2 * Copyright 2002-2005, Devicescape Software, Inc.
3 * Copyright 2013-2014 Intel Mobile Communications GmbH
4 * Copyright(c) 2015-2017 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/bitfield.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rhashtable.h>
22 #include <linux/u64_stats_sync.h>
26 * enum ieee80211_sta_info_flags - Stations flags
28 * These flags are used with &struct sta_info's @flags member, but
29 * only indirectly with set_sta_flag() and friends.
31 * @WLAN_STA_AUTH: Station is authenticated.
32 * @WLAN_STA_ASSOC: Station is associated.
33 * @WLAN_STA_PS_STA: Station is in power-save mode
34 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
35 * This bit is always checked so needs to be enabled for all stations
36 * when virtual port control is not in use.
37 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
39 * @WLAN_STA_WDS: Station is one of our WDS peers.
40 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
41 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
42 * frame to this station is transmitted.
43 * @WLAN_STA_MFP: Management frame protection is used with this STA.
44 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
45 * during suspend/resume and station removal.
46 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
47 * power-save mode logically to flush frames that might still
49 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
50 * station in power-save mode, reply when the driver unblocks.
51 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
52 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
53 * packets. This means the link is enabled.
54 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
56 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
57 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
59 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
60 * the BSS base channel.
61 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
62 * keeping station in power-save mode, reply when the driver
63 * unblocks the station.
64 * @WLAN_STA_SP: Station is in a service period, so don't try to
65 * reply to other uAPSD trigger frames or PS-Poll.
66 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
67 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
68 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
69 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
70 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
71 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
72 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
73 * until pending frames are delivered
75 * @NUM_WLAN_STA_FLAGS: number of defined flags
77 enum ieee80211_sta_info_flags {
82 WLAN_STA_SHORT_PREAMBLE,
84 WLAN_STA_CLEAR_PS_FILT,
90 WLAN_STA_TDLS_PEER_AUTH,
91 WLAN_STA_TDLS_INITIATOR,
92 WLAN_STA_TDLS_CHAN_SWITCH,
93 WLAN_STA_TDLS_OFF_CHANNEL,
94 WLAN_STA_TDLS_WIDER_BW,
99 WLAN_STA_RATE_CONTROL,
100 WLAN_STA_TOFFSET_KNOWN,
102 WLAN_STA_MPSP_RECIPIENT,
108 #define ADDBA_RESP_INTERVAL HZ
109 #define HT_AGG_MAX_RETRIES 15
110 #define HT_AGG_BURST_RETRIES 3
111 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
113 #define HT_AGG_STATE_DRV_READY 0
114 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
115 #define HT_AGG_STATE_OPERATIONAL 2
116 #define HT_AGG_STATE_STOPPING 3
117 #define HT_AGG_STATE_WANT_START 4
118 #define HT_AGG_STATE_WANT_STOP 5
119 #define HT_AGG_STATE_START_CB 6
120 #define HT_AGG_STATE_STOP_CB 7
122 enum ieee80211_agg_stop_reason {
124 AGG_STOP_LOCAL_REQUEST,
125 AGG_STOP_PEER_REQUEST,
126 AGG_STOP_DESTROY_STA,
130 * struct tid_ampdu_tx - TID aggregation information (Tx).
132 * @rcu_head: rcu head for freeing structure
133 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
134 * @addba_resp_timer: timer for peer's response to addba request
135 * @pending: pending frames queue -- use sta's spinlock to protect
136 * @dialog_token: dialog token for aggregation session
137 * @timeout: session timeout value to be filled in ADDBA requests
138 * @state: session state (see above)
139 * @last_tx: jiffies of last tx activity
140 * @stop_initiator: initiator of a session stop
141 * @tx_stop: TX DelBA frame when stopping
142 * @buf_size: reorder buffer size at receiver
143 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
144 * @bar_pending: BAR needs to be re-sent
145 * @amsdu: support A-MSDU withing A-MDPU
147 * This structure's lifetime is managed by RCU, assignments to
148 * the array holding it must hold the aggregation mutex.
