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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 *
22 * These flags are used with &struct sta_info's @flags member.
23 *
24 * @WLAN_STA_AUTH: Station is authenticated.
25 * @WLAN_STA_ASSOC: Station is associated.
Johannes Bergaf818582009-11-06 11:35:50 +010026 * @WLAN_STA_PS_STA: Station is in power-save mode
Johannes Berg238814f2008-01-28 17:19:37 +010027 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
28 * This bit is always checked so needs to be enabled for all stations
29 * when virtual port control is not in use.
30 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
31 * frames.
32 * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP.
33 * @WLAN_STA_WME: Station is a QoS-STA.
34 * @WLAN_STA_WDS: Station is one of our WDS peers.
Johannes Bergd46e1442008-02-20 23:59:33 +010035 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
Johannes Berge039fa42008-05-15 12:55:29 +020036 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
Johannes Bergd46e1442008-02-20 23:59:33 +010037 * frame to this station is transmitted.
Jouni Malinen5394af42009-01-08 13:31:59 +020038 * @WLAN_STA_MFP: Management frame protection is used with this STA.
Johannes Berg618f3562010-04-06 11:18:46 +020039 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
Johannes Berg098a6072010-04-06 11:18:47 +020040 * during suspend/resume and station removal.
Johannes Bergaf818582009-11-06 11:35:50 +010041 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
42 * power-save mode logically to flush frames that might still
43 * be in the queues
44 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
45 * station in power-save mode, reply when the driver unblocks.
Felix Fietkaudcf55fb2011-04-17 17:45:00 +020046 * @WLAN_STA_PS_DRIVER_BUF: Station has frames pending in driver internal
47 * buffers. Automatically cleared on station wake-up.
Johannes Berg238814f2008-01-28 17:19:37 +010048 */
49enum ieee80211_sta_info_flags {
50 WLAN_STA_AUTH = 1<<0,
51 WLAN_STA_ASSOC = 1<<1,
Johannes Bergaf818582009-11-06 11:35:50 +010052 WLAN_STA_PS_STA = 1<<2,
Johannes Berg836341a2008-02-20 02:07:21 +010053 WLAN_STA_AUTHORIZED = 1<<3,
54 WLAN_STA_SHORT_PREAMBLE = 1<<4,
55 WLAN_STA_ASSOC_AP = 1<<5,
56 WLAN_STA_WME = 1<<6,
57 WLAN_STA_WDS = 1<<7,
Johannes Bergd46e1442008-02-20 23:59:33 +010058 WLAN_STA_CLEAR_PS_FILT = 1<<9,
Jouni Malinen5394af42009-01-08 13:31:59 +020059 WLAN_STA_MFP = 1<<10,
Johannes Berg618f3562010-04-06 11:18:46 +020060 WLAN_STA_BLOCK_BA = 1<<11,
Johannes Bergaf818582009-11-06 11:35:50 +010061 WLAN_STA_PS_DRIVER = 1<<12,
62 WLAN_STA_PSPOLL = 1<<13,
Felix Fietkaudcf55fb2011-04-17 17:45:00 +020063 WLAN_STA_PS_DRIVER_BUF = 1<<14,
Johannes Berg238814f2008-01-28 17:19:37 +010064};
Jiri Bencf0706e82007-05-05 11:45:53 -070065
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020066#define STA_TID_NUM 16
67#define ADDBA_RESP_INTERVAL HZ
Johannes Berga622ab72010-06-10 10:21:39 +020068#define HT_AGG_MAX_RETRIES 0x3
Ron Rindjunsky5aae2882007-12-25 17:00:32 +020069
Johannes Berga622ab72010-06-10 10:21:39 +020070#define HT_AGG_STATE_DRV_READY 0
71#define HT_AGG_STATE_RESPONSE_RECEIVED 1
72#define HT_AGG_STATE_OPERATIONAL 2
73#define HT_AGG_STATE_STOPPING 3
Johannes Berg0ab33702010-06-10 10:21:42 +020074#define HT_AGG_STATE_WANT_START 4
75#define HT_AGG_STATE_WANT_STOP 5
Ron Rindjunsky80656c22008-01-28 14:07:16 +020076
77/**
78 * struct tid_ampdu_tx - TID aggregation information (Tx).
