1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
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) 2020-2022 Intel Corporation
7 */
8
9 #ifndef STA_INFO_H
10 #define STA_INFO_H
11
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>
21 #include "key.h"
22
23 /**
24 * enum ieee80211_sta_info_flags - Stations flags
25 *
26 * These flags are used with &struct sta_info's @flags member, but
27 * only indirectly with set_sta_flag() and friends.
28 *
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
36 * frames.
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
46 * be in the queues
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
53 * station.
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
56 * TDLS peer
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
75 *
76 * @NUM_WLAN_STA_FLAGS: number of defined flags
77 */
78 enum ieee80211_sta_info_flags {
79 WLAN_STA_AUTH,
80 WLAN_STA_ASSOC,
81 WLAN_STA_PS_STA,
82 WLAN_STA_AUTHORIZED,
83 WLAN_STA_SHORT_PREAMBLE,
84 WLAN_STA_WDS,
85 WLAN_STA_CLEAR_PS_FILT,
86 WLAN_STA_MFP,
87 WLAN_STA_BLOCK_BA,
88 WLAN_STA_PS_DRIVER,
89 WLAN_STA_PSPOLL,
90 WLAN_STA_TDLS_PEER,
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,
96 WLAN_STA_UAPSD,
97 WLAN_STA_SP,
98 WLAN_STA_4ADDR_EVENT,
99 WLAN_STA_INSERTED,
100 WLAN_STA_RATE_CONTROL,
101 WLAN_STA_TOFFSET_KNOWN,
102 WLAN_STA_MPSP_OWNER,
103 WLAN_STA_MPSP_RECIPIENT,
104 WLAN_STA_PS_DELIVER,
105 WLAN_STA_USES_ENCRYPTION,
106 WLAN_STA_DECAP_OFFLOAD,
107
108 NUM_WLAN_STA_FLAGS,
109 };
110
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)
115
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
125
126 DECLARE_EWMA(avg_signal, 10, 8)
127 enum ieee80211_agg_stop_reason {
128 AGG_STOP_DECLINED,
129 AGG_STOP_LOCAL_REQUEST,
130 AGG_STOP_PEER_REQUEST,
131 AGG_STOP_DESTROY_STA,
132 };
133
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)
137
138 struct airtime_info {
139 u64 rx_airtime;
140 u64 tx_airtime;
141 u32 last_active;
142 s32 deficit;
143 atomic_t aql_tx_pending; /* Estimated airtime for frames pending */
144 u32 aql_limit_low;
145 u32 aql_limit_high;
146 };
147
148 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
149 struct sta_info *sta, u8 ac,
150 u16 tx_airtime, bool tx_completed);
151
152 struct sta_info;
153
154 /**
155 * struct tid_ampdu_tx - TID aggregation information (Tx).
156 *
157 * @rcu_head: rcu head for freeing structure
158 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
159 * @addba_resp_timer: timer for peer's response to addba request
160 * @pending: pending frames queue -- use sta's spinlock to protect
161 * @sta: station we are attached to
162 * @dialog_token: dialog token for aggregation session
163 * @timeout: session timeout value to be filled in ADDBA requests
164 * @tid: TID number
165 * @state: session state (see above)
166 * @last_tx: jiffies of last tx activity
167 * @stop_initiator: initiator of a session stop
168 * @tx_stop: TX DelBA frame when stopping
169 * @buf_size: reorder buffer size at receiver
170 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
171 * @bar_pending: BAR needs to be re-sent
172 * @amsdu: support A-MSDU withing A-MDPU
173 * @ssn: starting sequence number of the session
174 *
175 * This structure's lifetime is managed by RCU, assignments to
176 * the array holding it must hold the aggregation mutex.
177 *
178 * The TX path can access it under RCU lock-free if, and
179 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
180 * set. Otherwise, the TX path must also acquire the spinlock
181 * and re-check the state, see comments in the tx code
182 * touching it.
183 */
184 struct tid_ampdu_tx {
185 struct rcu_head rcu_head;
186 struct timer_list session_timer;
187 struct timer_list addba_resp_timer;
188 struct sk_buff_head pending;
189 struct sta_info *sta;
190 unsigned long state;
191 unsigned long last_tx;
192 u16 timeout;
193 u8 dialog_token;
194 u8 stop_initiator;
195 bool tx_stop;
196 u16 buf_size;
197 u16 ssn;
198
199 u16 failed_bar_ssn;
200 bool bar_pending;
201 bool amsdu;
202 u8 tid;
203 };
204
205 /**
206 * struct tid_ampdu_rx - TID aggregation information (Rx).
