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 #define HT_AGG_STATE_START_CB 6 120 #define HT_AGG_STATE_STOP_CB 7 121 122 enum ieee80211_agg_stop_reason { 123 AGG_STOP_DECLINED, 124 AGG_STOP_LOCAL_REQUEST, 125 AGG_STOP_PEER_REQUEST, 126 AGG_STOP_DESTROY_STA, 127 }; 128 129 /** 130 * struct tid_ampdu_tx - TID aggregation information (Tx). 131 * 132 * @rcu_head: rcu head for freeing structure 133 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 134 * @addba_resp_timer: timer for peer's response to addba request 135 * @pending: pending frames queue -- use sta's spinlock to protect 136 * @dialog_token: dialog token for aggregation session 137 * @timeout: session timeout value to be filled in ADDBA requests 138 * @state: session state (see above) 139 * @last_tx: jiffies of last tx activity 140 * @stop_initiator: initiator of a session stop 141 * @tx_stop: TX DelBA frame when stopping 142 * @buf_size: reorder buffer size at receiver 143 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 144 * @bar_pending: BAR needs to be re-sent 145 * @amsdu: support A-MSDU withing A-MDPU 146 * 147 * This structure's lifetime is managed by RCU, assignments to 148 * the array holding it must hold the aggregation mutex. 149 * 150 * The TX path can access it under RCU lock-free if, and 151 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 152 * set. Otherwise, the TX path must also acquire the spinlock 153 * and re-check the state, see comments in the tx code 154 * touching it. 155 */ 156 struct tid_ampdu_tx { 157 struct rcu_head rcu_head; 158 struct timer_list session_timer; 159 struct timer_list addba_resp_timer; 160 struct sk_buff_head pending; 161 unsigned long state; 162 unsigned long last_tx; 163 u16 timeout; 164 u8 dialog_token; 165 u8 stop_initiator; 166 bool tx_stop; 167 u8 buf_size; 168 169 u16 failed_bar_ssn; 170 bool bar_pending; 171 bool amsdu; 172 }; 173 174 /** 175 * struct tid_ampdu_rx - TID aggregation information (Rx). 176 * 177 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 178 * A-MSDU with individually reported subframes. 179 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 180 * the reorder buffer that should be ignored when releasing frames 181 * @reorder_time: jiffies when skb was added 182 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 183 * @reorder_timer: releases expired frames from the reorder buffer. 184 * @last_rx: jiffies of last rx activity 185 * @head_seq_num: head sequence number in reordering buffer. 186 * @stored_mpdu_num: number of MPDUs in reordering buffer 187 * @ssn: Starting Sequence Number expected to be aggregated. 188 * @buf_size: buffer size for incoming A-MPDUs 189 * @timeout: reset timer value (in TUs). 190 * @rcu_head: RCU head used for freeing this struct 191 * @reorder_lock: serializes access to reorder buffer, see below. 192 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 193 * and ssn. 194 * @removed: this session is removed (but might have been found due to RCU) 195 * @started: this session has started (head ssn or higher was received) 196 * 197 * This structure's lifetime is managed by RCU, assignments to 198 * the array holding it must hold the aggregation mutex. 199 * 200 * The @reorder_lock is used to protect the members of this 201 * struct, except for @timeout, @buf_size and @dialog_token, 202 * which are constant across the lifetime of the struct (the 203 * dialog token being used only for debugging). 204 */ 205 struct tid_ampdu_rx { 206 struct rcu_head rcu_head; 207 spinlock_t reorder_lock; 208 u64 reorder_buf_filtered; 209 struct sk_buff_head *reorder_buf; 210 unsigned long *reorder_time; 211 struct timer_list session_timer; 212 struct timer_list reorder_timer; 213 unsigned long last_rx; 214 u16 head_seq_num; 215 u16 stored_mpdu_num; 216 u16 ssn; 217 u16 buf_size; 218 u16 timeout; 219 u8 auto_seq:1, 220 removed:1, 221 started:1; 222 }; 223 224 /** 225 * struct sta_ampdu_mlme - STA aggregation information. 226 * 227 * @mtx: mutex to protect all TX data (except non-NULL assignments 228 * to tid_tx[idx], which are protected by the sta spinlock) 229 * tid_start_tx is also protected by sta->lock. 230 * @tid_rx: aggregation info for Rx per TID -- RCU protected 231 * @tid_rx_token: dialog tokens for valid aggregation sessions 232 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 233 * RX timer expired until the work for it runs 234 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 235 * driver requested to close until the work for it runs 236 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested 237 * to be treated as started/stopped due to offloading 238 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 239 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 240 * unexpected aggregation related frames outside a session 241 * @work: work struct for starting/stopping aggregation 242 * @tid_tx: aggregation info for Tx per TID 243 * @tid_start_tx: sessions where start was requested 244 * @last_addba_req_time: timestamp of the last addBA request. 