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 /* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */ 131 #define AIRTIME_USE_TX BIT(0) 132 #define AIRTIME_USE_RX BIT(1) 133 134 struct airtime_info { 135 u64 rx_airtime; 136 u64 tx_airtime; 137 s64 deficit; 138 }; 139 140 struct sta_info; 141 142 /** 143 * struct tid_ampdu_tx - TID aggregation information (Tx). 144 * 145 * @rcu_head: rcu head for freeing structure 146 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 147 * @addba_resp_timer: timer for peer's response to addba request 148 * @pending: pending frames queue -- use sta's spinlock to protect 149 * @sta: station we are attached to 150 * @dialog_token: dialog token for aggregation session 151 * @timeout: session timeout value to be filled in ADDBA requests 152 * @tid: TID number 153 * @state: session state (see above) 154 * @last_tx: jiffies of last tx activity 155 * @stop_initiator: initiator of a session stop 156 * @tx_stop: TX DelBA frame when stopping 157 * @buf_size: reorder buffer size at receiver 158 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 159 * @bar_pending: BAR needs to be re-sent 160 * @amsdu: support A-MSDU withing A-MDPU 161 * 162 * This structure's lifetime is managed by RCU, assignments to 163 * the array holding it must hold the aggregation mutex. 164 * 165 * The TX path can access it under RCU lock-free if, and 166 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 167 * set. Otherwise, the TX path must also acquire the spinlock 168 * and re-check the state, see comments in the tx code 169 * touching it. 170 */ 171 struct tid_ampdu_tx { 172 struct rcu_head rcu_head; 173 struct timer_list session_timer; 174 struct timer_list addba_resp_timer; 175 struct sk_buff_head pending; 176 struct sta_info *sta; 177 unsigned long state; 178 unsigned long last_tx; 179 u16 timeout; 180 u8 dialog_token; 181 u8 stop_initiator; 182 bool tx_stop; 183 u16 buf_size; 184 185 u16 failed_bar_ssn; 186 bool bar_pending; 187 bool amsdu; 188 u8 tid; 189 }; 190 191 /** 192 * struct tid_ampdu_rx - TID aggregation information (Rx). 193 * 194 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 195 * A-MSDU with individually reported subframes. 196 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 197 * the reorder buffer that should be ignored when releasing frames 198 * @reorder_time: jiffies when skb was added 199 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 200 * @reorder_timer: releases expired frames from the reorder buffer. 201 * @sta: station we are attached to 202 * @last_rx: jiffies of last rx activity 203 * @head_seq_num: head sequence number in reordering buffer. 204 * @stored_mpdu_num: number of MPDUs in reordering buffer 205 * @ssn: Starting Sequence Number expected to be aggregated. 206 * @buf_size: buffer size for incoming A-MPDUs 207 * @timeout: reset timer value (in TUs). 208 * @tid: TID number 209 * @rcu_head: RCU head used for freeing this struct 210 * @reorder_lock: serializes access to reorder buffer, see below. 211 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 212 * and ssn. 213 * @removed: this session is removed (but might have been found due to RCU) 214 * @started: this session has started (head ssn or higher was received) 215 * 216 * This structure's lifetime is managed by RCU, assignments to 217 * the array holding it must hold the aggregation mutex. 218 * 219 * The @reorder_lock is used to protect the members of this 220 * struct, except for @timeout, @buf_size and @dialog_token, 221 * which are constant across the lifetime of the struct (the 222 * dialog token being used only for debugging). 223 */ 224 struct tid_ampdu_rx { 225 struct rcu_head rcu_head; 226 spinlock_t reorder_lock; 227 u64 reorder_buf_filtered; 228 struct sk_buff_head *reorder_buf; 229 unsigned long *reorder_time; 230 struct sta_info *sta; 231 struct timer_list session_timer; 232 struct timer_list reorder_timer; 233 unsigned long last_rx; 234 u16 head_seq_num; 235 u16 stored_mpdu_num; 236 u16 ssn; 237 u16 buf_size; 238 u16 timeout; 239 u8 tid; 240 u8 auto_seq:1, 241 removed:1, 242 started:1; 243 }; 244 245 /** 246 * struct sta_ampdu_mlme - STA aggregation information. 