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 * @dialog_token: dialog token for aggregation session
188 * @rcu_head: RCU head used for freeing this struct
189 * @reorder_lock: serializes access to reorder buffer, see below.
190 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
192 * @removed: this session is removed (but might have been found due to RCU)
194 * This structure's lifetime is managed by RCU, assignments to
195 * the array holding it must hold the aggregation mutex.
197 * The @reorder_lock is used to protect the members of this
198 * struct, except for @timeout, @buf_size and @dialog_token,
199 * which are constant across the lifetime of the struct (the
200 * dialog token being used only for debugging).
202 struct tid_ampdu_rx
{
203 struct rcu_head rcu_head
;
204 spinlock_t reorder_lock
;
205 u64 reorder_buf_filtered
;
206 struct sk_buff_head
*reorder_buf
;
207 unsigned long *reorder_time
;
208 struct timer_list session_timer
;
209 struct timer_list reorder_timer
;
210 unsigned long last_rx
;
222 * struct sta_ampdu_mlme - STA aggregation information.
224 * @mtx: mutex to protect all TX data (except non-NULL assignments
225 * to tid_tx[idx], which are protected by the sta spinlock)
226 * tid_start_tx is also protected by sta->lock.
227 * @tid_rx: aggregation info for Rx per TID -- RCU protected
228 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
229 * RX timer expired until the work for it runs
230 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
231 * driver requested to close until the work for it runs
232 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
233 * @work: work struct for starting/stopping aggregation
234 * @tid_tx: aggregation info for Tx per TID
235 * @tid_start_tx: sessions where start was requested
236 * @last_addba_req_time: timestamp of the last addBA request.
237 * @addba_req_num: number of times addBA request has been sent.
238 * @dialog_token_allocator: dialog token enumerator for each new session;
240 struct sta_ampdu_mlme
{
243 struct tid_ampdu_rx __rcu
*tid_rx
[IEEE80211_NUM_TIDS
];
244 unsigned long tid_rx_timer_expired
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
245 unsigned long tid_rx_stop_requested
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
246 unsigned long agg_session_valid
[BITS_TO_LONGS(IEEE80211_NUM_TIDS
)];
248 struct work_struct work
;
249 struct tid_ampdu_tx __rcu
*tid_tx
[IEEE80211_NUM_TIDS
];
250 struct tid_ampdu_tx
*tid_start_tx
[IEEE80211_NUM_TIDS
];
251 unsigned long last_addba_req_time
[IEEE80211_NUM_TIDS
];
252 u8 addba_req_num
[IEEE80211_NUM_TIDS
];
253 u8 dialog_token_allocator
;
257 /* Value to indicate no TID reservation */
258 #define IEEE80211_TID_UNRESERVED 0xff
260 #define IEEE80211_FAST_XMIT_MAX_IV 18
263 * struct ieee80211_fast_tx - TX fastpath information
264 * @key: key to use for hw crypto
265 * @hdr: the 802.11 header to put with the frame
266 * @hdr_len: actual 802.11 header length
267 * @sa_offs: offset of the SA
268 * @da_offs: offset of the DA
269 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
270 * @band: band this will be transmitted on, for tx_info
271 * @rcu_head: RCU head to free this struct
273 * This struct is small enough so that the common case (maximum crypto
274 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
277 struct ieee80211_fast_tx
{
278 struct ieee80211_key
*key
;
280 u8 sa_offs
, da_offs
, pn_offs
;
282 u8 hdr
[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV
+
283 sizeof(rfc1042_header
)];
285 struct rcu_head rcu_head
;
289 * struct ieee80211_fast_rx - RX fastpath information
290 * @dev: netdevice for reporting the SKB
291 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
292 * @vif_addr: interface address
293 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
294 * @control_port_protocol: control port protocol copied from sdata
295 * @expected_ds_bits: from/to DS bits expected
296 * @icv_len: length of the MIC if present
297 * @key: bool indicating encryption is expected (key is set)
298 * @sta_notify: notify the MLME code (once)
299 * @internal_forward: forward froms internally on AP/VLAN type interfaces
300 * @uses_rss: copy of USES_RSS hw flag