245 * @addba_req_num: number of times addBA request has been sent. 246 * @dialog_token_allocator: dialog token enumerator for each new session; 247 */ 248 struct sta_ampdu_mlme { 249 struct mutex mtx; 250 /* rx */ 251 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 252 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 253 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 254 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 255 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; 256 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 257 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 258 /* tx */ 259 struct work_struct work; 260 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 261 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 262 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 263 u8 addba_req_num[IEEE80211_NUM_TIDS]; 264 u8 dialog_token_allocator; 265 }; 266 267 268 /* Value to indicate no TID reservation */ 269 #define IEEE80211_TID_UNRESERVED 0xff 270 271 #define IEEE80211_FAST_XMIT_MAX_IV 18 272 273 /** 274 * struct ieee80211_fast_tx - TX fastpath information 275 * @key: key to use for hw crypto 276 * @hdr: the 802.11 header to put with the frame 277 * @hdr_len: actual 802.11 header length 278 * @sa_offs: offset of the SA 279 * @da_offs: offset of the DA 280 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 281 * @band: band this will be transmitted on, for tx_info 282 * @rcu_head: RCU head to free this struct 283 * 284 * This struct is small enough so that the common case (maximum crypto 285 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 286 * cache line. 287 */ 288 struct ieee80211_fast_tx { 289 struct ieee80211_key *key; 290 u8 hdr_len; 291 u8 sa_offs, da_offs, pn_offs; 292 u8 band; 293 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 294 sizeof(rfc1042_header)] __aligned(2); 295 296 struct rcu_head rcu_head; 297 }; 298 299 /** 300 * struct ieee80211_fast_rx - RX fastpath information 301 * @dev: netdevice for reporting the SKB 302 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 303 * @vif_addr: interface address 304 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 305 * @control_port_protocol: control port protocol copied from sdata 306 * @expected_ds_bits: from/to DS bits expected 307 * @icv_len: length of the MIC if present 308 * @key: bool indicating encryption is expected (key is set) 309 * @sta_notify: notify the MLME code (once) 310 * @internal_forward: forward froms internally on AP/VLAN type interfaces 311 * @uses_rss: copy of USES_RSS hw flag 312 * @da_offs: offset of the DA in the header (for header conversion) 313 * @sa_offs: offset of the SA in the header (for header conversion) 314 * @rcu_head: RCU head for freeing this structure 315 */ 316 struct ieee80211_fast_rx { 317 struct net_device *dev; 318 enum nl80211_iftype vif_type; 319 u8 vif_addr[ETH_ALEN] __aligned(2); 320 u8 rfc1042_hdr[6] __aligned(2); 321 __be16 control_port_protocol; 322 __le16 expected_ds_bits; 323 u8 icv_len; 324 u8 key:1, 325 sta_notify:1, 326 internal_forward:1, 327 uses_rss:1; 328 u8 da_offs, sa_offs; 329 330 struct rcu_head rcu_head; 331 }; 332 333 /* we use only values in the range 0-100, so pick a large precision */ 334 DECLARE_EWMA(mesh_fail_avg, 20, 8) 335 336 /** 337 * struct mesh_sta - mesh STA information 338 * @plink_lock: serialize access to plink fields 339 * @llid: Local link ID 340 * @plid: Peer link ID 341 * @aid: local aid supplied by peer 342 * @reason: Cancel reason on PLINK_HOLDING state 343 * @plink_retries: Retries in establishment 344 * @plink_state: peer link state 345 * @plink_timeout: timeout of peer link 346 * @plink_timer: peer link watch timer 347 * @plink_sta: peer link watch timer's sta_info 348 * @t_offset: timing offset relative to this host 349 * @t_offset_setpoint: reference timing offset of this sta to be used when 350 * calculating clockdrift 351 * @local_pm: local link-specific power save mode 352 * @peer_pm: peer-specific power save mode towards local STA 353 * @nonpeer_pm: STA power save mode towards non-peer neighbors 354 * @processed_beacon: set to true after peer rates and capabilities are 355 * processed 356 * @fail_avg: moving percentage of failed MSDUs 357 */ 358 struct mesh_sta { 359 struct timer_list plink_timer; 360 struct sta_info *plink_sta; 361 362 s64 t_offset; 363 s64 t_offset_setpoint; 364 365 spinlock_t plink_lock; 