Commit | Line | Data |
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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. | |
941c93cd AN |
48 | * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. |
49 | * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct | |
50 | * packets. This means the link is enabled. | |
238814fd JB |
51 | */ |
52 | enum ieee80211_sta_info_flags { | |
53 | WLAN_STA_AUTH = 1<<0, | |
54 | WLAN_STA_ASSOC = 1<<1, | |
af818581 | 55 | WLAN_STA_PS_STA = 1<<2, |
836341a7 JB |
56 | WLAN_STA_AUTHORIZED = 1<<3, |
57 | WLAN_STA_SHORT_PREAMBLE = 1<<4, | |
58 | WLAN_STA_ASSOC_AP = 1<<5, | |
59 | WLAN_STA_WME = 1<<6, | |
60 | WLAN_STA_WDS = 1<<7, | |
d46e144b | 61 | WLAN_STA_CLEAR_PS_FILT = 1<<9, |
5394af4d | 62 | WLAN_STA_MFP = 1<<10, |
618f356b | 63 | WLAN_STA_BLOCK_BA = 1<<11, |
af818581 JB |
64 | WLAN_STA_PS_DRIVER = 1<<12, |
65 | WLAN_STA_PSPOLL = 1<<13, | |
dcf55fb5 | 66 | WLAN_STA_PS_DRIVER_BUF = 1<<14, |
07ba55d7 | 67 | WLAN_STA_TDLS_PEER = 1<<15, |
941c93cd | 68 | WLAN_STA_TDLS_PEER_AUTH = 1<<16, |
238814fd | 69 | }; |
f0706e82 | 70 | |
5aae2880 RR |
71 | #define STA_TID_NUM 16 |
72 | #define ADDBA_RESP_INTERVAL HZ | |
a622ab72 | 73 | #define HT_AGG_MAX_RETRIES 0x3 |
5aae2880 | 74 | |
a622ab72 JB |
75 | #define HT_AGG_STATE_DRV_READY 0 |
76 | #define HT_AGG_STATE_RESPONSE_RECEIVED 1 | |
77 | #define HT_AGG_STATE_OPERATIONAL 2 | |
78 | #define HT_AGG_STATE_STOPPING 3 | |
0ab33703 JB |
79 | #define HT_AGG_STATE_WANT_START 4 |
80 | #define HT_AGG_STATE_WANT_STOP 5 | |
80656c20 RR |
81 | |
82 | /** | |
83 | * struct tid_ampdu_tx - TID aggregation information (Tx). | |
84 | * | |
a622ab72 | 85 | * @rcu_head: rcu head for freeing structure |
80656c20 | 86 | * @addba_resp_timer: timer for peer's response to addba request |
cd8ffc80 | 87 | * @pending: pending frames queue -- use sta's spinlock to protect |
cee24a3e | 88 | * @dialog_token: dialog token for aggregation session |
bd2ce6e4 | 89 | * @timeout: session timeout value to be filled in ADDBA requests |
a622ab72 JB |
90 | * @state: session state (see above) |
91 | * @stop_initiator: initiator of a session stop | |
53f73c09 | 92 | * @tx_stop: TX DelBA frame when stopping |
0b01f030 | 93 | * @buf_size: reorder buffer size at receiver |
f0425bed FF |
94 | * @failed_bar_ssn: ssn of the last failed BAR tx attempt |
95 | * @bar_pending: BAR needs to be re-sent | |
a622ab72 | 96 | * |
dd318575 JB |
97 | * This structure's lifetime is managed by RCU, assignments to |
98 | * the array holding it must hold the aggregation mutex. | |
99 | * | |
100 | * The TX path can access it under RCU lock-free if, and | |
101 | * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL | |
102 | * set. Otherwise, the TX path must also acquire the spinlock | |
103 | * and re-check the state, see comments in the tx code | |
104 | * touching it. | |
80656c20 RR |
105 | */ |
106 | struct tid_ampdu_tx { | |
a622ab72 | 107 | struct rcu_head rcu_head; |
80656c20 | 108 | struct timer_list addba_resp_timer; |
cd8ffc80 | 109 | struct sk_buff_head pending; |
a622ab72 | 110 | unsigned long state; |
bd2ce6e4 | 111 | u16 timeout; |
cee24a3e | 112 | u8 dialog_token; |
a622ab72 | 113 | u8 stop_initiator; |
53f73c09 | 114 | bool tx_stop; |
0b01f030 | 115 | u8 buf_size; |
f0425bed FF |
116 | |
117 | u16 failed_bar_ssn; | |
118 | bool bar_pending; | |
80656c20 | 119 | }; |
5aae2880 RR |
120 | |
121 | /** | |
122 | * struct tid_ampdu_rx - TID aggregation information (Rx). | |
123 | * | |
5aae2880 | 124 | * @reorder_buf: buffer to reorder incoming aggregated MPDUs |
4d050f1d | 125 | * @reorder_time: jiffies when skb was added |
5aae2880 | 126 | * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) |
2bff8ebf | 127 | * @reorder_timer: releases expired frames from the reorder buffer. |