150 * The TX path can access it under RCU lock-free if, and
151 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
152 * set. Otherwise, the TX path must also acquire the spinlock
153 * and re-check the state, see comments in the tx code
156 struct tid_ampdu_tx {
157 struct rcu_head rcu_head;
158 struct timer_list session_timer;
159 struct timer_list addba_resp_timer;
160 struct sk_buff_head pending;
162 unsigned long last_tx;
175 * struct tid_ampdu_rx - TID aggregation information (Rx).
177 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
178 * A-MSDU with individually reported subframes.
179 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
180 * the reorder buffer that should be ignored when releasing frames
181 * @reorder_time: jiffies when skb was added
182 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
183 * @reorder_timer: releases expired frames from the reorder buffer.
184 * @last_rx: jiffies of last rx activity
185 * @head_seq_num: head sequence number in reordering buffer.
186 * @stored_mpdu_num: number of MPDUs in reordering buffer
187 * @ssn: Starting Sequence Number expected to be aggregated.
188 * @buf_size: buffer size for incoming A-MPDUs
189 * @timeout: reset timer value (in TUs).
190 * @rcu_head: RCU head used for freeing this struct
191 * @reorder_lock: serializes access to reorder buffer, see below.
192 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
194 * @removed: this session is removed (but might have been found due to RCU)
195 * @started: this session has started (head ssn or higher was received)
197 * This structure's lifetime is managed by RCU, assignments to
198 * the array holding it must hold the aggregation mutex.
200 * The @reorder_lock is used to protect the members of this
201 * struct, except for @timeout, @buf_size and @dialog_token,
202 * which are constant across the lifetime of the struct (the
203 * dialog token being used only for debugging).
205 struct tid_ampdu_rx {
206 struct rcu_head rcu_head;
207 spinlock_t reorder_lock;
208 u64 reorder_buf_filtered;
209 struct sk_buff_head *reorder_buf;
210 unsigned long *reorder_time;
211 struct timer_list session_timer;
212 struct timer_list reorder_timer;
213 unsigned long last_rx;
225 * struct sta_ampdu_mlme - STA aggregation information.
227 * @mtx: mutex to protect all TX data (except non-NULL assignments
228 * to tid_tx[idx], which are protected by the sta spinlock)
229 * tid_start_tx is also protected by sta->lock.
230 * @tid_rx: aggregation info for Rx per TID -- RCU protected
231 * @tid_rx_token: dialog tokens for valid aggregation sessions
232 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
233 * RX timer expired until the work for it runs
234 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
235 * driver requested to close until the work for it runs
236 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
237 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
238 * unexpected aggregation related frames outside a session
239 * @work: work struct for starting/stopping aggregation
240 * @tid_tx: aggregation info for Tx per TID
241 * @tid_start_tx: sessions where start was requested
242 * @last_addba_req_time: timestamp of the last addBA request.
243 * @addba_req_num: number of times addBA request has been sent.
244 * @dialog_token_allocator: dialog token enumerator for each new session;
246 struct sta_ampdu_mlme {
249 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
250 u8 tid_rx_token[IEEE80211_NUM_TIDS];
251 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
252 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
253 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
254 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
256 struct work_struct work;
257 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
258 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
259 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
260 u8 addba_req_num[IEEE80211_NUM_TIDS];
261 u8 dialog_token_allocator;
265 /* Value to indicate no TID reservation */
266 #define IEEE80211_TID_UNRESERVED 0xff
268 #define IEEE80211_FAST_XMIT_MAX_IV 18
271 * struct ieee80211_fast_tx - TX fastpath information
272 * @key: key to use for hw crypto
273 * @hdr: the 802.11 header to put with the frame
274 * @hdr_len: actual 802.11 header length
275 * @sa_offs: offset of the SA
276 * @da_offs: offset of the DA
