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Jiri Bencf0706e822007-05-05 11:45:53 -07001/*
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>
Johannes Berg2c8dccc2008-04-08 15:14:40 -040015#include "key.h"
Jiri Bencf0706e822007-05-05 11:45:53 -070016
Johannes Berg238814f2008-01-28 17:19:37 +010017/**
18 * enum ieee80211_sta_info_flags - Stations flags
19 *
20 * These flags are used with &struct sta_info's @flags member.
21 *
22 * @WLAN_STA_AUTH: Station is authenticated.
23 * @WLAN_STA_ASSOC: Station is associated.
24 * @WLAN_STA_PS: Station is in power-save mode
Johannes Berg238814f2008-01-28 17:19:37 +010025 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
26 * This bit is always checked so needs to be enabled for all stations
27 * when virtual port control is not in use.
28 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
29 * frames.
30 * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP.
31 * @WLAN_STA_WME: Station is a QoS-STA.
32 * @WLAN_STA_WDS: Station is one of our WDS peers.
Johannes Bergd46e1442008-02-20 23:59:33 +010033 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
Johannes Berge039fa42008-05-15 12:55:29 +020034 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
Johannes Bergd46e1442008-02-20 23:59:33 +010035 * frame to this station is transmitted.
Jouni Malinen5394af42009-01-08 13:31:59 +020036 * @WLAN_STA_MFP: Management frame protection is used with this STA.
Sujith722f0692009-03-17 08:50:06 +053037 * @WLAN_STA_SUSPEND: Set/cleared during a suspend/resume cycle.
38 * Used to deny ADDBA requests (both TX and RX).
Johannes Berg238814f2008-01-28 17:19:37 +010039 */
40enum ieee80211_sta_info_flags {
41 WLAN_STA_AUTH = 1<<0,
42 WLAN_STA_ASSOC = 1<<1,
43 WLAN_STA_PS = 1<<2,
Johannes Berg836341a2008-02-20 02:07:21 +010044 WLAN_STA_AUTHORIZED = 1<<3,
45 WLAN_STA_SHORT_PREAMBLE = 1<<4,
46 WLAN_STA_ASSOC_AP = 1<<5,
47 WLAN_STA_WME = 1<<6,
48 WLAN_STA_WDS = 1<<7,
Johannes Bergd46e1442008-02-20 23:59:33 +010049 WLAN_STA_CLEAR_PS_FILT = 1<<9,
Jouni Malinen5394af42009-01-08 13:31:59 +020050 WLAN_STA_MFP = 1<<10,
Sujith722f0692009-03-17 08:50:06 +053051 WLAN_STA_SUSPEND = 1<<11
Johannes Berg238814f2008-01-28 17:19:37 +010052};
Jiri Bencf0706e822007-05-05 11:45:53 -070053
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020054#define STA_TID_NUM 16
55#define ADDBA_RESP_INTERVAL HZ
Ron Rindjunsky80656c22008-01-28 14:07:16 +020056#define HT_AGG_MAX_RETRIES (0x3)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020057
58#define HT_AGG_STATE_INITIATOR_SHIFT (4)
59
Ron Rindjunsky80656c22008-01-28 14:07:16 +020060#define HT_ADDBA_REQUESTED_MSK BIT(0)
61#define HT_ADDBA_DRV_READY_MSK BIT(1)
62#define HT_ADDBA_RECEIVED_MSK BIT(2)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020063#define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3)
Ron Rindjunsky80656c22008-01-28 14:07:16 +020064#define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020065#define HT_AGG_STATE_IDLE (0x0)
Ron Rindjunsky80656c22008-01-28 14:07:16 +020066#define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
67 HT_ADDBA_DRV_READY_MSK | \
68 HT_ADDBA_RECEIVED_MSK)
69
70/**
71 * struct tid_ampdu_tx - TID aggregation information (Tx).
72 *
Ron Rindjunsky80656c22008-01-28 14:07:16 +020073 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +010074 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +020075 * @ssn: Starting Sequence Number expected to be aggregated.
76 * @dialog_token: dialog token for aggregation session
Ron Rindjunsky80656c22008-01-28 14:07:16 +020077 */
78struct tid_ampdu_tx {
Ron Rindjunsky80656c22008-01-28 14:07:16 +020079 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +010080 struct sk_buff_head pending;
Ron Rindjunskycee24a32008-03-26 20:36:03 +020081 u16 ssn;
82 u8 dialog_token;
Ron Rindjunsky80656c22008-01-28 14:07:16 +020083};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020084
85/**
86 * struct tid_ampdu_rx - TID aggregation information (Rx).
87 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020088 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +030089 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020090 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Johannes Berg056cdd52008-03-26 23:21:47 +010091 * @head_seq_num: head sequence number in reordering buffer.
