1 /* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * Copyright 2013-2014 Intel Mobile Communications GmbH 4 * Copyright(c) 2015-2016 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 <linux/u64_stats_sync.h> 22 #include "key.h" 23 24 /** 25 * enum ieee80211_sta_info_flags - Stations flags 26 * 27 * These flags are used with &struct sta_info's @flags member, but 28 * only indirectly with set_sta_flag() and friends. 29 * 30 * @WLAN_STA_AUTH: Station is authenticated. 31 * @WLAN_STA_ASSOC: Station is associated. 32 * @WLAN_STA_PS_STA: Station is in power-save mode 33 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 34 * This bit is always checked so needs to be enabled for all stations 35 * when virtual port control is not in use. 36 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 37 * frames. 38 * @WLAN_STA_WDS: Station is one of our WDS peers. 39 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 40 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 41 * frame to this station is transmitted. 42 * @WLAN_STA_MFP: Management frame protection is used with this STA. 43 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 44 * during suspend/resume and station removal. 45 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 46 * power-save mode logically to flush frames that might still 47 * be in the queues 48 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 49 * station in power-save mode, reply when the driver unblocks. 50 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 51 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 52 * packets. This means the link is enabled. 53 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 54 * station. 55 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 56 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 57 * TDLS peer 58 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on 59 * the BSS base channel. 60 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 61 * keeping station in power-save mode, reply when the driver 62 * unblocks the station. 63 * @WLAN_STA_SP: Station is in a service period, so don't try to 64 * reply to other uAPSD trigger frames or PS-Poll. 65 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 66 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 67 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 68 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 69 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 70 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 71 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 72 * until pending frames are delivered 73 * 74 * @NUM_WLAN_STA_FLAGS: number of defined flags 75 */ 76 enum ieee80211_sta_info_flags { 77 WLAN_STA_AUTH, 78 WLAN_STA_ASSOC, 79 WLAN_STA_PS_STA, 80 WLAN_STA_AUTHORIZED, 81 WLAN_STA_SHORT_PREAMBLE, 82 WLAN_STA_WDS, 83 WLAN_STA_CLEAR_PS_FILT, 84 WLAN_STA_MFP, 85 WLAN_STA_BLOCK_BA, 86 WLAN_STA_PS_DRIVER, 87 WLAN_STA_PSPOLL, 88 WLAN_STA_TDLS_PEER, 89 WLAN_STA_TDLS_PEER_AUTH, 90 WLAN_STA_TDLS_INITIATOR, 91 WLAN_STA_TDLS_CHAN_SWITCH, 92 WLAN_STA_TDLS_OFF_CHANNEL, 93 WLAN_STA_TDLS_WIDER_BW, 94 WLAN_STA_UAPSD, 95 WLAN_STA_SP, 96 WLAN_STA_4ADDR_EVENT, 97 WLAN_STA_INSERTED, 98 WLAN_STA_RATE_CONTROL, 99 WLAN_STA_TOFFSET_KNOWN, 100 WLAN_STA_MPSP_OWNER, 101 WLAN_STA_MPSP_RECIPIENT, 102 WLAN_STA_PS_DELIVER, 103 104 NUM_WLAN_STA_FLAGS, 105 }; 106 107 #define ADDBA_RESP_INTERVAL HZ 108 #define HT_AGG_MAX_RETRIES 15 109 #define HT_AGG_BURST_RETRIES 3 110 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 111 112 #define HT_AGG_STATE_DRV_READY 0 113 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 114 #define HT_AGG_STATE_OPERATIONAL 2 115 #define HT_AGG_STATE_STOPPING 3 116 #define HT_AGG_STATE_WANT_START 4 117 #define HT_AGG_STATE_WANT_STOP 5 118 119 enum ieee80211_agg_stop_reason { 120 AGG_STOP_DECLINED, 121 AGG_STOP_LOCAL_REQUEST, 122 AGG_STOP_PEER_REQUEST, 123 AGG_STOP_DESTROY_STA, 124 }; 125 126 /** 127 * struct tid_ampdu_tx - TID aggregation information (Tx). 