207 *
208 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
209 * A-MSDU with individually reported subframes.
210 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
211 * the reorder buffer that should be ignored when releasing frames
212 * @reorder_time: jiffies when skb was added
213 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
214 * @reorder_timer: releases expired frames from the reorder buffer.
215 * @sta: station we are attached to
216 * @last_rx: jiffies of last rx activity
217 * @head_seq_num: head sequence number in reordering buffer.
218 * @stored_mpdu_num: number of MPDUs in reordering buffer
219 * @ssn: Starting Sequence Number expected to be aggregated.
220 * @buf_size: buffer size for incoming A-MPDUs
221 * @timeout: reset timer value (in TUs).
222 * @tid: TID number
223 * @rcu_head: RCU head used for freeing this struct
224 * @reorder_lock: serializes access to reorder buffer, see below.
225 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
226 * and ssn.
227 * @removed: this session is removed (but might have been found due to RCU)
228 * @started: this session has started (head ssn or higher was received)
229 *
230 * This structure's lifetime is managed by RCU, assignments to
231 * the array holding it must hold the aggregation mutex.
232 *
233 * The @reorder_lock is used to protect the members of this
234 * struct, except for @timeout, @buf_size and @dialog_token,
235 * which are constant across the lifetime of the struct (the
236 * dialog token being used only for debugging).
237 */
238 struct tid_ampdu_rx {
239 struct rcu_head rcu_head;
240 spinlock_t reorder_lock;
241 u64 reorder_buf_filtered;
242 struct sk_buff_head *reorder_buf;
243 unsigned long *reorder_time;
244 struct sta_info *sta;
245 struct timer_list session_timer;
246 struct timer_list reorder_timer;
247 unsigned long last_rx;
248 u16 head_seq_num;
249 u16 stored_mpdu_num;
250 u16 ssn;
251 u16 buf_size;
252 u16 timeout;
253 u8 tid;
254 u8 auto_seq:1,
255 removed:1,
256 started:1;
257 };
258
259 /**
260 * struct sta_ampdu_mlme - STA aggregation information.
261 *
262 * @mtx: mutex to protect all TX data (except non-NULL assignments
263 * to tid_tx[idx], which are protected by the sta spinlock)
264 * tid_start_tx is also protected by sta->lock.
265 * @tid_rx: aggregation info for Rx per TID -- RCU protected
266 * @tid_rx_token: dialog tokens for valid aggregation sessions
267 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
268 * RX timer expired until the work for it runs
269 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
270 * driver requested to close until the work for it runs
271 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
272 * to be treated as started/stopped due to offloading
273 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
274 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
275 * unexpected aggregation related frames outside a session
276 * @work: work struct for starting/stopping aggregation
277 * @tid_tx: aggregation info for Tx per TID
278 * @tid_start_tx: sessions where start was requested
279 * @last_addba_req_time: timestamp of the last addBA request.
280 * @addba_req_num: number of times addBA request has been sent.
281 * @dialog_token_allocator: dialog token enumerator for each new session;
282 */
283 struct sta_ampdu_mlme {
284 struct mutex mtx;
285 /* rx */
286 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
287 u8 tid_rx_token[IEEE80211_NUM_TIDS];
288 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
289 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
290 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
291 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
292 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
293 /* tx */
294 struct work_struct work;
295 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
296 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
297 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
298 u8 addba_req_num[IEEE80211_NUM_TIDS];
299 u8 dialog_token_allocator;
300 };
301
302
303 /* Value to indicate no TID reservation */
304 #define IEEE80211_TID_UNRESERVED 0xff
305
306 #define IEEE80211_FAST_XMIT_MAX_IV 18
307
308 /**
309 * struct ieee80211_fast_tx - TX fastpath information
310 * @key: key to use for hw crypto
311 * @hdr: the 802.11 header to put with the frame
312 * @hdr_len: actual 802.11 header length
313 * @sa_offs: offset of the SA
314 * @da_offs: offset of the DA
315 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
316 * @band: band this will be transmitted on, for tx_info
317 * @rcu_head: RCU head to free this struct
318 *
319 * This struct is small enough so that the common case (maximum crypto
320 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
321 * cache line.
