2 * Copyright 2002-2005, Devicescape Software, Inc.
3 * Copyright 2013-2014 Intel Mobile Communications GmbH
4 * Copyright(c) 2015-2016 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/etherdevice.h>
20 #include <linux/rhashtable.h>
21 #include <linux/u64_stats_sync.h>
25 * enum ieee80211_sta_info_flags - Stations flags
27 * These flags are used with &struct sta_info's @flags member, but
28 * only indirectly with set_sta_flag() and friends.
30 * @WLAN_STA_AUTH: Station is authenticated.
31 * @WLAN_STA_ASSOC: Station is associated.
32 * @WLAN_STA_PS_STA: Station is in power-save mode
33 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
34 * This bit is always checked so needs to be enabled for all stations
35 * when virtual port control is not in use.
36 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
38 * @WLAN_STA_WDS: Station is one of our WDS peers.
39 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
40 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
41 * frame to this station is transmitted.
42 * @WLAN_STA_MFP: Management frame protection is used with this STA.
43 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
44 * during suspend/resume and station removal.
45 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
46 * power-save mode logically to flush frames that might still
48 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
49 * station in power-save mode, reply when the driver unblocks.
50 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
51 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
52 * packets. This means the link is enabled.
53 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
55 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
56 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
58 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
59 * the BSS base channel.
60 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
61 * keeping station in power-save mode, reply when the driver
62 * unblocks the station.
63 * @WLAN_STA_SP: Station is in a service period, so don't try to
64 * reply to other uAPSD trigger frames or PS-Poll.
65 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
66 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
67 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
68 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
69 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
70 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
71 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
72 * until pending frames are delivered
74 * @NUM_WLAN_STA_FLAGS: number of defined flags
76 enum ieee80211_sta_info_flags
{
81 WLAN_STA_SHORT_PREAMBLE
,
83 WLAN_STA_CLEAR_PS_FILT
,
89 WLAN_STA_TDLS_PEER_AUTH
,
90 WLAN_STA_TDLS_INITIATOR
,
91 WLAN_STA_TDLS_CHAN_SWITCH
,
92 WLAN_STA_TDLS_OFF_CHANNEL
,
93 WLAN_STA_TDLS_WIDER_BW
,
98 WLAN_STA_RATE_CONTROL
,
99 WLAN_STA_TOFFSET_KNOWN
,
101 WLAN_STA_MPSP_RECIPIENT
,
107 #define ADDBA_RESP_INTERVAL HZ
108 #define HT_AGG_MAX_RETRIES 15
109 #define HT_AGG_BURST_RETRIES 3
110 #define HT_AGG_RETRIES_PERIOD (15 * HZ)
112 #define HT_AGG_STATE_DRV_READY 0
113 #define HT_AGG_STATE_RESPONSE_RECEIVED 1
114 #define HT_AGG_STATE_OPERATIONAL 2
115 #define HT_AGG_STATE_STOPPING 3
116 #define HT_AGG_STATE_WANT_START 4
117 #define HT_AGG_STATE_WANT_STOP 5
119 enum ieee80211_agg_stop_reason
{
121 AGG_STOP_LOCAL_REQUEST
,
122 AGG_STOP_PEER_REQUEST
,
123 AGG_STOP_DESTROY_STA
,
127 * struct tid_ampdu_tx - TID aggregation information (Tx).
129 * @rcu_head: rcu head for freeing structure
130 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
131 * @addba_resp_timer: timer for peer's response to addba request
132 * @pending: pending frames queue -- use sta's spinlock to protect
133 * @dialog_token: dialog token for aggregation session
134 * @timeout: session timeout value to be filled in ADDBA requests
135 * @state: session state (see above)
136 * @last_tx: jiffies of last tx activity
137 * @stop_initiator: initiator of a session stop
138 * @tx_stop: TX DelBA frame when stopping
139 * @buf_size: reorder buffer size at receiver
140 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
141 * @bar_pending: BAR needs to be re-sent
142 * @amsdu: support A-MSDU withing A-MDPU
144 * This structure's lifetime is managed by RCU, assignments to
145 * the array holding it must hold the aggregation mutex.
