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Jiri Bencf0706e82007-05-05 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 Bergaf818582009-11-06 11:35:50 +010015#include <linux/workqueue.h>
Johannes Berg2c8dccc2008-04-08 15:14:40 -040016#include "key.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070017
Johannes Berg238814f2008-01-28 17:19:37 +010018/**
19 * enum ieee80211_sta_info_flags - Stations flags
20 *
21 * These flags are used with &struct sta_info's @flags member.
22 *
23 * @WLAN_STA_AUTH: Station is authenticated.
24 * @WLAN_STA_ASSOC: Station is associated.
Johannes Bergaf818582009-11-06 11:35:50 +010025 * @WLAN_STA_PS_STA: Station is in power-save mode
Johannes Berg238814f2008-01-28 17:19:37 +010026 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
27 * This bit is always checked so needs to be enabled for all stations
28 * when virtual port control is not in use.
29 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
30 * frames.
31 * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP.
32 * @WLAN_STA_WME: Station is a QoS-STA.
33 * @WLAN_STA_WDS: Station is one of our WDS peers.
Johannes Bergd46e1442008-02-20 23:59:33 +010034 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
Johannes Berge039fa42008-05-15 12:55:29 +020035 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
Johannes Bergd46e1442008-02-20 23:59:33 +010036 * frame to this station is transmitted.
Jouni Malinen5394af42009-01-08 13:31:59 +020037 * @WLAN_STA_MFP: Management frame protection is used with this STA.
Sujith722f0692009-03-17 08:50:06 +053038 * @WLAN_STA_SUSPEND: Set/cleared during a suspend/resume cycle.
39 * Used to deny ADDBA requests (both TX and RX).
Johannes Bergaf818582009-11-06 11:35:50 +010040 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
41 * power-save mode logically to flush frames that might still
42 * be in the queues
43 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
44 * station in power-save mode, reply when the driver unblocks.
Sujith4cad6c72010-02-10 14:52:21 +053045 * @WLAN_STA_DISASSOC: Disassociation in progress.
46 * This is used to reject TX BA session requests when disassociation
47 * is in progress.
Johannes Berg238814f2008-01-28 17:19:37 +010048 */
49enum ieee80211_sta_info_flags {
50 WLAN_STA_AUTH = 1<<0,
51 WLAN_STA_ASSOC = 1<<1,
Johannes Bergaf818582009-11-06 11:35:50 +010052 WLAN_STA_PS_STA = 1<<2,
Johannes Berg836341a2008-02-20 02:07:21 +010053 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,
Johannes Bergd46e1442008-02-20 23:59:33 +010058 WLAN_STA_CLEAR_PS_FILT = 1<<9,
Jouni Malinen5394af42009-01-08 13:31:59 +020059 WLAN_STA_MFP = 1<<10,
Johannes Bergaf818582009-11-06 11:35:50 +010060 WLAN_STA_SUSPEND = 1<<11,
61 WLAN_STA_PS_DRIVER = 1<<12,
62 WLAN_STA_PSPOLL = 1<<13,
Sujith4cad6c72010-02-10 14:52:21 +053063 WLAN_STA_DISASSOC = 1<<14,
Johannes Berg238814f2008-01-28 17:19:37 +010064};
Jiri Bencf0706e82007-05-05 11:45:53 -070065
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020066#define STA_TID_NUM 16
67#define ADDBA_RESP_INTERVAL HZ
Ron Rindjunsky80656c22008-01-28 14:07:16 +020068#define HT_AGG_MAX_RETRIES (0x3)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020069
70#define HT_AGG_STATE_INITIATOR_SHIFT (4)
71
Ron Rindjunsky80656c22008-01-28 14:07:16 +020072#define HT_ADDBA_REQUESTED_MSK BIT(0)
73#define HT_ADDBA_DRV_READY_MSK BIT(1)
74#define HT_ADDBA_RECEIVED_MSK BIT(2)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020075#define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3)
Ron Rindjunsky80656c22008-01-28 14:07:16 +020076#define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020077#define HT_AGG_STATE_IDLE (0x0)
Ron Rindjunsky80656c22008-01-28 14:07:16 +020078#define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
79 HT_ADDBA_DRV_READY_MSK | \
80 HT_ADDBA_RECEIVED_MSK)
81
82/**
83 * struct tid_ampdu_tx - TID aggregation information (Tx).