322 */
323 struct ieee80211_fast_tx {
324 struct ieee80211_key *key;
325 u8 hdr_len;
326 u8 sa_offs, da_offs, pn_offs;
327 u8 band;
328 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
329 sizeof(rfc1042_header)] __aligned(2);
330
331 struct rcu_head rcu_head;
332 };
333
334 /**
335 * struct ieee80211_fast_rx - RX fastpath information
336 * @dev: netdevice for reporting the SKB
337 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
338 * @vif_addr: interface address
339 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
340 * @control_port_protocol: control port protocol copied from sdata
341 * @expected_ds_bits: from/to DS bits expected
342 * @icv_len: length of the MIC if present
343 * @key: bool indicating encryption is expected (key is set)
344 * @internal_forward: forward froms internally on AP/VLAN type interfaces
345 * @uses_rss: copy of USES_RSS hw flag
346 * @da_offs: offset of the DA in the header (for header conversion)
347 * @sa_offs: offset of the SA in the header (for header conversion)
348 * @rcu_head: RCU head for freeing this structure
349 */
350 struct ieee80211_fast_rx {
351 struct net_device *dev;
352 enum nl80211_iftype vif_type;
353 u8 vif_addr[ETH_ALEN] __aligned(2);
354 u8 rfc1042_hdr[6] __aligned(2);
355 __be16 control_port_protocol;
356 __le16 expected_ds_bits;
357 u8 icv_len;
358 u8 key:1,
359 internal_forward:1,
360 uses_rss:1;
361 u8 da_offs, sa_offs;
362
363 struct rcu_head rcu_head;
364 };
365
366 /* we use only values in the range 0-100, so pick a large precision */
367 DECLARE_EWMA(mesh_fail_avg, 20, 8)
368 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16)
369
370 /**
371 * struct mesh_sta - mesh STA information
372 * @plink_lock: serialize access to plink fields
373 * @llid: Local link ID
374 * @plid: Peer link ID
375 * @aid: local aid supplied by peer
376 * @reason: Cancel reason on PLINK_HOLDING state
377 * @plink_retries: Retries in establishment
378 * @plink_state: peer link state
379 * @plink_timeout: timeout of peer link
380 * @plink_timer: peer link watch timer
381 * @plink_sta: peer link watch timer's sta_info
382 * @t_offset: timing offset relative to this host
383 * @t_offset_setpoint: reference timing offset of this sta to be used when
384 * calculating clockdrift
385 * @local_pm: local link-specific power save mode
386 * @peer_pm: peer-specific power save mode towards local STA
387 * @nonpeer_pm: STA power save mode towards non-peer neighbors
388 * @processed_beacon: set to true after peer rates and capabilities are
389 * processed
390 * @connected_to_gate: true if mesh STA has a path to a mesh gate
391 * @connected_to_as: true if mesh STA has a path to a authentication server
392 * @fail_avg: moving percentage of failed MSDUs
393 * @tx_rate_avg: moving average of tx bitrate
394 */
395 struct mesh_sta {
396 struct timer_list plink_timer;
397 struct sta_info *plink_sta;
398
399 s64 t_offset;
400 s64 t_offset_setpoint;
401
402 spinlock_t plink_lock;
403 u16 llid;
404 u16 plid;
405 u16 aid;
406 u16 reason;
407 u8 plink_retries;
408
409 bool processed_beacon;
410 bool connected_to_gate;
411 bool connected_to_as;
412
413 enum nl80211_plink_state plink_state;
414 u32 plink_timeout;
415
416 /* mesh power save */
417 enum nl80211_mesh_power_mode local_pm;
418 enum nl80211_mesh_power_mode peer_pm;
419 enum nl80211_mesh_power_mode nonpeer_pm;
420
421 /* moving percentage of failed MSDUs */
422 struct ewma_mesh_fail_avg fail_avg;
423 /* moving average of tx bitrate */
424 struct ewma_mesh_tx_rate_avg tx_rate_avg;
425 };
426
427 DECLARE_EWMA(signal, 10, 8)
428
429 struct ieee80211_sta_rx_stats {
430 unsigned long packets;
431 unsigned long last_rx;
432 unsigned long num_duplicates;
433 unsigned long fragments;
434 unsigned long dropped;
435 int last_signal;
436 u8 chains;
437 s8 chain_signal_last[IEEE80211_MAX_CHAINS];
438 u32 last_rate;
439 struct u64_stats_sync syncp;
440 u64 bytes;
441 u64 msdu[IEEE80211_NUM_TIDS + 1];
442 };
443
444 /*
445 * IEEE 802.11-2016 (10.6 "Defragmentation") recommends support for "concurrent
446 * reception of at least one MSDU per access category per associated STA"
447 * on APs, or "at least one MSDU per access category" on other interface types.