147 * The TX path can access it under RCU lock-free if, and
148 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
149 * set. Otherwise, the TX path must also acquire the spinlock
150 * and re-check the state, see comments in the tx code
153 struct tid_ampdu_tx
{
154 struct rcu_head rcu_head
;
155 struct timer_list session_timer
;
156 struct timer_list addba_resp_timer
;
157 struct sk_buff_head pending
;
159 unsigned long last_tx
;
172 * struct tid_ampdu_rx - TID aggregation information (Rx).
174 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
175 * A-MSDU with individually reported subframes.
176 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
177 * the reorder buffer that should be ignored when releasing frames
178 * @reorder_time: jiffies when skb was added
179 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
180 * @reorder_timer: releases expired frames from the reorder buffer.
181 * @last_rx: jiffies of last rx activity
182 * @head_seq_num: head sequence number in reordering buffer.
183 * @stored_mpdu_num: number of MPDUs in reordering buffer
184 * @ssn: Starting Sequence Number expected to be aggregated.
185 * @buf_size: buffer size for incoming A-MPDUs
186 * @timeout: reset timer value (in TUs).
187 * @rcu_head: RCU head used for freeing this struct
188 * @reorder_lock: serializes access to reorder buffer, see below.
189 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
191 * @removed: this session is removed (but might have been found due to RCU)
193 * This structure's lifetime is managed by RCU, assignments to
194 * the array holding it must hold the aggregation mutex.
196 * The @reorder_lock is used to protect the members of this
197 * struct, except for @timeout, @buf_size and @dialog_token,
198 * which are constant across the lifetime of the struct (the
199 * dialog token being used only for debugging).
201 struct tid_ampdu_rx
{
202 struct rcu_head rcu_head
;
203 spinlock_t reorder_lock
;
204 u64 reorder_buf_filtered
;
205 struct sk_buff_head
*reorder_buf
;
206 unsigned long *reorder_time
;
207 struct timer_list session_timer
;
208 struct timer_list reorder_timer
;
209 unsigned long last_rx
;
220 * struct sta_ampdu_mlme - STA aggregation information.
222 * @mtx: mutex to protect all TX data (except non-NULL assignments
223 * to tid_tx[idx], which are protected by the sta spinlock)
224 * tid_start_tx is also protected by sta->lock.
225 * @tid_rx: aggregation info for Rx per TID -- RCU protected
226 * @tid_rx_token: dialog tokens for valid aggregation sessions
227 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
228 * RX timer expired until the work for it runs
229 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
230 * driver requested to close until the work for it runs
231 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
232 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
233 * unexpected aggregation related frames outside a session
234 * @work: work struct for starting/stopping aggregation
235 * @tid_tx: aggregation info for Tx per TID
236 * @tid_start_tx: sessions where start was requested
237 * @last_addba_req_time: timestamp of the last addBA request.
238 * @addba_req_num: number of times addBA request has been sent.
239 * @dialog_token_allocator: dialog token enumerator for each new session;
241 struct sta_ampdu_mlme
{
244 struct tid_ampdu_rx __rcu
*tid_rx
[IEEE80211_NUM_TIDS
];
245 u8 tid_rx_token
[IEEE80211_NUM_TIDS
];
246 unsigned long tid_rx_timer_expired
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
247 unsigned long tid_rx_stop_requested
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
248 unsigned long agg_session_valid
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
249 unsigned long unexpected_agg
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
251 struct work_struct work
;
252 struct tid_ampdu_tx __rcu
*tid_tx
[IEEE80211_NUM_TIDS
];
253 struct tid_ampdu_tx
*tid_start_tx
[IEEE80211_NUM_TIDS
];
254 unsigned long last_addba_req_time
[IEEE80211_NUM_TIDS
];
255 u8 addba_req_num
[IEEE80211_NUM_TIDS
];
256 u8 dialog_token_allocator
;
260 /* Value to indicate no TID reservation */
261 #define IEEE80211_TID_UNRESERVED 0xff
263 #define IEEE80211_FAST_XMIT_MAX_IV 18
266 * struct ieee80211_fast_tx - TX fastpath information
267 * @key: key to use for hw crypto
268 * @hdr: the 802.11 header to put with the frame