79 *
Johannes Berga622ab72010-06-10 10:21:39 +020080 * @rcu_head: rcu head for freeing structure
Ron Rindjunsky80656c22008-01-28 14:07:16 +020081 * @addba_resp_timer: timer for peer's response to addba request
Johannes Bergcd8ffc82009-03-23 17:28:41 +010082 * @pending: pending frames queue -- use sta's spinlock to protect
Ron Rindjunskycee24a32008-03-26 20:36:03 +020083 * @dialog_token: dialog token for aggregation session
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +053084 * @timeout: session timeout value to be filled in ADDBA requests
Johannes Berga622ab72010-06-10 10:21:39 +020085 * @state: session state (see above)
86 * @stop_initiator: initiator of a session stop
Johannes Berg53f73c02010-10-05 19:37:40 +020087 * @tx_stop: TX DelBA frame when stopping
Johannes Berg0b01f032011-01-18 13:51:05 +010088 * @buf_size: reorder buffer size at receiver
Johannes Berga622ab72010-06-10 10:21:39 +020089 *
Johannes Bergdd318572010-11-29 11:09:16 +010090 * This structure's lifetime is managed by RCU, assignments to
91 * the array holding it must hold the aggregation mutex.
92 *
93 * The TX path can access it under RCU lock-free if, and
94 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
95 * set. Otherwise, the TX path must also acquire the spinlock
96 * and re-check the state, see comments in the tx code
97 * touching it.
Ron Rindjunsky80656c22008-01-28 14:07:16 +020098 */
99struct tid_ampdu_tx {
Johannes Berga622ab72010-06-10 10:21:39 +0200100 struct rcu_head rcu_head;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200101 struct timer_list addba_resp_timer;
Johannes Bergcd8ffc82009-03-23 17:28:41 +0100102 struct sk_buff_head pending;
Johannes Berga622ab72010-06-10 10:21:39 +0200103 unsigned long state;
Sujith Manoharanbd2ce6e2010-12-15 07:47:10 +0530104 u16 timeout;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200105 u8 dialog_token;
Johannes Berga622ab72010-06-10 10:21:39 +0200106 u8 stop_initiator;
Johannes Berg53f73c02010-10-05 19:37:40 +0200107 bool tx_stop;
Johannes Berg0b01f032011-01-18 13:51:05 +0100108 u8 buf_size;
Ron Rindjunsky80656c22008-01-28 14:07:16 +0200109};
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200110
111/**
112 * struct tid_ampdu_rx - TID aggregation information (Rx).
113 *
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200114 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
Jouni Malinen4d050f12009-05-05 20:35:14 +0300115 * @reorder_time: jiffies when skb was added
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200116 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200117 * @reorder_timer: releases expired frames from the reorder buffer.
Johannes Berg056cdd52008-03-26 23:21:47 +0100118 * @head_seq_num: head sequence number in reordering buffer.
119 * @stored_mpdu_num: number of MPDUs in reordering buffer
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200120 * @ssn: Starting Sequence Number expected to be aggregated.
121 * @buf_size: buffer size for incoming A-MPDUs
Johannes Berg20ad19d2009-02-10 21:25:45 +0100122 * @timeout: reset timer value (in TUs).
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200123 * @dialog_token: dialog token for aggregation session
Johannes Berga87f7362010-06-10 10:21:38 +0200124 * @rcu_head: RCU head used for freeing this struct
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200125 * @reorder_lock: serializes access to reorder buffer, see below.
Johannes Berga87f7362010-06-10 10:21:38 +0200126 *
Johannes Bergdd318572010-11-29 11:09:16 +0100127 * This structure's lifetime is managed by RCU, assignments to
128 * the array holding it must hold the aggregation mutex.
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200129 *
Johannes Bergdd318572010-11-29 11:09:16 +0100130 * The @reorder_lock is used to protect the members of this
131 * struct, except for @timeout, @buf_size and @dialog_token,
132 * which are constant across the lifetime of the struct (the
133 * dialog token being used only for debugging).
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200134 */
135struct tid_ampdu_rx {
Johannes Berga87f7362010-06-10 10:21:38 +0200136 struct rcu_head rcu_head;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200137 spinlock_t reorder_lock;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200138 struct sk_buff **reorder_buf;
Jouni Malinen4d050f12009-05-05 20:35:14 +0300139 unsigned long *reorder_time;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200140 struct timer_list session_timer;
Christian Lamparter2bff8eb2010-08-05 01:36:41 +0200141 struct timer_list reorder_timer;
Johannes Berg056cdd52008-03-26 23:21:47 +0100142 u16 head_seq_num;
143 u16 stored_mpdu_num;
Ron Rindjunskycee24a32008-03-26 20:36:03 +0200144 u16 ssn;
145 u16 buf_size;
146 u16 timeout;
147 u8 dialog_token;
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200148};
149
Luis Carlos Cobob4e08ea2008-02-29 15:46:08 -0800150/**
Johannes Bergfcea6002010-05-31 11:40:23 +0200151 * struct sta_ampdu_mlme - STA aggregation information.
