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;
211 * struct tid_ampdu_rx - TID aggregation information (Rx).
213 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
214 * A-MSDU with individually reported subframes.
215 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
216 * the reorder buffer that should be ignored when releasing frames
217 * @reorder_time: jiffies when skb was added
218 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
219 * @reorder_timer: releases expired frames from the reorder buffer.
220 * @sta: station we are attached to
221 * @last_rx: jiffies of last rx activity
222 * @head_seq_num: head sequence number in reordering buffer.
223 * @stored_mpdu_num: number of MPDUs in reordering buffer
224 * @ssn: Starting Sequence Number expected to be aggregated.
225 * @buf_size: buffer size for incoming A-MPDUs
226 * @timeout: reset timer value (in TUs).
228 * @rcu_head: RCU head used for freeing this struct
229 * @reorder_lock: serializes access to reorder buffer, see below.
230 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
232 * @removed: this session is removed (but might have been found due to RCU)
233 * @started: this session has started (head ssn or higher was received)
235 * This structure's lifetime is managed by RCU, assignments to
236 * the array holding it must hold the aggregation mutex.
238 * The @reorder_lock is used to protect the members of this
239 * struct, except for @timeout, @buf_size and @dialog_token,
240 * which are constant across the lifetime of the struct (the
241 * dialog token being used only for debugging).
243 struct tid_ampdu_rx {
244 struct rcu_head rcu_head;
245 spinlock_t reorder_lock;
246 u64 reorder_buf_filtered;
247 struct sk_buff_head *reorder_buf;
248 unsigned long *reorder_time;
249 struct sta_info *sta;
250 struct timer_list session_timer;
251 struct timer_list reorder_timer;
252 unsigned long last_rx;
265 * struct sta_ampdu_mlme - STA aggregation information.
267 * @mtx: mutex to protect all TX data (except non-NULL assignments
268 * to tid_tx[idx], which are protected by the sta spinlock)
269 * tid_start_tx is also protected by sta->lock.
270 * @tid_rx: aggregation info for Rx per TID -- RCU protected
271 * @tid_rx_token: dialog tokens for valid aggregation sessions
272 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
273 * RX timer expired until the work for it runs
274 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
275 * driver requested to close until the work for it runs
276 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
277 * to be treated as started/stopped due to offloading
278 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
279 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
280 * unexpected aggregation related frames outside a session
281 * @work: work struct for starting/stopping aggregation
282 * @tid_tx: aggregation info for Tx per TID
283 * @tid_start_tx: sessions where start was requested
284 * @last_addba_req_time: timestamp of the last addBA request.
285 * @addba_req_num: number of times addBA request has been sent.
286 * @dialog_token_allocator: dialog token enumerator for each new session;
288 struct sta_ampdu_mlme {
291 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
292 u8 tid_rx_token[IEEE80211_NUM_TIDS];
293 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
294 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
295 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
296 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
297 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
299 struct work_struct work;
300 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
301 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
302 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
303 u8 addba_req_num[IEEE80211_NUM_TIDS];
304 u8 dialog_token_allocator;
308 /* Value to indicate no TID reservation */
309 #define IEEE80211_TID_UNRESERVED 0xff
311 #define IEEE80211_FAST_XMIT_MAX_IV 18
314 * struct ieee80211_fast_tx - TX fastpath information
315 * @key: key to use for hw crypto
316 * @hdr: the 802.11 header to put with the frame
317 * @hdr_len: actual 802.11 header length
318 * @sa_offs: offset of the SA
319 * @da_offs: offset of the DA
320 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
321 * @band: band this will be transmitted on, for tx_info
322 * @rcu_head: RCU head to free this struct
324 * This struct is small enough so that the common case (maximum crypto
325 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
328 struct ieee80211_fast_tx {
329 struct ieee80211_key *key;
331 u8 sa_offs, da_offs, pn_offs;