448 *
449 * This limit can be increased by changing this define, at the cost of slower
450 * frame reassembly and increased memory use while fragments are pending.
451 */
452 #define IEEE80211_FRAGMENT_MAX 4
453
454 struct ieee80211_fragment_entry {
455 struct sk_buff_head skb_list;
456 unsigned long first_frag_time;
457 u16 seq;
458 u16 extra_len;
459 u16 last_frag;
460 u8 rx_queue;
461 u8 check_sequential_pn:1, /* needed for CCMP/GCMP */
462 is_protected:1;
463 u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
464 unsigned int key_color;
465 };
466
467 struct ieee80211_fragment_cache {
468 struct ieee80211_fragment_entry entries[IEEE80211_FRAGMENT_MAX];
469 unsigned int next;
470 };
471
472 /*
473 * The bandwidth threshold below which the per-station CoDel parameters will be
474 * scaled to be more lenient (to prevent starvation of slow stations). This
475 * value will be scaled by the number of active stations when it is being
476 * applied.
477 */
478 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
479
480 /**
481 * struct link_sta_info - Link STA information
482 * All link specific sta info are stored here for reference. This can be
483 * a single entry for non-MLD STA or multiple entries for MLD STA
484 * @addr: Link MAC address - Can be same as MLD STA mac address and is always
485 * same for non-MLD STA. This is used as key for searching link STA
486 * @link_id: Link ID uniquely identifying the link STA. This is 0 for non-MLD
487 * and set to the corresponding vif LinkId for MLD STA
488 * @link_hash_node: hash node for rhashtable
489 * @sta: Points to the STA info
490 * @gtk: group keys negotiated with this station, if any
491 * @tx_stats: TX statistics
492 * @tx_stats.packets: # of packets transmitted
493 * @tx_stats.bytes: # of bytes in all packets transmitted
494 * @tx_stats.last_rate: last TX rate
495 * @tx_stats.msdu: # of transmitted MSDUs per TID
496 * @rx_stats: RX statistics
497 * @rx_stats_avg: averaged RX statistics
498 * @rx_stats_avg.signal: averaged signal
499 * @rx_stats_avg.chain_signal: averaged per-chain signal
500 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
501 * this (by advertising the USES_RSS hw flag)
502 * @status_stats: TX status statistics
503 * @status_stats.filtered: # of filtered frames
504 * @status_stats.retry_failed: # of frames that failed after retry
505 * @status_stats.retry_count: # of retries attempted
506 * @status_stats.lost_packets: # of lost packets
507 * @status_stats.last_pkt_time: timestamp of last ACKed packet
508 * @status_stats.msdu_retries: # of MSDU retries
509 * @status_stats.msdu_failed: # of failed MSDUs
510 * @status_stats.last_ack: last ack timestamp (jiffies)
511 * @status_stats.last_ack_signal: last ACK signal
512 * @status_stats.ack_signal_filled: last ACK signal validity
513 * @status_stats.avg_ack_signal: average ACK signal
514 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
515 * taken from HT/VHT capabilities or VHT operating mode notification
516 * @debugfs_dir: debug filesystem directory dentry
517 * @pub: public (driver visible) link STA data
518 * TODO Move other link params from sta_info as required for MLD operation
519 */
520 struct link_sta_info {
521 u8 addr[ETH_ALEN];
522 u8 link_id;
523
524 struct rhlist_head link_hash_node;
525
526 struct sta_info *sta;
527 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS +
528 NUM_DEFAULT_MGMT_KEYS +
529 NUM_DEFAULT_BEACON_KEYS];
530 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
531
532 /* Updated from RX path only, no locking requirements */
533 struct ieee80211_sta_rx_stats rx_stats;
534 struct {
535 struct ewma_signal signal;
536 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
537 } rx_stats_avg;
538
539 /* Updated from TX status path only, no locking requirements */
540 struct {
541 unsigned long filtered;
542 unsigned long retry_failed, retry_count;
543 unsigned int lost_packets;
544 unsigned long last_pkt_time;
545 u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
546 u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
547 unsigned long last_ack;
548 s8 last_ack_signal;
549 bool ack_signal_filled;
550 struct ewma_avg_signal avg_ack_signal;
551 } status_stats;
552
