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 DECLARE_EWMA(avg_signal, 10, 8) 123 enum ieee80211_agg_stop_reason { 124 AGG_STOP_DECLINED, 125 AGG_STOP_LOCAL_REQUEST, 126 AGG_STOP_PEER_REQUEST, 127 AGG_STOP_DESTROY_STA, 128 }; 129 130 struct sta_info; 131 132 /** 133 * struct tid_ampdu_tx - TID aggregation information (Tx). 134 * 135 * @rcu_head: rcu head for freeing structure 136 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 137 * @addba_resp_timer: timer for peer's response to addba request 138 * @pending: pending frames queue -- use sta's spinlock to protect 139 * @sta: station we are attached to 140 * @dialog_token: dialog token for aggregation session 141 * @timeout: session timeout value to be filled in ADDBA requests 142 * @tid: TID number 143 * @state: session state (see above) 144 * @last_tx: jiffies of last tx activity 145 * @stop_initiator: initiator of a session stop 146 * @tx_stop: TX DelBA frame when stopping 147 * @buf_size: reorder buffer size at receiver 148 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 149 * @bar_pending: BAR needs to be re-sent 150 * @amsdu: support A-MSDU withing A-MDPU 151 * 152 * This structure's lifetime is managed by RCU, assignments to 153 * the array holding it must hold the aggregation mutex. 154 * 155 * The TX path can access it under RCU lock-free if, and 156 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 157 * set. Otherwise, the TX path must also acquire the spinlock 158 * and re-check the state, see comments in the tx code 159 * touching it. 160 */ 161 struct tid_ampdu_tx { 162 struct rcu_head rcu_head; 163 struct timer_list session_timer; 164 struct timer_list addba_resp_timer; 165 struct sk_buff_head pending; 166 struct sta_info *sta; 167 unsigned long state; 168 unsigned long last_tx; 169 u16 timeout; 170 u8 dialog_token; 171 u8 stop_initiator; 172 bool tx_stop; 173 u8 buf_size; 174 175 u16 failed_bar_ssn; 176 bool bar_pending; 177 bool amsdu; 178 u8 tid; 179 }; 180 181 /** 182 * struct tid_ampdu_rx - TID aggregation information (Rx). 183 * 184 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 185 * A-MSDU with individually reported subframes. 186 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 187 * the reorder buffer that should be ignored when releasing frames 188 * @reorder_time: jiffies when skb was added 189 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 190 * @reorder_timer: releases expired frames from the reorder buffer. 191 * @sta: station we are attached to 192 * @last_rx: jiffies of last rx activity 193 * @head_seq_num: head sequence number in reordering buffer. 194 * @stored_mpdu_num: number of MPDUs in reordering buffer 195 * @ssn: Starting Sequence Number expected to be aggregated. 196 * @buf_size: buffer size for incoming A-MPDUs 197 * @timeout: reset timer value (in TUs). 198 * @tid: TID number 199 * @rcu_head: RCU head used for freeing this struct 200 * @reorder_lock: serializes access to reorder buffer, see below. 201 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 202 * and ssn. 203 * @removed: this session is removed (but might have been found due to RCU) 204 * @started: this session has started (head ssn or higher was received) 205 * 206 * This structure's lifetime is managed by RCU, assignments to 207 * the array holding it must hold the aggregation mutex. 208 * 209 * The @reorder_lock is used to protect the members of this 210 * struct, except for @timeout, @buf_size and @dialog_token, 211 * which are constant across the lifetime of the struct (the 212 * dialog token being used only for debugging). 213 */ 214 struct tid_ampdu_rx { 215 struct rcu_head rcu_head; 216 spinlock_t reorder_lock; 217 u64 reorder_buf_filtered; 218 struct sk_buff_head *reorder_buf; 219 unsigned long *reorder_time; 220 struct sta_info *sta; 221 struct timer_list session_timer; 222 struct timer_list reorder_timer; 223 unsigned long last_rx; 224 u16 head_seq_num; 225 u16 stored_mpdu_num; 226 u16 ssn; 227 u16 buf_size; 228 u16 timeout; 229 u8 tid; 230 u8 auto_seq:1, 231 removed:1, 232 started:1; 233 }; 234 235 /** 236 * struct sta_ampdu_mlme - STA aggregation information. 237 * 238 * @mtx: mutex to protect all TX data (except non-NULL assignments 239 * to tid_tx[idx], which are protected by the sta spinlock) 240 * tid_start_tx is also protected by sta->lock. 241 * @tid_rx: aggregation info for Rx per TID -- RCU protected 242 * @tid_rx_token: dialog tokens for valid aggregation sessions 243 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 244 * RX timer expired until the work for it runs 245 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 246 * driver requested to close until the work for it runs 247 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested 248 * to be treated as started/stopped due to offloading 249 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 250 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 251 * unexpected aggregation related frames outside a session 252 * @work: work struct for starting/stopping aggregation 253 * @tid_tx: aggregation info for Tx per TID 254 * @tid_start_tx: sessions where start was requested 255 * @last_addba_req_time: timestamp of the last addBA request. 