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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>
Felix Fietkau888d04d2012-03-01 15:22:09 +010017#include <linux/etherdevice.h>
Johannes Berg2c8dccc2008-04-08 15:14:40 -040018#include "key.h"
Jiri Bencf0706e82007-05-05 11:45:53 -070019
Johannes Berg238814f2008-01-28 17:19:37 +010020/**
21 * enum ieee80211_sta_info_flags - Stations flags
22 *
Johannes Bergc2c98fd2011-09-29 16:04:36 +020023 * These flags are used with &struct sta_info's @flags member, but
24 * only indirectly with set_sta_flag() and friends.
Johannes Berg238814f2008-01-28 17:19:37 +010025 *
26 * @WLAN_STA_AUTH: Station is authenticated.
27 * @WLAN_STA_ASSOC: Station is associated.
Johannes Bergaf818582009-11-06 11:35:50 +010028 * @WLAN_STA_PS_STA: Station is in power-save mode
Johannes Berg238814f2008-01-28 17:19:37 +010029 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
30 * This bit is always checked so needs to be enabled for all stations
31 * when virtual port control is not in use.
32 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
33 * frames.
Johannes Berg238814f2008-01-28 17:19:37 +010034 * @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 Berge7f4a942011-11-04 11:18:20 +010055 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
Johannes Berg83d5cc02012-01-12 09:31:10 +010056 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
Johannes Berge1936e92012-01-20 13:55:23 +010057 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
Javier Cardonadbf498f2012-03-31 11:31:32 -070058 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
Marco Porsch3f52b7e2013-01-30 18:14:08 +010059 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
60 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
Johannes Berg238814f2008-01-28 17:19:37 +010061 */
62enum ieee80211_sta_info_flags {
Johannes Bergc2c98fd2011-09-29 16:04:36 +020063 WLAN_STA_AUTH,
64 WLAN_STA_ASSOC,
65 WLAN_STA_PS_STA,
66 WLAN_STA_AUTHORIZED,
67 WLAN_STA_SHORT_PREAMBLE,
Johannes Bergc2c98fd2011-09-29 16:04:36 +020068 WLAN_STA_WME,
69 WLAN_STA_WDS,
70 WLAN_STA_CLEAR_PS_FILT,
71 WLAN_STA_MFP,
72 WLAN_STA_BLOCK_BA,
73 WLAN_STA_PS_DRIVER,
74 WLAN_STA_PSPOLL,
75 WLAN_STA_TDLS_PEER,
76 WLAN_STA_TDLS_PEER_AUTH,
77 WLAN_STA_UAPSD,
78 WLAN_STA_SP,
Johannes Berge7f4a942011-11-04 11:18:20 +010079 WLAN_STA_4ADDR_EVENT,
Johannes Berg83d5cc02012-01-12 09:31:10 +010080 WLAN_STA_INSERTED,
Johannes Berge1936e92012-01-20 13:55:23 +010081 WLAN_STA_RATE_CONTROL,
Javier Cardonadbf498f2012-03-31 11:31:32 -070082 WLAN_STA_TOFFSET_KNOWN,
Marco Porsch3f52b7e2013-01-30 18:14:08 +010083 WLAN_STA_MPSP_OWNER,
84 WLAN_STA_MPSP_RECIPIENT,
Johannes Berg238814f2008-01-28 17:19:37 +010085};
Jiri Bencf0706e82007-05-05 11:45:53 -070086
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020087#define ADDBA_RESP_INTERVAL HZ
Nikolay Martynov84381b42011-12-17 19:39:35 -050088#define HT_AGG_MAX_RETRIES 15
89#define HT_AGG_BURST_RETRIES 3
90#define HT_AGG_RETRIES_PERIOD (15 * HZ)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020091
Johannes Berga622ab72010-06-10 10:21:39 +020092#define HT_AGG_STATE_DRV_READY 0
93#define HT_AGG_STATE_RESPONSE_RECEIVED 1
94#define HT_AGG_STATE_OPERATIONAL 2
95#define HT_AGG_STATE_STOPPING 3
Johannes Berg0ab33702010-06-10 10:21:42 +020096#define HT_AGG_STATE_WANT_START 4
97#define HT_AGG_STATE_WANT_STOP 5
Ron Rindjunsky80656c22008-01-28 14:07:16 +020098
Johannes Bergc82c4a82012-07-18 13:31:31 +020099enum ieee80211_agg_stop_reason {
100 AGG_STOP_DECLINED,
101 AGG_STOP_LOCAL_REQUEST,
102 AGG_STOP_PEER_REQUEST,
103 AGG_STOP_DESTROY_STA,
104};
105
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200106/**
107 * struct tid_ampdu_tx - TID aggregation information (Tx).