92 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +020093 * @ssn: Starting Sequence Number expected to be aggregated.
94 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +010095 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +020096 * @dialog_token: dialog token for aggregation session
Johannes Berg0a16ec52009-02-18 09:56:47 +010097 * @shutdown: this session is being shut down due to STA removal
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020098 */
99struct tid_ampdu_rx {
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200100 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300101 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200102 struct timer_list session_timer;
Johannes Berg056cdd52008-03-26 23:21:47 +0100103 u16 head_seq_num;
104 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200105 u16 ssn;
106 u16 buf_size;
107 u16 timeout;
108 u8 dialog_token;
Johannes Berg55687e32009-02-10 21:25:51 +0100109 bool shutdown;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200110};
111
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800112/**
113 * enum plink_state - state of a mesh peer link finite state machine
114 *
115 * @PLINK_LISTEN: initial state, considered the implicit state of non existant
116 * mesh peer links
117 * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer
118 * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer
119 * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh
120 * peer
121 * @PLINK_ESTAB: mesh peer link is established
122 * @PLINK_HOLDING: mesh peer link is being closed or cancelled
123 * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded
124 */
Luis Carlos Coboee385852008-02-23 15:17:11 +0100125enum plink_state {
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800126 PLINK_LISTEN,
127 PLINK_OPN_SNT,
128 PLINK_OPN_RCVD,
129 PLINK_CNF_RCVD,
130 PLINK_ESTAB,
131 PLINK_HOLDING,
132 PLINK_BLOCKED
Luis Carlos Coboee385852008-02-23 15:17:11 +0100133};
Luis Carlos Coboee385852008-02-23 15:17:11 +0100134
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200135/**
136 * struct sta_ampdu_mlme - STA aggregation information.
137 *
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200138 * @tid_state_rx: TID's state in Rx session state machine.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200139 * @tid_rx: aggregation info for Rx per TID
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200140 * @tid_state_tx: TID's state in Tx session state machine.
141 * @tid_tx: aggregation info for Tx per TID
142 * @addba_req_num: number of times addBA request has been sent.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200143 * @dialog_token_allocator: dialog token enumerator for each new session;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200144 */
145struct sta_ampdu_mlme {
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200146 /* rx */
147 u8 tid_state_rx[STA_TID_NUM];
148 struct tid_ampdu_rx *tid_rx[STA_TID_NUM];
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200149 /* tx */
150 u8 tid_state_tx[STA_TID_NUM];
151 struct tid_ampdu_tx *tid_tx[STA_TID_NUM];
152 u8 addba_req_num[STA_TID_NUM];
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200153 u8 dialog_token_allocator;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200154};
Jiri Bencf0706e822007-05-05 11:45:53 -0700155
Johannes Bergd0709a62008-02-25 16:27:46 +0100156
157/* see __sta_info_unlink */
158#define STA_INFO_PIN_STAT_NORMAL 0
159#define STA_INFO_PIN_STAT_PINNED 1
160#define STA_INFO_PIN_STAT_DESTROY 2
161
Johannes Berg693b1bb2008-02-25 16:27:48 +0100162/**
163 * struct sta_info - STA information
164 *
165 * This structure collects information about a station that
166 * mac80211 is communicating with.
167 *
168 * @list: global linked list entry
169 * @hnext: hash table linked list pointer
170 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200171 * @sdata: virtual interface this station belongs to
172 * @key: peer key negotiated with this station, if any
173 * @rate_ctrl: rate control algorithm reference
174 * @rate_ctrl_priv: rate control private per-STA pointer
175 * @last_tx_rate: rate used for last transmit, to report to userspace as
176 * "the" transmit rate
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700177 * @lock: used for locking all fields that require locking, see comments
178 * in the header file.
