1 /* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * Copyright 2013-2014 Intel Mobile Communications GmbH 4 * Copyright(c) 2015 Intel Deutschland GmbH 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifndef STA_INFO_H 12 #define STA_INFO_H 13 14 #include <linux/list.h> 15 #include <linux/types.h> 16 #include <linux/if_ether.h> 17 #include <linux/workqueue.h> 18 #include <linux/average.h> 19 #include <linux/etherdevice.h> 20 #include <linux/rhashtable.h> 21 #include "key.h" 22 23 /** 24 * enum ieee80211_sta_info_flags - Stations flags 25 * 26 * These flags are used with &struct sta_info's @flags member, but 27 * only indirectly with set_sta_flag() and friends. 28 * 29 * @WLAN_STA_AUTH: Station is authenticated. 30 * @WLAN_STA_ASSOC: Station is associated. 31 * @WLAN_STA_PS_STA: Station is in power-save mode 32 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 33 * This bit is always checked so needs to be enabled for all stations 34 * when virtual port control is not in use. 35 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 36 * frames. 37 * @WLAN_STA_WDS: Station is one of our WDS peers. 38 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 39 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 40 * frame to this station is transmitted. 41 * @WLAN_STA_MFP: Management frame protection is used with this STA. 42 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 43 * during suspend/resume and station removal. 44 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 45 * power-save mode logically to flush frames that might still 46 * be in the queues 47 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 48 * station in power-save mode, reply when the driver unblocks. 49 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 50 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 51 * packets. This means the link is enabled. 52 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 53 * station. 54 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 55 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 56 * TDLS peer 57 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on 58 * the BSS base channel. 59 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 60 * keeping station in power-save mode, reply when the driver 61 * unblocks the station. 62 * @WLAN_STA_SP: Station is in a service period, so don't try to 63 * reply to other uAPSD trigger frames or PS-Poll. 64 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 65 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 66 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 67 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 68 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 69 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 70 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 71 * until pending frames are delivered 72 */ 73 enum ieee80211_sta_info_flags { 74 WLAN_STA_AUTH, 75 WLAN_STA_ASSOC, 76 WLAN_STA_PS_STA, 77 WLAN_STA_AUTHORIZED, 78 WLAN_STA_SHORT_PREAMBLE, 79 WLAN_STA_WDS, 80 WLAN_STA_CLEAR_PS_FILT, 81 WLAN_STA_MFP, 82 WLAN_STA_BLOCK_BA, 83 WLAN_STA_PS_DRIVER, 84 WLAN_STA_PSPOLL, 85 WLAN_STA_TDLS_PEER, 86 WLAN_STA_TDLS_PEER_AUTH, 87 WLAN_STA_TDLS_INITIATOR, 88 WLAN_STA_TDLS_CHAN_SWITCH, 89 WLAN_STA_TDLS_OFF_CHANNEL, 90 WLAN_STA_TDLS_WIDER_BW, 91 WLAN_STA_UAPSD, 92 WLAN_STA_SP, 93 WLAN_STA_4ADDR_EVENT, 94 WLAN_STA_INSERTED, 95 WLAN_STA_RATE_CONTROL, 96 WLAN_STA_TOFFSET_KNOWN, 97 WLAN_STA_MPSP_OWNER, 98 WLAN_STA_MPSP_RECIPIENT, 99 WLAN_STA_PS_DELIVER, 100 }; 101 102 #define ADDBA_RESP_INTERVAL HZ 103 #define HT_AGG_MAX_RETRIES 15 104 #define HT_AGG_BURST_RETRIES 3 105 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 106 107 #define HT_AGG_STATE_DRV_READY 0 108 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 109 #define HT_AGG_STATE_OPERATIONAL 2 110 #define HT_AGG_STATE_STOPPING 3 111 #define HT_AGG_STATE_WANT_START 4 112 #define HT_AGG_STATE_WANT_STOP 5 113 114 enum ieee80211_agg_stop_reason { 115 AGG_STOP_DECLINED, 116 AGG_STOP_LOCAL_REQUEST, 117 AGG_STOP_PEER_REQUEST, 118 AGG_STOP_DESTROY_STA, 119 }; 120 121 /** 122 * struct tid_ampdu_tx - TID aggregation information (Tx). 123 * 124 * @rcu_head: rcu head for freeing structure 125 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 126 * @addba_resp_timer: timer for peer's response to addba request 127 * @pending: pending frames queue -- use sta's spinlock to protect 128 * @dialog_token: dialog token for aggregation session 129 * @timeout: session timeout value to be filled in ADDBA requests 130 * @state: session state (see above) 131 * @last_tx: jiffies of last tx activity 132 * @stop_initiator: initiator of a session stop 133 * @tx_stop: TX DelBA frame when stopping 134 * @buf_size: reorder buffer size at receiver 135 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 136 * @bar_pending: BAR needs to be re-sent 137 * @amsdu: support A-MSDU withing A-MDPU 138 * 139 * This structure's lifetime is managed by RCU, assignments to 140 * the array holding it must hold the aggregation mutex. 