108 *
Johannes Berga622ab72010-06-10 10:21:39 +0200109 * @rcu_head: rcu head for freeing structure
Nikolay Martynov285fa692011-11-22 21:50:28 -0500110 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200111 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100112 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200113 * @dialog_token: dialog token for aggregation session
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530114 * @timeout: session timeout value to be filled in ADDBA requests
Johannes Berga622ab72010-06-10 10:21:39 +0200115 * @state: session state (see above)
Felix Fietkau12d3952f2012-03-18 22:58:06 +0100116 * @last_tx: jiffies of last tx activity
Johannes Berga622ab72010-06-10 10:21:39 +0200117 * @stop_initiator: initiator of a session stop
Johannes Berg53f73c02010-10-05 19:37:40 +0200118 * @tx_stop: TX DelBA frame when stopping
Johannes Berg0b01f032011-01-18 13:51:05 +0100119 * @buf_size: reorder buffer size at receiver
Felix Fietkauf0425be2011-08-28 21:11:01 +0200120 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
121 * @bar_pending: BAR needs to be re-sent
Johannes Berga622ab72010-06-10 10:21:39 +0200122 *
Johannes Bergdd318572010-11-29 11:09:16 +0100123 * This structure's lifetime is managed by RCU, assignments to
124 * the array holding it must hold the aggregation mutex.
125 *
126 * The TX path can access it under RCU lock-free if, and
127 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
128 * set. Otherwise, the TX path must also acquire the spinlock
129 * and re-check the state, see comments in the tx code
130 * touching it.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200131 */
132struct tid_ampdu_tx {
Johannes Berga622ab72010-06-10 10:21:39 +0200133 struct rcu_head rcu_head;
Nikolay Martynov285fa692011-11-22 21:50:28 -0500134 struct timer_list session_timer;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200135 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100136 struct sk_buff_head pending;
Johannes Berga622ab72010-06-10 10:21:39 +0200137 unsigned long state;
Felix Fietkau12d3952f2012-03-18 22:58:06 +0100138 unsigned long last_tx;
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530139 u16 timeout;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200140 u8 dialog_token;
Johannes Berga622ab72010-06-10 10:21:39 +0200141 u8 stop_initiator;
Johannes Berg53f73c02010-10-05 19:37:40 +0200142 bool tx_stop;
Johannes Berg0b01f032011-01-18 13:51:05 +0100143 u8 buf_size;
Felix Fietkauf0425be2011-08-28 21:11:01 +0200144
145 u16 failed_bar_ssn;
146 bool bar_pending;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200147};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200148
149/**
150 * struct tid_ampdu_rx - TID aggregation information (Rx).
151 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200152 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +0300153 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200154 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200155 * @reorder_timer: releases expired frames from the reorder buffer.
Felix Fietkau12d3952f2012-03-18 22:58:06 +0100156 * @last_rx: jiffies of last rx activity
Johannes Berg056cdd52008-03-26 23:21:47 +0100157 * @head_seq_num: head sequence number in reordering buffer.
158 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200159 * @ssn: Starting Sequence Number expected to be aggregated.
160 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +0100161 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200162 * @dialog_token: dialog token for aggregation session
Johannes Berga87f7362010-06-10 10:21:38 +0200163 * @rcu_head: RCU head used for freeing this struct
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200164 * @reorder_lock: serializes access to reorder buffer, see below.
Johannes Berga87f7362010-06-10 10:21:38 +0200165 *
Johannes Bergdd318572010-11-29 11:09:16 +0100166 * This structure's lifetime is managed by RCU, assignments to
167 * the array holding it must hold the aggregation mutex.
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200168 *
Johannes Bergdd318572010-11-29 11:09:16 +0100169 * The @reorder_lock is used to protect the members of this
170 * struct, except for @timeout, @buf_size and @dialog_token,
171 * which are constant across the lifetime of the struct (the
172 * dialog token being used only for debugging).
