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,
104 WLAN_STA_USES_ENCRYPTION,
109 #define ADDBA_RESP_INTERVAL HZ
110 #define HT_AGG_MAX_RETRIES 15
111 #define HT_AGG_BURST_RETRIES 3
112 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
114 #define HT_AGG_STATE_DRV_READY 0
115 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
116 #define HT_AGG_STATE_OPERATIONAL 2
117 #define HT_AGG_STATE_STOPPING 3
118 #define HT_AGG_STATE_WANT_START 4
119 #define HT_AGG_STATE_WANT_STOP 5
120 #define HT_AGG_STATE_START_CB 6
121 #define HT_AGG_STATE_STOP_CB 7
123 enum ieee80211_agg_stop_reason {
125 AGG_STOP_LOCAL_REQUEST,
126 AGG_STOP_PEER_REQUEST,
127 AGG_STOP_DESTROY_STA,
131 * struct tid_ampdu_tx - TID aggregation information (Tx).
133 * @rcu_head: rcu head for freeing structure
134 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
135 * @addba_resp_timer: timer for peer's response to addba request
136 * @pending: pending frames queue -- use sta's spinlock to protect
137 * @dialog_token: dialog token for aggregation session
138 * @timeout: session timeout value to be filled in ADDBA requests
139 * @state: session state (see above)
140 * @last_tx: jiffies of last tx activity
141 * @stop_initiator: initiator of a session stop
142 * @tx_stop: TX DelBA frame when stopping
143 * @buf_size: reorder buffer size at receiver
144 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
145 * @bar_pending: BAR needs to be re-sent
146 * @amsdu: support A-MSDU withing A-MDPU
148 * This structure's lifetime is managed by RCU, assignments to
149 * the array holding it must hold the aggregation mutex.
151 * The TX path can access it under RCU lock-free if, and
152 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
153 * set. Otherwise, the TX path must also acquire the spinlock
154 * and re-check the state, see comments in the tx code
157 struct tid_ampdu_tx {
158 struct rcu_head rcu_head;
159 struct timer_list session_timer;
160 struct timer_list addba_resp_timer;
161 struct sk_buff_head pending;
163 unsigned long last_tx;
176 * struct tid_ampdu_rx - TID aggregation information (Rx).
178 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
179 * A-MSDU with individually reported subframes.
180 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
181 * the reorder buffer that should be ignored when releasing frames
182 * @reorder_time: jiffies when skb was added
183 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
184 * @reorder_timer: releases expired frames from the reorder buffer.
185 * @last_rx: jiffies of last rx activity
186 * @head_seq_num: head sequence number in reordering buffer.
187 * @stored_mpdu_num: number of MPDUs in reordering buffer
188 * @ssn: Starting Sequence Number expected to be aggregated.
189 * @buf_size: buffer size for incoming A-MPDUs
190 * @timeout: reset timer value (in TUs).
191 * @rcu_head: RCU head used for freeing this struct
192 * @reorder_lock: serializes access to reorder buffer, see below.
193 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
195 * @removed: this session is removed (but might have been found due to RCU)
196 * @started: this session has started (head ssn or higher was received)
198 * This structure's lifetime is managed by RCU, assignments to
199 * the array holding it must hold the aggregation mutex.
201 * The @reorder_lock is used to protect the members of this
202 * struct, except for @timeout, @buf_size and @dialog_token,
203 * which are constant across the lifetime of the struct (the
204 * dialog token being used only for debugging).
206 struct tid_ampdu_rx {
207 struct rcu_head rcu_head;
208 spinlock_t reorder_lock;
209 u64 reorder_buf_filtered;
210 struct sk_buff_head *reorder_buf;
211 unsigned long *reorder_time;
212 struct timer_list session_timer;
213 struct timer_list reorder_timer;
214 unsigned long last_rx;
226 * struct sta_ampdu_mlme - STA aggregation information.
228 * @mtx: mutex to protect all TX data (except non-NULL assignments
229 * to tid_tx[idx], which are protected by the sta spinlock)
230 * tid_start_tx is also protected by sta->lock.
231 * @tid_rx: aggregation info for Rx per TID -- RCU protected
232 * @tid_rx_token: dialog tokens for valid aggregation sessions
233 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
234 * RX timer expired until the work for it runs
235 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
236 * driver requested to close until the work for it runs
237 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
238 * to be treated as started/stopped due to offloading
239 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
240 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
241 * unexpected aggregation related frames outside a session
242 * @work: work struct for starting/stopping aggregation
243 * @tid_tx: aggregation info for Tx per TID
244 * @tid_start_tx: sessions where start was requested
245 * @last_addba_req_time: timestamp of the last addBA request.
