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