247 * 248 * @mtx: mutex to protect all TX data (except non-NULL assignments 249 * to tid_tx[idx], which are protected by the sta spinlock) 250 * tid_start_tx is also protected by sta->lock. 251 * @tid_rx: aggregation info for Rx per TID -- RCU protected 252 * @tid_rx_token: dialog tokens for valid aggregation sessions 253 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 254 * RX timer expired until the work for it runs 255 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 256 * driver requested to close until the work for it runs 257 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested 258 * to be treated as started/stopped due to offloading 259 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 260 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 261 * unexpected aggregation related frames outside a session 262 * @work: work struct for starting/stopping aggregation 263 * @tid_tx: aggregation info for Tx per TID 264 * @tid_start_tx: sessions where start was requested 265 * @last_addba_req_time: timestamp of the last addBA request. 266 * @addba_req_num: number of times addBA request has been sent. 267 * @dialog_token_allocator: dialog token enumerator for each new session; 268 */ 269 struct sta_ampdu_mlme { 270 struct mutex mtx; 271 /* rx */ 272 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 273 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 274 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 275 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 276 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; 277 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 278 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 279 /* tx */ 280 struct work_struct work; 281 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 282 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 283 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 284 u8 addba_req_num[IEEE80211_NUM_TIDS]; 285 u8 dialog_token_allocator; 286 }; 287 288 289 /* Value to indicate no TID reservation */ 290 #define IEEE80211_TID_UNRESERVED 0xff 291 292 #define IEEE80211_FAST_XMIT_MAX_IV 18 293 294 /** 295 * struct ieee80211_fast_tx - TX fastpath information 296 * @key: key to use for hw crypto 297 * @hdr: the 802.11 header to put with the frame 298 * @hdr_len: actual 802.11 header length 299 * @sa_offs: offset of the SA 300 * @da_offs: offset of the DA 301 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 302 * @band: band this will be transmitted on, for tx_info 303 * @rcu_head: RCU head to free this struct 304 * 305 * This struct is small enough so that the common case (maximum crypto 306 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 307 * cache line. 308 */ 309 struct ieee80211_fast_tx { 310 struct ieee80211_key *key; 311 u8 hdr_len; 312 u8 sa_offs, da_offs, pn_offs; 313 u8 band; 314 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 315 sizeof(rfc1042_header)] __aligned(2); 316 317 struct rcu_head rcu_head; 318 }; 319 320 /** 321 * struct ieee80211_fast_rx - RX fastpath information 322 * @dev: netdevice for reporting the SKB 323 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 324 * @vif_addr: interface address 325 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 326 * @control_port_protocol: control port protocol copied from sdata 327 * @expected_ds_bits: from/to DS bits expected 328 * @icv_len: length of the MIC if present 329 * @key: bool indicating encryption is expected (key is set) 330 * @sta_notify: notify the MLME code (once) 331 * @internal_forward: forward froms internally on AP/VLAN type interfaces 332 * @uses_rss: copy of USES_RSS hw flag 333 * @da_offs: offset of the DA in the header (for header conversion) 334 * @sa_offs: offset of the SA in the header (for header conversion) 335 * @rcu_head: RCU head for freeing this structure 336 */ 337 struct ieee80211_fast_rx { 338 struct net_device *dev; 339 enum nl80211_iftype vif_type; 340 u8 vif_addr[ETH_ALEN] __aligned(2); 341 u8 rfc1042_hdr[6] __aligned(2); 342 __be16 control_port_protocol; 343 __le16 expected_ds_bits; 344 u8 icv_len; 345 u8 key:1, 346 sta_notify:1, 347 internal_forward:1, 348 uses_rss:1; 349 u8 da_offs, sa_offs; 350 351 struct rcu_head rcu_head; 352 }; 353 354 /* we use only values in the range 0-100, so pick a large precision */ 355 DECLARE_EWMA(mesh_fail_avg, 20, 8) 356 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16) 357 358 /** 359 * struct mesh_sta - mesh STA information 360 * @plink_lock: serialize access to plink fields 361 * @llid: Local link ID 362 * @plid: Peer link ID 363 * @aid: local aid supplied by peer 364 * @reason: Cancel reason on PLINK_HOLDING state 365 * @plink_retries: Retries in establishment 366 * @plink_state: peer link state 367 * @plink_timeout: timeout of peer link 368 * @plink_timer: peer link watch timer 369 * @plink_sta: peer link watch timer's sta_info 370 * @t_offset: timing offset relative to this host 371 * @t_offset_setpoint: reference timing offset of this sta to be used when 372 * calculating clockdrift 373 * @local_pm: local link-specific power save mode 374 * @peer_pm: peer-specific power save mode towards local STA 375 * @nonpeer_pm: STA power save mode towards non-peer neighbors 376 * @processed_beacon: set to true after peer rates and capabilities are 377 * processed 378 * @connected_to_gate: true if mesh STA has a path to a mesh gate 379 * @fail_avg: moving percentage of failed MSDUs 380 * @tx_rate_avg: moving average of tx bitrate 381 */ 382 struct mesh_sta { 383 struct timer_list plink_timer; 384 struct sta_info *plink_sta; 385 386 s64 t_offset; 387 s64 t_offset_setpoint; 388 389 spinlock_t plink_lock; 390 u16 llid; 391 u16 plid; 392 u16 aid; 393 u16 reason; 394 u8 plink_retries; 395 396 bool processed_beacon; 397 bool connected_to_gate; 398 399 enum nl80211_plink_state plink_state; 400 u32 plink_timeout; 401 402 /* mesh power save */ 403 enum nl80211_mesh_power_mode local_pm; 404 enum nl80211_mesh_power_mode peer_pm; 405 enum nl80211_mesh_power_mode nonpeer_pm; 406 407 /* moving percentage of failed MSDUs */ 408 struct ewma_mesh_fail_avg fail_avg; 409 /* moving average of tx bitrate */ 410 struct ewma_mesh_tx_rate_avg tx_rate_avg; 411 }; 412 413 DECLARE_EWMA(signal, 10, 8) 414 415 struct ieee80211_sta_rx_stats { 416 unsigned long packets; 417 unsigned long last_rx; 418 unsigned long num_duplicates; 419 unsigned long fragments; 420 unsigned long dropped; 421 int last_signal; 422 u8 chains; 423 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 424 u32 last_rate; 425 struct u64_stats_sync syncp; 426 u64 bytes; 427 u64 msdu[IEEE80211_NUM_TIDS + 1]; 428 }; 429 430 /* 431 * The bandwidth threshold below which the per-station CoDel parameters will be 432 * scaled to be more lenient (to prevent starvation of slow stations). This 433 * value will be scaled by the number of active stations when it is being 434 * applied. 435 */ 436 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ 437 438 /** 439 * struct sta_info - STA information 440 * 441 * This structure collects information about a station that 442 * mac80211 is communicating with. 443 * 444 * @list: global linked list entry 445 * @free_list: list entry for keeping track of stations to free 446 * @hash_node: hash node for rhashtable 447 * @addr: station's MAC address - duplicated from public part to 448 * let the hash table work with just a single cacheline 449 * @local: pointer to the global information 450 * @sdata: virtual interface this station belongs to 451 * @ptk: peer keys negotiated with this station, if any 452 * @ptk_idx: last installed peer key index 453 * @gtk: group keys negotiated with this station, if any 454 * @rate_ctrl: rate control algorithm reference 455 * @rate_ctrl_lock: spinlock used to protect rate control data 456 * (data inside the algorithm, so serializes calls there) 457 * @rate_ctrl_priv: rate control private per-STA pointer 458 * @lock: used for locking all fields that require locking, see comments 459 * in the header file. 460 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 461 * @listen_interval: listen interval of this station, when we're acting as AP 462 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 463 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 464 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 465 * when it leaves power saving state or polls 466 * @tx_filtered: buffers (per AC) of frames we already tried to 467 * transmit but were filtered by hardware due to STA having 468 * entered power saving state, these are also delivered to 469 * the station when it leaves powersave or polls for frames 470 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 471 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 472 * @last_connected: time (in seconds) when a station got connected 473 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 474 * plus one for non-QoS frames) 475 * @tid_seq: per-TID sequence numbers for sending to