269 * @hdr_len: actual 802.11 header length
270 * @sa_offs: offset of the SA
271 * @da_offs: offset of the DA
272 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
273 * @band: band this will be transmitted on, for tx_info
274 * @rcu_head: RCU head to free this struct
276 * This struct is small enough so that the common case (maximum crypto
277 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
280 struct ieee80211_fast_tx
{
281 struct ieee80211_key
*key
;
283 u8 sa_offs
, da_offs
, pn_offs
;
285 u8 hdr
[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV
+
286 sizeof(rfc1042_header
)] __aligned(2);
288 struct rcu_head rcu_head
;
292 * struct ieee80211_fast_rx - RX fastpath information
293 * @dev: netdevice for reporting the SKB
294 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
295 * @vif_addr: interface address
296 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
297 * @control_port_protocol: control port protocol copied from sdata
298 * @expected_ds_bits: from/to DS bits expected
299 * @icv_len: length of the MIC if present
300 * @key: bool indicating encryption is expected (key is set)
301 * @sta_notify: notify the MLME code (once)
302 * @internal_forward: forward froms internally on AP/VLAN type interfaces
303 * @uses_rss: copy of USES_RSS hw flag
304 * @da_offs: offset of the DA in the header (for header conversion)
305 * @sa_offs: offset of the SA in the header (for header conversion)
306 * @rcu_head: RCU head for freeing this structure
308 struct ieee80211_fast_rx
{
309 struct net_device
*dev
;
310 enum nl80211_iftype vif_type
;
311 u8 vif_addr
[ETH_ALEN
] __aligned(2);
312 u8 rfc1042_hdr
[6] __aligned(2);
313 __be16 control_port_protocol
;
314 __le16 expected_ds_bits
;
322 struct rcu_head rcu_head
;
326 * struct mesh_sta - mesh STA information
327 * @plink_lock: serialize access to plink fields
328 * @llid: Local link ID
329 * @plid: Peer link ID
330 * @aid: local aid supplied by peer
331 * @reason: Cancel reason on PLINK_HOLDING state
332 * @plink_retries: Retries in establishment
333 * @plink_state: peer link state
334 * @plink_timeout: timeout of peer link
335 * @plink_timer: peer link watch timer
336 * @t_offset: timing offset relative to this host
337 * @t_offset_setpoint: reference timing offset of this sta to be used when
338 * calculating clockdrift
339 * @local_pm: local link-specific power save mode
340 * @peer_pm: peer-specific power save mode towards local STA
341 * @nonpeer_pm: STA power save mode towards non-peer neighbors
342 * @processed_beacon: set to true after peer rates and capabilities are
344 * @fail_avg: moving percentage of failed MSDUs
347 struct timer_list plink_timer
;
350 s64 t_offset_setpoint
;
352 spinlock_t plink_lock
;
359 bool processed_beacon
;
361 enum nl80211_plink_state plink_state
;
364 /* mesh power save */
365 enum nl80211_mesh_power_mode local_pm
;
366 enum nl80211_mesh_power_mode peer_pm
;
367 enum nl80211_mesh_power_mode nonpeer_pm
;
369 /* moving percentage of failed MSDUs */
370 unsigned int fail_avg
;
373 DECLARE_EWMA(signal
, 1024, 8)
375 struct ieee80211_sta_rx_stats
{
376 unsigned long packets
;
377 unsigned long last_rx
;
378 unsigned long num_duplicates
;
379 unsigned long fragments
;
380 unsigned long dropped
;
383 s8 chain_signal_last
[IEEE80211_MAX_CHAINS
];
385 struct u64_stats_sync syncp
;
387 u64 msdu
[IEEE80211_NUM_TIDS
+ 1];
391 * struct sta_info - STA information
393 * This structure collects information about a station that
394 * mac80211 is communicating with.
396 * @list: global linked list entry
397 * @free_list: list entry for keeping track of stations to free
398 * @hash_node: hash node for rhashtable
399 * @addr: station's MAC address - duplicated from public part to
400 * let the hash table work with just a single cacheline
401 * @local: pointer to the global information
402 * @sdata: virtual interface this station belongs to
403 * @ptk: peer keys negotiated with this station, if any
404 * @ptk_idx: last installed peer key index
405 * @gtk: group keys negotiated with this station, if any
406 * @rate_ctrl: rate control algorithm reference
407 * @rate_ctrl_lock: spinlock used to protect rate control data
408 * (data inside the algorithm, so serializes calls there)
409 * @rate_ctrl_priv: rate control private per-STA pointer
410 * @lock: used for locking all fields that require locking, see comments
411 * in the header file.
