1 /* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * Copyright 2013-2014 Intel Mobile Communications GmbH 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 10 #ifndef STA_INFO_H 11 #define STA_INFO_H 12 13 #include <linux/list.h> 14 #include <linux/types.h> 15 #include <linux/if_ether.h> 16 #include <linux/workqueue.h> 17 #include <linux/average.h> 18 #include <linux/etherdevice.h> 19 #include <linux/rhashtable.h> 20 #include "key.h" 21 22 /** 23 * enum ieee80211_sta_info_flags - Stations flags 24 * 25 * These flags are used with &struct sta_info's @flags member, but 26 * only indirectly with set_sta_flag() and friends. 27 * 28 * @WLAN_STA_AUTH: Station is authenticated. 29 * @WLAN_STA_ASSOC: Station is associated. 30 * @WLAN_STA_PS_STA: Station is in power-save mode 31 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 32 * This bit is always checked so needs to be enabled for all stations 33 * when virtual port control is not in use. 34 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 35 * frames. 36 * @WLAN_STA_WDS: Station is one of our WDS peers. 37 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 38 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 39 * frame to this station is transmitted. 40 * @WLAN_STA_MFP: Management frame protection is used with this STA. 41 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 42 * during suspend/resume and station removal. 43 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 44 * power-save mode logically to flush frames that might still 45 * be in the queues 46 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 47 * station in power-save mode, reply when the driver unblocks. 48 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 49 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 50 * packets. This means the link is enabled. 51 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 52 * station. 53 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 54 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 55 * TDLS peer 56 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on 57 * the BSS base channel. 58 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 59 * keeping station in power-save mode, reply when the driver 60 * unblocks the station. 61 * @WLAN_STA_SP: Station is in a service period, so don't try to 62 * reply to other uAPSD trigger frames or PS-Poll. 63 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 64 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 65 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 66 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 67 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 68 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 69 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 70 * until pending frames are delivered 71 */ 72 enum ieee80211_sta_info_flags { 73 WLAN_STA_AUTH, 74 WLAN_STA_ASSOC, 75 WLAN_STA_PS_STA, 76 WLAN_STA_AUTHORIZED, 77 WLAN_STA_SHORT_PREAMBLE, 78 WLAN_STA_WDS, 79 WLAN_STA_CLEAR_PS_FILT, 80 WLAN_STA_MFP, 81 WLAN_STA_BLOCK_BA, 82 WLAN_STA_PS_DRIVER, 83 WLAN_STA_PSPOLL, 84 WLAN_STA_TDLS_PEER, 85 WLAN_STA_TDLS_PEER_AUTH, 86 WLAN_STA_TDLS_INITIATOR, 87 WLAN_STA_TDLS_CHAN_SWITCH, 88 WLAN_STA_TDLS_OFF_CHANNEL, 89 WLAN_STA_TDLS_WIDER_BW, 90 WLAN_STA_UAPSD, 91 WLAN_STA_SP, 92 WLAN_STA_4ADDR_EVENT, 93 WLAN_STA_INSERTED, 94 WLAN_STA_RATE_CONTROL, 95 WLAN_STA_TOFFSET_KNOWN, 96 WLAN_STA_MPSP_OWNER, 97 WLAN_STA_MPSP_RECIPIENT, 98 WLAN_STA_PS_DELIVER, 99 }; 100 101 #define ADDBA_RESP_INTERVAL HZ 102 #define HT_AGG_MAX_RETRIES 15 103 #define HT_AGG_BURST_RETRIES 3 104 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 105 106 #define HT_AGG_STATE_DRV_READY 0 107 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 108 #define HT_AGG_STATE_OPERATIONAL 2 109 #define HT_AGG_STATE_STOPPING 3 110 #define HT_AGG_STATE_WANT_START 4 111 #define HT_AGG_STATE_WANT_STOP 5 112 113 enum ieee80211_agg_stop_reason { 114 AGG_STOP_DECLINED, 115 AGG_STOP_LOCAL_REQUEST, 116 AGG_STOP_PEER_REQUEST, 117 AGG_STOP_DESTROY_STA, 118 }; 119 120 /** 121 * struct tid_ampdu_tx - TID aggregation information (Tx). 