301 * @da_offs: offset of the DA in the header (for header conversion)
302 * @sa_offs: offset of the SA in the header (for header conversion)
303 * @rcu_head: RCU head for freeing this structure
305 struct ieee80211_fast_rx
{
306 struct net_device
*dev
;
307 enum nl80211_iftype vif_type
;
308 u8 vif_addr
[ETH_ALEN
] __aligned(2);
309 u8 rfc1042_hdr
[6] __aligned(2);
310 __be16 control_port_protocol
;
311 __le16 expected_ds_bits
;
319 struct rcu_head rcu_head
;
323 * struct mesh_sta - mesh STA information
324 * @plink_lock: serialize access to plink fields
325 * @llid: Local link ID
326 * @plid: Peer link ID
327 * @aid: local aid supplied by peer
328 * @reason: Cancel reason on PLINK_HOLDING state
329 * @plink_retries: Retries in establishment
330 * @plink_state: peer link state
331 * @plink_timeout: timeout of peer link
332 * @plink_timer: peer link watch timer
333 * @t_offset: timing offset relative to this host
334 * @t_offset_setpoint: reference timing offset of this sta to be used when
335 * calculating clockdrift
336 * @local_pm: local link-specific power save mode
337 * @peer_pm: peer-specific power save mode towards local STA
338 * @nonpeer_pm: STA power save mode towards non-peer neighbors
339 * @processed_beacon: set to true after peer rates and capabilities are
341 * @fail_avg: moving percentage of failed MSDUs
344 struct timer_list plink_timer
;
347 s64 t_offset_setpoint
;
349 spinlock_t plink_lock
;
356 bool processed_beacon
;
358 enum nl80211_plink_state plink_state
;
361 /* mesh power save */
362 enum nl80211_mesh_power_mode local_pm
;
363 enum nl80211_mesh_power_mode peer_pm
;
364 enum nl80211_mesh_power_mode nonpeer_pm
;
366 /* moving percentage of failed MSDUs */
367 unsigned int fail_avg
;
370 DECLARE_EWMA(signal
, 1024, 8)
372 struct ieee80211_sta_rx_stats
{
373 unsigned long packets
;
374 unsigned long last_rx
;
375 unsigned long num_duplicates
;
376 unsigned long fragments
;
377 unsigned long dropped
;
380 s8 chain_signal_last
[IEEE80211_MAX_CHAINS
];
382 struct u64_stats_sync syncp
;
384 u64 msdu
[IEEE80211_NUM_TIDS
+ 1];
388 * struct sta_info - STA information
390 * This structure collects information about a station that
391 * mac80211 is communicating with.
393 * @list: global linked list entry
394 * @free_list: list entry for keeping track of stations to free
395 * @hash_node: hash node for rhashtable
396 * @addr: station's MAC address - duplicated from public part to
397 * let the hash table work with just a single cacheline
398 * @local: pointer to the global information
399 * @sdata: virtual interface this station belongs to
400 * @ptk: peer keys negotiated with this station, if any
401 * @ptk_idx: last installed peer key index
402 * @gtk: group keys negotiated with this station, if any
403 * @rate_ctrl: rate control algorithm reference
404 * @rate_ctrl_lock: spinlock used to protect rate control data
405 * (data inside the algorithm, so serializes calls there)
406 * @rate_ctrl_priv: rate control private per-STA pointer
407 * @lock: used for locking all fields that require locking, see comments
408 * in the header file.
409 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
410 * @listen_interval: listen interval of this station, when we're acting as AP
411 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
412 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
413 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
414 * when it leaves power saving state or polls
415 * @tx_filtered: buffers (per AC) of frames we already tried to
416 * transmit but were filtered by hardware due to STA having
417 * entered power saving state, these are also delivered to
418 * the station when it leaves powersave or polls for frames
419 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
420 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
421 * @last_connected: time (in seconds) when a station got connected
422 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
423 * plus one for non-QoS frames)
424 * @tid_seq: per-TID sequence numbers for sending to this STA
425 * @ampdu_mlme: A-MPDU state machine state
426 * @timer_to_tid: identity mapping to ID timers
427 * @mesh: mesh STA information
