1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright 2002-2005, Devicescape Software, Inc. 4 * Copyright 2013-2014 Intel Mobile Communications GmbH 5 * Copyright(c) 2015-2017 Intel Deutschland GmbH 6 */ 7 8 #ifndef STA_INFO_H 9 #define STA_INFO_H 10 11 #include <linux/list.h> 12 #include <linux/types.h> 13 #include <linux/if_ether.h> 14 #include <linux/workqueue.h> 15 #include <linux/average.h> 16 #include <linux/bitfield.h> 17 #include <linux/etherdevice.h> 18 #include <linux/rhashtable.h> 19 #include <linux/u64_stats_sync.h> 20 #include "key.h" 21 22 /** 23 * enum ieee80211_sta_info_flags - Stations flags 24 * 25 * These flags are used with &struct sta_info's @flags member, but 26 * only indirectly with set_sta_flag() and friends. 27 * 28 * @WLAN_STA_AUTH: Station is authenticated. 29 * @WLAN_STA_ASSOC: Station is associated. 30 * @WLAN_STA_PS_STA: Station is in power-save mode 31 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 32 * This bit is always checked so needs to be enabled for all stations 33 * when virtual port control is not in use. 34 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 35 * frames. 36 * @WLAN_STA_WDS: Station is one of our WDS peers. 37 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 38 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 39 * frame to this station is transmitted. 40 * @WLAN_STA_MFP: Management frame protection is used with this STA. 41 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 42 * during suspend/resume and station removal. 43 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 44 * power-save mode logically to flush frames that might still 45 * be in the queues 46 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 47 * station in power-save mode, reply when the driver unblocks. 48 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 49 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 50 * packets. This means the link is enabled. 51 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 52 * station. 53 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 54 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 55 * TDLS peer 56 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on 57 * the BSS base channel. 58 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 59 * keeping station in power-save mode, reply when the driver 60 * unblocks the station. 61 * @WLAN_STA_SP: Station is in a service period, so don't try to 62 * reply to other uAPSD trigger frames or PS-Poll. 63 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 64 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 65 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 66 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 67 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 68 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 69 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 70 * until pending frames are delivered 71 * 72 * @NUM_WLAN_STA_FLAGS: number of defined flags 73 */ 74 enum ieee80211_sta_info_flags { 75 WLAN_STA_AUTH, 76 WLAN_STA_ASSOC, 77 WLAN_STA_PS_STA, 78 WLAN_STA_AUTHORIZED, 79 WLAN_STA_SHORT_PREAMBLE, 80 WLAN_STA_WDS, 81 WLAN_STA_CLEAR_PS_FILT, 82 WLAN_STA_MFP, 83 WLAN_STA_BLOCK_BA, 84 WLAN_STA_PS_DRIVER, 85 WLAN_STA_PSPOLL, 86 WLAN_STA_TDLS_PEER, 87 WLAN_STA_TDLS_PEER_AUTH, 88 WLAN_STA_TDLS_INITIATOR, 89 WLAN_STA_TDLS_CHAN_SWITCH, 90 WLAN_STA_TDLS_OFF_CHANNEL, 91 WLAN_STA_TDLS_WIDER_BW, 92 WLAN_STA_UAPSD, 93 WLAN_STA_SP, 94 WLAN_STA_4ADDR_EVENT, 95 WLAN_STA_INSERTED, 96 WLAN_STA_RATE_CONTROL, 97 WLAN_STA_TOFFSET_KNOWN, 98 WLAN_STA_MPSP_OWNER, 99 WLAN_STA_MPSP_RECIPIENT, 100 WLAN_STA_PS_DELIVER, 101 102 NUM_WLAN_STA_FLAGS, 103 }; 104 105 #define ADDBA_RESP_INTERVAL HZ 106 #define HT_AGG_MAX_RETRIES 15 107 #define HT_AGG_BURST_RETRIES 3 108 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 109 110 #define HT_AGG_STATE_DRV_READY 0 111 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 112 #define HT_AGG_STATE_OPERATIONAL 2 113 #define HT_AGG_STATE_STOPPING 3 114 #define HT_AGG_STATE_WANT_START 4 115 #define HT_AGG_STATE_WANT_STOP 5 116 #define HT_AGG_STATE_START_CB 6 117 #define HT_AGG_STATE_STOP_CB 7 118 119 DECLARE_EWMA(avg_signal, 10, 8) 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 /* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */ 128 #define AIRTIME_USE_TX BIT(0) 129 #define AIRTIME_USE_RX BIT(1) 130 131 struct airtime_info { 132 u64 rx_airtime; 133 u64 tx_airtime; 134 s64 deficit; 135 atomic_t aql_tx_pending; /* Estimated airtime for frames pending */ 136 u32 aql_limit_low; 137 u32 aql_limit_high; 138 }; 139 140 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, 141 struct sta_info *sta, u8 ac, 142 u16 tx_airtime, bool tx_completed); 143 144 struct sta_info; 145 146 /** 147 * struct tid_ampdu_tx - TID aggregation information (Tx). 