128 * 129 * @rcu_head: rcu head for freeing structure 130 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 131 * @addba_resp_timer: timer for peer's response to addba request 132 * @pending: pending frames queue -- use sta's spinlock to protect 133 * @dialog_token: dialog token for aggregation session 134 * @timeout: session timeout value to be filled in ADDBA requests 135 * @state: session state (see above) 136 * @last_tx: jiffies of last tx activity 137 * @stop_initiator: initiator of a session stop 138 * @tx_stop: TX DelBA frame when stopping 139 * @buf_size: reorder buffer size at receiver 140 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 141 * @bar_pending: BAR needs to be re-sent 142 * @amsdu: support A-MSDU withing A-MDPU 143 * 144 * This structure's lifetime is managed by RCU, assignments to 145 * the array holding it must hold the aggregation mutex. 146 * 147 * The TX path can access it under RCU lock-free if, and 148 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 149 * set. Otherwise, the TX path must also acquire the spinlock 150 * and re-check the state, see comments in the tx code 151 * touching it. 152 */ 153 struct tid_ampdu_tx { 154 struct rcu_head rcu_head; 155 struct timer_list session_timer; 156 struct timer_list addba_resp_timer; 157 struct sk_buff_head pending; 158 unsigned long state; 159 unsigned long last_tx; 160 u16 timeout; 161 u8 dialog_token; 162 u8 stop_initiator; 163 bool tx_stop; 164 u8 buf_size; 165 166 u16 failed_bar_ssn; 167 bool bar_pending; 168 bool amsdu; 169 }; 170 171 /** 172 * struct tid_ampdu_rx - TID aggregation information (Rx). 173 * 174 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 175 * A-MSDU with individually reported subframes. 176 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 177 * the reorder buffer that should be ignored when releasing frames 178 * @reorder_time: jiffies when skb was added 179 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 180 * @reorder_timer: releases expired frames from the reorder buffer. 181 * @last_rx: jiffies of last rx activity 182 * @head_seq_num: head sequence number in reordering buffer. 183 * @stored_mpdu_num: number of MPDUs in reordering buffer 184 * @ssn: Starting Sequence Number expected to be aggregated. 185 * @buf_size: buffer size for incoming A-MPDUs 186 * @timeout: reset timer value (in TUs). 187 * @rcu_head: RCU head used for freeing this struct 188 * @reorder_lock: serializes access to reorder buffer, see below. 189 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 190 * and ssn. 191 * @removed: this session is removed (but might have been found due to RCU) 192 * 193 * This structure's lifetime is managed by RCU, assignments to 194 * the array holding it must hold the aggregation mutex. 195 * 196 * The @reorder_lock is used to protect the members of this 197 * struct, except for @timeout, @buf_size and @dialog_token, 198 * which are constant across the lifetime of the struct (the 199 * dialog token being used only for debugging). 200 */ 201 struct tid_ampdu_rx { 202 struct rcu_head rcu_head; 203 spinlock_t reorder_lock; 204 u64 reorder_buf_filtered; 205 struct sk_buff_head *reorder_buf; 206 unsigned long *reorder_time; 207 struct timer_list session_timer; 208 struct timer_list reorder_timer; 209 unsigned long last_rx; 210 u16 head_seq_num; 211 u16 stored_mpdu_num; 212 u16 ssn; 213 u16 buf_size; 214 u16 timeout; 215 bool auto_seq; 216 bool removed; 217 }; 218 219 /** 220 * struct sta_ampdu_mlme - STA aggregation information. 221 * 222 * @mtx: mutex to protect all TX data (except non-NULL assignments 223 * to tid_tx[idx], which are protected by the sta spinlock) 224 * tid_start_tx is also protected by sta->lock. 225 * @tid_rx: aggregation info for Rx per TID -- RCU protected 226 * @tid_rx_token: dialog tokens for valid aggregation sessions 227 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 228 * RX timer expired until the work for it runs 229 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 230 * driver requested to close until the work for it runs 231 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 232 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 233 * unexpected aggregation related frames outside a session 234 * @work: work struct for starting/stopping aggregation 235 * @tid_tx: aggregation info for Tx per TID 236 * @tid_start_tx: sessions where start was requested 237 * @last_addba_req_time: timestamp of the last addBA request. 