256 * @addba_req_num: number of times addBA request has been sent. 257 * @dialog_token_allocator: dialog token enumerator for each new session; 258 */ 259 struct sta_ampdu_mlme { 260 struct mutex mtx; 261 /* rx */ 262 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 263 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 264 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 265 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 266 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; 267 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 268 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 269 /* tx */ 270 struct work_struct work; 271 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 272 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 273 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 274 u8 addba_req_num[IEEE80211_NUM_TIDS]; 275 u8 dialog_token_allocator; 276 }; 277 278 279 /* Value to indicate no TID reservation */ 280 #define IEEE80211_TID_UNRESERVED 0xff 281 282 #define IEEE80211_FAST_XMIT_MAX_IV 18 283 284 /** 285 * struct ieee80211_fast_tx - TX fastpath information 286 * @key: key to use for hw crypto 287 * @hdr: the 802.11 header to put with the frame 288 * @hdr_len: actual 802.11 header length 289 * @sa_offs: offset of the SA 290 * @da_offs: offset of the DA 291 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 292 * @band: band this will be transmitted on, for tx_info 293 * @rcu_head: RCU head to free this struct 294 * 295 * This struct is small enough so that the common case (maximum crypto 296 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 297 * cache line. 298 */ 299 struct ieee80211_fast_tx { 300 struct ieee80211_key *key; 301 u8 hdr_len; 302 u8 sa_offs, da_offs, pn_offs; 303 u8 band; 304 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 305 sizeof(rfc1042_header)] __aligned(2); 306 307 struct rcu_head rcu_head; 308 }; 309 310 /** 311 * struct ieee80211_fast_rx - RX fastpath information 312 * @dev: netdevice for reporting the SKB 313 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 314 * @vif_addr: interface address 315 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 316 * @control_port_protocol: control port protocol copied from sdata 317 * @expected_ds_bits: from/to DS bits expected 318 * @icv_len: length of the MIC if present 319 * @key: bool indicating encryption is expected (key is set) 320 * @sta_notify: notify the MLME code (once) 321 * @internal_forward: forward froms internally on AP/VLAN type interfaces 322 * @uses_rss: copy of USES_RSS hw flag 323 * @da_offs: offset of the DA in the header (for header conversion) 324 * @sa_offs: offset of the SA in the header (for header conversion) 325 * @rcu_head: RCU head for freeing this structure 326 */ 327 struct ieee80211_fast_rx { 328 struct net_device *dev; 329 enum nl80211_iftype vif_type; 330 u8 vif_addr[ETH_ALEN] __aligned(2); 331 u8 rfc1042_hdr[6] __aligned(2); 332 __be16 control_port_protocol; 333 __le16 expected_ds_bits; 334 u8 icv_len; 335 u8 key:1, 336 sta_notify:1, 337 internal_forward:1, 338 uses_rss:1; 339 u8 da_offs, sa_offs; 340 341 struct rcu_head rcu_head; 342 }; 343 344 /* we use only values in the range 0-100, so pick a large precision */ 345 DECLARE_EWMA(mesh_fail_avg, 20, 8) 346 347 /** 348 * struct mesh_sta - mesh STA information 349 * @plink_lock: serialize access to plink fields 350 * @llid: Local link ID 351 * @plid: Peer link ID 352 * @aid: local aid supplied by peer 353 * @reason: Cancel reason on PLINK_HOLDING state 354 * @plink_retries: Retries in establishment 355 * @plink_state: peer link state 356 * @plink_timeout: timeout of peer link 357 * @plink_timer: peer link watch timer 358 * @plink_sta: peer link watch timer's sta_info 359 * @t_offset: timing offset relative to this host 360 * @t_offset_setpoint: reference timing offset of this sta to be used when 361 * calculating clockdrift 362 * @local_pm: local link-specific power save mode 363 * @peer_pm: peer-specific power save mode towards local STA 364 * @nonpeer_pm: STA power save mode towards non-peer neighbors 365 * @processed_beacon: set to true after peer rates and capabilities are 366 * processed 367 * @fail_avg: moving percentage of failed MSDUs 368 */ 369 struct mesh_sta { 370 struct timer_list plink_timer; 371 struct sta_info *plink_sta; 372 373 s64 t_offset; 374 s64 t_offset_setpoint; 375 376 spinlock_t plink_lock; 