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 | * | |
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. |
e7f4a940 | 55 | * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. |
238814fd JB |
56 | */ |
57 | enum ieee80211_sta_info_flags { | |
c2c98fde JB |
58 | WLAN_STA_AUTH, |
59 | WLAN_STA_ASSOC, | |
60 | WLAN_STA_PS_STA, | |
61 | WLAN_STA_AUTHORIZED, | |
62 | WLAN_STA_SHORT_PREAMBLE, | |
63 | WLAN_STA_ASSOC_AP, | |
64 | WLAN_STA_WME, | |
65 | WLAN_STA_WDS, | |
66 | WLAN_STA_CLEAR_PS_FILT, | |
67 | WLAN_STA_MFP, | |
68 | WLAN_STA_BLOCK_BA, | |
69 | WLAN_STA_PS_DRIVER, | |
70 | WLAN_STA_PSPOLL, | |
71 | WLAN_STA_TDLS_PEER, | |
72 | WLAN_STA_TDLS_PEER_AUTH, | |
73 | WLAN_STA_UAPSD, | |
74 | WLAN_STA_SP, | |
e7f4a940 | 75 | WLAN_STA_4ADDR_EVENT, |
238814fd | 76 | }; |
f0706e82 | 77 | |
5aae2880 RR |
78 | #define STA_TID_NUM 16 |
79 | #define ADDBA_RESP_INTERVAL HZ | |
a622ab72 | 80 | #define HT_AGG_MAX_RETRIES 0x3 |
5aae2880 | 81 | |
a622ab72 JB |
82 | #define HT_AGG_STATE_DRV_READY 0 |
83 | #define HT_AGG_STATE_RESPONSE_RECEIVED 1 | |
84 | #define HT_AGG_STATE_OPERATIONAL 2 | |
85 | #define HT_AGG_STATE_STOPPING 3 | |
0ab33703 JB |
86 | #define HT_AGG_STATE_WANT_START 4 |
87 | #define HT_AGG_STATE_WANT_STOP 5 | |
80656c20 RR |
88 | |
89 | /** | |
90 | * struct tid_ampdu_tx - TID aggregation information (Tx). | |
91 | * | |
a622ab72 | 92 | * @rcu_head: rcu head for freeing structure |
80656c20 | 93 | * @addba_resp_timer: timer for peer's response to addba request |
cd8ffc80 | 94 | * @pending: pending frames queue -- use sta's spinlock to protect |
cee24a3e | 95 | * @dialog_token: dialog token for aggregation session |
bd2ce6e4 | 96 | * @timeout: session timeout value to be filled in ADDBA requests |
a622ab72 JB |
97 | * @state: session state (see above) |
98 | * @stop_initiator: initiator of a session stop | |
53f73c09 | 99 | * @tx_stop: TX DelBA frame when stopping |
0b01f030 | 100 | * @buf_size: reorder buffer size at receiver |
f0425bed FF |
101 | * @failed_bar_ssn: ssn of the last failed BAR tx attempt |
102 | * @bar_pending: BAR needs to be re-sent | |
a622ab72 | 103 | * |
dd318575 JB |
104 | * This structure's lifetime is managed by RCU, assignments to |
105 | * the array holding it must hold the aggregation mutex. | |
106 | * | |
107 | * The TX path can access it under RCU lock-free if, and | |
108 | * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL | |
109 | * set. Otherwise, the TX path must also acquire the spinlock | |
110 | * and re-check the state, see comments in the tx code | |
111 | * touching it. | |
80656c20 RR |
112 | */ |
113 | struct tid_ampdu_tx { | |
a622ab72 | 114 | struct rcu_head rcu_head; |
80656c20 | 115 | struct timer_list addba_resp_timer; |
cd8ffc80 | 116 | struct sk_buff_head pending; |
a622ab72 | 117 | unsigned long state; |
bd2ce6e4 | 118 | u16 timeout; |
cee24a3e | 119 | u8 dialog_token; |
a622ab72 | 120 | u8 stop_initiator; |
53f73c09 | 121 | bool tx_stop; |
0b01f030 | 122 | u8 buf_size; |
f0425bed FF |
123 | |
124 | u16 failed_bar_ssn; | |
125 | bool bar_pending; | |
80656c20 | 126 | }; |
5aae2880 RR |
127 | |
128 | /** | |
129 | * struct tid_ampdu_rx - TID aggregation information (Rx). | |
130 | * | |
5aae2880 | 131 | * @reorder_buf: buffer to reorder incoming aggregated MPDUs |
4d050f1d | 132 | * @reorder_time: jiffies when skb was added |
5aae2880 | 133 | * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) |
2bff8ebf | 134 | * @reorder_timer: releases expired frames from the reorder buffer. |
056cdd59 JB |
135 | * @head_seq_num: head sequence number in reordering buffer. |
136 | * @stored_mpdu_num: number of MPDUs in reordering buffer | |