553 /* Updated from TX path only, no locking requirements */
554 struct {
555 u64 packets[IEEE80211_NUM_ACS];
556 u64 bytes[IEEE80211_NUM_ACS];
557 struct ieee80211_tx_rate last_rate;
558 struct rate_info last_rate_info;
559 u64 msdu[IEEE80211_NUM_TIDS + 1];
560 } tx_stats;
561
562 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
563
564 #ifdef CONFIG_MAC80211_DEBUGFS
565 struct dentry *debugfs_dir;
566 #endif
567
568 struct ieee80211_link_sta *pub;
569 };
570
571 /**
572 * struct sta_info - STA information
573 *
574 * This structure collects information about a station that
575 * mac80211 is communicating with.
576 *
577 * @list: global linked list entry
578 * @free_list: list entry for keeping track of stations to free
579 * @hash_node: hash node for rhashtable
580 * @addr: station's MAC address - duplicated from public part to
581 * let the hash table work with just a single cacheline
582 * @local: pointer to the global information
583 * @sdata: virtual interface this station belongs to
584 * @ptk: peer keys negotiated with this station, if any
585 * @ptk_idx: last installed peer key index
586 * @rate_ctrl: rate control algorithm reference
587 * @rate_ctrl_lock: spinlock used to protect rate control data
588 * (data inside the algorithm, so serializes calls there)
589 * @rate_ctrl_priv: rate control private per-STA pointer
590 * @lock: used for locking all fields that require locking, see comments
591 * in the header file.
592 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
593 * @listen_interval: listen interval of this station, when we're acting as AP
594 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
595 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
596 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
597 * when it leaves power saving state or polls
598 * @tx_filtered: buffers (per AC) of frames we already tried to
599 * transmit but were filtered by hardware due to STA having
600 * entered power saving state, these are also delivered to
601 * the station when it leaves powersave or polls for frames
602 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
603 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
604 * @assoc_at: clock boottime (in ns) of last association
605 * @last_connected: time (in seconds) when a station got connected
606 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
607 * plus one for non-QoS frames)
608 * @tid_seq: per-TID sequence numbers for sending to this STA
609 * @airtime: per-AC struct airtime_info describing airtime statistics for this
610 * station
611 * @airtime_weight: station weight for airtime fairness calculation purposes
612 * @ampdu_mlme: A-MPDU state machine state
613 * @mesh: mesh STA information
614 * @debugfs_dir: debug filesystem directory dentry
615 * @dead: set to true when sta is unlinked
616 * @removed: set to true when sta is being removed from sta_list
617 * @uploaded: set to true when sta is uploaded to the driver
618 * @sta: station information we share with the driver
619 * @sta_state: duplicates information about station state (for debug)
620 * @rcu_head: RCU head used for freeing this station struct
621 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
622 * taken from HT/VHT capabilities or VHT operating mode notification
623 * @cparams: CoDel parameters for this station.
624 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
625 * @amsdu_mesh_control: track the mesh A-MSDU format used by the peer:
626 *
627 * * -1: not yet known
628 * * 0: non-mesh A-MSDU length field
629 * * 1: big-endian mesh A-MSDU length field
630 * * 2: little-endian mesh A-MSDU length field
631 *
632 * @fast_tx: TX fastpath information
633 * @fast_rx: RX fastpath information
634 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
635 * the BSS one.
636 * @frags: fragment cache
637 * @cur: storage for aggregation data
638 * &struct ieee80211_sta points either here or to deflink.agg.
639 * @deflink: This is the default link STA information, for non MLO STA all link
640 * specific STA information is accessed through @deflink or through
641 * link[0] which points to address of @deflink. For MLO Link STA
642 * the first added link STA will point to deflink.