84 *
Ron Rindjunsky80656c22008-01-28 14:07:16 +020085 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +010086 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +020087 * @ssn: Starting Sequence Number expected to be aggregated.
88 * @dialog_token: dialog token for aggregation session
Ron Rindjunsky80656c22008-01-28 14:07:16 +020089 */
90struct tid_ampdu_tx {
Ron Rindjunsky80656c22008-01-28 14:07:16 +020091 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +010092 struct sk_buff_head pending;
Ron Rindjunskycee24a32008-03-26 20:36:03 +020093 u16 ssn;
94 u8 dialog_token;
Ron Rindjunsky80656c22008-01-28 14:07:16 +020095};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020096
97/**
98 * struct tid_ampdu_rx - TID aggregation information (Rx).
99 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200100 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +0300101 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200102 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Johannes Berg056cdd52008-03-26 23:21:47 +0100103 * @head_seq_num: head sequence number in reordering buffer.
104 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200105 * @ssn: Starting Sequence Number expected to be aggregated.
106 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +0100107 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200108 * @dialog_token: dialog token for aggregation session
Johannes Berg0a16ec52009-02-18 09:56:47 +0100109 * @shutdown: this session is being shut down due to STA removal
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200110 */
111struct tid_ampdu_rx {
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200112 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300113 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200114 struct timer_list session_timer;
Johannes Berg056cdd52008-03-26 23:21:47 +0100115 u16 head_seq_num;
116 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200117 u16 ssn;
118 u16 buf_size;
119 u16 timeout;
120 u8 dialog_token;
Johannes Berg55687e32009-02-10 21:25:51 +0100121 bool shutdown;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200122};
123
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800124/**
125 * enum plink_state - state of a mesh peer link finite state machine
126 *
127 * @PLINK_LISTEN: initial state, considered the implicit state of non existant
128 * mesh peer links
129 * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer
130 * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer
131 * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh
132 * peer
133 * @PLINK_ESTAB: mesh peer link is established
134 * @PLINK_HOLDING: mesh peer link is being closed or cancelled
135 * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded
136 */
Luis Carlos Coboee385852008-02-23 15:17:11 +0100137enum plink_state {
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800138 PLINK_LISTEN,
139 PLINK_OPN_SNT,
140 PLINK_OPN_RCVD,
141 PLINK_CNF_RCVD,
142 PLINK_ESTAB,
143 PLINK_HOLDING,
144 PLINK_BLOCKED
Luis Carlos Coboee385852008-02-23 15:17:11 +0100145};
Luis Carlos Coboee385852008-02-23 15:17:11 +0100146
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200147/**
148 * struct sta_ampdu_mlme - STA aggregation information.
149 *
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200150 * @tid_state_rx: TID's state in Rx session state machine.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200151 * @tid_rx: aggregation info for Rx per TID
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200152 * @tid_state_tx: TID's state in Tx session state machine.
153 * @tid_tx: aggregation info for Tx per TID
154 * @addba_req_num: number of times addBA request has been sent.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200155 * @dialog_token_allocator: dialog token enumerator for each new session;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200156 */
157struct sta_ampdu_mlme {
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200158 /* rx */
159 u8 tid_state_rx[STA_TID_NUM];
160 struct tid_ampdu_rx *tid_rx[STA_TID_NUM];
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200161 /* tx */
162 u8 tid_state_tx[STA_TID_NUM];
163 struct tid_ampdu_tx *tid_tx[STA_TID_NUM];
164 u8 addba_req_num[STA_TID_NUM];
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200165 u8 dialog_token_allocator;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200166};
Jiri Bencf0706e82007-05-05 11:45:53 -0700167
Johannes Bergd0709a62008-02-25 16:27:46 +0100168
Johannes Berg693b1bb2008-02-25 16:27:48 +0100169/**
170 * struct sta_info - STA information
171 *
172 * This structure collects information about a station that
173 * mac80211 is communicating with.