428 * @debugfs_dir: debug filesystem directory dentry
429 * @dead: set to true when sta is unlinked
430 * @removed: set to true when sta is being removed from sta_list
431 * @uploaded: set to true when sta is uploaded to the driver
432 * @sta: station information we share with the driver
433 * @sta_state: duplicates information about station state (for debug)
434 * @rcu_head: RCU head used for freeing this station struct
435 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
436 * taken from HT/VHT capabilities or VHT operating mode notification
437 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
439 * @cipher_scheme: optional cipher scheme for this station
440 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
441 * @fast_tx: TX fastpath information
442 * @fast_rx: RX fastpath information
443 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
445 * @tx_stats: TX statistics
446 * @rx_stats: RX statistics
447 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
448 * this (by advertising the USES_RSS hw flag)
449 * @status_stats: TX status statistics
452 /* General information, mostly static */
453 struct list_head list
, free_list
;
454 struct rcu_head rcu_head
;
455 struct rhash_head hash_node
;
457 struct ieee80211_local
*local
;
458 struct ieee80211_sub_if_data
*sdata
;
459 struct ieee80211_key __rcu
*gtk
[NUM_DEFAULT_KEYS
+ NUM_DEFAULT_MGMT_KEYS
];
460 struct ieee80211_key __rcu
*ptk
[NUM_DEFAULT_KEYS
];
462 struct rate_control_ref
*rate_ctrl
;
463 void *rate_ctrl_priv
;
464 spinlock_t rate_ctrl_lock
;
467 struct ieee80211_fast_tx __rcu
*fast_tx
;
468 struct ieee80211_fast_rx __rcu
*fast_rx
;
469 struct ieee80211_sta_rx_stats __percpu
*pcpu_rx_stats
;
471 #ifdef CONFIG_MAC80211_MESH
472 struct mesh_sta
*mesh
;
475 struct work_struct drv_deliver_wk
;
484 enum ieee80211_sta_state sta_state
;
486 /* use the accessors defined below */
487 unsigned long _flags
;
489 /* STA powersave lock and frame queues */
491 struct sk_buff_head ps_tx_buf
[IEEE80211_NUM_ACS
];
492 struct sk_buff_head tx_filtered
[IEEE80211_NUM_ACS
];
493 unsigned long driver_buffered_tids
;
494 unsigned long txq_buffered_tids
;
498 /* Updated from RX path only, no locking requirements */
499 struct ieee80211_sta_rx_stats rx_stats
;
501 struct ewma_signal signal
;
502 struct ewma_signal chain_signal
[IEEE80211_MAX_CHAINS
];
505 /* Plus 1 for non-QoS frames */
506 __le16 last_seq_ctrl
[IEEE80211_NUM_TIDS
+ 1];
508 /* Updated from TX status path only, no locking requirements */
510 unsigned long filtered
;
511 unsigned long retry_failed
, retry_count
;
512 unsigned int lost_packets
;
513 unsigned long last_tdls_pkt_time
;
514 u64 msdu_retries
[IEEE80211_NUM_TIDS
+ 1];
515 u64 msdu_failed
[IEEE80211_NUM_TIDS
+ 1];
516 unsigned long last_ack
;
519 /* Updated from TX path only, no locking requirements */
521 u64 packets
[IEEE80211_NUM_ACS
];
522 u64 bytes
[IEEE80211_NUM_ACS
];
523 struct ieee80211_tx_rate last_rate
;
524 u64 msdu
[IEEE80211_NUM_TIDS
+ 1];
526 u16 tid_seq
[IEEE80211_QOS_CTL_TID_MASK
+ 1];
529 * Aggregation information, locked with lock.
531 struct sta_ampdu_mlme ampdu_mlme
;
532 u8 timer_to_tid
[IEEE80211_NUM_TIDS
];
534 #ifdef CONFIG_MAC80211_DEBUGFS
535 struct dentry
*debugfs_dir
;
538 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth
;
540 enum ieee80211_smps_mode known_smps_mode
;
541 const struct ieee80211_cipher_scheme
*cipher_scheme
;
545 struct cfg80211_chan_def tdls_chandef
;
548 struct ieee80211_sta sta
;
551 static inline enum nl80211_plink_state
sta_plink_state(struct sta_info
*sta
)
553 #ifdef CONFIG_MAC80211_MESH
554 return sta
->mesh
->plink_state
;
556 return NL80211_PLINK_LISTEN
;
559 static inline void set_sta_flag(struct sta_info
*sta
,
560 enum ieee80211_sta_info_flags flag
)
562 WARN_ON(flag
== WLAN_STA_AUTH
||
563 flag
== WLAN_STA_ASSOC
||
564 flag
== WLAN_STA_AUTHORIZED
);
565 set_bit(flag
, &sta
->_flags
);
568 static inline void clear_sta_flag(struct sta_info
*sta
,
569 enum ieee80211_sta_info_flags flag
)
571 WARN_ON(flag
== WLAN_STA_AUTH
||
572 flag
== WLAN_STA_ASSOC
||
573 flag
== WLAN_STA_AUTHORIZED
);
574 clear_bit(flag
, &sta
->_flags
);
577 static inline int test_sta_flag(struct sta_info
*sta
,
