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,
133 * struct tid_ampdu_tx - TID aggregation information (Tx).
135 * @rcu_head: rcu head for freeing structure
136 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
137 * @addba_resp_timer: timer for peer's response to addba request
138 * @pending: pending frames queue -- use sta's spinlock to protect
139 * @sta: station we are attached to
140 * @dialog_token: dialog token for aggregation session
141 * @timeout: session timeout value to be filled in ADDBA requests
143 * @state: session state (see above)
144 * @last_tx: jiffies of last tx activity
145 * @stop_initiator: initiator of a session stop
146 * @tx_stop: TX DelBA frame when stopping
147 * @buf_size: reorder buffer size at receiver
148 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
149 * @bar_pending: BAR needs to be re-sent
150 * @amsdu: support A-MSDU withing A-MDPU
152 * This structure's lifetime is managed by RCU, assignments to
153 * the array holding it must hold the aggregation mutex.
155 * The TX path can access it under RCU lock-free if, and
156 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
157 * set. Otherwise, the TX path must also acquire the spinlock
158 * and re-check the state, see comments in the tx code
161 struct tid_ampdu_tx {
162 struct rcu_head rcu_head;
163 struct timer_list session_timer;
164 struct timer_list addba_resp_timer;
165 struct sk_buff_head pending;
166 struct sta_info *sta;
168 unsigned long last_tx;
182 * struct tid_ampdu_rx - TID aggregation information (Rx).
184 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
185 * A-MSDU with individually reported subframes.
186 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
187 * the reorder buffer that should be ignored when releasing frames
188 * @reorder_time: jiffies when skb was added
189 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
190 * @reorder_timer: releases expired frames from the reorder buffer.
191 * @sta: station we are attached to
192 * @last_rx: jiffies of last rx activity
193 * @head_seq_num: head sequence number in reordering buffer.
194 * @stored_mpdu_num: number of MPDUs in reordering buffer
195 * @ssn: Starting Sequence Number expected to be aggregated.
196 * @buf_size: buffer size for incoming A-MPDUs
197 * @timeout: reset timer value (in TUs).
199 * @rcu_head: RCU head used for freeing this struct
200 * @reorder_lock: serializes access to reorder buffer, see below.
201 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
203 * @removed: this session is removed (but might have been found due to RCU)
204 * @started: this session has started (head ssn or higher was received)
206 * This structure's lifetime is managed by RCU, assignments to
207 * the array holding it must hold the aggregation mutex.
209 * The @reorder_lock is used to protect the members of this
210 * struct, except for @timeout, @buf_size and @dialog_token,
211 * which are constant across the lifetime of the struct (the
212 * dialog token being used only for debugging).
214 struct tid_ampdu_rx {
215 struct rcu_head rcu_head;
216 spinlock_t reorder_lock;
217 u64 reorder_buf_filtered;
218 struct sk_buff_head *reorder_buf;
219 unsigned long *reorder_time;
220 struct sta_info *sta;
221 struct timer_list session_timer;
222 struct timer_list reorder_timer;
223 unsigned long last_rx;
236 * struct sta_ampdu_mlme - STA aggregation information.
238 * @mtx: mutex to protect all TX data (except non-NULL assignments
239 * to tid_tx[idx], which are protected by the sta spinlock)
240 * tid_start_tx is also protected by sta->lock.
241 * @tid_rx: aggregation info for Rx per TID -- RCU protected
242 * @tid_rx_token: dialog tokens for valid aggregation sessions
243 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
244 * RX timer expired until the work for it runs
245 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
246 * driver requested to close until the work for it runs
247 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
248 * to be treated as started/stopped due to offloading
249 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
250 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
251 * unexpected aggregation related frames outside a session
252 * @work: work struct for starting/stopping aggregation
253 * @tid_tx: aggregation info for Tx per TID
254 * @tid_start_tx: sessions where start was requested
255 * @last_addba_req_time: timestamp of the last addBA request.
256 * @addba_req_num: number of times addBA request has been sent.
