1 /* 2 * Copyright 2002-2005, Devicescape Software, Inc. 3 * Copyright 2013-2014 Intel Mobile Communications GmbH 4 * Copyright(c) 2015-2017 Intel Deutschland GmbH 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifndef STA_INFO_H 12 #define STA_INFO_H 13 14 #include <linux/list.h> 15 #include <linux/types.h> 16 #include <linux/if_ether.h> 17 #include <linux/workqueue.h> 18 #include <linux/average.h> 19 #include <linux/bitfield.h> 20 #include <linux/etherdevice.h> 21 #include <linux/rhashtable.h> 22 #include <linux/u64_stats_sync.h> 23 #include "key.h" 24 25 /** 26 * enum ieee80211_sta_info_flags - Stations flags 27 * 28 * These flags are used with &struct sta_info's @flags member, but 29 * only indirectly with set_sta_flag() and friends. 30 * 31 * @WLAN_STA_AUTH: Station is authenticated. 32 * @WLAN_STA_ASSOC: Station is associated. 33 * @WLAN_STA_PS_STA: Station is in power-save mode 34 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. 35 * This bit is always checked so needs to be enabled for all stations 36 * when virtual port control is not in use. 37 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble 38 * frames. 39 * @WLAN_STA_WDS: Station is one of our WDS peers. 40 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the 41 * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next 42 * frame to this station is transmitted. 43 * @WLAN_STA_MFP: Management frame protection is used with this STA. 44 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) 45 * during suspend/resume and station removal. 46 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in 47 * power-save mode logically to flush frames that might still 48 * be in the queues 49 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping 50 * station in power-save mode, reply when the driver unblocks. 51 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. 52 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct 53 * packets. This means the link is enabled. 54 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this 55 * station. 56 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching 57 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this 58 * TDLS peer 59 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on 60 * the BSS base channel. 61 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was 62 * keeping station in power-save mode, reply when the driver 63 * unblocks the station. 64 * @WLAN_STA_SP: Station is in a service period, so don't try to 65 * reply to other uAPSD trigger frames or PS-Poll. 66 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. 67 * @WLAN_STA_INSERTED: This station is inserted into the hash table. 68 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. 69 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. 70 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. 71 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. 72 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX 73 * until pending frames are delivered 74 * 75 * @NUM_WLAN_STA_FLAGS: number of defined flags 76 */ 77 enum ieee80211_sta_info_flags { 78 WLAN_STA_AUTH, 79 WLAN_STA_ASSOC, 80 WLAN_STA_PS_STA, 81 WLAN_STA_AUTHORIZED, 82 WLAN_STA_SHORT_PREAMBLE, 83 WLAN_STA_WDS, 84 WLAN_STA_CLEAR_PS_FILT, 85 WLAN_STA_MFP, 86 WLAN_STA_BLOCK_BA, 87 WLAN_STA_PS_DRIVER, 88 WLAN_STA_PSPOLL, 89 WLAN_STA_TDLS_PEER, 90 WLAN_STA_TDLS_PEER_AUTH, 91 WLAN_STA_TDLS_INITIATOR, 92 WLAN_STA_TDLS_CHAN_SWITCH, 93 WLAN_STA_TDLS_OFF_CHANNEL, 94 WLAN_STA_TDLS_WIDER_BW, 95 WLAN_STA_UAPSD, 96 WLAN_STA_SP, 97 WLAN_STA_4ADDR_EVENT, 98 WLAN_STA_INSERTED, 99 WLAN_STA_RATE_CONTROL, 100 WLAN_STA_TOFFSET_KNOWN, 101 WLAN_STA_MPSP_OWNER, 102 WLAN_STA_MPSP_RECIPIENT, 103 WLAN_STA_PS_DELIVER, 104 105 NUM_WLAN_STA_FLAGS, 106 }; 107 108 #define ADDBA_RESP_INTERVAL HZ 109 #define HT_AGG_MAX_RETRIES 15 110 #define HT_AGG_BURST_RETRIES 3 111 #define HT_AGG_RETRIES_PERIOD (15 * HZ) 112 113 #define HT_AGG_STATE_DRV_READY 0 114 #define HT_AGG_STATE_RESPONSE_RECEIVED 1 115 #define HT_AGG_STATE_OPERATIONAL 2 116 #define HT_AGG_STATE_STOPPING 3 117 #define HT_AGG_STATE_WANT_START 4 118 #define HT_AGG_STATE_WANT_STOP 5 119 #define HT_AGG_STATE_START_CB 6 120 #define HT_AGG_STATE_STOP_CB 7 121 122 DECLARE_EWMA(avg_signal, 10, 8) 123 enum ieee80211_agg_stop_reason { 124 AGG_STOP_DECLINED, 125 AGG_STOP_LOCAL_REQUEST, 126 AGG_STOP_PEER_REQUEST, 127 AGG_STOP_DESTROY_STA, 128 }; 129 130 struct sta_info; 131 132 /** 133 * struct tid_ampdu_tx - TID aggregation information (Tx). 