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
118 #define HT_AGG_STATE_START_CB 6
119 #define HT_AGG_STATE_STOP_CB 7
121 enum ieee80211_agg_stop_reason {
123 AGG_STOP_LOCAL_REQUEST,
124 AGG_STOP_PEER_REQUEST,
125 AGG_STOP_DESTROY_STA,
129 * struct tid_ampdu_tx - TID aggregation information (Tx).
131 * @rcu_head: rcu head for freeing structure
132 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
133 * @addba_resp_timer: timer for peer's response to addba request
134 * @pending: pending frames queue -- use sta's spinlock to protect
135 * @dialog_token: dialog token for aggregation session
136 * @timeout: session timeout value to be filled in ADDBA requests
137 * @state: session state (see above)
138 * @last_tx: jiffies of last tx activity
139 * @stop_initiator: initiator of a session stop
140 * @tx_stop: TX DelBA frame when stopping
141 * @buf_size: reorder buffer size at receiver
142 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
143 * @bar_pending: BAR needs to be re-sent
144 * @amsdu: support A-MSDU withing A-MDPU
146 * This structure's lifetime is managed by RCU, assignments to
147 * the array holding it must hold the aggregation mutex.
149 * The TX path can access it under RCU lock-free if, and
150 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
151 * set. Otherwise, the TX path must also acquire the spinlock
152 * and re-check the state, see comments in the tx code
155 struct tid_ampdu_tx {
156 struct rcu_head rcu_head;
157 struct timer_list session_timer;
158 struct timer_list addba_resp_timer;
159 struct sk_buff_head pending;
161 unsigned long last_tx;
174 * struct tid_ampdu_rx - TID aggregation information (Rx).
176 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
177 * A-MSDU with individually reported subframes.
178 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
179 * the reorder buffer that should be ignored when releasing frames
180 * @reorder_time: jiffies when skb was added
181 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
182 * @reorder_timer: releases expired frames from the reorder buffer.
183 * @last_rx: jiffies of last rx activity
184 * @head_seq_num: head sequence number in reordering buffer.
185 * @stored_mpdu_num: number of MPDUs in reordering buffer
186 * @ssn: Starting Sequence Number expected to be aggregated.
187 * @buf_size: buffer size for incoming A-MPDUs
188 * @timeout: reset timer value (in TUs).
189 * @rcu_head: RCU head used for freeing this struct
190 * @reorder_lock: serializes access to reorder buffer, see below.
191 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
193 * @removed: this session is removed (but might have been found due to RCU)
194 * @started: this session has started (head ssn or higher was received)
196 * This structure's lifetime is managed by RCU, assignments to
197 * the array holding it must hold the aggregation mutex.
199 * The @reorder_lock is used to protect the members of this
200 * struct, except for @timeout, @buf_size and @dialog_token,
201 * which are constant across the lifetime of the struct (the
202 * dialog token being used only for debugging).
204 struct tid_ampdu_rx {
205 struct rcu_head rcu_head;
206 spinlock_t reorder_lock;
207 u64 reorder_buf_filtered;
208 struct sk_buff_head *reorder_buf;
209 unsigned long *reorder_time;
210 struct timer_list session_timer;
211 struct timer_list reorder_timer;
212 unsigned long last_rx;
224 * struct sta_ampdu_mlme - STA aggregation information.
226 * @mtx: mutex to protect all TX data (except non-NULL assignments
227 * to tid_tx[idx], which are protected by the sta spinlock)
228 * tid_start_tx is also protected by sta->lock.
229 * @tid_rx: aggregation info for Rx per TID -- RCU protected
230 * @tid_rx_token: dialog tokens for valid aggregation sessions
231 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
232 * RX timer expired until the work for it runs
233 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
234 * driver requested to close until the work for it runs
235 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
236 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
237 * unexpected aggregation related frames outside a session
238 * @work: work struct for starting/stopping aggregation
239 * @tid_tx: aggregation info for Tx per TID
240 * @tid_start_tx: sessions where start was requested
241 * @last_addba_req_time: timestamp of the last addBA request.