366 u16 llid; 367 u16 plid; 368 u16 aid; 369 u16 reason; 370 u8 plink_retries; 371 372 bool processed_beacon; 373 374 enum nl80211_plink_state plink_state; 375 u32 plink_timeout; 376 377 /* mesh power save */ 378 enum nl80211_mesh_power_mode local_pm; 379 enum nl80211_mesh_power_mode peer_pm; 380 enum nl80211_mesh_power_mode nonpeer_pm; 381 382 /* moving percentage of failed MSDUs */ 383 struct ewma_mesh_fail_avg fail_avg; 384 }; 385 386 DECLARE_EWMA(signal, 10, 8) 387 388 struct ieee80211_sta_rx_stats { 389 unsigned long packets; 390 unsigned long last_rx; 391 unsigned long num_duplicates; 392 unsigned long fragments; 393 unsigned long dropped; 394 int last_signal; 395 u8 chains; 396 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 397 u16 last_rate; 398 struct u64_stats_sync syncp; 399 u64 bytes; 400 u64 msdu[IEEE80211_NUM_TIDS + 1]; 401 }; 402 403 /* 404 * The bandwidth threshold below which the per-station CoDel parameters will be 405 * scaled to be more lenient (to prevent starvation of slow stations). This 406 * value will be scaled by the number of active stations when it is being 407 * applied. 408 */ 409 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ 410 411 /** 412 * struct sta_info - STA information 413 * 414 * This structure collects information about a station that 415 * mac80211 is communicating with. 416 * 417 * @list: global linked list entry 418 * @free_list: list entry for keeping track of stations to free 419 * @hash_node: hash node for rhashtable 420 * @addr: station's MAC address - duplicated from public part to 421 * let the hash table work with just a single cacheline 422 * @local: pointer to the global information 423 * @sdata: virtual interface this station belongs to 424 * @ptk: peer keys negotiated with this station, if any 425 * @ptk_idx: last installed peer key index 426 * @gtk: group keys negotiated with this station, if any 427 * @rate_ctrl: rate control algorithm reference 428 * @rate_ctrl_lock: spinlock used to protect rate control data 429 * (data inside the algorithm, so serializes calls there) 430 * @rate_ctrl_priv: rate control private per-STA pointer 431 * @lock: used for locking all fields that require locking, see comments 432 * in the header file. 433 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 434 * @listen_interval: listen interval of this station, when we're acting as AP 435 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 436 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 437 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 438 * when it leaves power saving state or polls 439 * @tx_filtered: buffers (per AC) of frames we already tried to 440 * transmit but were filtered by hardware due to STA having 441 * entered power saving state, these are also delivered to 442 * the station when it leaves powersave or polls for frames 443 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 444 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 445 * @last_connected: time (in seconds) when a station got connected 446 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 447 * plus one for non-QoS frames) 448 * @tid_seq: per-TID sequence numbers for sending to this STA 449 * @ampdu_mlme: A-MPDU state machine state 450 * @timer_to_tid: identity mapping to ID timers 451 * @mesh: mesh STA information 452 * @debugfs_dir: debug filesystem directory dentry 453 * @dead: set to true when sta is unlinked 454 * @removed: set to true when sta is being removed from sta_list 455 * @uploaded: set to true when sta is uploaded to the driver 456 * @sta: station information we share with the driver 457 * @sta_state: duplicates information about station state (for debug) 458 * @rcu_head: RCU head used for freeing this station struct 459 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 460 * taken from HT/VHT capabilities or VHT operating mode notification 461 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 462 * AP only. 463 * @cipher_scheme: optional cipher scheme for this station 464 * @cparams: CoDel parameters for this station. 