1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright 2002-2005, Devicescape Software, Inc.
4 * Copyright 2013-2014 Intel Mobile Communications GmbH
5 * Copyright(c) 2015-2017 Intel Deutschland GmbH
6 * Copyright(c) 2020-2021 Intel Corporation
12 #include <linux/list.h>
13 #include <linux/types.h>
14 #include <linux/if_ether.h>
15 #include <linux/workqueue.h>
16 #include <linux/average.h>
17 #include <linux/bitfield.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rhashtable.h>
20 #include <linux/u64_stats_sync.h>
24 * enum ieee80211_sta_info_flags - Stations flags
26 * These flags are used with &struct sta_info's @flags member, but
27 * only indirectly with set_sta_flag() and friends.
29 * @WLAN_STA_AUTH: Station is authenticated.
30 * @WLAN_STA_ASSOC: Station is associated.
31 * @WLAN_STA_PS_STA: Station is in power-save mode
32 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
33 * This bit is always checked so needs to be enabled for all stations
34 * when virtual port control is not in use.
35 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
37 * @WLAN_STA_WDS: Station is one of our WDS peers.
38 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
39 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
40 * frame to this station is transmitted.
41 * @WLAN_STA_MFP: Management frame protection is used with this STA.
42 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
43 * during suspend/resume and station removal.
44 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
45 * power-save mode logically to flush frames that might still
47 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
48 * station in power-save mode, reply when the driver unblocks.
49 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
50 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
51 * packets. This means the link is enabled.
52 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
54 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
55 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
57 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
58 * the BSS base channel.
59 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
60 * keeping station in power-save mode, reply when the driver
61 * unblocks the station.
62 * @WLAN_STA_SP: Station is in a service period, so don't try to
63 * reply to other uAPSD trigger frames or PS-Poll.
64 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
65 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
66 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
67 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
68 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
69 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
70 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
71 * until pending frames are delivered
72 * @WLAN_STA_USES_ENCRYPTION: This station was configured for encryption,
73 * so drop all packets without a key later.
74 * @WLAN_STA_DECAP_OFFLOAD: This station uses rx decap offload
76 * @NUM_WLAN_STA_FLAGS: number of defined flags
78 enum ieee80211_sta_info_flags {
83 WLAN_STA_SHORT_PREAMBLE,
85 WLAN_STA_CLEAR_PS_FILT,
91 WLAN_STA_TDLS_PEER_AUTH,
92 WLAN_STA_TDLS_INITIATOR,
93 WLAN_STA_TDLS_CHAN_SWITCH,
94 WLAN_STA_TDLS_OFF_CHANNEL,
95 WLAN_STA_TDLS_WIDER_BW,
100 WLAN_STA_RATE_CONTROL,
101 WLAN_STA_TOFFSET_KNOWN,
103 WLAN_STA_MPSP_RECIPIENT,
105 WLAN_STA_USES_ENCRYPTION,
106 WLAN_STA_DECAP_OFFLOAD,
111 #define ADDBA_RESP_INTERVAL HZ
112 #define HT_AGG_MAX_RETRIES 15
113 #define HT_AGG_BURST_RETRIES 3
114 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
116 #define HT_AGG_STATE_DRV_READY 0
117 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
118 #define HT_AGG_STATE_OPERATIONAL 2
119 #define HT_AGG_STATE_STOPPING 3
120 #define HT_AGG_STATE_WANT_START 4
121 #define HT_AGG_STATE_WANT_STOP 5
122 #define HT_AGG_STATE_START_CB 6
123 #define HT_AGG_STATE_STOP_CB 7
124 #define HT_AGG_STATE_SENT_ADDBA 8
126 DECLARE_EWMA(avg_signal, 10, 8)
127 enum ieee80211_agg_stop_reason {
129 AGG_STOP_LOCAL_REQUEST,
130 AGG_STOP_PEER_REQUEST,
131 AGG_STOP_DESTROY_STA,
134 /* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */
135 #define AIRTIME_USE_TX BIT(0)
136 #define AIRTIME_USE_RX BIT(1)
139 struct airtime_info {
144 struct list_head list;
145 atomic_t aql_tx_pending; /* Estimated airtime for frames pending */
148 u32 weight_reciprocal;
152 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
153 struct sta_info *sta, u8 ac,
154 u16 tx_airtime, bool tx_completed);
155 void ieee80211_register_airtime(struct ieee80211_txq *txq,
156 u32 tx_airtime, u32 rx_airtime);
161 * struct tid_ampdu_tx - TID aggregation information (Tx).