122 * 123 * @rcu_head: rcu head for freeing structure 124 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 125 * @addba_resp_timer: timer for peer's response to addba request 126 * @pending: pending frames queue -- use sta's spinlock to protect 127 * @dialog_token: dialog token for aggregation session 128 * @timeout: session timeout value to be filled in ADDBA requests 129 * @state: session state (see above) 130 * @last_tx: jiffies of last tx activity 131 * @stop_initiator: initiator of a session stop 132 * @tx_stop: TX DelBA frame when stopping 133 * @buf_size: reorder buffer size at receiver 134 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 135 * @bar_pending: BAR needs to be re-sent 136 * 137 * This structure's lifetime is managed by RCU, assignments to 138 * the array holding it must hold the aggregation mutex. 139 * 140 * The TX path can access it under RCU lock-free if, and 141 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 142 * set. Otherwise, the TX path must also acquire the spinlock 143 * and re-check the state, see comments in the tx code 144 * touching it. 145 */ 146 struct tid_ampdu_tx { 147 struct rcu_head rcu_head; 148 struct timer_list session_timer; 149 struct timer_list addba_resp_timer; 150 struct sk_buff_head pending; 151 unsigned long state; 152 unsigned long last_tx; 153 u16 timeout; 154 u8 dialog_token; 155 u8 stop_initiator; 156 bool tx_stop; 157 u8 buf_size; 158 159 u16 failed_bar_ssn; 160 bool bar_pending; 161 }; 162 163 /** 164 * struct tid_ampdu_rx - TID aggregation information (Rx). 165 * 166 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 167 * A-MSDU with individually reported subframes. 168 * @reorder_time: jiffies when skb was added 169 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 170 * @reorder_timer: releases expired frames from the reorder buffer. 171 * @last_rx: jiffies of last rx activity 172 * @head_seq_num: head sequence number in reordering buffer. 173 * @stored_mpdu_num: number of MPDUs in reordering buffer 174 * @ssn: Starting Sequence Number expected to be aggregated. 175 * @buf_size: buffer size for incoming A-MPDUs 176 * @timeout: reset timer value (in TUs). 177 * @dialog_token: dialog token for aggregation session 178 * @rcu_head: RCU head used for freeing this struct 179 * @reorder_lock: serializes access to reorder buffer, see below. 180 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 181 * and ssn. 182 * @removed: this session is removed (but might have been found due to RCU) 183 * 184 * This structure's lifetime is managed by RCU, assignments to 185 * the array holding it must hold the aggregation mutex. 186 * 187 * The @reorder_lock is used to protect the members of this 188 * struct, except for @timeout, @buf_size and @dialog_token, 189 * which are constant across the lifetime of the struct (the 190 * dialog token being used only for debugging). 191 */ 192 struct tid_ampdu_rx { 193 struct rcu_head rcu_head; 194 spinlock_t reorder_lock; 195 struct sk_buff_head *reorder_buf; 196 unsigned long *reorder_time; 197 struct timer_list session_timer; 198 struct timer_list reorder_timer; 199 unsigned long last_rx; 200 u16 head_seq_num; 201 u16 stored_mpdu_num; 202 u16 ssn; 203 u16 buf_size; 204 u16 timeout; 205 u8 dialog_token; 206 bool auto_seq; 207 bool removed; 208 }; 209 210 /** 211 * struct sta_ampdu_mlme - STA aggregation information. 212 * 213 * @tid_rx: aggregation info for Rx per TID -- RCU protected 214 * @tid_tx: aggregation info for Tx per TID 215 * @tid_start_tx: sessions where start was requested 216 * @addba_req_num: number of times addBA request has been sent. 217 * @last_addba_req_time: timestamp of the last addBA request. 