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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 | * | |
22 | * These flags are used with &struct sta_info's @flags member. | |
23 | * | |
24 | * @WLAN_STA_AUTH: Station is authenticated. | |
25 | * @WLAN_STA_ASSOC: Station is associated. | |
af818581 | 26 | * @WLAN_STA_PS_STA: Station is in power-save mode |
238814fd JB |
27 | * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. |
28 | * This bit is always checked so needs to be enabled for all stations | |
29 | * when virtual port control is not in use. | |
30 | * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble | |
31 | * frames. | |
32 | * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP. | |
33 | * @WLAN_STA_WME: Station is a QoS-STA. | |
34 | * @WLAN_STA_WDS: Station is one of our WDS peers. | |
d46e144b | 35 | * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the |
e039fa4a | 36 | * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next |
d46e144b | 37 | * frame to this station is transmitted. |
5394af4d | 38 | * @WLAN_STA_MFP: Management frame protection is used with this STA. |
618f356b | 39 | * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) |
098a6070 | 40 | * during suspend/resume and station removal. |
af818581 JB |
41 | * @WLAN_STA_PS_DRIVER: driver requires keeping this station in |
42 | * power-save mode logically to flush frames that might still | |
43 | * be in the queues | |
44 | * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping | |
45 | * station in power-save mode, reply when the driver unblocks. | |
dcf55fb5 FF |
46 | * @WLAN_STA_PS_DRIVER_BUF: Station has frames pending in driver internal |
47 | * buffers. Automatically cleared on station wake-up. | |
238814fd JB |
48 | */ |
49 | enum ieee80211_sta_info_flags { | |
50 | WLAN_STA_AUTH = 1<<0, | |
51 | WLAN_STA_ASSOC = 1<<1, | |
af818581 | 52 | WLAN_STA_PS_STA = 1<<2, |
836341a7 JB |
53 | WLAN_STA_AUTHORIZED = 1<<3, |
54 | WLAN_STA_SHORT_PREAMBLE = 1<<4, | |
55 | WLAN_STA_ASSOC_AP = 1<<5, | |
56 | WLAN_STA_WME = 1<<6, | |
57 | WLAN_STA_WDS = 1<<7, | |
d46e144b | 58 | WLAN_STA_CLEAR_PS_FILT = 1<<9, |
5394af4d | 59 | WLAN_STA_MFP = 1<<10, |
618f356b | 60 | WLAN_STA_BLOCK_BA = 1<<11, |
af818581 JB |
61 | WLAN_STA_PS_DRIVER = 1<<12, |
62 | WLAN_STA_PSPOLL = 1<<13, | |
dcf55fb5 | 63 | WLAN_STA_PS_DRIVER_BUF = 1<<14, |
238814fd | 64 | }; |
f0706e82 | 65 | |
5aae2880 RR |
66 | #define STA_TID_NUM 16 |
67 | #define ADDBA_RESP_INTERVAL HZ | |
a622ab72 | 68 | #define HT_AGG_MAX_RETRIES 0x3 |
5aae2880 | 69 | |
a622ab72 JB |
70 | #define HT_AGG_STATE_DRV_READY 0 |
71 | #define HT_AGG_STATE_RESPONSE_RECEIVED 1 | |
72 | #define HT_AGG_STATE_OPERATIONAL 2 | |
73 | #define HT_AGG_STATE_STOPPING 3 | |
0ab33703 JB |
74 | #define HT_AGG_STATE_WANT_START 4 |
75 | #define HT_AGG_STATE_WANT_STOP 5 | |
80656c20 RR |
76 | |
77 | /** | |
78 | * struct tid_ampdu_tx - TID aggregation information (Tx). | |
79 | * | |
a622ab72 | 80 | * @rcu_head: rcu head for freeing structure |
80656c20 | 81 | * @addba_resp_timer: timer for peer's response to addba request |
cd8ffc80 | 82 | * @pending: pending frames queue -- use sta's spinlock to protect |
cee24a3e | 83 | * @dialog_token: dialog token for aggregation session |
bd2ce6e4 | 84 | * @timeout: session timeout value to be filled in ADDBA requests |
a622ab72 JB |
85 | * @state: session state (see above) |
86 | * @stop_initiator: initiator of a session stop | |
53f73c09 | 87 | * @tx_stop: TX DelBA frame when stopping |
0b01f030 | 88 | * @buf_size: reorder buffer size at receiver |
a622ab72 | 89 | * |
dd318575 JB |
90 | * This structure's lifetime is managed by RCU, assignments to |
91 | * the array holding it must hold the aggregation mutex. | |