this STA 476 * @airtime: per-AC struct airtime_info describing airtime statistics for this 477 * station 478 * @airtime_weight: station weight for airtime fairness calculation purposes 479 * @ampdu_mlme: A-MPDU state machine state 480 * @mesh: mesh STA information 481 * @debugfs_dir: debug filesystem directory dentry 482 * @dead: set to true when sta is unlinked 483 * @removed: set to true when sta is being removed from sta_list 484 * @uploaded: set to true when sta is uploaded to the driver 485 * @sta: station information we share with the driver 486 * @sta_state: duplicates information about station state (for debug) 487 * @rcu_head: RCU head used for freeing this station struct 488 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 489 * taken from HT/VHT capabilities or VHT operating mode notification 490 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 491 * AP only. 492 * @cipher_scheme: optional cipher scheme for this station 493 * @cparams: CoDel parameters for this station. 494 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 495 * @fast_tx: TX fastpath information 496 * @fast_rx: RX fastpath information 497 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 498 * the BSS one. 499 * @tx_stats: TX statistics 500 * @tx_stats.packets: # of packets transmitted 501 * @tx_stats.bytes: # of bytes in all packets transmitted 502 * @tx_stats.last_rate: last TX rate 503 * @tx_stats.msdu: # of transmitted MSDUs per TID 504 * @rx_stats: RX statistics 505 * @rx_stats_avg: averaged RX statistics 506 * @rx_stats_avg.signal: averaged signal 507 * @rx_stats_avg.chain_signal: averaged per-chain signal 508 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 509 * this (by advertising the USES_RSS hw flag) 510 * @status_stats: TX status statistics 511 * @status_stats.filtered: # of filtered frames 512 * @status_stats.retry_failed: # of frames that failed after retry 513 * @status_stats.retry_count: # of retries attempted 514 * @status_stats.lost_packets: # of lost packets 515 * @status_stats.last_tdls_pkt_time: timestamp of last TDLS packet 516 * @status_stats.msdu_retries: # of MSDU retries 517 * @status_stats.msdu_failed: # of failed MSDUs 518 * @status_stats.last_ack: last ack timestamp (jiffies) 519 * @status_stats.last_ack_signal: last ACK signal 520 * @status_stats.ack_signal_filled: last ACK signal validity 521 * @status_stats.avg_ack_signal: average ACK signal 522 */ 523 struct sta_info { 524 /* General information, mostly static */ 525 struct list_head list, free_list; 526 struct rcu_head rcu_head; 527 struct rhlist_head hash_node; 528 u8 addr[ETH_ALEN]; 529 struct ieee80211_local *local; 530 struct ieee80211_sub_if_data *sdata; 531 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 532 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 533 u8 ptk_idx; 534 struct rate_control_ref *rate_ctrl; 535 void *rate_ctrl_priv; 536 spinlock_t rate_ctrl_lock; 537 spinlock_t lock; 538 539 struct ieee80211_fast_tx __rcu *fast_tx; 540 struct ieee80211_fast_rx __rcu *fast_rx; 541 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 542 543 #ifdef CONFIG_MAC80211_MESH 544 struct mesh_sta *mesh; 545 #endif 546 547 struct work_struct drv_deliver_wk; 548 549 u16 listen_interval; 550 551 bool dead; 552 bool removed; 553 554 bool uploaded; 555 556 enum ieee80211_sta_state sta_state; 557 558 /* use the accessors defined below */ 559 unsigned long _flags; 560 561 /* STA powersave lock and frame queues */ 562 spinlock_t ps_lock; 563 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 564 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 565 unsigned long driver_buffered_tids; 566 unsigned long txq_buffered_tids; 567 568 long last_connected; 569 570 /* Updated from RX path only, no locking requirements */ 571 struct ieee80211_sta_rx_stats rx_stats; 572 struct { 573 struct ewma_signal signal; 574 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 575 } rx_stats_avg; 576 577 /* Plus 1 for non-QoS frames */ 578 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 579 580 /* Updated from TX status path only, no locking requirements */ 581 struct { 582 unsigned long filtered; 583 unsigned long retry_failed, retry_count; 584 unsigned int lost_packets; 585 unsigned long last_tdls_pkt_time; 586 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 587 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 588 