643 * @link: reference to Link Sta entries. For Non MLO STA, except 1st link,
644 * i.e link[0] all links would be assigned to NULL by default and
645 * would access link information via @deflink or link[0]. For MLO
646 * STA, first link STA being added will point its link pointer to
647 * @deflink address and remaining would be allocated and the address
648 * would be assigned to link[link_id] where link_id is the id assigned
649 * by the AP.
650 */
651 struct sta_info {
652 /* General information, mostly static */
653 struct list_head list, free_list;
654 struct rcu_head rcu_head;
655 struct rhlist_head hash_node;
656 u8 addr[ETH_ALEN];
657 struct ieee80211_local *local;
658 struct ieee80211_sub_if_data *sdata;
659 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
660 u8 ptk_idx;
661 struct rate_control_ref *rate_ctrl;
662 void *rate_ctrl_priv;
663 spinlock_t rate_ctrl_lock;
664 spinlock_t lock;
665
666 struct ieee80211_fast_tx __rcu *fast_tx;
667 struct ieee80211_fast_rx __rcu *fast_rx;
668
669 #ifdef CONFIG_MAC80211_MESH
670 struct mesh_sta *mesh;
671 #endif
672
673 struct work_struct drv_deliver_wk;
674
675 u16 listen_interval;
676
677 bool dead;
678 bool removed;
679
680 bool uploaded;
681
682 enum ieee80211_sta_state sta_state;
683
684 /* use the accessors defined below */
685 unsigned long _flags;
686
687 /* STA powersave lock and frame queues */
688 spinlock_t ps_lock;
689 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
690 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
691 unsigned long driver_buffered_tids;
692 unsigned long txq_buffered_tids;
693
694 u64 assoc_at;
695 long last_connected;
696
697 /* Plus 1 for non-QoS frames */
698 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
699
700 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
701
702 struct airtime_info airtime[IEEE80211_NUM_ACS];
703 u16 airtime_weight;
704
705 /*
706 * Aggregation information, locked with lock.
707 */
708 struct sta_ampdu_mlme ampdu_mlme;
709
710 #ifdef CONFIG_MAC80211_DEBUGFS
711 struct dentry *debugfs_dir;
712 #endif
713
714 struct codel_params cparams;
715
716 u8 reserved_tid;
717 s8 amsdu_mesh_control;
718
719 struct cfg80211_chan_def tdls_chandef;
720
721 struct ieee80211_fragment_cache frags;
722
723 struct ieee80211_sta_aggregates cur;
724 struct link_sta_info deflink;
725 struct link_sta_info __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
726
727 /* keep last! */
728 struct ieee80211_sta sta;
729 };
730
sta_plink_state(struct sta_info * sta)731 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
732 {
733 #ifdef CONFIG_MAC80211_MESH
734 return sta->mesh->plink_state;
735 #endif
736 return NL80211_PLINK_LISTEN;
737 }
738
set_sta_flag(struct sta_info * sta,enum ieee80211_sta_info_flags flag)739 static inline void set_sta_flag(struct sta_info *sta,
740 enum ieee80211_sta_info_flags flag)
741 {
742 WARN_ON(flag == WLAN_STA_AUTH ||
743 flag == WLAN_STA_ASSOC ||
744 flag == WLAN_STA_AUTHORIZED);
745 set_bit(flag, &sta->_flags);
746 }
747
clear_sta_flag(struct sta_info * sta,enum ieee80211_sta_info_flags flag)748 static inline void clear_sta_flag(struct sta_info *sta,
749 enum ieee80211_sta_info_flags flag)
750 {
751 WARN_ON(flag == WLAN_STA_AUTH ||
752 flag == WLAN_STA_ASSOC ||
753 flag == WLAN_STA_AUTHORIZED);
754 clear_bit(flag, &sta->_flags);
755 }
756
test_sta_flag(struct sta_info * sta,enum ieee80211_sta_info_flags flag)757 static inline int test_sta_flag(struct sta_info *sta,
758 enum ieee80211_sta_info_flags flag)
759 {
760 return test_bit(flag, &sta->_flags);
761 }
762
test_and_clear_sta_flag(struct sta_info * sta,enum ieee80211_sta_info_flags flag)763 static inline int test_and_clear_sta_flag(struct sta_info *sta,
764 enum ieee80211_sta_info_flags flag)
765 {
766 WARN_ON(flag == WLAN_STA_AUTH ||
767 flag == WLAN_STA_ASSOC ||
768 flag == WLAN_STA_AUTHORIZED);
769 return test_and_clear_bit(flag, &sta->_flags);
770 }
771
test_and_set_sta_flag(struct sta_info * sta,enum ieee80211_sta_info_flags flag)772 static inline int test_and_set_sta_flag(struct sta_info *sta,
