station is in power-save mode
33 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
34 * This bit is always checked so needs to be enabled for all stations
35 * when virtual port control is not in use.
36 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
38 * @WLAN_STA_WDS: Station is one of our WDS peers.
39 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
40 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
41 * frame to this station is transmitted.
42 * @WLAN_STA_MFP: Management frame protection is used with this STA.
43 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
44 * during suspend/resume and station removal.
45 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
46 * power-save mode logically to flush frames that might still
48 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
49 * station in power-save mode, reply when the driver unblocks.
50 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
51 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
52 * packets. This means the link is enabled.
53 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
55 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
56 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
58 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
59 * the BSS base channel.
60 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
61 * keeping station in power-save mode, reply when the driver
62 * unblocks the station.
63 * @WLAN_STA_SP: Station is in a service period, so don't try to
64 * reply to other uAPSD trigger frames or PS-Poll.
65 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
66 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
67 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
68 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
69 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
70 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
71 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
72 * until pending frames are delivered
74 * @NUM_WLAN_STA_FLAGS: number of defined flags
76 enum ieee80211_sta_info_flags {
81 WLAN_STA_SHORT_PREAMBLE,
83 WLAN_STA_CLEAR_PS_FILT,
89 WLAN_STA_TDLS_PEER_AUTH,
90 WLAN_STA_TDLS_INITIATOR,
91 WLAN_STA_TDLS_CHAN_SWITCH,
92 WLAN_STA_TDLS_OFF_CHANNEL,
93 WLAN_STA_TDLS_WIDER_BW,
98 WLAN_STA_RATE_CONTROL,
99 WLAN_STA_TOFFSET_KNOWN,
101 WLAN_STA_MPSP_RECIPIENT,
107 #define ADDBA_RESP_INTERVAL HZ
108 #define HT_AGG_MAX_RETRIES 15
109 #define HT_AGG_BURST_RETRIES 3
110 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
112 #define HT_AGG_STATE_DRV_READY 0
113 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
114 #define HT_AGG_STATE_OPERATIONAL 2
115 #define HT_AGG_STATE_STOPPING 3
116 #define HT_AGG_STATE_WANT_START 4
117 #define HT_AGG_STATE_WANT_STOP 5
119 enum ieee80211_agg_stop_reason {
121 AGG_STOP_LOCAL_REQUEST,
122 AGG_STOP_PEER_REQUEST,
123 AGG_STOP_DESTROY_STA,
127 * struct tid_ampdu_tx - TID aggregation information (Tx).
129 * @rcu_head: rcu head for freeing structure
130 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
131 * @addba_resp_timer: timer for peer's response to addba request
132 * @pending: pending frames queue -- use sta's spinlock to protect
133 * @dialog_token: dialog token for aggregation session
134 * @timeout: session timeout value to be filled in ADDBA requests
135 * @state: session state (see above)
136 * @last_tx: jiffies of last tx activity
137 * @stop_initiator: initiator of a session stop
138 * @tx_stop: TX DelBA frame when stopping
139 * @buf_size: reorder buffer size at receiver
140 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
141 * @bar_pending: BAR needs to be re-sent
142 * @amsdu: support A-MSDU withing A-MDPU
144 * This structure's lifetime is managed by RCU, assignments to
145 * the array holding it must hold the aggregation mutex.
147 * The TX path can access it under RCU lock-free if, and
148 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
149 * set. Otherwise, the TX path must also acquire the spinlock
150 * and re-check the state, see comments in the tx code
153 struct tid_ampdu_tx {
154 struct rcu_head rcu_head;
155 struct timer_list session_timer;
156 struct timer_list addba_resp_timer;
157 struct sk_buff_head pending;
159 unsigned long last_tx;
172 * struct tid_ampdu_rx - TID aggregation information (Rx).
174 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
175 * A-MSDU with individually reported subframes.
176 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
177 * the reorder buffer that should be ignored when releasing frames
178 * @reorder_time: jiffies when skb was added
179 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
180 * @reorder_timer: releases expired frames from the reorder buffer.
181 * @last_rx: jiffies of last rx activity
182 * @head_seq_num: head sequence number in reordering buffer.
183 * @stored_mpdu_num: number of MPDUs in reordering buffer
184 * @ssn: Starting Sequence Number expected to be aggregated.