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200173 */
174struct tid_ampdu_rx {
Johannes Berga87f7362010-06-10 10:21:38 +0200175 struct rcu_head rcu_head;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200176 spinlock_t reorder_lock;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200177 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300178 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200179 struct timer_list session_timer;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200180 struct timer_list reorder_timer;
Felix Fietkau12d3952f2012-03-18 22:58:06 +0100181 unsigned long last_rx;
Johannes Berg056cdd52008-03-26 23:21:47 +0100182 u16 head_seq_num;
183 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200184 u16 ssn;
185 u16 buf_size;
186 u16 timeout;
187 u8 dialog_token;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200188};
189
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800190/**
Johannes Bergfcea6002010-05-31 11:40:23 +0200191 * struct sta_ampdu_mlme - STA aggregation information.
192 *
Johannes Berga87f7362010-06-10 10:21:38 +0200193 * @tid_rx: aggregation info for Rx per TID -- RCU protected
Johannes Bergfcea6002010-05-31 11:40:23 +0200194 * @tid_tx: aggregation info for Tx per TID
Johannes Bergec034b22011-05-13 13:35:40 +0200195 * @tid_start_tx: sessions where start was requested
Johannes Bergfcea6002010-05-31 11:40:23 +0200196 * @addba_req_num: number of times addBA request has been sent.
Nikolay Martynov84381b42011-12-17 19:39:35 -0500197 * @last_addba_req_time: timestamp of the last addBA request.
Johannes Bergfcea6002010-05-31 11:40:23 +0200198 * @dialog_token_allocator: dialog token enumerator for each new session;
Johannes Berg0ab33702010-06-10 10:21:42 +0200199 * @work: work struct for starting/stopping aggregation
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200200 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
201 * RX timer expired until the work for it runs
Shahar Levif41ccd72011-05-22 16:10:21 +0300202 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
203 * driver requested to close until the work for it runs
Johannes Berga93e3642010-06-10 10:21:46 +0200204 * @mtx: mutex to protect all TX data (except non-NULL assignments
205 * to tid_tx[idx], which are protected by the sta spinlock)
Johannes Bergfcea6002010-05-31 11:40:23 +0200206 */
207struct sta_ampdu_mlme {
Johannes Berga93e3642010-06-10 10:21:46 +0200208 struct mutex mtx;
Johannes Bergfcea6002010-05-31 11:40:23 +0200209 /* rx */
Johannes Berg5a306f52012-11-14 23:22:21 +0100210 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
211 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
212 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
Johannes Bergfcea6002010-05-31 11:40:23 +0200213 /* tx */
Johannes Berg0ab33702010-06-10 10:21:42 +0200214 struct work_struct work;
Johannes Berg5a306f52012-11-14 23:22:21 +0100215 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
216 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
217 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
218 u8 addba_req_num[IEEE80211_NUM_TIDS];
Johannes Bergfcea6002010-05-31 11:40:23 +0200219 u8 dialog_token_allocator;
220};
221
222
223/**
Johannes Berg693b1bb2008-02-25 16:27:48 +0100224 * struct sta_info - STA information
225 *
226 * This structure collects information about a station that
227 * mac80211 is communicating with.
228 *
229 * @list: global linked list entry
230 * @hnext: hash table linked list pointer
231 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200232 * @sdata: virtual interface this station belongs to
Johannes Berge31b8212010-10-05 19:39:30 +0200233 * @ptk: peer key negotiated with this station, if any
234 * @gtk: group keys negotiated with this station, if any
Johannes Berge25cf4a2008-10-23 08:51:20 +0200235 * @rate_ctrl: rate control algorithm reference
236 * @rate_ctrl_priv: rate control private per-STA pointer
237 * @last_tx_rate: rate used for last transmit, to report to userspace as
238 * "the" transmit rate
Felix Fietkau3af63342011-02-27 22:08:01 +0100239 * @last_rx_rate_idx: rx status rate index of the last data packet
240 * @last_rx_rate_flag: rx status flag of the last data packet
Johannes Berg56146182012-11-09 15:07:02 +0100241 * @last_rx_rate_vht_nss: rx status nss of last data packet
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700242 * @lock: used for locking all fields that require locking, see comments
243 * in the header file.