174 *
175 * @list: global linked list entry
176 * @hnext: hash table linked list pointer
177 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200178 * @sdata: virtual interface this station belongs to
179 * @key: peer key negotiated with this station, if any
180 * @rate_ctrl: rate control algorithm reference
181 * @rate_ctrl_priv: rate control private per-STA pointer
182 * @last_tx_rate: rate used for last transmit, to report to userspace as
183 * "the" transmit rate
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700184 * @lock: used for locking all fields that require locking, see comments
185 * in the header file.
186 * @flaglock: spinlock for flags accesses
Jaswinder Singh Rajput841507f2009-11-22 13:47:58 +0530187 * @drv_unblock_wk: used for driver PS unblocking
Johannes Berge25cf4a2008-10-23 08:51:20 +0200188 * @listen_interval: listen interval of this station, when we're acting as AP
Johannes Berg693b1bb2008-02-25 16:27:48 +0100189 * @flags: STA flags, see &enum ieee80211_sta_info_flags
190 * @ps_tx_buf: buffer of frames to transmit to this station
191 * when it leaves power saving state
192 * @tx_filtered: buffer of frames we already tried to transmit
193 * but were filtered by hardware due to STA having entered
194 * power saving state
195 * @rx_packets: Number of MSDUs received from this STA
196 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200197 * @wep_weak_iv_count: number of weak WEP IVs received from this station
198 * @last_rx: time (in jiffies) when last frame was received from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700199 * @num_duplicates: number of duplicate frames received from this STA
200 * @rx_fragments: number of received MPDUs
201 * @rx_dropped: number of dropped MPDUs from this STA
202 * @last_signal: signal of last received frame from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700203 * @last_noise: noise of last received frame from this STA
204 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200205 * @tx_filtered_count: number of frames the hardware filtered for this STA
206 * @tx_retry_failed: number of frames that failed retry
207 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700208 * @fail_avg: moving percentage of failed MSDUs
209 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200210 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700211 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200212 * @tid_seq: per-TID sequence numbers for sending to this STA
213 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700214 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700215 * @llid: Local link ID
216 * @plid: Peer link ID
217 * @reason: Cancel reason on PLINK_HOLDING state
218 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200219 * @ignore_plink_timer: ignore the peer-link timer (used internally)
220 * @plink_state: peer link state
221 * @plink_timeout: timeout of peer link
222 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200223 * @plink_timer_was_running: used by suspend/resume to restore timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700224 * @debugfs: debug filesystem info
Johannes Berg17741cd2008-09-11 00:02:02 +0200225 * @sta: station information we share with the driver
Johannes Bergaf818582009-11-06 11:35:50 +0100226 * @dead: set to true when sta is unlinked
Johannes Berg34e89502010-02-03 13:59:58 +0100227 * @uploaded: set to true when sta is uploaded to the driver
Johannes Berg693b1bb2008-02-25 16:27:48 +0100228 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700229struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100230 /* General information, mostly static */
Jiri Bencf0706e82007-05-05 11:45:53 -0700231 struct list_head list;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100232 struct sta_info *hnext;
Jiri Bencf0706e82007-05-05 11:45:53 -0700233 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100234 struct ieee80211_sub_if_data *sdata;
Jiri Bencf0706e82007-05-05 11:45:53 -0700235 struct ieee80211_key *key;
Jiri Bencf0706e82007-05-05 11:45:53 -0700236 struct rate_control_ref *rate_ctrl;
237 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200238 spinlock_t lock;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200239 spinlock_t flaglock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200240
Johannes Bergaf818582009-11-06 11:35:50 +0100241 struct work_struct drv_unblock_wk;
242
Jiri Bencf0706e82007-05-05 11:45:53 -0700243 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700244
Johannes Bergaf818582009-11-06 11:35:50 +0100245 bool dead;
246
Johannes Berg34e89502010-02-03 13:59:58 +0100247 bool uploaded;
Johannes Bergd0709a62008-02-25 16:27:46 +0100248
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200249 /*
250 * frequently updated, locked with own spinlock (flaglock),
251 * use the accessors defined below
252 */
Johannes Berg693b1bb2008-02-25 16:27:48 +0100253 u32 flags;
254
255 /*
256 * STA powersave frame queues, no more than the internal
257 * locking required.
