1 /* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * Copyright 2013-2014 Intel Mobile Communications GmbH 4 * Copyright(c) 2015-2017 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/bitfield.h> 20 #include <linux/etherdevice.h> 21 #include <linux/rhashtable.h> 22 #include <linux/u64_stats_sync.h> 23 #include "key.h" 24 25 /** 26 * enum ieee80211_sta_info_flags - Stations flags 27 * 28 * These flags are used with &struct sta_info's @flags member, but 29 * only indirectly with set_sta_flag() and friends. 30 * 31 * @WLAN_STA_AUTH: Station is authenticated. 32 * @WLAN_STA_ASSOC: Station is associated. 33 * @WLAN_STA_PS_STA: Station is in power-save mode 34 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 35 * This bit is always checked so needs to be enabled for all stations 36 * when virtual port control is not in use. 37 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 38 * frames. 39 * @WLAN_STA_WDS: Station is one of our WDS peers. 40 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 41 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 42 * frame to this station is transmitted. 43 * @WLAN_STA_MFP: Management frame protection is used with this STA. 44 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 45 * during suspend/resume and station removal. 46 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 47 * power-save mode logically to flush frames that might still 48 * be in the queues 49 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 50 * station in power-save mode, reply when the driver unblocks. 51 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 52 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 53 * packets. This means the link is enabled. 54 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 55 * station. 56 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 57 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 58 * TDLS peer 59 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on 60 * the BSS base channel. 61 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 62 * keeping station in power-save mode, reply when the driver 63 * unblocks the station. 64 * @WLAN_STA_SP: Station is in a service period, so don't try to 65 * reply to other uAPSD trigger frames or PS-Poll. 66 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 67 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 68 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 69 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 70 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 71 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 72 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 73 * until pending frames are delivered 74 * 75 * @NUM_WLAN_STA_FLAGS: number of defined flags 76 */ 77 enum ieee80211_sta_info_flags { 78 WLAN_STA_AUTH, 79 WLAN_STA_ASSOC, 80 WLAN_STA_PS_STA, 81 WLAN_STA_AUTHORIZED, 82 WLAN_STA_SHORT_PREAMBLE, 83 WLAN_STA_WDS, 84 WLAN_STA_CLEAR_PS_FILT, 85 WLAN_STA_MFP, 86 WLAN_STA_BLOCK_BA, 87 WLAN_STA_PS_DRIVER, 88 WLAN_STA_PSPOLL, 89 WLAN_STA_TDLS_PEER, 90 WLAN_STA_TDLS_PEER_AUTH, 91 WLAN_STA_TDLS_INITIATOR, 92 WLAN_STA_TDLS_CHAN_SWITCH, 93 WLAN_STA_TDLS_OFF_CHANNEL, 94 WLAN_STA_TDLS_WIDER_BW, 95 WLAN_STA_UAPSD, 96 WLAN_STA_SP, 97 WLAN_STA_4ADDR_EVENT, 98 WLAN_STA_INSERTED, 99 WLAN_STA_RATE_CONTROL, 100 WLAN_STA_TOFFSET_KNOWN, 101 WLAN_STA_MPSP_OWNER, 102 WLAN_STA_MPSP_RECIPIENT, 103 WLAN_STA_PS_DELIVER, 104 105 NUM_WLAN_STA_FLAGS, 106 }; 107 108 #define ADDBA_RESP_INTERVAL HZ 109 #define HT_AGG_MAX_RETRIES 15 110 #define HT_AGG_BURST_RETRIES 3 111 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 112 113 #define HT_AGG_STATE_DRV_READY 0 114 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 115 #define HT_AGG_STATE_OPERATIONAL 2 116 #define HT_AGG_STATE_STOPPING 3 117 #define HT_AGG_STATE_WANT_START 4 118 #define HT_AGG_STATE_WANT_STOP 5 119 120 enum ieee80211_agg_stop_reason { 121 AGG_STOP_DECLINED, 122 AGG_STOP_LOCAL_REQUEST, 123 AGG_STOP_PEER_REQUEST, 124 AGG_STOP_DESTROY_STA, 125 }; 126 127 /** 128 * struct tid_ampdu_tx - TID aggregation information (Tx). 