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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 Bergdeeaee192011-09-29 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.
Johannes Berg238814f2008-01-28 17:19:37 +010058 */
59enum ieee80211_sta_info_flags {
Johannes Bergc2c98fd2011-09-29 16:04:36 +020060 WLAN_STA_AUTH,
61 WLAN_STA_ASSOC,
62 WLAN_STA_PS_STA,
63 WLAN_STA_AUTHORIZED,
64 WLAN_STA_SHORT_PREAMBLE,
Johannes Bergc2c98fd2011-09-29 16:04:36 +020065 WLAN_STA_WME,
66 WLAN_STA_WDS,
67 WLAN_STA_CLEAR_PS_FILT,
68 WLAN_STA_MFP,
69 WLAN_STA_BLOCK_BA,
70 WLAN_STA_PS_DRIVER,
71 WLAN_STA_PSPOLL,
72 WLAN_STA_TDLS_PEER,
73 WLAN_STA_TDLS_PEER_AUTH,
74 WLAN_STA_UAPSD,
75 WLAN_STA_SP,
Johannes Berge7f4a942011-11-04 11:18:20 +010076 WLAN_STA_4ADDR_EVENT,
Johannes Berg83d5cc02012-01-12 09:31:10 +010077 WLAN_STA_INSERTED,
Johannes Berge1936e92012-01-20 13:55:23 +010078 WLAN_STA_RATE_CONTROL,
Johannes Berg238814f2008-01-28 17:19:37 +010079};
Jiri Bencf0706e82007-05-05 11:45:53 -070080
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020081#define STA_TID_NUM 16
82#define ADDBA_RESP_INTERVAL HZ
Nikolay Martynov84381b42011-12-17 19:39:35 -050083#define HT_AGG_MAX_RETRIES 15
84#define HT_AGG_BURST_RETRIES 3
85#define HT_AGG_RETRIES_PERIOD (15 * HZ)
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020086
Johannes Berga622ab72010-06-10 10:21:39 +020087#define HT_AGG_STATE_DRV_READY 0
88#define HT_AGG_STATE_RESPONSE_RECEIVED 1
89#define HT_AGG_STATE_OPERATIONAL 2
90#define HT_AGG_STATE_STOPPING 3
Johannes Berg0ab33702010-06-10 10:21:42 +020091#define HT_AGG_STATE_WANT_START 4
92#define HT_AGG_STATE_WANT_STOP 5
Ron Rindjunsky80656c22008-01-28 14:07:16 +020093
94/**
95 * struct tid_ampdu_tx - TID aggregation information (Tx).
96 *
Johannes Berga622ab72010-06-10 10:21:39 +020097 * @rcu_head: rcu head for freeing structure
Nikolay Martynov285fa692011-11-22 21:50:28 -050098 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
Ron Rindjunsky80656c22008-01-28 14:07:16 +020099 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100100 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200101 * @dialog_token: dialog token for aggregation session
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530102 * @timeout: session timeout value to be filled in ADDBA requests
Johannes Berga622ab72010-06-10 10:21:39 +0200103 * @state: session state (see above)
104 * @stop_initiator: initiator of a session stop
Johannes Berg53f73c02010-10-05 19:37:40 +0200105 * @tx_stop: TX DelBA frame when stopping
Johannes Berg0b01f032011-01-18 13:51:05 +0100106 * @buf_size: reorder buffer size at receiver
Felix Fietkauf0425be2011-08-28 21:11:01 +0200107 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
108 * @bar_pending: BAR needs to be re-sent
Johannes Berga622ab72010-06-10 10:21:39 +0200109 *
Johannes Bergdd318572010-11-29 11:09:16 +0100110 * This structure's lifetime is managed by RCU, assignments to
111 * the array holding it must hold the aggregation mutex.
112 *
113 * The TX path can access it under RCU lock-free if, and
114 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
115 * set. Otherwise, the TX path must also acquire the spinlock
116 * and re-check the state, see comments in the tx code
117 * touching it.
