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 WLAN_STA_USES_ENCRYPTION, 102 103 NUM_WLAN_STA_FLAGS, 104 }; 105 106 #define ADDBA_RESP_INTERVAL HZ 107 #define HT_AGG_MAX_RETRIES 15 108 #define HT_AGG_BURST_RETRIES 3 109 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 110 111 #define HT_AGG_STATE_DRV_READY 0 112 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 113 #define HT_AGG_STATE_OPERATIONAL 2 114 #define HT_AGG_STATE_STOPPING 3 115 #define HT_AGG_STATE_WANT_START 4 116 #define HT_AGG_STATE_WANT_STOP 5 117 #define HT_AGG_STATE_START_CB 6 118 #define HT_AGG_STATE_STOP_CB 7 119 120 DECLARE_EWMA(avg_signal, 10, 8) 121 enum ieee80211_agg_stop_reason { 122 AGG_STOP_DECLINED, 123 AGG_STOP_LOCAL_REQUEST, 124 AGG_STOP_PEER_REQUEST, 125 AGG_STOP_DESTROY_STA, 126 }; 127 128 /* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */ 129 #define AIRTIME_USE_TX BIT(0) 130 #define AIRTIME_USE_RX BIT(1) 131 132 struct airtime_info { 133 u64 rx_airtime; 134 u64 tx_airtime; 135 s64 deficit; 136 atomic_t aql_tx_pending; /* Estimated airtime for frames pending */ 137 u32 aql_limit_low; 138 u32 aql_limit_high; 139 }; 140 141 void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local, 142 struct sta_info *sta, u8 ac, 143 u16 tx_airtime, bool tx_completed); 144 145 struct sta_info; 146 147 /** 148 * struct tid_ampdu_tx - TID aggregation information (Tx). 149 * 150 * @rcu_head: rcu head for freeing structure 151 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 152 * @addba_resp_timer: timer for peer's response to addba request 153 * @pending: pending frames queue -- use sta's spinlock to protect 154 * @sta: station we are attached to 155 * @dialog_token: dialog token for aggregation session 156 * @timeout: session timeout value to be filled in ADDBA requests 157 * @tid: TID number 158 * @state: session state (see above) 159 * @last_tx: jiffies of last tx activity 160 * @stop_initiator: initiator of a session stop 161 * @tx_stop: TX DelBA frame when stopping 162 * @buf_size: reorder buffer size at receiver 163 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 164 * @bar_pending: BAR needs to be re-sent 165 * @amsdu: support A-MSDU withing A-MDPU 166 * 167 * This structure's lifetime is managed by RCU, assignments to 168 * the array holding it must hold the aggregation mutex. 169 * 170 * The TX path can access it under RCU lock-free if, and 171 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 172 * set. Otherwise, the TX path must also acquire the spinlock 173 * and re-check the state, see comments in the tx code 174 * touching it. 175 */ 176 struct tid_ampdu_tx { 177 struct rcu_head rcu_head; 178 struct timer_list session_timer; 179 struct timer_list addba_resp_timer; 180 struct sk_buff_head pending; 181 struct sta_info *sta; 182 unsigned long state; 183 unsigned long last_tx; 184 u16 timeout; 185 u8 dialog_token; 186 u8 stop_initiator; 187 bool tx_stop; 188 u16 buf_size; 189 190 u16 failed_bar_ssn; 191 bool bar_pending; 192 bool amsdu; 193 u8 tid; 194 }; 195 196 /** 197 * struct tid_ampdu_rx - TID aggregation information (Rx). 198 * 199 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 200 * A-MSDU with individually reported subframes. 201 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 202 * the reorder buffer that should be ignored when releasing frames 203 * @reorder_time: jiffies when skb was added 204 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 205 * @reorder_timer: releases expired frames from the reorder buffer. 206 * @sta: station we are attached to 207 * @last_rx: jiffies of last rx activity 208 * @head_seq_num: head sequence number in reordering buffer. 209 * @stored_mpdu_num: number of MPDUs in reordering buffer 210 * @ssn: Starting Sequence Number expected to be aggregated. 211 * @buf_size: buffer size for incoming A-MPDUs 212 * @timeout: reset timer value (in TUs). 213 * @tid: TID number 214 * @rcu_head: RCU head used for freeing this struct 215 * @reorder_lock: serializes access to reorder buffer, see below. 216 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 217 * and ssn. 218 * @removed: this session is removed (but might have been found due to RCU) 219 * @started: this session has started (head ssn or higher was received) 220 * 221 * This structure's lifetime is managed by RCU, assignments to 222 * the array holding it must hold the aggregation mutex. 223 * 224 * The @reorder_lock is used to protect the members of this 225 * struct, except for @timeout, @buf_size and @dialog_token, 226 * which are constant across the lifetime of the struct (the 227 * dialog token being used only for debugging). 