242 * @addba_req_num: number of times addBA request has been sent.
243 * @dialog_token_allocator: dialog token enumerator for each new session;
245 struct sta_ampdu_mlme {
248 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
249 u8 tid_rx_token[IEEE80211_NUM_TIDS];
250 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
251 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
252 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
253 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
255 struct work_struct work;
256 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
257 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
258 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
259 u8 addba_req_num[IEEE80211_NUM_TIDS];
260 u8 dialog_token_allocator;
264 /* Value to indicate no TID reservation */
265 #define IEEE80211_TID_UNRESERVED 0xff
267 #define IEEE80211_FAST_XMIT_MAX_IV 18
270 * struct ieee80211_fast_tx - TX fastpath information
271 * @key: key to use for hw crypto
272 * @hdr: the 802.11 header to put with the frame
273 * @hdr_len: actual 802.11 header length
274 * @sa_offs: offset of the SA
275 * @da_offs: offset of the DA
276 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
277 * @band: band this will be transmitted on, for tx_info
278 * @rcu_head: RCU head to free this struct
280 * This struct is small enough so that the common case (maximum crypto
281 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
284 struct ieee80211_fast_tx {
285 struct ieee80211_key *key;
287 u8 sa_offs, da_offs, pn_offs;
289 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
290 sizeof(rfc1042_header)] __aligned(2);
292 struct rcu_head rcu_head;
296 * struct ieee80211_fast_rx - RX fastpath information
297 * @dev: netdevice for reporting the SKB
298 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
299 * @vif_addr: interface address
300 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
301 * @control_port_protocol: control port protocol copied from sdata
302 * @expected_ds_bits: from/to DS bits expected
303 * @icv_len: length of the MIC if present
304 * @key: bool indicating encryption is expected (key is set)
305 * @sta_notify: notify the MLME code (once)
306 * @internal_forward: forward froms internally on AP/VLAN type interfaces
307 * @uses_rss: copy of USES_RSS hw flag
308 * @da_offs: offset of the DA in the header (for header conversion)
309 * @sa_offs: offset of the SA in the header (for header conversion)
310 * @rcu_head: RCU head for freeing this structure
312 struct ieee80211_fast_rx {
313 struct net_device *dev;
314 enum nl80211_iftype vif_type;
315 u8 vif_addr[ETH_ALEN] __aligned(2);
316 u8 rfc1042_hdr[6] __aligned(2);
317 __be16 control_port_protocol;
318 __le16 expected_ds_bits;
326 struct rcu_head rcu_head;
330 * struct mesh_sta - mesh STA information
331 * @plink_lock: serialize access to plink fields
332 * @llid: Local link ID
333 * @plid: Peer link ID
334 * @aid: local aid supplied by peer
335 * @reason: Cancel reason on PLINK_HOLDING state
336 * @plink_retries: Retries in establishment
337 * @plink_state: peer link state
338 * @plink_timeout: timeout of peer link
339 * @plink_timer: peer link watch timer
340 * @t_offset: timing offset relative to this host
341 * @t_offset_setpoint: reference timing offset of this sta to be used when
342 * calculating clockdrift
343 * @local_pm: local link-specific power save mode
344 * @peer_pm: peer-specific power save mode towards local STA
345 * @nonpeer_pm: STA power save mode towards non-peer neighbors
346 * @processed_beacon: set to true after peer rates and capabilities are
348 * @fail_avg: moving percentage of failed MSDUs
351 struct timer_list plink_timer;
354 s64 t_offset_setpoint;
356 spinlock_t plink_lock;
363 bool processed_beacon;
365 enum nl80211_plink_state plink_state;
368 /* mesh power save */
369 enum nl80211_mesh_power_mode local_pm;
370 enum nl80211_mesh_power_mode peer_pm;
371 enum nl80211_mesh_power_mode nonpeer_pm;
373 /* moving percentage of failed MSDUs */
374 unsigned int fail_avg;
377 DECLARE_EWMA(signal, 1024, 8)
379 struct ieee80211_sta_rx_stats {
380 unsigned long packets;
381 unsigned long last_rx;
382 unsigned long num_duplicates;
383 unsigned long fragments;
384 unsigned long dropped;
387 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
389 struct u64_stats_sync syncp;
391 u64 msdu[IEEE80211_NUM_TIDS + 1];
395 * struct sta_info - STA information
397 * This structure collects information about a station that
398 * mac80211 is communicating with.