134 * 135 * @rcu_head: rcu head for freeing structure 136 * @session_timer: check if we keep Tx-ing on the TID (by timeout value) 137 * @addba_resp_timer: timer for peer's response to addba request 138 * @pending: pending frames queue -- use sta's spinlock to protect 139 * @sta: station we are attached to 140 * @dialog_token: dialog token for aggregation session 141 * @timeout: session timeout value to be filled in ADDBA requests 142 * @tid: TID number 143 * @state: session state (see above) 144 * @last_tx: jiffies of last tx activity 145 * @stop_initiator: initiator of a session stop 146 * @tx_stop: TX DelBA frame when stopping 147 * @buf_size: reorder buffer size at receiver 148 * @failed_bar_ssn: ssn of the last failed BAR tx attempt 149 * @bar_pending: BAR needs to be re-sent 150 * @amsdu: support A-MSDU withing A-MDPU 151 * 152 * This structure's lifetime is managed by RCU, assignments to 153 * the array holding it must hold the aggregation mutex. 154 * 155 * The TX path can access it under RCU lock-free if, and 156 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL 157 * set. Otherwise, the TX path must also acquire the spinlock 158 * and re-check the state, see comments in the tx code 159 * touching it. 160 */ 161 struct tid_ampdu_tx { 162 struct rcu_head rcu_head; 163 struct timer_list session_timer; 164 struct timer_list addba_resp_timer; 165 struct sk_buff_head pending; 166 struct sta_info *sta; 167 unsigned long state; 168 unsigned long last_tx; 169 u16 timeout; 170 u8 dialog_token; 171 u8 stop_initiator; 172 bool tx_stop; 173 u16 buf_size; 174 175 u16 failed_bar_ssn; 176 bool bar_pending; 177 bool amsdu; 178 u8 tid; 179 }; 180 181 /** 182 * struct tid_ampdu_rx - TID aggregation information (Rx). 183 * 184 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an 185 * A-MSDU with individually reported subframes. 186 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in 187 * the reorder buffer that should be ignored when releasing frames 188 * @reorder_time: jiffies when skb was added 189 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) 190 * @reorder_timer: releases expired frames from the reorder buffer. 191 * @sta: station we are attached to 192 * @last_rx: jiffies of last rx activity 193 * @head_seq_num: head sequence number in reordering buffer. 194 * @stored_mpdu_num: number of MPDUs in reordering buffer 195 * @ssn: Starting Sequence Number expected to be aggregated. 196 * @buf_size: buffer size for incoming A-MPDUs 197 * @timeout: reset timer value (in TUs). 198 * @tid: TID number 199 * @rcu_head: RCU head used for freeing this struct 200 * @reorder_lock: serializes access to reorder buffer, see below. 201 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and 202 * and ssn. 203 * @removed: this session is removed (but might have been found due to RCU) 204 * @started: this session has started (head ssn or higher was received) 205 * 206 * This structure's lifetime is managed by RCU, assignments to 207 * the array holding it must hold the aggregation mutex. 208 * 209 * The @reorder_lock is used to protect the members of this 210 * struct, except for @timeout, @buf_size and @dialog_token, 211 * which are constant across the lifetime of the struct (the 212 * dialog token being used only for debugging). 213 */ 214 struct tid_ampdu_rx { 215 struct rcu_head rcu_head; 216 spinlock_t reorder_lock; 217 u64 reorder_buf_filtered; 218 struct sk_buff_head *reorder_buf; 219 unsigned long *reorder_time; 220 struct sta_info *sta; 221 struct timer_list session_timer; 222 struct timer_list reorder_timer; 223 unsigned long last_rx; 224 u16 head_seq_num; 225 u16 stored_mpdu_num; 226 u16 ssn; 227 u16 buf_size; 228 u16 timeout; 229 u8 tid; 230 u8 auto_seq:1, 231 removed:1, 232 started:1; 233 }; 234 235 /** 236 * struct sta_ampdu_mlme - STA aggregation information. 