92 | * | |
93 | * The TX path can access it under RCU lock-free if, and | |
94 | * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL | |
95 | * set. Otherwise, the TX path must also acquire the spinlock | |
96 | * and re-check the state, see comments in the tx code | |
97 | * touching it. | |
80656c20 RR |
98 | */ |
99 | struct tid_ampdu_tx { | |
a622ab72 | 100 | struct rcu_head rcu_head; |
80656c20 | 101 | struct timer_list addba_resp_timer; |
cd8ffc80 | 102 | struct sk_buff_head pending; |
a622ab72 | 103 | unsigned long state; |
bd2ce6e4 | 104 | u16 timeout; |
cee24a3e | 105 | u8 dialog_token; |
a622ab72 | 106 | u8 stop_initiator; |
53f73c09 | 107 | bool tx_stop; |
0b01f030 | 108 | u8 buf_size; |
80656c20 | 109 | }; |
5aae2880 RR |
110 | |
111 | /** | |
112 | * struct tid_ampdu_rx - TID aggregation information (Rx). | |
113 | * | |
5aae2880 | 114 | * @reorder_buf: buffer to reorder incoming aggregated MPDUs |
4d050f1d | 115 | * @reorder_time: jiffies when skb was added |
5aae2880 | 116 | * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) |
2bff8ebf | 117 | * @reorder_timer: releases expired frames from the reorder buffer. |
056cdd59 JB |
118 | * @head_seq_num: head sequence number in reordering buffer. |
119 | * @stored_mpdu_num: number of MPDUs in reordering buffer | |
cee24a3e RR |
120 | * @ssn: Starting Sequence Number expected to be aggregated. |
121 | * @buf_size: buffer size for incoming A-MPDUs | |
20ad19d0 | 122 | * @timeout: reset timer value (in TUs). |
cee24a3e | 123 | * @dialog_token: dialog token for aggregation session |
a87f736d | 124 | * @rcu_head: RCU head used for freeing this struct |
2bff8ebf | 125 | * @reorder_lock: serializes access to reorder buffer, see below. |
a87f736d | 126 | * |
dd318575 JB |
127 | * This structure's lifetime is managed by RCU, assignments to |
128 | * the array holding it must hold the aggregation mutex. | |
2bff8ebf | 129 | * |
dd318575 JB |
130 | * The @reorder_lock is used to protect the members of this |
131 | * struct, except for @timeout, @buf_size and @dialog_token, | |
132 | * which are constant across the lifetime of the struct (the | |
133 | * dialog token being used only for debugging). | |
5aae2880 RR |
134 | */ |
135 | struct tid_ampdu_rx { | |
a87f736d | 136 | struct rcu_head rcu_head; |
2bff8ebf | 137 | spinlock_t reorder_lock; |
5aae2880 | 138 | struct sk_buff **reorder_buf; |
4d050f1d | 139 | unsigned long *reorder_time; |
5aae2880 | 140 | struct timer_list session_timer; |
2bff8ebf | 141 | struct timer_list reorder_timer; |
056cdd59 JB |
142 | u16 head_seq_num; |
143 | u16 stored_mpdu_num; | |
cee24a3e RR |
144 | u16 ssn; |
145 | u16 buf_size; | |
146 | u16 timeout; | |
147 | u8 dialog_token; | |
5aae2880 RR |
148 | }; |
149 | ||
fcea6007 JB |
150 | /** |
151 | * struct sta_ampdu_mlme - STA aggregation information. | |
152 | * | |
a87f736d | 153 | * @tid_rx: aggregation info for Rx per TID -- RCU protected |
fcea6007 | 154 | * @tid_tx: aggregation info for Tx per TID |
ec034b20 | 155 | * @tid_start_tx: sessions where start was requested |
fcea6007 JB |
156 | * @addba_req_num: number of times addBA request has been sent. |
157 | * @dialog_token_allocator: dialog token enumerator for each new session; | |
0ab33703 | 158 | * @work: work struct for starting/stopping aggregation |
7c3b1dd8 JB |
159 | * @tid_rx_timer_expired: bitmap indicating on which TIDs the |
160 | * RX timer expired until the work for it runs | |
f41ccd71 SL |
161 | * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the |
162 | * driver requested to close until the work for it runs | |
a93e3644 JB |
163 | * @mtx: mutex to protect all TX data (except non-NULL assignments |
164 | * to tid_tx[idx], which are protected by the sta spinlock) | |