148 * 149 * @rcu_head: rcu head for freeing structure 150 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 151 * @addba_resp_timer: timer for peer's response to addba request 152 * @pending: pending frames queue -- use sta's spinlock to protect 153 * @sta: station we are attached to 154 * @dialog_token: dialog token for aggregation session 155 * @timeout: session timeout value to be filled in ADDBA requests 156 * @tid: TID number 157 * @state: session state (see above) 158 * @last_tx: jiffies of last tx activity 159 * @stop_initiator: initiator of a session stop 160 * @tx_stop: TX DelBA frame when stopping 161 * @buf_size: reorder buffer size at receiver 162 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 163 * @bar_pending: BAR needs to be re-sent 164 * @amsdu: support A-MSDU withing A-MDPU 165 * 166 * This structure's lifetime is managed by RCU, assignments to 167 * the array holding it must hold the aggregation mutex. 168 * 169 * The TX path can access it under RCU lock-free if, and 170 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 171 * set. Otherwise, the TX path must also acquire the spinlock 172 * and re-check the state, see comments in the tx code 173 * touching it. 174 */ 175 struct tid_ampdu_tx { 176 struct rcu_head rcu_head; 177 struct timer_list session_timer; 178 struct timer_list addba_resp_timer; 179 struct sk_buff_head pending; 180 struct sta_info *sta; 181 unsigned long state; 182 unsigned long last_tx; 183 u16 timeout; 184 u8 dialog_token; 185 u8 stop_initiator; 186 bool tx_stop; 187 u16 buf_size; 188 189 u16 failed_bar_ssn; 190 bool bar_pending; 191 bool amsdu; 192 u8 tid; 193 }; 194 195 /** 196 * struct tid_ampdu_rx - TID aggregation information (Rx). 197 * 198 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 199 * A-MSDU with individually reported subframes. 200 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 201 * the reorder buffer that should be ignored when releasing frames 202 * @reorder_time: jiffies when skb was added 203 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 204 * @reorder_timer: releases expired frames from the reorder buffer. 205 * @sta: station we are attached to 206 * @last_rx: jiffies of last rx activity 207 * @head_seq_num: head sequence number in reordering buffer. 208 * @stored_mpdu_num: number of MPDUs in reordering buffer 209 * @ssn: Starting Sequence Number expected to be aggregated. 210 * @buf_size: buffer size for incoming A-MPDUs 211 * @timeout: reset timer value (in TUs). 212 * @tid: TID number 213 * @rcu_head: RCU head used for freeing this struct 214 * @reorder_lock: serializes access to reorder buffer, see below. 215 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 216 * and ssn. 217 * @removed: this session is removed (but might have been found due to RCU) 218 * @started: this session has started (head ssn or higher was received) 219 * 220 * This structure's lifetime is managed by RCU, assignments to 221 * the array holding it must hold the aggregation mutex. 222 * 223 * The @reorder_lock is used to protect the members of this 224 * struct, except for @timeout, @buf_size and @dialog_token, 225 * which are constant across the lifetime of the struct (the 226 * dialog token being used only for debugging). 227 */ 228 struct tid_ampdu_rx { 229 struct rcu_head rcu_head; 230 spinlock_t reorder_lock; 231 u64 reorder_buf_filtered; 232 struct sk_buff_head *reorder_buf; 233 unsigned long *reorder_time; 234 struct sta_info *sta; 235 struct timer_list session_timer; 236 struct timer_list reorder_timer; 237 unsigned long last_rx; 238 u16 head_seq_num; 239 u16 stored_mpdu_num; 240 u16 ssn; 241 u16 buf_size; 242 u16 timeout; 243 u8 tid; 244 u8 auto_seq:1, 245 removed:1, 246 started:1; 247 }; 248 249 /** 250 * struct sta_ampdu_mlme - STA aggregation information. 