2 * Copyright 2002-2005, Devicescape Software, Inc.
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.
12 #include <linux/list.h>
13 #include <linux/types.h>
14 #include <linux/if_ether.h>
15 #include <linux/kref.h>
16 #include "ieee80211_key.h"
18 /* Stations flags (struct sta_info::flags) */
19 #define WLAN_STA_AUTH BIT(0)
20 #define WLAN_STA_ASSOC BIT(1)
21 #define WLAN_STA_PS BIT(2)
22 #define WLAN_STA_TIM BIT(3) /* TIM bit is on for PS stations */
23 #define WLAN_STA_PERM BIT(4) /* permanent; do not remove entry on expiration */
24 #define WLAN_STA_AUTHORIZED BIT(5) /* If 802.1X is used, this flag is
25 * controlling whether STA is authorized to
26 * send and receive non-IEEE 802.1X frames
28 #define WLAN_STA_SHORT_PREAMBLE BIT(7)
29 /* whether this is an AP that we are associated with as a client */
30 #define WLAN_STA_ASSOC_AP BIT(8)
31 #define WLAN_STA_WME BIT(9)
32 #define WLAN_STA_WDS BIT(27)
34 #define STA_TID_NUM 16
35 #define ADDBA_RESP_INTERVAL HZ
36 #define HT_AGG_MAX_RETRIES (0x3)
38 #define HT_AGG_STATE_INITIATOR_SHIFT (4)
40 #define HT_ADDBA_REQUESTED_MSK BIT(0)
41 #define HT_ADDBA_DRV_READY_MSK BIT(1)
42 #define HT_ADDBA_RECEIVED_MSK BIT(2)
43 #define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3)
44 #define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT)
45 #define HT_AGG_STATE_IDLE (0x0)
46 #define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
47 HT_ADDBA_DRV_READY_MSK | \
48 HT_ADDBA_RECEIVED_MSK)
51 * struct tid_ampdu_tx - TID aggregation information (Tx).
53 * @state: TID's state in session state machine.
54 * @dialog_token: dialog token for aggregation session
55 * @ssn: Starting Sequence Number expected to be aggregated.
56 * @addba_resp_timer: timer for peer's response to addba request
57 * @addba_req_num: number of times addBA request has been sent.
63 struct timer_list addba_resp_timer;
68 * struct tid_ampdu_rx - TID aggregation information (Rx).
70 * @state: TID's state in session state machine.
71 * @dialog_token: dialog token for aggregation session
72 * @ssn: Starting Sequence Number expected to be aggregated.
73 * @buf_size: buffer size for incoming A-MPDUs
74 * @timeout: reset timer value.
75 * @head_seq_num: head sequence number in reordering buffer.
76 * @stored_mpdu_num: number of MPDUs in reordering buffer
77 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
78 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
88 struct sk_buff **reorder_buf;
89 struct timer_list session_timer;
93 * struct sta_ampdu_mlme - STA aggregation information.
95 * @tid_rx: aggregation info for Rx per TID
96 * @tid_tx: aggregation info for Tx per TID
97 * @ampdu_rx: for locking sections in aggregation Rx flow
98 * @ampdu_tx: for locking sectionsi in aggregation Tx flow
99 * @dialog_token_allocator: dialog token enumerator for each new session;
101 struct sta_ampdu_mlme {
102 struct tid_ampdu_rx tid_rx[STA_TID_NUM];
103 struct tid_ampdu_tx tid_tx[STA_TID_NUM];
106 u8 dialog_token_allocator;
111 struct list_head list;
112 struct sta_info *hnext; /* next entry in hash table list */
114 struct ieee80211_local *local;
117 u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */
118 u32 flags; /* WLAN_STA_ */
120 struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in
121 * power saving state */
122 int pspoll; /* whether STA has send a PS Poll frame */
123 struct sk_buff_head tx_filtered; /* buffer of TX frames that were
124 * already given to low-level driver,
125 * but were filtered */
128 unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */
129 unsigned long rx_bytes, tx_bytes;
130 unsigned long tx_retry_failed, tx_retry_count;
131 unsigned long tx_filtered_count;
133 unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */
135 unsigned long last_rx;
136 /* bitmap of supported rates per band */
137 u64 supp_rates[IEEE80211_NUM_BANDS];
139 /* last rates used to send a frame to this STA */
140 int last_txrate_idx, last_nonerp_txrate_idx;
142 struct net_device *dev; /* which net device is this station associated
145 struct ieee80211_key *key;
147 u32 tx_num_consecutive_failures;
149 u32 tx_num_mpdu_fail;
151 struct rate_control_ref *rate_ctrl;
152 void *rate_ctrl_priv;
154 /* last received seq/frag number from this STA (per RX queue) */
155 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
156 unsigned long num_duplicates; /* number of duplicate frames received
158 unsigned long tx_fragments; /* number of transmitted MPDUs */
159 unsigned long rx_fragments; /* number of received MPDUs */
160 unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
162 int last_rssi; /* RSSI of last received frame from this STA */
163 int last_signal; /* signal of last received frame from this STA */
164 int last_noise; /* noise of last received frame from this STA */
165 int last_ack_rssi[3]; /* RSSI of last received ACKs from this STA */
166 unsigned long last_ack;
170 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
171 unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
172 unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
173 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
177 struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities
179 struct sta_ampdu_mlme ampdu_mlme;
180 u8 timer_to_tid[STA_TID_NUM]; /* convert timer id to tid */
181 u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */
183 #ifdef CONFIG_MAC80211_DEBUGFS
184 struct sta_info_debugfsdentries {
186 struct dentry *flags;
187 struct dentry *num_ps_buf_frames;
188 struct dentry *last_ack_rssi;
189 struct dentry *last_ack_ms;
190 struct dentry *inactive_ms;
191 struct dentry *last_seq_ctrl;
192 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
193 struct dentry *wme_rx_queue;
194 struct dentry *wme_tx_queue;
196 struct dentry *agg_status;
202 /* Maximum number of concurrently registered stations */
203 #define MAX_STA_COUNT 2007
205 #define STA_HASH_SIZE 256
206 #define STA_HASH(sta) (sta[5])
209 /* Maximum number of frames to buffer per power saving station */
210 #define STA_MAX_TX_BUFFER 128
212 /* Minimum buffered frame expiry time. If STA uses listen interval that is
213 * smaller than this value, the minimum value here is used instead. */
214 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
216 /* How often station data is cleaned up (e.g., expiration of buffered frames)
218 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
220 static inline void __sta_info_get(struct sta_info *sta)
222 kref_get(&sta->kref);
225 struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
226 void sta_info_put(struct sta_info *sta);
227 struct sta_info * sta_info_add(struct ieee80211_local *local,
228 struct net_device *dev, u8 *addr, gfp_t gfp);
229 void sta_info_remove(struct sta_info *sta);
230 void sta_info_free(struct sta_info *sta);
231 void sta_info_init(struct ieee80211_local *local);
232 int sta_info_start(struct ieee80211_local *local);
233 void sta_info_stop(struct ieee80211_local *local);
234 void sta_info_remove_aid_ptr(struct sta_info *sta);
235 void sta_info_flush(struct ieee80211_local *local, struct net_device *dev);
237 #endif /* STA_INFO_H */