Jaswinder Singh Rajput841507f2009-11-22 13:47:58 +0530244 * @drv_unblock_wk: used for driver PS unblocking
Johannes Berge25cf4a2008-10-23 08:51:20 +0200245 * @listen_interval: listen interval of this station, when we're acting as AP
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200246 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
Johannes Berg948d8872011-09-29 16:04:29 +0200247 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
248 * when it leaves power saving state or polls
249 * @tx_filtered: buffers (per AC) of frames we already tried to
250 * transmit but were filtered by hardware due to STA having
251 * entered power saving state, these are also delivered to
252 * the station when it leaves powersave or polls for frames
253 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
Johannes Berg693b1bb2008-02-25 16:27:48 +0100254 * @rx_packets: Number of MSDUs received from this STA
255 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200256 * @wep_weak_iv_count: number of weak WEP IVs received from this station
257 * @last_rx: time (in jiffies) when last frame was received from this STA
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530258 * @last_connected: time (in seconds) when a station got connected
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700259 * @num_duplicates: number of duplicate frames received from this STA
260 * @rx_fragments: number of received MPDUs
261 * @rx_dropped: number of dropped MPDUs from this STA
262 * @last_signal: signal of last received frame from this STA
Bruno Randolf541a45a2010-12-02 19:12:43 +0900263 * @avg_signal: moving average of signal of received frames from this STA
Saravanadb943572012-11-28 18:27:09 +0530264 * @last_ack_signal: signal of last received Ack frame from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700265 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200266 * @tx_filtered_count: number of frames the hardware filtered for this STA
267 * @tx_retry_failed: number of frames that failed retry
268 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700269 * @fail_avg: moving percentage of failed MSDUs
270 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200271 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700272 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200273 * @tid_seq: per-TID sequence numbers for sending to this STA
274 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700275 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700276 * @llid: Local link ID
277 * @plid: Peer link ID
278 * @reason: Cancel reason on PLINK_HOLDING state
279 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200280 * @ignore_plink_timer: ignore the peer-link timer (used internally)
281 * @plink_state: peer link state
282 * @plink_timeout: timeout of peer link
283 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200284 * @plink_timer_was_running: used by suspend/resume to restore timers
Javier Cardonadbf498f2012-03-31 11:31:32 -0700285 * @t_offset: timing offset relative to this host
Ashok Nagarajan1dd45582012-06-11 10:23:35 -0700286 * @t_offset_setpoint: reference timing offset of this sta to be used when
287 * calculating clockdrift
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100288 * @local_pm: local link-specific power save mode
289 * @peer_pm: peer-specific power save mode towards local STA
290 * @nonpeer_pm: STA power save mode towards non-peer neighbors
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700291 * @debugfs: debug filesystem info
Johannes Bergaf818582009-11-06 11:35:50 +0100292 * @dead: set to true when sta is unlinked
Johannes Berg34e89502010-02-03 13:59:58 +0100293 * @uploaded: set to true when sta is uploaded to the driver
Johannes Berg99ba2a12010-11-24 08:10:06 +0100294 * @lost_packets: number of consecutive lost packets
Guy Eilam2a33bee2011-08-17 15:18:15 +0300295 * @sta: station information we share with the driver
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100296 * @sta_state: duplicates information about station state (for debug)
Paul Stewarta85e1d52011-12-09 11:01:49 -0800297 * @beacon_loss_count: number of times beacon loss has triggered
Johannes Berg077f8972013-02-08 09:06:36 +0100298 * @rcu_head: RCU head used for freeing this station struct
Johannes Berg0af83d32012-12-27 18:55:36 +0100299 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
300 * taken from HT/VHT capabilities or VHT operating mode notification
Johannes Berg693b1bb2008-02-25 16:27:48 +0100301 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700302struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100303 /* General information, mostly static */
Jiri Bencf0706e82007-05-05 11:45:53 -0700304 struct list_head list;
Eliad Pellerb22cfcf2012-09-09 14:43:51 +0300305 struct rcu_head rcu_head;
Johannes Berg40b275b2011-05-13 14:15:49 +0200306 struct sta_info __rcu *hnext;
Jiri Bencf0706e82007-05-05 11:45:53 -0700307 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100308 struct ieee80211_sub_if_data *sdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200309 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
310 struct ieee80211_key __rcu *ptk;
Jiri Bencf0706e82007-05-05 11:45:53 -0700311 struct rate_control_ref *rate_ctrl;
312 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200313 spinlock_t lock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200314
Johannes Bergaf818582009-11-06 11:35:50 +0100315 struct work_struct drv_unblock_wk;
316
Jiri Bencf0706e82007-05-05 11:45:53 -0700317 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700318
Johannes Bergaf818582009-11-06 11:35:50 +0100319 bool dead;
320
Johannes Berg34e89502010-02-03 13:59:58 +0100321 bool uploaded;
Johannes Bergd0709a62008-02-25 16:27:46 +0100322
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100323 enum ieee80211_sta_state sta_state;
324
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200325 /* use the accessors defined below */
326 unsigned long _flags;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100327
328 /*
329 * STA powersave frame queues, no more than the internal
330 * locking required.
