2 * Copyright 2002-2005, Devicescape Software, Inc.
3 * Copyright 2013-2014 Intel Mobile Communications GmbH
4 * Copyright(c) 2015-2017 Intel Deutschland GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
14 #include <linux/list.h>
15 #include <linux/types.h>
16 #include <linux/if_ether.h>
17 #include <linux/workqueue.h>
18 #include <linux/average.h>
19 #include <linux/bitfield.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rhashtable.h>
22 #include <linux/u64_stats_sync.h>
26 * enum ieee80211_sta_info_flags - Stations flags
28 * These flags are used with &struct sta_info's @flags member, but
29 * only indirectly with set_sta_flag() and friends.
31 * @WLAN_STA_AUTH: Station is authenticated.
32 * @WLAN_STA_ASSOC: Station is associated.
33 * @WLAN_STA_PS_STA: Station is in power-save mode
34 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
35 * This bit is always checked so needs to be enabled for all stations
36 * when virtual port control is not in use.
37 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
39 * @WLAN_STA_WDS: Station is one of our WDS peers.
40 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
41 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
42 * frame to this station is transmitted.
43 * @WLAN_STA_MFP: Management frame protection is used with this STA.
44 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
45 * during suspend/resume and station removal.
46 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
47 * power-save mode logically to flush frames that might still
49 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
50 * station in power-save mode, reply when the driver unblocks.
51 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
52 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
53 * packets. This means the link is enabled.
54 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
56 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
57 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
59 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
60 * the BSS base channel.
61 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
62 * keeping station in power-save mode, reply when the driver
63 * unblocks the station.
64 * @WLAN_STA_SP: Station is in a service period, so don't try to
65 * reply to other uAPSD trigger frames or PS-Poll.
66 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
67 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
68 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
69 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
70 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
71 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
72 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
73 * until pending frames are delivered
75 * @NUM_WLAN_STA_FLAGS: number of defined flags
77 enum ieee80211_sta_info_flags
{
82 WLAN_STA_SHORT_PREAMBLE
,
84 WLAN_STA_CLEAR_PS_FILT
,
90 WLAN_STA_TDLS_PEER_AUTH
,
91 WLAN_STA_TDLS_INITIATOR
,
92 WLAN_STA_TDLS_CHAN_SWITCH
,
93 WLAN_STA_TDLS_OFF_CHANNEL
,
94 WLAN_STA_TDLS_WIDER_BW
,
99 WLAN_STA_RATE_CONTROL
,
100 WLAN_STA_TOFFSET_KNOWN
,
102 WLAN_STA_MPSP_RECIPIENT
,
108 #define ADDBA_RESP_INTERVAL HZ
109 #define HT_AGG_MAX_RETRIES 15
110 #define HT_AGG_BURST_RETRIES 3
111 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
113 #define HT_AGG_STATE_DRV_READY 0
114 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
115 #define HT_AGG_STATE_OPERATIONAL 2
116 #define HT_AGG_STATE_STOPPING 3
117 #define HT_AGG_STATE_WANT_START 4
118 #define HT_AGG_STATE_WANT_STOP 5
119 #define HT_AGG_STATE_START_CB 6
120 #define HT_AGG_STATE_STOP_CB 7
122 enum ieee80211_agg_stop_reason
{
124 AGG_STOP_LOCAL_REQUEST
,
125 AGG_STOP_PEER_REQUEST
,
126 AGG_STOP_DESTROY_STA
,
130 * struct tid_ampdu_tx - TID aggregation information (Tx).
132 * @rcu_head: rcu head for freeing structure
133 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
134 * @addba_resp_timer: timer for peer's response to addba request
135 * @pending: pending frames queue -- use sta's spinlock to protect
136 * @dialog_token: dialog token for aggregation session
137 * @timeout: session timeout value to be filled in ADDBA requests
138 * @state: session state (see above)
139 * @last_tx: jiffies of last tx activity
140 * @stop_initiator: initiator of a session stop
141 * @tx_stop: TX DelBA frame when stopping
142 * @buf_size: reorder buffer size at receiver
143 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
144 * @bar_pending: BAR needs to be re-sent
145 * @amsdu: support A-MSDU withing A-MDPU
147 * This structure's lifetime is managed by RCU, assignments to
148 * the array holding it must hold the aggregation mutex.