129 * 130 * @rcu_head: rcu head for freeing structure 131 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 132 * @addba_resp_timer: timer for peer's response to addba request 133 * @pending: pending frames queue -- use sta's spinlock to protect 134 * @dialog_token: dialog token for aggregation session 135 * @timeout: session timeout value to be filled in ADDBA requests 136 * @state: session state (see above) 137 * @last_tx: jiffies of last tx activity 138 * @stop_initiator: initiator of a session stop 139 * @tx_stop: TX DelBA frame when stopping 140 * @buf_size: reorder buffer size at receiver 141 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 142 * @bar_pending: BAR needs to be re-sent 143 * @amsdu: support A-MSDU withing A-MDPU 144 * 145 * This structure's lifetime is managed by RCU, assignments to 146 * the array holding it must hold the aggregation mutex. 147 * 148 * The TX path can access it under RCU lock-free if, and 149 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 150 * set. Otherwise, the TX path must also acquire the spinlock 151 * and re-check the state, see comments in the tx code 152 * touching it. 153 */ 154 struct tid_ampdu_tx { 155 struct rcu_head rcu_head; 156 struct timer_list session_timer; 157 struct timer_list addba_resp_timer; 158 struct sk_buff_head pending; 159 unsigned long state; 160 unsigned long last_tx; 161 u16 timeout; 162 u8 dialog_token; 163 u8 stop_initiator; 164 bool tx_stop; 165 u8 buf_size; 166 167 u16 failed_bar_ssn; 168 bool bar_pending; 169 bool amsdu; 170 }; 171 172 /** 173 * struct tid_ampdu_rx - TID aggregation information (Rx). 174 * 175 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 176 * A-MSDU with individually reported subframes. 177 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 178 * the reorder buffer that should be ignored when releasing frames 179 * @reorder_time: jiffies when skb was added 180 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 181 * @reorder_timer: releases expired frames from the reorder buffer. 182 * @last_rx: jiffies of last rx activity 183 * @head_seq_num: head sequence number in reordering buffer. 184 * @stored_mpdu_num: number of MPDUs in reordering buffer 185 * @ssn: Starting Sequence Number expected to be aggregated. 186 * @buf_size: buffer size for incoming A-MPDUs 187 * @timeout: reset timer value (in TUs). 188 * @rcu_head: RCU head used for freeing this struct 189 * @reorder_lock: serializes access to reorder buffer, see below. 190 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 191 * and ssn. 192 * @removed: this session is removed (but might have been found due to RCU) 193 * @started: this session has started (head ssn or higher was received) 194 * 195 * This structure's lifetime is managed by RCU, assignments to 196 * the array holding it must hold the aggregation mutex. 197 * 198 * The @reorder_lock is used to protect the members of this 199 * struct, except for @timeout, @buf_size and @dialog_token, 200 * which are constant across the lifetime of the struct (the 201 * dialog token being used only for debugging). 202 */ 203 struct tid_ampdu_rx { 204 struct rcu_head rcu_head; 205 spinlock_t reorder_lock; 206 u64 reorder_buf_filtered; 207 struct sk_buff_head *reorder_buf; 208 unsigned long *reorder_time; 209 struct timer_list session_timer; 210 struct timer_list reorder_timer; 211 unsigned long last_rx; 212 u16 head_seq_num; 213 u16 stored_mpdu_num; 214 u16 ssn; 215 u16 buf_size; 216 u16 timeout; 217 u8 auto_seq:1, 218 removed:1, 219 started:1; 220 }; 221 222 /** 223 * struct sta_ampdu_mlme - STA aggregation information. 224 * 225 * @mtx: mutex to protect all TX data (except non-NULL assignments 226 * to tid_tx[idx], which are protected by the sta spinlock) 227 * tid_start_tx is also protected by sta->lock. 228 * @tid_rx: aggregation info for Rx per TID -- RCU protected 229 * @tid_rx_token: dialog tokens for valid aggregation sessions 230 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 231 * RX timer expired until the work for it runs 232 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 233 * driver requested to close until the work for it runs 234 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 235 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 236 * unexpected aggregation related frames outside a session 237 * @work: work struct for starting/stopping aggregation 238 * @tid_tx: aggregation info for Tx per TID 239 * @tid_start_tx: sessions where start was requested 240 * @last_addba_req_time: timestamp of the last addBA request. 