218 * @dialog_token_allocator: dialog token enumerator for each new session; 219 * @work: work struct for starting/stopping aggregation 220 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 221 * RX timer expired until the work for it runs 222 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 223 * driver requested to close until the work for it runs 224 * @mtx: mutex to protect all TX data (except non-NULL assignments 225 * to tid_tx[idx], which are protected by the sta spinlock) 226 * tid_start_tx is also protected by sta->lock. 227 */ 228 struct sta_ampdu_mlme { 229 struct mutex mtx; 230 /* rx */ 231 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 232 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 233 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 234 /* tx */ 235 struct work_struct work; 236 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 237 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 238 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 239 u8 addba_req_num[IEEE80211_NUM_TIDS]; 240 u8 dialog_token_allocator; 241 }; 242 243 244 /* Value to indicate no TID reservation */ 245 #define IEEE80211_TID_UNRESERVED 0xff 246 247 #define IEEE80211_FAST_XMIT_MAX_IV 18 248 249 /** 250 * struct ieee80211_fast_tx - TX fastpath information 251 * @key: key to use for hw crypto 252 * @hdr: the 802.11 header to put with the frame 253 * @hdr_len: actual 802.11 header length 254 * @sa_offs: offset of the SA 255 * @da_offs: offset of the DA 256 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 257 * @band: band this will be transmitted on, for tx_info 258 * @rcu_head: RCU head to free this struct 259 * 260 * This struct is small enough so that the common case (maximum crypto 261 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 262 * cache line. 263 */ 264 struct ieee80211_fast_tx { 265 struct ieee80211_key *key; 266 u8 hdr_len; 267 u8 sa_offs, da_offs, pn_offs; 268 u8 band; 269 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 270 sizeof(rfc1042_header)]; 271 272 struct rcu_head rcu_head; 273 }; 274 275 /** 276 * struct mesh_sta - mesh STA information 277 * @plink_lock: serialize access to plink fields 278 * @llid: Local link ID 279 * @plid: Peer link ID 280 * @aid: local aid supplied by peer 281 * @reason: Cancel reason on PLINK_HOLDING state 282 * @plink_retries: Retries in establishment 283 * @plink_state: peer link state 284 * @plink_timeout: timeout of peer link 285 * @plink_timer: peer link watch timer 286 * @t_offset: timing offset relative to this host 287 * @t_offset_setpoint: reference timing offset of this sta to be used when 288 * calculating clockdrift 289 * @local_pm: local link-specific power save mode 290 * @peer_pm: peer-specific power save mode towards local STA 291 * @nonpeer_pm: STA power save mode towards non-peer neighbors 292 * @processed_beacon: set to true after peer rates and capabilities are 293 * processed 294 * @fail_avg: moving percentage of failed MSDUs 295 */ 296 struct mesh_sta { 297 struct timer_list plink_timer; 298 299 s64 t_offset; 300 s64 t_offset_setpoint; 301 302 spinlock_t plink_lock; 303 u16 llid; 304 u16 plid; 305 u16 aid; 306 u16 reason; 307 u8 plink_retries; 308 309 bool processed_beacon; 310 311 enum nl80211_plink_state plink_state; 312 u32 plink_timeout; 313 314 /* mesh power save */ 315 enum nl80211_mesh_power_mode local_pm; 316 enum nl80211_mesh_power_mode peer_pm; 317 enum nl80211_mesh_power_mode nonpeer_pm; 318 319 /* moving percentage of failed MSDUs */ 320 unsigned int fail_avg; 321 }; 322 323 DECLARE_EWMA(signal, 1024, 8) 324 325 /** 326 * struct sta_info - STA information 327 * 328 * This structure collects information about a station that 329 * mac80211 is communicating with. 330 * 331 * @list: global linked list entry 332 * @free_list: list entry for keeping track of stations to free 333 * @hash_node: hash node for rhashtable 334 * @addr: station's MAC address - duplicated from public part to 335 * let the hash table work with just a single cacheline 336 * @local: pointer to the global information 337 * @sdata: virtual interface this station belongs to 338 * @ptk: peer keys negotiated with this station, if any 339 * @ptk_idx: last installed peer key index 340 * @gtk: group keys negotiated with this station, if any 341 * @rate_ctrl: rate control algorithm reference 342 * @rate_ctrl_lock: spinlock used to protect rate control data 343 * (data inside the algorithm, so serializes calls there) 344 * @rate_ctrl_priv: rate control private per-STA pointer 345 * @last_tx_rate: rate used for last transmit, to report to userspace as 346 * "the" transmit rate 347 * @last_rx_rate_idx: rx status rate index of the last data packet 348 * @last_rx_rate_flag: rx