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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>
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.
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.
Johannes Bergd46e1442008-02-20 23:59:33 +010036 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
Johannes Berge039fa42008-05-15 12:55:29 +020037 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
Johannes Bergd46e1442008-02-20 23:59:33 +010038 * frame to this station is transmitted.
Jouni Malinen5394af42009-01-08 13:31:59 +020039 * @WLAN_STA_MFP: Management frame protection is used with this STA.
Johannes Berg618f3562010-04-06 11:18:46 +020040 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
Johannes Berg098a6072010-04-06 11:18:47 +020041 * during suspend/resume and station removal.
Johannes Bergaf818582009-11-06 11:35:50 +010042 * @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.
Arik Nemtsov941c93c2011-09-28 14:12:54 +030047 * @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.
Johannes Berg47086fc2011-09-29 16:04:33 +020050 * @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
Johannes Bergdeeaee12011-09-29 16:04:35 +020054 * reply to other uAPSD trigger frames or PS-Poll.
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,
62 WLAN_STA_ASSOC_AP,
63 WLAN_STA_WME,
64 WLAN_STA_WDS,
65 WLAN_STA_CLEAR_PS_FILT,
66 WLAN_STA_MFP,
67 WLAN_STA_BLOCK_BA,
68 WLAN_STA_PS_DRIVER,
69 WLAN_STA_PSPOLL,
70 WLAN_STA_TDLS_PEER,
71 WLAN_STA_TDLS_PEER_AUTH,
72 WLAN_STA_UAPSD,
73 WLAN_STA_SP,
Johannes Berg238814f2008-01-28 17:19:37 +010074};
Jiri Bencf0706e82007-05-05 11:45:53 -070075
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020076#define STA_TID_NUM 16
77#define ADDBA_RESP_INTERVAL HZ
Johannes Berga622ab72010-06-10 10:21:39 +020078#define HT_AGG_MAX_RETRIES 0x3
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020079
Johannes Berga622ab72010-06-10 10:21:39 +020080#define HT_AGG_STATE_DRV_READY 0
81#define HT_AGG_STATE_RESPONSE_RECEIVED 1
82#define HT_AGG_STATE_OPERATIONAL 2
83#define HT_AGG_STATE_STOPPING 3
Johannes Berg0ab33702010-06-10 10:21:42 +020084#define HT_AGG_STATE_WANT_START 4
85#define HT_AGG_STATE_WANT_STOP 5
Ron Rindjunsky80656c22008-01-28 14:07:16 +020086
87/**
88 * struct tid_ampdu_tx - TID aggregation information (Tx).
89 *
Johannes Berga622ab72010-06-10 10:21:39 +020090 * @rcu_head: rcu head for freeing structure
Ron Rindjunsky80656c22008-01-28 14:07:16 +020091 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +010092 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +020093 * @dialog_token: dialog token for aggregation session
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +053094 * @timeout: session timeout value to be filled in ADDBA requests
Johannes Berga622ab72010-06-10 10:21:39 +020095 * @state: session state (see above)
96 * @stop_initiator: initiator of a session stop
Johannes Berg53f73c02010-10-05 19:37:40 +020097 * @tx_stop: TX DelBA frame when stopping
Johannes Berg0b01f032011-01-18 13:51:05 +010098 * @buf_size: reorder buffer size at receiver
Felix Fietkauf0425be2011-08-28 21:11:01 +020099 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
100 * @bar_pending: BAR needs to be re-sent
Johannes Berga622ab72010-06-10 10:21:39 +0200101 *
Johannes Bergdd318572010-11-29 11:09:16 +0100102 * This structure's lifetime is managed by RCU, assignments to
103 * the array holding it must hold the aggregation mutex.
104 *
105 * The TX path can access it under RCU lock-free if, and
106 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
107 * set. Otherwise, the TX path must also acquire the spinlock
108 * and re-check the state, see comments in the tx code
109 * touching it.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200110 */
111struct tid_ampdu_tx {
Johannes Berga622ab72010-06-10 10:21:39 +0200112 struct rcu_head rcu_head;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200113 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100114 struct sk_buff_head pending;
Johannes Berga622ab72010-06-10 10:21:39 +0200115 unsigned long state;
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530116 u16 timeout;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200117 u8 dialog_token;
Johannes Berga622ab72010-06-10 10:21:39 +0200118 u8 stop_initiator;
Johannes Berg53f73c02010-10-05 19:37:40 +0200119 bool tx_stop;
Johannes Berg0b01f032011-01-18 13:51:05 +0100120 u8 buf_size;
Felix Fietkauf0425be2011-08-28 21:11:01 +0200121
122 u16 failed_bar_ssn;
123 bool bar_pending;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200124};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200125
126/**
127 * struct tid_ampdu_rx - TID aggregation information (Rx).
