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f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Devicescape Software, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
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> | |
af818581 | 15 | #include <linux/workqueue.h> |
541a45a1 | 16 | #include <linux/average.h> |
2c8dccc7 | 17 | #include "key.h" |
f0706e82 | 18 | |
238814fd JB |
19 | /** |
20 | * enum ieee80211_sta_info_flags - Stations flags | |
21 | * | |
c2c98fde JB |
22 | * These flags are used with &struct sta_info's @flags member, but |
23 | * only indirectly with set_sta_flag() and friends. | |
238814fd JB |
24 | * |
25 | * @WLAN_STA_AUTH: Station is authenticated. | |
26 | * @WLAN_STA_ASSOC: Station is associated. | |
af818581 | 27 | * @WLAN_STA_PS_STA: Station is in power-save mode |
238814fd JB |
28 | * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. |
29 | * This bit is always checked so needs to be enabled for all stations | |
30 | * when virtual port control is not in use. | |
31 | * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble | |
32 | * frames. | |
33 | * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP. | |
34 | * @WLAN_STA_WME: Station is a QoS-STA. | |
35 | * @WLAN_STA_WDS: Station is one of our WDS peers. | |
d46e144b | 36 | * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the |
e039fa4a | 37 | * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next |
d46e144b | 38 | * frame to this station is transmitted. |
5394af4d | 39 | * @WLAN_STA_MFP: Management frame protection is used with this STA. |
618f356b | 40 | * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) |
098a6070 | 41 | * during suspend/resume and station removal. |
af818581 JB |
42 | * @WLAN_STA_PS_DRIVER: driver requires keeping this station in |
43 | * power-save mode logically to flush frames that might still | |
44 | * be in the queues | |
45 | * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping | |
46 | * station in power-save mode, reply when the driver unblocks. | |
941c93cd AN |
47 | * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. |
48 | * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct | |
49 | * packets. This means the link is enabled. | |
47086fc5 JB |
50 | * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was |
51 | * keeping station in power-save mode, reply when the driver | |
52 | * unblocks the station. | |
53 | * @WLAN_STA_SP: Station is in a service period, so don't try to | |
deeaee19 | 54 | * reply to other uAPSD trigger frames or PS-Poll. |
238814fd JB |
55 | */ |
56 | enum ieee80211_sta_info_flags { | |
c2c98fde JB |
57 | WLAN_STA_AUTH, |
58 | WLAN_STA_ASSOC, | |
59 | WLAN_STA_PS_STA, | |
60 | WLAN_STA_AUTHORIZED, | |
61 | WLAN_STA_SHORT_PREAMBLE, | |
62 | WLAN_STA_ASSOC_AP, | |
63 | WLAN_STA_WME, | |
64 | WLAN_STA_WDS, | |
65 | WLAN_STA_CLEAR_PS_FILT, | |
66 | WLAN_STA_MFP, | |
67 | WLAN_STA_BLOCK_BA, | |
68 | WLAN_STA_PS_DRIVER, | |
69 | WLAN_STA_PSPOLL, | |
70 | WLAN_STA_TDLS_PEER, | |
71 | WLAN_STA_TDLS_PEER_AUTH, | |
72 | WLAN_STA_UAPSD, | |
73 | WLAN_STA_SP, | |
238814fd | 74 | }; |
f0706e82 | 75 | |
5aae2880 RR |
76 | #define STA_TID_NUM 16 |
77 | #define ADDBA_RESP_INTERVAL HZ | |
a622ab72 | 78 | #define HT_AGG_MAX_RETRIES 0x3 |
5aae2880 | 79 | |
a622ab72 JB |
80 | #define HT_AGG_STATE_DRV_READY 0 |
81 | #define HT_AGG_STATE_RESPONSE_RECEIVED 1 | |
82 | #define HT_AGG_STATE_OPERATIONAL 2 | |
83 | #define HT_AGG_STATE_STOPPING 3 | |
0ab33703 JB |
84 | #define HT_AGG_STATE_WANT_START 4 |
85 | #define HT_AGG_STATE_WANT_STOP 5 | |
80656c20 RR |
86 | |
87 | /** | |
88 | * struct tid_ampdu_tx - TID aggregation information (Tx). | |
89 | * | |
a622ab72 | 90 | * @rcu_head: rcu head for freeing structure |
80656c20 | 91 | * @addba_resp_timer: timer for peer's response to addba request |
cd8ffc80 | 92 | * @pending: pending frames queue -- use sta's spinlock to protect |
cee24a3e | 93 | * @dialog_token: dialog token for aggregation session |