status flag of the last data packet 349 * @last_rx_rate_vht_flag: rx status vht flag of the last data packet 350 * @last_rx_rate_vht_nss: rx status nss of last data packet 351 * @lock: used for locking all fields that require locking, see comments 352 * in the header file. 353 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 354 * @listen_interval: listen interval of this station, when we're acting as AP 355 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 356 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 357 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 358 * when it leaves power saving state or polls 359 * @tx_filtered: buffers (per AC) of frames we already tried to 360 * transmit but were filtered by hardware due to STA having 361 * entered power saving state, these are also delivered to 362 * the station when it leaves powersave or polls for frames 363 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 364 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 365 * @rx_packets: Number of MSDUs received from this STA 366 * @rx_bytes: Number of bytes received from this STA 367 * @last_rx: time (in jiffies) when last frame was received from this STA 368 * @last_connected: time (in seconds) when a station got connected 369 * @num_duplicates: number of duplicate frames received from this STA 370 * @rx_fragments: number of received MPDUs 371 * @rx_dropped: number of dropped MPDUs from this STA 372 * @last_signal: signal of last received frame from this STA 373 * @avg_signal: moving average of signal of received frames from this STA 374 * @last_ack_signal: signal of last received Ack frame from this STA 375 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 376 * plus one for non-QoS frames) 377 * @tx_filtered_count: number of frames the hardware filtered for this STA 378 * @tx_retry_failed: number of frames that failed retry 379 * @tx_retry_count: total number of retries for frames to this STA 380 * @tx_packets: number of RX/TX MSDUs 381 * @tx_bytes: number of bytes transmitted to this STA 382 * @tid_seq: per-TID sequence numbers for sending to this STA 383 * @ampdu_mlme: A-MPDU state machine state 384 * @timer_to_tid: identity mapping to ID timers 385 * @mesh: mesh STA information 386 * @debugfs: debug filesystem info 387 * @dead: set to true when sta is unlinked 388 * @uploaded: set to true when sta is uploaded to the driver 389 * @lost_packets: number of consecutive lost packets 390 * @sta: station information we share with the driver 391 * @sta_state: duplicates information about station state (for debug) 392 * @beacon_loss_count: number of times beacon loss has triggered 393 * @rcu_head: RCU head used for freeing this station struct 394 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 395 * taken from HT/VHT capabilities or VHT operating mode notification 396 * @chains: chains ever used for RX from this station 397 * @chain_signal_last: last signal (per chain) 398 * @chain_signal_avg: signal average (per chain) 399 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 400 * AP only. 401 * @cipher_scheme: optional cipher scheme for this station 402 * @last_tdls_pkt_time: holds the time in jiffies of last TDLS pkt ACKed 403 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 404 * @tx_msdu: MSDUs transmitted to this station, using IEEE80211_NUM_TID 405 * entry for non-QoS frames 406 * @tx_msdu_retries: MSDU retries for transmissions to to this station, 407 * using IEEE80211_NUM_TID entry for non-QoS frames 408 * @tx_msdu_failed: MSDU failures for transmissions to to this station, 409 * using IEEE80211_NUM_TID entry for non-QoS frames 410 * @rx_msdu: MSDUs received from this station, using IEEE80211_NUM_TID 411 * entry for non-QoS frames 412 * @fast_tx: TX fastpath information 413 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 414 * the BSS one. 415 */ 416 struct sta_info { 417 /* General information, mostly static */ 418 struct list_head list, free_list; 419 struct rcu_head rcu_head; 420 struct rhash_head hash_node; 421 u8 addr[ETH_ALEN]; 422 struct ieee80211_local *local; 423 struct ieee80211_sub_if_data *sdata; 424 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 