cee24a3e RR |
137 | * @ssn: Starting Sequence Number expected to be aggregated. |
138 | * @buf_size: buffer size for incoming A-MPDUs | |
20ad19d0 | 139 | * @timeout: reset timer value (in TUs). |
cee24a3e | 140 | * @dialog_token: dialog token for aggregation session |
a87f736d | 141 | * @rcu_head: RCU head used for freeing this struct |
2bff8ebf | 142 | * @reorder_lock: serializes access to reorder buffer, see below. |
a87f736d | 143 | * |
dd318575 JB |
144 | * This structure's lifetime is managed by RCU, assignments to |
145 | * the array holding it must hold the aggregation mutex. | |
2bff8ebf | 146 | * |
dd318575 JB |
147 | * The @reorder_lock is used to protect the members of this |
148 | * struct, except for @timeout, @buf_size and @dialog_token, | |
149 | * which are constant across the lifetime of the struct (the | |
150 | * dialog token being used only for debugging). | |
5aae2880 RR |
151 | */ |
152 | struct tid_ampdu_rx { | |
a87f736d | 153 | struct rcu_head rcu_head; |
2bff8ebf | 154 | spinlock_t reorder_lock; |
5aae2880 | 155 | struct sk_buff **reorder_buf; |
4d050f1d | 156 | unsigned long *reorder_time; |
5aae2880 | 157 | struct timer_list session_timer; |
2bff8ebf | 158 | struct timer_list reorder_timer; |
056cdd59 JB |
159 | u16 head_seq_num; |
160 | u16 stored_mpdu_num; | |
cee24a3e RR |
161 | u16 ssn; |
162 | u16 buf_size; | |
163 | u16 timeout; | |
164 | u8 dialog_token; | |
5aae2880 RR |
165 | }; |
166 | ||
fcea6007 JB |
167 | /** |
168 | * struct sta_ampdu_mlme - STA aggregation information. | |
169 | * | |
a87f736d | 170 | * @tid_rx: aggregation info for Rx per TID -- RCU protected |
fcea6007 | 171 | * @tid_tx: aggregation info for Tx per TID |
ec034b20 | 172 | * @tid_start_tx: sessions where start was requested |
fcea6007 JB |
173 | * @addba_req_num: number of times addBA request has been sent. |
174 | * @dialog_token_allocator: dialog token enumerator for each new session; | |
0ab33703 | 175 | * @work: work struct for starting/stopping aggregation |
7c3b1dd8 JB |
176 | * @tid_rx_timer_expired: bitmap indicating on which TIDs the |
177 | * RX timer expired until the work for it runs | |
f41ccd71 SL |
178 | * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the |
179 | * driver requested to close until the work for it runs | |
a93e3644 JB |
180 | * @mtx: mutex to protect all TX data (except non-NULL assignments |
181 | * to tid_tx[idx], which are protected by the sta spinlock) | |
fcea6007 JB |
182 | */ |
183 | struct sta_ampdu_mlme { | |
a93e3644 | 184 | struct mutex mtx; |
fcea6007 | 185 | /* rx */ |
40b275b6 | 186 | struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM]; |
7c3b1dd8 | 187 | unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)]; |
f41ccd71 | 188 | unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)]; |
fcea6007 | 189 | /* tx */ |
0ab33703 | 190 | struct work_struct work; |
40b275b6 | 191 | struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM]; |
ec034b20 | 192 | struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM]; |
fcea6007 JB |
193 | u8 addba_req_num[STA_TID_NUM]; |
194 | u8 dialog_token_allocator; | |
195 | }; | |
196 | ||
197 | ||
693b1bbc JB |
198 | /** |
199 | * struct sta_info - STA information | |
200 | * | |
201 | * This structure collects information about a station that | |
202 | * mac80211 is communicating with. | |
203 | * | |
204 | * @list: global linked list entry | |
205 | * @hnext: hash table linked list pointer | |
206 | * @local: pointer to the global information | |
e25cf4a6 | 207 | * @sdata: virtual interface this station belongs to |
e31b8213 JB |
