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