bd2ce6e4 | 94 | * @timeout: session timeout value to be filled in ADDBA requests |
a622ab72 JB |
95 | * @state: session state (see above) |
96 | * @stop_initiator: initiator of a session stop | |
53f73c09 | 97 | * @tx_stop: TX DelBA frame when stopping |
0b01f030 | 98 | * @buf_size: reorder buffer size at receiver |
f0425bed FF |
99 | * @failed_bar_ssn: ssn of the last failed BAR tx attempt |
100 | * @bar_pending: BAR needs to be re-sent | |
a622ab72 | 101 | * |
dd318575 JB |
102 | * This structure's lifetime is managed by RCU, assignments to |
103 | * the array holding it must hold the aggregation mutex. | |
104 | * | |
105 | * The TX path can access it under RCU lock-free if, and | |
106 | * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL | |
107 | * set. Otherwise, the TX path must also acquire the spinlock | |
108 | * and re-check the state, see comments in the tx code | |
109 | * touching it. | |
80656c20 RR |
110 | */ |
111 | struct tid_ampdu_tx { | |
a622ab72 | 112 | struct rcu_head rcu_head; |
80656c20 | 113 | struct timer_list addba_resp_timer; |
cd8ffc80 | 114 | struct sk_buff_head pending; |
a622ab72 | 115 | unsigned long state; |
bd2ce6e4 | 116 | u16 timeout; |
cee24a3e | 117 | u8 dialog_token; |
a622ab72 | 118 | u8 stop_initiator; |
53f73c09 | 119 | bool tx_stop; |
0b01f030 | 120 | u8 buf_size; |
f0425bed FF |
121 | |
122 | u16 failed_bar_ssn; | |
123 | bool bar_pending; | |
80656c20 | 124 | }; |
5aae2880 RR |
125 | |
126 | /** | |
127 | * struct tid_ampdu_rx - TID aggregation information (Rx). | |
128 | * | |
5aae2880 | 129 | * @reorder_buf: buffer to reorder incoming aggregated MPDUs |
4d050f1d | 130 | * @reorder_time: jiffies when skb was added |
5aae2880 | 131 | * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) |
2bff8ebf | 132 | * @reorder_timer: releases expired frames from the reorder buffer. |
056cdd59 JB |
133 | * @head_seq_num: head sequence number in reordering buffer. |
134 | * @stored_mpdu_num: number of MPDUs in reordering buffer | |
cee24a3e RR |
135 | * @ssn: Starting Sequence Number expected to be aggregated. |
136 | * @buf_size: buffer size for incoming A-MPDUs | |
20ad19d0 | 137 | * @timeout: reset timer value (in TUs). |
cee24a3e | 138 | * @dialog_token: dialog token for aggregation session |
a87f736d | 139 | * @rcu_head: RCU head used for freeing this struct |
2bff8ebf | 140 | * @reorder_lock: serializes access to reorder buffer, see below. |
a87f736d | 141 | * |
dd318575 JB |
142 | * This structure's lifetime is managed by RCU, assignments to |
143 | * the array holding it must hold the aggregation mutex. | |
2bff8ebf | 144 | * |
dd318575 JB |
145 | * The @reorder_lock is used to protect the members of this |
146 | * struct, except for @timeout, @buf_size and @dialog_token, | |
147 | * which are constant across the lifetime of the struct (the | |
148 | * dialog token being used only for debugging). | |
5aae2880 RR |
149 | */ |
150 | struct tid_ampdu_rx { | |
a87f736d | 151 | struct rcu_head rcu_head; |
2bff8ebf | 152 | spinlock_t reorder_lock; |
5aae2880 | 153 | struct sk_buff **reorder_buf; |
4d050f1d | 154 | unsigned long *reorder_time; |
5aae2880 | 155 | struct timer_list session_timer; |
2bff8ebf | 156 | struct timer_list reorder_timer; |
056cdd59 JB |
157 | u16 head_seq_num; |
158 | u16 stored_mpdu_num; | |
cee24a3e RR |
159 | u16 ssn; |
160 | u16 buf_size; | |
161 | u16 timeout; | |
162 | u8 dialog_token; | |
5aae2880 RR |
163 | }; |
164 | ||
fcea6007 JB |
165 | /** |
166 | * struct sta_ampdu_mlme - STA aggregation information. | |
167 | * | |
a87f736d | 168 | * @tid_rx: aggregation info for Rx per TID -- RCU protected |
fcea6007 | 169 | * @tid_tx: aggregation info for Tx per TID |
ec034b20 | 170 | * @tid_start_tx: sessions where start was requested |
fcea6007 JB |
171 | * @addba_req_num: number of times addBA request has been sent. |
172 | * @dialog_token_allocator: dialog token enumerator for each new session; | |
0ab33703 | 173 | * @work: work struct for starting/stopping aggregation |