208 | * @ptk: peer key negotiated with this station, if any |
209 | * @gtk: group keys negotiated with this station, if any | |
e25cf4a6 JB |
210 | * @rate_ctrl: rate control algorithm reference |
211 | * @rate_ctrl_priv: rate control private per-STA pointer | |
212 | * @last_tx_rate: rate used for last transmit, to report to userspace as | |
213 | * "the" transmit rate | |
3af6334c FF |
214 | * @last_rx_rate_idx: rx status rate index of the last data packet |
215 | * @last_rx_rate_flag: rx status flag of the last data packet | |
6ef307bc RD |
216 | * @lock: used for locking all fields that require locking, see comments |
217 | * in the header file. | |
841507f5 | 218 | * @drv_unblock_wk: used for driver PS unblocking |
e25cf4a6 | 219 | * @listen_interval: listen interval of this station, when we're acting as AP |
c2c98fde | 220 | * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly |
948d887d JB |
221 | * @ps_tx_buf: buffers (per AC) of frames to transmit to this station |
222 | * when it leaves power saving state or polls | |
223 | * @tx_filtered: buffers (per AC) of frames we already tried to | |
224 | * transmit but were filtered by hardware due to STA having | |
225 | * entered power saving state, these are also delivered to | |
226 | * the station when it leaves powersave or polls for frames | |
227 | * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on | |
693b1bbc JB |
228 | * @rx_packets: Number of MSDUs received from this STA |
229 | * @rx_bytes: Number of bytes received from this STA | |
e25cf4a6 JB |
230 | * @wep_weak_iv_count: number of weak WEP IVs received from this station |
231 | * @last_rx: time (in jiffies) when last frame was received from this STA | |
ebe27c91 | 232 | * @last_connected: time (in seconds) when a station got connected |
6ef307bc RD |
233 | * @num_duplicates: number of duplicate frames received from this STA |
234 | * @rx_fragments: number of received MPDUs | |
235 | * @rx_dropped: number of dropped MPDUs from this STA | |
236 | * @last_signal: signal of last received frame from this STA | |
541a45a1 | 237 | * @avg_signal: moving average of signal of received frames from this STA |
6ef307bc | 238 | * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue) |
e25cf4a6 JB |
239 | * @tx_filtered_count: number of frames the hardware filtered for this STA |
240 | * @tx_retry_failed: number of frames that failed retry | |
241 | * @tx_retry_count: total number of retries for frames to this STA | |
6ef307bc RD |
242 | * @fail_avg: moving percentage of failed MSDUs |
243 | * @tx_packets: number of RX/TX MSDUs | |
e25cf4a6 | 244 | * @tx_bytes: number of bytes transmitted to this STA |
6ef307bc | 245 | * @tx_fragments: number of transmitted MPDUs |
e25cf4a6 JB |
246 | * @tid_seq: per-TID sequence numbers for sending to this STA |
247 | * @ampdu_mlme: A-MPDU state machine state | |
6ef307bc | 248 | * @timer_to_tid: identity mapping to ID timers |
6ef307bc RD |
249 | * @llid: Local link ID |
250 | * @plid: Peer link ID | |
251 | * @reason: Cancel reason on PLINK_HOLDING state | |
252 | * @plink_retries: Retries in establishment | |
e25cf4a6 JB |
253 | * @ignore_plink_timer: ignore the peer-link timer (used internally) |
254 | * @plink_state: peer link state | |
255 | * @plink_timeout: timeout of peer link | |
256 | * @plink_timer: peer link watch timer | |
cce4c77b | 257 | * @plink_timer_was_running: used by suspend/resume to restore timers |
6ef307bc | 258 | * @debugfs: debug filesystem info |
af818581 | 259 | * @dead: set to true when sta is unlinked |
34e89507 | 260 | * @uploaded: set to true when sta is uploaded to the driver |