400 * @list: global linked list entry
401 * @free_list: list entry for keeping track of stations to free
402 * @hash_node: hash node for rhashtable
403 * @addr: station's MAC address - duplicated from public part to
404 * let the hash table work with just a single cacheline
405 * @local: pointer to the global information
406 * @sdata: virtual interface this station belongs to
407 * @ptk: peer keys negotiated with this station, if any
408 * @ptk_idx: last installed peer key index
409 * @gtk: group keys negotiated with this station, if any
410 * @rate_ctrl: rate control algorithm reference
411 * @rate_ctrl_lock: spinlock used to protect rate control data
412 * (data inside the algorithm, so serializes calls there)
413 * @rate_ctrl_priv: rate control private per-STA pointer
414 * @lock: used for locking all fields that require locking, see comments
415 * in the header file.
416 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
417 * @listen_interval: listen interval of this station, when we're acting as AP
418 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
419 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
420 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
421 * when it leaves power saving state or polls
422 * @tx_filtered: buffers (per AC) of frames we already tried to
423 * transmit but were filtered by hardware due to STA having
424 * entered power saving state, these are also delivered to
425 * the station when it leaves powersave or polls for frames
426 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
427 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
428 * @last_connected: time (in seconds) when a station got connected
429 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
430 * plus one for non-QoS frames)
431 * @tid_seq: per-TID sequence numbers for sending to this STA
432 * @ampdu_mlme: A-MPDU state machine state
433 * @timer_to_tid: identity mapping to ID timers
434 * @mesh: mesh STA information
435 * @debugfs_dir: debug filesystem directory dentry
436 * @dead: set to true when sta is unlinked
437 * @removed: set to true when sta is being removed from sta_list
438 * @uploaded: set to true when sta is uploaded to the driver
439 * @sta: station information we share with the driver
440 * @sta_state: duplicates information about station state (for debug)
441 * @rcu_head: RCU head used for freeing this station struct
442 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
443 * taken from HT/VHT capabilities or VHT operating mode notification
444 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
446 * @cipher_scheme: optional cipher scheme for this station
447 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
448 * @fast_tx: TX fastpath information
449 * @fast_rx: RX fastpath information
450 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
452 * @tx_stats: TX statistics
453 * @rx_stats: RX statistics
454 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
455 * this (by advertising the USES_RSS hw flag)
456 * @status_stats: TX status statistics
459 /* General information, mostly static */
460 struct list_head list, free_list;
461 struct rcu_head rcu_head;
462 struct rhlist_head hash_node;
464 struct ieee80211_local *local;
465 struct ieee80211_sub_if_data *sdata;
466 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
467 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
469 struct rate_control_ref *rate_ctrl;
470 void *rate_ctrl_priv;
471 spinlock_t rate_ctrl_lock;
474 struct ieee80211_fast_tx __rcu *fast_tx;
475 struct ieee80211_fast_rx __rcu *fast_rx;
476 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
478 #ifdef CONFIG_MAC80211_MESH
479 struct mesh_sta *mesh;
482 struct work_struct drv_deliver_wk;
491 enum ieee80211_sta_state sta_state;
493 /* use the accessors defined below */
494 unsigned long _flags;
496 /* STA powersave lock and frame queues */
498 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
499 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
500 unsigned long driver_buffered_tids;
501 unsigned long txq_buffered_tids;
505 /* Updated from RX path only, no locking requirements */
506 struct ieee80211_sta_rx_stats rx_stats;
508 struct ewma_signal signal;
509 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
512 /* Plus 1 for non-QoS frames */
513 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
515 /* Updated from TX status path only, no locking requirements */
517 unsigned long filtered;
518 unsigned long retry_failed, retry_count;
519 unsigned int lost_packets;
520 unsigned long last_tdls_pkt_time;
521 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
522 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
523 unsigned long last_ack;
526 /* Updated from TX path only, no locking requirements */
528 u64 packets[IEEE80211_NUM_ACS];
529 u64 bytes[IEEE80211_NUM_ACS];
530 struct ieee80211_tx_rate last_rate;
531 u64 msdu[IEEE80211_NUM_TIDS + 1];
533 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
536 * Aggregation information, locked with lock.