277 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
278 * @band: band this will be transmitted on, for tx_info
279 * @rcu_head: RCU head to free this struct
281 * This struct is small enough so that the common case (maximum crypto
282 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
285 struct ieee80211_fast_tx {
286 struct ieee80211_key *key;
288 u8 sa_offs, da_offs, pn_offs;
290 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
291 sizeof(rfc1042_header)] __aligned(2);
293 struct rcu_head rcu_head;
297 * struct ieee80211_fast_rx - RX fastpath information
298 * @dev: netdevice for reporting the SKB
299 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
300 * @vif_addr: interface address
301 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
302 * @control_port_protocol: control port protocol copied from sdata
303 * @expected_ds_bits: from/to DS bits expected
304 * @icv_len: length of the MIC if present
305 * @key: bool indicating encryption is expected (key is set)
306 * @sta_notify: notify the MLME code (once)
307 * @internal_forward: forward froms internally on AP/VLAN type interfaces
308 * @uses_rss: copy of USES_RSS hw flag
309 * @da_offs: offset of the DA in the header (for header conversion)
310 * @sa_offs: offset of the SA in the header (for header conversion)
311 * @rcu_head: RCU head for freeing this structure
313 struct ieee80211_fast_rx {
314 struct net_device *dev;
315 enum nl80211_iftype vif_type;
316 u8 vif_addr[ETH_ALEN] __aligned(2);
317 u8 rfc1042_hdr[6] __aligned(2);
318 __be16 control_port_protocol;
319 __le16 expected_ds_bits;
327 struct rcu_head rcu_head;
330 /* we use only values in the range 0-100, so pick a large precision */
331 DECLARE_EWMA(mesh_fail_avg, 20, 8)
334 * struct mesh_sta - mesh STA information
335 * @plink_lock: serialize access to plink fields
336 * @llid: Local link ID
337 * @plid: Peer link ID
338 * @aid: local aid supplied by peer
339 * @reason: Cancel reason on PLINK_HOLDING state
340 * @plink_retries: Retries in establishment
341 * @plink_state: peer link state
342 * @plink_timeout: timeout of peer link
343 * @plink_timer: peer link watch timer
344 * @t_offset: timing offset relative to this host
345 * @t_offset_setpoint: reference timing offset of this sta to be used when
346 * calculating clockdrift
347 * @local_pm: local link-specific power save mode
348 * @peer_pm: peer-specific power save mode towards local STA
349 * @nonpeer_pm: STA power save mode towards non-peer neighbors
350 * @processed_beacon: set to true after peer rates and capabilities are
352 * @fail_avg: moving percentage of failed MSDUs
355 struct timer_list plink_timer;
358 s64 t_offset_setpoint;
360 spinlock_t plink_lock;
367 bool processed_beacon;
369 enum nl80211_plink_state plink_state;
372 /* mesh power save */
373 enum nl80211_mesh_power_mode local_pm;
374 enum nl80211_mesh_power_mode peer_pm;
375 enum nl80211_mesh_power_mode nonpeer_pm;
377 /* moving percentage of failed MSDUs */
378 struct ewma_mesh_fail_avg fail_avg;
381 DECLARE_EWMA(signal, 10, 8)
383 struct ieee80211_sta_rx_stats {
384 unsigned long packets;
385 unsigned long last_rx;
386 unsigned long num_duplicates;
387 unsigned long fragments;
388 unsigned long dropped;
391 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
393 struct u64_stats_sync syncp;
395 u64 msdu[IEEE80211_NUM_TIDS + 1];
399 * struct sta_info - STA information
401 * This structure collects information about a station that
402 * mac80211 is communicating with.
404 * @list: global linked list entry
405 * @free_list: list entry for keeping track of stations to free
406 * @hash_node: hash node for rhashtable
407 * @addr: station's MAC address - duplicated from public part to
408 * let the hash table work with just a single cacheline
409 * @local: pointer to the global information
410 * @sdata: virtual interface this station belongs to
411 * @ptk: peer keys negotiated with this station, if any
412 * @ptk_idx: last installed peer key index
413 * @gtk: group keys negotiated with this station, if any
414 * @rate_ctrl: rate control algorithm reference
415 * @rate_ctrl_lock: spinlock used to protect rate control data
416 * (data inside the algorithm, so serializes calls there)
417 * @rate_ctrl_priv: rate control private per-STA pointer
418 * @lock: used for locking all fields that require locking, see comments
419 * in the header file.