99ba2a14 | 261 | * @lost_packets: number of consecutive lost packets |
2a33bee2 GE |
262 | * @dummy: indicate a dummy station created for receiving |
263 | * EAP frames before association | |
264 | * @sta: station information we share with the driver | |
693b1bbc | 265 | */ |
f0706e82 | 266 | struct sta_info { |
693b1bbc | 267 | /* General information, mostly static */ |
f0706e82 | 268 | struct list_head list; |
40b275b6 | 269 | struct sta_info __rcu *hnext; |
f0706e82 | 270 | struct ieee80211_local *local; |
d0709a65 | 271 | struct ieee80211_sub_if_data *sdata; |
40b275b6 JB |
272 | struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; |
273 | struct ieee80211_key __rcu *ptk; | |
f0706e82 JB |
274 | struct rate_control_ref *rate_ctrl; |
275 | void *rate_ctrl_priv; | |
07346f81 | 276 | spinlock_t lock; |
17741cdc | 277 | |
af818581 JB |
278 | struct work_struct drv_unblock_wk; |
279 | ||
693b1bbc | 280 | u16 listen_interval; |
f0706e82 | 281 | |
af818581 JB |
282 | bool dead; |
283 | ||
34e89507 | 284 | bool uploaded; |
693b1bbc | 285 | |
c2c98fde JB |
286 | /* use the accessors defined below */ |
287 | unsigned long _flags; | |
693b1bbc JB |
288 | |
289 | /* | |
290 | * STA powersave frame queues, no more than the internal | |
291 | * locking required. | |
292 | */ | |
948d887d JB |
293 | struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; |
294 | struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; | |
295 | unsigned long driver_buffered_tids; | |
693b1bbc JB |
296 | |
297 | /* Updated from RX path only, no locking requirements */ | |
298 | unsigned long rx_packets, rx_bytes; | |
299 | unsigned long wep_weak_iv_count; | |
300 | unsigned long last_rx; | |
ebe27c91 | 301 | long last_connected; |
6ef307bc RD |
302 | unsigned long num_duplicates; |
303 | unsigned long rx_fragments; | |
304 | unsigned long rx_dropped; | |
305 | int last_signal; | |
541a45a1 | 306 | struct ewma avg_signal; |
9e26297a JB |
307 | /* Plus 1 for non-QoS frames */ |
308 | __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1]; | |
693b1bbc JB |
309 | |
310 | /* Updated from TX status path only, no locking requirements */ | |
311 | unsigned long tx_filtered_count; | |
312 | unsigned long tx_retry_failed, tx_retry_count; | |
693b1bbc JB |
313 | /* moving percentage of failed MSDUs */ |
314 | unsigned int fail_avg; | |
315 | ||
316 | /* Updated from TX path only, no locking requirements */ | |
6ef307bc | 317 | unsigned long tx_packets; |
693b1bbc | 318 | unsigned long tx_bytes; |
6ef307bc | 319 | unsigned long tx_fragments; |
e6a9854b | 320 | struct ieee80211_tx_rate last_tx_rate; |
3af6334c FF |
321 | int last_rx_rate_idx; |
322 | int last_rx_rate_flag; | |
f591fa5d | 323 | u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; |
f0706e82 | 324 | |
d0709a65 | 325 | /* |
07346f81 | 326 | * Aggregation information, locked with lock. |
d0709a65 | 327 | */ |
5aae2880 | 328 | struct sta_ampdu_mlme ampdu_mlme; |
6ef307bc | 329 | u8 timer_to_tid[STA_TID_NUM]; |
693b1bbc | 330 | |
ee385855 | 331 | #ifdef CONFIG_MAC80211_MESH |
693b1bbc JB |
332 | /* |
333 | * Mesh peer link attributes | |
334 | * TODO: move to a sub-structure that is referenced with pointer? | |
335 | */ | |
6ef307bc RD |
336 | __le16 llid; |
337 | __le16 plid; | |
338 | __le16 reason; | |
339 | u8 plink_retries; | |
7495883b | 340 | bool ignore_plink_timer; |
5bb644a0 | 341 | bool plink_timer_was_running; |
57cf8043 | 342 | enum nl80211_plink_state plink_state; |
ee385855 LCC |
343 | u32 plink_timeout; |
344 | struct timer_list plink_timer; | |
ee385855 | 345 | #endif |
10816d40 | 346 | |
e9f207f0 JB |
347 | #ifdef CONFIG_MAC80211_DEBUGFS |