237 * 238 * @mtx: mutex to protect all TX data (except non-NULL assignments 239 * to tid_tx[idx], which are protected by the sta spinlock) 240 * tid_start_tx is also protected by sta->lock. 241 * @tid_rx: aggregation info for Rx per TID -- RCU protected 242 * @tid_rx_token: dialog tokens for valid aggregation sessions 243 * @tid_rx_timer_expired: bitmap indicating on which TIDs the 244 * RX timer expired until the work for it runs 245 * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the 246 * driver requested to close until the work for it runs 247 * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested 248 * to be treated as started/stopped due to offloading 249 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on 250 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to 251 * unexpected aggregation related frames outside a session 252 * @work: work struct for starting/stopping aggregation 253 * @tid_tx: aggregation info for Tx per TID 254 * @tid_start_tx: sessions where start was requested 255 * @last_addba_req_time: timestamp of the last addBA request. 256 * @addba_req_num: number of times addBA request has been sent. 257 * @dialog_token_allocator: dialog token enumerator for each new session; 258 */ 259 struct sta_ampdu_mlme { 260 struct mutex mtx; 261 /* rx */ 262 struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; 263 u8 tid_rx_token[IEEE80211_NUM_TIDS]; 264 unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 265 unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 266 unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; 267 unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 268 unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; 269 /* tx */ 270 struct work_struct work; 271 struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; 272 struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; 273 unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; 274 u8 addba_req_num[IEEE80211_NUM_TIDS]; 275 u8 dialog_token_allocator; 276 }; 277 278 279 /* Value to indicate no TID reservation */ 280 #define IEEE80211_TID_UNRESERVED 0xff 281 282 #define IEEE80211_FAST_XMIT_MAX_IV 18 283 284 /** 285 * struct ieee80211_fast_tx - TX fastpath information 286 * @key: key to use for hw crypto 287 * @hdr: the 802.11 header to put with the frame 288 * @hdr_len: actual 802.11 header length 289 * @sa_offs: offset of the SA 290 * @da_offs: offset of the DA 291 * @pn_offs: offset where to put PN for crypto (or 0 if not needed) 292 * @band: band this will be transmitted on, for tx_info 293 * @rcu_head: RCU head to free this struct 294 * 295 * This struct is small enough so that the common case (maximum crypto 296 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte 297 * cache line. 298 */ 299 struct ieee80211_fast_tx { 300 struct ieee80211_key *key; 301 u8 hdr_len; 302 u8 sa_offs, da_offs, pn_offs; 303 u8 band; 304 u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + 305 sizeof(rfc1042_header)] __aligned(2); 306 307 struct rcu_head rcu_head; 308 }; 309 310 /** 311 * struct ieee80211_fast_rx - RX fastpath information 312 * @dev: netdevice for reporting the SKB 313 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) 314 * @vif_addr: interface address 315 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) 316 * @control_port_protocol: control port protocol copied from sdata 317 * @expected_ds_bits: from/to DS bits expected 318 * @icv_len: length of the MIC if present 319 * @key: bool indicating encryption is expected (key is set) 320 * @sta_notify: notify the MLME code (once) 321 * @internal_forward: forward froms internally on AP/VLAN type interfaces 322 * @uses_rss: copy of USES_RSS hw flag 323 * @da_offs: offset of the DA in the header (for header conversion) 324 * @sa_offs: offset of the SA in the header (for header conversion) 325 * @rcu_head: RCU head for freeing this structure 326 */ 327 struct ieee80211_fast_rx { 328 struct net_device *dev; 329 enum nl80211_iftype vif_type; 330 u8 vif_addr[ETH_ALEN] __aligned(2); 331 u8 rfc1042_hdr[6] __aligned(2); 332 __be16 control_port_protocol; 333 __le16 expected_ds_bits; 334 u8 icv_len; 335 u8 key:1, 336 sta_notify:1, 337 