7c3b1dd8 JB |
174 | * @tid_rx_timer_expired: bitmap indicating on which TIDs the |
175 | * RX timer expired until the work for it runs | |
f41ccd71 SL |
176 | * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the |
177 | * driver requested to close until the work for it runs | |
a93e3644 JB |
178 | * @mtx: mutex to protect all TX data (except non-NULL assignments |
179 | * to tid_tx[idx], which are protected by the sta spinlock) | |
fcea6007 JB |
180 | */ |
181 | struct sta_ampdu_mlme { | |
a93e3644 | 182 | struct mutex mtx; |
fcea6007 | 183 | /* rx */ |
40b275b6 | 184 | struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM]; |
7c3b1dd8 | 185 | unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)]; |
f41ccd71 | 186 | unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)]; |
fcea6007 | 187 | /* tx */ |
0ab33703 | 188 | struct work_struct work; |
40b275b6 | 189 | struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM]; |
ec034b20 | 190 | struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM]; |
fcea6007 JB |
191 | u8 addba_req_num[STA_TID_NUM]; |
192 | u8 dialog_token_allocator; | |
193 | }; | |
194 | ||
195 | ||
693b1bbc JB |
196 | /** |
197 | * struct sta_info - STA information | |
198 | * | |
199 | * This structure collects information about a station that | |
200 | * mac80211 is communicating with. | |
201 | * | |
202 | * @list: global linked list entry | |
203 | * @hnext: hash table linked list pointer | |
204 | * @local: pointer to the global information | |
e25cf4a6 | 205 | * @sdata: virtual interface this station belongs to |
e31b8213 JB |
206 | * @ptk: peer key negotiated with this station, if any |
207 | * @gtk: group keys negotiated with this station, if any | |
e25cf4a6 JB |
208 | * @rate_ctrl: rate control algorithm reference |
209 | * @rate_ctrl_priv: rate control private per-STA pointer | |
210 | * @last_tx_rate: rate used for last transmit, to report to userspace as | |
211 | * "the" transmit rate | |
3af6334c FF |
212 | * @last_rx_rate_idx: rx status rate index of the last data packet |
213 | * @last_rx_rate_flag: rx status flag of the last data packet | |
6ef307bc RD |
214 | * @lock: used for locking all fields that require locking, see comments |
215 | * in the header file. | |
841507f5 | 216 | * @drv_unblock_wk: used for driver PS unblocking |
e25cf4a6 | 217 | * @listen_interval: listen interval of this station, when we're acting as AP |
c2c98fde | 218 | * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly |
948d887d JB |
219 | * @ps_tx_buf: buffers (per AC) of frames to transmit to this station |
220 | * when it leaves power saving state or polls | |
221 | * @tx_filtered: buffers (per AC) of frames we already tried to | |
222 | * transmit but were filtered by hardware due to STA having | |
223 | * entered power saving state, these are also delivered to | |
224 | * the station when it leaves powersave or polls for frames | |
225 | * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on | |
693b1bbc JB |
226 | * @rx_packets: Number of MSDUs received from this STA |
227 | * @rx_bytes: Number of bytes received from this STA | |
e25cf4a6 JB |
228 | * @wep_weak_iv_count: number of weak WEP IVs received from this station |
229 | * @last_rx: time (in jiffies) when last frame was received from this STA | |
ebe27c91 | 230 | * @last_connected: time (in seconds) when a station got connected |
6ef307bc RD |
231 | * @num_duplicates: number of duplicate frames received from this STA |
232 | * @rx_fragments: number of received MPDUs | |
233 | * @rx_dropped: number of dropped MPDUs from this STA | |
234 | * @last_signal: signal of last received frame from this STA | |
541a45a1 | 235 | * @avg_signal: moving average of signal of received frames from this STA |
6ef307bc | 236 | * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) |
e25cf4a6 JB |
237 | * @tx_filtered_count: number of frames the hardware filtered for this STA |
238 | * @tx_retry_failed: number of frames that failed retry | |