unsigned long last_ack; 589 s8 last_ack_signal; 590 bool ack_signal_filled; 591 struct ewma_avg_signal avg_ack_signal; 592 } status_stats; 593 594 /* Updated from TX path only, no locking requirements */ 595 struct { 596 u64 packets[IEEE80211_NUM_ACS]; 597 u64 bytes[IEEE80211_NUM_ACS]; 598 struct ieee80211_tx_rate last_rate; 599 u64 msdu[IEEE80211_NUM_TIDS + 1]; 600 } tx_stats; 601 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 602 603 struct airtime_info airtime[IEEE80211_NUM_ACS]; 604 u16 airtime_weight; 605 606 /* 607 * Aggregation information, locked with lock. 608 */ 609 struct sta_ampdu_mlme ampdu_mlme; 610 611 #ifdef CONFIG_MAC80211_DEBUGFS 612 struct dentry *debugfs_dir; 613 #endif 614 615 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 616 617 enum ieee80211_smps_mode known_smps_mode; 618 const struct ieee80211_cipher_scheme *cipher_scheme; 619 620 struct codel_params cparams; 621 622 u8 reserved_tid; 623 624 struct cfg80211_chan_def tdls_chandef; 625 626 /* keep last! */ 627 struct ieee80211_sta sta; 628 }; 629 630 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 631 { 632 #ifdef CONFIG_MAC80211_MESH 633 return sta->mesh->plink_state; 634 #endif 635 return NL80211_PLINK_LISTEN; 636 } 637 638 static inline void set_sta_flag(struct sta_info *sta, 639 enum ieee80211_sta_info_flags flag) 640 { 641 WARN_ON(flag == WLAN_STA_AUTH || 642 flag == WLAN_STA_ASSOC || 643 flag == WLAN_STA_AUTHORIZED); 644 set_bit(flag, &sta->_flags); 645 } 646 647 static inline void clear_sta_flag(struct sta_info *sta, 648 enum ieee80211_sta_info_flags flag) 649 { 650 WARN_ON(flag == WLAN_STA_AUTH || 651 flag == WLAN_STA_ASSOC || 652 flag == WLAN_STA_AUTHORIZED); 653 clear_bit(flag, &sta->_flags); 654 } 655 656 static inline int test_sta_flag(struct sta_info *sta, 657 enum ieee80211_sta_info_flags flag) 658 { 659 return test_bit(flag, &sta->_flags); 660 } 661 662 static inline int test_and_clear_sta_flag(struct sta_info *sta, 663 enum ieee80211_sta_info_flags flag) 664 { 665 WARN_ON(flag == WLAN_STA_AUTH || 666 flag == WLAN_STA_ASSOC || 667 flag == WLAN_STA_AUTHORIZED); 668 return test_and_clear_bit(flag, &sta->_flags); 669 } 670 671 static inline int test_and_set_sta_flag(struct sta_info *sta, 672 enum ieee80211_sta_info_flags flag) 673 { 674 WARN_ON(flag == WLAN_STA_AUTH || 675 flag == WLAN_STA_ASSOC || 676 flag == WLAN_STA_AUTHORIZED); 677 return test_and_set_bit(flag, &sta->_flags); 678 } 679 680 int sta_info_move_state(struct sta_info *sta, 681 enum ieee80211_sta_state new_state); 682 683 static inline void sta_info_pre_move_state(struct sta_info *sta, 684 enum ieee80211_sta_state new_state) 685 { 686 int ret; 687 688 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 689 690 ret = sta_info_move_state(sta, new_state); 691 WARN_ON_ONCE(ret); 692 } 693 694 695 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 696 struct tid_ampdu_tx *tid_tx); 697 698 static inline struct tid_ampdu_tx * 699 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 700 { 701 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 702 lockdep_is_held(&sta->lock) || 703 lockdep_is_held(&sta->ampdu_mlme.mtx)); 704 } 705 706 /* Maximum number of frames to buffer per power saving station per AC */ 707 #define STA_MAX_TX_BUFFER 64 708 709 /* Minimum buffered frame expiry time. If STA uses listen interval that is 710 * smaller than this value, the minimum value here is used instead. */ 711 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 712 713 /* How often station data is cleaned up (e.g., expiration of buffered frames) 714 */ 715 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 716 717 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 718 const u8 *addr); 719 720 /* 721 * Get a STA info, must be under RCU read lock. 722 */ 723 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 724 const u8 *addr); 725 726 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 727 const u8 *addr); 728 729 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 730 rhl_for_each_entry_rcu(_sta, _tmp, \ 731 sta_info_hash_lookup(local, _addr), hash_node) 732 733 /* 734 * Get STA info by index, BROKEN! 735 */ 736 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 737 int idx); 738 /* 739 * Create a new STA info, caller owns returned structure 740 * until sta_info_insert(). 