128 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200129 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +0300130 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200131 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200132 * @reorder_timer: releases expired frames from the reorder buffer.
Johannes Berg056cdd52008-03-26 23:21:47 +0100133 * @head_seq_num: head sequence number in reordering buffer.
134 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200135 * @ssn: Starting Sequence Number expected to be aggregated.
136 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +0100137 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200138 * @dialog_token: dialog token for aggregation session
Johannes Berga87f7362010-06-10 10:21:38 +0200139 * @rcu_head: RCU head used for freeing this struct
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200140 * @reorder_lock: serializes access to reorder buffer, see below.
Johannes Berga87f7362010-06-10 10:21:38 +0200141 *
Johannes Bergdd318572010-11-29 11:09:16 +0100142 * This structure's lifetime is managed by RCU, assignments to
143 * the array holding it must hold the aggregation mutex.
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200144 *
Johannes Bergdd318572010-11-29 11:09:16 +0100145 * The @reorder_lock is used to protect the members of this
146 * struct, except for @timeout, @buf_size and @dialog_token,
147 * which are constant across the lifetime of the struct (the
148 * dialog token being used only for debugging).
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200149 */
150struct tid_ampdu_rx {
Johannes Berga87f7362010-06-10 10:21:38 +0200151 struct rcu_head rcu_head;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200152 spinlock_t reorder_lock;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200153 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300154 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200155 struct timer_list session_timer;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200156 struct timer_list reorder_timer;
Johannes Berg056cdd52008-03-26 23:21:47 +0100157 u16 head_seq_num;
158 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200159 u16 ssn;
160 u16 buf_size;
161 u16 timeout;
162 u8 dialog_token;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200163};
164
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800165/**
Johannes Bergfcea6002010-05-31 11:40:23 +0200166 * struct sta_ampdu_mlme - STA aggregation information.
167 *
Johannes Berga87f7362010-06-10 10:21:38 +0200168 * @tid_rx: aggregation info for Rx per TID -- RCU protected
Johannes Bergfcea6002010-05-31 11:40:23 +0200169 * @tid_tx: aggregation info for Tx per TID
Johannes Bergec034b22011-05-13 13:35:40 +0200170 * @tid_start_tx: sessions where start was requested
Johannes Bergfcea6002010-05-31 11:40:23 +0200171 * @addba_req_num: number of times addBA request has been sent.
172 * @dialog_token_allocator: dialog token enumerator for each new session;
Johannes Berg0ab33702010-06-10 10:21:42 +0200173 * @work: work struct for starting/stopping aggregation
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200174 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
175 * RX timer expired until the work for it runs
Shahar Levif41ccd72011-05-22 16:10:21 +0300176 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
177 * driver requested to close until the work for it runs
Johannes Berga93e3642010-06-10 10:21:46 +0200178 * @mtx: mutex to protect all TX data (except non-NULL assignments
179 * to tid_tx[idx], which are protected by the sta spinlock)
Johannes Bergfcea6002010-05-31 11:40:23 +0200180 */
181struct sta_ampdu_mlme {
Johannes Berga93e3642010-06-10 10:21:46 +0200182 struct mutex mtx;
Johannes Bergfcea6002010-05-31 11:40:23 +0200183 /* rx */
Johannes Berg40b275b2011-05-13 14:15:49 +0200184 struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200185 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
Shahar Levif41ccd72011-05-22 16:10:21 +0300186 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)];
Johannes Bergfcea6002010-05-31 11:40:23 +0200187 /* tx */
Johannes Berg0ab33702010-06-10 10:21:42 +0200188 struct work_struct work;
Johannes Berg40b275b2011-05-13 14:15:49 +0200189 struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
Johannes Bergec034b22011-05-13 13:35:40 +0200190 struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
Johannes Bergfcea6002010-05-31 11:40:23 +0200191 u8 addba_req_num[STA_TID_NUM];
192 u8 dialog_token_allocator;
193};
194
195
196/**
Johannes Berg693b1bb2008-02-25 16:27:48 +0100197 * struct sta_info - STA information
198 *
199 * This structure collects information about a station that
200 * mac80211 is communicating with.
