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 DECLARE_EWMA(avg_signal, 10, 8)
123 enum ieee80211_agg_stop_reason {
125 AGG_STOP_LOCAL_REQUEST,
126 AGG_STOP_PEER_REQUEST,
127 AGG_STOP_DESTROY_STA,
130 /* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */
131 #define AIRTIME_USE_TX BIT(0)
132 #define AIRTIME_USE_RX BIT(1)
134 struct airtime_info {
143 * struct tid_ampdu_tx - TID aggregation information (Tx).
145 * @rcu_head: rcu head for freeing structure
146 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
147 * @addba_resp_timer: timer for peer's response to addba request
148 * @pending: pending frames queue -- use sta's spinlock to protect
149 * @sta: station we are attached to
150 * @dialog_token: dialog token for aggregation session
151 * @timeout: session timeout value to be filled in ADDBA requests
153 * @state: session state (see above)
154 * @last_tx: jiffies of last tx activity
155 * @stop_initiator: initiator of a session stop
156 * @tx_stop: TX DelBA frame when stopping
157 * @buf_size: reorder buffer size at receiver
158 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
159 * @bar_pending: BAR needs to be re-sent
160 * @amsdu: support A-MSDU withing A-MDPU
162 * This structure's lifetime is managed by RCU, assignments to
163 * the array holding it must hold the aggregation mutex.
165 * The TX path can access it under RCU lock-free if, and
166 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
167 * set. Otherwise, the TX path must also acquire the spinlock
168 * and re-check the state, see comments in the tx code
171 struct tid_ampdu_tx {
172 struct rcu_head rcu_head;
173 struct timer_list session_timer;
174 struct timer_list addba_resp_timer;
175 struct sk_buff_head pending;
176 struct sta_info *sta;
178 unsigned long last_tx;
192 * struct tid_ampdu_rx - TID aggregation information (Rx).
194 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
195 * A-MSDU with individually reported subframes.
196 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
197 * the reorder buffer that should be ignored when releasing frames
198 * @reorder_time: jiffies when skb was added
199 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
200 * @reorder_timer: releases expired frames from the reorder buffer.
201 * @sta: station we are attached to
202 * @last_rx: jiffies of last rx activity
203 * @head_seq_num: head sequence number in reordering buffer.
204 * @stored_mpdu_num: number of MPDUs in reordering buffer
205 * @ssn: Starting Sequence Number expected to be aggregated.
206 * @buf_size: buffer size for incoming A-MPDUs
207 * @timeout: reset timer value (in TUs).
209 * @rcu_head: RCU head used for freeing this struct
210 * @reorder_lock: serializes access to reorder buffer, see below.
211 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
213 * @removed: this session is removed (but might have been found due to RCU)
214 * @started: this session has started (head ssn or higher was received)
216 * This structure's lifetime is managed by RCU, assignments to
217 * the array holding it must hold the aggregation mutex.
219 * The @reorder_lock is used to protect the members of this
220 * struct, except for @timeout, @buf_size and @dialog_token,
221 * which are constant across the lifetime of the struct (the
222 * dialog token being used only for debugging).
224 struct tid_ampdu_rx {
225 struct rcu_head rcu_head;
226 spinlock_t reorder_lock;
227 u64 reorder_buf_filtered;
228 struct sk_buff_head *reorder_buf;
229 unsigned long *reorder_time;
230 struct sta_info *sta;
231 struct timer_list session_timer;
232 struct timer_list reorder_timer;
233 unsigned long last_rx;
246 * struct sta_ampdu_mlme - STA aggregation information.
248 * @mtx: mutex to protect all TX data (except non-NULL assignments
249 * to tid_tx[idx], which are protected by the sta spinlock)
250 * tid_start_tx is also protected by sta->lock.
251 * @tid_rx: aggregation info for Rx per TID -- RCU protected
252 * @tid_rx_token: dialog tokens for valid aggregation sessions
253 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
254 * RX timer expired until the work for it runs
255 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
256 * driver requested to close until the work for it runs
257 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
258 * to be treated as started/stopped due to offloading
259 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
260 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
261 * unexpected aggregation related frames outside a session
262 * @work: work struct for starting/stopping aggregation
263 * @tid_tx: aggregation info for Tx per TID
264 * @tid_start_tx: sessions where start was requested
265 * @last_addba_req_time: timestamp of the last addBA request.