377 u16 llid; 378 u16 plid; 379 u16 aid; 380 u16 reason; 381 u8 plink_retries; 382 383 bool processed_beacon; 384 385 enum nl80211_plink_state plink_state; 386 u32 plink_timeout; 387 388 /* mesh power save */ 389 enum nl80211_mesh_power_mode local_pm; 390 enum nl80211_mesh_power_mode peer_pm; 391 enum nl80211_mesh_power_mode nonpeer_pm; 392 393 /* moving percentage of failed MSDUs */ 394 struct ewma_mesh_fail_avg fail_avg; 395 }; 396 397 DECLARE_EWMA(signal, 10, 8) 398 399 struct ieee80211_sta_rx_stats { 400 unsigned long packets; 401 unsigned long last_rx; 402 unsigned long num_duplicates; 403 unsigned long fragments; 404 unsigned long dropped; 405 int last_signal; 406 u8 chains; 407 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 408 u16 last_rate; 409 struct u64_stats_sync syncp; 410 u64 bytes; 411 u64 msdu[IEEE80211_NUM_TIDS + 1]; 412 }; 413 414 /* 415 * The bandwidth threshold below which the per-station CoDel parameters will be 416 * scaled to be more lenient (to prevent starvation of slow stations). This 417 * value will be scaled by the number of active stations when it is being 418 * applied. 419 */ 420 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ 421 422 /** 423 * struct sta_info - STA information 424 * 425 * This structure collects information about a station that 426 * mac80211 is communicating with. 427 * 428 * @list: global linked list entry 429 * @free_list: list entry for keeping track of stations to free 430 * @hash_node: hash node for rhashtable 431 * @addr: station's MAC address - duplicated from public part to 432 * let the hash table work with just a single cacheline 433 * @local: pointer to the global information 434 * @sdata: virtual interface this station belongs to 435 * @ptk: peer keys negotiated with this station, if any 436 * @ptk_idx: last installed peer key index 437 * @gtk: group keys negotiated with this station, if any 438 * @rate_ctrl: rate control algorithm reference 439 * @rate_ctrl_lock: spinlock used to protect rate control data 440 * (data inside the algorithm, so serializes calls there) 441 * @rate_ctrl_priv: rate control private per-STA pointer 442 * @lock: used for locking all fields that require locking, see comments 443 * in the header file. 444 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 445 * @listen_interval: listen interval of this station, when we're acting as AP 446 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 447 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 448 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 449 * when it leaves power saving state or polls 450 * @tx_filtered: buffers (per AC) of frames we already tried to 451 * transmit but were filtered by hardware due to STA having 452 * entered power saving state, these are also delivered to 453 * the station when it leaves powersave or polls for frames 454 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 455 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 456 * @last_connected: time (in seconds) when a station got connected 457 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 458 * plus one for non-QoS frames) 459 * @tid_seq: per-TID sequence numbers for sending to this STA 460 * @ampdu_mlme: A-MPDU state machine state 461 * @mesh: mesh STA information 462 * @debugfs_dir: debug filesystem directory dentry 463 * @dead: set to true when sta is unlinked 464 * @removed: set to true when sta is being removed from sta_list 465 * @uploaded: set to true when sta is uploaded to the driver 466 * @sta: station information we share with the driver 467 * @sta_state: duplicates information about station state (for debug) 468 * @rcu_head: RCU head used for freeing this station struct 469 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 470 * taken from HT/VHT capabilities or VHT operating mode notification 471 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 472 * AP only. 473 * @cipher_scheme: optional cipher scheme for this station 474 * @cparams: CoDel parameters for this station. 475 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 476 * @fast_tx: TX fastpath information 477 * @fast_rx: RX fastpath information 478 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 479 * the BSS one. 480 * @tx_stats: TX statistics 481 * @rx_stats: RX statistics 482 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 483 * this (by advertising the USES_RSS hw flag) 484 * @status_stats: TX status statistics 485 */ 486 struct sta_info { 487 /* General information, mostly static */ 488 struct list_head list, free_list; 489 struct rcu_head rcu_head; 490 struct rhlist_head hash_node; 491 u8 addr[ETH_ALEN]; 492 struct ieee80211_local *local; 493 struct ieee80211_sub_if_data *sdata; 494 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 495 