251 * 252 * @mtx: mutex to protect all TX data (except non-NULL assignments 253 * to tid_tx[idx], which are protected by the sta spinlock) 254 * tid_start_tx is also protected by sta->lock. 255 * @tid_rx: aggregation info for Rx per TID -- RCU protected 256 * @tid_rx_token: dialog tokens for valid aggregation sessions 257 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 258 * RX timer expired until the work for it runs 259 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 260 * driver requested to close until the work for it runs 261 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested 262 * to be treated as started/stopped due to offloading 263 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 264 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 265 * unexpected aggregation related frames outside a session 266 * @work: work struct for starting/stopping aggregation 267 * @tid_tx: aggregation info for Tx per TID 268 * @tid_start_tx: sessions where start was requested 269 * @last_addba_req_time: timestamp of the last addBA request. 270 * @addba_req_num: number of times addBA request has been sent. 271 * @dialog_token_allocator: dialog token enumerator for each new session; 272 */ 273 struct sta_ampdu_mlme { 274 struct mutex mtx; 275 /* rx */ 276 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 277 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 278 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 279 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 280 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; 281 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 282 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 283 /* tx */ 284 struct work_struct work; 285 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 286 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 287 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 288 u8 addba_req_num[IEEE80211_NUM_TIDS]; 289 u8 dialog_token_allocator; 290 }; 291 292 293 /* Value to indicate no TID reservation */ 294 #define IEEE80211_TID_UNRESERVED 0xff 295 296 #define IEEE80211_FAST_XMIT_MAX_IV 18 297 298 /** 299 * struct ieee80211_fast_tx - TX fastpath information 300 * @key: key to use for hw crypto 301 * @hdr: the 802.11 header to put with the frame 302 * @hdr_len: actual 802.11 header length 303 * @sa_offs: offset of the SA 304 * @da_offs: offset of the DA 305 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 306 * @band: band this will be transmitted on, for tx_info 307 * @rcu_head: RCU head to free this struct 308 * 309 * This struct is small enough so that the common case (maximum crypto 310 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 311 * cache line. 312 */ 313 struct ieee80211_fast_tx { 314 struct ieee80211_key *key; 315 u8 hdr_len; 316 u8 sa_offs, da_offs, pn_offs; 317 u8 band; 318 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 319 sizeof(rfc1042_header)] __aligned(2); 320 321 struct rcu_head rcu_head; 322 }; 323 324 /** 325 * struct ieee80211_fast_rx - RX fastpath information 326 * @dev: netdevice for reporting the SKB 327 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 328 * @vif_addr: interface address 329 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 330 * @control_port_protocol: control port protocol copied from sdata 331 * @expected_ds_bits: from/to DS bits expected 332 * @icv_len: length of the MIC if present 333 * @key: bool indicating encryption is expected (key is set) 334 * @sta_notify: notify the MLME code (once) 335 * @internal_forward: forward froms internally on AP/VLAN type interfaces 336 * @uses_rss: copy of USES_RSS hw flag 337 * @da_offs: offset of the DA in the header (for header conversion) 338 * @sa_offs: offset of the SA in the header (for header conversion) 339 * @rcu_head: RCU head for freeing this structure 340 */ 341 struct ieee80211_fast_rx { 342 struct net_device *dev; 343 enum nl80211_iftype vif_type; 344 u8 vif_addr[ETH_ALEN] __aligned(2); 345 u8 rfc1042_hdr[6] __aligned(2); 346 __be16 control_port_protocol; 347 __le16 expected_ds_bits; 348 u8 icv_len; 349 u8 key:1, 350 sta_notify:1, 351 internal_forward:1, 352 uses_rss:1; 353 u8 da_offs, sa_offs; 354 355 struct rcu_head rcu_head; 356 }; 357 358 /* we use only values in the range 0-100, so pick a large precision */ 359 DECLARE_EWMA(mesh_fail_avg, 20, 8) 360 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16) 361 362 /** 363 * struct mesh_sta - mesh STA information 364 * @plink_lock: serialize access to plink fields 365 * @llid: Local link ID 366 * @plid: Peer link ID 367 * @aid: local aid supplied by peer 368 * @reason: Cancel reason on PLINK_HOLDING state 