blob: 6f77f12dc3fc313410964a91f318e48f1319d86c [file] [log] [blame]
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>
Bruno Randolf541a45a2010-12-02 19:12:43 +090016#include <linux/average.h>
Johannes Berg2c8dccc2008-04-08 15:14:40 -040017#include "key.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070018
Johannes Berg238814f2008-01-28 17:19:37 +010019/**
20 * enum ieee80211_sta_info_flags - Stations flags
21 *
Johannes Bergc2c98fd2011-09-29 16:04:36 +020022 * These flags are used with &struct sta_info's @flags member, but
23 * only indirectly with set_sta_flag() and friends.
Johannes Berg238814f2008-01-28 17:19:37 +010024 *
25 * @WLAN_STA_AUTH: Station is authenticated.
26 * @WLAN_STA_ASSOC: Station is associated.
Johannes Bergaf818582009-11-06 11:35:50 +010027 * @WLAN_STA_PS_STA: Station is in power-save mode
Johannes Berg238814f2008-01-28 17:19:37 +010028 * @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.
Johannes Berg238814f2008-01-28 17:19:37 +010033 * @WLAN_STA_WME: Station is a QoS-STA.
34 * @WLAN_STA_WDS: Station is one of our WDS peers.
Johannes Bergd46e1442008-02-20 23:59:33 +010035 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
Johannes Berge039fa42008-05-15 12:55:29 +020036 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
Johannes Bergd46e1442008-02-20 23:59:33 +010037 * frame to this station is transmitted.
Jouni Malinen5394af42009-01-08 13:31:59 +020038 * @WLAN_STA_MFP: Management frame protection is used with this STA.
Johannes Berg618f3562010-04-06 11:18:46 +020039 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
Johannes Berg098a6072010-04-06 11:18:47 +020040 * during suspend/resume and station removal.
Johannes Bergaf818582009-11-06 11:35:50 +010041 * @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.
Arik Nemtsov941c93c2011-09-28 14:12:54 +030046 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
47 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
48 * packets. This means the link is enabled.
Johannes Berg47086fc2011-09-29 16:04:33 +020049 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
50 * keeping station in power-save mode, reply when the driver
51 * unblocks the station.
52 * @WLAN_STA_SP: Station is in a service period, so don't try to
Johannes Bergdeeaee12011-09-29 16:04:35 +020053 * reply to other uAPSD trigger frames or PS-Poll.
Johannes Berge7f4a942011-11-04 11:18:20 +010054 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
Johannes Berg238814f2008-01-28 17:19:37 +010055 */
56enum ieee80211_sta_info_flags {
Johannes Bergc2c98fd2011-09-29 16:04:36 +020057 WLAN_STA_AUTH,
58 WLAN_STA_ASSOC,
59 WLAN_STA_PS_STA,
60 WLAN_STA_AUTHORIZED,
61 WLAN_STA_SHORT_PREAMBLE,
Johannes Bergc2c98fd2011-09-29 16:04:36 +020062 WLAN_STA_WME,
63 WLAN_STA_WDS,
64 WLAN_STA_CLEAR_PS_FILT,
65 WLAN_STA_MFP,
66 WLAN_STA_BLOCK_BA,
67 WLAN_STA_PS_DRIVER,
68 WLAN_STA_PSPOLL,
69 WLAN_STA_TDLS_PEER,
70 WLAN_STA_TDLS_PEER_AUTH,
71 WLAN_STA_UAPSD,
72 WLAN_STA_SP,
Johannes Berge7f4a942011-11-04 11:18:20 +010073 WLAN_STA_4ADDR_EVENT,
Johannes Berg238814f2008-01-28 17:19:37 +010074};
Jiri Bencf0706e82007-05-05 11:45:53 -070075
Johannes Bergd9a7ddb2011-12-14 12:35:30 +010076enum ieee80211_sta_state {
77 /* NOTE: These need to be ordered correctly! */
78 IEEE80211_STA_NONE,
79 IEEE80211_STA_AUTH,
80 IEEE80211_STA_ASSOC,
81 IEEE80211_STA_AUTHORIZED,
82};
83
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020084#define STA_TID_NUM 16
85#define ADDBA_RESP_INTERVAL HZ
Nikolay Martynov84381b42011-12-17 19:39:35 -050086#define HT_AGG_MAX_RETRIES 15
87#define HT_AGG_BURST_RETRIES 3
88#define HT_AGG_RETRIES_PERIOD (15 * HZ)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020089
Johannes Berga622ab72010-06-10 10:21:39 +020090#define HT_AGG_STATE_DRV_READY 0
91#define HT_AGG_STATE_RESPONSE_RECEIVED 1
92#define HT_AGG_STATE_OPERATIONAL 2
93#define HT_AGG_STATE_STOPPING 3
Johannes Berg0ab33702010-06-10 10:21:42 +020094#define HT_AGG_STATE_WANT_START 4
95#define HT_AGG_STATE_WANT_STOP 5
Ron Rindjunsky80656c22008-01-28 14:07:16 +020096
97/**
98 * struct tid_ampdu_tx - TID aggregation information (Tx).