228 */ 229 struct tid_ampdu_rx { 230 struct rcu_head rcu_head; 231 spinlock_t reorder_lock; 232 u64 reorder_buf_filtered; 233 struct sk_buff_head *reorder_buf; 234 unsigned long *reorder_time; 235 struct sta_info *sta; 236 struct timer_list session_timer; 237 struct timer_list reorder_timer; 238 unsigned long last_rx; 239 u16 head_seq_num; 240 u16 stored_mpdu_num; 241 u16 ssn; 242 u16 buf_size; 243 u16 timeout; 244 u8 tid; 245 u8 auto_seq:1, 246 removed:1, 247 started:1; 248 }; 249 250 /** 251 * struct sta_ampdu_mlme - STA aggregation information. 252 * 253 * @mtx: mutex to protect all TX data (except non-NULL assignments 254 * to tid_tx[idx], which are protected by the sta spinlock) 255 * tid_start_tx is also protected by sta->lock. 256 * @tid_rx: aggregation info for Rx per TID -- RCU protected 257 * @tid_rx_token: dialog tokens for valid aggregation sessions 258 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 259 * RX timer expired until the work for it runs 260 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 261 * driver requested to close until the work for it runs 262 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested 263 * to be treated as started/stopped due to offloading 264 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 265 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 266 * unexpected aggregation related frames outside a session 267 * @work: work struct for starting/stopping aggregation 268 * @tid_tx: aggregation info for Tx per TID 269 * @tid_start_tx: sessions where start was requested 270 * @last_addba_req_time: timestamp of the last addBA request. 271 * @addba_req_num: number of times addBA request has been sent. 272 * @dialog_token_allocator: dialog token enumerator for each new session; 273 */ 274 struct sta_ampdu_mlme { 275 struct mutex mtx; 276 /* rx */ 277 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 278 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 279 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 280 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 281 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; 282 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 283 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 284 /* tx */ 285 struct work_struct work; 286 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 287 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 288 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 289 u8 addba_req_num[IEEE80211_NUM_TIDS]; 290 u8 dialog_token_allocator; 291 }; 292 293 294 /* Value to indicate no TID reservation */ 295 #define IEEE80211_TID_UNRESERVED 0xff 296 297 #define IEEE80211_FAST_XMIT_MAX_IV 18 298 299 /** 300 * struct ieee80211_fast_tx - TX fastpath information 301 * @key: key to use for hw crypto 302 * @hdr: the 802.11 header to put with the frame 303 * @hdr_len: actual 802.11 header length 304 * @sa_offs: offset of the SA 305 * @da_offs: offset of the DA 306 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 307 * @band: band this will be transmitted on, for tx_info 308 * @rcu_head: RCU head to free this struct 309 * 310 * This struct is small enough so that the common case (maximum crypto 311 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 312 * cache line. 313 */ 314 struct ieee80211_fast_tx { 315 struct ieee80211_key *key; 316 u8 hdr_len; 317 u8 sa_offs, da_offs, pn_offs; 318 u8 band; 319 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 320 sizeof(rfc1042_header)] __aligned(2); 321 322 struct rcu_head rcu_head; 323 }; 324 325 /** 326 * struct ieee80211_fast_rx - RX fastpath information 327 * @dev: netdevice for reporting the SKB 328 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 329 * @vif_addr: interface address 330 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 331 * @control_port_protocol: control port protocol copied from sdata 332 * @expected_ds_bits: from/to DS bits expected 333 * @icv_len: length of the MIC if present 334 * @key: bool indicating encryption is expected (key is set) 335 * @sta_notify: notify the MLME code (once) 336 * @internal_forward: forward froms internally on AP/VLAN type interfaces 337 * @uses_rss: copy of USES_RSS hw flag 338 * @da_offs: offset of the DA in the header (for header conversion) 339 * @sa_offs: offset of the SA in the header (for header conversion) 340 * @rcu_head: RCU head for freeing this structure 341 */ 342 struct ieee80211_fast_rx { 343 struct net_device *dev; 344 enum