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200118 */
119struct tid_ampdu_tx {
Johannes Berga622ab72010-06-10 10:21:39 +0200120 struct rcu_head rcu_head;
Nikolay Martynov285fa692011-11-22 21:50:28 -0500121 struct timer_list session_timer;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200122 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100123 struct sk_buff_head pending;
Johannes Berga622ab72010-06-10 10:21:39 +0200124 unsigned long state;
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530125 u16 timeout;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200126 u8 dialog_token;
Johannes Berga622ab72010-06-10 10:21:39 +0200127 u8 stop_initiator;
Johannes Berg53f73c02010-10-05 19:37:40 +0200128 bool tx_stop;
Johannes Berg0b01f032011-01-18 13:51:05 +0100129 u8 buf_size;
Felix Fietkauf0425be2011-08-28 21:11:01 +0200130
131 u16 failed_bar_ssn;
132 bool bar_pending;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200133};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200134
135/**
136 * struct tid_ampdu_rx - TID aggregation information (Rx).
137 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200138 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +0300139 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200140 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200141 * @reorder_timer: releases expired frames from the reorder buffer.
Johannes Berg056cdd52008-03-26 23:21:47 +0100142 * @head_seq_num: head sequence number in reordering buffer.
143 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200144 * @ssn: Starting Sequence Number expected to be aggregated.
145 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +0100146 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200147 * @dialog_token: dialog token for aggregation session
Johannes Berga87f7362010-06-10 10:21:38 +0200148 * @rcu_head: RCU head used for freeing this struct
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200149 * @reorder_lock: serializes access to reorder buffer, see below.
Johannes Berga87f7362010-06-10 10:21:38 +0200150 *
Johannes Bergdd318572010-11-29 11:09:16 +0100151 * This structure's lifetime is managed by RCU, assignments to
152 * the array holding it must hold the aggregation mutex.
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200153 *
Johannes Bergdd318572010-11-29 11:09:16 +0100154 * The @reorder_lock is used to protect the members of this
155 * struct, except for @timeout, @buf_size and @dialog_token,
156 * which are constant across the lifetime of the struct (the
157 * dialog token being used only for debugging).
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200158 */
159struct tid_ampdu_rx {
Johannes Berga87f7362010-06-10 10:21:38 +0200160 struct rcu_head rcu_head;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200161 spinlock_t reorder_lock;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200162 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300163 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200164 struct timer_list session_timer;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200165 struct timer_list reorder_timer;
Johannes Berg056cdd52008-03-26 23:21:47 +0100166 u16 head_seq_num;
167 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200168 u16 ssn;
169 u16 buf_size;
170 u16 timeout;
171 u8 dialog_token;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200172};
173
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800174/**
Johannes Bergfcea6002010-05-31 11:40:23 +0200175 * struct sta_ampdu_mlme - STA aggregation information.
176 *
Johannes Berga87f7362010-06-10 10:21:38 +0200177 * @tid_rx: aggregation info for Rx per TID -- RCU protected
Johannes Bergfcea6002010-05-31 11:40:23 +0200178 * @tid_tx: aggregation info for Tx per TID
Johannes Bergec034b22011-05-13 13:35:40 +0200179 * @tid_start_tx: sessions where start was requested
Johannes Bergfcea6002010-05-31 11:40:23 +0200180 * @addba_req_num: number of times addBA request has been sent.
Nikolay Martynov84381b42011-12-17 19:39:35 -0500181 * @last_addba_req_time: timestamp of the last addBA request.