99 *
Johannes Berga622ab72010-06-10 10:21:39 +0200100 * @rcu_head: rcu head for freeing structure
Nikolay Martynov285fa692011-11-22 21:50:28 -0500101 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200102 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100103 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200104 * @dialog_token: dialog token for aggregation session
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530105 * @timeout: session timeout value to be filled in ADDBA requests
Johannes Berga622ab72010-06-10 10:21:39 +0200106 * @state: session state (see above)
107 * @stop_initiator: initiator of a session stop
Johannes Berg53f73c02010-10-05 19:37:40 +0200108 * @tx_stop: TX DelBA frame when stopping
Johannes Berg0b01f032011-01-18 13:51:05 +0100109 * @buf_size: reorder buffer size at receiver
Felix Fietkauf0425be2011-08-28 21:11:01 +0200110 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
111 * @bar_pending: BAR needs to be re-sent
Johannes Berga622ab72010-06-10 10:21:39 +0200112 *
Johannes Bergdd318572010-11-29 11:09:16 +0100113 * This structure's lifetime is managed by RCU, assignments to
114 * the array holding it must hold the aggregation mutex.
115 *
116 * The TX path can access it under RCU lock-free if, and
117 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
118 * set. Otherwise, the TX path must also acquire the spinlock
119 * and re-check the state, see comments in the tx code
120 * touching it.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200121 */
122struct tid_ampdu_tx {
Johannes Berga622ab72010-06-10 10:21:39 +0200123 struct rcu_head rcu_head;
Nikolay Martynov285fa692011-11-22 21:50:28 -0500124 struct timer_list session_timer;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200125 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100126 struct sk_buff_head pending;
Johannes Berga622ab72010-06-10 10:21:39 +0200127 unsigned long state;
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530128 u16 timeout;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200129 u8 dialog_token;
Johannes Berga622ab72010-06-10 10:21:39 +0200130 u8 stop_initiator;
Johannes Berg53f73c02010-10-05 19:37:40 +0200131 bool tx_stop;
Johannes Berg0b01f032011-01-18 13:51:05 +0100132 u8 buf_size;
Felix Fietkauf0425be2011-08-28 21:11:01 +0200133
134 u16 failed_bar_ssn;
135 bool bar_pending;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200136};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200137
138/**
139 * struct tid_ampdu_rx - TID aggregation information (Rx).
140 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200141 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +0300142 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200143 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200144 * @reorder_timer: releases expired frames from the reorder buffer.
Johannes Berg056cdd52008-03-26 23:21:47 +0100145 * @head_seq_num: head sequence number in reordering buffer.
146 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200147 * @ssn: Starting Sequence Number expected to be aggregated.
148 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +0100149 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200150 * @dialog_token: dialog token for aggregation session
Johannes Berga87f7362010-06-10 10:21:38 +0200151 * @rcu_head: RCU head used for freeing this struct
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200152 * @reorder_lock: serializes access to reorder buffer, see below.