internal_forward:1, 338 uses_rss:1; 339 u8 da_offs, sa_offs; 340 341 struct rcu_head rcu_head; 342 }; 343 344 /* we use only values in the range 0-100, so pick a large precision */ 345 DECLARE_EWMA(mesh_fail_avg, 20, 8) 346 347 /** 348 * struct mesh_sta - mesh STA information 349 * @plink_lock: serialize access to plink fields 350 * @llid: Local link ID 351 * @plid: Peer link ID 352 * @aid: local aid supplied by peer 353 * @reason: Cancel reason on PLINK_HOLDING state 354 * @plink_retries: Retries in establishment 355 * @plink_state: peer link state 356 * @plink_timeout: timeout of peer link 357 * @plink_timer: peer link watch timer 358 * @plink_sta: peer link watch timer's sta_info 359 * @t_offset: timing offset relative to this host 360 * @t_offset_setpoint: reference timing offset of this sta to be used when 361 * calculating clockdrift 362 * @local_pm: local link-specific power save mode 363 * @peer_pm: peer-specific power save mode towards local STA 364 * @nonpeer_pm: STA power save mode towards non-peer neighbors 365 * @processed_beacon: set to true after peer rates and capabilities are 366 * processed 367 * @connected_to_gate: true if mesh STA has a path to a mesh gate 368 * @fail_avg: moving percentage of failed MSDUs 369 */ 370 struct mesh_sta { 371 struct timer_list plink_timer; 372 struct sta_info *plink_sta; 373 374 s64 t_offset; 375 s64 t_offset_setpoint; 376 377 spinlock_t plink_lock; 378 u16 llid; 379 u16 plid; 380 u16 aid; 381 u16 reason; 382 u8 plink_retries; 383 384 bool processed_beacon; 385 bool connected_to_gate; 386 387 enum nl80211_plink_state plink_state; 388 u32 plink_timeout; 389 390 /* mesh power save */ 391 enum nl80211_mesh_power_mode local_pm; 392 enum nl80211_mesh_power_mode peer_pm; 393 enum nl80211_mesh_power_mode nonpeer_pm; 394 395 /* moving percentage of failed MSDUs */ 396 struct ewma_mesh_fail_avg fail_avg; 397 }; 398 399 DECLARE_EWMA(signal, 10, 8) 400 401 struct ieee80211_sta_rx_stats { 402 unsigned long packets; 403 unsigned long last_rx; 404 unsigned long num_duplicates; 405 unsigned long fragments; 406 unsigned long dropped; 407 int last_signal; 408 u8 chains; 409 s8 chain_signal_last[IEEE80211_MAX_CHAINS]; 410 u32 last_rate; 411 struct u64_stats_sync syncp; 412 u64 bytes; 413 u64 msdu[IEEE80211_NUM_TIDS + 1]; 414 }; 415 416 /* 417 * The bandwidth threshold below which the per-station CoDel parameters will be 418 * scaled to be more lenient (to prevent starvation of slow stations). This 419 * value will be scaled by the number of active stations when it is being 420 * applied. 421 */ 422 #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ 423 424 /** 425 * struct sta_info - STA information 426 * 427 * This structure collects information about a station that 428 * mac80211 is communicating with. 429 * 430 * @list: global linked list entry 431 * @free_list: list entry for keeping track of stations to free 432 * @hash_node: hash node for rhashtable 433 * @addr: station's MAC address - duplicated from public part to 434 * let the hash table work with just a single cacheline 435 * @local: pointer to the global information 436 * @sdata: virtual interface this station belongs to 437 * @ptk: peer keys negotiated with this station, if any 438 * @ptk_idx: last installed peer key index 439 * @gtk: group keys negotiated with this station, if any 440 * @rate_ctrl: rate control algorithm reference 441 * @rate_ctrl_lock: spinlock used to protect rate control data 442 * (data inside the algorithm, so serializes calls there) 443 * @rate_ctrl_priv: rate control private per-STA pointer 444 * @lock: used for locking all fields that require locking, see comments 445 * in the header file. 446 * @drv_deliver_wk: used for delivering frames after driver PS unblocking 447 * @listen_interval: listen interval of this station, when we're acting as AP 448 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly 449 * @ps_lock: used for powersave (when mac80211 is the AP) related locking 450 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station 451 * when it leaves power saving state or polls 452 * @tx_filtered: buffers (per AC) of frames we already tried to 453 * transmit but were