412 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
413 * @listen_interval: listen interval of this station, when we're acting as AP
414 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
415 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
416 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
417 * when it leaves power saving state or polls
418 * @tx_filtered: buffers (per AC) of frames we already tried to
419 * transmit but were filtered by hardware due to STA having
420 * entered power saving state, these are also delivered to
421 * the station when it leaves powersave or polls for frames
422 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
423 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
424 * @last_connected: time (in seconds) when a station got connected
425 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
426 * plus one for non-QoS frames)
427 * @tid_seq: per-TID sequence numbers for sending to this STA
428 * @ampdu_mlme: A-MPDU state machine state
429 * @timer_to_tid: identity mapping to ID timers
430 * @mesh: mesh STA information
431 * @debugfs_dir: debug filesystem directory dentry
432 * @dead: set to true when sta is unlinked
433 * @removed: set to true when sta is being removed from sta_list
434 * @uploaded: set to true when sta is uploaded to the driver
435 * @sta: station information we share with the driver
436 * @sta_state: duplicates information about station state (for debug)
437 * @rcu_head: RCU head used for freeing this station struct
438 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
439 * taken from HT/VHT capabilities or VHT operating mode notification
440 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
442 * @cipher_scheme: optional cipher scheme for this station
443 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
444 * @fast_tx: TX fastpath information
445 * @fast_rx: RX fastpath information
446 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
448 * @tx_stats: TX statistics
449 * @rx_stats: RX statistics
450 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
451 * this (by advertising the USES_RSS hw flag)
452 * @status_stats: TX status statistics
455 /* General information, mostly static */
456 struct list_head list
, free_list
;
457 struct rcu_head rcu_head
;
458 struct rhlist_head hash_node
;
460 struct ieee80211_local
*local
;
461 struct ieee80211_sub_if_data
*sdata
;
462 struct ieee80211_key __rcu
*gtk
[NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
];
463 struct ieee80211_key __rcu
*ptk
[NUM_DEFAULT_KEYS
];
465 struct rate_control_ref
*rate_ctrl
;
466 void *rate_ctrl_priv
;
467 spinlock_t rate_ctrl_lock
;
470 struct ieee80211_fast_tx __rcu
*fast_tx
;
471 struct ieee80211_fast_rx __rcu
*fast_rx
;
472 struct ieee80211_sta_rx_stats __percpu
*pcpu_rx_stats
;
474 #ifdef CONFIG_MAC80211_MESH
475 struct mesh_sta
*mesh
;
478 struct work_struct drv_deliver_wk
;
487 enum ieee80211_sta_state sta_state
;
489 /* use the accessors defined below */
490 unsigned long _flags
;
492 /* STA powersave lock and frame queues */
494 struct sk_buff_head ps_tx_buf
[IEEE80211_NUM_ACS
];
495 struct sk_buff_head tx_filtered
[IEEE80211_NUM_ACS
];
496 unsigned long driver_buffered_tids
;
497 unsigned long txq_buffered_tids
;
501 /* Updated from RX path only, no locking requirements */
502 struct ieee80211_sta_rx_stats rx_stats
;
504 struct ewma_signal signal
;
505 struct ewma_signal chain_signal
[IEEE80211_MAX_CHAINS
];
508 /* Plus 1 for non-QoS frames */
509 __le16 last_seq_ctrl
[IEEE80211_NUM_TIDS
+ 1];
511 /* Updated from TX status path only, no locking requirements */
513 unsigned long filtered
;
514 unsigned long retry_failed
, retry_count
;
515 unsigned int lost_packets
;
516 unsigned long last_tdls_pkt_time
;
517 u64 msdu_retries
[IEEE80211_NUM_TIDS
+ 1];
518 u64 msdu_failed
[IEEE80211_NUM_TIDS
+ 1];
519 unsigned long last_ack
;
522 /* Updated from TX path only, no locking requirements */
524 u64 packets
[IEEE80211_NUM_ACS
];
525 u64 bytes
[IEEE80211_NUM_ACS
];
526 struct ieee80211_tx_rate last_rate
;
527 u64 msdu
[IEEE80211_NUM_TIDS
+ 1];
529 u16 tid_seq
[IEEE80211_QOS_CTL_TID_MASK
+ 1];
532 * Aggregation information, locked with lock.