163 * @rcu_head: rcu head for freeing structure
164 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
165 * @addba_resp_timer: timer for peer's response to addba request
166 * @pending: pending frames queue -- use sta's spinlock to protect
167 * @sta: station we are attached to
168 * @dialog_token: dialog token for aggregation session
169 * @timeout: session timeout value to be filled in ADDBA requests
171 * @state: session state (see above)
172 * @last_tx: jiffies of last tx activity
173 * @stop_initiator: initiator of a session stop
174 * @tx_stop: TX DelBA frame when stopping
175 * @buf_size: reorder buffer size at receiver
176 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
177 * @bar_pending: BAR needs to be re-sent
178 * @amsdu: support A-MSDU withing A-MDPU
180 * This structure's lifetime is managed by RCU, assignments to
181 * the array holding it must hold the aggregation mutex.
183 * The TX path can access it under RCU lock-free if, and
184 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
185 * set. Otherwise, the TX path must also acquire the spinlock
186 * and re-check the state, see comments in the tx code
189 struct tid_ampdu_tx {
190 struct rcu_head rcu_head;
191 struct timer_list session_timer;
192 struct timer_list addba_resp_timer;
193 struct sk_buff_head pending;
194 struct sta_info *sta;
196 unsigned long last_tx;
210 * struct tid_ampdu_rx - TID aggregation information (Rx).
212 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
213 * A-MSDU with individually reported subframes.
214 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
215 * the reorder buffer that should be ignored when releasing frames
216 * @reorder_time: jiffies when skb was added
217 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
218 * @reorder_timer: releases expired frames from the reorder buffer.
219 * @sta: station we are attached to
220 * @last_rx: jiffies of last rx activity
221 * @head_seq_num: head sequence number in reordering buffer.
222 * @stored_mpdu_num: number of MPDUs in reordering buffer
223 * @ssn: Starting Sequence Number expected to be aggregated.
224 * @buf_size: buffer size for incoming A-MPDUs
225 * @timeout: reset timer value (in TUs).
227 * @rcu_head: RCU head used for freeing this struct
228 * @reorder_lock: serializes access to reorder buffer, see below.
229 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
231 * @removed: this session is removed (but might have been found due to RCU)
232 * @started: this session has started (head ssn or higher was received)
234 * This structure's lifetime is managed by RCU, assignments to
235 * the array holding it must hold the aggregation mutex.
237 * The @reorder_lock is used to protect the members of this
238 * struct, except for @timeout, @buf_size and @dialog_token,
239 * which are constant across the lifetime of the struct (the
240 * dialog token being used only for debugging).
242 struct tid_ampdu_rx {
243 struct rcu_head rcu_head;
244 spinlock_t reorder_lock;
245 u64 reorder_buf_filtered;
246 struct sk_buff_head *reorder_buf;
247 unsigned long *reorder_time;
248 struct sta_info *sta;
249 struct timer_list session_timer;
250 struct timer_list reorder_timer;
251 unsigned long last_rx;
264 * struct sta_ampdu_mlme - STA aggregation information.
266 * @mtx: mutex to protect all TX data (except non-NULL assignments
267 * to tid_tx[idx], which are protected by the sta spinlock)
268 * tid_start_tx is also protected by sta->lock.
269 * @tid_rx: aggregation info for Rx per TID -- RCU protected
270 * @tid_rx_token: dialog tokens for valid aggregation sessions
271 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
272 * RX timer expired until the work for it runs
273 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
274 * driver requested to close until the work for it runs
275 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
276 * to be treated as started/stopped due to offloading
277 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
278 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
279 * unexpected aggregation related frames outside a session
280 * @work: work struct for starting/stopping aggregation
281 * @tid_tx: aggregation info for Tx per TID
282 * @tid_start_tx: sessions where start was requested
283 * @last_addba_req_time: timestamp of the last addBA request.
284 * @addba_req_num: number of times addBA request has been sent.