Johannes Berga87f7362010-06-10 10:21:38 +0200153 *
Johannes Bergdd318572010-11-29 11:09:16 +0100154 * This structure's lifetime is managed by RCU, assignments to
155 * the array holding it must hold the aggregation mutex.
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200156 *
Johannes Bergdd318572010-11-29 11:09:16 +0100157 * The @reorder_lock is used to protect the members of this
158 * struct, except for @timeout, @buf_size and @dialog_token,
159 * which are constant across the lifetime of the struct (the
160 * dialog token being used only for debugging).
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200161 */
162struct tid_ampdu_rx {
Johannes Berga87f7362010-06-10 10:21:38 +0200163 struct rcu_head rcu_head;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200164 spinlock_t reorder_lock;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200165 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300166 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200167 struct timer_list session_timer;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200168 struct timer_list reorder_timer;
Johannes Berg056cdd52008-03-26 23:21:47 +0100169 u16 head_seq_num;
170 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200171 u16 ssn;
172 u16 buf_size;
173 u16 timeout;
174 u8 dialog_token;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200175};
176
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800177/**
Johannes Bergfcea6002010-05-31 11:40:23 +0200178 * struct sta_ampdu_mlme - STA aggregation information.
179 *
Johannes Berga87f7362010-06-10 10:21:38 +0200180 * @tid_rx: aggregation info for Rx per TID -- RCU protected
Johannes Bergfcea6002010-05-31 11:40:23 +0200181 * @tid_tx: aggregation info for Tx per TID
Johannes Bergec034b22011-05-13 13:35:40 +0200182 * @tid_start_tx: sessions where start was requested
Johannes Bergfcea6002010-05-31 11:40:23 +0200183 * @addba_req_num: number of times addBA request has been sent.
Nikolay Martynov84381b42011-12-17 19:39:35 -0500184 * @last_addba_req_time: timestamp of the last addBA request.
Johannes Bergfcea6002010-05-31 11:40:23 +0200185 * @dialog_token_allocator: dialog token enumerator for each new session;
Johannes Berg0ab33702010-06-10 10:21:42 +0200186 * @work: work struct for starting/stopping aggregation
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200187 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
188 * RX timer expired until the work for it runs
Shahar Levif41ccd72011-05-22 16:10:21 +0300189 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
190 * driver requested to close until the work for it runs
Johannes Berga93e3642010-06-10 10:21:46 +0200191 * @mtx: mutex to protect all TX data (except non-NULL assignments
192 * to tid_tx[idx], which are protected by the sta spinlock)
Johannes Bergfcea6002010-05-31 11:40:23 +0200193 */
194struct sta_ampdu_mlme {
Johannes Berga93e3642010-06-10 10:21:46 +0200195 struct mutex mtx;
Johannes Bergfcea6002010-05-31 11:40:23 +0200196 /* rx */
Johannes Berg40b275b2011-05-13 14:15:49 +0200197 struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200198 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
Shahar Levif41ccd72011-05-22 16:10:21 +0300199 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)];
Johannes Bergfcea6002010-05-31 11:40:23 +0200200 /* tx */
Johannes Berg0ab33702010-06-10 10:21:42 +0200201 struct work_struct work;
Johannes Berg40b275b2011-05-13 14:15:49 +0200202 struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
Johannes Bergec034b22011-05-13 13:35:40 +0200203 struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
Nikolay Martynov84381b42011-12-17 19:39:35 -0500204 unsigned long last_addba_req_time[STA_TID_NUM];
Johannes Bergfcea6002010-05-31 11:40:23 +0200205 u8 addba_req_num[STA_TID_NUM];
206 u8 dialog_token_allocator;
207};
208
209
210/**
Johannes Berg693b1bb2008-02-25 16:27:48 +0100211 * struct sta_info - STA information
212 *
213 * This structure collects information about a station that
214 * mac80211 is communicating with.