534 struct sta_ampdu_mlme ampdu_mlme
;
535 u8 timer_to_tid
[IEEE80211_NUM_TIDS
];
537 #ifdef CONFIG_MAC80211_DEBUGFS
538 struct dentry
*debugfs_dir
;
541 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth
;
543 enum ieee80211_smps_mode known_smps_mode
;
544 const struct ieee80211_cipher_scheme
*cipher_scheme
;
548 struct cfg80211_chan_def tdls_chandef
;
551 struct ieee80211_sta sta
;
554 static inline enum nl80211_plink_state
sta_plink_state(struct sta_info
*sta
)
556 #ifdef CONFIG_MAC80211_MESH
557 return sta
->mesh
->plink_state
;
559 return NL80211_PLINK_LISTEN
;
562 static inline void set_sta_flag(struct sta_info
*sta
,
563 enum ieee80211_sta_info_flags flag
)
565 WARN_ON(flag
== WLAN_STA_AUTH
||
566 flag
== WLAN_STA_ASSOC
||
567 flag
== WLAN_STA_AUTHORIZED
);
568 set_bit(flag
, &sta
->_flags
);
571 static inline void clear_sta_flag(struct sta_info
*sta
,
572 enum ieee80211_sta_info_flags flag
)
574 WARN_ON(flag
== WLAN_STA_AUTH
||
575 flag
== WLAN_STA_ASSOC
||
576 flag
== WLAN_STA_AUTHORIZED
);
577 clear_bit(flag
, &sta
->_flags
);
580 static inline int test_sta_flag(struct sta_info
*sta
,
581 enum ieee80211_sta_info_flags flag
)
583 return test_bit(flag
, &sta
->_flags
);
586 static inline int test_and_clear_sta_flag(struct sta_info
*sta
,
587 enum ieee80211_sta_info_flags flag
)
589 WARN_ON(flag
== WLAN_STA_AUTH
||
590 flag
== WLAN_STA_ASSOC
||
591 flag
== WLAN_STA_AUTHORIZED
);
592 return test_and_clear_bit(flag
, &sta
->_flags
);
595 static inline int test_and_set_sta_flag(struct sta_info
*sta
,
596 enum ieee80211_sta_info_flags flag
)
598 WARN_ON(flag
== WLAN_STA_AUTH
||
599 flag
== WLAN_STA_ASSOC
||
600 flag
== WLAN_STA_AUTHORIZED
);
601 return test_and_set_bit(flag
, &sta
->_flags
);
604 int sta_info_move_state(struct sta_info
*sta
,
605 enum ieee80211_sta_state new_state
);
607 static inline void sta_info_pre_move_state(struct sta_info
*sta
,
608 enum ieee80211_sta_state new_state
)
612 WARN_ON_ONCE(test_sta_flag(sta
, WLAN_STA_INSERTED
));
614 ret
= sta_info_move_state(sta
, new_state
);
619 void ieee80211_assign_tid_tx(struct sta_info
*sta
, int tid
,
620 struct tid_ampdu_tx
*tid_tx
);
622 static inline struct tid_ampdu_tx
*
623 rcu_dereference_protected_tid_tx(struct sta_info
*sta
, int tid
)
625 return rcu_dereference_protected(sta
->ampdu_mlme
.tid_tx
[tid
],
626 lockdep_is_held(&sta
->lock
) ||
627 lockdep_is_held(&sta
->ampdu_mlme
.mtx
));
630 /* Maximum number of frames to buffer per power saving station per AC */
631 #define STA_MAX_TX_BUFFER 64
633 /* Minimum buffered frame expiry time. If STA uses listen interval that is
634 * smaller than this value, the minimum value here is used instead. */
635 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
637 /* How often station data is cleaned up (e.g., expiration of buffered frames)
639 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
641 struct rhlist_head
*sta_info_hash_lookup(struct ieee80211_local
*local
,
645 * Get a STA info, must be under RCU read lock.
647 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
650 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
653 #define for_each_sta_info(local, _addr, _sta, _tmp) \
654 rhl_for_each_entry_rcu(_sta, _tmp, \
655 sta_info_hash_lookup(local, _addr), hash_node)
658 * Get STA info by index, BROKEN!