056cdd59 JB |
128 | * @head_seq_num: head sequence number in reordering buffer. |
129 | * @stored_mpdu_num: number of MPDUs in reordering buffer | |
cee24a3e RR |
130 | * @ssn: Starting Sequence Number expected to be aggregated. |
131 | * @buf_size: buffer size for incoming A-MPDUs | |
20ad19d0 | 132 | * @timeout: reset timer value (in TUs). |
cee24a3e | 133 | * @dialog_token: dialog token for aggregation session |
a87f736d | 134 | * @rcu_head: RCU head used for freeing this struct |
2bff8ebf | 135 | * @reorder_lock: serializes access to reorder buffer, see below. |
a87f736d | 136 | * |
dd318575 JB |
137 | * This structure's lifetime is managed by RCU, assignments to |
138 | * the array holding it must hold the aggregation mutex. | |
2bff8ebf | 139 | * |
dd318575 JB |
140 | * The @reorder_lock is used to protect the members of this |
141 | * struct, except for @timeout, @buf_size and @dialog_token, | |
142 | * which are constant across the lifetime of the struct (the | |
143 | * dialog token being used only for debugging). | |
5aae2880 RR |
144 | */ |
145 | struct tid_ampdu_rx { | |
a87f736d | 146 | struct rcu_head rcu_head; |
2bff8ebf | 147 | spinlock_t reorder_lock; |
5aae2880 | 148 | struct sk_buff **reorder_buf; |
4d050f1d | 149 | unsigned long *reorder_time; |
5aae2880 | 150 | struct timer_list session_timer; |
2bff8ebf | 151 | struct timer_list reorder_timer; |
056cdd59 JB |
152 | u16 head_seq_num; |
153 | u16 stored_mpdu_num; | |
cee24a3e RR |
154 | u16 ssn; |
155 | u16 buf_size; | |
156 | u16 timeout; | |
157 | u8 dialog_token; | |
5aae2880 RR |
158 | }; |
159 | ||
fcea6007 JB |
160 | /** |
161 | * struct sta_ampdu_mlme - STA aggregation information. | |
162 | * | |
a87f736d | 163 | * @tid_rx: aggregation info for Rx per TID -- RCU protected |
fcea6007 | 164 | * @tid_tx: aggregation info for Tx per TID |
ec034b20 | 165 | * @tid_start_tx: sessions where start was requested |
fcea6007 JB |
166 | * @addba_req_num: number of times addBA request has been sent. |
167 | * @dialog_token_allocator: dialog token enumerator for each new session; | |
0ab33703 | 168 | * @work: work struct for starting/stopping aggregation |
7c3b1dd8 JB |
169 | * @tid_rx_timer_expired: bitmap indicating on which TIDs the |
170 | * RX timer expired until the work for it runs | |
f41ccd71 SL |
171 | * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the |
172 | * driver requested to close until the work for it runs | |
a93e3644 JB |
173 | * @mtx: mutex to protect all TX data (except non-NULL assignments |
174 | * to tid_tx[idx], which are protected by the sta spinlock) | |
fcea6007 JB |
175 | */ |
176 | struct sta_ampdu_mlme { | |
a93e3644 | 177 | struct mutex mtx; |
fcea6007 | 178 | /* rx */ |
40b275b6 | 179 | struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM]; |
7c3b1dd8 | 180 | unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)]; |
f41ccd71 | 181 | unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)]; |
fcea6007 | 182 | /* tx */ |
0ab33703 | 183 | struct work_struct work; |
40b275b6 | 184 | struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM]; |
ec034b20 | 185 | struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM]; |
fcea6007 JB |
186 | u8 addba_req_num[STA_TID_NUM]; |
187 | u8 dialog_token_allocator; | |
188 | }; | |
189 | ||
190 | ||
693b1bbc JB |
191 | /** |
192 | * struct sta_info - STA information | |
193 | * | |
194 | * This structure collects information about a station that | |
195 | * mac80211 is communicating with. | |
196 | * | |
197 | * @list: global linked list entry | |
198 | * @hnext: hash table linked list pointer | |
199 | * @local: pointer to the global information | |
e25cf4a6 | 200 | * @sdata: virtual interface this station belongs to |
e31b8213 JB |