238 * @addba_req_num: number of times addBA request has been sent. 239 * @dialog_token_allocator: dialog token enumerator for each new session; 240 */ 241 struct sta_ampdu_mlme { 242 struct mutex mtx; 243 /* rx */ 244 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 245 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 246 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 247 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 248 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 249 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 250 /* tx */ 251 struct work_struct work; 252 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 253 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 254 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 255 u8 addba_req_num[IEEE80211_NUM_TIDS]; 256 u8 dialog_token_allocator; 257 }; 258 259 260 /* Value to indicate no TID reservation */ 261 #define IEEE80211_TID_UNRESERVED 0xff 262 263 #define IEEE80211_FAST_XMIT_MAX_IV 18 264 265 /** 266 * struct ieee80211_fast_tx - TX fastpath information 267 * @key: key to use for hw crypto 268 * @hdr: the 802.11 header to put with the frame 269 * @hdr_len: actual 802.11 header length 270 * @sa_offs: offset of the SA 271 * @da_offs: offset of the DA 272 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 273 * @band: band this will be transmitted on, for tx_info 274 * @rcu_head: RCU head to free this struct 275 * 276 * This struct is small enough so that the common case (maximum crypto 277 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 278 * cache line. 279 */ 280 struct ieee80211_fast_tx { 281 struct ieee80211_key *key; 282 u8 hdr_len; 283 u8 sa_offs, da_offs, pn_offs; 284 u8 band; 285 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 286 sizeof(rfc1042_header)] __aligned(2); 287 288 struct rcu_head rcu_head; 289 }; 290 291 /** 292 * struct ieee80211_fast_rx - RX fastpath information 293 * @dev: netdevice for reporting the SKB 294 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 295 * @vif_addr: interface address 296 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 297 * @control_port_protocol: control port protocol copied from sdata 298 * @expected_ds_bits: from/to DS bits expected 299 * @icv_len: length of the MIC if present 300 * @key: bool indicating encryption is expected (key is set) 301 * @sta_notify: notify the MLME code (once) 302 * @internal_forward: forward froms internally on AP/VLAN type interfaces 303 * @uses_rss: copy of USES_RSS hw flag 304 * @da_offs: offset of the DA in the header (for header conversion) 305 * @sa_offs: offset of the SA in the header (for header conversion) 306 * @rcu_head: RCU head for freeing this structure 307 */ 308 struct ieee80211_fast_rx { 309 struct net_device *dev; 310 enum nl80211_iftype vif_type; 311 u8 vif_addr[ETH_ALEN] __aligned(2); 312 u8 rfc1042_hdr[6] __aligned(2); 313 __be16 control_port_protocol; 314 __le16 expected_ds_bits; 315 u8 icv_len; 316 u8 key:1, 317 sta_notify:1, 318 internal_forward:1, 319 uses_rss:1; 320 u8 da_offs, sa_offs; 321 322 struct rcu_head rcu_head; 323 }; 324 325 /** 326 * struct mesh_sta - mesh STA information 327 * @plink_lock: serialize access to plink fields 328 * @llid: Local link ID 329 * @plid: Peer link ID 330 * @aid: local aid supplied by peer 331 * @reason: Cancel reason on PLINK_HOLDING state 332 * @plink_retries: Retries in establishment 333 * @plink_state: peer link state 334 * @plink_timeout: timeout of peer link 335 * @plink_timer: peer link watch timer 336 * @t_offset: timing offset relative to this host 337 * @t_offset_setpoint: reference timing offset of this sta to be used when 338 * calculating clockdrift 339 * @local_pm: local link-specific power save mode 340 * @peer_pm: peer-specific power save mode towards local STA 341 * @nonpeer_pm: STA power save mode towards non-peer neighbors 342 * @processed_beacon: set to true after peer rates and capabilities are 343 * processed 344 * @fail_avg: moving percentage of failed MSDUs 345 */ 346 struct mesh_sta { 347 struct timer_list plink_timer; 348 349 s64 t_offset; 350 s64 t_offset_setpoint; 351 352 spinlock_t plink_lock; 353 u16 llid; 354 u16 plid; 355 u16 aid; 356 u16 reason; 357 u8 plink_retries; 358 359 bool processed_beacon; 360 361 enum nl80211_plink_state plink_state; 362 u32 plink_timeout; 363 364 /* mesh power save */ 365 enum nl80211_mesh_power_mode local_pm; 366 enum nl80211_mesh_power_mode peer_pm; 367 enum nl80211_mesh_power_mode nonpeer_pm; 368 369 /* moving percentage of failed MSDUs */ 370 unsigned int fail_avg; 371 }; 372 373 DECLARE_EWMA(signal, 1024, 