nl80211_iftype vif_type; 345 u8 vif_addr[ETH_ALEN] __aligned(2); 346 u8 rfc1042_hdr[6] __aligned(2); 347 __be16 control_port_protocol; 348 __le16 expected_ds_bits; 349 u8 icv_len; 350 u8 key:1, 351 sta_notify:1, 352 internal_forward:1, 353 uses_rss:1; 354 u8 da_offs, sa_offs; 355 356 struct rcu_head rcu_head; 357 }; 358 359 /* we use only values in the range 0-100, so pick a large precision */ 360 DECLARE_EWMA(mesh_fail_avg, 20, 8) 361 DECLARE_EWMA(mesh_tx_rate_avg, 8, 16) 362 363 /** 364 * struct mesh_sta - mesh STA information 365 * @plink_lock: serialize access to plink fields 366 * @llid: Local link ID 367 * @plid: Peer link ID 368 * @aid: local aid supplied by peer 369 * @reason: Cancel reason on PLINK_HOLDING state 370 * @plink_retries: Retries in establishment 371 * @plink_state: peer link state 372 * @plink_timeout: timeout of peer link 373 * @plink_timer: peer link watch timer 374 * @plink_sta: peer link watch timer's sta_info 375 * @t_offset: timing offset relative to this host 376 * @t_offset_setpoint: reference timing offset of this sta to be used when 377 * calculating clockdrift 378 * @local_pm: local link-specific power save mode 379 * @peer_pm: peer-specific power save mode towards local STA 380 * @nonpeer_pm: STA power save mode towards non-peer neighbors 381 * @processed_beacon: set to true after peer rates and capabilities are 382 * processed 383 * @connected_to_gate: true if mesh STA has a path to a mesh gate 384 * @fail_avg: moving percentage of failed MSDUs 385 * @tx_rate_avg: moving average of tx bitrate 386 */ 387 struct mesh_sta { 388 struct timer_list plink_timer; 389 struct sta_info *plink_sta; 390 391 s64 t_offset; 392 s64 t_offset_setpoint; 393 394 spinlock_t plink_lock; 395 u16 llid; 396 u16 plid; 397 u16 aid; 398 u16 reason; 399 u8 plink_retries; 400 401 bool processed_beacon; 402 bool connected_to_gate; 403 404 enum nl80211_plink_state plink_state; 405 u32 plink_timeout; 406 407 /* mesh power save */ 408 enum nl80211_mesh_power_mode local_pm; 409 enum nl80211_mesh_power_mode peer_pm; 410 enum nl80211_mesh_power_mode nonpeer_pm; 411 412 /* moving percentage of failed MSDUs */ 413 struct ewma_mesh_fail_avg fail_avg; 414 /* moving average of tx bitrate */ 415 struct ewma_mesh_tx_rate_avg tx_rate_avg; 416 }; 417 418 DECLARE_EWMA(signal, 10, 8) 419 420 struct ieee80211_sta_rx_stats { 421 unsigned long packets; 422 unsigned long last_rx; 423 unsigned long num_duplicates; 424 unsigned long fragments; 425 unsigned long dropped; 426 int last_signal; 427 u8 chains; 428 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 429 u32 last_rate; 430 struct u64_stats_sync syncp; 431 u64 bytes; 432 u64 msdu[IEEE80211_NUM_TIDS + 1]; 433 }; 434 435 /* 436 * The bandwidth threshold below which the per-station CoDel parameters will be 437 * scaled to be more lenient (to prevent starvation of slow stations). This 438 * value will be scaled by the number of active stations when it is being 439 * applied. 440 */ 441 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ 442 443 /** 444 * struct sta_info - STA information 445 * 446 * This structure collects information about a station that 447 * mac80211 is communicating with. 448 * 449 * @list: global linked list entry 450 * @free_list: list entry for keeping track of stations to free 451 * @hash_node: hash node for rhashtable 452 * @addr: station's MAC address - duplicated from public part to 453 * let the hash table work with just a single cacheline 454 * @local: pointer to the global information 455 * @sdata: virtual interface this station belongs to 456 * @ptk: peer keys negotiated with this station, if any 457 * @ptk_idx: last installed peer key index 458 * @gtk: group keys negotiated with this station, if any 459 * @rate_ctrl: rate control algorithm reference 460 * @rate_ctrl_lock: spinlock used to protect rate control data 461 * (data inside the algorithm, so serializes calls there) 462 * @rate_ctrl_priv: rate control private per-STA pointer 463 * @lock: used for locking all fields that require locking, see comments 464 * in the header file. 465 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 466 * @listen_interval: listen interval of this station, when we're acting as AP 467 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 468 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 469 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 470 * when it leaves power saving state or polls 471 * @tx_filtered: buffers (per AC) of frames we already tried to 472 * transmit but were filtered by hardware due to