fcea6007 JB |
165 | */ |
166 | struct sta_ampdu_mlme { | |
a93e3644 | 167 | struct mutex mtx; |
fcea6007 | 168 | /* rx */ |
40b275b6 | 169 | struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM]; |
7c3b1dd8 | 170 | unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)]; |
f41ccd71 | 171 | unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)]; |
fcea6007 | 172 | /* tx */ |
0ab33703 | 173 | struct work_struct work; |
40b275b6 | 174 | struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM]; |
ec034b20 | 175 | struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM]; |
fcea6007 JB |
176 | u8 addba_req_num[STA_TID_NUM]; |
177 | u8 dialog_token_allocator; | |
178 | }; | |
179 | ||
180 | ||
693b1bbc JB |
181 | /** |
182 | * struct sta_info - STA information | |
183 | * | |
184 | * This structure collects information about a station that | |
185 | * mac80211 is communicating with. | |
186 | * | |
187 | * @list: global linked list entry | |
188 | * @hnext: hash table linked list pointer | |
189 | * @local: pointer to the global information | |
e25cf4a6 | 190 | * @sdata: virtual interface this station belongs to |
e31b8213 JB |
191 | * @ptk: peer key negotiated with this station, if any |
192 | * @gtk: group keys negotiated with this station, if any | |
e25cf4a6 JB |
193 | * @rate_ctrl: rate control algorithm reference |
194 | * @rate_ctrl_priv: rate control private per-STA pointer | |
195 | * @last_tx_rate: rate used for last transmit, to report to userspace as | |
196 | * "the" transmit rate | |
3af6334c FF |
197 | * @last_rx_rate_idx: rx status rate index of the last data packet |
198 | * @last_rx_rate_flag: rx status flag of the last data packet | |
6ef307bc RD |
199 | * @lock: used for locking all fields that require locking, see comments |
200 | * in the header file. | |
201 | * @flaglock: spinlock for flags accesses | |
841507f5 | 202 | * @drv_unblock_wk: used for driver PS unblocking |
e25cf4a6 | 203 | * @listen_interval: listen interval of this station, when we're acting as AP |
693b1bbc JB |
204 | * @flags: STA flags, see &enum ieee80211_sta_info_flags |
205 | * @ps_tx_buf: buffer of frames to transmit to this station | |
206 | * when it leaves power saving state | |
207 | * @tx_filtered: buffer of frames we already tried to transmit | |
208 | * but were filtered by hardware due to STA having entered | |
209 | * power saving state | |
210 | * @rx_packets: Number of MSDUs received from this STA | |
211 | * @rx_bytes: Number of bytes received from this STA | |
e25cf4a6 JB |
212 | * @wep_weak_iv_count: number of weak WEP IVs received from this station |
213 | * @last_rx: time (in jiffies) when last frame was received from this STA | |
ebe27c91 | 214 | * @last_connected: time (in seconds) when a station got connected |
6ef307bc RD |
215 | * @num_duplicates: number of duplicate frames received from this STA |
216 | * @rx_fragments: number of received MPDUs | |
217 | * @rx_dropped: number of dropped MPDUs from this STA | |
218 | * @last_signal: signal of last received frame from this STA | |
541a45a1 | 219 | * @avg_signal: moving average of signal of received frames from this STA |
6ef307bc | 220 | * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) |
e25cf4a6 JB |
221 | * @tx_filtered_count: number of frames the hardware filtered for this STA |
222 | * @tx_retry_failed: number of frames that failed retry | |
223 | * @tx_retry_count: total number of retries for frames to this STA | |
6ef307bc RD |
224 | * @fail_avg: moving percentage of failed MSDUs |
225 | * @tx_packets: number of RX/TX MSDUs | |
e25cf4a6 | 226 | * @tx_bytes: number of bytes transmitted to this STA |
6ef307bc | 227 | * @tx_fragments: number of transmitted MPDUs |
e25cf4a6 JB |