258 */
259 struct sk_buff_head ps_tx_buf;
260 struct sk_buff_head tx_filtered;
261
262 /* Updated from RX path only, no locking requirements */
263 unsigned long rx_packets, rx_bytes;
264 unsigned long wep_weak_iv_count;
265 unsigned long last_rx;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700266 unsigned long num_duplicates;
267 unsigned long rx_fragments;
268 unsigned long rx_dropped;
269 int last_signal;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700270 int last_noise;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100271 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100272
273 /* Updated from TX status path only, no locking requirements */
274 unsigned long tx_filtered_count;
275 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100276 /* moving percentage of failed MSDUs */
277 unsigned int fail_avg;
278
279 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700280 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100281 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700282 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200283 struct ieee80211_tx_rate last_tx_rate;
Johannes Bergf591fa52008-07-10 11:21:26 +0200284 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100285
Johannes Berg693b1bb2008-02-25 16:27:48 +0100286 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200287 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100288 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200289 struct sta_ampdu_mlme ampdu_mlme;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700290 u8 timer_to_tid[STA_TID_NUM];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100291
Luis Carlos Coboee385852008-02-23 15:17:11 +0100292#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100293 /*
294 * Mesh peer link attributes
295 * TODO: move to a sub-structure that is referenced with pointer?
296 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700297 __le16 llid;
298 __le16 plid;
299 __le16 reason;
300 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100301 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200302 bool plink_timer_was_running;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100303 enum plink_state plink_state;
304 u32 plink_timeout;
305 struct timer_list plink_timer;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100306#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200307
Jiri Bence9f207f2007-05-05 11:46:38 -0700308#ifdef CONFIG_MAC80211_DEBUGFS
309 struct sta_info_debugfsdentries {
310 struct dentry *dir;
Johannes Berg63044e92008-10-07 12:04:29 +0200311 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700312 } debugfs;
313#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200314
315 /* keep last! */
316 struct ieee80211_sta sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700317};
318
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100319static inline enum plink_state sta_plink_state(struct sta_info *sta)
320{
321#ifdef CONFIG_MAC80211_MESH
322 return sta->plink_state;
323#endif
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800324 return PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100325}
326
Johannes Berg07346f812008-05-03 01:02:02 +0200327static inline void set_sta_flags(struct sta_info *sta, const u32 flags)
328{
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200329 unsigned long irqfl;
330
331 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200332 sta->flags |= flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200333 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200334}
335
336static inline void clear_sta_flags(struct sta_info *sta, const u32 flags)
337{
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200338 unsigned long irqfl;
339
340 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200341 sta->flags &= ~flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200342 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200343}
344
Johannes Berg07346f812008-05-03 01:02:02 +0200345static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags)
346{
347 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200348 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200349
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200350 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200351 ret = sta->flags & flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200352 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200353
354 return ret;
355}
356
357static inline u32 test_and_clear_sta_flags(struct sta_info *sta,
358 const u32 flags)
359{
360 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200361 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200362
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200363 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200364 ret = sta->flags & flags;
365 sta->flags &= ~flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200366 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200367
368 return ret;
369}
370
371static inline u32 get_sta_flags(struct sta_info *sta)
372{
373 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200374 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200375
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200376 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200377 ret = sta->flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200378 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200379
380 return ret;
381}
382
Jiri Bencf0706e82007-05-05 11:45:53 -0700383
Jiri Bencf0706e82007-05-05 11:45:53 -0700384
385#define STA_HASH_SIZE 256
386#define STA_HASH(sta) (sta[5])
387
388
389/* Maximum number of frames to buffer per power saving station */
390#define STA_MAX_TX_BUFFER 128
391
392/* Minimum buffered frame expiry time. If STA uses listen interval that is
393 * smaller than this value, the minimum value here is used instead. */
394#define STA_TX_BUFFER_EXPIRE (10 * HZ)
395
396/* How often station data is cleaned up (e.g., expiration of buffered frames)
397 */
398#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
399
Johannes Bergd0709a62008-02-25 16:27:46 +0100400/*
Johannes Bergabe60632009-11-25 17:46:18 +0100401 * Get a STA info, must be under RCU read lock.