348 | struct sta_info_debugfsdentries { | |
349 | struct dentry *dir; | |
63044e9f | 350 | bool add_has_run; |
e9f207f0 JB |
351 | } debugfs; |
352 | #endif | |
17741cdc | 353 | |
99ba2a14 JB |
354 | unsigned int lost_packets; |
355 | ||
2a33bee2 GE |
356 | /* should be right in front of sta to be in the same cache line */ |
357 | bool dummy; | |
358 | ||
17741cdc JB |
359 | /* keep last! */ |
360 | struct ieee80211_sta sta; | |
f0706e82 JB |
361 | }; |
362 | ||
57cf8043 | 363 | static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) |
d6d1a5a7 JB |
364 | { |
365 | #ifdef CONFIG_MAC80211_MESH | |
366 | return sta->plink_state; | |
367 | #endif | |
57cf8043 | 368 | return NL80211_PLINK_LISTEN; |
d6d1a5a7 JB |
369 | } |
370 | ||
c2c98fde JB |
371 | static inline void set_sta_flag(struct sta_info *sta, |
372 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 373 | { |
c2c98fde | 374 | set_bit(flag, &sta->_flags); |
07346f81 JB |
375 | } |
376 | ||
c2c98fde JB |
377 | static inline void clear_sta_flag(struct sta_info *sta, |
378 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 379 | { |
c2c98fde | 380 | clear_bit(flag, &sta->_flags); |
07346f81 JB |
381 | } |
382 | ||
c2c98fde JB |
383 | static inline int test_sta_flag(struct sta_info *sta, |
384 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 385 | { |
c2c98fde | 386 | return test_bit(flag, &sta->_flags); |
07346f81 JB |
387 | } |
388 | ||
c2c98fde JB |
389 | static inline int test_and_clear_sta_flag(struct sta_info *sta, |
390 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 391 | { |
c2c98fde | 392 | return test_and_clear_bit(flag, &sta->_flags); |
07346f81 JB |
393 | } |
394 | ||
e7f4a940 JB |
395 | static inline int test_and_set_sta_flag(struct sta_info *sta, |
396 | enum ieee80211_sta_info_flags flag) | |
397 | { | |
398 | return test_and_set_bit(flag, &sta->_flags); | |
399 | } | |
400 | ||
ec034b20 JB |
401 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
402 | struct tid_ampdu_tx *tid_tx); | |
f0706e82 | 403 | |
40b275b6 JB |
404 | static inline struct tid_ampdu_tx * |
405 | rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) | |
406 | { | |
407 | return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], | |
408 | lockdep_is_held(&sta->lock) || | |
409 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
410 | } | |
f0706e82 JB |
411 | |
412 | #define STA_HASH_SIZE 256 | |
413 | #define STA_HASH(sta) (sta[5]) | |
414 | ||
415 | ||
948d887d JB |
416 | /* Maximum number of frames to buffer per power saving station per AC */ |
417 | #define STA_MAX_TX_BUFFER 64 | |
f0706e82 JB |
418 | |
419 | /* Minimum buffered frame expiry time. If STA uses listen interval that is | |
420 | * smaller than this value, the minimum value here is used instead. */ | |
421 | #define STA_TX_BUFFER_EXPIRE (10 * HZ) | |
422 | ||
423 | /* How often station data is cleaned up (e.g., expiration of buffered frames) | |
424 | */ | |
425 | #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) | |
426 | ||
d0709a65 | 427 | /* |
abe60632 | 428 | * Get a STA info, must be under RCU read lock. |
d0709a65 | 429 | */ |
abe60632 JB |
430 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
431 | const u8 *addr); | |
432 | ||
2a33bee2 GE |
433 | struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata, |
434 | const u8 *addr); | |
435 | ||
0e5ded5a FF |
436 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, |
437 | const u8 *addr); | |
438 | ||
2a33bee2 GE |
439 | struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata, |
440 | const u8 *addr); | |
441 | ||
abe60632 JB |
442 | static inline |