Johannes Bergfcea6002010-05-31 11:40:23 +0200182 * @dialog_token_allocator: dialog token enumerator for each new session;
Johannes Berg0ab33702010-06-10 10:21:42 +0200183 * @work: work struct for starting/stopping aggregation
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200184 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
185 * RX timer expired until the work for it runs
Shahar Levif41ccd72011-05-22 16:10:21 +0300186 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
187 * driver requested to close until the work for it runs
Johannes Berga93e3642010-06-10 10:21:46 +0200188 * @mtx: mutex to protect all TX data (except non-NULL assignments
189 * to tid_tx[idx], which are protected by the sta spinlock)
Johannes Bergfcea6002010-05-31 11:40:23 +0200190 */
191struct sta_ampdu_mlme {
Johannes Berga93e3642010-06-10 10:21:46 +0200192 struct mutex mtx;
Johannes Bergfcea6002010-05-31 11:40:23 +0200193 /* rx */
Johannes Berg40b275b2011-05-13 14:15:49 +0200194 struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200195 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
Shahar Levif41ccd72011-05-22 16:10:21 +0300196 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)];
Johannes Bergfcea6002010-05-31 11:40:23 +0200197 /* tx */
Johannes Berg0ab33702010-06-10 10:21:42 +0200198 struct work_struct work;
Johannes Berg40b275b2011-05-13 14:15:49 +0200199 struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
Johannes Bergec034b22011-05-13 13:35:40 +0200200 struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
Nikolay Martynov84381b42011-12-17 19:39:35 -0500201 unsigned long last_addba_req_time[STA_TID_NUM];
Johannes Bergfcea6002010-05-31 11:40:23 +0200202 u8 addba_req_num[STA_TID_NUM];
203 u8 dialog_token_allocator;
204};
205
206
207/**
Johannes Berg693b1bb2008-02-25 16:27:48 +0100208 * struct sta_info - STA information
209 *
210 * This structure collects information about a station that
211 * mac80211 is communicating with.
212 *
213 * @list: global linked list entry
214 * @hnext: hash table linked list pointer
215 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200216 * @sdata: virtual interface this station belongs to
Johannes Berge31b8212010-10-05 19:39:30 +0200217 * @ptk: peer key negotiated with this station, if any
218 * @gtk: group keys negotiated with this station, if any
Johannes Berge25cf4a2008-10-23 08:51:20 +0200219 * @rate_ctrl: rate control algorithm reference
220 * @rate_ctrl_priv: rate control private per-STA pointer
221 * @last_tx_rate: rate used for last transmit, to report to userspace as
222 * "the" transmit rate
Felix Fietkau3af63342011-02-27 22:08:01 +0100223 * @last_rx_rate_idx: rx status rate index of the last data packet
224 * @last_rx_rate_flag: rx status flag of the last data packet
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700225 * @lock: used for locking all fields that require locking, see comments
226 * in the header file.
Jaswinder Singh Rajput841507f2009-11-22 13:47:58 +0530227 * @drv_unblock_wk: used for driver PS unblocking
Johannes Berge25cf4a2008-10-23 08:51:20 +0200228 * @listen_interval: listen interval of this station, when we're acting as AP
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200229 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
Johannes Berg948d8872011-09-29 16:04:29 +0200230 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
231 * when it leaves power saving state or polls
232 * @tx_filtered: buffers (per AC) of frames we already tried to
233 * transmit but were filtered by hardware due to STA having
234 * entered power saving state, these are also delivered to
235 * the station when it leaves powersave or polls for frames
236 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
Johannes Berg693b1bb2008-02-25 16:27:48 +0100237 * @rx_packets: Number of MSDUs received from this STA
238 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200239 * @wep_weak_iv_count: number of weak WEP IVs received from this station
240 * @last_rx: time (in jiffies) when last frame was received from this STA
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530241 * @last_connected: time (in seconds) when a station got connected
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700242 * @num_duplicates: number of duplicate frames received from this STA
243 * @rx_fragments: number of received MPDUs
244 * @rx_dropped: number of dropped MPDUs from this STA
245 * @last_signal: signal of last received frame from this STA
Bruno Randolf541a45a2010-12-02 19:12:43 +0900246 * @avg_signal: moving average of signal of received frames from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700247 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200248 * @tx_filtered_count: number of frames the hardware filtered for this STA
249 * @tx_retry_failed: number of frames that failed retry
250 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700251 * @fail_avg: moving percentage of failed MSDUs
252 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200253 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700254 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200255 * @tid_seq: per-TID sequence numbers for sending to this STA