257 * @dialog_token_allocator: dialog token enumerator for each new session;
259 struct sta_ampdu_mlme {
262 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
263 u8 tid_rx_token[IEEE80211_NUM_TIDS];
264 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
265 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
266 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
267 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
268 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
270 struct work_struct work;
271 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
272 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
273 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
274 u8 addba_req_num[IEEE80211_NUM_TIDS];
275 u8 dialog_token_allocator;
279 /* Value to indicate no TID reservation */
280 #define IEEE80211_TID_UNRESERVED 0xff
282 #define IEEE80211_FAST_XMIT_MAX_IV 18
285 * struct ieee80211_fast_tx - TX fastpath information
286 * @key: key to use for hw crypto
287 * @hdr: the 802.11 header to put with the frame
288 * @hdr_len: actual 802.11 header length
289 * @sa_offs: offset of the SA
290 * @da_offs: offset of the DA
291 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
292 * @band: band this will be transmitted on, for tx_info
293 * @rcu_head: RCU head to free this struct
295 * This struct is small enough so that the common case (maximum crypto
296 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
299 struct ieee80211_fast_tx {
300 struct ieee80211_key *key;
302 u8 sa_offs, da_offs, pn_offs;
304 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
305 sizeof(rfc1042_header)] __aligned(2);
307 struct rcu_head rcu_head;
311 * struct ieee80211_fast_rx - RX fastpath information
312 * @dev: netdevice for reporting the SKB
313 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
314 * @vif_addr: interface address
315 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
316 * @control_port_protocol: control port protocol copied from sdata
317 * @expected_ds_bits: from/to DS bits expected
318 * @icv_len: length of the MIC if present
319 * @key: bool indicating encryption is expected (key is set)
320 * @sta_notify: notify the MLME code (once)
321 * @internal_forward: forward froms internally on AP/VLAN type interfaces
322 * @uses_rss: copy of USES_RSS hw flag
323 * @da_offs: offset of the DA in the header (for header conversion)
324 * @sa_offs: offset of the SA in the header (for header conversion)
325 * @rcu_head: RCU head for freeing this structure
327 struct ieee80211_fast_rx {
328 struct net_device *dev;
329 enum nl80211_iftype vif_type;
330 u8 vif_addr[ETH_ALEN] __aligned(2);
331 u8 rfc1042_hdr[6] __aligned(2);
332 __be16 control_port_protocol;
333 __le16 expected_ds_bits;
341 struct rcu_head rcu_head;
344 /* we use only values in the range 0-100, so pick a large precision */
345 DECLARE_EWMA(mesh_fail_avg, 20, 8)
348 * struct mesh_sta - mesh STA information
349 * @plink_lock: serialize access to plink fields
350 * @llid: Local link ID
351 * @plid: Peer link ID
352 * @aid: local aid supplied by peer
353 * @reason: Cancel reason on PLINK_HOLDING state
354 * @plink_retries: Retries in establishment
355 * @plink_state: peer link state
356 * @plink_timeout: timeout of peer link
357 * @plink_timer: peer link watch timer
358 * @plink_sta: peer link watch timer's sta_info
359 * @t_offset: timing offset relative to this host
360 * @t_offset_setpoint: reference timing offset of this sta to be used when
361 * calculating clockdrift
362 * @local_pm: local link-specific power save mode
363 * @peer_pm: peer-specific power save mode towards local STA
364 * @nonpeer_pm: STA power save mode towards non-peer neighbors
365 * @processed_beacon: set to true after peer rates and capabilities are
367 * @connected_to_gate: true if mesh STA has a path to a mesh gate
368 * @fail_avg: moving percentage of failed MSDUs
371 struct timer_list plink_timer;
372 struct sta_info *plink_sta;
375 s64 t_offset_setpoint;
377 spinlock_t plink_lock;
384 bool processed_beacon;
385 bool connected_to_gate;
387 enum nl80211_plink_state plink_state;
390 /* mesh power save */
391 enum nl80211_mesh_power_mode local_pm;
392 enum nl80211_mesh_power_mode peer_pm;
393 enum nl80211_mesh_power_mode nonpeer_pm;
395 /* moving percentage of failed MSDUs */
396 struct ewma_mesh_fail_avg fail_avg;
399 DECLARE_EWMA(signal, 10, 8)
401 struct ieee80211_sta_rx_stats {
402 unsigned long packets;
403 unsigned long last_rx;
404 unsigned long num_duplicates;
405 unsigned long fragments;
406 unsigned long dropped;
409 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
411 struct u64_stats_sync syncp;
413 u64 msdu[IEEE80211_NUM_TIDS + 1];
417 * The bandwidth threshold below which the per-station CoDel parameters will be
418 * scaled to be more lenient (to prevent starvation of slow stations). This
419 * value will be scaled by the number of active stations when it is being
422 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
425 * struct sta_info - STA information
427 * This structure collects information about a station that
428 * mac80211 is communicating with.
430 * @list: global linked list entry
431 * @free_list: list entry for keeping track of stations to free
432 * @hash_node: hash node for rhashtable
433 * @addr: station's MAC address - duplicated from public part to
434 * let the hash table work with just a single cacheline
435 * @local: pointer to the global information
436 * @sdata: virtual interface this station belongs to
437 * @ptk: peer keys negotiated with this station, if any
438 * @ptk_idx: last installed peer key index
439 * @gtk: group keys negotiated with this station, if any
440 * @rate_ctrl: rate control algorithm reference
441 * @rate_ctrl_lock: spinlock used to protect rate control data
442 * (data inside the algorithm, so serializes calls there)
443 * @rate_ctrl_priv: rate control private per-STA pointer
444 * @lock: used for locking all fields that require locking, see comments
445 * in the header file.