773 enum ieee80211_sta_info_flags flag)
774 {
775 WARN_ON(flag == WLAN_STA_AUTH ||
776 flag == WLAN_STA_ASSOC ||
777 flag == WLAN_STA_AUTHORIZED);
778 return test_and_set_bit(flag, &sta->_flags);
779 }
780
781 int sta_info_move_state(struct sta_info *sta,
782 enum ieee80211_sta_state new_state);
783
sta_info_pre_move_state(struct sta_info * sta,enum ieee80211_sta_state new_state)784 static inline void sta_info_pre_move_state(struct sta_info *sta,
785 enum ieee80211_sta_state new_state)
786 {
787 int ret;
788
789 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
790
791 ret = sta_info_move_state(sta, new_state);
792 WARN_ON_ONCE(ret);
793 }
794
795
796 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
797 struct tid_ampdu_tx *tid_tx);
798
799 static inline struct tid_ampdu_tx *
rcu_dereference_protected_tid_tx(struct sta_info * sta,int tid)800 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
801 {
802 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
803 lockdep_is_held(&sta->lock) ||
804 lockdep_is_held(&sta->ampdu_mlme.mtx));
805 }
806
807 /* Maximum number of frames to buffer per power saving station per AC */
808 #define STA_MAX_TX_BUFFER 64
809
810 /* Minimum buffered frame expiry time. If STA uses listen interval that is
811 * smaller than this value, the minimum value here is used instead. */
812 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
813
814 /* How often station data is cleaned up (e.g., expiration of buffered frames)
815 */
816 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
817
818 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
819 const u8 *addr);
820
821 /*
822 * Get a STA info, must be under RCU read lock.
823 */
824 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
825 const u8 *addr);
826
827 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
828 const u8 *addr);
829
830 /* user must hold sta_mtx or be in RCU critical section */
831 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
832 const u8 *sta_addr, const u8 *vif_addr);
833
834 #define for_each_sta_info(local, _addr, _sta, _tmp) \
835 rhl_for_each_entry_rcu(_sta, _tmp, \
836 sta_info_hash_lookup(local, _addr), hash_node)
837
838 struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local,
839 const u8 *addr);
840
841 #define for_each_link_sta_info(local, _addr, _sta, _tmp) \
842 rhl_for_each_entry_rcu(_sta, _tmp, \
843 link_sta_info_hash_lookup(local, _addr), \
844 link_hash_node)
845
846 struct link_sta_info *
847 link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr);
848
849 /*
850 * Get STA info by index, BROKEN!
851 */
852 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
853 int idx);
854 /*
855 * Create a new STA info, caller owns returned structure
856 * until sta_info_insert().
857 */
858 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
859 const u8 *addr, gfp_t gfp);
860 struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata,
861 const u8 *mld_addr,
862 unsigned int link_id,
863 const u8 *link_addr,
864 gfp_t gfp);
865
866 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
867
868 /*
869 * Insert STA info into hash table/list, returns zero or a
870 * -EEXIST if (if the same MAC address is already present).
871 *
872 * Calling the non-rcu version makes the caller relinquish,
873 * the _rcu version calls read_lock_rcu() and must be called
874 * without it held.
875 */
876 int sta_info_insert(struct sta_info *sta);
877 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
878
879 int __must_check __sta_info_destroy(struct sta_info *sta);
880 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
881 const u8 *addr);
882 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
883 const u8 *addr);
884
885 void sta_info_recalc_tim(struct sta_info *sta);
886
887 int sta_info_init(struct ieee80211_local *local);
888 void sta_info_stop(struct ieee80211_local *local);
889
890 /**
891 * __sta_info_flush - flush matching STA entries from the STA table
892 *
893 * Returns the number of removed STA entries.