8) 374 375 struct ieee80211_sta_rx_stats { 376 unsigned long packets; 377 unsigned long last_rx; 378 unsigned long num_duplicates; 379 unsigned long fragments; 380 unsigned long dropped; 381 int last_signal; 382 u8 chains; 383 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 384 u16 last_rate; 385 struct u64_stats_sync syncp; 386 u64 bytes; 387 u64 msdu[IEEE80211_NUM_TIDS + 1]; 388 }; 389 390 /** 391 * struct sta_info - STA information 392 * 393 * This structure collects information about a station that 394 * mac80211 is communicating with. 395 * 396 * @list: global linked list entry 397 * @free_list: list entry for keeping track of stations to free 398 * @hash_node: hash node for rhashtable 399 * @addr: station's MAC address - duplicated from public part to 400 * let the hash table work with just a single cacheline 401 * @local: pointer to the global information 402 * @sdata: virtual interface this station belongs to 403 * @ptk: peer keys negotiated with this station, if any 404 * @ptk_idx: last installed peer key index 405 * @gtk: group keys negotiated with this station, if any 406 * @rate_ctrl: rate control algorithm reference 407 * @rate_ctrl_lock: spinlock used to protect rate control data 408 * (data inside the algorithm, so serializes calls there) 409 * @rate_ctrl_priv: rate control private per-STA pointer 410 * @lock: used for locking all fields that require locking, see comments 411 * in the header file. 412 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 413 * @listen_interval: listen interval of this station, when we're acting as AP 414 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 415 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 416 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 417 * when it leaves power saving state or polls 418 * @tx_filtered: buffers (per AC) of frames we already tried to 419 * transmit but were filtered by hardware due to STA having 420 * entered power saving state, these are also delivered to 421 * the station when it leaves powersave or polls for frames 422 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 423 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 424 * @last_connected: time (in seconds) when a station got connected 425 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 426 * plus one for non-QoS frames) 427 * @tid_seq: per-TID sequence numbers for sending to this STA 428 * @ampdu_mlme: A-MPDU state machine state 429 * @timer_to_tid: identity mapping to ID timers 430 * @mesh: mesh STA information 431 * @debugfs_dir: debug filesystem directory dentry 432 * @dead: set to true when sta is unlinked 433 * @removed: set to true when sta is being removed from sta_list 434 * @uploaded: set to true when sta is uploaded to the driver 435 * @sta: station information we share with the driver 436 * @sta_state: duplicates information about station state (for debug) 437 * @rcu_head: RCU head used for freeing this station struct 438 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 439 * taken from HT/VHT capabilities or VHT operating mode notification 440 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 441 * AP only. 442 * @cipher_scheme: optional cipher scheme for this station 443 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 444 * @fast_tx: TX fastpath information 445 * @fast_rx: RX fastpath information 446 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 447 * the BSS one. 448 * @tx_stats: TX statistics 449 * @rx_stats: RX statistics 450 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 451 * this (by advertising the USES_RSS hw flag) 452 * @status_stats: TX status statistics 453 */ 454 struct sta_info { 455 /* General information, mostly static */ 456 struct list_head list, free_list; 457 struct rcu_head rcu_head; 458 struct rhlist_head hash_node; 459 u8 addr[ETH_ALEN]; 460 struct ieee80211_local *local; 461 struct ieee80211_sub_if_data *sdata; 462 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 463 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 464 u8 ptk_idx; 465 struct rate_control_ref *rate_ctrl; 466 void *rate_ctrl_priv; 467 spinlock_t rate_ctrl_lock; 468 spinlock_t lock; 469 470 struct ieee80211_fast_tx __rcu *fast_tx; 471 struct ieee80211_fast_rx __rcu *fast_rx; 472 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 473 474 #ifdef CONFIG_MAC80211_MESH 475 