246 * @addba_req_num: number of times addBA request has been sent.
247 * @dialog_token_allocator: dialog token enumerator for each new session;
249 struct sta_ampdu_mlme {
252 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
253 u8 tid_rx_token[IEEE80211_NUM_TIDS];
254 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
255 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
256 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
257 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
258 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
260 struct work_struct work;
261 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
262 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
263 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
264 u8 addba_req_num[IEEE80211_NUM_TIDS];
265 u8 dialog_token_allocator;
269 /* Value to indicate no TID reservation */
270 #define IEEE80211_TID_UNRESERVED 0xff
272 #define IEEE80211_FAST_XMIT_MAX_IV 18
275 * struct ieee80211_fast_tx - TX fastpath information
276 * @key: key to use for hw crypto
277 * @hdr: the 802.11 header to put with the frame
278 * @hdr_len: actual 802.11 header length
279 * @sa_offs: offset of the SA
280 * @da_offs: offset of the DA
281 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
282 * @band: band this will be transmitted on, for tx_info
283 * @rcu_head: RCU head to free this struct
285 * This struct is small enough so that the common case (maximum crypto
286 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
289 struct ieee80211_fast_tx {
290 struct ieee80211_key *key;
292 u8 sa_offs, da_offs, pn_offs;
294 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
295 sizeof(rfc1042_header)] __aligned(2);
297 struct rcu_head rcu_head;
301 * struct ieee80211_fast_rx - RX fastpath information
302 * @dev: netdevice for reporting the SKB
303 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
304 * @vif_addr: interface address
305 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
306 * @control_port_protocol: control port protocol copied from sdata
307 * @expected_ds_bits: from/to DS bits expected
308 * @icv_len: length of the MIC if present
309 * @key: bool indicating encryption is expected (key is set)
310 * @sta_notify: notify the MLME code (once)
311 * @internal_forward: forward froms internally on AP/VLAN type interfaces
312 * @uses_rss: copy of USES_RSS hw flag
313 * @da_offs: offset of the DA in the header (for header conversion)
314 * @sa_offs: offset of the SA in the header (for header conversion)
315 * @rcu_head: RCU head for freeing this structure
317 struct ieee80211_fast_rx {
318 struct net_device *dev;
319 enum nl80211_iftype vif_type;
320 u8 vif_addr[ETH_ALEN] __aligned(2);
321 u8 rfc1042_hdr[6] __aligned(2);
322 __be16 control_port_protocol;
323 __le16 expected_ds_bits;
331 struct rcu_head rcu_head;
334 /* we use only values in the range 0-100, so pick a large precision */
335 DECLARE_EWMA(mesh_fail_avg, 20, 8)
338 * struct mesh_sta - mesh STA information
339 * @plink_lock: serialize access to plink fields
340 * @llid: Local link ID
341 * @plid: Peer link ID
342 * @aid: local aid supplied by peer
343 * @reason: Cancel reason on PLINK_HOLDING state
344 * @plink_retries: Retries in establishment
345 * @plink_state: peer link state
346 * @plink_timeout: timeout of peer link
347 * @plink_timer: peer link watch timer
348 * @t_offset: timing offset relative to this host
349 * @t_offset_setpoint: reference timing offset of this sta to be used when
350 * calculating clockdrift
351 * @local_pm: local link-specific power save mode
352 * @peer_pm: peer-specific power save mode towards local STA
353 * @nonpeer_pm: STA power save mode towards non-peer neighbors
354 * @processed_beacon: set to true after peer rates and capabilities are
356 * @fail_avg: moving percentage of failed MSDUs
359 struct timer_list plink_timer;
362 s64 t_offset_setpoint;
364 spinlock_t plink_lock;
371 bool processed_beacon;
373 enum nl80211_plink_state plink_state;
376 /* mesh power save */
377 enum nl80211_mesh_power_mode local_pm;
378 enum nl80211_mesh_power_mode peer_pm;
379 enum nl80211_mesh_power_mode nonpeer_pm;
381 /* moving percentage of failed MSDUs */
382 struct ewma_mesh_fail_avg fail_avg;
385 DECLARE_EWMA(signal, 10, 8)
387 struct ieee80211_sta_rx_stats {
388 unsigned long packets;
389 unsigned long last_rx;
390 unsigned long num_duplicates;
391 unsigned long fragments;
392 unsigned long dropped;
395 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
397 struct u64_stats_sync syncp;
399 u64 msdu[IEEE80211_NUM_TIDS + 1];
403 * IEEE 802.11-2016 (10.6 "Defragmentation") recommends support for "concurrent
404 * reception of at least one MSDU per access category per associated STA"
405 * on APs, or "at least one MSDU per access category" on other interface types.