333 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
334 sizeof(rfc1042_header)] __aligned(2);
336 struct rcu_head rcu_head;
340 * struct ieee80211_fast_rx - RX fastpath information
341 * @dev: netdevice for reporting the SKB
342 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
343 * @vif_addr: interface address
344 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
345 * @control_port_protocol: control port protocol copied from sdata
346 * @expected_ds_bits: from/to DS bits expected
347 * @icv_len: length of the MIC if present
348 * @key: bool indicating encryption is expected (key is set)
349 * @internal_forward: forward froms internally on AP/VLAN type interfaces
350 * @uses_rss: copy of USES_RSS hw flag
351 * @da_offs: offset of the DA in the header (for header conversion)
352 * @sa_offs: offset of the SA in the header (for header conversion)
353 * @rcu_head: RCU head for freeing this structure
355 struct ieee80211_fast_rx {
356 struct net_device *dev;
357 enum nl80211_iftype vif_type;
358 u8 vif_addr[ETH_ALEN] __aligned(2);
359 u8 rfc1042_hdr[6] __aligned(2);
360 __be16 control_port_protocol;
361 __le16 expected_ds_bits;
368 struct rcu_head rcu_head;
371 /* we use only values in the range 0-100, so pick a large precision */
372 DECLARE_EWMA(mesh_fail_avg, 20, 8)
373 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16)
376 * struct mesh_sta - mesh STA information
377 * @plink_lock: serialize access to plink fields
378 * @llid: Local link ID
379 * @plid: Peer link ID
380 * @aid: local aid supplied by peer
381 * @reason: Cancel reason on PLINK_HOLDING state
382 * @plink_retries: Retries in establishment
383 * @plink_state: peer link state
384 * @plink_timeout: timeout of peer link
385 * @plink_timer: peer link watch timer
386 * @plink_sta: peer link watch timer's sta_info
387 * @t_offset: timing offset relative to this host
388 * @t_offset_setpoint: reference timing offset of this sta to be used when
389 * calculating clockdrift
390 * @local_pm: local link-specific power save mode
391 * @peer_pm: peer-specific power save mode towards local STA
392 * @nonpeer_pm: STA power save mode towards non-peer neighbors
393 * @processed_beacon: set to true after peer rates and capabilities are
395 * @connected_to_gate: true if mesh STA has a path to a mesh gate
396 * @connected_to_as: true if mesh STA has a path to a authentication server
397 * @fail_avg: moving percentage of failed MSDUs
398 * @tx_rate_avg: moving average of tx bitrate
401 struct timer_list plink_timer;
402 struct sta_info *plink_sta;
405 s64 t_offset_setpoint;
407 spinlock_t plink_lock;
414 bool processed_beacon;
415 bool connected_to_gate;
416 bool connected_to_as;
418 enum nl80211_plink_state plink_state;
421 /* mesh power save */
422 enum nl80211_mesh_power_mode local_pm;
423 enum nl80211_mesh_power_mode peer_pm;
424 enum nl80211_mesh_power_mode nonpeer_pm;
426 /* moving percentage of failed MSDUs */
427 struct ewma_mesh_fail_avg fail_avg;
428 /* moving average of tx bitrate */
429 struct ewma_mesh_tx_rate_avg tx_rate_avg;
432 DECLARE_EWMA(signal, 10, 8)
434 struct ieee80211_sta_rx_stats {
435 unsigned long packets;
436 unsigned long last_rx;
437 unsigned long num_duplicates;
438 unsigned long fragments;
439 unsigned long dropped;
442 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
444 struct u64_stats_sync syncp;
446 u64 msdu[IEEE80211_NUM_TIDS + 1];
450 * IEEE 802.11-2016 (10.6 "Defragmentation") recommends support for "concurrent
451 * reception of at least one MSDU per access category per associated STA"
452 * on APs, or "at least one MSDU per access category" on other interface types.
454 * This limit can be increased by changing this define, at the cost of slower
455 * frame reassembly and increased memory use while fragments are pending.
457 #define IEEE80211_FRAGMENT_MAX 4
459 struct ieee80211_fragment_entry {
460 struct sk_buff_head skb_list;
461 unsigned long first_frag_time;
466 u8 check_sequential_pn:1, /* needed for CCMP/GCMP */
468 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
469 unsigned int key_color;
472 struct ieee80211_fragment_cache {
473 struct ieee80211_fragment_entry entries[IEEE80211_FRAGMENT_MAX];
478 * The bandwidth threshold below which the per-station CoDel parameters will be
479 * scaled to be more lenient (to prevent starvation of slow stations). This
480 * value will be scaled by the number of active stations when it is being
483 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
486 * struct sta_info - STA information
488 * This structure collects information about a station that
489 * mac80211 is communicating with.