201 *
202 * @list: global linked list entry
203 * @hnext: hash table linked list pointer
204 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200205 * @sdata: virtual interface this station belongs to
Johannes Berge31b8212010-10-05 19:39:30 +0200206 * @ptk: peer key negotiated with this station, if any
207 * @gtk: group keys negotiated with this station, if any
Johannes Berge25cf4a2008-10-23 08:51:20 +0200208 * @rate_ctrl: rate control algorithm reference
209 * @rate_ctrl_priv: rate control private per-STA pointer
210 * @last_tx_rate: rate used for last transmit, to report to userspace as
211 * "the" transmit rate
Felix Fietkau3af63342011-02-27 22:08:01 +0100212 * @last_rx_rate_idx: rx status rate index of the last data packet
213 * @last_rx_rate_flag: rx status flag of the last data packet
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700214 * @lock: used for locking all fields that require locking, see comments
215 * in the header file.
Jaswinder Singh Rajput841507f2009-11-22 13:47:58 +0530216 * @drv_unblock_wk: used for driver PS unblocking
Johannes Berge25cf4a2008-10-23 08:51:20 +0200217 * @listen_interval: listen interval of this station, when we're acting as AP
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200218 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
Johannes Berg948d8872011-09-29 16:04:29 +0200219 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
220 * when it leaves power saving state or polls
221 * @tx_filtered: buffers (per AC) of frames we already tried to
222 * transmit but were filtered by hardware due to STA having
223 * entered power saving state, these are also delivered to
224 * the station when it leaves powersave or polls for frames
225 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
Johannes Berg693b1bb2008-02-25 16:27:48 +0100226 * @rx_packets: Number of MSDUs received from this STA
227 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200228 * @wep_weak_iv_count: number of weak WEP IVs received from this station
229 * @last_rx: time (in jiffies) when last frame was received from this STA
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530230 * @last_connected: time (in seconds) when a station got connected
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700231 * @num_duplicates: number of duplicate frames received from this STA
232 * @rx_fragments: number of received MPDUs
233 * @rx_dropped: number of dropped MPDUs from this STA
234 * @last_signal: signal of last received frame from this STA
Bruno Randolf541a45a2010-12-02 19:12:43 +0900235 * @avg_signal: moving average of signal of received frames from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700236 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200237 * @tx_filtered_count: number of frames the hardware filtered for this STA
238 * @tx_retry_failed: number of frames that failed retry
239 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700240 * @fail_avg: moving percentage of failed MSDUs
241 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200242 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700243 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200244 * @tid_seq: per-TID sequence numbers for sending to this STA
245 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700246 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700247 * @llid: Local link ID
248 * @plid: Peer link ID
249 * @reason: Cancel reason on PLINK_HOLDING state
250 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200251 * @ignore_plink_timer: ignore the peer-link timer (used internally)
252 * @plink_state: peer link state
253 * @plink_timeout: timeout of peer link
254 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200255 * @plink_timer_was_running: used by suspend/resume to restore timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700256 * @debugfs: debug filesystem info
Johannes Bergaf818582009-11-06 11:35:50 +0100257 * @dead: set to true when sta is unlinked
Johannes Berg34e89502010-02-03 13:59:58 +0100258 * @uploaded: set to true when sta is uploaded to the driver
Johannes Berg99ba2a12010-11-24 08:10:06 +0100259 * @lost_packets: number of consecutive lost packets
Guy Eilam2a33bee2011-08-17 15:18:15 +0300260 * @dummy: indicate a dummy station created for receiving
261 * EAP frames before association
262 * @sta: station information we share with the driver
Johannes Berg693b1bb2008-02-25 16:27:48 +0100263 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700264struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100265 /* General information, mostly static */
Jiri Bencf0706e82007-05-05 11:45:53 -0700266 struct list_head list;
Johannes Berg40b275b2011-05-13 14:15:49 +0200267 struct sta_info __rcu *hnext;
Jiri Bencf0706e82007-05-05 11:45:53 -0700268 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100269 struct ieee80211_sub_if_data *sdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200270 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
271 struct ieee80211_key __rcu *ptk;
Jiri Bencf0706e82007-05-05 11:45:53 -0700272 struct rate_control_ref *rate_ctrl;
273 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200274 spinlock_t lock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200275
Johannes Bergaf818582009-11-06 11:35:50 +0100276 struct work_struct drv_unblock_wk;
277
Jiri Bencf0706e82007-05-05 11:45:53 -0700278 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700279
Johannes Bergaf818582009-11-06 11:35:50 +0100280 bool dead;
281
Johannes Berg34e89502010-02-03 13:59:58 +0100282 bool uploaded;
Johannes Bergd0709a62008-02-25 16:27:46 +0100283
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200284 /* use the accessors defined below */
285 unsigned long _flags;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100286
287 /*
288 * STA powersave frame queues, no more than the internal
289 * locking required.