201 | * @ptk: peer key negotiated with this station, if any |
202 | * @gtk: group keys negotiated with this station, if any | |
e25cf4a6 JB |
203 | * @rate_ctrl: rate control algorithm reference |
204 | * @rate_ctrl_priv: rate control private per-STA pointer | |
205 | * @last_tx_rate: rate used for last transmit, to report to userspace as | |
206 | * "the" transmit rate | |
3af6334c FF |
207 | * @last_rx_rate_idx: rx status rate index of the last data packet |
208 | * @last_rx_rate_flag: rx status flag of the last data packet | |
6ef307bc RD |
209 | * @lock: used for locking all fields that require locking, see comments |
210 | * in the header file. | |
211 | * @flaglock: spinlock for flags accesses | |
841507f5 | 212 | * @drv_unblock_wk: used for driver PS unblocking |
e25cf4a6 | 213 | * @listen_interval: listen interval of this station, when we're acting as AP |
693b1bbc JB |
214 | * @flags: STA flags, see &enum ieee80211_sta_info_flags |
215 | * @ps_tx_buf: buffer of frames to transmit to this station | |
216 | * when it leaves power saving state | |
217 | * @tx_filtered: buffer of frames we already tried to transmit | |
218 | * but were filtered by hardware due to STA having entered | |
219 | * power saving state | |
220 | * @rx_packets: Number of MSDUs received from this STA | |
221 | * @rx_bytes: Number of bytes received from this STA | |
e25cf4a6 JB |
222 | * @wep_weak_iv_count: number of weak WEP IVs received from this station |
223 | * @last_rx: time (in jiffies) when last frame was received from this STA | |
ebe27c91 | 224 | * @last_connected: time (in seconds) when a station got connected |
6ef307bc RD |
225 | * @num_duplicates: number of duplicate frames received from this STA |
226 | * @rx_fragments: number of received MPDUs | |
227 | * @rx_dropped: number of dropped MPDUs from this STA | |
228 | * @last_signal: signal of last received frame from this STA | |
541a45a1 | 229 | * @avg_signal: moving average of signal of received frames from this STA |
6ef307bc | 230 | * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) |
e25cf4a6 JB |
231 | * @tx_filtered_count: number of frames the hardware filtered for this STA |
232 | * @tx_retry_failed: number of frames that failed retry | |
233 | * @tx_retry_count: total number of retries for frames to this STA | |
6ef307bc RD |
234 | * @fail_avg: moving percentage of failed MSDUs |
235 | * @tx_packets: number of RX/TX MSDUs | |
e25cf4a6 | 236 | * @tx_bytes: number of bytes transmitted to this STA |
6ef307bc | 237 | * @tx_fragments: number of transmitted MPDUs |
e25cf4a6 JB |
238 | * @tid_seq: per-TID sequence numbers for sending to this STA |
239 | * @ampdu_mlme: A-MPDU state machine state | |
6ef307bc | 240 | * @timer_to_tid: identity mapping to ID timers |
6ef307bc RD |
241 | * @llid: Local link ID |
242 | * @plid: Peer link ID | |
243 | * @reason: Cancel reason on PLINK_HOLDING state | |
244 | * @plink_retries: Retries in establishment | |
e25cf4a6 JB |
245 | * @ignore_plink_timer: ignore the peer-link timer (used internally) |
246 | * @plink_state: peer link state | |
247 | * @plink_timeout: timeout of peer link | |
248 | * @plink_timer: peer link watch timer | |
cce4c77b | 249 | * @plink_timer_was_running: used by suspend/resume to restore timers |
6ef307bc | 250 | * @debugfs: debug filesystem info |
af818581 | 251 | * @dead: set to true when sta is unlinked |
34e89507 | 252 | * @uploaded: set to true when sta is uploaded to the driver |
99ba2a14 | 253 | * @lost_packets: number of consecutive lost packets |
2a33bee2 GE |
254 | * @dummy: indicate a dummy station created for receiving |
255 | * EAP frames before association | |
256 | * @sta: station information we share with the driver | |
693b1bbc | 257 | */ |
f0706e82 | 258 | struct sta_info { |