239 | * @tx_retry_count: total number of retries for frames to this STA | |
6ef307bc RD |
240 | * @fail_avg: moving percentage of failed MSDUs |
241 | * @tx_packets: number of RX/TX MSDUs | |
e25cf4a6 | 242 | * @tx_bytes: number of bytes transmitted to this STA |
6ef307bc | 243 | * @tx_fragments: number of transmitted MPDUs |
e25cf4a6 JB |
244 | * @tid_seq: per-TID sequence numbers for sending to this STA |
245 | * @ampdu_mlme: A-MPDU state machine state | |
6ef307bc | 246 | * @timer_to_tid: identity mapping to ID timers |
6ef307bc RD |
247 | * @llid: Local link ID |
248 | * @plid: Peer link ID | |
249 | * @reason: Cancel reason on PLINK_HOLDING state | |
250 | * @plink_retries: Retries in establishment | |
e25cf4a6 JB |
251 | * @ignore_plink_timer: ignore the peer-link timer (used internally) |
252 | * @plink_state: peer link state | |
253 | * @plink_timeout: timeout of peer link | |
254 | * @plink_timer: peer link watch timer | |
cce4c77b | 255 | * @plink_timer_was_running: used by suspend/resume to restore timers |
6ef307bc | 256 | * @debugfs: debug filesystem info |
af818581 | 257 | * @dead: set to true when sta is unlinked |
34e89507 | 258 | * @uploaded: set to true when sta is uploaded to the driver |
99ba2a14 | 259 | * @lost_packets: number of consecutive lost packets |
2a33bee2 GE |
260 | * @dummy: indicate a dummy station created for receiving |
261 | * EAP frames before association | |
262 | * @sta: station information we share with the driver | |
693b1bbc | 263 | */ |
f0706e82 | 264 | struct sta_info { |
693b1bbc | 265 | /* General information, mostly static */ |
f0706e82 | 266 | struct list_head list; |
40b275b6 | 267 | struct sta_info __rcu *hnext; |
f0706e82 | 268 | struct ieee80211_local *local; |
d0709a65 | 269 | struct ieee80211_sub_if_data *sdata; |
40b275b6 JB |
270 | struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; |
271 | struct ieee80211_key __rcu *ptk; | |
f0706e82 JB |
272 | struct rate_control_ref *rate_ctrl; |
273 | void *rate_ctrl_priv; | |
07346f81 | 274 | spinlock_t lock; |
17741cdc | 275 | |
af818581 JB |
276 | struct work_struct drv_unblock_wk; |
277 | ||
693b1bbc | 278 | u16 listen_interval; |
f0706e82 | 279 | |
af818581 JB |
280 | bool dead; |
281 | ||
34e89507 | 282 | bool uploaded; |
693b1bbc | 283 | |
c2c98fde JB |
284 | /* use the accessors defined below */ |
285 | unsigned long _flags; | |
693b1bbc JB |
286 | |
287 | /* | |
288 | * STA powersave frame queues, no more than the internal | |
289 | * locking required. | |
290 | */ | |
948d887d JB |
291 | struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; |
292 | struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; | |
293 | unsigned long driver_buffered_tids; | |
693b1bbc JB |
294 | |
295 | /* Updated from RX path only, no locking requirements */ | |
296 | unsigned long rx_packets, rx_bytes; | |
297 | unsigned long wep_weak_iv_count; | |
298 | unsigned long last_rx; | |
ebe27c91 | 299 | long last_connected; |
6ef307bc RD |
300 | unsigned long num_duplicates; |
301 | unsigned long rx_fragments; | |
302 | unsigned long rx_dropped; | |
303 | int last_signal; | |
541a45a1 | 304 | struct ewma avg_signal; |
9e26297a JB |
305 | /* Plus 1 for non-QoS frames */ |
306 | __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1]; | |
693b1bbc JB |
307 | |
308 | /* Updated from TX status path only, no locking requirements */ | |
309 | unsigned long tx_filtered_count; | |
310 | unsigned long tx_retry_failed, tx_retry_count; | |
693b1bbc JB |
311 | /* moving percentage of failed MSDUs */ |
312 | unsigned int fail_avg; | |
313 | ||
314 | /* Updated from TX path only, no locking requirements */ | |
6ef307bc | 315 | unsigned long tx_packets; |
693b1bbc | 316 | unsigned long tx_bytes; |
6ef307bc | 317 | unsigned long tx_fragments; |
e6a9854b | 318 | struct ieee80211_tx_rate last_tx_rate; |
3af6334c FF |
319 | int last_rx_rate_idx; |
320 | int last_rx_rate_flag; | |