STA having 473 * entered power saving state, these are also delivered to 474 * the station when it leaves powersave or polls for frames 475 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 476 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 477 * @assoc_at: clock boottime (in ns) of last association 478 * @last_connected: time (in seconds) when a station got connected 479 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 480 * plus one for non-QoS frames) 481 * @tid_seq: per-TID sequence numbers for sending to this STA 482 * @airtime: per-AC struct airtime_info describing airtime statistics for this 483 * station 484 * @airtime_weight: station weight for airtime fairness calculation purposes 485 * @ampdu_mlme: A-MPDU state machine state 486 * @mesh: mesh STA information 487 * @debugfs_dir: debug filesystem directory dentry 488 * @dead: set to true when sta is unlinked 489 * @removed: set to true when sta is being removed from sta_list 490 * @uploaded: set to true when sta is uploaded to the driver 491 * @sta: station information we share with the driver 492 * @sta_state: duplicates information about station state (for debug) 493 * @rcu_head: RCU head used for freeing this station struct 494 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 495 * taken from HT/VHT capabilities or VHT operating mode notification 496 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 497 * AP only. 498 * @cipher_scheme: optional cipher scheme for this station 499 * @cparams: CoDel parameters for this station. 500 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 501 * @fast_tx: TX fastpath information 502 * @fast_rx: RX fastpath information 503 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 504 * the BSS one. 505 * @tx_stats: TX statistics 506 * @tx_stats.packets: # of packets transmitted 507 * @tx_stats.bytes: # of bytes in all packets transmitted 508 * @tx_stats.last_rate: last TX rate 509 * @tx_stats.msdu: # of transmitted MSDUs per TID 510 * @rx_stats: RX statistics 511 * @rx_stats_avg: averaged RX statistics 512 * @rx_stats_avg.signal: averaged signal 513 * @rx_stats_avg.chain_signal: averaged per-chain signal 514 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 515 * this (by advertising the USES_RSS hw flag) 516 * @status_stats: TX status statistics 517 * @status_stats.filtered: # of filtered frames 518 * @status_stats.retry_failed: # of frames that failed after retry 519 * @status_stats.retry_count: # of retries attempted 520 * @status_stats.lost_packets: # of lost packets 521 * @status_stats.last_tdls_pkt_time: timestamp of last TDLS packet 522 * @status_stats.msdu_retries: # of MSDU retries 523 * @status_stats.msdu_failed: # of failed MSDUs 524 * @status_stats.last_ack: last ack timestamp (jiffies) 525 * @status_stats.last_ack_signal: last ACK signal 526 * @status_stats.ack_signal_filled: last ACK signal validity 527 * @status_stats.avg_ack_signal: average ACK signal 528 */ 529 struct sta_info { 530 /* General information, mostly static */ 531 struct list_head list, free_list; 532 struct rcu_head rcu_head; 533 struct rhlist_head hash_node; 534 u8 addr[ETH_ALEN]; 535 struct ieee80211_local *local; 536 struct ieee80211_sub_if_data *sdata; 537 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + 538 NUM_DEFAULT_MGMT_KEYS + 539 NUM_DEFAULT_BEACON_KEYS]; 540 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 541 u8 ptk_idx; 542 struct rate_control_ref *rate_ctrl; 543 void *rate_ctrl_priv; 544 spinlock_t rate_ctrl_lock; 545 spinlock_t lock; 546 547 struct ieee80211_fast_tx __rcu *fast_tx; 548 struct ieee80211_fast_rx __rcu *fast_rx; 549 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 550 551 #ifdef CONFIG_MAC80211_MESH 552 struct mesh_sta *mesh; 553 #endif 554 555 struct work_struct drv_deliver_wk; 556 557 u16 listen_interval; 558 559 bool dead; 560 bool removed; 561 562 bool uploaded; 563 564 enum ieee80211_sta_state sta_state; 565 566 /* use the accessors defined below */ 567 unsigned long _flags; 568 569 /* STA powersave lock and frame queues */ 570 spinlock_t ps_lock; 571 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 572 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 573 unsigned long driver_buffered_tids; 574 unsigned long txq_buffered_tids; 575 576 u64 assoc_at; 577 long last_connected; 578 579 /* Updated from RX path only, no locking requirements */ 580 struct ieee80211_sta_rx_stats rx_stats; 581 struct { 582 struct ewma_signal signal; 583 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 584 } rx_stats_avg; 585 586 /* Plus 1 for non-QoS frames */ 587 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 588 589 /* Updated from TX status path only, no locking requirements */ 590 struct { 591 unsigned long filtered; 592 unsigned long retry_failed, retry_count; 593 unsigned int lost_packets; 594 unsigned long last_tdls_pkt_time; 595 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 596 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 597 unsigned long last_ack; 598 s8 last_ack_signal; 599 bool ack_signal_filled; 600 struct ewma_avg_signal avg_ack_signal; 601 } status_stats; 602 603 /* Updated from TX path only, no locking requirements */ 604 struct { 605 u64 packets[IEEE80211_NUM_ACS]; 606 u64 bytes[IEEE80211_NUM_ACS]; 607 struct ieee80211_tx_rate last_rate; 608 u64 msdu[IEEE80211_NUM_TIDS + 1]; 609 } tx_stats; 610 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 611 612 struct airtime_info airtime[IEEE80211_NUM_ACS]; 613 u16 airtime_weight; 614 615 /* 616 * Aggregation information, locked with lock. 617 */ 618 struct sta_ampdu_mlme ampdu_mlme; 619 620 #ifdef CONFIG_MAC80211_DEBUGFS 621 struct dentry *debugfs_dir; 622 #endif 623 624 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 625 626 enum ieee80211_smps_mode known_smps_mode; 627 const struct ieee80211_cipher_scheme *cipher_scheme; 628 629 struct codel_params cparams; 630 631 u8 reserved_tid; 632 633 struct cfg80211_chan_def tdls_chandef; 634 635 /* keep last! */ 636 struct ieee80211_sta sta; 637 }; 638 639 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 640 { 641 #ifdef CONFIG_MAC80211_MESH 642 return sta->mesh->plink_state; 643 #endif 644 return NL80211_PLINK_LISTEN; 645 } 646 647 static inline void set_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 set_bit(flag, &sta->_flags); 654 } 655 656 static inline void clear_sta_flag(struct sta_info *sta, 657 enum ieee80211_sta_info_flags flag) 658 { 659 WARN_ON(flag == WLAN_STA_AUTH || 660 flag == WLAN_STA_ASSOC || 661 flag == WLAN_STA_AUTHORIZED); 662 clear_bit(flag, &sta->_flags); 663 } 664 665 static inline int test_sta_flag(struct sta_info *sta, 666 enum ieee80211_sta_info_flags flag) 667 { 668 return test_bit(flag, &sta->_flags); 669 } 670 671 static inline int test_and_clear_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_clear_bit(flag, &sta->_flags); 678 } 679 680 static inline int test_and_set_sta_flag(struct sta_info *sta, 681 enum ieee80211_sta_info_flags flag) 682 { 683 WARN_ON(flag == WLAN_STA_AUTH || 684 flag == WLAN_STA_ASSOC || 685 flag == WLAN_STA_AUTHORIZED); 686 return test_and_set_bit(flag, &sta->_flags); 687 } 688 689 int sta_info_move_state(struct sta_info *sta, 690 enum ieee80211_sta_state new_state); 691 692 static inline void sta_info_pre_move_state(struct sta_info *sta, 693 enum ieee80211_sta_state new_state) 694 { 695 int ret; 696 697 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 698 699 ret = sta_info_move_state(sta, new_state); 700 WARN_ON_ONCE(ret); 701 } 702 703 704 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 705 struct tid_ampdu_tx *tid_tx); 706 707 static inline struct tid_ampdu_tx * 708 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 709 { 710 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 711 lockdep_is_held(&sta->lock) || 712 lockdep_is_held(&sta->ampdu_mlme.mtx)); 713 } 714 715 /* Maximum number of frames to buffer per power saving station per AC */ 716 #define STA_MAX_TX_BUFFER 64 717 718 /* Minimum buffered frame expiry time. If STA uses listen interval that is 719 * smaller than this value, the minimum value here is used instead. */ 720 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 721 722 /* How often station data is cleaned up (e.g., expiration of buffered frames) 723 */ 724 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 725 726 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 727 const u8 *addr); 728 729 /* 730 * Get a STA info, must be under RCU read lock. 731 */ 732 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 733 const u8 *addr); 734 735 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 736 const u8 *addr); 737 738 /* user must hold sta_mtx or be in RCU critical section */ 739 struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local, 740 const u8 *sta_addr, const u8 *vif_addr); 741 742 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 743 rhl_for_each_entry_rcu(_sta, _tmp, \ 744 sta_info_hash_lookup(local, _addr), hash_node) 745 746 /* 747 * Get STA info by index, BROKEN! 