256 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700257 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700258 * @llid: Local link ID
259 * @plid: Peer link ID
260 * @reason: Cancel reason on PLINK_HOLDING state
261 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200262 * @ignore_plink_timer: ignore the peer-link timer (used internally)
263 * @plink_state: peer link state
264 * @plink_timeout: timeout of peer link
265 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200266 * @plink_timer_was_running: used by suspend/resume to restore timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700267 * @debugfs: debug filesystem info
Johannes Bergaf818582009-11-06 11:35:50 +0100268 * @dead: set to true when sta is unlinked
Johannes Berg34e89502010-02-03 13:59:58 +0100269 * @uploaded: set to true when sta is uploaded to the driver
Johannes Berg99ba2a12010-11-24 08:10:06 +0100270 * @lost_packets: number of consecutive lost packets
Guy Eilam2a33bee2011-08-17 15:18:15 +0300271 * @sta: station information we share with the driver
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100272 * @sta_state: duplicates information about station state (for debug)
Paul Stewarta85e1d52011-12-09 11:01:49 -0800273 * @beacon_loss_count: number of times beacon loss has triggered
Johannes Berg693b1bb2008-02-25 16:27:48 +0100274 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700275struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100276 /* General information, mostly static */
Jiri Bencf0706e82007-05-05 11:45:53 -0700277 struct list_head list;
Johannes Berg40b275b2011-05-13 14:15:49 +0200278 struct sta_info __rcu *hnext;
Jiri Bencf0706e82007-05-05 11:45:53 -0700279 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100280 struct ieee80211_sub_if_data *sdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200281 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
282 struct ieee80211_key __rcu *ptk;
Jiri Bencf0706e82007-05-05 11:45:53 -0700283 struct rate_control_ref *rate_ctrl;
284 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200285 spinlock_t lock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200286
Johannes Bergaf818582009-11-06 11:35:50 +0100287 struct work_struct drv_unblock_wk;
288
Jiri Bencf0706e82007-05-05 11:45:53 -0700289 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700290
Johannes Bergaf818582009-11-06 11:35:50 +0100291 bool dead;
292
Johannes Berg34e89502010-02-03 13:59:58 +0100293 bool uploaded;
Johannes Bergd0709a62008-02-25 16:27:46 +0100294
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100295 enum ieee80211_sta_state sta_state;
296
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200297 /* use the accessors defined below */
298 unsigned long _flags;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100299
300 /*
301 * STA powersave frame queues, no more than the internal
302 * locking required.
303 */
Johannes Berg948d8872011-09-29 16:04:29 +0200304 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
305 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
306 unsigned long driver_buffered_tids;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100307
308 /* Updated from RX path only, no locking requirements */
309 unsigned long rx_packets, rx_bytes;
310 unsigned long wep_weak_iv_count;
311 unsigned long last_rx;
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530312 long last_connected;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700313 unsigned long num_duplicates;
314 unsigned long rx_fragments;
315 unsigned long rx_dropped;
316 int last_signal;
Bruno Randolf541a45a2010-12-02 19:12:43 +0900317 struct ewma avg_signal;
Johannes Berg9e262972011-07-07 18:45:03 +0200318 /* Plus 1 for non-QoS frames */
319 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100320
321 /* Updated from TX status path only, no locking requirements */
322 unsigned long tx_filtered_count;
323 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100324 /* moving percentage of failed MSDUs */
325 unsigned int fail_avg;
326
327 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700328 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100329 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700330 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200331 struct ieee80211_tx_rate last_tx_rate;
Felix Fietkau3af63342011-02-27 22:08:01 +0100332 int last_rx_rate_idx;
333 int last_rx_rate_flag;
Johannes Bergf591fa52008-07-10 11:21:26 +0200334 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100335
Johannes Berg693b1bb2008-02-25 16:27:48 +0100336 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200337 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100338 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200339 struct sta_ampdu_mlme ampdu_mlme;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700340 u8 timer_to_tid[STA_TID_NUM];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100341
Luis Carlos Coboee385852008-02-23 15:17:11 +0100342#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100343 /*
344 * Mesh peer link attributes
345 * TODO: move to a sub-structure that is referenced with pointer?