f591fa5d | 321 | u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; |
f0706e82 | 322 | |
d0709a65 | 323 | /* |
07346f81 | 324 | * Aggregation information, locked with lock. |
d0709a65 | 325 | */ |
5aae2880 | 326 | struct sta_ampdu_mlme ampdu_mlme; |
6ef307bc | 327 | u8 timer_to_tid[STA_TID_NUM]; |
693b1bbc | 328 | |
ee385855 | 329 | #ifdef CONFIG_MAC80211_MESH |
693b1bbc JB |
330 | /* |
331 | * Mesh peer link attributes | |
332 | * TODO: move to a sub-structure that is referenced with pointer? | |
333 | */ | |
6ef307bc RD |
334 | __le16 llid; |
335 | __le16 plid; | |
336 | __le16 reason; | |
337 | u8 plink_retries; | |
7495883b | 338 | bool ignore_plink_timer; |
5bb644a0 | 339 | bool plink_timer_was_running; |
57cf8043 | 340 | enum nl80211_plink_state plink_state; |
ee385855 LCC |
341 | u32 plink_timeout; |
342 | struct timer_list plink_timer; | |
ee385855 | 343 | #endif |
10816d40 | 344 | |
e9f207f0 JB |
345 | #ifdef CONFIG_MAC80211_DEBUGFS |
346 | struct sta_info_debugfsdentries { | |
347 | struct dentry *dir; | |
63044e9f | 348 | bool add_has_run; |
e9f207f0 JB |
349 | } debugfs; |
350 | #endif | |
17741cdc | 351 | |
99ba2a14 JB |
352 | unsigned int lost_packets; |
353 | ||
2a33bee2 GE |
354 | /* should be right in front of sta to be in the same cache line */ |
355 | bool dummy; | |
356 | ||
17741cdc JB |
357 | /* keep last! */ |
358 | struct ieee80211_sta sta; | |
f0706e82 JB |
359 | }; |
360 | ||
57cf8043 | 361 | static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) |
d6d1a5a7 JB |
362 | { |
363 | #ifdef CONFIG_MAC80211_MESH | |
364 | return sta->plink_state; | |
365 | #endif | |
57cf8043 | 366 | return NL80211_PLINK_LISTEN; |
d6d1a5a7 JB |
367 | } |
368 | ||
c2c98fde JB |
369 | static inline void set_sta_flag(struct sta_info *sta, |
370 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 371 | { |
c2c98fde | 372 | set_bit(flag, &sta->_flags); |
07346f81 JB |
373 | } |
374 | ||
c2c98fde JB |
375 | static inline void clear_sta_flag(struct sta_info *sta, |
376 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 377 | { |
c2c98fde | 378 | clear_bit(flag, &sta->_flags); |
07346f81 JB |
379 | } |
380 | ||
c2c98fde JB |
381 | static inline int test_sta_flag(struct sta_info *sta, |
382 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 383 | { |
c2c98fde | 384 | return test_bit(flag, &sta->_flags); |
07346f81 JB |
385 | } |
386 | ||
c2c98fde JB |
387 | static inline int test_and_clear_sta_flag(struct sta_info *sta, |
388 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 389 | { |
c2c98fde | 390 | return test_and_clear_bit(flag, &sta->_flags); |
07346f81 JB |
391 | } |
392 | ||
ec034b20 JB |
393 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
394 | struct tid_ampdu_tx *tid_tx); | |
f0706e82 | 395 | |
40b275b6 JB |
396 | static inline struct tid_ampdu_tx * |
397 | rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) | |
398 | { | |
399 | return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], | |
400 | lockdep_is_held(&sta->lock) || | |
401 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
402 | } | |
f0706e82 JB |
403 | |
404 | #define STA_HASH_SIZE 256 | |
405 | #define STA_HASH(sta) (sta[5]) | |
406 | ||
407 | ||
948d887d JB |
408 | /* Maximum number of frames to buffer per power saving station per AC */ |
409 | #define STA_MAX_TX_BUFFER 64 | |
f0706e82 JB |
410 | |
411 | /* Minimum buffered frame expiry time. If STA uses listen interval that is | |
412 | * smaller than this value, the minimum value here is used instead. */ | |
413 | #define STA_TX_BUFFER_EXPIRE (10 * HZ) | |
414 | ||
415 | /* How often station data is cleaned up (e.g., expiration of buffered frames) | |
416 | */ | |
417 | #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) | |
418 | ||
d0709a65 | 419 | /* |
abe60632 | 420 | * Get a STA info, must be under RCU read lock. |
d0709a65 | 421 | */ |
abe60632 JB |
422 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
423 | const u8 *addr); | |
424 | ||
2a33bee2 GE |