741 */ 742 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 743 const u8 *addr, gfp_t gfp); 744 745 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 746 747 /* 748 * Insert STA info into hash table/list, returns zero or a 749 * -EEXIST if (if the same MAC address is already present). 750 * 751 * Calling the non-rcu version makes the caller relinquish, 752 * the _rcu version calls read_lock_rcu() and must be called 753 * without it held. 754 */ 755 int sta_info_insert(struct sta_info *sta); 756 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 757 758 int __must_check __sta_info_destroy(struct sta_info *sta); 759 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 760 const u8 *addr); 761 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 762 const u8 *addr); 763 764 void sta_info_recalc_tim(struct sta_info *sta); 765 766 int sta_info_init(struct ieee80211_local *local); 767 void sta_info_stop(struct ieee80211_local *local); 768 769 /** 770 * sta_info_flush - flush matching STA entries from the STA table 771 * 772 * Returns the number of removed STA entries. 773 * 774 * @sdata: sdata to remove all stations from 775 * @vlans: if the given interface is an AP interface, also flush VLANs 776 */ 777 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 778 779 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 780 { 781 return __sta_info_flush(sdata, false); 782 } 783 784 void sta_set_rate_info_tx(struct sta_info *sta, 785 const struct ieee80211_tx_rate *rate, 786 struct rate_info *rinfo); 787 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 788 bool tidstats); 789 790 u32 sta_get_expected_throughput(struct sta_info *sta); 791 792 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 793 unsigned long exp_time); 794 u8 sta_info_tx_streams(struct sta_info *sta); 795 796 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 797 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 798 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 799 800 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 801 802 enum sta_stats_type { 803 STA_STATS_RATE_TYPE_INVALID = 0, 804 STA_STATS_RATE_TYPE_LEGACY, 805 STA_STATS_RATE_TYPE_HT, 806 STA_STATS_RATE_TYPE_VHT, 807 STA_STATS_RATE_TYPE_HE, 808 }; 809 810 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 811 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 812 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 813 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 814 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 815 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0) 816 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4) 817 #define STA_STATS_FIELD_BW GENMASK(11, 8) 818 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 819 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 820 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16) 821 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19) 822 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21) 823 824 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 825 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 826 827 #define STA_STATS_RATE_INVALID 0 828 829 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 830 { 831 u32 r; 832 833 r = STA_STATS_FIELD(BW, s->bw); 834 835 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 836 r |= STA_STATS_FIELD(SGI, 1); 837 838 switch (s->encoding) { 839 case RX_ENC_VHT: 840 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 841 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 842 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 843 break; 844 case RX_ENC_HT: 845 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 846 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 847 break; 848 case RX_ENC_LEGACY: 849 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 850 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 851 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 852 break; 853 case RX_ENC_HE: 854 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE); 855 r |= STA_STATS_FIELD(HE_NSS, s->nss); 856 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx); 857 r |= STA_STATS_FIELD(HE_GI, s->he_gi); 858 r |= STA_STATS_FIELD(HE_RU, s->he_ru); 859 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm); 860 break; 861 default: 862 WARN_ON(1); 863 return STA_STATS_RATE_INVALID; 864 } 865 866 return r; 867 } 868 869 #endif /* STA_INFO_H */ 870