420 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
421 * @listen_interval: listen interval of this station, when we're acting as AP
422 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
423 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
424 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
425 * when it leaves power saving state or polls
426 * @tx_filtered: buffers (per AC) of frames we already tried to
427 * transmit but were filtered by hardware due to STA having
428 * entered power saving state, these are also delivered to
429 * the station when it leaves powersave or polls for frames
430 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
431 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
432 * @last_connected: time (in seconds) when a station got connected
433 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
434 * plus one for non-QoS frames)
435 * @tid_seq: per-TID sequence numbers for sending to this STA
436 * @ampdu_mlme: A-MPDU state machine state
437 * @timer_to_tid: identity mapping to ID timers
438 * @mesh: mesh STA information
439 * @debugfs_dir: debug filesystem directory dentry
440 * @dead: set to true when sta is unlinked
441 * @removed: set to true when sta is being removed from sta_list
442 * @uploaded: set to true when sta is uploaded to the driver
443 * @sta: station information we share with the driver
444 * @sta_state: duplicates information about station state (for debug)
445 * @rcu_head: RCU head used for freeing this station struct
446 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
447 * taken from HT/VHT capabilities or VHT operating mode notification
448 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
450 * @cipher_scheme: optional cipher scheme for this station
451 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
452 * @fast_tx: TX fastpath information
453 * @fast_rx: RX fastpath information
454 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
456 * @tx_stats: TX statistics
457 * @rx_stats: RX statistics
458 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
459 * this (by advertising the USES_RSS hw flag)
460 * @status_stats: TX status statistics
463 /* General information, mostly static */
464 struct list_head list, free_list;
465 struct rcu_head rcu_head;
466 struct rhlist_head hash_node;
468 struct ieee80211_local *local;
469 struct ieee80211_sub_if_data *sdata;
470 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
471 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
473 struct rate_control_ref *rate_ctrl;
474 void *rate_ctrl_priv;
475 spinlock_t rate_ctrl_lock;
478 struct ieee80211_fast_tx __rcu *fast_tx;
479 struct ieee80211_fast_rx __rcu *fast_rx;
480 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
482 #ifdef CONFIG_MAC80211_MESH
483 struct mesh_sta *mesh;
486 struct work_struct drv_deliver_wk;
495 enum ieee80211_sta_state sta_state;
497 /* use the accessors defined below */
498 unsigned long _flags;
500 /* STA powersave lock and frame queues */
502 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
503 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
504 unsigned long driver_buffered_tids;
505 unsigned long txq_buffered_tids;
509 /* Updated from RX path only, no locking requirements */
510 struct ieee80211_sta_rx_stats rx_stats;
512 struct ewma_signal signal;
513 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
516 /* Plus 1 for non-QoS frames */
517 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
519 /* Updated from TX status path only, no locking requirements */
521 unsigned long filtered;
522 unsigned long retry_failed, retry_count;
523 unsigned int lost_packets;
524 unsigned long last_tdls_pkt_time;
525 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
526 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
527 unsigned long last_ack;
530 /* Updated from TX path only, no locking requirements */
532 u64 packets[IEEE80211_NUM_ACS];
533 u64 bytes[IEEE80211_NUM_ACS];
534 struct ieee80211_tx_rate last_rate;
535 u64 msdu[IEEE80211_NUM_TIDS + 1];
537 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
540 * Aggregation information, locked with lock.
542 struct sta_ampdu_mlme ampdu_mlme;
543 u8 timer_to_tid[IEEE80211_NUM_TIDS];
545 #ifdef CONFIG_MAC80211_DEBUGFS
546 struct dentry *debugfs_dir;
549 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
551 enum ieee80211_smps_mode known_smps_mode;
552 const struct ieee80211_cipher_scheme *cipher_scheme;
556 struct cfg80211_chan_def tdls_chandef;
559 struct ieee80211_sta sta;
562 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
564 #ifdef CONFIG_MAC80211_MESH
565 return sta->mesh->plink_state;
567 return NL80211_PLINK_LISTEN;
570 static inline void set_sta_flag(struct sta_info *sta,
571 enum ieee80211_sta_info_flags flag)
573 WARN_ON(flag == WLAN_STA_AUTH ||
574 flag == WLAN_STA_ASSOC ||
575 flag == WLAN_STA_AUTHORIZED);
576 set_bit(flag, &sta->_flags);
579 static inline void clear_sta_flag(struct sta_info *sta,
580 enum ieee80211_sta_info_flags flag)
582 WARN_ON(flag == WLAN_STA_AUTH ||
583 flag == WLAN_STA_ASSOC ||
584 flag == WLAN_STA_AUTHORIZED);
585 clear_bit(flag, &sta->_flags);
588 static inline int test_sta_flag(struct sta_info *sta,
589 enum ieee80211_sta_info_flags flag)
591 return test_bit(flag, &sta->_flags);
594 static inline int test_and_clear_sta_flag(struct sta_info *sta,
595 enum ieee80211_sta_info_flags flag)