185 * @buf_size: buffer size for incoming A-MPDUs
186 * @timeout: reset timer value (in TUs).
187 * @dialog_token: dialog token for aggregation session
188 * @rcu_head: RCU head used for freeing this struct
189 * @reorder_lock: serializes access to reorder buffer, see below.
190 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
192 * @removed: this session is removed (but might have been found due to RCU)
194 * This structure's lifetime is managed by RCU, assignments to
195 * the array holding it must hold the aggregation mutex.
197 * The @reorder_lock is used to protect the members of this
198 * struct, except for @timeout, @buf_size and @dialog_token,
199 * which are constant across the lifetime of the struct (the
200 * dialog token being used only for debugging).
202 struct tid_ampdu_rx {
203 struct rcu_head rcu_head;
204 spinlock_t reorder_lock;
205 u64 reorder_buf_filtered;
206 struct sk_buff_head *reorder_buf;
207 unsigned long *reorder_time;
208 struct timer_list session_timer;
209 struct timer_list reorder_timer;
210 unsigned long last_rx;
222 * struct sta_ampdu_mlme - STA aggregation information.
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.
227 * @tid_rx: aggregation info for Rx per TID -- RCU protected
228 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
229 * RX timer expired until the work for it runs
230 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
231 * driver requested to close until the work for it runs
232 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
233 * @work: work struct for starting/stopping aggregation
234 * @tid_tx: aggregation info for Tx per TID
235 * @tid_start_tx: sessions where start was requested
236 * @last_addba_req_time: timestamp of the last addBA request.
237 * @addba_req_num: number of times addBA request has been sent.
238 * @dialog_token_allocator: dialog token enumerator for each new session;
240 struct sta_ampdu_mlme {
243 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
244 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
245 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
246 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
248 struct work_struct work;
249 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
250 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
251 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
252 u8 addba_req_num[IEEE80211_NUM_TIDS];
253 u8 dialog_token_allocator;
257 /* Value to indicate no TID reservation */
258 #define IEEE80211_TID_UNRESERVED 0xff
260 #define IEEE80211_FAST_XMIT_MAX_IV 18
263 * struct ieee80211_fast_tx - TX fastpath information
264 * @key: key to use for hw crypto
265 * @hdr: the 802.11 header to put with the frame
266 * @hdr_len: actual 802.11 header length
267 * @sa_offs: offset of the SA
268 * @da_offs: offset of the DA
269 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
270 * @band: band this will be transmitted on, for tx_info
271 * @rcu_head: RCU head to free this struct
273 * This struct is small enough so that the common case (maximum crypto
274 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
277 struct ieee80211_fast_tx {
278 struct ieee80211_key *key;
280 u8 sa_offs, da_offs, pn_offs;
282 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
283 sizeof(rfc1042_header)];
285 struct rcu_head rcu_head;
289 * struct ieee80211_fast_rx - RX fastpath information
290 * @dev: netdevice for reporting the SKB
291 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
292 * @vif_addr: interface address
293 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
294 * @control_port_protocol: control port protocol copied from sdata
295 * @expected_ds_bits: from/to DS bits expected
296 * @icv_len: length of the MIC if present
297 * @key: bool indicating encryption is expected (key is set)
298 * @sta_notify: notify the MLME code (once)
299 * @internal_forward: forward froms internally on AP/VLAN type interfaces
300 * @uses_rss: copy of USES_RSS hw flag
301 * @da_offs: offset of the DA in the header (for header conversion)
302 * @sa_offs: offset of the SA in the header (for header conversion)
303 * @rcu_head: RCU head for freeing this structure
305 struct ieee80211_fast_rx {
306 struct net_device *dev;
307 enum nl80211_iftype vif_type;
308 u8 vif_addr[ETH_ALEN] __aligned(2);
309 u8 rfc1042_hdr[6] __aligned(2);
310 __be16 control_port_protocol;
311 __le16 expected_ds_bits;
319 struct rcu_head rcu_head;
323 * struct mesh_sta - mesh STA information
324 * @plink_lock: serialize access to plink fields
325 * @llid: Local link ID
326 * @plid: Peer link ID
327 * @aid: local aid supplied by peer
328 * @reason: Cancel reason on PLINK_HOLDING state
329 * @plink_retries: Retries in establishment