369 * @plink_retries: Retries in establishment 370 * @plink_state: peer link state 371 * @plink_timeout: timeout of peer link 372 * @plink_timer: peer link watch timer 373 * @plink_sta: peer link watch timer's sta_info 374 * @t_offset: timing offset relative to this host 375 * @t_offset_setpoint: reference timing offset of this sta to be used when 376 * calculating clockdrift 377 * @local_pm: local link-specific power save mode 378 * @peer_pm: peer-specific power save mode towards local STA 379 * @nonpeer_pm: STA power save mode towards non-peer neighbors 380 * @processed_beacon: set to true after peer rates and capabilities are 381 * processed 382 * @connected_to_gate: true if mesh STA has a path to a mesh gate 383 * @fail_avg: moving percentage of failed MSDUs 384 * @tx_rate_avg: moving average of tx bitrate 385 */ 386 struct mesh_sta { 387 struct timer_list plink_timer; 388 struct sta_info *plink_sta; 389 390 s64 t_offset; 391 s64 t_offset_setpoint; 392 393 spinlock_t plink_lock; 394 u16 llid; 395 u16 plid; 396 u16 aid; 397 u16 reason; 398 u8 plink_retries; 399 400 bool processed_beacon; 401 bool connected_to_gate; 402 403 enum nl80211_plink_state plink_state; 404 u32 plink_timeout; 405 406 /* mesh power save */ 407 enum nl80211_mesh_power_mode local_pm; 408 enum nl80211_mesh_power_mode peer_pm; 409 enum nl80211_mesh_power_mode nonpeer_pm; 410 411 /* moving percentage of failed MSDUs */ 412 struct ewma_mesh_fail_avg fail_avg; 413 /* moving average of tx bitrate */ 414 struct ewma_mesh_tx_rate_avg tx_rate_avg; 415 }; 416 417 DECLARE_EWMA(signal, 10, 8) 418 419 struct ieee80211_sta_rx_stats { 420 unsigned long packets; 421 unsigned long last_rx; 422 unsigned long num_duplicates; 423 unsigned long fragments; 424 unsigned long dropped; 425 int last_signal; 426 u8 chains; 427 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 428 u32 last_rate; 429 struct u64_stats_sync syncp; 430 u64 bytes; 431 u64 msdu[IEEE80211_NUM_TIDS + 1]; 432 }; 433 434 /* 435 * The bandwidth threshold below which the per-station CoDel parameters will be 436 * scaled to be more lenient (to prevent starvation of slow stations). This 437 * value will be scaled by the number of active stations when it is being 438 * applied. 439 */ 440 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ 441 442 /** 443 * struct sta_info - STA information 444 * 445 * This structure collects information about a station that 446 * mac80211 is communicating with. 447 * 448 * @list: global linked list entry 449 * @free_list: list entry for keeping track of stations to free 450 * @hash_node: hash node for rhashtable 451 * @addr: station's MAC address - duplicated from public part to 452 * let the hash table work with just a single cacheline 453 * @local: pointer to the global information 454 * @sdata: virtual interface this station belongs to 455 * @ptk: peer keys negotiated with this station, if any 456 * @ptk_idx: last installed peer key index 457 * @gtk: group keys negotiated with this station, if any 458 * @rate_ctrl: rate control algorithm reference 459 * @rate_ctrl_lock: spinlock used to protect rate control data 460 * (data inside the algorithm, so serializes calls there) 461 * @rate_ctrl_priv: rate control private per-STA pointer 462 * @lock: used for locking all fields that require locking, see comments 463 * in the header file. 464 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 465 * @listen_interval: listen interval of this station, when we're acting as AP 466 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 467 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 468 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 469 * when it leaves power saving state or polls 470 * @tx_filtered: buffers (per AC) of frames we already tried to 471 * transmit but were filtered by hardware due to STA having 472 * entered power saving state, these are also delivered to 473 * the station when it leaves powersave or polls for frames 474 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 475 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 476 * @assoc_at: clock boottime (in ns) of last association 477 * @last_connected: time (in seconds) when a station got connected 478 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 479 * plus one for non-QoS frames) 480 * @tid_seq: per-TID sequence numbers for sending to this STA 481 * @airtime: per-AC struct airtime_info describing airtime statistics