228 | * @tid_seq: per-TID sequence numbers for sending to this STA |
229 | * @ampdu_mlme: A-MPDU state machine state | |
6ef307bc | 230 | * @timer_to_tid: identity mapping to ID timers |
6ef307bc RD |
231 | * @llid: Local link ID |
232 | * @plid: Peer link ID | |
233 | * @reason: Cancel reason on PLINK_HOLDING state | |
234 | * @plink_retries: Retries in establishment | |
e25cf4a6 JB |
235 | * @ignore_plink_timer: ignore the peer-link timer (used internally) |
236 | * @plink_state: peer link state | |
237 | * @plink_timeout: timeout of peer link | |
238 | * @plink_timer: peer link watch timer | |
cce4c77b | 239 | * @plink_timer_was_running: used by suspend/resume to restore timers |
6ef307bc | 240 | * @debugfs: debug filesystem info |
17741cdc | 241 | * @sta: station information we share with the driver |
af818581 | 242 | * @dead: set to true when sta is unlinked |
34e89507 | 243 | * @uploaded: set to true when sta is uploaded to the driver |
99ba2a14 | 244 | * @lost_packets: number of consecutive lost packets |
693b1bbc | 245 | */ |
f0706e82 | 246 | struct sta_info { |
693b1bbc | 247 | /* General information, mostly static */ |
f0706e82 | 248 | struct list_head list; |
40b275b6 | 249 | struct sta_info __rcu *hnext; |
f0706e82 | 250 | struct ieee80211_local *local; |
d0709a65 | 251 | struct ieee80211_sub_if_data *sdata; |
40b275b6 JB |
252 | struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; |
253 | struct ieee80211_key __rcu *ptk; | |
f0706e82 JB |
254 | struct rate_control_ref *rate_ctrl; |
255 | void *rate_ctrl_priv; | |
07346f81 | 256 | spinlock_t lock; |
5a9f7b04 | 257 | spinlock_t flaglock; |
17741cdc | 258 | |
af818581 JB |
259 | struct work_struct drv_unblock_wk; |
260 | ||
693b1bbc | 261 | u16 listen_interval; |
f0706e82 | 262 | |
af818581 JB |
263 | bool dead; |
264 | ||
34e89507 | 265 | bool uploaded; |
693b1bbc | 266 | |
5a9f7b04 JB |
267 | /* |
268 | * frequently updated, locked with own spinlock (flaglock), | |
269 | * use the accessors defined below | |
270 | */ | |
693b1bbc JB |
271 | u32 flags; |
272 | ||
273 | /* | |
274 | * STA powersave frame queues, no more than the internal | |
275 | * locking required. | |
276 | */ | |
277 | struct sk_buff_head ps_tx_buf; | |
278 | struct sk_buff_head tx_filtered; | |
279 | ||
280 | /* Updated from RX path only, no locking requirements */ | |
281 | unsigned long rx_packets, rx_bytes; | |
282 | unsigned long wep_weak_iv_count; | |
283 | unsigned long last_rx; | |
ebe27c91 | 284 | long last_connected; |
6ef307bc RD |
285 | unsigned long num_duplicates; |
286 | unsigned long rx_fragments; | |
287 | unsigned long rx_dropped; | |
288 | int last_signal; | |
541a45a1 | 289 | struct ewma avg_signal; |
693b1bbc | 290 | __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES]; |
693b1bbc JB |
291 | |
292 | /* Updated from TX status path only, no locking requirements */ | |
293 | unsigned long tx_filtered_count; | |
294 | unsigned long tx_retry_failed, tx_retry_count; | |
693b1bbc JB |
295 | /* moving percentage of failed MSDUs */ |
296 | unsigned int fail_avg; | |
297 | ||
298 | /* Updated from TX path only, no locking requirements */ | |
6ef307bc | 299 | unsigned long tx_packets; |
693b1bbc | 300 | unsigned long tx_bytes; |
6ef307bc | 301 | unsigned long tx_fragments; |
e6a9854b | 302 | struct ieee80211_tx_rate last_tx_rate; |
3af6334c FF |
303 | int last_rx_rate_idx; |
304 | int last_rx_rate_flag; | |
f591fa5d | 305 | u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; |
f0706e82 | 306 | |
d0709a65 | 307 | /* |
07346f81 | 308 | * Aggregation information, locked with lock. |
d0709a65 | 309 | */ |
5aae2880 | 310 | struct sta_ampdu_mlme ampdu_mlme; |
6ef307bc | 311 | u8 timer_to_tid[STA_TID_NUM]; |