331 */
Johannes Berg948d8872011-09-29 16:04:29 +0200332 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
333 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
334 unsigned long driver_buffered_tids;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100335
336 /* Updated from RX path only, no locking requirements */
337 unsigned long rx_packets, rx_bytes;
338 unsigned long wep_weak_iv_count;
339 unsigned long last_rx;
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530340 long last_connected;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700341 unsigned long num_duplicates;
342 unsigned long rx_fragments;
343 unsigned long rx_dropped;
344 int last_signal;
Bruno Randolf541a45a2010-12-02 19:12:43 +0900345 struct ewma avg_signal;
Saravanadb943572012-11-28 18:27:09 +0530346 int last_ack_signal;
Johannes Berg9e262972011-07-07 18:45:03 +0200347 /* Plus 1 for non-QoS frames */
Johannes Berg5a306f52012-11-14 23:22:21 +0100348 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100349
350 /* Updated from TX status path only, no locking requirements */
351 unsigned long tx_filtered_count;
352 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100353 /* moving percentage of failed MSDUs */
354 unsigned int fail_avg;
355
356 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700357 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100358 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700359 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200360 struct ieee80211_tx_rate last_tx_rate;
Felix Fietkau3af63342011-02-27 22:08:01 +0100361 int last_rx_rate_idx;
Johannes Berg56146182012-11-09 15:07:02 +0100362 u32 last_rx_rate_flag;
363 u8 last_rx_rate_vht_nss;
Johannes Bergf591fa52008-07-10 11:21:26 +0200364 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100365
Johannes Berg693b1bb2008-02-25 16:27:48 +0100366 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200367 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100368 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200369 struct sta_ampdu_mlme ampdu_mlme;
Johannes Berg5a306f52012-11-14 23:22:21 +0100370 u8 timer_to_tid[IEEE80211_NUM_TIDS];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100371
Luis Carlos Coboee385852008-02-23 15:17:11 +0100372#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100373 /*
374 * Mesh peer link attributes
375 * TODO: move to a sub-structure that is referenced with pointer?
376 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700377 __le16 llid;
378 __le16 plid;
379 __le16 reason;
380 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100381 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200382 bool plink_timer_was_running;
Javier Cardona57cf8042011-05-13 10:45:43 -0700383 enum nl80211_plink_state plink_state;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100384 u32 plink_timeout;
385 struct timer_list plink_timer;
Javier Cardonadbf498f2012-03-31 11:31:32 -0700386 s64 t_offset;
387 s64 t_offset_setpoint;
Marco Porsch3f52b7e2013-01-30 18:14:08 +0100388 /* mesh power save */
389 enum nl80211_mesh_power_mode local_pm;
390 enum nl80211_mesh_power_mode peer_pm;
391 enum nl80211_mesh_power_mode nonpeer_pm;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100392#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200393
Jiri Bence9f207f2007-05-05 11:46:38 -0700394#ifdef CONFIG_MAC80211_DEBUGFS
395 struct sta_info_debugfsdentries {
396 struct dentry *dir;
Johannes Berg63044e92008-10-07 12:04:29 +0200397 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700398 } debugfs;
399#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200400
Johannes Berg0af83d32012-12-27 18:55:36 +0100401 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
402
Johannes Berg99ba2a12010-11-24 08:10:06 +0100403 unsigned int lost_packets;
Paul Stewarta85e1d52011-12-09 11:01:49 -0800404 unsigned int beacon_loss_count;
Johannes Berg99ba2a12010-11-24 08:10:06 +0100405
Johannes Berg17741cd2008-09-11 00:02:02 +0200406 /* keep last! */
407 struct ieee80211_sta sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700408};
409
Javier Cardona57cf8042011-05-13 10:45:43 -0700410static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100411{
412#ifdef CONFIG_MAC80211_MESH
413 return sta->plink_state;
414#endif
Javier Cardona57cf8042011-05-13 10:45:43 -0700415 return NL80211_PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100416}
417
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200418static inline void set_sta_flag(struct sta_info *sta,
419 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200420{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100421 WARN_ON(flag == WLAN_STA_AUTH ||
422 flag == WLAN_STA_ASSOC ||
423 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200424 set_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200425}
426