for this 482 * station 483 * @airtime_weight: station weight for airtime fairness calculation purposes 484 * @ampdu_mlme: A-MPDU state machine state 485 * @mesh: mesh STA information 486 * @debugfs_dir: debug filesystem directory dentry 487 * @dead: set to true when sta is unlinked 488 * @removed: set to true when sta is being removed from sta_list 489 * @uploaded: set to true when sta is uploaded to the driver 490 * @sta: station information we share with the driver 491 * @sta_state: duplicates information about station state (for debug) 492 * @rcu_head: RCU head used for freeing this station struct 493 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 494 * taken from HT/VHT capabilities or VHT operating mode notification 495 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 496 * AP only. 497 * @cipher_scheme: optional cipher scheme for this station 498 * @cparams: CoDel parameters for this station. 499 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 500 * @fast_tx: TX fastpath information 501 * @fast_rx: RX fastpath information 502 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 503 * the BSS one. 504 * @tx_stats: TX statistics 505 * @tx_stats.packets: # of packets transmitted 506 * @tx_stats.bytes: # of bytes in all packets transmitted 507 * @tx_stats.last_rate: last TX rate 508 * @tx_stats.msdu: # of transmitted MSDUs per TID 509 * @rx_stats: RX statistics 510 * @rx_stats_avg: averaged RX statistics 511 * @rx_stats_avg.signal: averaged signal 512 * @rx_stats_avg.chain_signal: averaged per-chain signal 513 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 514 * this (by advertising the USES_RSS hw flag) 515 * @status_stats: TX status statistics 516 * @status_stats.filtered: # of filtered frames 517 * @status_stats.retry_failed: # of frames that failed after retry 518 * @status_stats.retry_count: # of retries attempted 519 * @status_stats.lost_packets: # of lost packets 520 * @status_stats.last_tdls_pkt_time: timestamp of last TDLS packet 521 * @status_stats.msdu_retries: # of MSDU retries 522 * @status_stats.msdu_failed: # of failed MSDUs 523 * @status_stats.last_ack: last ack timestamp (jiffies) 524 * @status_stats.last_ack_signal: last ACK signal 525 * @status_stats.ack_signal_filled: last ACK signal validity 526 * @status_stats.avg_ack_signal: average ACK signal 527 */ 528 struct sta_info { 529 /* General information, mostly static */ 530 struct list_head list, free_list; 531 struct rcu_head rcu_head; 532 struct rhlist_head hash_node; 533 u8 addr[ETH_ALEN]; 534 struct ieee80211_local *local; 535 struct ieee80211_sub_if_data *sdata; 536 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + 537 NUM_DEFAULT_MGMT_KEYS + 538 NUM_DEFAULT_BEACON_KEYS]; 539 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 540 u8 ptk_idx; 541 struct rate_control_ref *rate_ctrl; 542 void *rate_ctrl_priv; 543 spinlock_t rate_ctrl_lock; 544 spinlock_t lock; 545 546 struct ieee80211_fast_tx __rcu *fast_tx; 547 struct ieee80211_fast_rx __rcu *fast_rx; 548 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 549 550 #ifdef CONFIG_MAC80211_MESH 551 struct mesh_sta *mesh; 552 #endif 553 554 struct work_struct drv_deliver_wk; 555 556 u16 listen_interval; 557 558 bool dead; 559 bool removed; 560 561 bool uploaded; 562 563 enum ieee80211_sta_state sta_state; 564 565 /* use the accessors defined below */ 566 unsigned long _flags; 567 568 /* STA powersave lock and frame queues */ 569 spinlock_t ps_lock; 570 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 571 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 572 unsigned long driver_buffered_tids; 573 unsigned long txq_buffered_tids; 574 575 u64 assoc_at; 576 long last_connected; 577 578 /* Updated from RX path only, no locking requirements */ 579 struct ieee80211_sta_rx_stats rx_stats; 580 struct { 581 struct ewma_signal signal; 582 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 583 } rx_stats_avg; 584 585 /* Plus 1 for non-QoS frames */ 586 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 587 588 /* Updated from TX status path only, no locking requirements */ 589 struct { 590 unsigned long filtered; 591 unsigned long retry_failed, retry_count; 592 unsigned int lost_packets; 593 unsigned long last_tdls_pkt_time; 594 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 595 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 596 unsigned long last_ack; 597 s8 last_ack_signal; 598 bool