425 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 426 u8 ptk_idx; 427 struct rate_control_ref *rate_ctrl; 428 void *rate_ctrl_priv; 429 spinlock_t rate_ctrl_lock; 430 spinlock_t lock; 431 432 struct ieee80211_fast_tx __rcu *fast_tx; 433 434 #ifdef CONFIG_MAC80211_MESH 435 struct mesh_sta *mesh; 436 #endif 437 438 struct work_struct drv_deliver_wk; 439 440 u16 listen_interval; 441 442 bool dead; 443 444 bool uploaded; 445 446 enum ieee80211_sta_state sta_state; 447 448 /* use the accessors defined below */ 449 unsigned long _flags; 450 451 /* STA powersave lock and frame queues */ 452 spinlock_t ps_lock; 453 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 454 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 455 unsigned long driver_buffered_tids; 456 unsigned long txq_buffered_tids; 457 458 /* Updated from RX path only, no locking requirements */ 459 unsigned long rx_packets; 460 u64 rx_bytes; 461 unsigned long last_rx; 462 long last_connected; 463 unsigned long num_duplicates; 464 unsigned long rx_fragments; 465 unsigned long rx_dropped; 466 int last_signal; 467 struct ewma_signal avg_signal; 468 int last_ack_signal; 469 470 u8 chains; 471 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 472 struct ewma_signal chain_signal_avg[IEEE80211_MAX_CHAINS]; 473 474 /* Plus 1 for non-QoS frames */ 475 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 476 477 /* Updated from TX status path only, no locking requirements */ 478 unsigned long tx_filtered_count; 479 unsigned long tx_retry_failed, tx_retry_count; 480 481 /* Updated from TX path only, no locking requirements */ 482 u64 tx_packets[IEEE80211_NUM_ACS]; 483 u64 tx_bytes[IEEE80211_NUM_ACS]; 484 struct ieee80211_tx_rate last_tx_rate; 485 int last_rx_rate_idx; 486 u32 last_rx_rate_flag; 487 u32 last_rx_rate_vht_flag; 488 u8 last_rx_rate_vht_nss; 489 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 490 u64 tx_msdu[IEEE80211_NUM_TIDS + 1]; 491 u64 tx_msdu_retries[IEEE80211_NUM_TIDS + 1]; 492 u64 tx_msdu_failed[IEEE80211_NUM_TIDS + 1]; 493 u64 rx_msdu[IEEE80211_NUM_TIDS + 1]; 494 495 /* 496 * Aggregation information, locked with lock. 497 */ 498 struct sta_ampdu_mlme ampdu_mlme; 499 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 500 501 #ifdef CONFIG_MAC80211_DEBUGFS 502 struct sta_info_debugfsdentries { 503 struct dentry *dir; 504 bool add_has_run; 505 } debugfs; 506 #endif 507 508 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 509 510 unsigned int lost_packets; 511 unsigned int beacon_loss_count; 512 513 enum ieee80211_smps_mode known_smps_mode; 514 const struct ieee80211_cipher_scheme *cipher_scheme; 515 516 /* TDLS timeout data */ 517 unsigned long last_tdls_pkt_time; 518 519 u8 reserved_tid; 520 521 struct cfg80211_chan_def tdls_chandef; 522 523 /* keep last! */ 524 struct ieee80211_sta sta; 525 }; 526 527 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 528 { 529 #ifdef CONFIG_MAC80211_MESH 530 return sta->mesh->plink_state; 531 #endif 532 return NL80211_PLINK_LISTEN; 533 } 534 535 static inline void set_sta_flag(struct sta_info *sta, 536 enum ieee80211_sta_info_flags flag) 537 { 538 WARN_ON(flag == WLAN_STA_AUTH || 539 flag == WLAN_STA_ASSOC || 540 flag == WLAN_STA_AUTHORIZED); 541 set_bit(flag, &sta->_flags); 542 } 543 544 static inline void clear_sta_flag(struct sta_info *sta, 545 enum ieee80211_sta_info_flags flag) 546 { 547 WARN_ON(flag == WLAN_STA_AUTH || 548 flag == WLAN_STA_ASSOC || 549 flag == WLAN_STA_AUTHORIZED); 550 clear_bit(flag, &sta->_flags); 551 } 552 553 static inline int test_sta_flag(struct sta_info *sta, 554 enum ieee80211_sta_info_flags flag) 555 { 556 return test_bit(flag, &sta->_flags); 557 } 558 559 static inline int test_and_clear_sta_flag(struct sta_info *sta, 560 enum ieee80211_sta_info_flags flag) 561 { 562 WARN_ON(flag == WLAN_STA_AUTH || 563 flag == WLAN_STA_ASSOC || 564 flag == WLAN_STA_AUTHORIZED); 565 return test_and_clear_bit(flag, &sta->_flags); 566 } 567 568 static inline int test_and_set_sta_flag(struct sta_info *sta, 569 enum ieee80211_sta_info_flags flag) 570 { 571 WARN_ON(flag == WLAN_STA_AUTH || 572 flag == WLAN_STA_ASSOC || 573 flag == WLAN_STA_AUTHORIZED); 574 