215 *
216 * @list: global linked list entry
217 * @hnext: hash table linked list pointer
218 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200219 * @sdata: virtual interface this station belongs to
Johannes Berge31b8212010-10-05 19:39:30 +0200220 * @ptk: peer key negotiated with this station, if any
221 * @gtk: group keys negotiated with this station, if any
Johannes Berge25cf4a2008-10-23 08:51:20 +0200222 * @rate_ctrl: rate control algorithm reference
223 * @rate_ctrl_priv: rate control private per-STA pointer
224 * @last_tx_rate: rate used for last transmit, to report to userspace as
225 * "the" transmit rate
Felix Fietkau3af63342011-02-27 22:08:01 +0100226 * @last_rx_rate_idx: rx status rate index of the last data packet
227 * @last_rx_rate_flag: rx status flag of the last data packet
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700228 * @lock: used for locking all fields that require locking, see comments
229 * in the header file.
Jaswinder Singh Rajput841507f2009-11-22 13:47:58 +0530230 * @drv_unblock_wk: used for driver PS unblocking
Johannes Berge25cf4a2008-10-23 08:51:20 +0200231 * @listen_interval: listen interval of this station, when we're acting as AP
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200232 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
Johannes Berg948d8872011-09-29 16:04:29 +0200233 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
234 * when it leaves power saving state or polls
235 * @tx_filtered: buffers (per AC) of frames we already tried to
236 * transmit but were filtered by hardware due to STA having
237 * entered power saving state, these are also delivered to
238 * the station when it leaves powersave or polls for frames
239 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
Johannes Berg693b1bb2008-02-25 16:27:48 +0100240 * @rx_packets: Number of MSDUs received from this STA
241 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200242 * @wep_weak_iv_count: number of weak WEP IVs received from this station
243 * @last_rx: time (in jiffies) when last frame was received from this STA
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530244 * @last_connected: time (in seconds) when a station got connected
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700245 * @num_duplicates: number of duplicate frames received from this STA
246 * @rx_fragments: number of received MPDUs
247 * @rx_dropped: number of dropped MPDUs from this STA
248 * @last_signal: signal of last received frame from this STA
Bruno Randolf541a45a2010-12-02 19:12:43 +0900249 * @avg_signal: moving average of signal of received frames from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700250 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200251 * @tx_filtered_count: number of frames the hardware filtered for this STA
252 * @tx_retry_failed: number of frames that failed retry
253 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700254 * @fail_avg: moving percentage of failed MSDUs
255 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200256 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700257 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200258 * @tid_seq: per-TID sequence numbers for sending to this STA
259 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700260 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700261 * @llid: Local link ID
262 * @plid: Peer link ID
263 * @reason: Cancel reason on PLINK_HOLDING state
264 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200265 * @ignore_plink_timer: ignore the peer-link timer (used internally)
266 * @plink_state: peer link state
267 * @plink_timeout: timeout of peer link
268 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200269 * @plink_timer_was_running: used by suspend/resume to restore timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700270 * @debugfs: debug filesystem info
Johannes Bergaf818582009-11-06 11:35:50 +0100271 * @dead: set to true when sta is unlinked
Johannes Berg34e89502010-02-03 13:59:58 +0100272 * @uploaded: set to true when sta is uploaded to the driver
Johannes Berg99ba2a12010-11-24 08:10:06 +0100273 * @lost_packets: number of consecutive lost packets
Guy Eilam2a33bee2011-08-17 15:18:15 +0300274 * @dummy: indicate a dummy station created for receiving
275 * EAP frames before association
276 * @sta: station information we share with the driver
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100277 * @sta_state: duplicates information about station state (for debug)
Paul Stewarta85e1d52011-12-09 11:01:49 -0800278 * @beacon_loss_count: number of times beacon loss has triggered
Johannes Berg693b1bb2008-02-25 16:27:48 +0100279 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700280struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100281 /* General information, mostly static */
Jiri Bencf0706e82007-05-05 11:45:53 -0700282 struct list_head list;
Johannes Berg40b275b2011-05-13 14:15:49 +0200283 struct sta_info __rcu *hnext;
Jiri Bencf0706e82007-05-05 11:45:53 -0700284 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100285 struct ieee80211_sub_if_data *sdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200286 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
287 struct ieee80211_key __rcu *ptk;
Jiri Bencf0706e82007-05-05 11:45:53 -0700288 struct rate_control_ref *rate_ctrl;
289 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200290 spinlock_t lock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200291
Johannes Bergaf818582009-11-06 11:35:50 +0100292 struct work_struct drv_unblock_wk;
293
Jiri Bencf0706e82007-05-05 11:45:53 -0700294 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700295
Johannes Bergaf818582009-11-06 11:35:50 +0100296 bool dead;
297
Johannes Berg34e89502010-02-03 13:59:58 +0100298 bool uploaded;
Johannes Bergd0709a62008-02-25 16:27:46 +0100299
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100300 enum ieee80211_sta_state sta_state;
301
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200302 /* use the accessors defined below */
303 unsigned long _flags;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100304
305 /*
306 * STA powersave frame queues, no more than the internal
307 * locking required.