443 | void for_each_sta_info_type_check(struct ieee80211_local *local, | |
444 | const u8 *addr, | |
445 | struct sta_info *sta, | |
446 | struct sta_info *nxt) | |
447 | { | |
448 | } | |
449 | ||
38bdb650 | 450 | #define for_each_sta_info(local, _addr, _sta, nxt) \ |
2a33bee2 GE |
451 | for ( /* initialise loop */ \ |
452 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ | |
453 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
454 | /* typecheck */ \ | |
455 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ | |
456 | /* continue condition */ \ | |
457 | _sta; \ | |
458 | /* advance loop */ \ | |
459 | _sta = nxt, \ | |
460 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
461 | ) \ | |
462 | /* run code only if address matches and it's not a dummy sta */ \ | |
463 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \ | |
464 | !_sta->dummy) | |
465 | ||
466 | #define for_each_sta_info_rx(local, _addr, _sta, nxt) \ | |
abe60632 | 467 | for ( /* initialise loop */ \ |
38bdb650 FF |
468 | _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\ |
469 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \ | |
abe60632 | 470 | /* typecheck */ \ |
38bdb650 | 471 | for_each_sta_info_type_check(local, (_addr), _sta, nxt),\ |
abe60632 | 472 | /* continue condition */ \ |
38bdb650 | 473 | _sta; \ |
abe60632 | 474 | /* advance loop */ \ |
38bdb650 FF |
475 | _sta = nxt, \ |
476 | nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \ | |
abe60632 JB |
477 | ) \ |
478 | /* compare address and run code only if it matches */ \ | |
38bdb650 | 479 | if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0) |
abe60632 | 480 | |
d0709a65 JB |
481 | /* |
482 | * Get STA info by index, BROKEN! | |
483 | */ | |
3b53fde8 JB |
484 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
485 | int idx); | |
d0709a65 | 486 | /* |
73651ee6 JB |
487 | * Create a new STA info, caller owns returned structure |
488 | * until sta_info_insert(). | |
d0709a65 | 489 | */ |
73651ee6 JB |
490 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
491 | u8 *addr, gfp_t gfp); | |
492 | /* | |
493 | * Insert STA info into hash table/list, returns zero or a | |
494 | * -EEXIST if (if the same MAC address is already present). | |
495 | * | |
34e89507 JB |
496 | * Calling the non-rcu version makes the caller relinquish, |
497 | * the _rcu version calls read_lock_rcu() and must be called | |
498 | * without it held. | |
73651ee6 JB |
499 | */ |
500 | int sta_info_insert(struct sta_info *sta); | |
34e89507 JB |
501 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); |
502 | int sta_info_insert_atomic(struct sta_info *sta); | |
2a33bee2 | 503 | int sta_info_reinsert(struct sta_info *sta); |
34e89507 JB |
504 | |
505 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, | |
506 | const u8 *addr); | |
507 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
508 | const u8 *addr); | |
f0706e82 | 509 | |
c868cb35 | 510 | void sta_info_recalc_tim(struct sta_info *sta); |
004c872e | 511 | |
d0709a65 | 512 | void sta_info_init(struct ieee80211_local *local); |
d0709a65 | 513 | void sta_info_stop(struct ieee80211_local *local); |
44213b5e | 514 | int sta_info_flush(struct ieee80211_local *local, |
af8cdcd8 | 515 | struct ieee80211_sub_if_data *sdata); |
24723d1b JB |
516 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
517 | unsigned long exp_time); | |
d0709a65 | 518 | |
af818581 JB |
519 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); |
520 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); | |
47086fc5 | 521 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); |
af818581 | 522 | |
f0706e82 | 523 | #endif /* STA_INFO_H */ |