693b1bbc | 312 | |
ee385855 | 313 | #ifdef CONFIG_MAC80211_MESH |
693b1bbc JB |
314 | /* |
315 | * Mesh peer link attributes | |
316 | * TODO: move to a sub-structure that is referenced with pointer? | |
317 | */ | |
6ef307bc RD |
318 | __le16 llid; |
319 | __le16 plid; | |
320 | __le16 reason; | |
321 | u8 plink_retries; | |
7495883b | 322 | bool ignore_plink_timer; |
5bb644a0 | 323 | bool plink_timer_was_running; |
57cf8043 | 324 | enum nl80211_plink_state plink_state; |
ee385855 LCC |
325 | u32 plink_timeout; |
326 | struct timer_list plink_timer; | |
ee385855 | 327 | #endif |
10816d40 | 328 | |
e9f207f0 JB |
329 | #ifdef CONFIG_MAC80211_DEBUGFS |
330 | struct sta_info_debugfsdentries { | |
331 | struct dentry *dir; | |
63044e9f | 332 | bool add_has_run; |
e9f207f0 JB |
333 | } debugfs; |
334 | #endif | |
17741cdc | 335 | |
99ba2a14 JB |
336 | unsigned int lost_packets; |
337 | ||
17741cdc JB |
338 | /* keep last! */ |
339 | struct ieee80211_sta sta; | |
f0706e82 JB |
340 | }; |
341 | ||
57cf8043 | 342 | static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) |
d6d1a5a7 JB |
343 | { |
344 | #ifdef CONFIG_MAC80211_MESH | |
345 | return sta->plink_state; | |
346 | #endif | |
57cf8043 | 347 | return NL80211_PLINK_LISTEN; |
d6d1a5a7 JB |
348 | } |
349 | ||
07346f81 JB |
350 | static inline void set_sta_flags(struct sta_info *sta, const u32 flags) |
351 | { | |
5a9f7b04 JB |
352 | unsigned long irqfl; |
353 | ||
354 | spin_lock_irqsave(&sta->flaglock, irqfl); | |
07346f81 | 355 | sta->flags |= flags; |
5a9f7b04 | 356 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
357 | } |
358 | ||
359 | static inline void clear_sta_flags(struct sta_info *sta, const u32 flags) | |
360 | { | |
5a9f7b04 JB |
361 | unsigned long irqfl; |
362 | ||
363 | spin_lock_irqsave(&sta->flaglock, irqfl); | |
07346f81 | 364 | sta->flags &= ~flags; |
5a9f7b04 | 365 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
366 | } |
367 | ||
07346f81 JB |
368 | static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags) |
369 | { | |
370 | u32 ret; | |
5a9f7b04 | 371 | unsigned long irqfl; |
07346f81 | 372 | |
5a9f7b04 | 373 | spin_lock_irqsave(&sta->flaglock, irqfl); |
07346f81 | 374 | ret = sta->flags & flags; |
5a9f7b04 | 375 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
376 | |
377 | return ret; | |
378 | } | |
379 | ||
380 | static inline u32 test_and_clear_sta_flags(struct sta_info *sta, | |
381 | const u32 flags) | |
382 | { | |
383 | u32 ret; | |
5a9f7b04 | 384 | unsigned long irqfl; |
07346f81 | 385 | |
5a9f7b04 | 386 | spin_lock_irqsave(&sta->flaglock, irqfl); |
07346f81 JB |
387 | ret = sta->flags & flags; |
388 | sta->flags &= ~flags; | |
5a9f7b04 | 389 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
390 | |
391 | return ret; | |
392 | } | |
393 | ||
394 | static inline u32 get_sta_flags(struct sta_info *sta) | |
395 | { | |
396 | u32 ret; | |
5a9f7b04 | 397 | unsigned long irqfl; |
07346f81 | 398 | |
5a9f7b04 | 399 | spin_lock_irqsave(&sta->flaglock, irqfl); |
07346f81 | 400 | ret = sta->flags; |
5a9f7b04 | 401 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
402 | |
403 | return ret; | |
404 | } | |
405 | ||
ec034b20 JB |
406 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
407 | struct tid_ampdu_tx *tid_tx); | |
f0706e82 | 408 | |
40b275b6 JB |
409 | static inline struct tid_ampdu_tx * |
410 | rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) | |
411 | { | |
412 | return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], | |
413 | lockdep_is_held(&sta->lock) || | |
414 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
415 | } | |
f0706e82 JB |
416 | |
417 | #define STA_HASH_SIZE 256 | |
418 | #define STA_HASH(sta) (sta[5]) | |
419 | ||
420 | ||