266 * @addba_req_num: number of times addBA request has been sent.
267 * @dialog_token_allocator: dialog token enumerator for each new session;
269 struct sta_ampdu_mlme {
272 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
273 u8 tid_rx_token[IEEE80211_NUM_TIDS];
274 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
275 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
276 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
277 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
278 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
280 struct work_struct work;
281 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
282 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
283 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
284 u8 addba_req_num[IEEE80211_NUM_TIDS];
285 u8 dialog_token_allocator;
289 /* Value to indicate no TID reservation */
290 #define IEEE80211_TID_UNRESERVED 0xff
292 #define IEEE80211_FAST_XMIT_MAX_IV 18
295 * struct ieee80211_fast_tx - TX fastpath information
296 * @key: key to use for hw crypto
297 * @hdr: the 802.11 header to put with the frame
298 * @hdr_len: actual 802.11 header length
299 * @sa_offs: offset of the SA
300 * @da_offs: offset of the DA
301 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
302 * @band: band this will be transmitted on, for tx_info
303 * @rcu_head: RCU head to free this struct
305 * This struct is small enough so that the common case (maximum crypto
306 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
309 struct ieee80211_fast_tx {
310 struct ieee80211_key *key;
312 u8 sa_offs, da_offs, pn_offs;
314 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
315 sizeof(rfc1042_header)] __aligned(2);
317 struct rcu_head rcu_head;
321 * struct ieee80211_fast_rx - RX fastpath information
322 * @dev: netdevice for reporting the SKB
323 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
324 * @vif_addr: interface address
325 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
326 * @control_port_protocol: control port protocol copied from sdata
327 * @expected_ds_bits: from/to DS bits expected
328 * @icv_len: length of the MIC if present
329 * @key: bool indicating encryption is expected (key is set)
330 * @sta_notify: notify the MLME code (once)
331 * @internal_forward: forward froms internally on AP/VLAN type interfaces
332 * @uses_rss: copy of USES_RSS hw flag
333 * @da_offs: offset of the DA in the header (for header conversion)
334 * @sa_offs: offset of the SA in the header (for header conversion)
335 * @rcu_head: RCU head for freeing this structure
337 struct ieee80211_fast_rx {
338 struct net_device *dev;
339 enum nl80211_iftype vif_type;
340 u8 vif_addr[ETH_ALEN] __aligned(2);
341 u8 rfc1042_hdr[6] __aligned(2);
342 __be16 control_port_protocol;
343 __le16 expected_ds_bits;
351 struct rcu_head rcu_head;
354 /* we use only values in the range 0-100, so pick a large precision */
355 DECLARE_EWMA(mesh_fail_avg, 20, 8)
356 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16)
359 * struct mesh_sta - mesh STA information
360 * @plink_lock: serialize access to plink fields
361 * @llid: Local link ID
362 * @plid: Peer link ID
363 * @aid: local aid supplied by peer
364 * @reason: Cancel reason on PLINK_HOLDING state
365 * @plink_retries: Retries in establishment
366 * @plink_state: peer link state
367 * @plink_timeout: timeout of peer link
368 * @plink_timer: peer link watch timer
369 * @plink_sta: peer link watch timer's sta_info
370 * @t_offset: timing offset relative to this host
371 * @t_offset_setpoint: reference timing offset of this sta to be used when
372 * calculating clockdrift
373 * @local_pm: local link-specific power save mode
374 * @peer_pm: peer-specific power save mode towards local STA
375 * @nonpeer_pm: STA power save mode towards non-peer neighbors
376 * @processed_beacon: set to true after peer rates and capabilities are
378 * @connected_to_gate: true if mesh STA has a path to a mesh gate
379 * @fail_avg: moving percentage of failed MSDUs
380 * @tx_rate_avg: moving average of tx bitrate
383 struct timer_list plink_timer;
384 struct sta_info *plink_sta;
387 s64 t_offset_setpoint;
389 spinlock_t plink_lock;
396 bool processed_beacon;
397 bool connected_to_gate;
399 enum nl80211_plink_state plink_state;
402 /* mesh power save */
403 enum nl80211_mesh_power_mode local_pm;
404 enum nl80211_mesh_power_mode peer_pm;
405 enum nl80211_mesh_power_mode nonpeer_pm;
407 /* moving percentage of failed MSDUs */
408 struct ewma_mesh_fail_avg fail_avg;
409 /* moving average of tx bitrate */
410 struct ewma_mesh_tx_rate_avg tx_rate_avg;
413 DECLARE_EWMA(signal, 10, 8)
415 struct ieee80211_sta_rx_stats {
416 unsigned long packets;
417 unsigned long last_rx;
418 unsigned long num_duplicates;
419 unsigned long fragments;
420 unsigned long dropped;
423 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
425 struct u64_stats_sync syncp;
427 u64 msdu[IEEE80211_NUM_TIDS + 1];
431 * The bandwidth threshold below which the per-station CoDel parameters will be
432 * scaled to be more lenient (to prevent starvation of slow stations). This
433 * value will be scaled by the number of active stations when it is being
436 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
439 * struct sta_info - STA information
441 * This structure collects information about a station that
442 * mac80211 is communicating with.