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 496 u8 ptk_idx; 497 struct rate_control_ref *rate_ctrl; 498 void *rate_ctrl_priv; 499 spinlock_t rate_ctrl_lock; 500 spinlock_t lock; 501 502 struct ieee80211_fast_tx __rcu *fast_tx; 503 struct ieee80211_fast_rx __rcu *fast_rx; 504 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 505 506 #ifdef CONFIG_MAC80211_MESH 507 struct mesh_sta *mesh; 508 #endif 509 510 struct work_struct drv_deliver_wk; 511 512 u16 listen_interval; 513 514 bool dead; 515 bool removed; 516 517 bool uploaded; 518 519 enum ieee80211_sta_state sta_state; 520 521 /* use the accessors defined below */ 522 unsigned long _flags; 523 524 /* STA powersave lock and frame queues */ 525 spinlock_t ps_lock; 526 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 527 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 528 unsigned long driver_buffered_tids; 529 unsigned long txq_buffered_tids; 530 531 long last_connected; 532 533 /* Updated from RX path only, no locking requirements */ 534 struct ieee80211_sta_rx_stats rx_stats; 535 struct { 536 struct ewma_signal signal; 537 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 538 } rx_stats_avg; 539 540 /* Plus 1 for non-QoS frames */ 541 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 542 543 /* Updated from TX status path only, no locking requirements */ 544 struct { 545 unsigned long filtered; 546 unsigned long retry_failed, retry_count; 547 unsigned int lost_packets; 548 unsigned long last_tdls_pkt_time; 549 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 550 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 551 unsigned long last_ack; 552 s8 last_ack_signal; 553 bool ack_signal_filled; 554 struct ewma_avg_signal avg_ack_signal; 555 } status_stats; 556 557 /* Updated from TX path only, no locking requirements */ 558 struct { 559 u64 packets[IEEE80211_NUM_ACS]; 560 u64 bytes[IEEE80211_NUM_ACS]; 561 struct ieee80211_tx_rate last_rate; 562 u64 msdu[IEEE80211_NUM_TIDS + 1]; 563 } tx_stats; 564 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 565 566 /* 567 * Aggregation information, locked with lock. 568 */ 569 struct sta_ampdu_mlme ampdu_mlme; 570 571 #ifdef CONFIG_MAC80211_DEBUGFS 572 struct dentry *debugfs_dir; 573 #endif 574 575 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 576 577 enum ieee80211_smps_mode known_smps_mode; 578 const struct ieee80211_cipher_scheme *cipher_scheme; 579 580 struct codel_params cparams; 581 582 u8 reserved_tid; 583 584 struct cfg80211_chan_def tdls_chandef; 585 586 /* keep last! */ 587 struct ieee80211_sta sta; 588 }; 589 590 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 591 { 592 #ifdef CONFIG_MAC80211_MESH 593 return sta->mesh->plink_state; 594 #endif 595 return NL80211_PLINK_LISTEN; 596 } 597 598 static inline void set_sta_flag(struct sta_info *sta, 599 enum ieee80211_sta_info_flags flag) 600 { 601 WARN_ON(flag == WLAN_STA_AUTH || 602 flag == WLAN_STA_ASSOC || 603 flag == WLAN_STA_AUTHORIZED); 604 set_bit(flag, &sta->_flags); 605 } 606 607 static inline void clear_sta_flag(struct sta_info *sta, 608 enum ieee80211_sta_info_flags flag) 609 { 610 WARN_ON(flag == WLAN_STA_AUTH || 611 flag == WLAN_STA_ASSOC || 612 flag == WLAN_STA_AUTHORIZED); 613 clear_bit(flag, &sta->_flags); 614 } 615 616 static inline int test_sta_flag(struct sta_info *sta, 617 enum ieee80211_sta_info_flags flag) 618 { 619 return test_bit(flag, &sta->_flags); 620 } 621 622 static inline int test_and_clear_sta_flag(struct sta_info *sta, 623 enum ieee80211_sta_info_flags flag) 624 { 625 WARN_ON(flag == WLAN_STA_AUTH || 626 flag == WLAN_STA_ASSOC || 627 flag == WLAN_STA_AUTHORIZED); 628 return test_and_clear_bit(flag, &sta->_flags); 629 } 630 631 static inline int test_and_set_sta_flag(struct sta_info *sta, 632 enum ieee80211_sta_info_flags flag) 633 { 634 WARN_ON(flag == WLAN_STA_AUTH || 635 flag == WLAN_STA_ASSOC || 636 flag == WLAN_STA_AUTHORIZED); 637 return test_and_set_bit(flag, &sta->_flags); 638 } 639 640 int sta_info_move_state(struct sta_info *sta, 641 enum ieee80211_sta_state new_state); 642 643 static inline void sta_info_pre_move_state(struct sta_info *sta, 644 enum ieee80211_sta_state new_state) 645 { 646 int ret; 647 648 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 649 650 ret = sta_info_move_state(sta, new_state); 651 WARN_ON_ONCE(ret); 652 } 653 654 655 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 656 struct tid_ampdu_tx *tid_tx); 657 658 static inline struct tid_ampdu_tx * 659 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 660 { 661 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 662 lockdep_is_held(&sta->lock) || 663 lockdep_is_held(&sta->ampdu_mlme.mtx)); 664 } 665 666 /* Maximum number of frames to buffer per power saving station per AC */ 667 #define STA_MAX_TX_BUFFER 64 668 669 /* Minimum