179 * @flaglock: spinlock for flags accesses
Johannes Berge25cf4a2008-10-23 08:51:20 +0200180 * @listen_interval: listen interval of this station, when we're acting as AP
181 * @pin_status: used internally for pinning a STA struct into memory
Johannes Berg693b1bb2008-02-25 16:27:48 +0100182 * @flags: STA flags, see &enum ieee80211_sta_info_flags
183 * @ps_tx_buf: buffer of frames to transmit to this station
184 * when it leaves power saving state
185 * @tx_filtered: buffer of frames we already tried to transmit
186 * but were filtered by hardware due to STA having entered
187 * power saving state
188 * @rx_packets: Number of MSDUs received from this STA
189 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200190 * @wep_weak_iv_count: number of weak WEP IVs received from this station
191 * @last_rx: time (in jiffies) when last frame was received from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700192 * @num_duplicates: number of duplicate frames received from this STA
193 * @rx_fragments: number of received MPDUs
194 * @rx_dropped: number of dropped MPDUs from this STA
195 * @last_signal: signal of last received frame from this STA
196 * @last_qual: qual of last received frame from this STA
197 * @last_noise: noise of last received frame from this STA
198 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200199 * @tx_filtered_count: number of frames the hardware filtered for this STA
200 * @tx_retry_failed: number of frames that failed retry
201 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700202 * @fail_avg: moving percentage of failed MSDUs
203 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200204 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700205 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200206 * @tid_seq: per-TID sequence numbers for sending to this STA
207 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700208 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700209 * @llid: Local link ID
210 * @plid: Peer link ID
211 * @reason: Cancel reason on PLINK_HOLDING state
212 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200213 * @ignore_plink_timer: ignore the peer-link timer (used internally)
214 * @plink_state: peer link state
215 * @plink_timeout: timeout of peer link
216 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200217 * @plink_timer_was_running: used by suspend/resume to restore timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700218 * @debugfs: debug filesystem info
Johannes Berg17741cd2008-09-11 00:02:02 +0200219 * @sta: station information we share with the driver
Johannes Berg693b1bb2008-02-25 16:27:48 +0100220 */
Jiri Bencf0706e822007-05-05 11:45:53 -0700221struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100222 /* General information, mostly static */
Jiri Bencf0706e822007-05-05 11:45:53 -0700223 struct list_head list;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100224 struct sta_info *hnext;
Jiri Bencf0706e822007-05-05 11:45:53 -0700225 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100226 struct ieee80211_sub_if_data *sdata;
Jiri Bencf0706e822007-05-05 11:45:53 -0700227 struct ieee80211_key *key;
Jiri Bencf0706e822007-05-05 11:45:53 -0700228 struct rate_control_ref *rate_ctrl;
229 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200230 spinlock_t lock;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200231 spinlock_t flaglock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200232
Jiri Bencf0706e822007-05-05 11:45:53 -0700233 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700234
Johannes Bergd0709a62008-02-25 16:27:46 +0100235 /*
236 * for use by the internal lifetime management,
237 * see __sta_info_unlink
238 */
239 u8 pin_status;
240
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200241 /*
242 * frequently updated, locked with own spinlock (flaglock),
243 * use the accessors defined below
244 */
Johannes Berg693b1bb2008-02-25 16:27:48 +0100245 u32 flags;
246
247 /*
248 * STA powersave frame queues, no more than the internal
249 * locking required.
250 */
251 struct sk_buff_head ps_tx_buf;
252 struct sk_buff_head tx_filtered;
253
254 /* Updated from RX path only, no locking requirements */
255 unsigned long rx_packets, rx_bytes;
256 unsigned long wep_weak_iv_count;
257 unsigned long last_rx;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700258 unsigned long num_duplicates;
259 unsigned long rx_fragments;
260 unsigned long rx_dropped;
261 int last_signal;
262 int last_qual;
263 int last_noise;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100264 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100265
266 /* Updated from TX status path only, no locking requirements */
267 unsigned long tx_filtered_count;
268 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100269 /* moving percentage of failed MSDUs */
270 unsigned int fail_avg;
271
272 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700273 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100274 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700275 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200276 struct ieee80211_tx_rate last_tx_rate;
Johannes Bergf591fa52008-07-10 11:21:26 +0200277 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100278
Johannes Berg693b1bb2008-02-25 16:27:48 +0100279 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200280 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100281 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200282 struct sta_ampdu_mlme ampdu_mlme;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700283 u8 timer_to_tid[STA_TID_NUM];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100284
Luis Carlos Coboee385852008-02-23 15:17:11 +0100285#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100286 /*
287 * Mesh peer link attributes
288 * TODO: move to a sub-structure that is referenced with pointer?