struct mesh_sta *mesh; 476 #endif 477 478 struct work_struct drv_deliver_wk; 479 480 u16 listen_interval; 481 482 bool dead; 483 bool removed; 484 485 bool uploaded; 486 487 enum ieee80211_sta_state sta_state; 488 489 /* use the accessors defined below */ 490 unsigned long _flags; 491 492 /* STA powersave lock and frame queues */ 493 spinlock_t ps_lock; 494 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 495 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 496 unsigned long driver_buffered_tids; 497 unsigned long txq_buffered_tids; 498 499 long last_connected; 500 501 /* Updated from RX path only, no locking requirements */ 502 struct ieee80211_sta_rx_stats rx_stats; 503 struct { 504 struct ewma_signal signal; 505 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 506 } rx_stats_avg; 507 508 /* Plus 1 for non-QoS frames */ 509 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 510 511 /* Updated from TX status path only, no locking requirements */ 512 struct { 513 unsigned long filtered; 514 unsigned long retry_failed, retry_count; 515 unsigned int lost_packets; 516 unsigned long last_tdls_pkt_time; 517 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 518 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 519 unsigned long last_ack; 520 } status_stats; 521 522 /* Updated from TX path only, no locking requirements */ 523 struct { 524 u64 packets[IEEE80211_NUM_ACS]; 525 u64 bytes[IEEE80211_NUM_ACS]; 526 struct ieee80211_tx_rate last_rate; 527 u64 msdu[IEEE80211_NUM_TIDS + 1]; 528 } tx_stats; 529 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 530 531 /* 532 * Aggregation information, locked with lock. 533 */ 534 struct sta_ampdu_mlme ampdu_mlme; 535 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 536 537 #ifdef CONFIG_MAC80211_DEBUGFS 538 struct dentry *debugfs_dir; 539 #endif 540 541 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 542 543 enum ieee80211_smps_mode known_smps_mode; 544 const struct ieee80211_cipher_scheme *cipher_scheme; 545 546 u8 reserved_tid; 547 548 struct cfg80211_chan_def tdls_chandef; 549 550 /* keep last! */ 551 struct ieee80211_sta sta; 552 }; 553 554 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 555 { 556 #ifdef CONFIG_MAC80211_MESH 557 return sta->mesh->plink_state; 558 #endif 559 return NL80211_PLINK_LISTEN; 560 } 561 562 static inline void set_sta_flag(struct sta_info *sta, 563 enum ieee80211_sta_info_flags flag) 564 { 565 WARN_ON(flag == WLAN_STA_AUTH || 566 flag == WLAN_STA_ASSOC || 567 flag == WLAN_STA_AUTHORIZED); 568 set_bit(flag, &sta->_flags); 569 } 570 571 static inline void clear_sta_flag(struct sta_info *sta, 572 enum ieee80211_sta_info_flags flag) 573 { 574 WARN_ON(flag == WLAN_STA_AUTH || 575 flag == WLAN_STA_ASSOC || 576 flag == WLAN_STA_AUTHORIZED); 577 clear_bit(flag, &sta->_flags); 578 } 579 580 static inline int test_sta_flag(struct sta_info *sta, 581 enum ieee80211_sta_info_flags flag) 582 { 583 return test_bit(flag, &sta->_flags); 584 } 585 586 static inline int test_and_clear_sta_flag(struct sta_info *sta, 587 enum ieee80211_sta_info_flags flag) 588 { 589 WARN_ON(flag == WLAN_STA_AUTH || 590 flag == WLAN_STA_ASSOC || 591 flag == WLAN_STA_AUTHORIZED); 592 return test_and_clear_bit(flag, &sta->_flags); 593 } 594 595 static inline int test_and_set_sta_flag(struct sta_info *sta, 596 enum ieee80211_sta_info_flags flag) 597 { 598 WARN_ON(flag == WLAN_STA_AUTH || 599 flag == WLAN_STA_ASSOC || 600 flag == WLAN_STA_AUTHORIZED); 601 return test_and_set_bit(flag, &sta->_flags); 602 } 603 604 int sta_info_move_state(struct sta_info *sta, 605 enum ieee80211_sta_state new_state); 606 607 static inline void sta_info_pre_move_state(struct sta_info *sta, 608 enum ieee80211_sta_state new_state) 609 { 610 int ret; 611 612 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 613 614 ret = sta_info_move_state(sta, new_state); 615 WARN_ON_ONCE(ret); 616 } 617 618 619 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 620 struct tid_ampdu_tx *tid_tx); 621 622 static inline struct tid_ampdu_tx * 623 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 624 { 625 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 626 lockdep_is_held(&sta->lock) || 627 lockdep_is_held(&sta->ampdu_mlme.mtx)); 628 } 629 630 /* Maximum number of frames to buffer per power saving station per AC */ 631 #define STA_MAX_TX_BUFFER 64 