152 *
Johannes Berga87f7362010-06-10 10:21:38 +0200153 * @tid_rx: aggregation info for Rx per TID -- RCU protected
Johannes Bergfcea6002010-05-31 11:40:23 +0200154 * @tid_tx: aggregation info for Tx per TID
Johannes Bergec034b22011-05-13 13:35:40 +0200155 * @tid_start_tx: sessions where start was requested
Johannes Bergfcea6002010-05-31 11:40:23 +0200156 * @addba_req_num: number of times addBA request has been sent.
157 * @dialog_token_allocator: dialog token enumerator for each new session;
Johannes Berg0ab33702010-06-10 10:21:42 +0200158 * @work: work struct for starting/stopping aggregation
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200159 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
160 * RX timer expired until the work for it runs
Shahar Levif41ccd72011-05-22 16:10:21 +0300161 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
162 * driver requested to close until the work for it runs
Johannes Berga93e3642010-06-10 10:21:46 +0200163 * @mtx: mutex to protect all TX data (except non-NULL assignments
164 * to tid_tx[idx], which are protected by the sta spinlock)
Johannes Bergfcea6002010-05-31 11:40:23 +0200165 */
166struct sta_ampdu_mlme {
Johannes Berga93e3642010-06-10 10:21:46 +0200167 struct mutex mtx;
Johannes Bergfcea6002010-05-31 11:40:23 +0200168 /* rx */
Johannes Berg40b275b2011-05-13 14:15:49 +0200169 struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200170 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
Shahar Levif41ccd72011-05-22 16:10:21 +0300171 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)];
Johannes Bergfcea6002010-05-31 11:40:23 +0200172 /* tx */
Johannes Berg0ab33702010-06-10 10:21:42 +0200173 struct work_struct work;
Johannes Berg40b275b2011-05-13 14:15:49 +0200174 struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
Johannes Bergec034b22011-05-13 13:35:40 +0200175 struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
Johannes Bergfcea6002010-05-31 11:40:23 +0200176 u8 addba_req_num[STA_TID_NUM];
177 u8 dialog_token_allocator;
178};
179
180
181/**
Johannes Berg693b1bb2008-02-25 16:27:48 +0100182 * struct sta_info - STA information
183 *
184 * This structure collects information about a station that
185 * mac80211 is communicating with.
186 *
187 * @list: global linked list entry
188 * @hnext: hash table linked list pointer
189 * @local: pointer to the global information
Johannes Berge25cf4a2008-10-23 08:51:20 +0200190 * @sdata: virtual interface this station belongs to
Johannes Berge31b8212010-10-05 19:39:30 +0200191 * @ptk: peer key negotiated with this station, if any
192 * @gtk: group keys negotiated with this station, if any
Johannes Berge25cf4a2008-10-23 08:51:20 +0200193 * @rate_ctrl: rate control algorithm reference
194 * @rate_ctrl_priv: rate control private per-STA pointer
195 * @last_tx_rate: rate used for last transmit, to report to userspace as
196 * "the" transmit rate
Felix Fietkau3af63342011-02-27 22:08:01 +0100197 * @last_rx_rate_idx: rx status rate index of the last data packet
198 * @last_rx_rate_flag: rx status flag of the last data packet
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700199 * @lock: used for locking all fields that require locking, see comments
200 * in the header file.