308 */
Johannes Berg948d8872011-09-29 16:04:29 +0200309 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
310 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
311 unsigned long driver_buffered_tids;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100312
313 /* Updated from RX path only, no locking requirements */
314 unsigned long rx_packets, rx_bytes;
315 unsigned long wep_weak_iv_count;
316 unsigned long last_rx;
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530317 long last_connected;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700318 unsigned long num_duplicates;
319 unsigned long rx_fragments;
320 unsigned long rx_dropped;
321 int last_signal;
Bruno Randolf541a45a2010-12-02 19:12:43 +0900322 struct ewma avg_signal;
Johannes Berg9e262972011-07-07 18:45:03 +0200323 /* Plus 1 for non-QoS frames */
324 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100325
326 /* Updated from TX status path only, no locking requirements */
327 unsigned long tx_filtered_count;
328 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100329 /* moving percentage of failed MSDUs */
330 unsigned int fail_avg;
331
332 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700333 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100334 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700335 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200336 struct ieee80211_tx_rate last_tx_rate;
Felix Fietkau3af63342011-02-27 22:08:01 +0100337 int last_rx_rate_idx;
338 int last_rx_rate_flag;
Johannes Bergf591fa52008-07-10 11:21:26 +0200339 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100340
Johannes Berg693b1bb2008-02-25 16:27:48 +0100341 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200342 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100343 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200344 struct sta_ampdu_mlme ampdu_mlme;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700345 u8 timer_to_tid[STA_TID_NUM];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100346
Luis Carlos Coboee385852008-02-23 15:17:11 +0100347#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100348 /*
349 * Mesh peer link attributes
350 * TODO: move to a sub-structure that is referenced with pointer?