693b1bbc | 259 | /* General information, mostly static */ |
f0706e82 | 260 | struct list_head list; |
40b275b6 | 261 | struct sta_info __rcu *hnext; |
f0706e82 | 262 | struct ieee80211_local *local; |
d0709a65 | 263 | struct ieee80211_sub_if_data *sdata; |
40b275b6 JB |
264 | struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; |
265 | struct ieee80211_key __rcu *ptk; | |
f0706e82 JB |
266 | struct rate_control_ref *rate_ctrl; |
267 | void *rate_ctrl_priv; | |
07346f81 | 268 | spinlock_t lock; |
5a9f7b04 | 269 | spinlock_t flaglock; |
17741cdc | 270 | |
af818581 JB |
271 | struct work_struct drv_unblock_wk; |
272 | ||
693b1bbc | 273 | u16 listen_interval; |
f0706e82 | 274 | |
af818581 JB |
275 | bool dead; |
276 | ||
34e89507 | 277 | bool uploaded; |
693b1bbc | 278 | |
5a9f7b04 JB |
279 | /* |
280 | * frequently updated, locked with own spinlock (flaglock), | |
281 | * use the accessors defined below | |
282 | */ | |
693b1bbc JB |
283 | u32 flags; |
284 | ||
285 | /* | |
286 | * STA powersave frame queues, no more than the internal | |
287 | * locking required. | |
288 | */ | |
289 | struct sk_buff_head ps_tx_buf; | |
290 | struct sk_buff_head tx_filtered; | |
291 | ||
292 | /* Updated from RX path only, no locking requirements */ | |
293 | unsigned long rx_packets, rx_bytes; | |
294 | unsigned long wep_weak_iv_count; | |
295 | unsigned long last_rx; | |
ebe27c91 | 296 | long last_connected; |
6ef307bc RD |
297 | unsigned long num_duplicates; |
298 | unsigned long rx_fragments; | |
299 | unsigned long rx_dropped; | |
300 | int last_signal; | |
541a45a1 | 301 | struct ewma avg_signal; |
9e26297a JB |
302 | /* Plus 1 for non-QoS frames */ |
303 | __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1]; | |
693b1bbc JB |
304 | |
305 | /* Updated from TX status path only, no locking requirements */ | |
306 | unsigned long tx_filtered_count; | |
307 | unsigned long tx_retry_failed, tx_retry_count; | |
693b1bbc JB |
308 | /* moving percentage of failed MSDUs */ |
309 | unsigned int fail_avg; | |
310 | ||
311 | /* Updated from TX path only, no locking requirements */ | |
6ef307bc | 312 | unsigned long tx_packets; |
693b1bbc | 313 | unsigned long tx_bytes; |
6ef307bc | 314 | unsigned long tx_fragments; |
e6a9854b | 315 | struct ieee80211_tx_rate last_tx_rate; |
3af6334c FF |
316 | int last_rx_rate_idx; |
317 | int last_rx_rate_flag; | |
f591fa5d | 318 | u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; |
f0706e82 | 319 | |
d0709a65 | 320 | /* |
07346f81 | 321 | * Aggregation information, locked with lock. |
d0709a65 | 322 | */ |
5aae2880 | 323 | struct sta_ampdu_mlme ampdu_mlme; |
6ef307bc | 324 | u8 timer_to_tid[STA_TID_NUM]; |
693b1bbc | 325 | |
ee385855 | 326 | #ifdef CONFIG_MAC80211_MESH |
693b1bbc JB |
327 | /* |
328 | * Mesh peer link attributes | |
329 | * TODO: move to a sub-structure that is referenced with pointer? | |
330 | */ | |
6ef307bc RD |
331 | __le16 llid; |
332 | __le16 plid; | |
333 | __le16 reason; | |
334 | u8 plink_retries; | |
7495883b | 335 | bool ignore_plink_timer; |
5bb644a0 | 336 | bool plink_timer_was_running; |
57cf8043 | 337 | enum nl80211_plink_state plink_state; |
ee385855 LCC |
338 | u32 plink_timeout; |
339 | struct timer_list plink_timer; | |
ee385855 | 340 | #endif |
10816d40 | 341 | |
e9f207f0 JB |
342 | #ifdef CONFIG_MAC80211_DEBUGFS |
343 | struct sta_info_debugfsdentries { | |
344 | struct dentry *dir; | |
63044e9f | 345 | bool add_has_run; |
e9f207f0 JB |
346 | } debugfs; |
347 | #endif | |
17741cdc | 348 | |
99ba2a14 JB |
349 | unsigned int lost_packets; |
350 | ||
2a33bee2 GE |
351 | /* should be right in front of sta to be in the same cache line */ |
352 | bool dummy; | |
353 | ||
17741cdc JB |
354 | /* keep last! */ |
355 | struct ieee80211_sta sta; | |