return test_and_set_bit(flag, &sta->_flags); 575 } 576 577 int sta_info_move_state(struct sta_info *sta, 578 enum ieee80211_sta_state new_state); 579 580 static inline void sta_info_pre_move_state(struct sta_info *sta, 581 enum ieee80211_sta_state new_state) 582 { 583 int ret; 584 585 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 586 587 ret = sta_info_move_state(sta, new_state); 588 WARN_ON_ONCE(ret); 589 } 590 591 592 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 593 struct tid_ampdu_tx *tid_tx); 594 595 static inline struct tid_ampdu_tx * 596 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 597 { 598 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 599 lockdep_is_held(&sta->lock) || 600 lockdep_is_held(&sta->ampdu_mlme.mtx)); 601 } 602 603 /* Maximum number of frames to buffer per power saving station per AC */ 604 #define STA_MAX_TX_BUFFER 64 605 606 /* Minimum buffered frame expiry time. If STA uses listen interval that is 607 * smaller than this value, the minimum value here is used instead. */ 608 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 609 610 /* How often station data is cleaned up (e.g., expiration of buffered frames) 611 */ 612 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 613 614 /* 615 * Get a STA info, must be under RCU read lock. 616 */ 617 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 618 const u8 *addr); 619 620 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 621 const u8 *addr); 622 623 u32 sta_addr_hash(const void *key, u32 length, u32 seed); 624 625 #define _sta_bucket_idx(_tbl, _a) \ 626 rht_bucket_index(_tbl, sta_addr_hash(_a, ETH_ALEN, (_tbl)->hash_rnd)) 627 628 #define for_each_sta_info(local, tbl, _addr, _sta, _tmp) \ 629 rht_for_each_entry_rcu(_sta, _tmp, tbl, \ 630 _sta_bucket_idx(tbl, _addr), \ 631 hash_node) \ 632 /* compare address and run code only if it matches */ \ 633 if (ether_addr_equal(_sta->addr, (_addr))) 634 635 /* 636 * Get STA info by index, BROKEN! 637 */ 638 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 639 int idx); 640 /* 641 * Create a new STA info, caller owns returned structure 642 * until sta_info_insert(). 643 */ 644 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 645 const u8 *addr, gfp_t gfp); 646 647 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 648 649 /* 650 * Insert STA info into hash table/list, returns zero or a 651 * -EEXIST if (if the same MAC address is already present). 652 * 653 * Calling the non-rcu version makes the caller relinquish, 654 * the _rcu version calls read_lock_rcu() and must be called 655 * without it held. 656 */ 657 int sta_info_insert(struct sta_info *sta); 658 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 659 660 int __must_check __sta_info_destroy(struct sta_info *sta); 661 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 662 const u8 *addr); 663 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 664 const u8 *addr); 665 666 void sta_info_recalc_tim(struct sta_info *sta); 667 668 int sta_info_init(struct ieee80211_local *local); 669 void sta_info_stop(struct ieee80211_local *local); 670 671 /** 672 * sta_info_flush - flush matching STA entries from the STA table 673 * 674 * Returns the number of removed STA entries. 675 * 676 * @sdata: sdata to remove all stations from 677 * @vlans: if the given interface is an AP interface, also flush VLANs 678 */ 679 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 680 681 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 682 { 683 return __sta_info_flush(sdata, false); 684 } 685 686 void sta_set_rate_info_tx(struct sta_info *sta, 687 const struct ieee80211_tx_rate *rate, 688 struct rate_info *rinfo); 689 void sta_set_rate_info_rx(struct sta_info *sta, 690 struct rate_info *rinfo); 691 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 692 693 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 694 unsigned long exp_time); 695 u8 sta_info_tx_streams(struct sta_info *sta); 696 697 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 698 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 699 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 700 701 #endif /* STA_INFO_H */ 702