330 * @plink_state: peer link state
331 * @plink_timeout: timeout of peer link
332 * @plink_timer: peer link watch timer
333 * @t_offset: timing offset relative to this host
334 * @t_offset_setpoint: reference timing offset of this sta to be used when
335 * calculating clockdrift
336 * @local_pm: local link-specific power save mode
337 * @peer_pm: peer-specific power save mode towards local STA
338 * @nonpeer_pm: STA power save mode towards non-peer neighbors
339 * @processed_beacon: set to true after peer rates and capabilities are
341 * @fail_avg: moving percentage of failed MSDUs
344 struct timer_list plink_timer;
347 s64 t_offset_setpoint;
349 spinlock_t plink_lock;
356 bool processed_beacon;
358 enum nl80211_plink_state plink_state;
361 /* mesh power save */
362 enum nl80211_mesh_power_mode local_pm;
363 enum nl80211_mesh_power_mode peer_pm;
364 enum nl80211_mesh_power_mode nonpeer_pm;
366 /* moving percentage of failed MSDUs */
367 unsigned int fail_avg;
370 DECLARE_EWMA(signal, 1024, 8)
372 struct ieee80211_sta_rx_stats {
373 unsigned long packets;
374 unsigned long last_rx;
375 unsigned long num_duplicates;
376 unsigned long fragments;
377 unsigned long dropped;
380 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
382 struct u64_stats_sync syncp;
384 u64 msdu[IEEE80211_NUM_TIDS + 1];
388 * struct sta_info - STA information
390 * This structure collects information about a station that
391 * mac80211 is communicating with.
393 * @list: global linked list entry
394 * @free_list: list entry for keeping track of stations to free
395 * @hash_node: hash node for rhashtable
396 * @addr: station's MAC address - duplicated from public part to
397 * let the hash table work with just a single cacheline
398 * @local: pointer to the global information
399 * @sdata: virtual interface this station belongs to
400 * @ptk: peer keys negotiated with this station, if any
401 * @ptk_idx: last installed peer key index
402 * @gtk: group keys negotiated with this station, if any
403 * @rate_ctrl: rate control algorithm reference
404 * @rate_ctrl_lock: spinlock used to protect rate control data
405 * (data inside the algorithm, so serializes calls there)
406 * @rate_ctrl_priv: rate control private per-STA pointer
407 * @lock: used for locking all fields that require locking, see comments
408 * in the header file.
409 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
410 * @listen_interval: listen interval of this station, when we're acting as AP
411 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
412 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
413 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
414 * when it leaves power saving state or polls
415 * @tx_filtered: buffers (per AC) of frames we already tried to
416 * transmit but were filtered by hardware due to STA having
417 * entered power saving state, these are also delivered to
418 * the station when it leaves powersave or polls for frames
419 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
420 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
421 * @last_connected: time (in seconds) when a station got connected
422 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
423 * plus one for non-QoS frames)
424 * @tid_seq: per-TID sequence numbers for sending to this STA
425 * @ampdu_mlme: A-MPDU state machine state
426 * @timer_to_tid: identity mapping to ID timers
427 * @mesh: mesh STA information
428 * @debugfs_dir: debug filesystem directory dentry
429 * @dead: set to true when sta is unlinked
430 * @removed: set to true when sta is being removed from sta_list
431 * @uploaded: set to true when sta is uploaded to the driver
432 * @sta: station information we share with the driver
433 * @sta_state: duplicates information about station state (for debug)
434 * @beacon_loss_count: number of times beacon loss has triggered
435 * @rcu_head: RCU head used for freeing this station struct
436 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
437 * taken from HT/VHT capabilities or VHT operating mode notification
438 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
440 * @cipher_scheme: optional cipher scheme for this station
441 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
442 * @fast_tx: TX fastpath information
443 * @fast_rx: RX fastpath information
444 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
446 * @tx_stats: TX statistics
447 * @rx_stats: RX statistics
448 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
449 * this (by advertising the USES_RSS hw flag)
450 * @status_stats: TX status statistics
453 /* General information, mostly static */
454 struct list_head list, free_list;