285 * @dialog_token_allocator: dialog token enumerator for each new session;
287 struct sta_ampdu_mlme {
290 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
291 u8 tid_rx_token[IEEE80211_NUM_TIDS];
292 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
293 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
294 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
295 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
296 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
298 struct work_struct work;
299 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
300 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
301 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
302 u8 addba_req_num[IEEE80211_NUM_TIDS];
303 u8 dialog_token_allocator;
307 /* Value to indicate no TID reservation */
308 #define IEEE80211_TID_UNRESERVED 0xff
310 #define IEEE80211_FAST_XMIT_MAX_IV 18
313 * struct ieee80211_fast_tx - TX fastpath information
314 * @key: key to use for hw crypto
315 * @hdr: the 802.11 header to put with the frame
316 * @hdr_len: actual 802.11 header length
317 * @sa_offs: offset of the SA
318 * @da_offs: offset of the DA
319 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
320 * @band: band this will be transmitted on, for tx_info
321 * @rcu_head: RCU head to free this struct
323 * This struct is small enough so that the common case (maximum crypto
324 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
327 struct ieee80211_fast_tx {
328 struct ieee80211_key *key;
330 u8 sa_offs, da_offs, pn_offs;
332 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
333 sizeof(rfc1042_header)] __aligned(2);
335 struct rcu_head rcu_head;
339 * struct ieee80211_fast_rx - RX fastpath information
340 * @dev: netdevice for reporting the SKB
341 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
342 * @vif_addr: interface address
343 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
344 * @control_port_protocol: control port protocol copied from sdata
345 * @expected_ds_bits: from/to DS bits expected
346 * @icv_len: length of the MIC if present
347 * @key: bool indicating encryption is expected (key is set)
348 * @internal_forward: forward froms internally on AP/VLAN type interfaces
349 * @uses_rss: copy of USES_RSS hw flag
350 * @da_offs: offset of the DA in the header (for header conversion)
351 * @sa_offs: offset of the SA in the header (for header conversion)
352 * @rcu_head: RCU head for freeing this structure
354 struct ieee80211_fast_rx {
355 struct net_device *dev;
356 enum nl80211_iftype vif_type;
357 u8 vif_addr[ETH_ALEN] __aligned(2);
358 u8 rfc1042_hdr[6] __aligned(2);
359 __be16 control_port_protocol;
360 __le16 expected_ds_bits;
367 struct rcu_head rcu_head;
370 /* we use only values in the range 0-100, so pick a large precision */
371 DECLARE_EWMA(mesh_fail_avg, 20, 8)
372 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16)
375 * struct mesh_sta - mesh STA information
376 * @plink_lock: serialize access to plink fields
377 * @llid: Local link ID
378 * @plid: Peer link ID
379 * @aid: local aid supplied by peer
380 * @reason: Cancel reason on PLINK_HOLDING state
381 * @plink_retries: Retries in establishment
382 * @plink_state: peer link state
383 * @plink_timeout: timeout of peer link
384 * @plink_timer: peer link watch timer
385 * @plink_sta: peer link watch timer's sta_info
386 * @t_offset: timing offset relative to this host
387 * @t_offset_setpoint: reference timing offset of this sta to be used when
388 * calculating clockdrift
389 * @local_pm: local link-specific power save mode
390 * @peer_pm: peer-specific power save mode towards local STA
391 * @nonpeer_pm: STA power save mode towards non-peer neighbors
392 * @processed_beacon: set to true after peer rates and capabilities are
394 * @connected_to_gate: true if mesh STA has a path to a mesh gate
395 * @connected_to_as: true if mesh STA has a path to a authentication server
396 * @fail_avg: moving percentage of failed MSDUs
397 * @tx_rate_avg: moving average of tx bitrate
400 struct timer_list plink_timer;
401 struct sta_info *plink_sta;
404 s64 t_offset_setpoint;
406 spinlock_t plink_lock;
413 bool processed_beacon;
414 bool connected_to_gate;
415 bool connected_to_as;
417 enum nl80211_plink_state plink_state;
420 /* mesh power save */
421 enum nl80211_mesh_power_mode local_pm;
422 enum nl80211_mesh_power_mode peer_pm;
423 enum nl80211_mesh_power_mode nonpeer_pm;
425 /* moving percentage of failed MSDUs */
426 struct ewma_mesh_fail_avg fail_avg;
427 /* moving average of tx bitrate */
428 struct ewma_mesh_tx_rate_avg tx_rate_avg;
431 DECLARE_EWMA(signal, 10, 8)
433 struct ieee80211_sta_rx_stats {
434 unsigned long packets;
435 unsigned long last_rx;
436 unsigned long num_duplicates;
437 unsigned long fragments;
438 unsigned long dropped;
441 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
443 struct u64_stats_sync syncp;
445 u64 msdu[IEEE80211_NUM_TIDS + 1];
449 * IEEE 802.11-2016 (10.6 "Defragmentation") recommends support for "concurrent
450 * reception of at least one MSDU per access category per associated STA"
451 * on APs, or "at least one MSDU per access category" on other interface types.