465 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 466 * @fast_tx: TX fastpath information 467 * @fast_rx: RX fastpath information 468 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 469 * the BSS one. 470 * @tx_stats: TX statistics 471 * @rx_stats: RX statistics 472 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 473 * this (by advertising the USES_RSS hw flag) 474 * @status_stats: TX status statistics 475 */ 476 struct sta_info { 477 /* General information, mostly static */ 478 struct list_head list, free_list; 479 struct rcu_head rcu_head; 480 struct rhlist_head hash_node; 481 u8 addr[ETH_ALEN]; 482 struct ieee80211_local *local; 483 struct ieee80211_sub_if_data *sdata; 484 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 485 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 486 u8 ptk_idx; 487 struct rate_control_ref *rate_ctrl; 488 void *rate_ctrl_priv; 489 spinlock_t rate_ctrl_lock; 490 spinlock_t lock; 491 492 struct ieee80211_fast_tx __rcu *fast_tx; 493 struct ieee80211_fast_rx __rcu *fast_rx; 494 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 495 496 #ifdef CONFIG_MAC80211_MESH 497 struct mesh_sta *mesh; 498 #endif 499 500 struct work_struct drv_deliver_wk; 501 502 u16 listen_interval; 503 504 bool dead; 505 bool removed; 506 507 bool uploaded; 508 509 enum ieee80211_sta_state sta_state; 510 511 /* use the accessors defined below */ 512 unsigned long _flags; 513 514 /* STA powersave lock and frame queues */ 515 spinlock_t ps_lock; 516 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 517 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 518 unsigned long driver_buffered_tids; 519 unsigned long txq_buffered_tids; 520 521 long last_connected; 522 523 /* Updated from RX path only, no locking requirements */ 524 struct ieee80211_sta_rx_stats rx_stats; 525 struct { 526 struct ewma_signal signal; 527 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 528 } rx_stats_avg; 529 530 /* Plus 1 for non-QoS frames */ 531 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 532 533 /* Updated from TX status path only, no locking requirements */ 534 struct { 535 unsigned long filtered; 536 unsigned long retry_failed, retry_count; 537 unsigned int lost_packets; 538 unsigned long last_tdls_pkt_time; 539 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 540 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 541 unsigned long last_ack; 542 } status_stats; 543 544 /* Updated from TX path only, no locking requirements */ 545 struct { 546 u64 packets[IEEE80211_NUM_ACS]; 547 u64 bytes[IEEE80211_NUM_ACS]; 548 struct ieee80211_tx_rate last_rate; 549 u64 msdu[IEEE80211_NUM_TIDS + 1]; 550 } tx_stats; 551 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 552 553 /* 554 * Aggregation information, locked with lock. 555 */ 556 struct sta_ampdu_mlme ampdu_mlme; 557 u8 timer_to_tid[IEEE80211_NUM_TIDS]; 558 559 #ifdef CONFIG_MAC80211_DEBUGFS 560 struct dentry *debugfs_dir; 561 #endif 562 563 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 564 565 enum ieee80211_smps_mode known_smps_mode; 566 const struct ieee80211_cipher_scheme *cipher_scheme; 567 568 struct codel_params cparams; 569 570 u8 reserved_tid; 571 572 struct cfg80211_chan_def tdls_chandef; 573 574 /* keep last! */ 575 struct ieee80211_sta sta; 576 }; 577 578 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 579 { 580 #ifdef CONFIG_MAC80211_MESH 581 return sta->mesh->plink_state; 582 #endif 583 return NL80211_PLINK_LISTEN; 584 } 585 586 static inline void set_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 set_bit(flag, &sta->_flags); 593 } 594 595 static inline void clear_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 clear_bit(flag, &sta->_flags); 602 } 603 604 static inline int test_sta_flag(struct sta_info *sta, 605 enum ieee80211_sta_info_flags flag) 606 { 607 return test_bit(flag, &sta->_flags); 608 } 609 610 static inline int test_and_clear_sta_flag(struct sta_info *sta, 611 enum ieee80211_sta_info_flags flag) 612 { 613 WARN_ON(flag == WLAN_STA_AUTH || 614 flag == WLAN_STA_ASSOC || 615 flag == WLAN_STA_AUTHORIZED); 616 return test_and_clear_bit(flag, &sta->_flags); 617 } 618 619 static inline int test_and_set_sta_flag(struct sta_info *sta, 620 enum ieee80211_sta_info_flags flag) 621 { 622 WARN_ON(flag == WLAN_STA_AUTH || 623 flag == WLAN_STA_ASSOC || 624 flag == WLAN_STA_AUTHORIZED); 625 return test_and_set_bit(flag, &sta->_flags); 626 } 627 628 int sta_info_move_state(struct sta_info *sta, 629 enum ieee80211_sta_state new_state); 630 631 static inline void sta_info_pre_move_state(struct sta_info *sta, 632 enum ieee80211_sta_state new_state) 633 { 634 int ret; 635 636 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 637 638 ret = sta_info_move_state(sta, new_state); 639 WARN_ON_ONCE(ret); 640 } 641 642 643 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 644 struct tid_ampdu_tx *tid_tx); 645 646 static inline struct tid_ampdu_tx * 647 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 648 { 649 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 650 lockdep_is_held(&sta->lock) || 651 lockdep_is_held(&sta->ampdu_mlme.mtx)); 652 } 653 654 /* Maximum number of frames to buffer per power saving station per AC */ 655 #define STA_MAX_TX_BUFFER 64 656 657 /* Minimum buffered frame expiry time. If STA uses listen interval that is 658 * smaller than this value, the minimum value here is used instead. */ 659 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 660 661 /* How often station data is cleaned up (e.g., expiration of buffered frames) 662 */ 663 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 664 665 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 666 const u8 *addr); 667 668 /* 669 * Get a STA info, must be under RCU read lock. 670 */ 671 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 672 const u8 *addr); 673 674 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 675 const u8 *addr); 676 677 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 678 rhl_for_each_entry_rcu(_sta, _tmp, \ 679 sta_info_hash_lookup(local, _addr), hash_node) 680 681 /* 682 * Get STA info by index, BROKEN! 683 */ 684 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 685 int idx); 686 /* 687 * Create a new STA info, caller owns returned structure 688 * until sta_info_insert(). 689 */ 690 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 691 const u8 *addr, gfp_t gfp); 692 693 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 694 695 /* 696 * Insert STA info into hash table/list, returns zero or a 697 * -EEXIST if (if the same MAC address is already present). 698 * 699 * Calling the non-rcu version makes the caller relinquish, 700 * the _rcu version calls read_lock_rcu() and must be called 701 * without it held. 702 */ 703 int sta_info_insert(struct sta_info *sta); 704 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 705 706 int __must_check __sta_info_destroy(struct sta_info *sta); 707 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 708 const u8 *addr); 709 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 710 const u8 *addr); 711 712 void sta_info_recalc_tim(struct sta_info *sta); 713 714 int sta_info_init(struct ieee80211_local *local); 715 void sta_info_stop(struct ieee80211_local *local); 716 717 /** 718 * sta_info_flush - flush matching STA entries from the STA table 719 * 720 * Returns the number of removed STA entries. 721 * 722 * @sdata: sdata to remove all stations from 723 * @vlans: if the given interface is an AP interface, also flush VLANs 724 */ 725 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 726 727 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 728 { 729 return __sta_info_flush(sdata, false); 730 } 731 732 void sta_set_rate_info_tx(struct sta_info *sta, 733 const struct ieee80211_tx_rate *rate, 734 struct rate_info *rinfo); 735 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); 736 737 u32 sta_get_expected_throughput(struct sta_info *sta); 738 739 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 740 unsigned long exp_time); 741 u8 sta_info_tx_streams(struct sta_info *sta); 742 743 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 744 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 745 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 746 747 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 748 749 enum sta_stats_type { 750 STA_STATS_RATE_TYPE_INVALID = 0, 751 STA_STATS_RATE_TYPE_LEGACY, 752 STA_STATS_RATE_TYPE_HT, 753 STA_STATS_RATE_TYPE_VHT, 754 }; 755 756 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 757 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 758 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 759 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 760 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 761 #define STA_STATS_FIELD_BW GENMASK(11, 8) 762 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 763 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 764 765 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 766 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 767 768 #define STA_STATS_RATE_INVALID 0 769 770 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 771 { 772 u16 r; 773 774 r = STA_STATS_FIELD(BW, s->bw); 775 776 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 777 r |= STA_STATS_FIELD(SGI, 1); 778 779 switch (s->encoding) { 780 case RX_ENC_VHT: 781 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 782 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 783 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 784 break; 785 case RX_ENC_HT: 786 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 787 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 788 break; 789 case RX_ENC_LEGACY: 790 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 791 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 792 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 793 break; 794 default: 795 WARN_ON(1); 796 return STA_STATS_RATE_INVALID; 797 } 798 799 return r; 800 } 801 802 #endif /* STA_INFO_H */ 803