241 * @addba_req_num: number of times addBA request has been sent. 242 * @dialog_token_allocator: dialog token enumerator for each new session; 243 */ 244 struct sta_ampdu_mlme { 245 struct mutex mtx; 246 /* rx */ 247 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 248 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 249 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 250 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 251 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 252 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 253 /* tx */ 254 struct work_struct work; 255 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 256 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 257 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 258 u8 addba_req_num[IEEE80211_NUM_TIDS]; 259 u8 dialog_token_allocator; 260 }; 261 262 263 /* Value to indicate no TID reservation */ 264 #define IEEE80211_TID_UNRESERVED 0xff 265 266 #define IEEE80211_FAST_XMIT_MAX_IV 18 267 268 /** 269 * struct ieee80211_fast_tx - TX fastpath information 270 * @key: key to use for hw crypto 271 * @hdr: the 802.11 header to put with the frame 272 * @hdr_len: actual 802.11 header length 273 * @sa_offs: offset of the SA 274 * @da_offs: offset of the DA 275 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 276 * @band: band this will be transmitted on, for tx_info 277 * @rcu_head: RCU head to free this struct 278 * 279 * This struct is small enough so that the common case (maximum crypto 280 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 281 * cache line. 282 */ 283 struct ieee80211_fast_tx { 284 struct ieee80211_key *key; 285 u8 hdr_len; 286 u8 sa_offs, da_offs, pn_offs; 287 u8 band; 288 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 289 sizeof(rfc1042_header)] __aligned(2); 290 291 struct rcu_head rcu_head; 292 }; 293 294 /** 295 * struct ieee80211_fast_rx - RX fastpath information 296 * @dev: netdevice for reporting the SKB 297 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 298 * @vif_addr: interface address 299 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 300 * @control_port_protocol: control port protocol copied from sdata 301 * @expected_ds_bits: from/to DS bits expected 302 * @icv_len: length of the MIC if present 303 * @key: bool indicating encryption is expected (key is set) 304 * @sta_notify: notify the MLME code (once) 305 * @internal_forward: forward froms internally on AP/VLAN type interfaces 306 * @uses_rss: copy of USES_RSS hw flag 307 * @da_offs: offset of the DA in the header (for header conversion) 308 * @sa_offs: offset of the SA in the header (for header conversion) 309 * @rcu_head: RCU head for freeing this structure 310 */ 311 struct ieee80211_fast_rx { 312 struct net_device *dev; 313 enum nl80211_iftype vif_type; 314 u8 vif_addr[ETH_ALEN] __aligned(2); 315 u8 rfc1042_hdr[6] __aligned(2); 316 __be16 control_port_protocol; 317 __le16 expected_ds_bits; 318 u8 icv_len; 319 u8 key:1, 320 sta_notify:1, 321 internal_forward:1, 322 uses_rss:1; 323 u8 da_offs, sa_offs; 324 325 struct rcu_head rcu_head; 326 }; 327 328 /* we use only values in the range 0-100, so pick a large precision */ 329 DECLARE_EWMA(mesh_fail_avg, 20, 8) 330 331 /** 332 * struct mesh_sta - mesh STA information 333 * @plink_lock: serialize access to plink fields 334 * @llid: Local link ID 335 * @plid: Peer link ID 336 * @aid: local aid supplied by peer 337 * @reason: Cancel reason on PLINK_HOLDING state 338 * @plink_retries: Retries in establishment 339 * @plink_state: peer link state 340 * @plink_timeout: timeout of peer link 341 * @plink_timer: peer link watch timer 342 * @t_offset: timing offset relative to this host 343 * @t_offset_setpoint: reference timing offset of this sta to be used when 344 * calculating clockdrift 345 * @local_pm: local link-specific power save mode 346 * @peer_pm: peer-specific power save mode towards local STA 347 * @nonpeer_pm: STA power save mode towards non-peer neighbors 348 * @processed_beacon: set to true after peer rates and capabilities are 349 * processed 350 * @fail_avg: moving percentage of failed MSDUs 351 */ 352 struct mesh_sta { 353 struct timer_list plink_timer; 354 355 s64 t_offset; 356 s64 t_offset_setpoint; 357 358 spinlock_t plink_lock; 359 u16 llid; 360 u16 plid; 361 u16 aid; 362 u16 reason; 363 u8 plink_retries; 364 365 bool processed_beacon; 366 367 enum nl80211_plink_state plink_state; 368 u32 plink_timeout; 369 370 /* mesh power save */ 371 enum nl80211_mesh_power_mode local_pm; 372 enum nl80211_mesh_power_mode peer_pm; 373 enum nl80211_mesh_power_mode nonpeer_pm; 374 375 /* moving percentage of failed MSDUs */ 376 struct ewma_mesh_fail_avg fail_avg; 377 }; 378 379 DECLARE_EWMA(signal, 10, 