f0706e82 JB |
356 | }; |
357 | ||
57cf8043 | 358 | static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) |
d6d1a5a7 JB |
359 | { |
360 | #ifdef CONFIG_MAC80211_MESH | |
361 | return sta->plink_state; | |
362 | #endif | |
57cf8043 | 363 | return NL80211_PLINK_LISTEN; |
d6d1a5a7 JB |
364 | } |
365 | ||
07346f81 JB |
366 | static inline void set_sta_flags(struct sta_info *sta, const u32 flags) |
367 | { | |
5a9f7b04 JB |
368 | unsigned long irqfl; |
369 | ||
370 | spin_lock_irqsave(&sta->flaglock, irqfl); | |
07346f81 | 371 | sta->flags |= flags; |
5a9f7b04 | 372 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
373 | } |
374 | ||
375 | static inline void clear_sta_flags(struct sta_info *sta, const u32 flags) | |
376 | { | |
5a9f7b04 JB |
377 | unsigned long irqfl; |
378 | ||
379 | spin_lock_irqsave(&sta->flaglock, irqfl); | |
07346f81 | 380 | sta->flags &= ~flags; |
5a9f7b04 | 381 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
382 | } |
383 | ||
07346f81 JB |
384 | static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags) |
385 | { | |
386 | u32 ret; | |
5a9f7b04 | 387 | unsigned long irqfl; |
07346f81 | 388 | |
5a9f7b04 | 389 | spin_lock_irqsave(&sta->flaglock, irqfl); |
07346f81 | 390 | ret = sta->flags & flags; |
5a9f7b04 | 391 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
392 | |
393 | return ret; | |
394 | } | |
395 | ||
396 | static inline u32 test_and_clear_sta_flags(struct sta_info *sta, | |
397 | const u32 flags) | |
398 | { | |
399 | u32 ret; | |
5a9f7b04 | 400 | unsigned long irqfl; |
07346f81 | 401 | |
5a9f7b04 | 402 | spin_lock_irqsave(&sta->flaglock, irqfl); |
07346f81 JB |
403 | ret = sta->flags & flags; |
404 | sta->flags &= ~flags; | |
5a9f7b04 | 405 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
406 | |
407 | return ret; | |
408 | } | |
409 | ||
410 | static inline u32 get_sta_flags(struct sta_info *sta) | |
411 | { | |
412 | u32 ret; | |
5a9f7b04 | 413 | unsigned long irqfl; |
07346f81 | 414 | |
5a9f7b04 | 415 | spin_lock_irqsave(&sta->flaglock, irqfl); |
07346f81 | 416 | ret = sta->flags; |
5a9f7b04 | 417 | spin_unlock_irqrestore(&sta->flaglock, irqfl); |
07346f81 JB |
418 | |
419 | return ret; | |
420 | } | |
421 | ||
ec034b20 JB |
422 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
423 | struct tid_ampdu_tx *tid_tx); | |
f0706e82 | 424 | |
40b275b6 JB |
425 | static inline struct tid_ampdu_tx * |
426 | rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) | |
427 | { | |
428 | return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], | |
429 | lockdep_is_held(&sta->lock) || | |
430 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
431 | } | |
f0706e82 JB |
432 | |
433 | #define STA_HASH_SIZE 256 | |
434 | #define STA_HASH(sta) (sta[5]) | |
435 | ||
436 | ||
437 | /* Maximum number of frames to buffer per power saving station */ | |
438 | #define STA_MAX_TX_BUFFER 128 | |
439 | ||
440 | /* Minimum buffered frame expiry time. If STA uses listen interval that is | |
441 | * smaller than this value, the minimum value here is used instead. */ | |
442 | #define STA_TX_BUFFER_EXPIRE (10 * HZ) | |
443 | ||
444 | /* How often station data is cleaned up (e.g., expiration of buffered frames) | |
445 | */ | |
446 | #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) | |
447 | ||
d0709a65 | 448 | /* |
abe60632 | 449 | * Get a STA info, must be under RCU read lock. |
d0709a65 | 450 | */ |
abe60632 JB |
451 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
452 | const u8 *addr); | |
453 | ||
2a33bee2 GE |
454 | struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, |
455 | const u8 *addr); | |
456 | ||
0e5ded5a FF |
457 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, |
458 | const u8 *addr); | |
459 | ||