ack_signal_filled; 599 struct ewma_avg_signal avg_ack_signal; 600 } status_stats; 601 602 /* Updated from TX path only, no locking requirements */ 603 struct { 604 u64 packets[IEEE80211_NUM_ACS]; 605 u64 bytes[IEEE80211_NUM_ACS]; 606 struct ieee80211_tx_rate last_rate; 607 u64 msdu[IEEE80211_NUM_TIDS + 1]; 608 } tx_stats; 609 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 610 611 struct airtime_info airtime[IEEE80211_NUM_ACS]; 612 u16 airtime_weight; 613 614 /* 615 * Aggregation information, locked with lock. 616 */ 617 struct sta_ampdu_mlme ampdu_mlme; 618 619 #ifdef CONFIG_MAC80211_DEBUGFS 620 struct dentry *debugfs_dir; 621 #endif 622 623 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 624 625 enum ieee80211_smps_mode known_smps_mode; 626 const struct ieee80211_cipher_scheme *cipher_scheme; 627 628 struct codel_params cparams; 629 630 u8 reserved_tid; 631 632 struct cfg80211_chan_def tdls_chandef; 633 634 /* keep last! */ 635 struct ieee80211_sta sta; 636 }; 637 638 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 639 { 640 #ifdef CONFIG_MAC80211_MESH 641 return sta->mesh->plink_state; 642 #endif 643 return NL80211_PLINK_LISTEN; 644 } 645 646 static inline void set_sta_flag(struct sta_info *sta, 647 enum ieee80211_sta_info_flags flag) 648 { 649 WARN_ON(flag == WLAN_STA_AUTH || 650 flag == WLAN_STA_ASSOC || 651 flag == WLAN_STA_AUTHORIZED); 652 set_bit(flag, &sta->_flags); 653 } 654 655 static inline void clear_sta_flag(struct sta_info *sta, 656 enum ieee80211_sta_info_flags flag) 657 { 658 WARN_ON(flag == WLAN_STA_AUTH || 659 flag == WLAN_STA_ASSOC || 660 flag == WLAN_STA_AUTHORIZED); 661 clear_bit(flag, &sta->_flags); 662 } 663 664 static inline int test_sta_flag(struct sta_info *sta, 665 enum ieee80211_sta_info_flags flag) 666 { 667 return test_bit(flag, &sta->_flags); 668 } 669 670 static inline int test_and_clear_sta_flag(struct sta_info *sta, 671 enum ieee80211_sta_info_flags flag) 672 { 673 WARN_ON(flag == WLAN_STA_AUTH || 674 flag == WLAN_STA_ASSOC || 675 flag == WLAN_STA_AUTHORIZED); 676 return test_and_clear_bit(flag, &sta->_flags); 677 } 678 679 static inline int test_and_set_sta_flag(struct sta_info *sta, 680 enum ieee80211_sta_info_flags flag) 681 { 682 WARN_ON(flag == WLAN_STA_AUTH || 683 flag == WLAN_STA_ASSOC || 684 flag == WLAN_STA_AUTHORIZED); 685 return test_and_set_bit(flag, &sta->_flags); 686 } 687 688 int sta_info_move_state(struct sta_info *sta, 689 enum ieee80211_sta_state new_state); 690 691 static inline void sta_info_pre_move_state(struct sta_info *sta, 692 enum ieee80211_sta_state new_state) 693 { 694 int ret; 695 696 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 697 698 ret = sta_info_move_state(sta, new_state); 699 WARN_ON_ONCE(ret); 700 } 701 702 703 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 704 struct tid_ampdu_tx *tid_tx); 705 706 static inline struct tid_ampdu_tx * 707 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 708 { 709 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 710 lockdep_is_held(&sta->lock) || 711 lockdep_is_held(&sta->ampdu_mlme.mtx)); 712 } 713 714 /* Maximum number of frames to buffer per power saving station per AC */ 715 #define STA_MAX_TX_BUFFER 64 716 717 /* Minimum buffered frame expiry time. If STA uses listen interval that is 718 * smaller than this value, the minimum value here is used instead. */ 719 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 720 721 /* How often station data is cleaned up (e.g., expiration of buffered frames) 722 */ 723 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 724 725 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 726 const u8 *addr); 727 728 /* 729 * Get a STA info, must be under RCU read lock. 730 */ 731 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 732 const u8 *addr); 733 734 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 735 const u8 *addr); 736 737 /* user must hold sta_mtx or be in RCU critical section */ 738 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local, 739 const u8 *sta_addr, const u8 *vif_addr); 740 741 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 742 rhl_for_each_entry_rcu(_sta, _tmp, \ 743 sta_info_hash_lookup(local, _addr), hash_node) 744 745 /* 746 * Get STA info by index, BROKEN! 747 */ 748 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 749 int idx); 750 /* 751 * Create a new STA info, caller owns returned structure 752 * until sta_info_insert(). 