150 * The TX path can access it under RCU lock-free if, and
151 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
152 * set. Otherwise, the TX path must also acquire the spinlock
153 * and re-check the state, see comments in the tx code
156 struct tid_ampdu_tx
{
157 struct rcu_head rcu_head
;
158 struct timer_list session_timer
;
159 struct timer_list addba_resp_timer
;
160 struct sk_buff_head pending
;
162 unsigned long last_tx
;
175 * struct tid_ampdu_rx - TID aggregation information (Rx).
177 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
178 * A-MSDU with individually reported subframes.
179 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
180 * the reorder buffer that should be ignored when releasing frames
181 * @reorder_time: jiffies when skb was added
182 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
183 * @reorder_timer: releases expired frames from the reorder buffer.
184 * @last_rx: jiffies of last rx activity
185 * @head_seq_num: head sequence number in reordering buffer.
186 * @stored_mpdu_num: number of MPDUs in reordering buffer
187 * @ssn: Starting Sequence Number expected to be aggregated.
188 * @buf_size: buffer size for incoming A-MPDUs
189 * @timeout: reset timer value (in TUs).
190 * @rcu_head: RCU head used for freeing this struct
191 * @reorder_lock: serializes access to reorder buffer, see below.
192 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
194 * @removed: this session is removed (but might have been found due to RCU)
195 * @started: this session has started (head ssn or higher was received)
197 * This structure's lifetime is managed by RCU, assignments to
198 * the array holding it must hold the aggregation mutex.
200 * The @reorder_lock is used to protect the members of this
201 * struct, except for @timeout, @buf_size and @dialog_token,
202 * which are constant across the lifetime of the struct (the
203 * dialog token being used only for debugging).
205 struct tid_ampdu_rx
{
206 struct rcu_head rcu_head
;
207 spinlock_t reorder_lock
;
208 u64 reorder_buf_filtered
;
209 struct sk_buff_head
*reorder_buf
;
210 unsigned long *reorder_time
;
211 struct timer_list session_timer
;
212 struct timer_list reorder_timer
;
213 unsigned long last_rx
;
225 * struct sta_ampdu_mlme - STA aggregation information.
227 * @mtx: mutex to protect all TX data (except non-NULL assignments
228 * to tid_tx[idx], which are protected by the sta spinlock)
229 * tid_start_tx is also protected by sta->lock.
230 * @tid_rx: aggregation info for Rx per TID -- RCU protected
231 * @tid_rx_token: dialog tokens for valid aggregation sessions
232 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
233 * RX timer expired until the work for it runs
234 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
235 * driver requested to close until the work for it runs
236 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
237 * to be treated as started/stopped due to offloading
238 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
239 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
240 * unexpected aggregation related frames outside a session
241 * @work: work struct for starting/stopping aggregation
242 * @tid_tx: aggregation info for Tx per TID
243 * @tid_start_tx: sessions where start was requested
244 * @last_addba_req_time: timestamp of the last addBA request.
245 * @addba_req_num: number of times addBA request has been sent.
246 * @dialog_token_allocator: dialog token enumerator for each new session;
248 struct sta_ampdu_mlme
{
251 struct tid_ampdu_rx __rcu
*tid_rx
[IEEE80211_NUM_TIDS
];
252 u8 tid_rx_token
[IEEE80211_NUM_TIDS
];
253 unsigned long tid_rx_timer_expired
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
254 unsigned long tid_rx_stop_requested
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
255 unsigned long tid_rx_manage_offl
[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS
)];
256 unsigned long agg_session_valid
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
257 unsigned long unexpected_agg
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
259 struct work_struct work
;
260 struct tid_ampdu_tx __rcu
*tid_tx
[IEEE80211_NUM_TIDS
];
261 struct tid_ampdu_tx
*tid_start_tx
[IEEE80211_NUM_TIDS
];
262 unsigned long last_addba_req_time
[IEEE80211_NUM_TIDS