455 struct rcu_head rcu_head;
456 struct rhash_head hash_node;
458 struct ieee80211_local *local;
459 struct ieee80211_sub_if_data *sdata;
460 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
461 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
463 struct rate_control_ref *rate_ctrl;
464 void *rate_ctrl_priv;
465 spinlock_t rate_ctrl_lock;
468 struct ieee80211_fast_tx __rcu *fast_tx;
469 struct ieee80211_fast_rx __rcu *fast_rx;
470 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
472 #ifdef CONFIG_MAC80211_MESH
473 struct mesh_sta *mesh;
476 struct work_struct drv_deliver_wk;
485 enum ieee80211_sta_state sta_state;
487 /* use the accessors defined below */
488 unsigned long _flags;
490 /* STA powersave lock and frame queues */
492 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
493 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
494 unsigned long driver_buffered_tids;
495 unsigned long txq_buffered_tids;
499 /* Updated from RX path only, no locking requirements */
500 struct ieee80211_sta_rx_stats rx_stats;
502 struct ewma_signal signal;
503 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
506 /* Plus 1 for non-QoS frames */
507 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
509 /* Updated from TX status path only, no locking requirements */
511 unsigned long filtered;
512 unsigned long retry_failed, retry_count;
513 unsigned int lost_packets;
514 unsigned long last_tdls_pkt_time;
515 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
516 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
517 unsigned long last_ack;
520 /* Updated from TX path only, no locking requirements */
522 u64 packets[IEEE80211_NUM_ACS];
523 u64 bytes[IEEE80211_NUM_ACS];
524 struct ieee80211_tx_rate last_rate;
525 u64 msdu[IEEE80211_NUM_TIDS + 1];
527 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
530 * Aggregation information, locked with lock.
532 struct sta_ampdu_mlme ampdu_mlme;
533 u8 timer_to_tid[IEEE80211_NUM_TIDS];
535 #ifdef CONFIG_MAC80211_DEBUGFS
536 struct dentry *debugfs_dir;
539 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
541 enum ieee80211_smps_mode known_smps_mode;
542 const struct ieee80211_cipher_scheme *cipher_scheme;
546 struct cfg80211_chan_def tdls_chandef;
549 struct ieee80211_sta sta;
552 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
554 #ifdef CONFIG_MAC80211_MESH
555 return sta->mesh->plink_state;
557 return NL80211_PLINK_LISTEN;
560 static inline void set_sta_flag(struct sta_info *sta,
561 enum ieee80211_sta_info_flags flag)
563 WARN_ON(flag == WLAN_STA_AUTH ||
564 flag == WLAN_STA_ASSOC ||
565 flag == WLAN_STA_AUTHORIZED);
566 set_bit(flag, &sta->_flags);
569 static inline void clear_sta_flag(struct sta_info *sta,
570 enum ieee80211_sta_info_flags flag)
572 WARN_ON(flag == WLAN_STA_AUTH ||
573 flag == WLAN_STA_ASSOC ||
574 flag == WLAN_STA_AUTHORIZED);
575 clear_bit(flag, &sta->_flags);
578 static inline int test_sta_flag(struct sta_info *sta,
579 enum ieee80211_sta_info_flags flag)
581 return test_bit(flag, &sta->_flags);
584 static inline int test_and_clear_sta_flag(struct sta_info *sta,
585 enum ieee80211_sta_info_flags flag)
587 WARN_ON(flag == WLAN_STA_AUTH ||
588 flag == WLAN_STA_ASSOC ||
589 flag == WLAN_STA_AUTHORIZED);
590 return test_and_clear_bit(flag, &sta->_flags);
593 static inline int test_and_set_sta_flag(struct sta_info *sta,
594 enum ieee80211_sta_info_flags flag)
596 WARN_ON(flag == WLAN_STA_AUTH ||
597 flag == WLAN_STA_ASSOC ||
598 flag == WLAN_STA_AUTHORIZED);
599 return test_and_set_bit(flag, &sta->_flags);
602 int sta_info_move_state(struct sta_info *sta,
603 enum ieee80211_sta_state new_state);
605 static inline void sta_info_pre_move_state(struct sta_info *sta,
606 enum ieee80211_sta_state new_state)
610 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
612 ret = sta_info_move_state(sta, new_state);
617 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
618 struct tid_ampdu_tx *tid_tx);
620 static inline struct tid_ampdu_tx *
621 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
623 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
624 lockdep_is_held(&sta->lock) ||
625 lockdep_is_held(&sta->ampdu_mlme.mtx));
628 /* Maximum number of frames to buffer per power saving station per AC */
629 #define STA_MAX_TX_BUFFER 64
631 /* Minimum buffered frame expiry time. If STA uses listen interval that is
632 * smaller than this value, the minimum value here is used instead. */
633 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
635 /* How often station data is cleaned up (e.g., expiration of buffered frames)
637 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
640 * Get a STA info, must be under RCU read lock.