201 * @flaglock: spinlock for flags accesses
Jaswinder Singh Rajput841507f2009-11-22 13:47:58 +0530202 * @drv_unblock_wk: used for driver PS unblocking
Johannes Berge25cf4a2008-10-23 08:51:20 +0200203 * @listen_interval: listen interval of this station, when we're acting as AP
Johannes Berg693b1bb2008-02-25 16:27:48 +0100204 * @flags: STA flags, see &enum ieee80211_sta_info_flags
205 * @ps_tx_buf: buffer of frames to transmit to this station
206 * when it leaves power saving state
207 * @tx_filtered: buffer of frames we already tried to transmit
208 * but were filtered by hardware due to STA having entered
209 * power saving state
210 * @rx_packets: Number of MSDUs received from this STA
211 * @rx_bytes: Number of bytes received from this STA
Johannes Berge25cf4a2008-10-23 08:51:20 +0200212 * @wep_weak_iv_count: number of weak WEP IVs received from this station
213 * @last_rx: time (in jiffies) when last frame was received from this STA
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530214 * @last_connected: time (in seconds) when a station got connected
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700215 * @num_duplicates: number of duplicate frames received from this STA
216 * @rx_fragments: number of received MPDUs
217 * @rx_dropped: number of dropped MPDUs from this STA
218 * @last_signal: signal of last received frame from this STA
Bruno Randolf541a45a2010-12-02 19:12:43 +0900219 * @avg_signal: moving average of signal of received frames from this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700220 * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
Johannes Berge25cf4a2008-10-23 08:51:20 +0200221 * @tx_filtered_count: number of frames the hardware filtered for this STA
222 * @tx_retry_failed: number of frames that failed retry
223 * @tx_retry_count: total number of retries for frames to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700224 * @fail_avg: moving percentage of failed MSDUs
225 * @tx_packets: number of RX/TX MSDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200226 * @tx_bytes: number of bytes transmitted to this STA
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700227 * @tx_fragments: number of transmitted MPDUs
Johannes Berge25cf4a2008-10-23 08:51:20 +0200228 * @tid_seq: per-TID sequence numbers for sending to this STA
229 * @ampdu_mlme: A-MPDU state machine state
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700230 * @timer_to_tid: identity mapping to ID timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700231 * @llid: Local link ID
232 * @plid: Peer link ID
233 * @reason: Cancel reason on PLINK_HOLDING state
234 * @plink_retries: Retries in establishment
Johannes Berge25cf4a2008-10-23 08:51:20 +0200235 * @ignore_plink_timer: ignore the peer-link timer (used internally)
236 * @plink_state: peer link state
237 * @plink_timeout: timeout of peer link
238 * @plink_timer: peer link watch timer
Johannes Bergcce4c772009-05-19 10:39:34 +0200239 * @plink_timer_was_running: used by suspend/resume to restore timers
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700240 * @debugfs: debug filesystem info
Johannes Bergaf818582009-11-06 11:35:50 +0100241 * @dead: set to true when sta is unlinked
Johannes Berg34e89502010-02-03 13:59:58 +0100242 * @uploaded: set to true when sta is uploaded to the driver
Johannes Berg99ba2a12010-11-24 08:10:06 +0100243 * @lost_packets: number of consecutive lost packets
Guy Eilam2a33bee2011-08-17 15:18:15 +0300244 * @dummy: indicate a dummy station created for receiving
245 * EAP frames before association
246 * @sta: station information we share with the driver
Johannes Berg693b1bb2008-02-25 16:27:48 +0100247 */
Jiri Bencf0706e82007-05-05 11:45:53 -0700248struct sta_info {
Johannes Berg693b1bb2008-02-25 16:27:48 +0100249 /* General information, mostly static */
Jiri Bencf0706e82007-05-05 11:45:53 -0700250 struct list_head list;
Johannes Berg40b275b2011-05-13 14:15:49 +0200251 struct sta_info __rcu *hnext;
Jiri Bencf0706e82007-05-05 11:45:53 -0700252 struct ieee80211_local *local;
Johannes Bergd0709a62008-02-25 16:27:46 +0100253 struct ieee80211_sub_if_data *sdata;
Johannes Berg40b275b2011-05-13 14:15:49 +0200254 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
255 struct ieee80211_key __rcu *ptk;
Jiri Bencf0706e82007-05-05 11:45:53 -0700256 struct rate_control_ref *rate_ctrl;
257 void *rate_ctrl_priv;
Johannes Berg07346f812008-05-03 01:02:02 +0200258 spinlock_t lock;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200259 spinlock_t flaglock;
Johannes Berg17741cd2008-09-11 00:02:02 +0200260
Johannes Bergaf818582009-11-06 11:35:50 +0100261 struct work_struct drv_unblock_wk;
262
Jiri Bencf0706e82007-05-05 11:45:53 -0700263 u16 listen_interval;
Jiri Bence9f207f2007-05-05 11:46:38 -0700264
Johannes Bergaf818582009-11-06 11:35:50 +0100265 bool dead;
266
Johannes Berg34e89502010-02-03 13:59:58 +0100267 bool uploaded;
Johannes Bergd0709a62008-02-25 16:27:46 +0100268
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200269 /*
270 * frequently updated, locked with own spinlock (flaglock),
271 * use the accessors defined below
272 */
Johannes Berg693b1bb2008-02-25 16:27:48 +0100273 u32 flags;
274
275 /*
276 * STA powersave frame queues, no more than the internal
277 * locking required.
