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>
18 * enum ieee80211_sta_info_flags - Stations flags
20 * These flags are used with &struct sta_info's @flags member.
22 * @WLAN_STA_AUTH: Station is authenticated.
23 * @WLAN_STA_ASSOC: Station is associated.
24 * @WLAN_STA_PS: Station is in power-save mode
25 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
26 * This bit is always checked so needs to be enabled for all stations
27 * when virtual port control is not in use.
28 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
30 * @WLAN_STA_ASSOC_AP: We're associated to that station, it is an AP.
31 * @WLAN_STA_WME: Station is a QoS-STA.
32 * @WLAN_STA_WDS: Station is one of our WDS peers.
33 * @WLAN_STA_PSPOLL: Station has just PS-polled us.
34 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
35 * IEEE80211_TXCTL_CLEAR_PS_FILT control flag) when the next
36 * frame to this station is transmitted.
38 enum ieee80211_sta_info_flags {
40 WLAN_STA_ASSOC = 1<<1,
42 WLAN_STA_AUTHORIZED = 1<<3,
43 WLAN_STA_SHORT_PREAMBLE = 1<<4,
44 WLAN_STA_ASSOC_AP = 1<<5,
47 WLAN_STA_PSPOLL = 1<<8,
48 WLAN_STA_CLEAR_PS_FILT = 1<<9,
51 #define STA_TID_NUM 16
52 #define ADDBA_RESP_INTERVAL HZ
53 #define HT_AGG_MAX_RETRIES (0x3)
55 #define HT_AGG_STATE_INITIATOR_SHIFT (4)
57 #define HT_ADDBA_REQUESTED_MSK BIT(0)
58 #define HT_ADDBA_DRV_READY_MSK BIT(1)
59 #define HT_ADDBA_RECEIVED_MSK BIT(2)
60 #define HT_AGG_STATE_REQ_STOP_BA_MSK BIT(3)
61 #define HT_AGG_STATE_INITIATOR_MSK BIT(HT_AGG_STATE_INITIATOR_SHIFT)
62 #define HT_AGG_STATE_IDLE (0x0)
63 #define HT_AGG_STATE_OPERATIONAL (HT_ADDBA_REQUESTED_MSK | \
64 HT_ADDBA_DRV_READY_MSK | \
65 HT_ADDBA_RECEIVED_MSK)
66 #define HT_AGG_STATE_DEBUGFS_CTL BIT(7)
69 * struct tid_ampdu_tx - TID aggregation information (Tx).
71 * @addba_resp_timer: timer for peer's response to addba request
72 * @ssn: Starting Sequence Number expected to be aggregated.
73 * @dialog_token: dialog token for aggregation session
76 struct timer_list addba_resp_timer;
82 * struct tid_ampdu_rx - TID aggregation information (Rx).
84 * @reorder_buf: buffer to reorder incoming aggregated MPDUs
85 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
86 * @head_seq_num: head sequence number in reordering buffer.
87 * @stored_mpdu_num: number of MPDUs in reordering buffer
88 * @ssn: Starting Sequence Number expected to be aggregated.
89 * @buf_size: buffer size for incoming A-MPDUs
90 * @timeout: reset timer value.
91 * @dialog_token: dialog token for aggregation session
94 struct sk_buff **reorder_buf;
95 struct timer_list session_timer;
105 * enum plink_state - state of a mesh peer link finite state machine
107 * @PLINK_LISTEN: initial state, considered the implicit state of non existant
109 * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer
110 * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer
111 * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh
113 * @PLINK_ESTAB: mesh peer link is established
114 * @PLINK_HOLDING: mesh peer link is being closed or cancelled
115 * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded
128 * struct sta_ampdu_mlme - STA aggregation information.
130 * @tid_state_rx: TID's state in Rx session state machine.
131 * @tid_rx: aggregation info for Rx per TID
132 * @ampdu_rx: for locking sections in aggregation Rx flow
133 * @tid_state_tx: TID's state in Tx session state machine.
134 * @tid_tx: aggregation info for Tx per TID
135 * @addba_req_num: number of times addBA request has been sent.
136 * @ampdu_tx: for locking sectionsi in aggregation Tx flow
137 * @dialog_token_allocator: dialog token enumerator for each new session;
139 struct sta_ampdu_mlme {
141 u8 tid_state_rx[STA_TID_NUM];
142 struct tid_ampdu_rx *tid_rx[STA_TID_NUM];
145 u8 tid_state_tx[STA_TID_NUM];
146 struct tid_ampdu_tx *tid_tx[STA_TID_NUM];
147 u8 addba_req_num[STA_TID_NUM];
149 u8 dialog_token_allocator;
153 /* see __sta_info_unlink */
154 #define STA_INFO_PIN_STAT_NORMAL 0
155 #define STA_INFO_PIN_STAT_PINNED 1
156 #define STA_INFO_PIN_STAT_DESTROY 2
159 * struct sta_info - STA information
161 * This structure collects information about a station that
162 * mac80211 is communicating with.