290 */
Johannes Berg948d8872011-09-29 16:04:29 +0200291 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
292 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
293 unsigned long driver_buffered_tids;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100294
295 /* Updated from RX path only, no locking requirements */
296 unsigned long rx_packets, rx_bytes;
297 unsigned long wep_weak_iv_count;
298 unsigned long last_rx;
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530299 long last_connected;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700300 unsigned long num_duplicates;
301 unsigned long rx_fragments;
302 unsigned long rx_dropped;
303 int last_signal;
Bruno Randolf541a45a2010-12-02 19:12:43 +0900304 struct ewma avg_signal;
Johannes Berg9e262972011-07-07 18:45:03 +0200305 /* Plus 1 for non-QoS frames */
306 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100307
308 /* Updated from TX status path only, no locking requirements */
309 unsigned long tx_filtered_count;
310 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100311 /* moving percentage of failed MSDUs */
312 unsigned int fail_avg;
313
314 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700315 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100316 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700317 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200318 struct ieee80211_tx_rate last_tx_rate;
Felix Fietkau3af63342011-02-27 22:08:01 +0100319 int last_rx_rate_idx;
320 int last_rx_rate_flag;
Johannes Bergf591fa52008-07-10 11:21:26 +0200321 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100322
Johannes Berg693b1bb2008-02-25 16:27:48 +0100323 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200324 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100325 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200326 struct sta_ampdu_mlme ampdu_mlme;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700327 u8 timer_to_tid[STA_TID_NUM];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100328
Luis Carlos Coboee385852008-02-23 15:17:11 +0100329#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100330 /*
331 * Mesh peer link attributes
332 * TODO: move to a sub-structure that is referenced with pointer?
333 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700334 __le16 llid;
335 __le16 plid;
336 __le16 reason;
337 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100338 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200339 bool plink_timer_was_running;
Javier Cardona57cf8042011-05-13 10:45:43 -0700340 enum nl80211_plink_state plink_state;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100341 u32 plink_timeout;
342 struct timer_list plink_timer;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100343#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200344
Jiri Bence9f207f2007-05-05 11:46:38 -0700345#ifdef CONFIG_MAC80211_DEBUGFS
346 struct sta_info_debugfsdentries {
347 struct dentry *dir;
Johannes Berg63044e92008-10-07 12:04:29 +0200348 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700349 } debugfs;
350#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200351
Johannes Berg99ba2a12010-11-24 08:10:06 +0100352 unsigned int lost_packets;
353
Guy Eilam2a33bee2011-08-17 15:18:15 +0300354 /* should be right in front of sta to be in the same cache line */
355 bool dummy;
356
Johannes Berg17741cd2008-09-11 00:02:02 +0200357 /* keep last! */
358 struct ieee80211_sta sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700359};
360
Javier Cardona57cf8042011-05-13 10:45:43 -0700361static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100362{
363#ifdef CONFIG_MAC80211_MESH
364 return sta->plink_state;
365#endif
Javier Cardona57cf8042011-05-13 10:45:43 -0700366 return NL80211_PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100367}
368
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200369static inline void set_sta_flag(struct sta_info *sta,
370 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200371{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200372 set_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200373}
374
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200375static inline void clear_sta_flag(struct sta_info *sta,
376 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200377{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200378 clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200379}
380
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200381static inline int test_sta_flag(struct sta_info *sta,
382 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200383{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200384 return test_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200385}
386
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200387static inline int test_and_clear_sta_flag(struct sta_info *sta,
388 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200389{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200390 return test_and_clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200391}
392
Johannes Bergec034b22011-05-13 13:35:40 +0200393void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
394 struct tid_ampdu_tx *tid_tx);
Jiri Bencf0706e82007-05-05 11:45:53 -0700395
Johannes Berg40b275b2011-05-13 14:15:49 +0200396static inline struct tid_ampdu_tx *
397rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
398{
399 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
400 lockdep_is_held(&sta->lock) ||
401 lockdep_is_held(&sta->ampdu_mlme.mtx));
402}
Jiri Bencf0706e82007-05-05 11:45:53 -0700403
404#define STA_HASH_SIZE 256
405#define STA_HASH(sta) (sta[5])
406
407
Johannes Berg948d8872011-09-29 16:04:29 +0200408/* Maximum number of frames to buffer per power saving station per AC */
409#define STA_MAX_TX_BUFFER 64
Jiri Bencf0706e82007-05-05 11:45:53 -0700410
411/* Minimum buffered frame expiry time. If STA uses listen interval that is
412 * smaller than this value, the minimum value here is used instead. */
413#define STA_TX_BUFFER_EXPIRE (10 * HZ)
414
415/* How often station data is cleaned up (e.g., expiration of buffered frames)
416 */
417#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
418
Johannes Bergd0709a62008-02-25 16:27:46 +0100419/*
Johannes Bergabe60632009-11-25 17:46:18 +0100420 * Get a STA info, must be under RCU read lock.