];
263 u8 addba_req_num
[IEEE80211_NUM_TIDS
];
264 u8 dialog_token_allocator
;
268 /* Value to indicate no TID reservation */
269 #define IEEE80211_TID_UNRESERVED 0xff
271 #define IEEE80211_FAST_XMIT_MAX_IV 18
274 * struct ieee80211_fast_tx - TX fastpath information
275 * @key: key to use for hw crypto
276 * @hdr: the 802.11 header to put with the frame
277 * @hdr_len: actual 802.11 header length
278 * @sa_offs: offset of the SA
279 * @da_offs: offset of the DA
280 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
281 * @band: band this will be transmitted on, for tx_info
282 * @rcu_head: RCU head to free this struct
284 * This struct is small enough so that the common case (maximum crypto
285 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
288 struct ieee80211_fast_tx
{
289 struct ieee80211_key
*key
;
291 u8 sa_offs
, da_offs
, pn_offs
;
293 u8 hdr
[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV
+
294 sizeof(rfc1042_header
)] __aligned(2);
296 struct rcu_head rcu_head
;
300 * struct ieee80211_fast_rx - RX fastpath information
301 * @dev: netdevice for reporting the SKB
302 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
303 * @vif_addr: interface address
304 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
305 * @control_port_protocol: control port protocol copied from sdata
306 * @expected_ds_bits: from/to DS bits expected
307 * @icv_len: length of the MIC if present
308 * @key: bool indicating encryption is expected (key is set)
309 * @sta_notify: notify the MLME code (once)
310 * @internal_forward: forward froms internally on AP/VLAN type interfaces
311 * @uses_rss: copy of USES_RSS hw flag
312 * @da_offs: offset of the DA in the header (for header conversion)
313 * @sa_offs: offset of the SA in the header (for header conversion)
314 * @rcu_head: RCU head for freeing this structure
316 struct ieee80211_fast_rx
{
317 struct net_device
*dev
;
318 enum nl80211_iftype vif_type
;
319 u8 vif_addr
[ETH_ALEN
] __aligned(2);
320 u8 rfc1042_hdr
[6] __aligned(2);
321 __be16 control_port_protocol
;
322 __le16 expected_ds_bits
;
330 struct rcu_head rcu_head
;
333 /* we use only values in the range 0-100, so pick a large precision */
334 DECLARE_EWMA(mesh_fail_avg
, 20, 8)
337 * struct mesh_sta - mesh STA information
338 * @plink_lock: serialize access to plink fields
339 * @llid: Local link ID
340 * @plid: Peer link ID
341 * @aid: local aid supplied by peer
342 * @reason: Cancel reason on PLINK_HOLDING state
343 * @plink_retries: Retries in establishment
344 * @plink_state: peer link state
345 * @plink_timeout: timeout of peer link
346 * @plink_timer: peer link watch timer
347 * @t_offset: timing offset relative to this host
348 * @t_offset_setpoint: reference timing offset of this sta to be used when
349 * calculating clockdrift
350 * @local_pm: local link-specific power save mode
351 * @peer_pm: peer-specific power save mode towards local STA
352 * @nonpeer_pm: STA power save mode towards non-peer neighbors
353 * @processed_beacon: set to true after peer rates and capabilities are
355 * @fail_avg: moving percentage of failed MSDUs
358 struct timer_list plink_timer
;
361 s64 t_offset_setpoint
;
363 spinlock_t plink_lock
;
370 bool processed_beacon
;
372 enum nl80211_plink_state plink_state
;
375 /* mesh power save */
376 enum nl80211_mesh_power_mode local_pm
;
377 enum nl80211_mesh_power_mode peer_pm
;
378 enum nl80211_mesh_power_mode nonpeer_pm
;
380 /* moving percentage of failed MSDUs */
381 struct ewma_mesh_fail_avg fail_avg
;
384 DECLARE_EWMA(signal
, 10, 8)
386 struct ieee80211_sta_rx_stats
{
387 unsigned long packets
;
388 unsigned long last_rx
;
389 unsigned long num_duplicates
;
390 unsigned long fragments
;
391 unsigned long dropped
;
394 s8 chain_signal_last
[IEEE80211_MAX_CHAINS
];
396 struct u64_stats_sync syncp
;
398 u64 msdu
[IEEE80211_NUM_TIDS
+ 1];
402 * The bandwidth threshold below which the per-station CoDel parameters will be
403 * scaled to be more lenient (to prevent starvation of slow stations). This
404 * value will be scaled by the number of active stations when it is being
407 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
410 * struct sta_info - STA information
412 * This structure collects information about a station that
413 * mac80211 is communicating with.