buffered frame expiry time. If STA uses listen interval that is 670 * smaller than this value, the minimum value here is used instead. */ 671 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 672 673 /* How often station data is cleaned up (e.g., expiration of buffered frames) 674 */ 675 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 676 677 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 678 const u8 *addr); 679 680 /* 681 * Get a STA info, must be under RCU read lock. 682 */ 683 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 684 const u8 *addr); 685 686 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 687 const u8 *addr); 688 689 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 690 rhl_for_each_entry_rcu(_sta, _tmp, \ 691 sta_info_hash_lookup(local, _addr), hash_node) 692 693 /* 694 * Get STA info by index, BROKEN! 695 */ 696 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 697 int idx); 698 /* 699 * Create a new STA info, caller owns returned structure 700 * until sta_info_insert(). 701 */ 702 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 703 const u8 *addr, gfp_t gfp); 704 705 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 706 707 /* 708 * Insert STA info into hash table/list, returns zero or a 709 * -EEXIST if (if the same MAC address is already present). 710 * 711 * Calling the non-rcu version makes the caller relinquish, 712 * the _rcu version calls read_lock_rcu() and must be called 713 * without it held. 714 */ 715 int sta_info_insert(struct sta_info *sta); 716 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 717 718 int __must_check __sta_info_destroy(struct sta_info *sta); 719 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 720 const u8 *addr); 721 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 722 const u8 *addr); 723 724 void sta_info_recalc_tim(struct sta_info *sta); 725 726 int sta_info_init(struct ieee80211_local *local); 727 void sta_info_stop(struct ieee80211_local *local); 728 729 /** 730 * sta_info_flush - flush matching STA entries from the STA table 731 * 732 * Returns the number of removed STA entries. 733 * 734 * @sdata: sdata to remove all stations from 735 * @vlans: if the given interface is an AP interface, also flush VLANs 736 */ 737 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 738 739 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 740 { 741 return __sta_info_flush(sdata, false); 742 } 743 744 void sta_set_rate_info_tx(struct sta_info *sta, 745 const struct ieee80211_tx_rate *rate, 746 struct rate_info *rinfo); 747 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 748 bool tidstats); 749 750 u32 sta_get_expected_throughput(struct sta_info *sta); 751 752 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 753 unsigned long exp_time); 754 u8 sta_info_tx_streams(struct sta_info *sta); 755 756 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 757 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 758 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 759 760 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 761 762 enum sta_stats_type { 763 STA_STATS_RATE_TYPE_INVALID = 0, 764 STA_STATS_RATE_TYPE_LEGACY, 765 STA_STATS_RATE_TYPE_HT, 766 STA_STATS_RATE_TYPE_VHT, 767 }; 768 769 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 770 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 771 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 772 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 773 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 774 #define STA_STATS_FIELD_BW GENMASK(11, 8) 775 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 776 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 777 778 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 779 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 780 781 #define STA_STATS_RATE_INVALID 0 782 783 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 784 { 785 u16 r; 786 787 r = STA_STATS_FIELD(BW, s->bw); 788 789 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 790 r |= STA_STATS_FIELD(SGI, 1); 791 792 switch (s->encoding) { 793 case RX_ENC_VHT: 794 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 795 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 796 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 797 break; 798 case RX_ENC_HT: 799 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 800 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 801 break; 802 case RX_ENC_LEGACY: 803 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 804 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 805 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 806 break; 807 default: 808 WARN_ON(1); 809 return STA_STATS_RATE_INVALID; 810 } 811 812 return r; 813 } 814 815 #endif /* STA_INFO_H */ 816