346 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700347 __le16 llid;
348 __le16 plid;
349 __le16 reason;
350 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100351 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200352 bool plink_timer_was_running;
Javier Cardona57cf8042011-05-13 10:45:43 -0700353 enum nl80211_plink_state plink_state;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100354 u32 plink_timeout;
355 struct timer_list plink_timer;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100356#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200357
Jiri Bence9f207f2007-05-05 11:46:38 -0700358#ifdef CONFIG_MAC80211_DEBUGFS
359 struct sta_info_debugfsdentries {
360 struct dentry *dir;
Johannes Berg63044e92008-10-07 12:04:29 +0200361 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700362 } debugfs;
363#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200364
Johannes Berg99ba2a12010-11-24 08:10:06 +0100365 unsigned int lost_packets;
Paul Stewarta85e1d52011-12-09 11:01:49 -0800366 unsigned int beacon_loss_count;
Johannes Berg99ba2a12010-11-24 08:10:06 +0100367
Johannes Berg17741cd2008-09-11 00:02:02 +0200368 /* keep last! */
369 struct ieee80211_sta sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700370};
371
Javier Cardona57cf8042011-05-13 10:45:43 -0700372static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100373{
374#ifdef CONFIG_MAC80211_MESH
375 return sta->plink_state;
376#endif
Javier Cardona57cf8042011-05-13 10:45:43 -0700377 return NL80211_PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100378}
379
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200380static inline void set_sta_flag(struct sta_info *sta,
381 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200382{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100383 WARN_ON(flag == WLAN_STA_AUTH ||
384 flag == WLAN_STA_ASSOC ||
385 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200386 set_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200387}
388
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200389static inline void clear_sta_flag(struct sta_info *sta,
390 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200391{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100392 WARN_ON(flag == WLAN_STA_AUTH ||
393 flag == WLAN_STA_ASSOC ||
394 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200395 clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200396}
397
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200398static inline int test_sta_flag(struct sta_info *sta,
399 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200400{
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200401 return test_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200402}
403
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200404static inline int test_and_clear_sta_flag(struct sta_info *sta,
405 enum ieee80211_sta_info_flags flag)
Johannes Berg07346f812008-05-03 01:02:02 +0200406{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100407 WARN_ON(flag == WLAN_STA_AUTH ||
408 flag == WLAN_STA_ASSOC ||
409 flag == WLAN_STA_AUTHORIZED);
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200410 return test_and_clear_bit(flag, &sta->_flags);
Johannes Berg07346f812008-05-03 01:02:02 +0200411}
412
Johannes Berge7f4a942011-11-04 11:18:20 +0100413static inline int test_and_set_sta_flag(struct sta_info *sta,
414 enum ieee80211_sta_info_flags flag)
415{
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100416 WARN_ON(flag == WLAN_STA_AUTH ||
417 flag == WLAN_STA_ASSOC ||
418 flag == WLAN_STA_AUTHORIZED);
Johannes Berge7f4a942011-11-04 11:18:20 +0100419 return test_and_set_bit(flag, &sta->_flags);
420}
421
Johannes Berg83d5cc02012-01-12 09:31:10 +0100422int sta_info_move_state(struct sta_info *sta,
423 enum ieee80211_sta_state new_state);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100424
Johannes Berg83d5cc02012-01-12 09:31:10 +0100425static inline void sta_info_pre_move_state(struct sta_info *sta,
426 enum ieee80211_sta_state new_state)
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100427{
Johannes Berg83d5cc02012-01-12 09:31:10 +0100428 int ret;
429
430 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
431
432 ret = sta_info_move_state(sta, new_state);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100433 WARN_ON_ONCE(ret);
434}
435
436
Johannes Bergec034b22011-05-13 13:35:40 +0200437void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
438 struct tid_ampdu_tx *tid_tx);
Jiri Bencf0706e82007-05-05 11:45:53 -0700439
Johannes Berg40b275b2011-05-13 14:15:49 +0200440static inline struct tid_ampdu_tx *
441rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
442{
443 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
444 lockdep_is_held(&sta->lock) ||
445 lockdep_is_held(&sta->ampdu_mlme.mtx));
446}
Jiri Bencf0706e82007-05-05 11:45:53 -0700447
448#define STA_HASH_SIZE 256
449#define STA_HASH(sta) (sta[5])
450
451
Johannes Berg948d8872011-09-29 16:04:29 +0200452/* Maximum number of frames to buffer per power saving station per AC */
453#define STA_MAX_TX_BUFFER 64
Jiri Bencf0706e82007-05-05 11:45:53 -0700454
455/* Minimum buffered frame expiry time. If STA uses listen interval that is
456 * smaller than this value, the minimum value here is used instead. */
457#define STA_TX_BUFFER_EXPIRE (10 * HZ)
458
459/* How often station data is cleaned up (e.g., expiration of buffered frames)
460 */
461#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
462
Johannes Bergd0709a62008-02-25 16:27:46 +0100463/*
Johannes Bergabe60632009-11-25 17:46:18 +0100464 * Get a STA info, must be under RCU read lock.