444 * @list: global linked list entry
445 * @free_list: list entry for keeping track of stations to free
446 * @hash_node: hash node for rhashtable
447 * @addr: station's MAC address - duplicated from public part to
448 * let the hash table work with just a single cacheline
449 * @local: pointer to the global information
450 * @sdata: virtual interface this station belongs to
451 * @ptk: peer keys negotiated with this station, if any
452 * @ptk_idx: last installed peer key index
453 * @gtk: group keys negotiated with this station, if any
454 * @rate_ctrl: rate control algorithm reference
455 * @rate_ctrl_lock: spinlock used to protect rate control data
456 * (data inside the algorithm, so serializes calls there)
457 * @rate_ctrl_priv: rate control private per-STA pointer
458 * @lock: used for locking all fields that require locking, see comments
459 * in the header file.
460 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
461 * @listen_interval: listen interval of this station, when we're acting as AP
462 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
463 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
464 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
465 * when it leaves power saving state or polls
466 * @tx_filtered: buffers (per AC) of frames we already tried to
467 * transmit but were filtered by hardware due to STA having
468 * entered power saving state, these are also delivered to
469 * the station when it leaves powersave or polls for frames
470 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
471 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
472 * @last_connected: time (in seconds) when a station got connected
473 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
474 * plus one for non-QoS frames)
475 * @tid_seq: per-TID sequence numbers for sending to this STA
476 * @airtime: per-AC struct airtime_info describing airtime statistics for this
478 * @airtime_weight: station weight for airtime fairness calculation purposes
479 * @ampdu_mlme: A-MPDU state machine state
480 * @mesh: mesh STA information
481 * @debugfs_dir: debug filesystem directory dentry
482 * @dead: set to true when sta is unlinked
483 * @removed: set to true when sta is being removed from sta_list
484 * @uploaded: set to true when sta is uploaded to the driver
485 * @sta: station information we share with the driver
486 * @sta_state: duplicates information about station state (for debug)
487 * @rcu_head: RCU head used for freeing this station struct
488 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
489 * taken from HT/VHT capabilities or VHT operating mode notification
490 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
492 * @cipher_scheme: optional cipher scheme for this station
493 * @cparams: CoDel parameters for this station.