748 */ 749 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 750 int idx); 751 /* 752 * Create a new STA info, caller owns returned structure 753 * until sta_info_insert(). 754 */ 755 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 756 const u8 *addr, gfp_t gfp); 757 758 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 759 760 /* 761 * Insert STA info into hash table/list, returns zero or a 762 * -EEXIST if (if the same MAC address is already present). 763 * 764 * Calling the non-rcu version makes the caller relinquish, 765 * the _rcu version calls read_lock_rcu() and must be called 766 * without it held. 767 */ 768 int sta_info_insert(struct sta_info *sta); 769 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 770 771 int __must_check __sta_info_destroy(struct sta_info *sta); 772 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 773 const u8 *addr); 774 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 775 const u8 *addr); 776 777 void sta_info_recalc_tim(struct sta_info *sta); 778 779 int sta_info_init(struct ieee80211_local *local); 780 void sta_info_stop(struct ieee80211_local *local); 781 782 /** 783 * sta_info_flush - flush matching STA entries from the STA table 784 * 785 * Returns the number of removed STA entries. 786 * 787 * @sdata: sdata to remove all stations from 788 * @vlans: if the given interface is an AP interface, also flush VLANs 789 */ 790 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 791 792 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 793 { 794 return __sta_info_flush(sdata, false); 795 } 796 797 void sta_set_rate_info_tx(struct sta_info *sta, 798 const struct ieee80211_tx_rate *rate, 799 struct rate_info *rinfo); 800 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 801 bool tidstats); 802 803 u32 sta_get_expected_throughput(struct sta_info *sta); 804 805 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 806 unsigned long exp_time); 807 u8 sta_info_tx_streams(struct sta_info *sta); 808 809 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 810 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 811 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 812 813 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 814 815 enum sta_stats_type { 816 STA_STATS_RATE_TYPE_INVALID = 0, 817 STA_STATS_RATE_TYPE_LEGACY, 818 STA_STATS_RATE_TYPE_HT, 819 STA_STATS_RATE_TYPE_VHT, 820 STA_STATS_RATE_TYPE_HE, 821 }; 822 823 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 824 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 825 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 826 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 827 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 828 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0) 829 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4) 830 #define STA_STATS_FIELD_BW GENMASK(11, 8) 831 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 832 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 833 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16) 834 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19) 835 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21) 836 837 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 838 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 839 840 #define STA_STATS_RATE_INVALID 0 841 842 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 843 { 844 u32 r; 845 846 r = STA_STATS_FIELD(BW, s->bw); 847 848 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 849 r |= STA_STATS_FIELD(SGI, 1); 850 851 switch (s->encoding) { 852 case RX_ENC_VHT: 853 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 854 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 855 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 856 break; 857 case RX_ENC_HT: 858 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 859 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 860 break; 861 case RX_ENC_LEGACY: 862 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 863 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 864 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 865 break; 866 case RX_ENC_HE: 867 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE); 868 r |= STA_STATS_FIELD(HE_NSS, s->nss); 869 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx); 870 r |= STA_STATS_FIELD(HE_GI, s->he_gi); 871 r |= STA_STATS_FIELD(HE_RU, s->he_ru); 872 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm); 873 break; 874 default: 875 WARN_ON(1); 876 return STA_STATS_RATE_INVALID; 877 } 878 879 return r; 880 } 881 882 #endif /* STA_INFO_H */ 883