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