453 * This limit can be increased by changing this define, at the cost of slower
454 * frame reassembly and increased memory use while fragments are pending.
456 #define IEEE80211_FRAGMENT_MAX 4
458 struct ieee80211_fragment_entry {
459 struct sk_buff_head skb_list;
460 unsigned long first_frag_time;
465 u8 check_sequential_pn:1, /* needed for CCMP/GCMP */
467 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
468 unsigned int key_color;
471 struct ieee80211_fragment_cache {
472 struct ieee80211_fragment_entry entries[IEEE80211_FRAGMENT_MAX];
477 * The bandwidth threshold below which the per-station CoDel parameters will be
478 * scaled to be more lenient (to prevent starvation of slow stations). This
479 * value will be scaled by the number of active stations when it is being
482 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
485 * struct sta_info - STA information
487 * This structure collects information about a station that
488 * mac80211 is communicating with.
490 * @list: global linked list entry
491 * @free_list: list entry for keeping track of stations to free
492 * @hash_node: hash node for rhashtable
493 * @addr: station's MAC address - duplicated from public part to
494 * let the hash table work with just a single cacheline
495 * @local: pointer to the global information
496 * @sdata: virtual interface this station belongs to
497 * @ptk: peer keys negotiated with this station, if any
498 * @ptk_idx: last installed peer key index
499 * @gtk: group keys negotiated with this station, if any
500 * @rate_ctrl: rate control algorithm reference
501 * @rate_ctrl_lock: spinlock used to protect rate control data
502 * (data inside the algorithm, so serializes calls there)
503 * @rate_ctrl_priv: rate control private per-STA pointer
504 * @lock: used for locking all fields that require locking, see comments
505 * in the header file.
506 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
507 * @listen_interval: listen interval of this station, when we're acting as AP
508 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
509 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
510 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
511 * when it leaves power saving state or polls
512 * @tx_filtered: buffers (per AC) of frames we already tried to
513 * transmit but were filtered by hardware due to STA having
514 * entered power saving state, these are also delivered to
515 * the station when it leaves powersave or polls for frames
516 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
517 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
518 * @assoc_at: clock boottime (in ns) of last association
519 * @last_connected: time (in seconds) when a station got connected
520 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
521 * plus one for non-QoS frames)
522 * @tid_seq: per-TID sequence numbers for sending to this STA
523 * @airtime: per-AC struct airtime_info describing airtime statistics for this
525 * @ampdu_mlme: A-MPDU state machine state
526 * @mesh: mesh STA information
527 * @debugfs_dir: debug filesystem directory dentry
528 * @dead: set to true when sta is unlinked
529 * @removed: set to true when sta is being removed from sta_list
530 * @uploaded: set to true when sta is uploaded to the driver
531 * @sta: station information we share with the driver
532 * @sta_state: duplicates information about station state (for debug)
533 * @rcu_head: RCU head used for freeing this station struct
534 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
535 * taken from HT/VHT capabilities or VHT operating mode notification
536 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
538 * @cipher_scheme: optional cipher scheme for this station
539 * @cparams: CoDel parameters for this station.