141 * 142 * The TX path can access it under RCU lock-free if, and 143 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 144 * set. Otherwise, the TX path must also acquire the spinlock 145 * and re-check the state, see comments in the tx code 146 * touching it. 147 */ 148 struct tid_ampdu_tx { 149 struct rcu_head rcu_head; 150 struct timer_list session_timer; 151 struct timer_list addba_resp_timer; 152 struct sk_buff_head pending; 153 unsigned long state; 154 unsigned long last_tx; 155 u16 timeout; 156 u8 dialog_token; 157 u8 stop_initiator; 158 bool tx_stop; 159 u8 buf_size; 160 161 u16 failed_bar_ssn; 162 bool bar_pending; 163 bool amsdu; 164 }; 165 166 /** 167 * struct tid_ampdu_rx - TID aggregation information (Rx). 168 * 169 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 170 * A-MSDU with individually reported subframes. 171 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 172 * the reorder buffer that should be ignored when releasing frames 173 * @reorder_time: jiffies when skb was added 174 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 175 * @reorder_timer: releases expired frames from the reorder buffer. 176 * @last_rx: jiffies of last rx activity 177 * @head_seq_num: head sequence number in reordering buffer. 178 * @stored_mpdu_num: number of MPDUs in reordering buffer 179 * @ssn: Starting Sequence Number expected to be aggregated. 180 * @buf_size: buffer size for incoming A-MPDUs 181 * @timeout: reset timer value (in TUs). 182 * @dialog_token: dialog token for aggregation session 183 * @rcu_head: RCU head used for freeing this struct 184 * @reorder_lock: serializes access to reorder buffer, see below. 185 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 186 * and ssn. 187 * @removed: this session is removed (but might have been found due to RCU) 188 * 189 * This structure's lifetime is managed by RCU, assignments to 190 * the array holding it must hold the aggregation mutex. 191 * 192 * The @reorder_lock is used to protect the members of this 193 * struct, except for @timeout, @buf_size and @dialog_token, 194 * which are constant across the lifetime of the struct (the 195 * dialog token being used only for debugging). 196 */ 197 struct tid_ampdu_rx { 198 struct rcu_head rcu_head; 199 spinlock_t reorder_lock; 200 u64 reorder_buf_filtered; 201 struct sk_buff_head *reorder_buf; 202 unsigned long *reorder_time; 203 struct timer_list session_timer; 204 struct timer_list reorder_timer; 205 unsigned long last_rx; 206 u16 head_seq_num; 207 u16 stored_mpdu_num; 208 u16 ssn; 209 u16 buf_size; 210 u16 timeout; 211 u8 dialog_token; 212 bool auto_seq; 213 bool removed; 214 }; 215 216 /** 217 * struct sta_ampdu_mlme - STA aggregation information. 218 * 219 * @mtx: mutex to protect all TX data (except non-NULL assignments 220 * to tid_tx[idx], which are protected by the sta spinlock) 221 * tid_start_tx is also protected by sta->lock. 222 * @tid_rx: aggregation info for Rx per TID -- RCU protected 223 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 224 * RX timer expired until the work for it runs 225 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 226 * driver requested to close until the work for it runs 227 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 228 * @work: work struct for starting/stopping aggregation 229 * @tid_tx: aggregation info for Tx per TID 230 * @tid_start_tx: sessions where start was requested 231 * @last_addba_req_time: timestamp of the last addBA request. 232 * @addba_req_num: number of times addBA request has been sent. 233 * @dialog_token_allocator: dialog token enumerator for each new session; 234 */ 235 struct sta_ampdu_mlme { 236 struct mutex mtx; 237 /* rx */ 238 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 239 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 240 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 241 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 242 /* tx */ 243 struct work_struct work; 244 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 245 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 246 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 247 u8 addba_req_num[IEEE80211_NUM_TIDS]; 248 u8 dialog_token_allocator; 249 }; 250 251 252 /* Value to indicate no TID reservation */ 253 #define IEEE80211_TID_UNRESERVED 0xff 254 