425 | struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, |
426 | const u8 *addr); | |
427 | ||
0e5ded5a FF |
428 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, |
429 | const u8 *addr); | |
430 | ||
2a33bee2 GE |
431 | struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, |
432 | const u8 *addr); | |
433 | ||
abe60632 JB |
434 | static inline |
435 | void for_each_sta_info_type_check(struct ieee80211_local *local, | |
436 | const u8 *addr, | |
437 | struct sta_info *sta, | |
438 | struct sta_info *nxt) | |
439 | { | |
440 | } | |
441 | ||
38bdb650 | 442 | #define for_each_sta_info(local, _addr, _sta, nxt) \ |
2a33bee2 GE |
443 | for ( /* initialise loop */ \ |
444 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ | |
445 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
446 | /* typecheck */ \ | |
447 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ | |
448 | /* continue condition */ \ | |
449 | _sta; \ | |
450 | /* advance loop */ \ | |
451 | _sta = nxt, \ | |
452 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
453 | ) \ | |
454 | /* run code only if address matches and it's not a dummy sta */ \ | |
455 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \ | |
456 | !_sta->dummy) | |
457 | ||
458 | #define for_each_sta_info_rx(local, _addr, _sta, nxt) \ | |
abe60632 | 459 | for ( /* initialise loop */ \ |
38bdb650 FF |
460 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ |
461 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
abe60632 | 462 | /* typecheck */ \ |
38bdb650 | 463 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ |
abe60632 | 464 | /* continue condition */ \ |
38bdb650 | 465 | _sta; \ |
abe60632 | 466 | /* advance loop */ \ |
38bdb650 FF |
467 | _sta = nxt, \ |
468 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
abe60632 JB |
469 | ) \ |
470 | /* compare address and run code only if it matches */ \ | |
38bdb650 | 471 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0) |
abe60632 | 472 | |
d0709a65 JB |
473 | /* |
474 | * Get STA info by index, BROKEN! | |
475 | */ | |
3b53fde8 JB |
476 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
477 | int idx); | |
d0709a65 | 478 | /* |
73651ee6 JB |
479 | * Create a new STA info, caller owns returned structure |
480 | * until sta_info_insert(). | |
d0709a65 | 481 | */ |
73651ee6 JB |
482 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
483 | u8 *addr, gfp_t gfp); | |
484 | /* | |
485 | * Insert STA info into hash table/list, returns zero or a | |
486 | * -EEXIST if (if the same MAC address is already present). | |
487 | * | |
34e89507 JB |
488 | * Calling the non-rcu version makes the caller relinquish, |
489 | * the _rcu version calls read_lock_rcu() and must be called | |
490 | * without it held. | |
73651ee6 JB |
491 | */ |
492 | int sta_info_insert(struct sta_info *sta); | |
34e89507 JB |
493 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); |
494 | int sta_info_insert_atomic(struct sta_info *sta); | |
2a33bee2 | 495 | int sta_info_reinsert(struct sta_info *sta); |
34e89507 JB |
496 | |
497 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, | |
498 | const u8 *addr); | |
499 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
500 | const u8 *addr); | |
f0706e82 | 501 | |
c868cb35 | 502 | void sta_info_recalc_tim(struct sta_info *sta); |
004c872e | 503 | |
d0709a65 | 504 | void sta_info_init(struct ieee80211_local *local); |
d0709a65 | 505 | void sta_info_stop(struct ieee80211_local *local); |
44213b5e | 506 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 507 | struct ieee80211_sub_if_data *sdata); |
24723d1b JB |
508 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
509 | unsigned long exp_time); | |
d0709a65 | 510 | |
af818581 JB |
511 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); |
512 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); | |
47086fc5 | 513 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); |
af818581 | 514 | |
f0706e82 | 515 | #endif /* STA_INFO_H */ |