491 * @list: global linked list entry
492 * @free_list: list entry for keeping track of stations to free
493 * @hash_node: hash node for rhashtable
494 * @addr: station's MAC address - duplicated from public part to
495 * let the hash table work with just a single cacheline
496 * @local: pointer to the global information
497 * @sdata: virtual interface this station belongs to
498 * @ptk: peer keys negotiated with this station, if any
499 * @ptk_idx: last installed peer key index
500 * @gtk: group keys negotiated with this station, if any
501 * @rate_ctrl: rate control algorithm reference
502 * @rate_ctrl_lock: spinlock used to protect rate control data
503 * (data inside the algorithm, so serializes calls there)
504 * @rate_ctrl_priv: rate control private per-STA pointer
505 * @lock: used for locking all fields that require locking, see comments
506 * in the header file.
507 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
508 * @listen_interval: listen interval of this station, when we're acting as AP
509 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
510 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
511 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
512 * when it leaves power saving state or polls
513 * @tx_filtered: buffers (per AC) of frames we already tried to
514 * transmit but were filtered by hardware due to STA having
515 * entered power saving state, these are also delivered to
516 * the station when it leaves powersave or polls for frames
517 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
518 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
519 * @assoc_at: clock boottime (in ns) of last association
520 * @last_connected: time (in seconds) when a station got connected
521 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
522 * plus one for non-QoS frames)
523 * @tid_seq: per-TID sequence numbers for sending to this STA
524 * @airtime: per-AC struct airtime_info describing airtime statistics for this
526 * @ampdu_mlme: A-MPDU state machine state
527 * @mesh: mesh STA information
528 * @debugfs_dir: debug filesystem directory dentry
529 * @dead: set to true when sta is unlinked
530 * @removed: set to true when sta is being removed from sta_list
531 * @uploaded: set to true when sta is uploaded to the driver
532 * @sta: station information we share with the driver
533 * @sta_state: duplicates information about station state (for debug)
534 * @rcu_head: RCU head used for freeing this station struct
535 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
536 * taken from HT/VHT capabilities or VHT operating mode notification
537 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
539 * @cipher_scheme: optional cipher scheme for this station
540 * @cparams: CoDel parameters for this station.
541 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
542 * @fast_tx: TX fastpath information
543 * @fast_rx: RX fastpath information
544 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
546 * @tx_stats: TX statistics
547 * @tx_stats.packets: # of packets transmitted
548 * @tx_stats.bytes: # of bytes in all packets transmitted
549 * @tx_stats.last_rate: last TX rate
550 * @tx_stats.msdu: # of transmitted MSDUs per TID
551 * @rx_stats: RX statistics
552 * @rx_stats_avg: averaged RX statistics
553 * @rx_stats_avg.signal: averaged signal
554 * @rx_stats_avg.chain_signal: averaged per-chain signal
555 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
556 * this (by advertising the USES_RSS hw flag)
557 * @status_stats: TX status statistics
558 * @status_stats.filtered: # of filtered frames
559 * @status_stats.retry_failed: # of frames that failed after retry
560 * @status_stats.retry_count: # of retries attempted
561 * @status_stats.lost_packets: # of lost packets
562 * @status_stats.last_pkt_time: timestamp of last ACKed packet
563 * @status_stats.msdu_retries: # of MSDU retries
564 * @status_stats.msdu_failed: # of failed MSDUs
565 * @status_stats.last_ack: last ack timestamp (jiffies)
566 * @status_stats.last_ack_signal: last ACK signal
567 * @status_stats.ack_signal_filled: last ACK signal validity
568 * @status_stats.avg_ack_signal: average ACK signal
569 * @frags: fragment cache
572 /* General information, mostly static */
573 struct list_head list, free_list;
574 struct rcu_head rcu_head;
575 struct rhlist_head hash_node;
577 struct ieee80211_local *local;
578 struct ieee80211_sub_if_data *sdata;
579 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS +
580 NUM_DEFAULT_MGMT_KEYS +
581 NUM_DEFAULT_BEACON_KEYS];
582 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
584 struct rate_control_ref *rate_ctrl;