289 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700290 __le16 llid;
291 __le16 plid;
292 __le16 reason;
293 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100294 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200295 bool plink_timer_was_running;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100296 enum plink_state plink_state;
297 u32 plink_timeout;
298 struct timer_list plink_timer;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100299#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200300
Jiri Bence9f207f2007-05-05 11:46:38 -0700301#ifdef CONFIG_MAC80211_DEBUGFS
302 struct sta_info_debugfsdentries {
303 struct dentry *dir;
304 struct dentry *flags;
305 struct dentry *num_ps_buf_frames;
Jiri Bence9f207f2007-05-05 11:46:38 -0700306 struct dentry *inactive_ms;
307 struct dentry *last_seq_ctrl;
Ron Rindjunskyeb2ba622008-01-28 14:07:20 +0200308 struct dentry *agg_status;
Johannes Berg386aa232009-06-17 17:28:45 +0200309 struct dentry *aid;
310 struct dentry *dev;
311 struct dentry *rx_packets;
312 struct dentry *tx_packets;
313 struct dentry *rx_bytes;
314 struct dentry *tx_bytes;
315 struct dentry *rx_duplicates;
316 struct dentry *rx_fragments;
317 struct dentry *rx_dropped;
318 struct dentry *tx_fragments;
319 struct dentry *tx_filtered;
320 struct dentry *tx_retry_failed;
321 struct dentry *tx_retry_count;
322 struct dentry *last_signal;
323 struct dentry *last_qual;
324 struct dentry *last_noise;
325 struct dentry *wep_weak_iv_count;
Johannes Berg63044e92008-10-07 12:04:29 +0200326 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700327 } debugfs;
328#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200329
330 /* keep last! */
331 struct ieee80211_sta sta;
Jiri Bencf0706e822007-05-05 11:45:53 -0700332};
333
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100334static inline enum plink_state sta_plink_state(struct sta_info *sta)
335{
336#ifdef CONFIG_MAC80211_MESH
337 return sta->plink_state;
338#endif
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800339 return PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100340}
341
Johannes Berg07346f812008-05-03 01:02:02 +0200342static inline void set_sta_flags(struct sta_info *sta, const u32 flags)
343{
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200344 unsigned long irqfl;
345
346 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200347 sta->flags |= flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200348 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200349}
350
351static inline void clear_sta_flags(struct sta_info *sta, const u32 flags)
352{
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200353 unsigned long irqfl;
354
355 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200356 sta->flags &= ~flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200357 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200358}
359
Johannes Berg07346f812008-05-03 01:02:02 +0200360static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags)
361{
362 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200363 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200364
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200365 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200366 ret = sta->flags & flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200367 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200368
369 return ret;
370}
371
372static inline u32 test_and_clear_sta_flags(struct sta_info *sta,
373 const u32 flags)
374{
375 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200376 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200377
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200378 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200379 ret = sta->flags & flags;
380 sta->flags &= ~flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200381 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200382
383 return ret;
384}
385
386static inline u32 get_sta_flags(struct sta_info *sta)
387{
388 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200389 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200390
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200391 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200392 ret = sta->flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200393 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200394
395 return ret;
396}
397
Jiri Bencf0706e822007-05-05 11:45:53 -0700398
Jiri Bencf0706e822007-05-05 11:45:53 -0700399
400#define STA_HASH_SIZE 256
401#define STA_HASH(sta) (sta[5])
402
403
404/* Maximum number of frames to buffer per power saving station */
405#define STA_MAX_TX_BUFFER 128
406
407/* Minimum buffered frame expiry time. If STA uses listen interval that is
408 * smaller than this value, the minimum value here is used instead. */
409#define STA_TX_BUFFER_EXPIRE (10 * HZ)
410
411/* How often station data is cleaned up (e.g., expiration of buffered frames)
412 */
413#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
414
Johannes Bergd0709a62008-02-25 16:27:46 +0100415/*
416 * Get a STA info, must have be under RCU read lock.
417 */
Johannes Berg4b7679a2008-09-18 18:14:18 +0200418struct sta_info *sta_info_get(struct ieee80211_local *local, const u8 *addr);
Johannes Bergd0709a62008-02-25 16:27:46 +0100419/*
420 * Get STA info by index, BROKEN!
421 */
Luis Carlos Coboee385852008-02-23 15:17:11 +0100422struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx,
423 struct net_device *dev);
Johannes Bergd0709a62008-02-25 16:27:46 +0100424/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100425 * Create a new STA info, caller owns returned structure
426 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100427 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100428struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
429 u8 *addr, gfp_t gfp);
430/*
431 * Insert STA info into hash table/list, returns zero or a
432 * -EEXIST if (if the same MAC address is already present).
433 *
434 * Calling this without RCU protection makes the caller
435 * relinquish its reference to @sta.
436 */
437int sta_info_insert(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100438/*
439 * Unlink a STA info from the hash table/list.
440 * This can NULL the STA pointer if somebody else
441 * has already unlinked it.
442 */
443void sta_info_unlink(struct sta_info **sta);
444
445void sta_info_destroy(struct sta_info *sta);
446void sta_info_set_tim_bit(struct sta_info *sta);
447void sta_info_clear_tim_bit(struct sta_info *sta);
448
Jiri Bencf0706e822007-05-05 11:45:53 -0700449void sta_info_init(struct ieee80211_local *local);
450int sta_info_start(struct ieee80211_local *local);
451void sta_info_stop(struct ieee80211_local *local);
Johannes Berg44213b52008-02-25 16:27:49 +0100452int sta_info_flush(struct ieee80211_local *local,
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200453 struct ieee80211_sub_if_data *sdata);
Johannes Berg24723d12008-09-11 00:01:46 +0200454void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
455 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100456
Jiri Bencf0706e822007-05-05 11:45:53 -0700457#endif /* STA_INFO_H */