164 * @list: global linked list entry
165 * @hnext: hash table linked list pointer
166 * @local: pointer to the global information
167 * @addr: MAC address of this STA
168 * @aid: STA's unique AID (1..2007, 0 = not assigned yet),
169 * only used in AP (and IBSS?) mode
170 * @flags: STA flags, see &enum ieee80211_sta_info_flags
171 * @ps_tx_buf: buffer of frames to transmit to this station
172 * when it leaves power saving state
173 * @tx_filtered: buffer of frames we already tried to transmit
174 * but were filtered by hardware due to STA having entered
176 * @rx_packets: Number of MSDUs received from this STA
177 * @rx_bytes: Number of bytes received from this STA
178 * @supp_rates: Bitmap of supported rates (per band)
179 * @ht_info: HT capabilities of this STA
182 /* General information, mostly static */
183 struct list_head list;
184 struct sta_info *hnext;
185 struct ieee80211_local *local;
186 struct ieee80211_sub_if_data *sdata;
187 struct ieee80211_key *key;
188 struct rate_control_ref *rate_ctrl;
189 void *rate_ctrl_priv;
190 struct ieee80211_ht_info ht_info;
191 u64 supp_rates[IEEE80211_NUM_BANDS];
197 * for use by the internal lifetime management,
198 * see __sta_info_unlink
202 /* frequently updated information, needs locking? */
206 * STA powersave frame queues, no more than the internal
209 struct sk_buff_head ps_tx_buf;
210 struct sk_buff_head tx_filtered;
212 /* Updated from RX path only, no locking requirements */
213 unsigned long rx_packets, rx_bytes;
214 unsigned long wep_weak_iv_count;
215 unsigned long last_rx;
216 unsigned long num_duplicates; /* number of duplicate frames received
218 unsigned long rx_fragments; /* number of received MPDUs */
219 unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
220 int last_rssi; /* RSSI of last received frame from this STA */
221 int last_signal; /* signal of last received frame from this STA */
222 int last_noise; /* noise of last received frame from this STA */
223 /* last received seq/frag number from this STA (per RX queue) */
224 __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
225 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
226 unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
229 /* Updated from TX status path only, no locking requirements */
230 unsigned long tx_filtered_count;
231 unsigned long tx_retry_failed, tx_retry_count;
232 /* TODO: update in generic code not rate control? */
233 u32 tx_num_consecutive_failures;
235 u32 tx_num_mpdu_fail;
236 /* moving percentage of failed MSDUs */
237 unsigned int fail_avg;
239 /* Updated from TX path only, no locking requirements */
240 unsigned long tx_packets; /* number of RX/TX MSDUs */
241 unsigned long tx_bytes;
242 unsigned long tx_fragments; /* number of transmitted MPDUs */
245 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
246 unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
249 /* Debug counters, no locking doesn't matter */
254 * Aggregation information, comes with own locking.
256 struct sta_ampdu_mlme ampdu_mlme;
257 u8 timer_to_tid[STA_TID_NUM]; /* identity mapping to ID timers */
258 u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */
260 #ifdef CONFIG_MAC80211_MESH
262 * Mesh peer link attributes
263 * TODO: move to a sub-structure that is referenced with pointer?
265 __le16 llid; /* Local link ID */
266 __le16 plid; /* Peer link ID */
267 __le16 reason; /* Cancel reason on PLINK_HOLDING state */
268 u8 plink_retries; /* Retries in establishment */
269 bool ignore_plink_timer;
270 enum plink_state plink_state;
272 struct timer_list plink_timer;
273 spinlock_t plink_lock; /* For peer_state reads / updates and other
274 updates in the structure. Ensures robust
275 transitions for the peerlink FSM */
278 #ifdef CONFIG_MAC80211_DEBUGFS
279 struct sta_info_debugfsdentries {
281 struct dentry *flags;
282 struct dentry *num_ps_buf_frames;
283 struct dentry *inactive_ms;
284 struct dentry *last_seq_ctrl;
285 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
286 struct dentry *wme_rx_queue;
287 struct dentry *wme_tx_queue;
289 struct dentry *agg_status;
294 static inline enum plink_state sta_plink_state(struct sta_info *sta)
296 #ifdef CONFIG_MAC80211_MESH
297 return sta->plink_state;
303 /* Maximum number of concurrently registered stations */
304 #define MAX_STA_COUNT 2007
306 #define STA_HASH_SIZE 256
307 #define STA_HASH(sta) (sta[5])
310 /* Maximum number of frames to buffer per power saving station */
311 #define STA_MAX_TX_BUFFER 128
313 /* Minimum buffered frame expiry time. If STA uses listen interval that is
314 * smaller than this value, the minimum value here is used instead. */
315 #define STA_TX_BUFFER_EXPIRE (10 * HZ)
317 /* How often station data is cleaned up (e.g., expiration of buffered frames)
319 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
322 * Get a STA info, must have be under RCU read lock.
324 struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr);
326 * Get STA info by index, BROKEN!
328 struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx,
329 struct net_device *dev);
331 * Create a new STA info, caller owns returned structure
332 * until sta_info_insert().
334 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
335 u8 *addr, gfp_t gfp);
337 * Insert STA info into hash table/list, returns zero or a
338 * -EEXIST if (if the same MAC address is already present).
340 * Calling this without RCU protection makes the caller
341 * relinquish its reference to @sta.
343 int sta_info_insert(struct sta_info *sta);
345 * Unlink a STA info from the hash table/list.
346 * This can NULL the STA pointer if somebody else
347 * has already unlinked it.
349 void sta_info_unlink(struct sta_info **sta);
350 void __sta_info_unlink(struct sta_info **sta);
352 void sta_info_destroy(struct sta_info *sta);
353 void sta_info_set_tim_bit(struct sta_info *sta);
354 void sta_info_clear_tim_bit(struct sta_info *sta);
356 void sta_info_init(struct ieee80211_local *local);
357 int sta_info_start(struct ieee80211_local *local);
358 void sta_info_stop(struct ieee80211_local *local);
359 int sta_info_flush(struct ieee80211_local *local,
360 struct ieee80211_sub_if_data *sdata);
361 void sta_info_flush_delayed(struct ieee80211_sub_if_data *sdata);
363 #endif /* STA_INFO_H */