278 */
279 struct sk_buff_head ps_tx_buf;
280 struct sk_buff_head tx_filtered;
281
282 /* Updated from RX path only, no locking requirements */
283 unsigned long rx_packets, rx_bytes;
284 unsigned long wep_weak_iv_count;
285 unsigned long last_rx;
Mohammed Shafi Shajakhanebe27c92011-04-08 21:24:24 +0530286 long last_connected;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700287 unsigned long num_duplicates;
288 unsigned long rx_fragments;
289 unsigned long rx_dropped;
290 int last_signal;
Bruno Randolf541a45a2010-12-02 19:12:43 +0900291 struct ewma avg_signal;
Johannes Berg9e262972011-07-07 18:45:03 +0200292 /* Plus 1 for non-QoS frames */
293 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100294
295 /* Updated from TX status path only, no locking requirements */
296 unsigned long tx_filtered_count;
297 unsigned long tx_retry_failed, tx_retry_count;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100298 /* moving percentage of failed MSDUs */
299 unsigned int fail_avg;
300
301 /* Updated from TX path only, no locking requirements */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700302 unsigned long tx_packets;
Johannes Berg693b1bb2008-02-25 16:27:48 +0100303 unsigned long tx_bytes;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700304 unsigned long tx_fragments;
Johannes Berge6a98542008-10-21 12:40:02 +0200305 struct ieee80211_tx_rate last_tx_rate;
Felix Fietkau3af63342011-02-27 22:08:01 +0100306 int last_rx_rate_idx;
307 int last_rx_rate_flag;
Johannes Bergf591fa52008-07-10 11:21:26 +0200308 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100309
Johannes Berg693b1bb2008-02-25 16:27:48 +0100310 /*
Johannes Berg07346f812008-05-03 01:02:02 +0200311 * Aggregation information, locked with lock.
Johannes Berg693b1bb2008-02-25 16:27:48 +0100312 */
Ron Rindjunsky5aae2882007-12-25 17:00:32 +0200313 struct sta_ampdu_mlme ampdu_mlme;
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700314 u8 timer_to_tid[STA_TID_NUM];
Johannes Berg693b1bb2008-02-25 16:27:48 +0100315
Luis Carlos Coboee385852008-02-23 15:17:11 +0100316#ifdef CONFIG_MAC80211_MESH
Johannes Berg693b1bb2008-02-25 16:27:48 +0100317 /*
318 * Mesh peer link attributes
319 * TODO: move to a sub-structure that is referenced with pointer?
320 */
Randy Dunlap6ef307b2008-07-03 13:52:18 -0700321 __le16 llid;
322 __le16 plid;
323 __le16 reason;
324 u8 plink_retries;
Johannes Berg74958832008-02-25 22:17:30 +0100325 bool ignore_plink_timer;
Johannes Berg5bb644a2009-05-17 11:40:42 +0200326 bool plink_timer_was_running;
Javier Cardona57cf8042011-05-13 10:45:43 -0700327 enum nl80211_plink_state plink_state;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100328 u32 plink_timeout;
329 struct timer_list plink_timer;
Luis Carlos Coboee385852008-02-23 15:17:11 +0100330#endif
Ron Rindjunsky10816d42007-11-26 16:14:30 +0200331
Jiri Bence9f207f2007-05-05 11:46:38 -0700332#ifdef CONFIG_MAC80211_DEBUGFS
333 struct sta_info_debugfsdentries {
334 struct dentry *dir;
Johannes Berg63044e92008-10-07 12:04:29 +0200335 bool add_has_run;
Jiri Bence9f207f2007-05-05 11:46:38 -0700336 } debugfs;
337#endif
Johannes Berg17741cd2008-09-11 00:02:02 +0200338
Johannes Berg99ba2a12010-11-24 08:10:06 +0100339 unsigned int lost_packets;
340
Guy Eilam2a33bee2011-08-17 15:18:15 +0300341 /* should be right in front of sta to be in the same cache line */
342 bool dummy;
343
Johannes Berg17741cd2008-09-11 00:02:02 +0200344 /* keep last! */
345 struct ieee80211_sta sta;
Jiri Bencf0706e82007-05-05 11:45:53 -0700346};
347
Javier Cardona57cf8042011-05-13 10:45:43 -0700348static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100349{
350#ifdef CONFIG_MAC80211_MESH
351 return sta->plink_state;
352#endif