585 void *rate_ctrl_priv;
586 spinlock_t rate_ctrl_lock;
589 struct ieee80211_fast_tx __rcu *fast_tx;
590 struct ieee80211_fast_rx __rcu *fast_rx;
591 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
593 #ifdef CONFIG_MAC80211_MESH
594 struct mesh_sta *mesh;
597 struct work_struct drv_deliver_wk;
606 enum ieee80211_sta_state sta_state;
608 /* use the accessors defined below */
609 unsigned long _flags;
611 /* STA powersave lock and frame queues */
613 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
614 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
615 unsigned long driver_buffered_tids;
616 unsigned long txq_buffered_tids;
621 /* Updated from RX path only, no locking requirements */
622 struct ieee80211_sta_rx_stats rx_stats;
624 struct ewma_signal signal;
625 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
628 /* Plus 1 for non-QoS frames */
629 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
631 /* Updated from TX status path only, no locking requirements */
633 unsigned long filtered;
634 unsigned long retry_failed, retry_count;
635 unsigned int lost_packets;
636 unsigned long last_pkt_time;
637 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
638 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
639 unsigned long last_ack;
641 bool ack_signal_filled;
642 struct ewma_avg_signal avg_ack_signal;
645 /* Updated from TX path only, no locking requirements */
647 u64 packets[IEEE80211_NUM_ACS];
648 u64 bytes[IEEE80211_NUM_ACS];
649 struct ieee80211_tx_rate last_rate;
650 struct rate_info last_rate_info;
651 u64 msdu[IEEE80211_NUM_TIDS + 1];
653 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
655 struct airtime_info airtime[IEEE80211_NUM_ACS];
658 * Aggregation information, locked with lock.
660 struct sta_ampdu_mlme ampdu_mlme;
662 #ifdef CONFIG_MAC80211_DEBUGFS
663 struct dentry *debugfs_dir;
666 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
668 enum ieee80211_smps_mode known_smps_mode;
669 const struct ieee80211_cipher_scheme *cipher_scheme;
671 struct codel_params cparams;
675 struct cfg80211_chan_def tdls_chandef;
677 struct ieee80211_fragment_cache frags;
680 struct ieee80211_sta sta;
683 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
685 #ifdef CONFIG_MAC80211_MESH
686 return sta->mesh->plink_state;
688 return NL80211_PLINK_LISTEN;
691 static inline void set_sta_flag(struct sta_info *sta,
692 enum ieee80211_sta_info_flags flag)
694 WARN_ON(flag == WLAN_STA_AUTH ||
695 flag == WLAN_STA_ASSOC ||
696 flag == WLAN_STA_AUTHORIZED);
697 set_bit(flag, &sta->_flags);
700 static inline void clear_sta_flag(struct sta_info *sta,
701 enum ieee80211_sta_info_flags flag)
703 WARN_ON(flag == WLAN_STA_AUTH ||
704 flag == WLAN_STA_ASSOC ||
705 flag == WLAN_STA_AUTHORIZED);
706 clear_bit(flag, &sta->_flags);
709 static inline int test_sta_flag(struct sta_info *sta,
710 enum ieee80211_sta_info_flags flag)
712 return test_bit(flag, &sta->_flags);
715 static inline int test_and_clear_sta_flag(struct sta_info *sta,
716 enum ieee80211_sta_info_flags flag)
718 WARN_ON(flag == WLAN_STA_AUTH ||
719 flag == WLAN_STA_ASSOC ||
720 flag == WLAN_STA_AUTHORIZED);
721 return test_and_clear_bit(flag, &sta->_flags);
724 static inline int test_and_set_sta_flag(struct sta_info *sta,
725 enum ieee80211_sta_info_flags flag)
727 WARN_ON(flag == WLAN_STA_AUTH ||
728 flag == WLAN_STA_ASSOC ||
729 flag == WLAN_STA_AUTHORIZED);
730 return test_and_set_bit(flag, &sta->_flags);
733 int sta_info_move_state(struct sta_info *sta,
734 enum ieee80211_sta_state new_state);
736 static inline void sta_info_pre_move_state(struct sta_info *sta,
737 enum ieee80211_sta_state new_state)
741 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
743 ret = sta_info_move_state(sta, new_state);
748 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
749 struct tid_ampdu_tx *tid_tx);
751 static inline struct tid_ampdu_tx *
752 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
754 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
755 lockdep_is_held(&sta->lock) ||
756 lockdep_is_held(&sta->ampdu_mlme.mtx));
759 /* Maximum number of frames to buffer per power saving station per AC */
760 #define STA_MAX_TX_BUFFER 64
762 /* Minimum buffered frame expiry time. If STA uses listen interval that is
763 * smaller than this value, the minimum value here is used instead. */
764 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
766 /* How often station data is cleaned up (e.g., expiration of buffered frames)
768 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
770 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
774 * Get a STA info, must be under RCU read lock.