407 * This limit can be increased by changing this define, at the cost of slower
408 * frame reassembly and increased memory use while fragments are pending.
410 #define IEEE80211_FRAGMENT_MAX 4
412 struct ieee80211_fragment_entry {
413 struct sk_buff_head skb_list;
414 unsigned long first_frag_time;
419 u8 check_sequential_pn:1, /* needed for CCMP/GCMP */
421 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
422 unsigned int key_color;
425 struct ieee80211_fragment_cache {
426 struct ieee80211_fragment_entry entries[IEEE80211_FRAGMENT_MAX];
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 * @ampdu_mlme: A-MPDU state machine state
477 * @timer_to_tid: identity mapping to ID timers
478 * @mesh: mesh STA information
479 * @debugfs_dir: debug filesystem directory dentry
480 * @dead: set to true when sta is unlinked
481 * @removed: set to true when sta is being removed from sta_list
482 * @uploaded: set to true when sta is uploaded to the driver
483 * @sta: station information we share with the driver
484 * @sta_state: duplicates information about station state (for debug)
485 * @rcu_head: RCU head used for freeing this station struct
486 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
487 * taken from HT/VHT capabilities or VHT operating mode notification
488 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
490 * @cipher_scheme: optional cipher scheme for this station
491 * @cparams: CoDel parameters for this station.
492 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
493 * @fast_tx: TX fastpath information
494 * @fast_rx: RX fastpath information
495 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
497 * @tx_stats: TX statistics
498 * @rx_stats: RX statistics
499 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
500 * this (by advertising the USES_RSS hw flag)
501 * @status_stats: TX status statistics
502 * @frags: fragment cache
505 /* General information, mostly static */
506 struct list_head list, free_list;
507 struct rcu_head rcu_head;
508 struct rhlist_head hash_node;
510 struct ieee80211_local *local;
511 struct ieee80211_sub_if_data *sdata;
512 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
513 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
515 struct rate_control_ref *rate_ctrl;
516 void *rate_ctrl_priv;
517 spinlock_t rate_ctrl_lock;
520 struct ieee80211_fast_tx __rcu *fast_tx;
521 struct ieee80211_fast_rx __rcu *fast_rx;
522 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
524 #ifdef CONFIG_MAC80211_MESH
525 struct mesh_sta *mesh;
528 struct work_struct drv_deliver_wk;
537 enum ieee80211_sta_state sta_state;
539 /* use the accessors defined below */
540 unsigned long _flags;
542 /* STA powersave lock and frame queues */
544 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
545 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
546 unsigned long driver_buffered_tids;
547 unsigned long txq_buffered_tids;
551 /* Updated from RX path only, no locking requirements */
552 struct ieee80211_sta_rx_stats rx_stats;
554 struct ewma_signal signal;
555 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
558 /* Plus 1 for non-QoS frames */
559 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
561 /* Updated from TX status path only, no locking requirements */
563 unsigned long filtered;
564 unsigned long retry_failed, retry_count;
565 unsigned int lost_packets;
566 unsigned long last_tdls_pkt_time;
567 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
568 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
569 unsigned long last_ack;
572 /* Updated from TX path only, no locking requirements */
574 u64 packets[IEEE80211_NUM_ACS];
575 u64 bytes[IEEE80211_NUM_ACS];
576 struct ieee80211_tx_rate last_rate;
577 u64 msdu[IEEE80211_NUM_TIDS + 1];
579 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
582 * Aggregation information, locked with lock.