421 | /* Maximum number of frames to buffer per power saving station */ | |
422 | #define STA_MAX_TX_BUFFER 128 | |
423 | ||
424 | /* Minimum buffered frame expiry time. If STA uses listen interval that is | |
425 | * smaller than this value, the minimum value here is used instead. */ | |
426 | #define STA_TX_BUFFER_EXPIRE (10 * HZ) | |
427 | ||
428 | /* How often station data is cleaned up (e.g., expiration of buffered frames) | |
429 | */ | |
430 | #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) | |
431 | ||
d0709a65 | 432 | /* |
abe60632 | 433 | * Get a STA info, must be under RCU read lock. |
d0709a65 | 434 | */ |
abe60632 JB |
435 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
436 | const u8 *addr); | |
437 | ||
0e5ded5a FF |
438 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, |
439 | const u8 *addr); | |
440 | ||
abe60632 JB |
441 | static inline |
442 | void for_each_sta_info_type_check(struct ieee80211_local *local, | |
443 | const u8 *addr, | |
444 | struct sta_info *sta, | |
445 | struct sta_info *nxt) | |
446 | { | |
447 | } | |
448 | ||
38bdb650 | 449 | #define for_each_sta_info(local, _addr, _sta, nxt) \ |
abe60632 | 450 | for ( /* initialise loop */ \ |
38bdb650 FF |
451 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ |
452 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
abe60632 | 453 | /* typecheck */ \ |
38bdb650 | 454 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ |
abe60632 | 455 | /* continue condition */ \ |
38bdb650 | 456 | _sta; \ |
abe60632 | 457 | /* advance loop */ \ |
38bdb650 FF |
458 | _sta = nxt, \ |
459 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
abe60632 JB |
460 | ) \ |
461 | /* compare address and run code only if it matches */ \ | |
38bdb650 | 462 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0) |
abe60632 | 463 | |
d0709a65 JB |
464 | /* |
465 | * Get STA info by index, BROKEN! | |
466 | */ | |
3b53fde8 JB |
467 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
468 | int idx); | |
d0709a65 | 469 | /* |
73651ee6 JB |
470 | * Create a new STA info, caller owns returned structure |
471 | * until sta_info_insert(). | |
d0709a65 | 472 | */ |
73651ee6 JB |
473 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
474 | u8 *addr, gfp_t gfp); | |
475 | /* | |
476 | * Insert STA info into hash table/list, returns zero or a | |
477 | * -EEXIST if (if the same MAC address is already present). | |
478 | * | |
34e89507 JB |
479 | * Calling the non-rcu version makes the caller relinquish, |
480 | * the _rcu version calls read_lock_rcu() and must be called | |
481 | * without it held. | |
73651ee6 JB |
482 | */ |
483 | int sta_info_insert(struct sta_info *sta); | |
34e89507 JB |
484 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); |
485 | int sta_info_insert_atomic(struct sta_info *sta); | |
486 | ||
487 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, | |
488 | const u8 *addr); | |
489 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
490 | const u8 *addr); | |
f0706e82 | 491 | |
004c872e JB |
492 | void sta_info_set_tim_bit(struct sta_info *sta); |
493 | void sta_info_clear_tim_bit(struct sta_info *sta); | |
494 | ||
d0709a65 | 495 | void sta_info_init(struct ieee80211_local *local); |
d0709a65 | 496 | void sta_info_stop(struct ieee80211_local *local); |
44213b5e | 497 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 498 | struct ieee80211_sub_if_data *sdata); |
24723d1b JB |
499 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
500 | unsigned long exp_time); | |
d0709a65 | 501 | |
af818581 JB |
502 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); |
503 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); | |
504 | ||
f0706e82 | 505 | #endif /* STA_INFO_H */ |