776 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
779 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
782 /* user must hold sta_mtx or be in RCU critical section */
783 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
784 const u8 *sta_addr, const u8 *vif_addr);
786 #define for_each_sta_info(local, _addr, _sta, _tmp) \
787 rhl_for_each_entry_rcu(_sta, _tmp, \
788 sta_info_hash_lookup(local, _addr), hash_node)
791 * Get STA info by index, BROKEN!
793 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
796 * Create a new STA info, caller owns returned structure
797 * until sta_info_insert().
799 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
800 const u8 *addr, gfp_t gfp);
802 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
805 * Insert STA info into hash table/list, returns zero or a
806 * -EEXIST if (if the same MAC address is already present).
808 * Calling the non-rcu version makes the caller relinquish,
809 * the _rcu version calls read_lock_rcu() and must be called
812 int sta_info_insert(struct sta_info *sta);
813 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
815 int __must_check __sta_info_destroy(struct sta_info *sta);
816 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
818 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
821 void sta_info_recalc_tim(struct sta_info *sta);
823 int sta_info_init(struct ieee80211_local *local);
824 void sta_info_stop(struct ieee80211_local *local);
827 * __sta_info_flush - flush matching STA entries from the STA table
829 * Returns the number of removed STA entries.
831 * @sdata: sdata to remove all stations from
832 * @vlans: if the given interface is an AP interface, also flush VLANs
834 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
837 * sta_info_flush - flush matching STA entries from the STA table
839 * Returns the number of removed STA entries.
841 * @sdata: sdata to remove all stations from
843 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
845 return __sta_info_flush(sdata, false);
848 void sta_set_rate_info_tx(struct sta_info *sta,
849 const struct ieee80211_tx_rate *rate,
850 struct rate_info *rinfo);
851 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
854 u32 sta_get_expected_throughput(struct sta_info *sta);
856 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
857 unsigned long exp_time);
858 u8 sta_info_tx_streams(struct sta_info *sta);
860 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
861 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
862 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
864 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
866 enum sta_stats_type {
867 STA_STATS_RATE_TYPE_INVALID = 0,
868 STA_STATS_RATE_TYPE_LEGACY,
869 STA_STATS_RATE_TYPE_HT,
870 STA_STATS_RATE_TYPE_VHT,
871 STA_STATS_RATE_TYPE_HE,
872 STA_STATS_RATE_TYPE_S1G,
875 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
876 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
877 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
878 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
879 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
880 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
881 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
882 #define STA_STATS_FIELD_BW GENMASK(11, 8)
883 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
884 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
885 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16)
886 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19)
887 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21)
889 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
890 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
892 #define STA_STATS_RATE_INVALID 0
894 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
898 r = STA_STATS_FIELD(BW, s->bw);
900 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
901 r |= STA_STATS_FIELD(SGI, 1);
903 switch (s->encoding) {
905 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
906 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
907 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
910 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
911 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
914 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
915 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
916 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
919 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
920 r |= STA_STATS_FIELD(HE_NSS, s->nss);
921 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
922 r |= STA_STATS_FIELD(HE_GI, s->he_gi);
923 r |= STA_STATS_FIELD(HE_RU, s->he_ru);
924 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
928 return STA_STATS_RATE_INVALID;
934 #endif /* STA_INFO_H */