446 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
447 * @listen_interval: listen interval of this station, when we're acting as AP
448 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
449 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
450 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
451 * when it leaves power saving state or polls
452 * @tx_filtered: buffers (per AC) of frames we already tried to
453 * transmit but were filtered by hardware due to STA having
454 * entered power saving state, these are also delivered to
455 * the station when it leaves powersave or polls for frames
456 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
457 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
458 * @last_connected: time (in seconds) when a station got connected
459 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
460 * plus one for non-QoS frames)
461 * @tid_seq: per-TID sequence numbers for sending to this STA
462 * @ampdu_mlme: A-MPDU state machine state
463 * @mesh: mesh STA information
464 * @debugfs_dir: debug filesystem directory dentry
465 * @dead: set to true when sta is unlinked
466 * @removed: set to true when sta is being removed from sta_list
467 * @uploaded: set to true when sta is uploaded to the driver
468 * @sta: station information we share with the driver
469 * @sta_state: duplicates information about station state (for debug)
470 * @rcu_head: RCU head used for freeing this station struct
471 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
472 * taken from HT/VHT capabilities or VHT operating mode notification
473 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
475 * @cipher_scheme: optional cipher scheme for this station
476 * @cparams: CoDel parameters for this station.
477 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
478 * @fast_tx: TX fastpath information
479 * @fast_rx: RX fastpath information
480 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
482 * @tx_stats: TX statistics
483 * @rx_stats: RX statistics
484 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
485 * this (by advertising the USES_RSS hw flag)
486 * @status_stats: TX status statistics
489 /* General information, mostly static */
490 struct list_head list, free_list;
491 struct rcu_head rcu_head;
492 struct rhlist_head hash_node;
494 struct ieee80211_local *local;
495 struct ieee80211_sub_if_data *sdata;
496 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
497 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
499 struct rate_control_ref *rate_ctrl;
500 void *rate_ctrl_priv;
501 spinlock_t rate_ctrl_lock;
504 struct ieee80211_fast_tx __rcu *fast_tx;
505 struct ieee80211_fast_rx __rcu *fast_rx;
506 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
508 #ifdef CONFIG_MAC80211_MESH
509 struct mesh_sta *mesh;
512 struct work_struct drv_deliver_wk;
521 enum ieee80211_sta_state sta_state;
523 /* use the accessors defined below */
524 unsigned long _flags;
526 /* STA powersave lock and frame queues */
528 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
529 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
530 unsigned long driver_buffered_tids;
531 unsigned long txq_buffered_tids;
535 /* Updated from RX path only, no locking requirements */
536 struct ieee80211_sta_rx_stats rx_stats;
538 struct ewma_signal signal;
539 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
542 /* Plus 1 for non-QoS frames */
543 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
545 /* Updated from TX status path only, no locking requirements */
547 unsigned long filtered;
548 unsigned long retry_failed, retry_count;
549 unsigned int lost_packets;
550 unsigned long last_tdls_pkt_time;
551 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
552 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
553 unsigned long last_ack;
555 bool ack_signal_filled;
556 struct ewma_avg_signal avg_ack_signal;
559 /* Updated from TX path only, no locking requirements */
561 u64 packets[IEEE80211_NUM_ACS];
562 u64 bytes[IEEE80211_NUM_ACS];
563 struct ieee80211_tx_rate last_rate;
564 u64 msdu[IEEE80211_NUM_TIDS + 1];
566 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
569 * Aggregation information, locked with lock.