632 633 /* Minimum buffered frame expiry time. If STA uses listen interval that is 634 * smaller than this value, the minimum value here is used instead. */ 635 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 636 637 /* How often station data is cleaned up (e.g., expiration of buffered frames) 638 */ 639 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 640 641 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 642 const u8 *addr); 643 644 /* 645 * Get a STA info, must be under RCU read lock. 646 */ 647 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 648 const u8 *addr); 649 650 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 651 const u8 *addr); 652 653 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 654 rhl_for_each_entry_rcu(_sta, _tmp, \ 655 sta_info_hash_lookup(local, _addr), hash_node) 656 657 /* 658 * Get STA info by index, BROKEN! 659 */ 660 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 661 int idx); 662 /* 663 * Create a new STA info, caller owns returned structure 664 * until sta_info_insert(). 665 */ 666 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 667 const u8 *addr, gfp_t gfp); 668 669 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 670 671 /* 672 * Insert STA info into hash table/list, returns zero or a 673 * -EEXIST if (if the same MAC address is already present). 674 * 675 * Calling the non-rcu version makes the caller relinquish, 676 * the _rcu version calls read_lock_rcu() and must be called 677 * without it held. 678 */ 679 int sta_info_insert(struct sta_info *sta); 680 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 681 682 int __must_check __sta_info_destroy(struct sta_info *sta); 683 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 684 const u8 *addr); 685 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 686 const u8 *addr); 687 688 void sta_info_recalc_tim(struct sta_info *sta); 689 690 int sta_info_init(struct ieee80211_local *local); 691 void sta_info_stop(struct ieee80211_local *local); 692 693 /** 694 * sta_info_flush - flush matching STA entries from the STA table 695 * 696 * Returns the number of removed STA entries. 697 * 698 * @sdata: sdata to remove all stations from 699 * @vlans: if the given interface is an AP interface, also flush VLANs 700 */ 701 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 702 703 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 704 { 705 return __sta_info_flush(sdata, false); 706 } 707 708 void sta_set_rate_info_tx(struct sta_info *sta, 709 const struct ieee80211_tx_rate *rate, 710 struct rate_info *rinfo); 711 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 712 713 u32 sta_get_expected_throughput(struct sta_info *sta); 714 715 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 716 unsigned long exp_time); 717 u8 sta_info_tx_streams(struct sta_info *sta); 718 719 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 720 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 721 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 722 723 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 724 725 #define STA_STATS_RATE_INVALID 0 726 #define STA_STATS_RATE_VHT 0x8000 727 #define STA_STATS_RATE_HT 0x4000 728 #define STA_STATS_RATE_LEGACY 0x2000 729 #define STA_STATS_RATE_SGI 0x1000 730 #define STA_STATS_RATE_BW_SHIFT 9 731 #define STA_STATS_RATE_BW_MASK (0x7 << STA_STATS_RATE_BW_SHIFT) 732 733 static inline u16 sta_stats_encode_rate(struct ieee80211_rx_status *s) 734 { 735 u16 r = s->rate_idx; 736 737 if (s->vht_flag & RX_VHT_FLAG_80MHZ) 738 r |= RATE_INFO_BW_80 << STA_STATS_RATE_BW_SHIFT; 739 else if (s->vht_flag & RX_VHT_FLAG_160MHZ) 740 r |= RATE_INFO_BW_160 << STA_STATS_RATE_BW_SHIFT; 741 else if (s->flag & RX_FLAG_40MHZ) 742 r |= RATE_INFO_BW_40 << STA_STATS_RATE_BW_SHIFT; 743 else if (s->flag & RX_FLAG_10MHZ) 744 r |= RATE_INFO_BW_10 << STA_STATS_RATE_BW_SHIFT; 745 else if (s->flag & RX_FLAG_5MHZ) 746 r |= RATE_INFO_BW_5 << STA_STATS_RATE_BW_SHIFT; 747 else 748 r |= RATE_INFO_BW_20 << STA_STATS_RATE_BW_SHIFT; 749 750 if (s->flag & RX_FLAG_SHORT_GI) 751 r |= STA_STATS_RATE_SGI; 752 753 if (s->flag & RX_FLAG_VHT) 754 r |= STA_STATS_RATE_VHT | (s->vht_nss << 4); 755 else if (s->flag & RX_FLAG_HT) 756 r |= STA_STATS_RATE_HT; 757 else 758 r |= STA_STATS_RATE_LEGACY | (s->band << 4); 759 760 return r; 761 } 762 763 #endif /* STA_INFO_H */ 764