8) 380 381 struct ieee80211_sta_rx_stats { 382 unsigned long packets; 383 unsigned long last_rx; 384 unsigned long num_duplicates; 385 unsigned long fragments; 386 unsigned long dropped; 387 int last_signal; 388 u8 chains; 389 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 390 u16 last_rate; 391 struct u64_stats_sync syncp; 392 u64 bytes; 393 u64 msdu[IEEE80211_NUM_TIDS + 1]; 394 }; 395 396 /** 397 * struct sta_info - STA information 398 * 399 * This structure collects information about a station that 400 * mac80211 is communicating with. 401 * 402 * @list: global linked list entry 403 * @free_list: list entry for keeping track of stations to free 404 * @hash_node: hash node for rhashtable 405 * @addr: station's MAC address - duplicated from public part to 406 * let the hash table work with just a single cacheline 407 * @local: pointer to the global information 408 * @sdata: virtual interface this station belongs to 409 * @ptk: peer keys negotiated with this station, if any 410 * @ptk_idx: last installed peer key index 411 * @gtk: group keys negotiated with this station, if any 412 * @rate_ctrl: rate control algorithm reference 413 * @rate_ctrl_lock: spinlock used to protect rate control data 414 * (data inside the algorithm, so serializes calls there) 415 * @rate_ctrl_priv: rate control private per-STA pointer 416 * @lock: used for locking all fields that require locking, see comments 417 * in the header file. 418 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 419 * @listen_interval: listen interval of this station, when we're acting as AP 420 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 421 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 422 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 423 * when it leaves power saving state or polls 424 * @tx_filtered: buffers (per AC) of frames we already tried to 425 * transmit but were filtered by hardware due to STA having 426 * entered power saving state, these are also delivered to 427 * the station when it leaves powersave or polls for frames 428 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 429 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 430 * @last_connected: time (in seconds) when a station got connected 431 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 432 * plus one for non-QoS frames) 433 * @tid_seq: per-TID sequence numbers for sending to this STA 434 * @ampdu_mlme: A-MPDU state machine state 435 * @timer_to_tid: identity mapping to ID timers 436 * @mesh: mesh STA information 437 * @debugfs_dir: debug filesystem directory dentry 438 * @dead: set to true when sta is unlinked 439 * @removed: set to true when sta is being removed from sta_list 440 * @uploaded: set to true when sta is uploaded to the driver 441 * @sta: station information we share with the driver 442 * @sta_state: duplicates information about station state (for debug) 443 * @rcu_head: RCU head used for freeing this station struct 444 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 445 * taken from HT/VHT capabilities or VHT operating mode notification 446 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 447 * AP only. 448 * @cipher_scheme: optional cipher scheme for this station 449 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 450 * @fast_tx: TX fastpath information 451 * @fast_rx: RX fastpath information 452 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 453 * the BSS one. 454 * @tx_stats: TX statistics 455 * @rx_stats: RX statistics 456 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 457 * this (by advertising the USES_RSS hw flag) 458 * @status_stats: TX status statistics 459 */ 460 struct sta_info { 461 /* General information, mostly static */ 462 struct list_head list, free_list; 463 struct rcu_head rcu_head; 464 struct rhlist_head hash_node; 465 u8 addr[ETH_ALEN]; 466 struct ieee80211_local *local; 467 struct ieee80211_sub_if_data *sdata; 468 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 469 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 470 u8 ptk_idx; 471 struct rate_control_ref *rate_ctrl; 472 void *rate_ctrl_priv; 473 spinlock_t rate_ctrl_lock; 474 spinlock_t lock; 475 476 struct ieee80211_fast_tx __rcu *fast_tx; 477 struct ieee80211_fast_rx __rcu *fast_rx; 478 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 479 480 #ifdef CONFIG_MAC80211_MESH 481 struct mesh_sta *mesh; 482 #endif 483 484 struct work_struct drv_deliver_wk; 485 486 u16 listen_interval; 