351 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700352 __le16 llid;
353 __le16 plid;
354 __le16 reason;
355 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100356 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200357 bool plink_timer_was_running;
Javier Cardona57cf8042011-05-13 10:45:43 -0700358 enum nl80211_plink_state plink_state;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100359 u32 plink_timeout;
360 struct timer_list plink_timer;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100361#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200362
Jiri Bence9f207f2007-05-05 11:46:38 -0700363#ifdef CONFIG_MAC80211_DEBUGFS
364 struct sta_info_debugfsdentries {
365 struct dentry *dir;
Johannes Berg63044e92008-10-07 12:04:29 +0200366 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700367 } debugfs;
368#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200369
Johannes Berg99ba2a12010-11-24 08:10:06 +0100370 unsigned int lost_packets;
Paul Stewarta85e1d52011-12-09 11:01:49 -0800371 unsigned int beacon_loss_count;
Johannes Berg99ba2a12010-11-24 08:10:06 +0100372
Guy Eilam2a33bee2011-08-17 15:18:15 +0300373 /* should be right in front of sta to be in the same cache line */
374 bool dummy;
375
Johannes Berg17741cd2008-09-11 00:02:02 +0200376 /* keep last! */
377 struct ieee80211_sta sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700378};
379
Javier Cardona57cf8042011-05-13 10:45:43 -0700380static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100381{
382#ifdef CONFIG_MAC80211_MESH
383 return sta->plink_state;
384#endif
Javier Cardona57cf8042011-05-13 10:45:43 -0700385 return NL80211_PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100386}
387
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200388static inline void set_sta_flag(struct sta_info *sta,
389 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200390{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100391 WARN_ON(flag == WLAN_STA_AUTH ||
392 flag == WLAN_STA_ASSOC ||
393 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200394 set_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200395}
396
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200397static inline void clear_sta_flag(struct sta_info *sta,
398 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200399{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100400 WARN_ON(flag == WLAN_STA_AUTH ||
401 flag == WLAN_STA_ASSOC ||
402 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200403 clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200404}
405
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200406static inline int test_sta_flag(struct sta_info *sta,
407 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200408{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200409 return test_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200410}
411
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200412static inline int test_and_clear_sta_flag(struct sta_info *sta,
413 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200414{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100415 WARN_ON(flag == WLAN_STA_AUTH ||
416 flag == WLAN_STA_ASSOC ||
417 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200418 return test_and_clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200419}
420
Johannes Berge7f4a942011-11-04 11:18:20 +0100421static inline int test_and_set_sta_flag(struct sta_info *sta,
422 enum ieee80211_sta_info_flags flag)
423{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100424 WARN_ON(flag == WLAN_STA_AUTH ||
425 flag == WLAN_STA_ASSOC ||
426 flag == WLAN_STA_AUTHORIZED);
Johannes Berge7f4a942011-11-04 11:18:20 +0100427 return test_and_set_bit(flag, &sta->_flags);
428}
429
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100430int sta_info_move_state_checked(struct sta_info *sta,
431 enum ieee80211_sta_state new_state);
432
433static inline void sta_info_move_state(struct sta_info *sta,
434 enum ieee80211_sta_state new_state)
435{
436 int ret = sta_info_move_state_checked(sta, new_state);
437 WARN_ON_ONCE(ret);
438}
439
440
Johannes Bergec034b22011-05-13 13:35:40 +0200441void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
442 struct tid_ampdu_tx *tid_tx);
Jiri Bencf0706e82007-05-05 11:45:53 -0700443
Johannes Berg40b275b2011-05-13 14:15:49 +0200444static inline struct tid_ampdu_tx *
445rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
446{
447 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
448 lockdep_is_held(&sta->lock) ||
449 lockdep_is_held(&sta->ampdu_mlme.mtx));
450}
Jiri Bencf0706e82007-05-05 11:45:53 -0700451
452#define STA_HASH_SIZE 256
453#define STA_HASH(sta) (sta[5])
454
455
Johannes Berg948d8872011-09-29 16:04:29 +0200456/* Maximum number of frames to buffer per power saving station per AC */
457#define STA_MAX_TX_BUFFER 64
Jiri Bencf0706e82007-05-05 11:45:53 -0700458
459/* Minimum buffered frame expiry time. If STA uses listen interval that is
460 * smaller than this value, the minimum value here is used instead. */
461#define STA_TX_BUFFER_EXPIRE (10 * HZ)
462
463/* How often station data is cleaned up (e.g., expiration of buffered frames)
464 */
465#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
466
Johannes Bergd0709a62008-02-25 16:27:46 +0100467/*
Johannes Bergabe60632009-11-25 17:46:18 +0100468 * Get a STA info, must be under RCU read lock.