415 * @list: global linked list entry
416 * @free_list: list entry for keeping track of stations to free
417 * @hash_node: hash node for rhashtable
418 * @addr: station's MAC address - duplicated from public part to
419 * let the hash table work with just a single cacheline
420 * @local: pointer to the global information
421 * @sdata: virtual interface this station belongs to
422 * @ptk: peer keys negotiated with this station, if any
423 * @ptk_idx: last installed peer key index
424 * @gtk: group keys negotiated with this station, if any
425 * @rate_ctrl: rate control algorithm reference
426 * @rate_ctrl_lock: spinlock used to protect rate control data
427 * (data inside the algorithm, so serializes calls there)
428 * @rate_ctrl_priv: rate control private per-STA pointer
429 * @lock: used for locking all fields that require locking, see comments
430 * in the header file.
431 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
432 * @listen_interval: listen interval of this station, when we're acting as AP
433 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
434 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
435 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
436 * when it leaves power saving state or polls
437 * @tx_filtered: buffers (per AC) of frames we already tried to
438 * transmit but were filtered by hardware due to STA having
439 * entered power saving state, these are also delivered to
440 * the station when it leaves powersave or polls for frames
441 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
442 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
443 * @last_connected: time (in seconds) when a station got connected
444 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
445 * plus one for non-QoS frames)
446 * @tid_seq: per-TID sequence numbers for sending to this STA
447 * @ampdu_mlme: A-MPDU state machine state
448 * @timer_to_tid: identity mapping to ID timers
449 * @mesh: mesh STA information
450 * @debugfs_dir: debug filesystem directory dentry
451 * @dead: set to true when sta is unlinked
452 * @removed: set to true when sta is being removed from sta_list
453 * @uploaded: set to true when sta is uploaded to the driver
454 * @sta: station information we share with the driver
455 * @sta_state: duplicates information about station state (for debug)
456 * @rcu_head: RCU head used for freeing this station struct
457 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
458 * taken from HT/VHT capabilities or VHT operating mode notification
459 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
461 * @cipher_scheme: optional cipher scheme for this station
462 * @cparams: CoDel parameters for this station.
463 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
464 * @fast_tx: TX fastpath information
465 * @fast_rx: RX fastpath information
466 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
468 * @tx_stats: TX statistics
469 * @rx_stats: RX statistics
470 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
471 * this (by advertising the USES_RSS hw flag)
472 * @status_stats: TX status statistics
475 /* General information, mostly static */
476 struct list_head list
, free_list
;
477 struct rcu_head rcu_head
;
478 struct rhlist_head hash_node
;
480 struct ieee80211_local
*local
;
481 struct ieee80211_sub_if_data
*sdata
;
482 struct ieee80211_key __rcu
*gtk
[NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
];
483 struct ieee80211_key __rcu
*ptk
[NUM_DEFAULT_KEYS
];
485 struct rate_control_ref
*rate_ctrl
;
486 void *rate_ctrl_priv
;
487 spinlock_t rate_ctrl_lock
;
490 struct ieee80211_fast_tx __rcu
*fast_tx
;
491 struct ieee80211_fast_rx __rcu
*fast_rx
;
492 struct ieee80211_sta_rx_stats __percpu
*pcpu_rx_stats
;
494 #ifdef CONFIG_MAC80211_MESH
495 struct mesh_sta
*mesh
;
498 struct work_struct drv_deliver_wk
;
507 enum ieee80211_sta_state sta_state
;
509 /* use the accessors defined below */
510 unsigned long _flags
;
512 /* STA powersave lock and frame queues */
514 struct sk_buff_head ps_tx_buf
[IEEE80211_NUM_ACS
];
515 struct sk_buff_head tx_filtered
[IEEE80211_NUM_ACS
];
516 unsigned long driver_buffered_tids
;
517 unsigned long txq_buffered_tids
;
521 /* Updated from RX path only, no locking requirements */
522 struct ieee80211_sta_rx_stats rx_stats
;
524 struct ewma_signal signal
;
525 struct ewma_signal chain_signal
[IEEE80211_MAX_CHAINS
];
528 /* Plus 1 for non-QoS frames */
529 __le16 last_seq_ctrl
[IEEE80211_NUM_TIDS
+ 1];
531 /* Updated from TX status path only, no locking requirements */
533 unsigned long filtered
;
534 unsigned long retry_failed
, retry_count
;
535 unsigned int lost_packets
;
536 unsigned long last_tdls_pkt_time
;
537 u64 msdu_retries
[IEEE80211_NUM_TIDS
+ 1];
538 u64 msdu_failed
[IEEE80211_NUM_TIDS
+ 1];
539 unsigned long last_ack
;
542 /* Updated from TX path only, no locking requirements */
544 u64 packets
[IEEE80211_NUM_ACS
];
545 u64 bytes
[IEEE80211_NUM_ACS
];
546 struct ieee80211_tx_rate last_rate
;
547 u64 msdu
[IEEE80211_NUM_TIDS
+ 1];
549 u16 tid_seq
[IEEE80211_QOS_CTL_TID_MASK
+ 1];
552 * Aggregation information, locked with lock.