2a33bee2 GE |
460 | struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, |
461 | const u8 *addr); | |
462 | ||
abe60632 JB |
463 | static inline |
464 | void for_each_sta_info_type_check(struct ieee80211_local *local, | |
465 | const u8 *addr, | |
466 | struct sta_info *sta, | |
467 | struct sta_info *nxt) | |
468 | { | |
469 | } | |
470 | ||
38bdb650 | 471 | #define for_each_sta_info(local, _addr, _sta, nxt) \ |
2a33bee2 GE |
472 | for ( /* initialise loop */ \ |
473 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ | |
474 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
475 | /* typecheck */ \ | |
476 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ | |
477 | /* continue condition */ \ | |
478 | _sta; \ | |
479 | /* advance loop */ \ | |
480 | _sta = nxt, \ | |
481 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
482 | ) \ | |
483 | /* run code only if address matches and it's not a dummy sta */ \ | |
484 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \ | |
485 | !_sta->dummy) | |
486 | ||
487 | #define for_each_sta_info_rx(local, _addr, _sta, nxt) \ | |
abe60632 | 488 | for ( /* initialise loop */ \ |
38bdb650 FF |
489 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ |
490 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
abe60632 | 491 | /* typecheck */ \ |
38bdb650 | 492 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ |
abe60632 | 493 | /* continue condition */ \ |
38bdb650 | 494 | _sta; \ |
abe60632 | 495 | /* advance loop */ \ |
38bdb650 FF |
496 | _sta = nxt, \ |
497 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
abe60632 JB |
498 | ) \ |
499 | /* compare address and run code only if it matches */ \ | |
38bdb650 | 500 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0) |
abe60632 | 501 | |
d0709a65 JB |
502 | /* |
503 | * Get STA info by index, BROKEN! | |
504 | */ | |
3b53fde8 JB |
505 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
506 | int idx); | |
d0709a65 | 507 | /* |
73651ee6 JB |
508 | * Create a new STA info, caller owns returned structure |
509 | * until sta_info_insert(). | |
d0709a65 | 510 | */ |
73651ee6 JB |
511 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
512 | u8 *addr, gfp_t gfp); | |
513 | /* | |
514 | * Insert STA info into hash table/list, returns zero or a | |
515 | * -EEXIST if (if the same MAC address is already present). | |
516 | * | |
34e89507 JB |
517 | * Calling the non-rcu version makes the caller relinquish, |
518 | * the _rcu version calls read_lock_rcu() and must be called | |
519 | * without it held. | |
73651ee6 JB |
520 | */ |
521 | int sta_info_insert(struct sta_info *sta); | |
34e89507 JB |
522 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); |
523 | int sta_info_insert_atomic(struct sta_info *sta); | |
2a33bee2 | 524 | int sta_info_reinsert(struct sta_info *sta); |
34e89507 JB |
525 | |
526 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, | |
527 | const u8 *addr); | |
528 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
529 | const u8 *addr); | |
f0706e82 | 530 | |
004c872e JB |
531 | void sta_info_set_tim_bit(struct sta_info *sta); |
532 | void sta_info_clear_tim_bit(struct sta_info *sta); | |
533 | ||
d0709a65 | 534 | void sta_info_init(struct ieee80211_local *local); |
d0709a65 | 535 | void sta_info_stop(struct ieee80211_local *local); |
44213b5e | 536 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 537 | struct ieee80211_sub_if_data *sdata); |
24723d1b JB |
538 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
539 | unsigned long exp_time); | |
d0709a65 | 540 | |
af818581 JB |
541 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); |
542 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); | |
543 | ||
f0706e82 | 544 | #endif /* STA_INFO_H */ |