540 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
541 * @fast_tx: TX fastpath information
542 * @fast_rx: RX fastpath information
543 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
545 * @tx_stats: TX statistics
546 * @tx_stats.packets: # of packets transmitted
547 * @tx_stats.bytes: # of bytes in all packets transmitted
548 * @tx_stats.last_rate: last TX rate
549 * @tx_stats.msdu: # of transmitted MSDUs per TID
550 * @rx_stats: RX statistics
551 * @rx_stats_avg: averaged RX statistics
552 * @rx_stats_avg.signal: averaged signal
553 * @rx_stats_avg.chain_signal: averaged per-chain signal
554 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
555 * this (by advertising the USES_RSS hw flag)
556 * @status_stats: TX status statistics
557 * @status_stats.filtered: # of filtered frames
558 * @status_stats.retry_failed: # of frames that failed after retry
559 * @status_stats.retry_count: # of retries attempted
560 * @status_stats.lost_packets: # of lost packets
561 * @status_stats.last_pkt_time: timestamp of last ACKed packet
562 * @status_stats.msdu_retries: # of MSDU retries
563 * @status_stats.msdu_failed: # of failed MSDUs
564 * @status_stats.last_ack: last ack timestamp (jiffies)
565 * @status_stats.last_ack_signal: last ACK signal
566 * @status_stats.ack_signal_filled: last ACK signal validity
567 * @status_stats.avg_ack_signal: average ACK signal
568 * @frags: fragment cache
571 /* General information, mostly static */
572 struct list_head list, free_list;
573 struct rcu_head rcu_head;
574 struct rhlist_head hash_node;
576 struct ieee80211_local *local;
577 struct ieee80211_sub_if_data *sdata;
578 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS +
579 NUM_DEFAULT_MGMT_KEYS +
580 NUM_DEFAULT_BEACON_KEYS];
581 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
583 struct rate_control_ref *rate_ctrl;
584 void *rate_ctrl_priv;
585 spinlock_t rate_ctrl_lock;
588 struct ieee80211_fast_tx __rcu *fast_tx;
589 struct ieee80211_fast_rx __rcu *fast_rx;
590 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
592 #ifdef CONFIG_MAC80211_MESH
593 struct mesh_sta *mesh;
596 struct work_struct drv_deliver_wk;
605 enum ieee80211_sta_state sta_state;
607 /* use the accessors defined below */
608 unsigned long _flags;
610 /* STA powersave lock and frame queues */
612 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
613 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
614 unsigned long driver_buffered_tids;
615 unsigned long txq_buffered_tids;
620 /* Updated from RX path only, no locking requirements */
621 struct ieee80211_sta_rx_stats rx_stats;
623 struct ewma_signal signal;
624 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
627 /* Plus 1 for non-QoS frames */
628 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
630 /* Updated from TX status path only, no locking requirements */
632 unsigned long filtered;
633 unsigned long retry_failed, retry_count;
634 unsigned int lost_packets;
635 unsigned long last_pkt_time;
636 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
637 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
638 unsigned long last_ack;
640 bool ack_signal_filled;
641 struct ewma_avg_signal avg_ack_signal;
644 /* Updated from TX path only, no locking requirements */
646 u64 packets[IEEE80211_NUM_ACS];
647 u64 bytes[IEEE80211_NUM_ACS];
648 struct ieee80211_tx_rate last_rate;
649 struct rate_info last_rate_info;
650 u64 msdu[IEEE80211_NUM_TIDS + 1];
652 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
654 struct airtime_info airtime[IEEE80211_NUM_ACS];
657 * Aggregation information, locked with lock.
659 struct sta_ampdu_mlme ampdu_mlme;
661 #ifdef CONFIG_MAC80211_DEBUGFS
662 struct dentry *debugfs_dir;
665 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
667 enum ieee80211_smps_mode known_smps_mode;
668 const struct ieee80211_cipher_scheme *cipher_scheme;
670 struct codel_params cparams;
674 struct cfg80211_chan_def tdls_chandef;
676 struct ieee80211_fragment_cache frags;
679 struct ieee80211_sta sta;
682 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
684 #ifdef CONFIG_MAC80211_MESH
685 return sta->mesh->plink_state;
687 return NL80211_PLINK_LISTEN;
690 static inline void set_sta_flag(struct sta_info *sta,
691 enum ieee80211_sta_info_flags flag)
693 WARN_ON(flag == WLAN_STA_AUTH ||
694 flag == WLAN_STA_ASSOC ||
695 flag == WLAN_STA_AUTHORIZED);
696 set_bit(flag, &sta->_flags);
699 static inline void clear_sta_flag(struct sta_info *sta,
700 enum ieee80211_sta_info_flags flag)
702 WARN_ON(flag == WLAN_STA_AUTH ||
703 flag == WLAN_STA_ASSOC ||
704 flag == WLAN_STA_AUTHORIZED);
705 clear_bit(flag, &sta->_flags);
708 static inline int test_sta_flag(struct sta_info *sta,
709 enum ieee80211_sta_info_flags flag)
711 return test_bit(flag, &sta->_flags);
714 static inline int test_and_clear_sta_flag(struct sta_info *sta,
715 enum ieee80211_sta_info_flags flag)
717 WARN_ON(flag == WLAN_STA_AUTH ||
718 flag == WLAN_STA_ASSOC ||
719 flag == WLAN_STA_AUTHORIZED);
720 return test_and_clear_bit(flag, &sta->_flags);
723 static inline int test_and_set_sta_flag(struct sta_info *sta,
724 enum ieee80211_sta_info_flags flag)
726 WARN_ON(flag == WLAN_STA_AUTH ||
727 flag == WLAN_STA_ASSOC ||
728 flag == WLAN_STA_AUTHORIZED);
729 return test_and_set_bit(flag, &sta->_flags);
732 int sta_info_move_state(struct sta_info *sta,
733 enum ieee80211_sta_state new_state);
735 static inline void sta_info_pre_move_state(struct sta_info *sta,
736 enum ieee80211_sta_state new_state)
740 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
742 ret = sta_info_move_state(sta, new_state);
747 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
748 struct tid_ampdu_tx *tid_tx);
750 static inline struct tid_ampdu_tx *
751 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
753 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
754 lockdep_is_held(&sta->lock) ||
755 lockdep_is_held(&sta->ampdu_mlme.mtx));
758 /* Maximum number of frames to buffer per power saving station per AC */
759 #define STA_MAX_TX_BUFFER 64
761 /* Minimum buffered frame expiry time. If STA uses listen interval that is
762 * smaller than this value, the minimum value here is used instead. */
763 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
765 /* How often station data is cleaned up (e.g., expiration of buffered frames)
767 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
769 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
773 * Get a STA info, must be under RCU read lock.