filtered by hardware due to STA having 454 * entered power saving state, these are also delivered to 455 * the station when it leaves powersave or polls for frames 456 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on 457 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on 458 * @last_connected: time (in seconds) when a station got connected 459 * @last_seq_ctrl: last received seq/frag number from this STA (per TID 460 * plus one for non-QoS frames) 461 * @tid_seq: per-TID sequence numbers for sending to this STA 462 * @ampdu_mlme: A-MPDU state machine state 463 * @mesh: mesh STA information 464 * @debugfs_dir: debug filesystem directory dentry 465 * @dead: set to true when sta is unlinked 466 * @removed: set to true when sta is being removed from sta_list 467 * @uploaded: set to true when sta is uploaded to the driver 468 * @sta: station information we share with the driver 469 * @sta_state: duplicates information about station state (for debug) 470 * @rcu_head: RCU head used for freeing this station struct 471 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, 472 * taken from HT/VHT capabilities or VHT operating mode notification 473 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for 474 * AP only. 475 * @cipher_scheme: optional cipher scheme for this station 476 * @cparams: CoDel parameters for this station. 477 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) 478 * @fast_tx: TX fastpath information 479 * @fast_rx: RX fastpath information 480 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to 481 * the BSS one. 482 * @tx_stats: TX statistics 483 * @rx_stats: RX statistics 484 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs 485 * this (by advertising the USES_RSS hw flag) 486 * @status_stats: TX status statistics 487 */ 488 struct sta_info { 489 /* General information, mostly static */ 490 struct list_head list, free_list; 491 struct rcu_head rcu_head; 492 struct rhlist_head hash_node; 493 u8 addr[ETH_ALEN]; 494 struct ieee80211_local *local; 495 struct ieee80211_sub_if_data *sdata; 496 struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; 497 struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; 498 u8 ptk_idx; 499 struct rate_control_ref *rate_ctrl; 500 void *rate_ctrl_priv; 501 spinlock_t rate_ctrl_lock; 502 spinlock_t lock; 503 504 struct ieee80211_fast_tx __rcu *fast_tx; 505 struct ieee80211_fast_rx __rcu *fast_rx; 506 struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; 507 508 #ifdef CONFIG_MAC80211_MESH 509 struct mesh_sta *mesh; 510 #endif 511 512 struct work_struct drv_deliver_wk; 513 514 u16 listen_interval; 515 516 bool dead; 517 bool removed; 518 519 bool uploaded; 520 521 enum ieee80211_sta_state sta_state; 522 523 /* use the accessors defined below */ 524 unsigned long _flags; 525 526 /* STA powersave lock and frame queues */ 527 spinlock_t ps_lock; 528 struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; 529 struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; 530 unsigned long driver_buffered_tids; 531 unsigned long txq_buffered_tids; 532 533 long last_connected; 534 535 /* Updated from RX path only, no locking requirements */ 536 struct ieee80211_sta_rx_stats rx_stats; 537 struct { 538 struct ewma_signal signal; 539 struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; 540 } rx_stats_avg; 541 542 /* Plus 1 for non-QoS frames */ 543 __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; 544 545 /* Updated from TX status path only, no locking requirements */ 546 struct { 547 unsigned long filtered; 548 unsigned long retry_failed, retry_count; 549 unsigned int lost_packets; 550 unsigned long last_tdls_pkt_time; 551 u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; 552 u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; 553 unsigned long last_ack; 554 s8 last_ack_signal; 555 bool ack_signal_filled; 556 struct ewma_avg_signal avg_ack_signal; 557 } status_stats; 558 559 /* Updated from TX path only, no locking requirements */ 560 struct { 561 u64 packets[IEEE80211_NUM_ACS]; 562 u64 bytes[IEEE80211_NUM_ACS]; 563 struct ieee80211_tx_rate last_rate; 564 u64 msdu[IEEE80211_NUM_TIDS + 1]; 565 } tx_stats; 566 