Johannes Bergd0709a62008-02-25 16:27:46 +0100465 */
Johannes Bergabe60632009-11-25 17:46:18 +0100466struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
467 const u8 *addr);
468
Felix Fietkau0e5ded52010-01-08 18:10:58 +0100469struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
470 const u8 *addr);
471
Johannes Bergabe60632009-11-25 17:46:18 +0100472static inline
473void for_each_sta_info_type_check(struct ieee80211_local *local,
474 const u8 *addr,
475 struct sta_info *sta,
476 struct sta_info *nxt)
477{
478}
479
Johannes Berg7852e362012-01-20 13:55:24 +0100480#define for_each_sta_info(local, _addr, _sta, nxt) \
Guy Eilam2a33bee2011-08-17 15:18:15 +0300481 for ( /* initialise loop */ \
482 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
483 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
484 /* typecheck */ \
485 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
486 /* continue condition */ \
487 _sta; \
488 /* advance loop */ \
489 _sta = nxt, \
490 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
491 ) \
Johannes Bergabe60632009-11-25 17:46:18 +0100492 /* compare address and run code only if it matches */ \
Felix Fietkau888d04d2012-03-01 15:22:09 +0100493 if (compare_ether_addr(_sta->sta.addr, (_addr)) == 0)
Johannes Bergabe60632009-11-25 17:46:18 +0100494
Johannes Bergd0709a62008-02-25 16:27:46 +0100495/*
496 * Get STA info by index, BROKEN!
497 */
Johannes Berg3b53fde82009-11-16 12:00:37 +0100498struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
499 int idx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100500/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100501 * Create a new STA info, caller owns returned structure
502 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100503 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100504struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
Johannes Berg56544162011-12-14 13:28:46 +0100505 const u8 *addr, gfp_t gfp);
Johannes Bergd9a7ddb2011-12-14 12:35:30 +0100506
507void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
508
Johannes Berg73651ee2008-02-25 16:27:47 +0100509/*
510 * Insert STA info into hash table/list, returns zero or a
511 * -EEXIST if (if the same MAC address is already present).
512 *
Johannes Berg34e89502010-02-03 13:59:58 +0100513 * Calling the non-rcu version makes the caller relinquish,
514 * the _rcu version calls read_lock_rcu() and must be called
515 * without it held.
Johannes Berg73651ee2008-02-25 16:27:47 +0100516 */
517int sta_info_insert(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100518int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
Johannes Bergd0709a62008-02-25 16:27:46 +0100519
Johannes Berg83d5cc02012-01-12 09:31:10 +0100520int __must_check __sta_info_destroy(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100521int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
522 const u8 *addr);
523int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
524 const u8 *addr);
525
Johannes Bergc868cb352011-09-29 16:04:27 +0200526void sta_info_recalc_tim(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100527
Jiri Bencf0706e82007-05-05 11:45:53 -0700528void sta_info_init(struct ieee80211_local *local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700529void sta_info_stop(struct ieee80211_local *local);
Johannes Berg44213b52008-02-25 16:27:49 +0100530int sta_info_flush(struct ieee80211_local *local,
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200531 struct ieee80211_sub_if_data *sdata);
Thomas Pedersen6b62bf32012-03-05 15:31:48 -0800532void sta_set_rate_info_tx(struct sta_info *sta,
533 const struct ieee80211_tx_rate *rate,
534 struct rate_info *rinfo);
Johannes Berg24723d12008-09-11 00:01:46 +0200535void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
536 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100537
Johannes Bergaf818582009-11-06 11:35:50 +0100538void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
539void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
Johannes Berg47086fc2011-09-29 16:04:33 +0200540void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
Johannes Bergaf818582009-11-06 11:35:50 +0100541
Jiri Bencf0706e82007-05-05 11:45:53 -0700542#endif /* STA_INFO_H */