487 488 bool dead; 489 bool removed; 490 491 bool uploaded; 492 493 enum ieee80211_sta_state sta_state; 494 495 /* use the accessors defined below */ 496 unsigned long _flags; 497 498 /* STA powersave lock and frame queues */ 499 spinlock_t ps_lock; 500 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 501 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 502 unsigned long driver_buffered_tids; 503 unsigned long txq_buffered_tids; 504 505 long last_connected; 506 507 /* Updated from RX path only, no locking requirements */ 508 struct ieee80211_sta_rx_stats rx_stats; 509 struct { 510 struct ewma_signal signal; 511 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 512 } rx_stats_avg; 513 514 /* Plus 1 for non-QoS frames */ 515 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 516 517 /* Updated from TX status path only, no locking requirements */ 518 struct { 519 unsigned long filtered; 520 unsigned long retry_failed, retry_count; 521 unsigned int lost_packets; 522 unsigned long last_tdls_pkt_time; 523 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 524 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 525 unsigned long last_ack; 526 } status_stats; 527 528 /* Updated from TX path only, no locking requirements */ 529 struct { 530 u64 packets[IEEE80211_NUM_ACS]; 531 u64 bytes[IEEE80211_NUM_ACS]; 532 struct ieee80211_tx_rate last_rate; 533 u64 msdu[IEEE80211_NUM_TIDS + 1]; 534 } tx_stats; 535 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 536 537 /* 538 * Aggregation information, locked with lock. 539 */ 540 struct sta_ampdu_mlme ampdu_mlme; 541 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 542 543 #ifdef CONFIG_MAC80211_DEBUGFS 544 struct dentry *debugfs_dir; 545 #endif 546 547 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 548 549 enum ieee80211_smps_mode known_smps_mode; 550 const struct ieee80211_cipher_scheme *cipher_scheme; 551 552 u8 reserved_tid; 553 554 struct cfg80211_chan_def tdls_chandef; 555 556 /* keep last! */ 557 struct ieee80211_sta sta; 558 }; 559 560 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 561 { 562 #ifdef CONFIG_MAC80211_MESH 563 return sta->mesh->plink_state; 564 #endif 565 return NL80211_PLINK_LISTEN; 566 } 567 568 static inline void 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 set_bit(flag, &sta->_flags); 575 } 576 577 static inline void clear_sta_flag(struct sta_info *sta, 578 enum ieee80211_sta_info_flags flag) 579 { 580 WARN_ON(flag == WLAN_STA_AUTH || 581 flag == WLAN_STA_ASSOC || 582 flag == WLAN_STA_AUTHORIZED); 583 clear_bit(flag, &sta->_flags); 584 } 585 586 static inline int test_sta_flag(struct sta_info *sta, 587 enum ieee80211_sta_info_flags flag) 588 { 589 return test_bit(flag, &sta->_flags); 590 } 591 592 static inline int test_and_clear_sta_flag(struct sta_info *sta, 593 enum ieee80211_sta_info_flags flag) 594 { 595 WARN_ON(flag == WLAN_STA_AUTH || 596 flag == WLAN_STA_ASSOC || 597 flag == WLAN_STA_AUTHORIZED); 598 return test_and_clear_bit(flag, &sta->_flags); 599 } 600 601 static inline int test_and_set_sta_flag(struct sta_info *sta, 602 enum ieee80211_sta_info_flags flag) 603 { 604 WARN_ON(flag == WLAN_STA_AUTH || 605 flag == WLAN_STA_ASSOC || 606 flag == WLAN_STA_AUTHORIZED); 607 return test_and_set_bit(flag, &sta->_flags); 608 } 609 610 int sta_info_move_state(struct sta_info *sta, 611 enum ieee80211_sta_state new_state); 612 613 static inline void sta_info_pre_move_state(struct sta_info *sta, 614 enum ieee80211_sta_state new_state) 615 { 616 int ret; 617 618 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 619 620 ret = sta_info_move_state(sta, new_state); 621 WARN_ON_ONCE(ret); 622 } 623 624 625 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 626 struct tid_ampdu_tx *tid_tx); 627 628 static inline struct tid_ampdu_tx * 629 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 630 { 631 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 632 lockdep_is_held(&sta->lock) || 633 lockdep_is_held(&sta->ampdu_mlme.mtx)); 634 } 635 636 /* Maximum number of frames to buffer per power saving station per AC */ 637 #define STA_MAX_TX_BUFFER 64 638 639 /* Minimum buffered frame expiry time. If STA uses listen interval that is 640 * smaller than this value, the minimum value here is used instead. */ 641 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 642 643 /* How often station data is cleaned up (e.g., expiration of buffered frames) 644 */ 645 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 646 647 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 648 const u8 *addr); 649 650 /* 651 * Get a STA info, must be under RCU read lock. 652 */ 653 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 654 const u8 *addr); 655 656 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 657 const u8 *addr); 658 659 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 660 rhl_for_each_entry_rcu(_sta, _tmp, \ 661 sta_info_hash_lookup(local, _addr), hash_node) 662 663 /* 664 * Get STA info by index, BROKEN! 