u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; 567 568 /* 569 * Aggregation information, locked with lock. 570 */ 571 struct sta_ampdu_mlme ampdu_mlme; 572 573 #ifdef CONFIG_MAC80211_DEBUGFS 574 struct dentry *debugfs_dir; 575 #endif 576 577 enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; 578 579 enum ieee80211_smps_mode known_smps_mode; 580 const struct ieee80211_cipher_scheme *cipher_scheme; 581 582 struct codel_params cparams; 583 584 u8 reserved_tid; 585 586 struct cfg80211_chan_def tdls_chandef; 587 588 /* keep last! */ 589 struct ieee80211_sta sta; 590 }; 591 592 static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) 593 { 594 #ifdef CONFIG_MAC80211_MESH 595 return sta->mesh->plink_state; 596 #endif 597 return NL80211_PLINK_LISTEN; 598 } 599 600 static inline void set_sta_flag(struct sta_info *sta, 601 enum ieee80211_sta_info_flags flag) 602 { 603 WARN_ON(flag == WLAN_STA_AUTH || 604 flag == WLAN_STA_ASSOC || 605 flag == WLAN_STA_AUTHORIZED); 606 set_bit(flag, &sta->_flags); 607 } 608 609 static inline void clear_sta_flag(struct sta_info *sta, 610 enum ieee80211_sta_info_flags flag) 611 { 612 WARN_ON(flag == WLAN_STA_AUTH || 613 flag == WLAN_STA_ASSOC || 614 flag == WLAN_STA_AUTHORIZED); 615 clear_bit(flag, &sta->_flags); 616 } 617 618 static inline int test_sta_flag(struct sta_info *sta, 619 enum ieee80211_sta_info_flags flag) 620 { 621 return test_bit(flag, &sta->_flags); 622 } 623 624 static inline int test_and_clear_sta_flag(struct sta_info *sta, 625 enum ieee80211_sta_info_flags flag) 626 { 627 WARN_ON(flag == WLAN_STA_AUTH || 628 flag == WLAN_STA_ASSOC || 629 flag == WLAN_STA_AUTHORIZED); 630 return test_and_clear_bit(flag, &sta->_flags); 631 } 632 633 static inline int test_and_set_sta_flag(struct sta_info *sta, 634 enum ieee80211_sta_info_flags flag) 635 { 636 WARN_ON(flag == WLAN_STA_AUTH || 637 flag == WLAN_STA_ASSOC || 638 flag == WLAN_STA_AUTHORIZED); 639 return test_and_set_bit(flag, &sta->_flags); 640 } 641 642 int sta_info_move_state(struct sta_info *sta, 643 enum ieee80211_sta_state new_state); 644 645 static inline void sta_info_pre_move_state(struct sta_info *sta, 646 enum ieee80211_sta_state new_state) 647 { 648 int ret; 649 650 WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); 651 652 ret = sta_info_move_state(sta, new_state); 653 WARN_ON_ONCE(ret); 654 } 655 656 657 void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, 658 struct tid_ampdu_tx *tid_tx); 659 660 static inline struct tid_ampdu_tx * 661 rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) 662 { 663 return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], 664 lockdep_is_held(&sta->lock) || 665 lockdep_is_held(&sta->ampdu_mlme.mtx)); 666 } 667 668 /* Maximum number of frames to buffer per power saving station per AC */ 669 #define STA_MAX_TX_BUFFER 64 670 671 /* Minimum buffered frame expiry time. If STA uses listen interval that is 672 * smaller than this value, the minimum value here is used instead. */ 673 #define STA_TX_BUFFER_EXPIRE (10 * HZ) 674 675 /* How often station data is cleaned up (e.g., expiration of buffered frames) 676 */ 677 #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) 678 679 struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, 680 const u8 *addr); 681 682 /* 683 * Get a STA info, must be under RCU read lock. 684 */ 685 struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, 686 const u8 *addr); 687 688 struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, 689 const u8 *addr); 690 691 #define for_each_sta_info(local, _addr, _sta, _tmp) \ 692 rhl_for_each_entry_rcu(_sta, _tmp, \ 693 sta_info_hash_lookup(local, _addr), hash_node) 694 695 /* 696 * Get STA info by index, BROKEN! 697 */ 698 struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, 699 int idx); 700 /* 701 * Create a new STA info, caller owns returned structure 702 * until sta_info_insert(). 703 */ 704 struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, 705 const u8 *addr, gfp_t gfp); 706 707 void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); 708 709 /* 710 * Insert STA info into hash table/list, returns zero or a 711 * -EEXIST if (if the same MAC address is already present). 