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200427static inline void clear_sta_flag(struct sta_info *sta,
428 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200429{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100430 WARN_ON(flag == WLAN_STA_AUTH ||
431 flag == WLAN_STA_ASSOC ||
432 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200433 clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200434}
435
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200436static inline int test_sta_flag(struct sta_info *sta,
437 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200438{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200439 return test_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200440}
441
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200442static inline int test_and_clear_sta_flag(struct sta_info *sta,
443 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200444{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100445 WARN_ON(flag == WLAN_STA_AUTH ||
446 flag == WLAN_STA_ASSOC ||
447 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200448 return test_and_clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200449}
450
Johannes Berge7f4a942011-11-04 11:18:20 +0100451static inline int test_and_set_sta_flag(struct sta_info *sta,
452 enum ieee80211_sta_info_flags flag)
453{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100454 WARN_ON(flag == WLAN_STA_AUTH ||
455 flag == WLAN_STA_ASSOC ||
456 flag == WLAN_STA_AUTHORIZED);
Johannes Berge7f4a942011-11-04 11:18:20 +0100457 return test_and_set_bit(flag, &sta->_flags);
458}
459
Johannes Berg83d5cc02012-01-12 09:31:10 +0100460int sta_info_move_state(struct sta_info *sta,
461 enum ieee80211_sta_state new_state);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100462
Johannes Berg83d5cc02012-01-12 09:31:10 +0100463static inline void sta_info_pre_move_state(struct sta_info *sta,
464 enum ieee80211_sta_state new_state)
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100465{
Johannes Berg83d5cc02012-01-12 09:31:10 +0100466 int ret;
467
468 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
469
470 ret = sta_info_move_state(sta, new_state);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100471 WARN_ON_ONCE(ret);
472}
473
474
Johannes Bergec034b22011-05-13 13:35:40 +0200475void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
476 struct tid_ampdu_tx *tid_tx);
Jiri Bencf0706e82007-05-05 11:45:53 -0700477
Johannes Berg40b275b2011-05-13 14:15:49 +0200478static inline struct tid_ampdu_tx *
479rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
480{
481 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
482 lockdep_is_held(&sta->lock) ||
483 lockdep_is_held(&sta->ampdu_mlme.mtx));
484}
Jiri Bencf0706e82007-05-05 11:45:53 -0700485
486#define STA_HASH_SIZE 256
487#define STA_HASH(sta) (sta[5])
488
489
Johannes Berg948d8872011-09-29 16:04:29 +0200490/* Maximum number of frames to buffer per power saving station per AC */
491#define STA_MAX_TX_BUFFER 64
Jiri Bencf0706e82007-05-05 11:45:53 -0700492
493/* Minimum buffered frame expiry time. If STA uses listen interval that is
494 * smaller than this value, the minimum value here is used instead. */
495#define STA_TX_BUFFER_EXPIRE (10 * HZ)
496
497/* How often station data is cleaned up (e.g., expiration of buffered frames)
498 */
499#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
500
Johannes Bergd0709a62008-02-25 16:27:46 +0100501/*
Johannes Bergabe60632009-11-25 17:46:18 +0100502 * Get a STA info, must be under RCU read lock.
Johannes Bergd0709a62008-02-25 16:27:46 +0100503 */
Johannes Bergabe60632009-11-25 17:46:18 +0100504struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
505 const u8 *addr);
506
Felix Fietkau0e5ded52010-01-08 18:10:58 +0100507struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
508 const u8 *addr);
509
Johannes Bergabe60632009-11-25 17:46:18 +0100510static inline
511void for_each_sta_info_type_check(struct ieee80211_local *local,
512 const u8 *addr,
513 struct sta_info *sta,
514 struct sta_info *nxt)
515{
516}
517
Johannes Berg7852e362012-01-20 13:55:24 +0100518#define for_each_sta_info(local, _addr, _sta, nxt) \
Guy Eilam2a33bee2011-08-17 15:18:15 +0300519 for ( /* initialise loop */ \
520 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
521 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
522 /* typecheck */ \
523 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
524 /* continue condition */ \
525 _sta; \
526 /* advance loop */ \
527 _sta = nxt, \
528 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
529 ) \
Johannes Bergabe60632009-11-25 17:46:18 +0100530 /* compare address and run code only if it matches */ \
Joe Perches3bc79452012-05-08 18:56:53 +0000531 if (ether_addr_equal(_sta->sta.addr, (_addr)))
Johannes Bergabe60632009-11-25 17:46:18 +0100532
Johannes Bergd0709a62008-02-25 16:27:46 +0100533/*
534 * Get STA info by index, BROKEN!