255 #define IEEE80211_FAST_XMIT_MAX_IV 18 256 257 /** 258 * struct ieee80211_fast_tx - TX fastpath information 259 * @key: key to use for hw crypto 260 * @hdr: the 802.11 header to put with the frame 261 * @hdr_len: actual 802.11 header length 262 * @sa_offs: offset of the SA 263 * @da_offs: offset of the DA 264 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 265 * @band: band this will be transmitted on, for tx_info 266 * @rcu_head: RCU head to free this struct 267 * 268 * This struct is small enough so that the common case (maximum crypto 269 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 270 * cache line. 271 */ 272 struct ieee80211_fast_tx { 273 struct ieee80211_key *key; 274 u8 hdr_len; 275 u8 sa_offs, da_offs, pn_offs; 276 u8 band; 277 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 278 sizeof(rfc1042_header)]; 279 280 struct rcu_head rcu_head; 281 }; 282 283 /** 284 * struct mesh_sta - mesh STA information 285 * @plink_lock: serialize access to plink fields 286 * @llid: Local link ID 287 * @plid: Peer link ID 288 * @aid: local aid supplied by peer 289 * @reason: Cancel reason on PLINK_HOLDING state 290 * @plink_retries: Retries in establishment 291 * @plink_state: peer link state 292 * @plink_timeout: timeout of peer link 293 * @plink_timer: peer link watch timer 294 * @t_offset: timing offset relative to this host 295 * @t_offset_setpoint: reference timing offset of this sta to be used when 296 * calculating clockdrift 297 * @local_pm: local link-specific power save mode 298 * @peer_pm: peer-specific power save mode towards local STA 299 * @nonpeer_pm: STA power save mode towards non-peer neighbors 300 * @processed_beacon: set to true after peer rates and capabilities are 301 * processed 302 * @fail_avg: moving percentage of failed MSDUs 303 */ 304 struct mesh_sta { 305 struct timer_list plink_timer; 306 307 s64 t_offset; 308 s64 t_offset_setpoint; 309 310 spinlock_t plink_lock; 311 u16 llid; 312 u16 plid; 313 u16 aid; 314 u16 reason; 315 u8 plink_retries; 316 317 bool processed_beacon; 318 319 enum nl80211_plink_state plink_state; 320 u32 plink_timeout; 321 322 /* mesh power save */ 323 enum nl80211_mesh_power_mode local_pm; 324 enum nl80211_mesh_power_mode peer_pm; 325 enum nl80211_mesh_power_mode nonpeer_pm; 326 327 /* moving percentage of failed MSDUs */ 328 unsigned int fail_avg; 329 }; 330 331 DECLARE_EWMA(signal, 1024, 8) 332 333 /** 334 * struct sta_info - STA information 335 * 336 * This structure collects information about a station that 337 * mac80211 is communicating with. 338 * 339 * @list: global linked list entry 340 * @free_list: list entry for keeping track of stations to free 341 * @hash_node: hash node for rhashtable 342 * @addr: station's MAC address - duplicated from public part to 343 * let the hash table work with just a single cacheline 344 * @local: pointer to the global information 345 * @sdata: virtual interface this station belongs to 346 * @ptk: peer keys negotiated with this station, if any 347 * @ptk_idx: last installed peer key index 348 * @gtk: group keys negotiated with this station, if any 349 * @rate_ctrl: rate control algorithm reference 350 * @rate_ctrl_lock: spinlock used to protect rate control data 351 * (data inside the algorithm, so serializes calls there) 352 * @rate_ctrl_priv: rate control private per-STA pointer 353 * @lock: used for locking all fields that require locking, see comments 354 * in the header file. 355 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 356 * @listen_interval: listen interval of this station, when we're acting as AP 357 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 358 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 359 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 360 * when it leaves power saving state or polls 361 * @tx_filtered: buffers (per AC) of frames we already tried to 362 * transmit but were filtered by hardware due to STA having 363 * entered power saving state, these are also delivered to 364 * the station when it leaves powersave or polls for frames 365 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 366 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 367 * @last_connected: time (in seconds) when a station got connected 368 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 369 * plus one for non-QoS frames) 370 * @tid_seq: per-TID sequence numbers for sending to this STA 371 * @ampdu_mlme: A-MPDU state machine state 372 * @timer_to_tid: identity mapping to ID timers 373 * @mesh: mesh STA information 374 * @debugfs: debug filesystem info 375 * @dead: set to true when sta is unlinked 376 * @removed: set to true when sta is being removed from sta_list 377 * @uploaded: set to true when sta is uploaded to the driver 378 * @sta: station information we share with the driver 379 * @sta_state: duplicates information about station state (for debug) 380 * @rcu_head: RCU head used for freeing this station struct 381 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 382 * taken from HT/VHT capabilities or VHT operating mode notification 383 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 384 * AP only. 385 * @cipher_scheme: optional cipher scheme for this station 386 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 387 * @fast_tx: TX fastpath information 388 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 389 * the BSS one. 390 * @tx_stats: TX statistics 391 * @rx_stats: RX statistics 392 * @status_stats: TX status statistics 393 */ 394 struct sta_info { 395 /* General information, mostly static */ 396 struct list_head list, free_list; 397 struct rcu_head rcu_head; 398 struct rhash_head hash_node; 399 u8 addr[ETH_ALEN]; 400 struct ieee80211_local *local; 401 struct ieee80211_sub_if_data *sdata; 402 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 403 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 404 u8 ptk_idx; 405 struct rate_control_ref *rate_ctrl; 406 void *rate_ctrl_priv; 407 spinlock_t rate_ctrl_lock; 408 spinlock_t lock; 409 410 struct ieee80211_fast_tx __rcu *fast_tx; 411 412 #ifdef CONFIG_MAC80211_MESH 413 struct mesh_sta *mesh; 414 #endif 415 416 struct work_struct drv_deliver_wk; 417 418 u16 listen_interval; 419 420 bool dead; 421 bool removed; 422 423 bool uploaded; 424 425 enum ieee80211_sta_state sta_state; 426 427 /* use the accessors defined below */ 428 unsigned long _flags; 429 430 /* STA powersave lock and frame queues */ 431 spinlock_t ps_lock; 432 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 433 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 434 unsigned long driver_buffered_tids; 435 unsigned long txq_buffered_tids; 436 437 long last_connected; 438 439 /* Updated from RX path only, no locking requirements */ 440 struct { 441 unsigned long packets; 442 u64 bytes; 443 unsigned long last_rx; 444 unsigned long num_duplicates; 445 unsigned long fragments; 446 unsigned long dropped; 447 int last_signal; 448 struct ewma_signal avg_signal; 449 u8 chains; 450 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 451 struct ewma_signal chain_signal_avg[IEEE80211_MAX_CHAINS]; 452 int last_rate_idx; 453 u32 last_rate_flag; 454 u32 last_rate_vht_flag; 455 u8 last_rate_vht_nss; 456 u64 msdu[IEEE80211_NUM_TIDS + 1]; 457 } rx_stats; 458 459 /* Plus 1 for non-QoS frames */ 460 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 461 462 /* Updated from TX status path only, no locking requirements */ 463 struct { 464 unsigned long filtered; 465 unsigned long retry_failed, retry_count; 466 unsigned int lost_packets; 467 unsigned long last_tdls_pkt_time; 468 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 469 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 470 } status_stats; 471 472 /* Updated from TX path only, no locking requirements */ 473 struct { 474 u64 packets[IEEE80211_NUM_ACS]; 475 u64 bytes[IEEE80211_NUM_ACS]; 476 struct ieee80211_tx_rate last_rate; 477 u64 msdu[IEEE80211_NUM_TIDS + 1]; 478 } tx_stats; 479 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 480 481 /* 482 * Aggregation information, locked with lock. 483 */ 484 struct sta_ampdu_mlme ampdu_mlme; 485 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 486 487 #ifdef CONFIG_MAC80211_DEBUGFS 488 struct sta_info_debugfsdentries { 489 struct dentry *dir; 490 bool add_has_run; 491 } debugfs; 492 #endif 493 494 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 495 496 enum ieee80211_smps_mode known_smps_mode; 497 const struct ieee80211_cipher_scheme *cipher_scheme; 498 499 u8 reserved_tid; 500 501 struct cfg80211_chan_def tdls_chandef; 502 503 /* keep last! */ 504 struct ieee80211_sta sta; 505 }; 506 507 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 508 { 509 #ifdef CONFIG_MAC80211_MESH 510 return sta->mesh->plink_state; 511 #endif 512 return NL80211_PLINK_LISTEN; 513 } 514 515 static inline void set_sta_flag(struct sta_info *sta, 516 enum ieee80211_sta_info_flags flag) 517 { 518 WARN_ON(flag == WLAN_STA_AUTH || 519 flag == WLAN_STA_ASSOC || 520 flag == WLAN_STA_AUTHORIZED); 521 set_bit(flag, &sta->_flags); 522 } 523 524 static inline void clear_sta_flag(struct sta_info *sta, 525 enum ieee80211_sta_info_flags flag) 526 { 527 WARN_ON(flag == WLAN_STA_AUTH || 528 flag == WLAN_STA_ASSOC || 529 flag == WLAN_STA_AUTHORIZED); 530 clear_bit(flag, &sta->_flags); 531 } 532 533 static inline int test_sta_flag(struct sta_info *sta, 