775 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
778 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
781 /* user must hold sta_mtx or be in RCU critical section */
782 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
783 const u8 *sta_addr, const u8 *vif_addr);
785 #define for_each_sta_info(local, _addr, _sta, _tmp) \
786 rhl_for_each_entry_rcu(_sta, _tmp, \
787 sta_info_hash_lookup(local, _addr), hash_node)
790 * Get STA info by index, BROKEN!
792 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
795 * Create a new STA info, caller owns returned structure
796 * until sta_info_insert().
798 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
799 const u8 *addr, gfp_t gfp);
801 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
804 * Insert STA info into hash table/list, returns zero or a
805 * -EEXIST if (if the same MAC address is already present).
807 * Calling the non-rcu version makes the caller relinquish,
808 * the _rcu version calls read_lock_rcu() and must be called
811 int sta_info_insert(struct sta_info *sta);
812 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
814 int __must_check __sta_info_destroy(struct sta_info *sta);
815 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
817 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
820 void sta_info_recalc_tim(struct sta_info *sta);
822 int sta_info_init(struct ieee80211_local *local);
823 void sta_info_stop(struct ieee80211_local *local);
826 * __sta_info_flush - flush matching STA entries from the STA table
828 * Returns the number of removed STA entries.
830 * @sdata: sdata to remove all stations from
831 * @vlans: if the given interface is an AP interface, also flush VLANs
833 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
836 * sta_info_flush - flush matching STA entries from the STA table
838 * Returns the number of removed STA entries.
840 * @sdata: sdata to remove all stations from
842 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
844 return __sta_info_flush(sdata, false);
847 void sta_set_rate_info_tx(struct sta_info *sta,
848 const struct ieee80211_tx_rate *rate,
849 struct rate_info *rinfo);
850 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
853 u32 sta_get_expected_throughput(struct sta_info *sta);
855 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
856 unsigned long exp_time);
857 u8 sta_info_tx_streams(struct sta_info *sta);
859 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
860 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
861 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
863 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
865 enum sta_stats_type {
866 STA_STATS_RATE_TYPE_INVALID = 0,
867 STA_STATS_RATE_TYPE_LEGACY,
868 STA_STATS_RATE_TYPE_HT,
869 STA_STATS_RATE_TYPE_VHT,
870 STA_STATS_RATE_TYPE_HE,
871 STA_STATS_RATE_TYPE_S1G,
874 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
875 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
876 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
877 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
878 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
879 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
880 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
881 #define STA_STATS_FIELD_BW GENMASK(11, 8)
882 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
883 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
884 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16)
885 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19)
886 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21)
888 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
889 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
891 #define STA_STATS_RATE_INVALID 0
893 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
897 r = STA_STATS_FIELD(BW, s->bw);
899 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
900 r |= STA_STATS_FIELD(SGI, 1);
902 switch (s->encoding) {
904 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
905 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
906 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
909 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
910 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
913 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
914 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
915 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
918 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
919 r |= STA_STATS_FIELD(HE_NSS, s->nss);
920 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
921 r |= STA_STATS_FIELD(HE_GI, s->he_gi);
922 r |= STA_STATS_FIELD(HE_RU, s->he_ru);
923 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
927 return STA_STATS_RATE_INVALID;
933 #endif /* STA_INFO_H */