535 */
Johannes Berg3b53fde82009-11-16 12:00:37 +0100536struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
537 int idx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100538/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100539 * Create a new STA info, caller owns returned structure
540 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100541 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100542struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
Johannes Berg56544162011-12-14 13:28:46 +0100543 const u8 *addr, gfp_t gfp);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100544
545void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
546
Johannes Berg73651ee2008-02-25 16:27:47 +0100547/*
548 * Insert STA info into hash table/list, returns zero or a
549 * -EEXIST if (if the same MAC address is already present).
550 *
Johannes Berg34e89502010-02-03 13:59:58 +0100551 * Calling the non-rcu version makes the caller relinquish,
552 * the _rcu version calls read_lock_rcu() and must be called
553 * without it held.
Johannes Berg73651ee2008-02-25 16:27:47 +0100554 */
555int sta_info_insert(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100556int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
Johannes Bergd0709a62008-02-25 16:27:46 +0100557
Johannes Berg83d5cc02012-01-12 09:31:10 +0100558int __must_check __sta_info_destroy(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100559int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
560 const u8 *addr);
561int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
562 const u8 *addr);
563
Johannes Bergc868cb352011-09-29 16:04:27 +0200564void sta_info_recalc_tim(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100565
Jiri Bencf0706e82007-05-05 11:45:53 -0700566void sta_info_init(struct ieee80211_local *local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700567void sta_info_stop(struct ieee80211_local *local);
Johannes Berg051007d2012-12-13 23:49:02 +0100568int sta_info_flush_defer(struct ieee80211_sub_if_data *sdata);
Johannes Berg75de9112012-12-14 14:56:03 +0100569
570/**
571 * sta_info_flush_cleanup - flush the sta_info cleanup queue
572 * @sdata: the interface
573 *
574 * Flushes the sta_info cleanup queue for a given interface;
575 * this is necessary before the interface is removed or, for
576 * AP/mesh interfaces, before it is deconfigured.
577 *
578 * Note an rcu_barrier() must precede the function, after all
579 * stations have been flushed/removed to ensure the call_rcu()
580 * calls that add stations to the cleanup queue have completed.
581 */
Johannes Berg051007d2012-12-13 23:49:02 +0100582void sta_info_flush_cleanup(struct ieee80211_sub_if_data *sdata);
583
584/**
585 * sta_info_flush - flush matching STA entries from the STA table
586 *
587 * Returns the number of removed STA entries.
588 *
589 * @sdata: sdata to remove all stations from
590 */
591static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
592{
593 int ret = sta_info_flush_defer(sdata);
594
Johannes Berg75de9112012-12-14 14:56:03 +0100595 rcu_barrier();
Johannes Berg051007d2012-12-13 23:49:02 +0100596 sta_info_flush_cleanup(sdata);
597
598 return ret;
599}
600
Thomas Pedersen6b62bf32012-03-05 15:31:48 -0800601void sta_set_rate_info_tx(struct sta_info *sta,
602 const struct ieee80211_tx_rate *rate,
603 struct rate_info *rinfo);
Saravana003e6762012-11-28 18:29:38 +0530604void sta_set_rate_info_rx(struct sta_info *sta,
605 struct rate_info *rinfo);
Johannes Berg24723d12008-09-11 00:01:46 +0200606void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
607 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100608
Johannes Bergaf818582009-11-06 11:35:50 +0100609void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
610void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
Johannes Berg47086fc2011-09-29 16:04:33 +0200611void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
Johannes Bergaf818582009-11-06 11:35:50 +0100612
Johannes Berg97f97b12012-12-13 22:54:58 +0100613void ieee80211_cleanup_sdata_stas(struct ieee80211_sub_if_data *sdata);
614
Jiri Bencf0706e82007-05-05 11:45:53 -0700615#endif /* STA_INFO_H */