753 */ 754 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 755 const u8 *addr, gfp_t gfp); 756 757 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 758 759 /* 760 * Insert STA info into hash table/list, returns zero or a 761 * -EEXIST if (if the same MAC address is already present). 762 * 763 * Calling the non-rcu version makes the caller relinquish, 764 * the _rcu version calls read_lock_rcu() and must be called 765 * without it held. 766 */ 767 int sta_info_insert(struct sta_info *sta); 768 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 769 770 int __must_check __sta_info_destroy(struct sta_info *sta); 771 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 772 const u8 *addr); 773 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 774 const u8 *addr); 775 776 void sta_info_recalc_tim(struct sta_info *sta); 777 778 int sta_info_init(struct ieee80211_local *local); 779 void sta_info_stop(struct ieee80211_local *local); 780 781 /** 782 * sta_info_flush - flush matching STA entries from the STA table 783 * 784 * Returns the number of removed STA entries. 785 * 786 * @sdata: sdata to remove all stations from 787 * @vlans: if the given interface is an AP interface, also flush VLANs 788 */ 789 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 790 791 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 792 { 793 return __sta_info_flush(sdata, false); 794 } 795 796 void sta_set_rate_info_tx(struct sta_info *sta, 797 const struct ieee80211_tx_rate *rate, 798 struct rate_info *rinfo); 799 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 800 bool tidstats); 801 802 u32 sta_get_expected_throughput(struct sta_info *sta); 803 804 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 805 unsigned long exp_time); 806 u8 sta_info_tx_streams(struct sta_info *sta); 807 808 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 809 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 810 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 811 812 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 813 814 enum sta_stats_type { 815 STA_STATS_RATE_TYPE_INVALID = 0, 816 STA_STATS_RATE_TYPE_LEGACY, 817 STA_STATS_RATE_TYPE_HT, 818 STA_STATS_RATE_TYPE_VHT, 819 STA_STATS_RATE_TYPE_HE, 820 }; 821 822 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 823 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 824 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 825 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 826 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 827 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0) 828 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4) 829 #define STA_STATS_FIELD_BW GENMASK(11, 8) 830 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 831 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 832 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16) 833 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19) 834 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21) 835 836 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 837 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 838 839 #define STA_STATS_RATE_INVALID 0 840 841 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 842 { 843 u32 r; 844 845 r = STA_STATS_FIELD(BW, s->bw); 846 847 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 848 r |= STA_STATS_FIELD(SGI, 1); 849 850 switch (s->encoding) { 851 case RX_ENC_VHT: 852 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 853 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 854 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 855 break; 856 case RX_ENC_HT: 857 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 858 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 859 break; 860 case RX_ENC_LEGACY: 861 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 862 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 863 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 864 break; 865 case RX_ENC_HE: 866 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE); 867 r |= STA_STATS_FIELD(HE_NSS, s->nss); 868 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx); 869 r |= STA_STATS_FIELD(HE_GI, s->he_gi); 870 r |= STA_STATS_FIELD(HE_RU, s->he_ru); 871 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm); 872 break; 873 default: 874 WARN_ON(1); 875 return STA_STATS_RATE_INVALID; 876 } 877 878 return r; 879 } 880 881 #endif /* STA_INFO_H */ 882