Johannes Bergd0709a62008-02-25 16:27:46 +0100469 */
Johannes Bergabe60632009-11-25 17:46:18 +0100470struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
471 const u8 *addr);
472
Guy Eilam2a33bee2011-08-17 15:18:15 +0300473struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata,
474 const u8 *addr);
475
Felix Fietkau0e5ded52010-01-08 18:10:58 +0100476struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
477 const u8 *addr);
478
Guy Eilam2a33bee2011-08-17 15:18:15 +0300479struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata,
480 const u8 *addr);
481
Johannes Bergabe60632009-11-25 17:46:18 +0100482static inline
483void for_each_sta_info_type_check(struct ieee80211_local *local,
484 const u8 *addr,
485 struct sta_info *sta,
486 struct sta_info *nxt)
487{
488}
489
Felix Fietkau38bdb652010-06-25 01:44:33 +0200490#define for_each_sta_info(local, _addr, _sta, nxt) \
Johannes Bergabe60632009-11-25 17:46:18 +0100491 for ( /* initialise loop */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200492 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
493 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
Johannes Bergabe60632009-11-25 17:46:18 +0100494 /* typecheck */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200495 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
Johannes Bergabe60632009-11-25 17:46:18 +0100496 /* continue condition */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200497 _sta; \
Johannes Bergabe60632009-11-25 17:46:18 +0100498 /* advance loop */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200499 _sta = nxt, \
500 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
Johannes Bergabe60632009-11-25 17:46:18 +0100501 ) \
Guy Eilam2a33bee2011-08-17 15:18:15 +0300502 /* run code only if address matches and it's not a dummy sta */ \
503 if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \
504 !_sta->dummy)
505
506#define for_each_sta_info_rx(local, _addr, _sta, nxt) \
507 for ( /* initialise loop */ \
508 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
509 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
510 /* typecheck */ \
511 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
512 /* continue condition */ \
513 _sta; \
514 /* advance loop */ \
515 _sta = nxt, \
516 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
517 ) \
Johannes Bergabe60632009-11-25 17:46:18 +0100518 /* compare address and run code only if it matches */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200519 if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0)
Johannes Bergabe60632009-11-25 17:46:18 +0100520
Johannes Bergd0709a62008-02-25 16:27:46 +0100521/*
522 * Get STA info by index, BROKEN!
523 */
Johannes Berg3b53fde82009-11-16 12:00:37 +0100524struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
525 int idx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100526/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100527 * Create a new STA info, caller owns returned structure
528 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100529 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100530struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
Johannes Berg56544162011-12-14 13:28:46 +0100531 const u8 *addr, gfp_t gfp);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100532
533void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
534
Johannes Berg73651ee2008-02-25 16:27:47 +0100535/*
536 * Insert STA info into hash table/list, returns zero or a
537 * -EEXIST if (if the same MAC address is already present).
538 *
Johannes Berg34e89502010-02-03 13:59:58 +0100539 * Calling the non-rcu version makes the caller relinquish,
540 * the _rcu version calls read_lock_rcu() and must be called
541 * without it held.
Johannes Berg73651ee2008-02-25 16:27:47 +0100542 */
543int sta_info_insert(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100544int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
Guy Eilam2a33bee2011-08-17 15:18:15 +0300545int sta_info_reinsert(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100546
Johannes Berg34e89502010-02-03 13:59:58 +0100547int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
548 const u8 *addr);
549int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
550 const u8 *addr);
551
Johannes Bergc868cb352011-09-29 16:04:27 +0200552void sta_info_recalc_tim(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100553
Jiri Bencf0706e82007-05-05 11:45:53 -0700554void sta_info_init(struct ieee80211_local *local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700555void sta_info_stop(struct ieee80211_local *local);
Johannes Berg44213b52008-02-25 16:27:49 +0100556int sta_info_flush(struct ieee80211_local *local,
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200557 struct ieee80211_sub_if_data *sdata);
Johannes Berg24723d12008-09-11 00:01:46 +0200558void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
559 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100560
Johannes Bergaf818582009-11-06 11:35:50 +0100561void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
562void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
Johannes Berg47086fc2011-09-29 16:04:33 +0200563void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
Johannes Bergaf818582009-11-06 11:35:50 +0100564
Jiri Bencf0706e82007-05-05 11:45:53 -0700565#endif /* STA_INFO_H */