494 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
495 * @fast_tx: TX fastpath information
496 * @fast_rx: RX fastpath information
497 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
499 * @tx_stats: TX statistics
500 * @tx_stats.packets: # of packets transmitted
501 * @tx_stats.bytes: # of bytes in all packets transmitted
502 * @tx_stats.last_rate: last TX rate
503 * @tx_stats.msdu: # of transmitted MSDUs per TID
504 * @rx_stats: RX statistics
505 * @rx_stats_avg: averaged RX statistics
506 * @rx_stats_avg.signal: averaged signal
507 * @rx_stats_avg.chain_signal: averaged per-chain signal
508 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
509 * this (by advertising the USES_RSS hw flag)
510 * @status_stats: TX status statistics
511 * @status_stats.filtered: # of filtered frames
512 * @status_stats.retry_failed: # of frames that failed after retry
513 * @status_stats.retry_count: # of retries attempted
514 * @status_stats.lost_packets: # of lost packets
515 * @status_stats.last_tdls_pkt_time: timestamp of last TDLS packet
516 * @status_stats.msdu_retries: # of MSDU retries
517 * @status_stats.msdu_failed: # of failed MSDUs
518 * @status_stats.last_ack: last ack timestamp (jiffies)
519 * @status_stats.last_ack_signal: last ACK signal
520 * @status_stats.ack_signal_filled: last ACK signal validity
521 * @status_stats.avg_ack_signal: average ACK signal
524 /* General information, mostly static */
525 struct list_head list, free_list;
526 struct rcu_head rcu_head;
527 struct rhlist_head hash_node;
529 struct ieee80211_local *local;
530 struct ieee80211_sub_if_data *sdata;
531 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
532 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
534 struct rate_control_ref *rate_ctrl;
535 void *rate_ctrl_priv;
536 spinlock_t rate_ctrl_lock;
539 struct ieee80211_fast_tx __rcu *fast_tx;
540 struct ieee80211_fast_rx __rcu *fast_rx;
541 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
543 #ifdef CONFIG_MAC80211_MESH
544 struct mesh_sta *mesh;
547 struct work_struct drv_deliver_wk;
556 enum ieee80211_sta_state sta_state;
558 /* use the accessors defined below */
559 unsigned long _flags;
561 /* STA powersave lock and frame queues */
563 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
564 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
565 unsigned long driver_buffered_tids;
566 unsigned long txq_buffered_tids;
570 /* Updated from RX path only, no locking requirements */
571 struct ieee80211_sta_rx_stats rx_stats;
573 struct ewma_signal signal;
574 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
577 /* Plus 1 for non-QoS frames */
578 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
580 /* Updated from TX status path only, no locking requirements */
582 unsigned long filtered;
583 unsigned long retry_failed, retry_count;
584 unsigned int lost_packets;
585 unsigned long last_tdls_pkt_time;
586 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
587 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
588 unsigned long last_ack;
590 bool ack_signal_filled;
591 struct ewma_avg_signal avg_ack_signal;
594 /* Updated from TX path only, no locking requirements */
596 u64 packets[IEEE80211_NUM_ACS];
597 u64 bytes[IEEE80211_NUM_ACS];
598 struct ieee80211_tx_rate last_rate;
599 u64 msdu[IEEE80211_NUM_TIDS + 1];
601 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
603 struct airtime_info airtime[IEEE80211_NUM_ACS];
607 * Aggregation information, locked with lock.
609 struct sta_ampdu_mlme ampdu_mlme;
611 #ifdef CONFIG_MAC80211_DEBUGFS
612 struct dentry *debugfs_dir;
615 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
617 enum ieee80211_smps_mode known_smps_mode;
618 const struct ieee80211_cipher_scheme *cipher_scheme;
620 struct codel_params cparams;
624 struct cfg80211_chan_def tdls_chandef;
627 struct ieee80211_sta sta;
630 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
632 #ifdef CONFIG_MAC80211_MESH
633 return sta->mesh->plink_state;
635 return NL80211_PLINK_LISTEN;
638 static inline void set_sta_flag(struct sta_info *sta,
639 enum ieee80211_sta_info_flags flag)
641 WARN_ON(flag == WLAN_STA_AUTH ||
642 flag == WLAN_STA_ASSOC ||
643 flag == WLAN_STA_AUTHORIZED);
644 set_bit(flag, &sta->_flags);
647 static inline void clear_sta_flag(struct sta_info *sta,
648 enum ieee80211_sta_info_flags flag)
650 WARN_ON(flag == WLAN_STA_AUTH ||
651 flag == WLAN_STA_ASSOC ||
652 flag == WLAN_STA_AUTHORIZED);
653 clear_bit(flag, &sta->_flags);
656 static inline int test_sta_flag(struct sta_info *sta,
657 enum ieee80211_sta_info_flags flag)
659 return test_bit(flag, &sta->_flags);
662 static inline int test_and_clear_sta_flag(struct sta_info *sta,
663 enum ieee80211_sta_info_flags flag)
665 WARN_ON(flag == WLAN_STA_AUTH ||
666 flag == WLAN_STA_ASSOC ||
667 flag == WLAN_STA_AUTHORIZED);
668 return test_and_clear_bit(flag, &sta->_flags);
671 static inline int test_and_set_sta_flag(struct sta_info *sta,
672 enum ieee80211_sta_info_flags flag)
674 WARN_ON(flag == WLAN_STA_AUTH ||
675 flag == WLAN_STA_ASSOC ||
676 flag == WLAN_STA_AUTHORIZED);
677 return test_and_set_bit(flag, &sta->_flags);
680 int sta_info_move_state(struct sta_info *sta,
681 enum ieee80211_sta_state new_state);
683 static inline void sta_info_pre_move_state(struct sta_info *sta,
684 enum ieee80211_sta_state new_state)
688 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