584 struct sta_ampdu_mlme ampdu_mlme;
585 u8 timer_to_tid[IEEE80211_NUM_TIDS];
587 #ifdef CONFIG_MAC80211_DEBUGFS
588 struct dentry *debugfs_dir;
591 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
593 enum ieee80211_smps_mode known_smps_mode;
594 const struct ieee80211_cipher_scheme *cipher_scheme;
596 struct codel_params cparams;
600 struct cfg80211_chan_def tdls_chandef;
602 struct ieee80211_fragment_cache frags;
605 struct ieee80211_sta sta;
608 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
610 #ifdef CONFIG_MAC80211_MESH
611 return sta->mesh->plink_state;
613 return NL80211_PLINK_LISTEN;
616 static inline void set_sta_flag(struct sta_info *sta,
617 enum ieee80211_sta_info_flags flag)
619 WARN_ON(flag == WLAN_STA_AUTH ||
620 flag == WLAN_STA_ASSOC ||
621 flag == WLAN_STA_AUTHORIZED);
622 set_bit(flag, &sta->_flags);
625 static inline void clear_sta_flag(struct sta_info *sta,
626 enum ieee80211_sta_info_flags flag)
628 WARN_ON(flag == WLAN_STA_AUTH ||
629 flag == WLAN_STA_ASSOC ||
630 flag == WLAN_STA_AUTHORIZED);
631 clear_bit(flag, &sta->_flags);
634 static inline int test_sta_flag(struct sta_info *sta,
635 enum ieee80211_sta_info_flags flag)
637 return test_bit(flag, &sta->_flags);
640 static inline int test_and_clear_sta_flag(struct sta_info *sta,
641 enum ieee80211_sta_info_flags flag)
643 WARN_ON(flag == WLAN_STA_AUTH ||
644 flag == WLAN_STA_ASSOC ||
645 flag == WLAN_STA_AUTHORIZED);
646 return test_and_clear_bit(flag, &sta->_flags);
649 static inline int test_and_set_sta_flag(struct sta_info *sta,
650 enum ieee80211_sta_info_flags flag)
652 WARN_ON(flag == WLAN_STA_AUTH ||
653 flag == WLAN_STA_ASSOC ||
654 flag == WLAN_STA_AUTHORIZED);
655 return test_and_set_bit(flag, &sta->_flags);
658 int sta_info_move_state(struct sta_info *sta,
659 enum ieee80211_sta_state new_state);
661 static inline void sta_info_pre_move_state(struct sta_info *sta,
662 enum ieee80211_sta_state new_state)
666 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
668 ret = sta_info_move_state(sta, new_state);
673 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
674 struct tid_ampdu_tx *tid_tx);
676 static inline struct tid_ampdu_tx *
677 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
679 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
680 lockdep_is_held(&sta->lock) ||
681 lockdep_is_held(&sta->ampdu_mlme.mtx));
684 /* Maximum number of frames to buffer per power saving station per AC */
685 #define STA_MAX_TX_BUFFER 64
687 /* Minimum buffered frame expiry time. If STA uses listen interval that is
688 * smaller than this value, the minimum value here is used instead. */
689 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
691 /* How often station data is cleaned up (e.g., expiration of buffered frames)
693 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
695 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
699 * Get a STA info, must be under RCU read lock.
701 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
704 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
707 #define for_each_sta_info(local, _addr, _sta, _tmp) \
708 rhl_for_each_entry_rcu(_sta, _tmp, \
709 sta_info_hash_lookup(local, _addr), hash_node)
712 * Get STA info by index, BROKEN!
714 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
717 * Create a new STA info, caller owns returned structure
718 * until sta_info_insert().
720 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
721 const u8 *addr, gfp_t gfp);
723 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
726 * Insert STA info into hash table/list, returns zero or a
727 * -EEXIST if (if the same MAC address is already present).
729 * Calling the non-rcu version makes the caller relinquish,
730 * the _rcu version calls read_lock_rcu() and must be called
733 int sta_info_insert(struct sta_info *sta);
734 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
736 int __must_check __sta_info_destroy(struct sta_info *sta);
737 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
739 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
742 void sta_info_recalc_tim(struct sta_info *sta);
744 int sta_info_init(struct ieee80211_local *local);
745 void sta_info_stop(struct ieee80211_local *local);
748 * sta_info_flush - flush matching STA entries from the STA table
750 * Returns the number of removed STA entries.
752 * @sdata: sdata to remove all stations from
753 * @vlans: if the given interface is an AP interface, also flush VLANs
755 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
757 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
759 return __sta_info_flush(sdata, false);
762 void sta_set_rate_info_tx(struct sta_info *sta,
763 const struct ieee80211_tx_rate *rate,
764 struct rate_info *rinfo);
765 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo);
767 u32 sta_get_expected_throughput(struct sta_info *sta);
769 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
770 unsigned long exp_time);
771 u8 sta_info_tx_streams(struct sta_info *sta);
773 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
774 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
775 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
777 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
779 enum sta_stats_type {
780 STA_STATS_RATE_TYPE_INVALID = 0,
781 STA_STATS_RATE_TYPE_LEGACY,
782 STA_STATS_RATE_TYPE_HT,
783 STA_STATS_RATE_TYPE_VHT,
786 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
787 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
788 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
789 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
790 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
791 #define STA_STATS_FIELD_BW GENMASK(11, 8)
792 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
793 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
795 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
796 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
798 #define STA_STATS_RATE_INVALID 0
800 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
804 r = STA_STATS_FIELD(BW, s->bw);
806 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
807 r |= STA_STATS_FIELD(SGI, 1);
809 switch (s->encoding) {
811 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
812 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
813 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
816 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
817 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
820 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
821 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
822 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
826 return STA_STATS_RATE_INVALID;
832 #endif /* STA_INFO_H */