894 *
895 * @sdata: sdata to remove all stations from
896 * @vlans: if the given interface is an AP interface, also flush VLANs
897 */
898 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
899
900 /**
901 * sta_info_flush - flush matching STA entries from the STA table
902 *
903 * Returns the number of removed STA entries.
904 *
905 * @sdata: sdata to remove all stations from
906 */
sta_info_flush(struct ieee80211_sub_if_data * sdata)907 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
908 {
909 return __sta_info_flush(sdata, false);
910 }
911
912 void sta_set_rate_info_tx(struct sta_info *sta,
913 const struct ieee80211_tx_rate *rate,
914 struct rate_info *rinfo);
915 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
916 bool tidstats);
917
918 u32 sta_get_expected_throughput(struct sta_info *sta);
919
920 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
921 unsigned long exp_time);
922
923 int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id);
924 void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id);
925 int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id);
926 void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id);
927
928 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
929 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
930 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
931
932 unsigned long ieee80211_sta_last_active(struct sta_info *sta);
933
934 void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta,
935 const u8 *ext_capab,
936 unsigned int ext_capab_len);
937
938 void __ieee80211_sta_recalc_aggregates(struct sta_info *sta, u16 active_links);
939
940 enum sta_stats_type {
941 STA_STATS_RATE_TYPE_INVALID = 0,
942 STA_STATS_RATE_TYPE_LEGACY,
943 STA_STATS_RATE_TYPE_HT,
944 STA_STATS_RATE_TYPE_VHT,
945 STA_STATS_RATE_TYPE_HE,
946 STA_STATS_RATE_TYPE_S1G,
947 STA_STATS_RATE_TYPE_EHT,
948 };
949
950 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
951 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
952 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
953 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
954 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
955 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
956 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
957 #define STA_STATS_FIELD_EHT_MCS GENMASK( 3, 0)
958 #define STA_STATS_FIELD_EHT_NSS GENMASK( 7, 4)
959 #define STA_STATS_FIELD_BW GENMASK(12, 8)
960 #define STA_STATS_FIELD_SGI GENMASK(13, 13)
961 #define STA_STATS_FIELD_TYPE GENMASK(16, 14)
962 #define STA_STATS_FIELD_HE_RU GENMASK(19, 17)
963 #define STA_STATS_FIELD_HE_GI GENMASK(21, 20)
964 #define STA_STATS_FIELD_HE_DCM GENMASK(22, 22)
965 #define STA_STATS_FIELD_EHT_RU GENMASK(20, 17)
966 #define STA_STATS_FIELD_EHT_GI GENMASK(22, 21)
967
968 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
969 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
970
971 #define STA_STATS_RATE_INVALID 0
972
sta_stats_encode_rate(struct ieee80211_rx_status * s)973 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
974 {
975 u32 r;
976
977 r = STA_STATS_FIELD(BW, s->bw);
978
979 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
980 r |= STA_STATS_FIELD(SGI, 1);
981
982 switch (s->encoding) {
983 case RX_ENC_VHT:
984 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
985 r |= STA_STATS_FIELD(VHT_NSS, s->nss);
986 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
987 break;
988 case RX_ENC_HT:
989 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
990 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
991 break;
992 case RX_ENC_LEGACY:
993 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
994 r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
995 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
996 break;
997 case RX_ENC_HE:
998 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
999 r |= STA_STATS_FIELD(HE_NSS, s->nss);
1000 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
1001 r |= STA_STATS_FIELD(HE_GI, s->he_gi);
1002 r |= STA_STATS_FIELD(HE_RU, s->he_ru);
1003 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
1004 break;
1005 case RX_ENC_EHT:
1006 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_EHT);
1007 r |= STA_STATS_FIELD(EHT_NSS, s->nss);
1008 r |= STA_STATS_FIELD(EHT_MCS, s->rate_idx);
1009 r |= STA_STATS_FIELD(EHT_GI, s->eht.gi);
1010 r |= STA_STATS_FIELD(EHT_RU, s->eht.ru);
1011 break;
1012 default:
1013 WARN_ON(1);
1014 return STA_STATS_RATE_INVALID;
1015 }
1016
1017 return r;
1018 }
1019
1020 #endif /* STA_INFO_H */
1021