554 struct sta_ampdu_mlme ampdu_mlme
;
555 u8 timer_to_tid
[IEEE80211_NUM_TIDS
];
557 #ifdef CONFIG_MAC80211_DEBUGFS
558 struct dentry
*debugfs_dir
;
561 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth
;
563 enum ieee80211_smps_mode known_smps_mode
;
564 const struct ieee80211_cipher_scheme
*cipher_scheme
;
566 struct codel_params cparams
;
570 struct cfg80211_chan_def tdls_chandef
;
573 struct ieee80211_sta sta
;
576 static inline enum nl80211_plink_state
sta_plink_state(struct sta_info
*sta
)
578 #ifdef CONFIG_MAC80211_MESH
579 return sta
->mesh
->plink_state
;
581 return NL80211_PLINK_LISTEN
;
584 static inline void set_sta_flag(struct sta_info
*sta
,
585 enum ieee80211_sta_info_flags flag
)
587 WARN_ON(flag
== WLAN_STA_AUTH
||
588 flag
== WLAN_STA_ASSOC
||
589 flag
== WLAN_STA_AUTHORIZED
);
590 set_bit(flag
, &sta
->_flags
);
593 static inline void clear_sta_flag(struct sta_info
*sta
,
594 enum ieee80211_sta_info_flags flag
)
596 WARN_ON(flag
== WLAN_STA_AUTH
||
597 flag
== WLAN_STA_ASSOC
||
598 flag
== WLAN_STA_AUTHORIZED
);
599 clear_bit(flag
, &sta
->_flags
);
602 static inline int test_sta_flag(struct sta_info
*sta
,
603 enum ieee80211_sta_info_flags flag
)
605 return test_bit(flag
, &sta
->_flags
);
608 static inline int test_and_clear_sta_flag(struct sta_info
*sta
,
609 enum ieee80211_sta_info_flags flag
)
611 WARN_ON(flag
== WLAN_STA_AUTH
||
612 flag
== WLAN_STA_ASSOC
||
613 flag
== WLAN_STA_AUTHORIZED
);
614 return test_and_clear_bit(flag
, &sta
->_flags
);
617 static inline int test_and_set_sta_flag(struct sta_info
*sta
,
618 enum ieee80211_sta_info_flags flag
)
620 WARN_ON(flag
== WLAN_STA_AUTH
||
621 flag
== WLAN_STA_ASSOC
||
622 flag
== WLAN_STA_AUTHORIZED
);
623 return test_and_set_bit(flag
, &sta
->_flags
);
626 int sta_info_move_state(struct sta_info
*sta
,
627 enum ieee80211_sta_state new_state
);
629 static inline void sta_info_pre_move_state(struct sta_info
*sta
,
630 enum ieee80211_sta_state new_state
)
634 WARN_ON_ONCE(test_sta_flag(sta
, WLAN_STA_INSERTED
));
636 ret
= sta_info_move_state(sta
, new_state
);
641 void ieee80211_assign_tid_tx(struct sta_info
*sta
, int tid
,
642 struct tid_ampdu_tx
*tid_tx
);
644 static inline struct tid_ampdu_tx
*
645 rcu_dereference_protected_tid_tx(struct sta_info
*sta
, int tid
)
647 return rcu_dereference_protected(sta
->ampdu_mlme
.tid_tx
[tid
],
648 lockdep_is_held(&sta
->lock
) ||
649 lockdep_is_held(&sta
->ampdu_mlme
.mtx
));
652 /* Maximum number of frames to buffer per power saving station per AC */
653 #define STA_MAX_TX_BUFFER 64
655 /* Minimum buffered frame expiry time. If STA uses listen interval that is
656 * smaller than this value, the minimum value here is used instead. */
657 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
659 /* How often station data is cleaned up (e.g., expiration of buffered frames)
661 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
663 struct rhlist_head
*sta_info_hash_lookup(struct ieee80211_local
*local
,
667 * Get a STA info, must be under RCU read lock.