Johannes Bergd0709a62008-02-25 16:27:46 +0100402 */
Johannes Bergabe60632009-11-25 17:46:18 +0100403struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
404 const u8 *addr);
405
Felix Fietkau0e5ded52010-01-08 18:10:58 +0100406struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
407 const u8 *addr);
408
Johannes Bergabe60632009-11-25 17:46:18 +0100409static inline
410void for_each_sta_info_type_check(struct ieee80211_local *local,
411 const u8 *addr,
412 struct sta_info *sta,
413 struct sta_info *nxt)
414{
415}
416
417#define for_each_sta_info(local, _addr, sta, nxt) \
418 for ( /* initialise loop */ \
419 sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
420 nxt = sta ? rcu_dereference(sta->hnext) : NULL; \
421 /* typecheck */ \
422 for_each_sta_info_type_check(local, (_addr), sta, nxt), \
423 /* continue condition */ \
424 sta; \
425 /* advance loop */ \
426 sta = nxt, \
427 nxt = sta ? rcu_dereference(sta->hnext) : NULL \
428 ) \
429 /* compare address and run code only if it matches */ \
430 if (memcmp(sta->sta.addr, (_addr), ETH_ALEN) == 0)
431
Johannes Bergd0709a62008-02-25 16:27:46 +0100432/*
433 * Get STA info by index, BROKEN!
434 */
Johannes Berg3b53fde82009-11-16 12:00:37 +0100435struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
436 int idx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100437/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100438 * Create a new STA info, caller owns returned structure
439 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100440 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100441struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
442 u8 *addr, gfp_t gfp);
443/*
444 * Insert STA info into hash table/list, returns zero or a
445 * -EEXIST if (if the same MAC address is already present).
446 *
Johannes Berg34e89502010-02-03 13:59:58 +0100447 * Calling the non-rcu version makes the caller relinquish,
448 * the _rcu version calls read_lock_rcu() and must be called
449 * without it held.
Johannes Berg73651ee2008-02-25 16:27:47 +0100450 */
451int sta_info_insert(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100452int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
453int sta_info_insert_atomic(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100454
Johannes Berg34e89502010-02-03 13:59:58 +0100455int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
456 const u8 *addr);
457int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
458 const u8 *addr);
459
Johannes Bergd0709a62008-02-25 16:27:46 +0100460void sta_info_set_tim_bit(struct sta_info *sta);
461void sta_info_clear_tim_bit(struct sta_info *sta);
462
Jiri Bencf0706e82007-05-05 11:45:53 -0700463void sta_info_init(struct ieee80211_local *local);
464int sta_info_start(struct ieee80211_local *local);
465void sta_info_stop(struct ieee80211_local *local);
Johannes Berg44213b52008-02-25 16:27:49 +0100466int sta_info_flush(struct ieee80211_local *local,
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200467 struct ieee80211_sub_if_data *sdata);
Johannes Berg24723d12008-09-11 00:01:46 +0200468void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
469 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100470
Johannes Bergaf818582009-11-06 11:35:50 +0100471void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
472void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
473
Jiri Bencf0706e82007-05-05 11:45:53 -0700474#endif /* STA_INFO_H */