690 ret = sta_info_move_state(sta, new_state);
695 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
696 struct tid_ampdu_tx *tid_tx);
698 static inline struct tid_ampdu_tx *
699 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
701 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
702 lockdep_is_held(&sta->lock) ||
703 lockdep_is_held(&sta->ampdu_mlme.mtx));
706 /* Maximum number of frames to buffer per power saving station per AC */
707 #define STA_MAX_TX_BUFFER 64
709 /* Minimum buffered frame expiry time. If STA uses listen interval that is
710 * smaller than this value, the minimum value here is used instead. */
711 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
713 /* How often station data is cleaned up (e.g., expiration of buffered frames)
715 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
717 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
721 * Get a STA info, must be under RCU read lock.
723 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
726 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
729 #define for_each_sta_info(local, _addr, _sta, _tmp) \
730 rhl_for_each_entry_rcu(_sta, _tmp, \
731 sta_info_hash_lookup(local, _addr), hash_node)
734 * Get STA info by index, BROKEN!
736 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
739 * Create a new STA info, caller owns returned structure
740 * until sta_info_insert().
742 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
743 const u8 *addr, gfp_t gfp);
745 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
748 * Insert STA info into hash table/list, returns zero or a
749 * -EEXIST if (if the same MAC address is already present).
751 * Calling the non-rcu version makes the caller relinquish,
752 * the _rcu version calls read_lock_rcu() and must be called
755 int sta_info_insert(struct sta_info *sta);
756 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
758 int __must_check __sta_info_destroy(struct sta_info *sta);
759 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
761 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
764 void sta_info_recalc_tim(struct sta_info *sta);
766 int sta_info_init(struct ieee80211_local *local);
767 void sta_info_stop(struct ieee80211_local *local);
770 * sta_info_flush - flush matching STA entries from the STA table
772 * Returns the number of removed STA entries.
774 * @sdata: sdata to remove all stations from
775 * @vlans: if the given interface is an AP interface, also flush VLANs
777 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
779 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
781 return __sta_info_flush(sdata, false);
784 void sta_set_rate_info_tx(struct sta_info *sta,
785 const struct ieee80211_tx_rate *rate,
786 struct rate_info *rinfo);
787 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
790 u32 sta_get_expected_throughput(struct sta_info *sta);
792 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
793 unsigned long exp_time);
794 u8 sta_info_tx_streams(struct sta_info *sta);
796 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
797 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
798 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
800 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
802 enum sta_stats_type {
803 STA_STATS_RATE_TYPE_INVALID = 0,
804 STA_STATS_RATE_TYPE_LEGACY,
805 STA_STATS_RATE_TYPE_HT,
806 STA_STATS_RATE_TYPE_VHT,
807 STA_STATS_RATE_TYPE_HE,
810 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
811 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
812 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
813 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
814 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
815 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
816 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
817 #define STA_STATS_FIELD_BW GENMASK(11, 8)
818 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
819 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
820 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16)
821 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19)
822 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21)
824 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
825 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
827 #define STA_STATS_RATE_INVALID 0
829 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
833 r = STA_STATS_FIELD(BW, s->bw);
835 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
836 r |= STA_STATS_FIELD(SGI, 1);
838 switch (s->encoding) {
840 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
841 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
842 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
845 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
846 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
849 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
850 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
851 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
854 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
855 r |= STA_STATS_FIELD(HE_NSS, s->nss);
856 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
857 r |= STA_STATS_FIELD(HE_GI, s->he_gi);
858 r |= STA_STATS_FIELD(HE_RU, s->he_ru);
859 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
863 return STA_STATS_RATE_INVALID;
869 #endif /* STA_INFO_H */