538 struct sta_ampdu_mlme ampdu_mlme;
539 u8 timer_to_tid[IEEE80211_NUM_TIDS];
541 #ifdef CONFIG_MAC80211_DEBUGFS
542 struct dentry *debugfs_dir;
545 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
547 enum ieee80211_smps_mode known_smps_mode;
548 const struct ieee80211_cipher_scheme *cipher_scheme;
552 struct cfg80211_chan_def tdls_chandef;
555 struct ieee80211_sta sta;
558 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
560 #ifdef CONFIG_MAC80211_MESH
561 return sta->mesh->plink_state;
563 return NL80211_PLINK_LISTEN;
566 static inline void set_sta_flag(struct sta_info *sta,
567 enum ieee80211_sta_info_flags flag)
569 WARN_ON(flag == WLAN_STA_AUTH ||
570 flag == WLAN_STA_ASSOC ||
571 flag == WLAN_STA_AUTHORIZED);
572 set_bit(flag, &sta->_flags);
575 static inline void clear_sta_flag(struct sta_info *sta,
576 enum ieee80211_sta_info_flags flag)
578 WARN_ON(flag == WLAN_STA_AUTH ||
579 flag == WLAN_STA_ASSOC ||
580 flag == WLAN_STA_AUTHORIZED);
581 clear_bit(flag, &sta->_flags);
584 static inline int test_sta_flag(struct sta_info *sta,
585 enum ieee80211_sta_info_flags flag)
587 return test_bit(flag, &sta->_flags);
590 static inline int test_and_clear_sta_flag(struct sta_info *sta,
591 enum ieee80211_sta_info_flags flag)
593 WARN_ON(flag == WLAN_STA_AUTH ||
594 flag == WLAN_STA_ASSOC ||
595 flag == WLAN_STA_AUTHORIZED);
596 return test_and_clear_bit(flag, &sta->_flags);
599 static inline int test_and_set_sta_flag(struct sta_info *sta,
600 enum ieee80211_sta_info_flags flag)
602 WARN_ON(flag == WLAN_STA_AUTH ||
603 flag == WLAN_STA_ASSOC ||
604 flag == WLAN_STA_AUTHORIZED);
605 return test_and_set_bit(flag, &sta->_flags);
608 int sta_info_move_state(struct sta_info *sta,
609 enum ieee80211_sta_state new_state);
611 static inline void sta_info_pre_move_state(struct sta_info *sta,
612 enum ieee80211_sta_state new_state)
616 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
618 ret = sta_info_move_state(sta, new_state);
623 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
624 struct tid_ampdu_tx *tid_tx);
626 static inline struct tid_ampdu_tx *
627 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
629 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
630 lockdep_is_held(&sta->lock) ||
631 lockdep_is_held(&sta->ampdu_mlme.mtx));
634 /* Maximum number of frames to buffer per power saving station per AC */
635 #define STA_MAX_TX_BUFFER 64
637 /* Minimum buffered frame expiry time. If STA uses listen interval that is
638 * smaller than this value, the minimum value here is used instead. */
639 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
641 /* How often station data is cleaned up (e.g., expiration of buffered frames)
643 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
645 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
649 * Get a STA info, must be under RCU read lock.