578 enum ieee80211_sta_info_flags flag
)
580 return test_bit(flag
, &sta
->_flags
);
583 static inline int test_and_clear_sta_flag(struct sta_info
*sta
,
584 enum ieee80211_sta_info_flags flag
)
586 WARN_ON(flag
== WLAN_STA_AUTH
||
587 flag
== WLAN_STA_ASSOC
||
588 flag
== WLAN_STA_AUTHORIZED
);
589 return test_and_clear_bit(flag
, &sta
->_flags
);
592 static inline int test_and_set_sta_flag(struct sta_info
*sta
,
593 enum ieee80211_sta_info_flags flag
)
595 WARN_ON(flag
== WLAN_STA_AUTH
||
596 flag
== WLAN_STA_ASSOC
||
597 flag
== WLAN_STA_AUTHORIZED
);
598 return test_and_set_bit(flag
, &sta
->_flags
);
601 int sta_info_move_state(struct sta_info
*sta
,
602 enum ieee80211_sta_state new_state
);
604 static inline void sta_info_pre_move_state(struct sta_info
*sta
,
605 enum ieee80211_sta_state new_state
)
609 WARN_ON_ONCE(test_sta_flag(sta
, WLAN_STA_INSERTED
));
611 ret
= sta_info_move_state(sta
, new_state
);
616 void ieee80211_assign_tid_tx(struct sta_info
*sta
, int tid
,
617 struct tid_ampdu_tx
*tid_tx
);
619 static inline struct tid_ampdu_tx
*
620 rcu_dereference_protected_tid_tx(struct sta_info
*sta
, int tid
)
622 return rcu_dereference_protected(sta
->ampdu_mlme
.tid_tx
[tid
],
623 lockdep_is_held(&sta
->lock
) ||
624 lockdep_is_held(&sta
->ampdu_mlme
.mtx
));
627 /* Maximum number of frames to buffer per power saving station per AC */
628 #define STA_MAX_TX_BUFFER 64
630 /* Minimum buffered frame expiry time. If STA uses listen interval that is
631 * smaller than this value, the minimum value here is used instead. */
632 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
634 /* How often station data is cleaned up (e.g., expiration of buffered frames)
636 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
639 * Get a STA info, must be under RCU read lock.
641 struct sta_info
*sta_info_get(struct ieee80211_sub_if_data
*sdata
,
644 struct sta_info
*sta_info_get_bss(struct ieee80211_sub_if_data
*sdata
,
647 u32
sta_addr_hash(const void *key
, u32 length
, u32 seed
);
649 #define _sta_bucket_idx(_tbl, _a) \
650 rht_bucket_index(_tbl, sta_addr_hash(_a, ETH_ALEN, (_tbl)->hash_rnd))
652 #define for_each_sta_info(local, tbl, _addr, _sta, _tmp) \
653 rht_for_each_entry_rcu(_sta, _tmp, tbl, \
654 _sta_bucket_idx(tbl, _addr), \
656 /* compare address and run code only if it matches */ \
657 if (ether_addr_equal(_sta->addr, (_addr)))
660 * Get STA info by index, BROKEN!
662 struct sta_info
*sta_info_get_by_idx(struct ieee80211_sub_if_data
*sdata
,
665 * Create a new STA info, caller owns returned structure
666 * until sta_info_insert().
668 struct sta_info
*sta_info_alloc(struct ieee80211_sub_if_data
*sdata
,
669 const u8
*addr
, gfp_t gfp
);
671 void sta_info_free(struct ieee80211_local
*local
, struct sta_info
*sta
);
674 * Insert STA info into hash table/list, returns zero or a
675 * -EEXIST if (if the same MAC address is already present).
677 * Calling the non-rcu version makes the caller relinquish,
678 * the _rcu version calls read_lock_rcu() and must be called
681 int sta_info_insert(struct sta_info
*sta
);
682 int sta_info_insert_rcu(struct sta_info
*sta
) __acquires(RCU
);
684 int __must_check
__sta_info_destroy(struct sta_info
*sta
);
685 int sta_info_destroy_addr(struct ieee80211_sub_if_data
*sdata
,
687 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data
*sdata
,
690 void sta_info_recalc_tim(struct sta_info
*sta
);
692 int sta_info_init(struct ieee80211_local
*local
);
693 void sta_info_stop(struct ieee80211_local
*local
);
696 * sta_info_flush - flush matching STA entries from the STA table
698 * Returns the number of removed STA entries.
700 * @sdata: sdata to remove all stations from
701 * @vlans: if the given interface is an AP interface, also flush VLANs
703 int __sta_info_flush(struct ieee80211_sub_if_data
*sdata
, bool vlans
);
705 static inline int sta_info_flush(struct ieee80211_sub_if_data
*sdata
)
707 return __sta_info_flush(sdata
, false);
710 void sta_set_rate_info_tx(struct sta_info
*sta
,
711 const struct ieee80211_tx_rate
*rate
,
712 struct rate_info
*rinfo
);
713 void sta_set_sinfo(struct sta_info
*sta
, struct station_info
*sinfo
);
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 */