712 * 713 * Calling the non-rcu version makes the caller relinquish, 714 * the _rcu version calls read_lock_rcu() and must be called 715 * without it held. 716 */ 717 int sta_info_insert(struct sta_info *sta); 718 int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); 719 720 int __must_check __sta_info_destroy(struct sta_info *sta); 721 int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, 722 const u8 *addr); 723 int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, 724 const u8 *addr); 725 726 void sta_info_recalc_tim(struct sta_info *sta); 727 728 int sta_info_init(struct ieee80211_local *local); 729 void sta_info_stop(struct ieee80211_local *local); 730 731 /** 732 * sta_info_flush - flush matching STA entries from the STA table 733 * 734 * Returns the number of removed STA entries. 735 * 736 * @sdata: sdata to remove all stations from 737 * @vlans: if the given interface is an AP interface, also flush VLANs 738 */ 739 int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); 740 741 static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) 742 { 743 return __sta_info_flush(sdata, false); 744 } 745 746 void sta_set_rate_info_tx(struct sta_info *sta, 747 const struct ieee80211_tx_rate *rate, 748 struct rate_info *rinfo); 749 void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo, 750 bool tidstats); 751 752 u32 sta_get_expected_throughput(struct sta_info *sta); 753 754 void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 755 unsigned long exp_time); 756 u8 sta_info_tx_streams(struct sta_info *sta); 757 758 void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 759 void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); 760 void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 761 762 unsigned long ieee80211_sta_last_active(struct sta_info *sta); 763 764 enum sta_stats_type { 765 STA_STATS_RATE_TYPE_INVALID = 0, 766 STA_STATS_RATE_TYPE_LEGACY, 767 STA_STATS_RATE_TYPE_HT, 768 STA_STATS_RATE_TYPE_VHT, 769 STA_STATS_RATE_TYPE_HE, 770 }; 771 772 #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) 773 #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) 774 #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) 775 #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) 776 #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) 777 #define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0) 778 #define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4) 779 #define STA_STATS_FIELD_BW GENMASK(11, 8) 780 #define STA_STATS_FIELD_SGI GENMASK(12, 12) 781 #define STA_STATS_FIELD_TYPE GENMASK(15, 13) 782 #define STA_STATS_FIELD_HE_RU GENMASK(18, 16) 783 #define STA_STATS_FIELD_HE_GI GENMASK(20, 19) 784 #define STA_STATS_FIELD_HE_DCM GENMASK(21, 21) 785 786 #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) 787 #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) 788 789 #define STA_STATS_RATE_INVALID 0 790 791 static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) 792 { 793 u32 r; 794 795 r = STA_STATS_FIELD(BW, s->bw); 796 797 if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) 798 r |= STA_STATS_FIELD(SGI, 1); 799 800 switch (s->encoding) { 801 case RX_ENC_VHT: 802 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); 803 r |= STA_STATS_FIELD(VHT_NSS, s->nss); 804 r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); 805 break; 806 case RX_ENC_HT: 807 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); 808 r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); 809 break; 810 case RX_ENC_LEGACY: 811 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); 812 r |= STA_STATS_FIELD(LEGACY_BAND, s->band); 813 r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); 814 break; 815 case RX_ENC_HE: 816 r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE); 817 r |= STA_STATS_FIELD(HE_NSS, s->nss); 818 r |= STA_STATS_FIELD(HE_MCS, s->rate_idx); 819 r |= STA_STATS_FIELD(HE_GI, s->he_gi); 820 r |= STA_STATS_FIELD(HE_RU, s->he_ru); 821 r |= STA_STATS_FIELD(HE_DCM, s->he_dcm); 822 break; 823 default: 824 WARN_ON(1); 825 return STA_STATS_RATE_INVALID; 826 } 827 828 return r; 829 } 830 831 #endif /* STA_INFO_H */ 832