597 WARN_ON(flag == WLAN_STA_AUTH ||
598 flag == WLAN_STA_ASSOC ||
599 flag == WLAN_STA_AUTHORIZED);
600 return test_and_clear_bit(flag, &sta->_flags);
603 static inline int test_and_set_sta_flag(struct sta_info *sta,
604 enum ieee80211_sta_info_flags flag)
606 WARN_ON(flag == WLAN_STA_AUTH ||
607 flag == WLAN_STA_ASSOC ||
608 flag == WLAN_STA_AUTHORIZED);
609 return test_and_set_bit(flag, &sta->_flags);
612 int sta_info_move_state(struct sta_info *sta,
613 enum ieee80211_sta_state new_state);
615 static inline void sta_info_pre_move_state(struct sta_info *sta,
616 enum ieee80211_sta_state new_state)
620 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
622 ret = sta_info_move_state(sta, new_state);
627 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
628 struct tid_ampdu_tx *tid_tx);
630 static inline struct tid_ampdu_tx *
631 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
633 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
634 lockdep_is_held(&sta->lock) ||
635 lockdep_is_held(&sta->ampdu_mlme.mtx));
638 /* Maximum number of frames to buffer per power saving station per AC */
639 #define STA_MAX_TX_BUFFER 64
641 /* Minimum buffered frame expiry time. If STA uses listen interval that is
642 * smaller than this value, the minimum value here is used instead. */
643 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
645 /* How often station data is cleaned up (e.g., expiration of buffered frames)
647 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
649 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
653 * Get a STA info, must be under RCU read lock.
655 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
658 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
661 #define for_each_sta_info(local, _addr, _sta, _tmp) \
662 rhl_for_each_entry_rcu(_sta, _tmp, \
663 sta_info_hash_lookup(local, _addr), hash_node)
666 * Get STA info by index, BROKEN!
668 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
671 * Create a new STA info, caller owns returned structure
672 * until sta_info_insert().
674 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
675 const u8 *addr, gfp_t gfp);
677 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
680 * Insert STA info into hash table/list, returns zero or a
681 * -EEXIST if (if the same MAC address is already present).
683 * Calling the non-rcu version makes the caller relinquish,
684 * the _rcu version calls read_lock_rcu() and must be called
687 int sta_info_insert(struct sta_info *sta);
688 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
690 int __must_check __sta_info_destroy(struct sta_info *sta);
691 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
693 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
696 void sta_info_recalc_tim(struct sta_info *sta);
698 int sta_info_init(struct ieee80211_local *local);
699 void sta_info_stop(struct ieee80211_local *local);
702 * sta_info_flush - flush matching STA entries from the STA table
704 * Returns the number of removed STA entries.
706 * @sdata: sdata to remove all stations from
707 * @vlans: if the given interface is an AP interface, also flush VLANs
709 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
711 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
713 return __sta_info_flush(sdata, false);
716 void sta_set_rate_info_tx(struct sta_info *sta,
717 const struct ieee80211_tx_rate *rate,
718 struct rate_info *rinfo);
719 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo);
721 u32 sta_get_expected_throughput(struct sta_info *sta);
723 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
724 unsigned long exp_time);
725 u8 sta_info_tx_streams(struct sta_info *sta);
727 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
728 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
729 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
731 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
733 enum sta_stats_type {
734 STA_STATS_RATE_TYPE_INVALID = 0,
735 STA_STATS_RATE_TYPE_LEGACY,
736 STA_STATS_RATE_TYPE_HT,
737 STA_STATS_RATE_TYPE_VHT,
740 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
741 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
742 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
743 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
744 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
745 #define STA_STATS_FIELD_BW GENMASK(11, 8)
746 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
747 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
749 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
750 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
752 #define STA_STATS_RATE_INVALID 0
754 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
758 r = STA_STATS_FIELD(BW, s->bw);
760 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
761 r |= STA_STATS_FIELD(SGI, 1);
763 switch (s->encoding) {
765 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
766 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
767 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
770 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
771 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
774 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
775 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
776 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
780 return STA_STATS_RATE_INVALID;
786 #endif /* STA_INFO_H */