660 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
663 * Create a new STA info, caller owns returned structure
664 * until sta_info_insert().
666 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
667 const u8
*addr
, gfp_t gfp
);
669 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
);
672 * Insert STA info into hash table/list, returns zero or a
673 * -EEXIST if (if the same MAC address is already present).
675 * Calling the non-rcu version makes the caller relinquish,
676 * the _rcu version calls read_lock_rcu() and must be called
679 int sta_info_insert(struct sta_info
*sta
);
680 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
);
682 int __must_check
__sta_info_destroy(struct sta_info
*sta
);
683 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
,
685 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
688 void sta_info_recalc_tim(struct sta_info
*sta
);
690 int sta_info_init(struct ieee80211_local
*local
);
691 void sta_info_stop(struct ieee80211_local
*local
);
694 * sta_info_flush - flush matching STA entries from the STA table
696 * Returns the number of removed STA entries.
698 * @sdata: sdata to remove all stations from
699 * @vlans: if the given interface is an AP interface, also flush VLANs
701 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
);
703 static inline int sta_info_flush(struct ieee80211_sub_if_data
*sdata
)
705 return __sta_info_flush(sdata
, false);
708 void sta_set_rate_info_tx(struct sta_info
*sta
,
709 const struct ieee80211_tx_rate
*rate
,
710 struct rate_info
*rinfo
);
711 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
);
713 u32
sta_get_expected_throughput(struct sta_info
*sta
);
715 void ieee80211_sta_expire(struct ieee80211_sub_if_data
*sdata
,
716 unsigned long exp_time
);
717 u8
sta_info_tx_streams(struct sta_info
*sta
);
719 void ieee80211_sta_ps_deliver_wakeup(struct sta_info
*sta
);
720 void ieee80211_sta_ps_deliver_poll_response(struct sta_info
*sta
);
721 void ieee80211_sta_ps_deliver_uapsd(struct sta_info
*sta
);
723 unsigned long ieee80211_sta_last_active(struct sta_info
*sta
);
725 #define STA_STATS_RATE_INVALID 0
726 #define STA_STATS_RATE_VHT 0x8000
727 #define STA_STATS_RATE_HT 0x4000
728 #define STA_STATS_RATE_LEGACY 0x2000
729 #define STA_STATS_RATE_SGI 0x1000
730 #define STA_STATS_RATE_BW_SHIFT 9
731 #define STA_STATS_RATE_BW_MASK (0x7 << STA_STATS_RATE_BW_SHIFT)
733 static inline u16
sta_stats_encode_rate(struct ieee80211_rx_status
*s
)
737 if (s
->vht_flag
& RX_VHT_FLAG_80MHZ
)
738 r
|= RATE_INFO_BW_80
<< STA_STATS_RATE_BW_SHIFT
;
739 else if (s
->vht_flag
& RX_VHT_FLAG_160MHZ
)
740 r
|= RATE_INFO_BW_160
<< STA_STATS_RATE_BW_SHIFT
;
741 else if (s
->flag
& RX_FLAG_40MHZ
)
742 r
|= RATE_INFO_BW_40
<< STA_STATS_RATE_BW_SHIFT
;
743 else if (s
->flag
& RX_FLAG_10MHZ
)
744 r
|= RATE_INFO_BW_10
<< STA_STATS_RATE_BW_SHIFT
;
745 else if (s
->flag
& RX_FLAG_5MHZ
)
746 r
|= RATE_INFO_BW_5
<< STA_STATS_RATE_BW_SHIFT
;
748 r
|= RATE_INFO_BW_20
<< STA_STATS_RATE_BW_SHIFT
;
750 if (s
->flag
& RX_FLAG_SHORT_GI
)
751 r
|= STA_STATS_RATE_SGI
;
753 if (s
->flag
& RX_FLAG_VHT
)
754 r
|= STA_STATS_RATE_VHT
| (s
->vht_nss
<< 4);
755 else if (s
->flag
& RX_FLAG_HT
)
756 r
|= STA_STATS_RATE_HT
;
758 r
|= STA_STATS_RATE_LEGACY
| (s
->band
<< 4);
763 #endif /* STA_INFO_H */