669 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
672 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
675 #define for_each_sta_info(local, _addr, _sta, _tmp) \
676 rhl_for_each_entry_rcu(_sta, _tmp, \
677 sta_info_hash_lookup(local, _addr), hash_node)
680 * Get STA info by index, BROKEN!
682 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
685 * Create a new STA info, caller owns returned structure
686 * until sta_info_insert().
688 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
689 const u8
*addr
, gfp_t gfp
);
691 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
);
694 * Insert STA info into hash table/list, returns zero or a
695 * -EEXIST if (if the same MAC address is already present).
697 * Calling the non-rcu version makes the caller relinquish,
698 * the _rcu version calls read_lock_rcu() and must be called
701 int sta_info_insert(struct sta_info
*sta
);
702 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
);
704 int __must_check
__sta_info_destroy(struct sta_info
*sta
);
705 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
,
707 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
710 void sta_info_recalc_tim(struct sta_info
*sta
);
712 int sta_info_init(struct ieee80211_local
*local
);
713 void sta_info_stop(struct ieee80211_local
*local
);
716 * sta_info_flush - flush matching STA entries from the STA table
718 * Returns the number of removed STA entries.
720 * @sdata: sdata to remove all stations from
721 * @vlans: if the given interface is an AP interface, also flush VLANs
723 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
);
725 static inline int sta_info_flush(struct ieee80211_sub_if_data
*sdata
)
727 return __sta_info_flush(sdata
, false);
730 void sta_set_rate_info_tx(struct sta_info
*sta
,
731 const struct ieee80211_tx_rate
*rate
,
732 struct rate_info
*rinfo
);
733 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
);
735 u32
sta_get_expected_throughput(struct sta_info
*sta
);
737 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
738 unsigned long exp_time
);
739 u8
sta_info_tx_streams(struct sta_info
*sta
);
741 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
);
742 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
);
743 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
);
745 unsigned long ieee80211_sta_last_active(struct sta_info
*sta
);
747 enum sta_stats_type
{
748 STA_STATS_RATE_TYPE_INVALID
= 0,
749 STA_STATS_RATE_TYPE_LEGACY
,
750 STA_STATS_RATE_TYPE_HT
,
751 STA_STATS_RATE_TYPE_VHT
,
754 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
755 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
756 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
757 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
758 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
759 #define STA_STATS_FIELD_BW GENMASK(11, 8)
760 #define STA_STATS_FIELD_SGI GENMASK(12, 12)
761 #define STA_STATS_FIELD_TYPE GENMASK(15, 13)
763 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
764 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
766 #define STA_STATS_RATE_INVALID 0
768 static inline u32
sta_stats_encode_rate(struct ieee80211_rx_status
*s
)
772 r
= STA_STATS_FIELD(BW
, s
->bw
);
774 if (s
->enc_flags
& RX_ENC_FLAG_SHORT_GI
)
775 r
|= STA_STATS_FIELD(SGI
, 1);
777 switch (s
->encoding
) {
779 r
|= STA_STATS_FIELD(TYPE
, STA_STATS_RATE_TYPE_VHT
);
780 r
|= STA_STATS_FIELD(VHT_NSS
, s
->nss
);
781 r
|= STA_STATS_FIELD(VHT_MCS
, s
->rate_idx
);
784 r
|= STA_STATS_FIELD(TYPE
, STA_STATS_RATE_TYPE_HT
);
785 r
|= STA_STATS_FIELD(HT_MCS
, s
->rate_idx
);
788 r
|= STA_STATS_FIELD(TYPE
, STA_STATS_RATE_TYPE_LEGACY
);
789 r
|= STA_STATS_FIELD(LEGACY_BAND
, s
->band
);
790 r
|= STA_STATS_FIELD(LEGACY_IDX
, s
->rate_idx
);
794 return STA_STATS_RATE_INVALID
;
800 #endif /* STA_INFO_H */