651 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
654 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
657 #define for_each_sta_info(local, _addr, _sta, _tmp) \
658 rhl_for_each_entry_rcu(_sta, _tmp, \
659 sta_info_hash_lookup(local, _addr), hash_node)
662 * Get STA info by index, BROKEN!
664 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
667 * Create a new STA info, caller owns returned structure
668 * until sta_info_insert().
670 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
671 const u8 *addr, gfp_t gfp);
673 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
676 * Insert STA info into hash table/list, returns zero or a
677 * -EEXIST if (if the same MAC address is already present).
679 * Calling the non-rcu version makes the caller relinquish,
680 * the _rcu version calls read_lock_rcu() and must be called
683 int sta_info_insert(struct sta_info *sta);
684 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
686 int __must_check __sta_info_destroy(struct sta_info *sta);
687 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
689 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
692 void sta_info_recalc_tim(struct sta_info *sta);
694 int sta_info_init(struct ieee80211_local *local);
695 void sta_info_stop(struct ieee80211_local *local);
698 * sta_info_flush - flush matching STA entries from the STA table
700 * Returns the number of removed STA entries.
702 * @sdata: sdata to remove all stations from
703 * @vlans: if the given interface is an AP interface, also flush VLANs
705 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
707 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
709 return __sta_info_flush(sdata, false);
712 void sta_set_rate_info_tx(struct sta_info *sta,
713 const struct ieee80211_tx_rate *rate,
714 struct rate_info *rinfo);
715 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo);
717 u32 sta_get_expected_throughput(struct sta_info *sta);
719 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
720 unsigned long exp_time);
721 u8 sta_info_tx_streams(struct sta_info *sta);
723 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
724 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
725 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
727 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
729 #define STA_STATS_RATE_INVALID 0
730 #define STA_STATS_RATE_VHT 0x8000
731 #define STA_STATS_RATE_HT 0x4000
732 #define STA_STATS_RATE_LEGACY 0x2000
733 #define STA_STATS_RATE_SGI 0x1000
734 #define STA_STATS_RATE_BW_SHIFT 9
735 #define STA_STATS_RATE_BW_MASK (0x7 << STA_STATS_RATE_BW_SHIFT)
737 static inline u16 sta_stats_encode_rate(struct ieee80211_rx_status *s)
741 if (s->vht_flag & RX_VHT_FLAG_80MHZ)
742 r |= RATE_INFO_BW_80 << STA_STATS_RATE_BW_SHIFT;
743 else if (s->vht_flag & RX_VHT_FLAG_160MHZ)
744 r |= RATE_INFO_BW_160 << STA_STATS_RATE_BW_SHIFT;
745 else if (s->flag & RX_FLAG_40MHZ)
746 r |= RATE_INFO_BW_40 << STA_STATS_RATE_BW_SHIFT;
747 else if (s->flag & RX_FLAG_10MHZ)
748 r |= RATE_INFO_BW_10 << STA_STATS_RATE_BW_SHIFT;
749 else if (s->flag & RX_FLAG_5MHZ)
750 r |= RATE_INFO_BW_5 << STA_STATS_RATE_BW_SHIFT;
752 r |= RATE_INFO_BW_20 << STA_STATS_RATE_BW_SHIFT;
754 if (s->flag & RX_FLAG_SHORT_GI)
755 r |= STA_STATS_RATE_SGI;
757 if (s->flag & RX_FLAG_VHT)
758 r |= STA_STATS_RATE_VHT | (s->vht_nss << 4);
759 else if (s->flag & RX_FLAG_HT)
760 r |= STA_STATS_RATE_HT;
762 r |= STA_STATS_RATE_LEGACY | (s->band << 4);
767 #endif /* STA_INFO_H */