534 enum ieee80211_sta_info_flags flag) 535 { 536 return test_bit(flag, &sta->_flags); 537 } 538 539 static inline int test_and_clear_sta_flag(struct sta_info *sta, 540 enum ieee80211_sta_info_flags flag) 541 { 542 WARN_ON(flag == WLAN_STA_AUTH || 543 flag == WLAN_STA_ASSOC || 544 flag == WLAN_STA_AUTHORIZED); 545 return test_and_clear_bit(flag, &sta->_flags); 546 } 547 548 static inline int test_and_set_sta_flag(struct sta_info *sta, 549 enum ieee80211_sta_info_flags flag) 550 { 551 WARN_ON(flag == WLAN_STA_AUTH || 552 flag == WLAN_STA_ASSOC || 553 flag == WLAN_STA_AUTHORIZED); 554 return test_and_set_bit(flag, &sta->_flags); 555 } 556 557 int sta_info_move_state(struct sta_info *sta, 558 enum ieee80211_sta_state new_state); 559 560 static inline void sta_info_pre_move_state(struct sta_info *sta, 561 enum ieee80211_sta_state new_state) 562 { 563 int ret; 564 565 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 566 567 ret = sta_info_move_state(sta, new_state); 568 WARN_ON_ONCE(ret); 569 } 570 571 572 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 573 struct tid_ampdu_tx *tid_tx); 574 575 static inline struct tid_ampdu_tx * 576 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 577 { 578 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 579 lockdep_is_held(&sta->lock) || 580 lockdep_is_held(&sta->ampdu_mlme.mtx)); 581 } 582 583 /* Maximum number of frames to buffer per power saving station per AC */ 584 #define STA_MAX_TX_BUFFER 64 585 586 /* Minimum buffered frame expiry time. If STA uses listen interval that is 587 * smaller than this value, the minimum value here is used instead. */ 588 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 589 590 /* How often station data is cleaned up (e.g., expiration of buffered frames) 591 */ 592 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 593 594 /* 595 * Get a STA info, must be under RCU read lock. 596 */ 597 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 598 const u8 *addr); 599 600 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 601 const u8 *addr); 602 603 u32 sta_addr_hash(const void *key, u32 length, u32 seed); 604 605 #define _sta_bucket_idx(_tbl, _a) \ 606 rht_bucket_index(_tbl, sta_addr_hash(_a, ETH_ALEN, (_tbl)->hash_rnd)) 607 608 #define for_each_sta_info(local, tbl, _addr, _sta, _tmp) \ 609 rht_for_each_entry_rcu(_sta, _tmp, tbl, \ 610 _sta_bucket_idx(tbl, _addr), \ 611 hash_node) \ 612 /* compare address and run code only if it matches */ \ 613 if (ether_addr_equal(_sta->addr, (_addr))) 614 615 /* 616 * Get STA info by index, BROKEN! 617 */ 618 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 619 int idx); 620 /* 621 * Create a new STA info, caller owns returned structure 622 * until sta_info_insert(). 623 */ 624 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 625 const u8 *addr, gfp_t gfp); 626 627 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 628 629 /* 630 * Insert STA info into hash table/list, returns zero or a 631 * -EEXIST if (if the same MAC address is already present). 632 * 633 * Calling the non-rcu version makes the caller relinquish, 634 * the _rcu version calls read_lock_rcu() and must be called 635 * without it held. 636 */ 637 int sta_info_insert(struct sta_info *sta); 638 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 639 640 int __must_check __sta_info_destroy(struct sta_info *sta); 641 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 642 const u8 *addr); 643 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 644 const u8 *addr); 645 646 void sta_info_recalc_tim(struct sta_info *sta); 647 648 int sta_info_init(struct ieee80211_local *local); 649 void sta_info_stop(struct ieee80211_local *local); 650 651 /** 652 * sta_info_flush - flush matching STA entries from the STA table 653 * 654 * Returns the number of removed STA entries. 655 * 656 * @sdata: sdata to remove all stations from 657 * @vlans: if the given interface is an AP interface, also flush VLANs 658 */ 659 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 660 661 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 662 { 663 return __sta_info_flush(sdata, false); 664 } 665 666 void sta_set_rate_info_tx(struct sta_info *sta, 667 const struct ieee80211_tx_rate *rate, 668 struct rate_info *rinfo); 669 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 670 671 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 672 unsigned long exp_time); 673 u8 sta_info_tx_streams(struct sta_info *sta); 674 675 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 676 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 677 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 678 679 #endif /* STA_INFO_H */ 680