Javier Cardona57cf8042011-05-13 10:45:43 -0700353 return NL80211_PLINK_LISTEN;
Johannes Bergd6d1a5a2008-02-25 16:24:38 +0100354}
355
Johannes Berg07346f812008-05-03 01:02:02 +0200356static inline void set_sta_flags(struct sta_info *sta, const u32 flags)
357{
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200358 unsigned long irqfl;
359
360 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200361 sta->flags |= flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200362 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200363}
364
365static inline void clear_sta_flags(struct sta_info *sta, const u32 flags)
366{
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200367 unsigned long irqfl;
368
369 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200370 sta->flags &= ~flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200371 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200372}
373
Johannes Berg07346f812008-05-03 01:02:02 +0200374static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags)
375{
376 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200377 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200378
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200379 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200380 ret = sta->flags & flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200381 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200382
383 return ret;
384}
385
386static inline u32 test_and_clear_sta_flags(struct sta_info *sta,
387 const u32 flags)
388{
389 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200390 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200391
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200392 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200393 ret = sta->flags & flags;
394 sta->flags &= ~flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200395 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200396
397 return ret;
398}
399
400static inline u32 get_sta_flags(struct sta_info *sta)
401{
402 u32 ret;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200403 unsigned long irqfl;
Johannes Berg07346f812008-05-03 01:02:02 +0200404
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200405 spin_lock_irqsave(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200406 ret = sta->flags;
Johannes Berg5a9f7b02008-06-18 14:58:09 +0200407 spin_unlock_irqrestore(&sta->flaglock, irqfl);
Johannes Berg07346f812008-05-03 01:02:02 +0200408
409 return ret;
410}
411
Johannes Bergec034b22011-05-13 13:35:40 +0200412void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
413 struct tid_ampdu_tx *tid_tx);
Jiri Bencf0706e82007-05-05 11:45:53 -0700414
Johannes Berg40b275b2011-05-13 14:15:49 +0200415static inline struct tid_ampdu_tx *
416rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
417{
418 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
419 lockdep_is_held(&sta->lock) ||
420 lockdep_is_held(&sta->ampdu_mlme.mtx));
421}
Jiri Bencf0706e82007-05-05 11:45:53 -0700422
423#define STA_HASH_SIZE 256
424#define STA_HASH(sta) (sta[5])
425
426
427/* Maximum number of frames to buffer per power saving station */
428#define STA_MAX_TX_BUFFER 128
429
430/* Minimum buffered frame expiry time. If STA uses listen interval that is
431 * smaller than this value, the minimum value here is used instead. */
432#define STA_TX_BUFFER_EXPIRE (10 * HZ)
433
434/* How often station data is cleaned up (e.g., expiration of buffered frames)
435 */
436#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
437
Johannes Bergd0709a62008-02-25 16:27:46 +0100438/*
Johannes Bergabe60632009-11-25 17:46:18 +0100439 * Get a STA info, must be under RCU read lock.