Johannes Bergd0709a62008-02-25 16:27:46 +0100421 */
Johannes Bergabe60632009-11-25 17:46:18 +0100422struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
423 const u8 *addr);
424
Guy Eilam2a33bee2011-08-17 15:18:15 +0300425struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata,
426 const u8 *addr);
427
Felix Fietkau0e5ded52010-01-08 18:10:58 +0100428struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
429 const u8 *addr);
430
Guy Eilam2a33bee2011-08-17 15:18:15 +0300431struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata,
432 const u8 *addr);
433
Johannes Bergabe60632009-11-25 17:46:18 +0100434static inline
435void for_each_sta_info_type_check(struct ieee80211_local *local,
436 const u8 *addr,
437 struct sta_info *sta,
438 struct sta_info *nxt)
439{
440}
441
Felix Fietkau38bdb652010-06-25 01:44:33 +0200442#define for_each_sta_info(local, _addr, _sta, nxt) \
Johannes Bergabe60632009-11-25 17:46:18 +0100443 for ( /* initialise loop */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200444 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
445 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
Johannes Bergabe60632009-11-25 17:46:18 +0100446 /* typecheck */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200447 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
Johannes Bergabe60632009-11-25 17:46:18 +0100448 /* continue condition */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200449 _sta; \
Johannes Bergabe60632009-11-25 17:46:18 +0100450 /* advance loop */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200451 _sta = nxt, \
452 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
Johannes Bergabe60632009-11-25 17:46:18 +0100453 ) \
Guy Eilam2a33bee2011-08-17 15:18:15 +0300454 /* run code only if address matches and it's not a dummy sta */ \
455 if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \
456 !_sta->dummy)
457
458#define for_each_sta_info_rx(local, _addr, _sta, nxt) \
459 for ( /* initialise loop */ \
460 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
461 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
462 /* typecheck */ \
463 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
464 /* continue condition */ \
465 _sta; \
466 /* advance loop */ \
467 _sta = nxt, \
468 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
469 ) \
Johannes Bergabe60632009-11-25 17:46:18 +0100470 /* compare address and run code only if it matches */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200471 if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0)
Johannes Bergabe60632009-11-25 17:46:18 +0100472
Johannes Bergd0709a62008-02-25 16:27:46 +0100473/*
474 * Get STA info by index, BROKEN!
475 */
Johannes Berg3b53fde82009-11-16 12:00:37 +0100476struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
477 int idx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100478/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100479 * Create a new STA info, caller owns returned structure
480 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100481 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100482struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
483 u8 *addr, gfp_t gfp);
484/*
485 * Insert STA info into hash table/list, returns zero or a
486 * -EEXIST if (if the same MAC address is already present).
487 *
Johannes Berg34e89502010-02-03 13:59:58 +0100488 * Calling the non-rcu version makes the caller relinquish,
489 * the _rcu version calls read_lock_rcu() and must be called
490 * without it held.
Johannes Berg73651ee2008-02-25 16:27:47 +0100491 */
492int sta_info_insert(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100493int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
494int sta_info_insert_atomic(struct sta_info *sta);
Guy Eilam2a33bee2011-08-17 15:18:15 +0300495int sta_info_reinsert(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100496
Johannes Berg34e89502010-02-03 13:59:58 +0100497int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
498 const u8 *addr);
499int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
500 const u8 *addr);
501
Johannes Bergc868cb352011-09-29 16:04:27 +0200502void sta_info_recalc_tim(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100503
Jiri Bencf0706e82007-05-05 11:45:53 -0700504void sta_info_init(struct ieee80211_local *local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700505void sta_info_stop(struct ieee80211_local *local);
Johannes Berg44213b52008-02-25 16:27:49 +0100506int sta_info_flush(struct ieee80211_local *local,
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200507 struct ieee80211_sub_if_data *sdata);
Johannes Berg24723d12008-09-11 00:01:46 +0200508void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
509 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100510
Johannes Bergaf818582009-11-06 11:35:50 +0100511void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
512void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
Johannes Berg47086fc2011-09-29 16:04:33 +0200513void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
Johannes Bergaf818582009-11-06 11:35:50 +0100514
Jiri Bencf0706e82007-05-05 11:45:53 -0700515#endif /* STA_INFO_H */