642 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
645 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
648 u32 sta_addr_hash(const void *key, u32 length, u32 seed);
650 #define _sta_bucket_idx(_tbl, _a) \
651 rht_bucket_index(_tbl, sta_addr_hash(_a, ETH_ALEN, (_tbl)->hash_rnd))
653 #define for_each_sta_info(local, tbl, _addr, _sta, _tmp) \
654 rht_for_each_entry_rcu(_sta, _tmp, tbl, \
655 _sta_bucket_idx(tbl, _addr), \
657 /* compare address and run code only if it matches */ \
658 if (ether_addr_equal(_sta->addr, (_addr)))
661 * Get STA info by index, BROKEN!
663 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
666 * Create a new STA info, caller owns returned structure
667 * until sta_info_insert().
669 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
670 const u8 *addr, gfp_t gfp);
672 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
675 * Insert STA info into hash table/list, returns zero or a
676 * -EEXIST if (if the same MAC address is already present).
678 * Calling the non-rcu version makes the caller relinquish,
679 * the _rcu version calls read_lock_rcu() and must be called
682 int sta_info_insert(struct sta_info *sta);
683 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
685 int __must_check __sta_info_destroy(struct sta_info *sta);
686 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
688 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
691 void sta_info_recalc_tim(struct sta_info *sta);
693 int sta_info_init(struct ieee80211_local *local);
694 void sta_info_stop(struct ieee80211_local *local);
697 * sta_info_flush - flush matching STA entries from the STA table
699 * Returns the number of removed STA entries.
701 * @sdata: sdata to remove all stations from
702 * @vlans: if the given interface is an AP interface, also flush VLANs
704 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
706 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
708 return __sta_info_flush(sdata, false);
711 void sta_set_rate_info_tx(struct sta_info *sta,
712 const struct ieee80211_tx_rate *rate,
713 struct rate_info *rinfo);
714 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo);
716 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
717 unsigned long exp_time);
718 u8 sta_info_tx_streams(struct sta_info *sta);
720 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
721 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
722 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
724 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
726 #define STA_STATS_RATE_INVALID 0
727 #define STA_STATS_RATE_VHT 0x8000
728 #define STA_STATS_RATE_HT 0x4000
729 #define STA_STATS_RATE_LEGACY 0x2000
730 #define STA_STATS_RATE_SGI 0x1000
731 #define STA_STATS_RATE_BW_SHIFT 9
732 #define STA_STATS_RATE_BW_MASK (0x7 << STA_STATS_RATE_BW_SHIFT)
734 static inline u16 sta_stats_encode_rate(struct ieee80211_rx_status *s)
738 if (s->vht_flag & RX_VHT_FLAG_80MHZ)
739 r |= RATE_INFO_BW_80 << STA_STATS_RATE_BW_SHIFT;
740 else if (s->vht_flag & RX_VHT_FLAG_160MHZ)
741 r |= RATE_INFO_BW_160 << STA_STATS_RATE_BW_SHIFT;
742 else if (s->flag & RX_FLAG_40MHZ)
743 r |= RATE_INFO_BW_40 << STA_STATS_RATE_BW_SHIFT;
744 else if (s->flag & RX_FLAG_10MHZ)
745 r |= RATE_INFO_BW_10 << STA_STATS_RATE_BW_SHIFT;
746 else if (s->flag & RX_FLAG_5MHZ)
747 r |= RATE_INFO_BW_5 << STA_STATS_RATE_BW_SHIFT;
749 r |= RATE_INFO_BW_20 << STA_STATS_RATE_BW_SHIFT;
751 if (s->flag & RX_FLAG_SHORT_GI)
752 r |= STA_STATS_RATE_SGI;
754 if (s->flag & RX_FLAG_VHT)
755 r |= STA_STATS_RATE_VHT | (s->vht_nss << 4);
756 else if (s->flag & RX_FLAG_HT)
757 r |= STA_STATS_RATE_HT;
759 r |= STA_STATS_RATE_LEGACY | (s->band << 4);
764 #endif /* STA_INFO_H */