Johannes Bergd0709a62008-02-25 16:27:46 +0100440 */
Johannes Bergabe60632009-11-25 17:46:18 +0100441struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
442 const u8 *addr);
443
Guy Eilam2a33bee2011-08-17 15:18:15 +0300444struct sta_info *sta_info_get_rx(struct ieee80211_sub_if_data *sdata,
445 const u8 *addr);
446
Felix Fietkau0e5ded52010-01-08 18:10:58 +0100447struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
448 const u8 *addr);
449
Guy Eilam2a33bee2011-08-17 15:18:15 +0300450struct sta_info *sta_info_get_bss_rx(struct ieee80211_sub_if_data *sdata,
451 const u8 *addr);
452
Johannes Bergabe60632009-11-25 17:46:18 +0100453static inline
454void for_each_sta_info_type_check(struct ieee80211_local *local,
455 const u8 *addr,
456 struct sta_info *sta,
457 struct sta_info *nxt)
458{
459}
460
Felix Fietkau38bdb652010-06-25 01:44:33 +0200461#define for_each_sta_info(local, _addr, _sta, nxt) \
Johannes Bergabe60632009-11-25 17:46:18 +0100462 for ( /* initialise loop */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200463 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
464 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
Johannes Bergabe60632009-11-25 17:46:18 +0100465 /* typecheck */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200466 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
Johannes Bergabe60632009-11-25 17:46:18 +0100467 /* continue condition */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200468 _sta; \
Johannes Bergabe60632009-11-25 17:46:18 +0100469 /* advance loop */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200470 _sta = nxt, \
471 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
Johannes Bergabe60632009-11-25 17:46:18 +0100472 ) \
Guy Eilam2a33bee2011-08-17 15:18:15 +0300473 /* run code only if address matches and it's not a dummy sta */ \
474 if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0 && \
475 !_sta->dummy)
476
477#define for_each_sta_info_rx(local, _addr, _sta, nxt) \
478 for ( /* initialise loop */ \
479 _sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
480 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL; \
481 /* typecheck */ \
482 for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
483 /* continue condition */ \
484 _sta; \
485 /* advance loop */ \
486 _sta = nxt, \
487 nxt = _sta ? rcu_dereference(_sta->hnext) : NULL \
488 ) \
Johannes Bergabe60632009-11-25 17:46:18 +0100489 /* compare address and run code only if it matches */ \
Felix Fietkau38bdb652010-06-25 01:44:33 +0200490 if (memcmp(_sta->sta.addr, (_addr), ETH_ALEN) == 0)
Johannes Bergabe60632009-11-25 17:46:18 +0100491
Johannes Bergd0709a62008-02-25 16:27:46 +0100492/*
493 * Get STA info by index, BROKEN!
494 */
Johannes Berg3b53fde82009-11-16 12:00:37 +0100495struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
496 int idx);
Johannes Bergd0709a62008-02-25 16:27:46 +0100497/*
Johannes Berg73651ee2008-02-25 16:27:47 +0100498 * Create a new STA info, caller owns returned structure
499 * until sta_info_insert().
Johannes Bergd0709a62008-02-25 16:27:46 +0100500 */
Johannes Berg73651ee2008-02-25 16:27:47 +0100501struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
502 u8 *addr, gfp_t gfp);
503/*
504 * Insert STA info into hash table/list, returns zero or a
505 * -EEXIST if (if the same MAC address is already present).
506 *
Johannes Berg34e89502010-02-03 13:59:58 +0100507 * Calling the non-rcu version makes the caller relinquish,
508 * the _rcu version calls read_lock_rcu() and must be called
509 * without it held.
Johannes Berg73651ee2008-02-25 16:27:47 +0100510 */
511int sta_info_insert(struct sta_info *sta);
Johannes Berg34e89502010-02-03 13:59:58 +0100512int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
513int sta_info_insert_atomic(struct sta_info *sta);
Guy Eilam2a33bee2011-08-17 15:18:15 +0300514int sta_info_reinsert(struct sta_info *sta);
Johannes Bergd0709a62008-02-25 16:27:46 +0100515
Johannes Berg34e89502010-02-03 13:59:58 +0100516int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
517 const u8 *addr);
518int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
519 const u8 *addr);
520
Johannes Bergd0709a62008-02-25 16:27:46 +0100521void sta_info_set_tim_bit(struct sta_info *sta);
522void sta_info_clear_tim_bit(struct sta_info *sta);
523
Jiri Bencf0706e82007-05-05 11:45:53 -0700524void sta_info_init(struct ieee80211_local *local);
Jiri Bencf0706e82007-05-05 11:45:53 -0700525void sta_info_stop(struct ieee80211_local *local);
Johannes Berg44213b52008-02-25 16:27:49 +0100526int sta_info_flush(struct ieee80211_local *local,
Johannes Bergaf8cdcd2009-04-19 21:25:43 +0200527 struct ieee80211_sub_if_data *sdata);
Johannes Berg24723d12008-09-11 00:01:46 +0200528void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
529 unsigned long exp_time);
Johannes Berg004c8722008-02-20 11:21:35 +0100530
Johannes Bergaf818582009-11-06 11:35:50 +0100531void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
532void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
533
Jiri Bencf0706e82007-05-05 11:45:53 -0700534#endif /* STA_INFO_H */