665 */ 666 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 667 int idx); 668 /* 669 * Create a new STA info, caller owns returned structure 670 * until sta_info_insert(). 671 */ 672 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 673 const u8 *addr, gfp_t gfp); 674 675 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 676 677 /* 678 * Insert STA info into hash table/list, returns zero or a 679 * -EEXIST if (if the same MAC address is already present). 680 * 681 * Calling the non-rcu version makes the caller relinquish, 682 * the _rcu version calls read_lock_rcu() and must be called 683 * without it held. 684 */ 685 int sta_info_insert(struct sta_info *sta); 686 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 687 688 int __must_check __sta_info_destroy(struct sta_info *sta); 689 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 690 const u8 *addr); 691 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 692 const u8 *addr); 693 694 void sta_info_recalc_tim(struct sta_info *sta); 695 696 int sta_info_init(struct ieee80211_local *local); 697 void sta_info_stop(struct ieee80211_local *local); 698 699 /** 700 * sta_info_flush - flush matching STA entries from the STA table 701 * 702 * Returns the number of removed STA entries. 703 * 704 * @sdata: sdata to remove all stations from 705 * @vlans: if the given interface is an AP interface, also flush VLANs 706 */ 707 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 708 709 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 710 { 711 return __sta_info_flush(sdata, false); 712 } 713 714 void sta_set_rate_info_tx(struct sta_info *sta, 715 const struct ieee80211_tx_rate *rate, 716 struct rate_info *rinfo); 717 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 718 719 u32 sta_get_expected_throughput(struct sta_info *sta); 720 721 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 722 unsigned long exp_time); 723 u8 sta_info_tx_streams(struct sta_info *sta); 724 725 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 726 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 727 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 728 729 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 730 731 enum sta_stats_type { 732 STA_STATS_RATE_TYPE_INVALID = 0, 733 STA_STATS_RATE_TYPE_LEGACY, 734 STA_STATS_RATE_TYPE_HT, 735 STA_STATS_RATE_TYPE_VHT, 736 }; 737 738 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 739 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 740 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 741 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 742 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 743 #define STA_STATS_FIELD_BW GENMASK(11, 8) 744 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 745 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 746 747 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 748 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 749 750 #define STA_STATS_RATE_INVALID 0 751 752 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 753 { 754 u16 r; 755 756 r = STA_STATS_FIELD(BW, s->bw); 757 758 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 759 r |= STA_STATS_FIELD(SGI, 1); 760 761 switch (s->encoding) { 762 case RX_ENC_VHT: 763 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 764 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 765 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 766 break; 767 case RX_ENC_HT: 768 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 769 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 770 break; 771 case RX_ENC_LEGACY: 772 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 773 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 774 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 775 break; 776 default: 777 WARN_ON(1); 778 return STA_STATS_RATE_INVALID; 779 } 780 781 return r; 782 } 783 784 #endif /* STA_INFO_H */ 785