571 struct sta_ampdu_mlme ampdu_mlme;
573 #ifdef CONFIG_MAC80211_DEBUGFS
574 struct dentry *debugfs_dir;
577 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
579 enum ieee80211_smps_mode known_smps_mode;
580 const struct ieee80211_cipher_scheme *cipher_scheme;
582 struct codel_params cparams;
586 struct cfg80211_chan_def tdls_chandef;
589 struct ieee80211_sta sta;
592 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
594 #ifdef CONFIG_MAC80211_MESH
595 return sta->mesh->plink_state;
597 return NL80211_PLINK_LISTEN;
600 static inline void set_sta_flag(struct sta_info *sta,
601 enum ieee80211_sta_info_flags flag)
603 WARN_ON(flag == WLAN_STA_AUTH ||
604 flag == WLAN_STA_ASSOC ||
605 flag == WLAN_STA_AUTHORIZED);
606 set_bit(flag, &sta->_flags);
609 static inline void clear_sta_flag(struct sta_info *sta,
610 enum ieee80211_sta_info_flags flag)
612 WARN_ON(flag == WLAN_STA_AUTH ||
613 flag == WLAN_STA_ASSOC ||
614 flag == WLAN_STA_AUTHORIZED);
615 clear_bit(flag, &sta->_flags);
618 static inline int test_sta_flag(struct sta_info *sta,
619 enum ieee80211_sta_info_flags flag)
621 return test_bit(flag, &sta->_flags);
624 static inline int test_and_clear_sta_flag(struct sta_info *sta,
625 enum ieee80211_sta_info_flags flag)
627 WARN_ON(flag == WLAN_STA_AUTH ||
628 flag == WLAN_STA_ASSOC ||
629 flag == WLAN_STA_AUTHORIZED);
630 return test_and_clear_bit(flag, &sta->_flags);
633 static inline int test_and_set_sta_flag(struct sta_info *sta,
634 enum ieee80211_sta_info_flags flag)
636 WARN_ON(flag == WLAN_STA_AUTH ||
637 flag == WLAN_STA_ASSOC ||
638 flag == WLAN_STA_AUTHORIZED);
639 return test_and_set_bit(flag, &sta->_flags);
642 int sta_info_move_state(struct sta_info *sta,
643 enum ieee80211_sta_state new_state);
645 static inline void sta_info_pre_move_state(struct sta_info *sta,
646 enum ieee80211_sta_state new_state)
650 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
652 ret = sta_info_move_state(sta, new_state);
657 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
658 struct tid_ampdu_tx *tid_tx);
660 static inline struct tid_ampdu_tx *
661 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
663 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
664 lockdep_is_held(&sta->lock) ||
665 lockdep_is_held(&sta->ampdu_mlme.mtx));
668 /* Maximum number of frames to buffer per power saving station per AC */
669 #define STA_MAX_TX_BUFFER 64
671 /* Minimum buffered frame expiry time. If STA uses listen interval that is
672 * smaller than this value, the minimum value here is used instead. */
673 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
675 /* How often station data is cleaned up (e.g., expiration of buffered frames)
677 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
679 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
683 * Get a STA info, must be under RCU read lock.
685 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
688 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
691 #define for_each_sta_info(local, _addr, _sta, _tmp) \
692 rhl_for_each_entry_rcu(_sta, _tmp, \
693 sta_info_hash_lookup(local, _addr), hash_node)
696 * Get STA info by index, BROKEN!
698 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
701 * Create a new STA info, caller owns returned structure
702 * until sta_info_insert().
704 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
705 const u8 *addr, gfp_t gfp);
707 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
710 * Insert STA info into hash table/list, returns zero or a
711 * -EEXIST if (if the same MAC address is already present).
713 * Calling the non-rcu version makes the caller relinquish,
714 * the _rcu version calls read_lock_rcu() and must be called
717 int sta_info_insert(struct sta_info *sta);
718 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
720 int __must_check __sta_info_destroy(struct sta_info *sta);
721 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
723 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
726 void sta_info_recalc_tim(struct sta_info *sta);
728 int sta_info_init(struct ieee80211_local *local);
729 void sta_info_stop(struct ieee80211_local *local);
732 * sta_info_flush - flush matching STA entries from the STA table
734 * Returns the number of removed STA entries.
736 * @sdata: sdata to remove all stations from
737 * @vlans: if the given interface is an AP interface, also flush VLANs
739 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
741 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
743 return __sta_info_flush(sdata, false);
746 void sta_set_rate_info_tx(struct sta_info *sta,
747 const struct ieee80211_tx_rate *rate,
748 struct rate_info *rinfo);
749 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
752 u32 sta_get_expected_throughput(struct sta_info *sta);
754 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
755 unsigned long exp_time);
756 u8 sta_info_tx_streams(struct sta_info *sta);
758 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
759 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
760 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
762 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
764 enum sta_stats_type {
765 STA_STATS_RATE_TYPE_INVALID = 0,
766 STA_STATS_RATE_TYPE_LEGACY,
767 STA_STATS_RATE_TYPE_HT,
768 STA_STATS_RATE_TYPE_VHT,
769 STA_STATS_RATE_TYPE_HE,
772 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
773 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
774 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
775 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
776 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
777 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
778 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
779 #define STA_STATS_FIELD_BW GENMASK(11, 8)
780 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
781 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
782 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16)
783 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19)
784 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21)
786 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
787 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
789 #define STA_STATS_RATE_INVALID 0
791 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
795 r = STA_STATS_FIELD(BW, s->bw);
797 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
798 r |= STA_STATS_FIELD(SGI, 1);
800 switch (s->encoding) {
802 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
803 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
804 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
807 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
808 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
811 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
812 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
813 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
816 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
817 r |= STA_STATS_FIELD(HE_NSS, s->nss);
818 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
819 r |= STA_STATS_FIELD(HE_GI, s->he_gi);
820 r |= STA_STATS_FIELD(HE_RU, s->he_ru);
821 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
825 return STA_STATS_RATE_INVALID;
831 #endif /* STA_INFO_H */