mac80211.h revision 685328b296acc810541d2532957912690273c64a
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#ifndef MAC80211_H 14#define MAC80211_H 15 16#include <linux/bug.h> 17#include <linux/kernel.h> 18#include <linux/if_ether.h> 19#include <linux/skbuff.h> 20#include <linux/ieee80211.h> 21#include <net/cfg80211.h> 22#include <asm/unaligned.h> 23 24/** 25 * DOC: Introduction 26 * 27 * mac80211 is the Linux stack for 802.11 hardware that implements 28 * only partial functionality in hard- or firmware. This document 29 * defines the interface between mac80211 and low-level hardware 30 * drivers. 31 */ 32 33/** 34 * DOC: Calling mac80211 from interrupts 35 * 36 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 37 * called in hardware interrupt context. The low-level driver must not call any 38 * other functions in hardware interrupt context. If there is a need for such 39 * call, the low-level driver should first ACK the interrupt and perform the 40 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 41 * tasklet function. 42 * 43 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 44 * use the non-IRQ-safe functions! 45 */ 46 47/** 48 * DOC: Warning 49 * 50 * If you're reading this document and not the header file itself, it will 51 * be incomplete because not all documentation has been converted yet. 52 */ 53 54/** 55 * DOC: Frame format 56 * 57 * As a general rule, when frames are passed between mac80211 and the driver, 58 * they start with the IEEE 802.11 header and include the same octets that are 59 * sent over the air except for the FCS which should be calculated by the 60 * hardware. 61 * 62 * There are, however, various exceptions to this rule for advanced features: 63 * 64 * The first exception is for hardware encryption and decryption offload 65 * where the IV/ICV may or may not be generated in hardware. 66 * 67 * Secondly, when the hardware handles fragmentation, the frame handed to 68 * the driver from mac80211 is the MSDU, not the MPDU. 69 * 70 * Finally, for received frames, the driver is able to indicate that it has 71 * filled a radiotap header and put that in front of the frame; if it does 72 * not do so then mac80211 may add this under certain circumstances. 73 */ 74 75/** 76 * DOC: mac80211 workqueue 77 * 78 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 79 * The workqueue is a single threaded workqueue and can only be accessed by 80 * helpers for sanity checking. Drivers must ensure all work added onto the 81 * mac80211 workqueue should be cancelled on the driver stop() callback. 82 * 83 * mac80211 will flushed the workqueue upon interface removal and during 84 * suspend. 85 * 86 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 87 * 88 */ 89 90struct device; 91 92/** 93 * enum ieee80211_max_queues - maximum number of queues 94 * 95 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 96 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 97 */ 98enum ieee80211_max_queues { 99 IEEE80211_MAX_QUEUES = 16, 100 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 101}; 102 103#define IEEE80211_INVAL_HW_QUEUE 0xff 104 105/** 106 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 107 * @IEEE80211_AC_VO: voice 108 * @IEEE80211_AC_VI: video 109 * @IEEE80211_AC_BE: best effort 110 * @IEEE80211_AC_BK: background 111 */ 112enum ieee80211_ac_numbers { 113 IEEE80211_AC_VO = 0, 114 IEEE80211_AC_VI = 1, 115 IEEE80211_AC_BE = 2, 116 IEEE80211_AC_BK = 3, 117}; 118#define IEEE80211_NUM_ACS 4 119 120/** 121 * struct ieee80211_tx_queue_params - transmit queue configuration 122 * 123 * The information provided in this structure is required for QoS 124 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 125 * 126 * @aifs: arbitration interframe space [0..255] 127 * @cw_min: minimum contention window [a value of the form 128 * 2^n-1 in the range 1..32767] 129 * @cw_max: maximum contention window [like @cw_min] 130 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 131 * @acm: is mandatory admission control required for the access category 132 * @uapsd: is U-APSD mode enabled for the queue 133 */ 134struct ieee80211_tx_queue_params { 135 u16 txop; 136 u16 cw_min; 137 u16 cw_max; 138 u8 aifs; 139 bool acm; 140 bool uapsd; 141}; 142 143struct ieee80211_low_level_stats { 144 unsigned int dot11ACKFailureCount; 145 unsigned int dot11RTSFailureCount; 146 unsigned int dot11FCSErrorCount; 147 unsigned int dot11RTSSuccessCount; 148}; 149 150/** 151 * enum ieee80211_chanctx_change - change flag for channel context 152 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 153 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 154 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 155 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 156 * this is used only with channel switching with CSA 157 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 158 */ 159enum ieee80211_chanctx_change { 160 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 161 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 162 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 163 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 164 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 165}; 166 167/** 168 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 169 * 170 * This is the driver-visible part. The ieee80211_chanctx 171 * that contains it is visible in mac80211 only. 172 * 173 * @def: the channel definition 174 * @min_def: the minimum channel definition currently required. 175 * @rx_chains_static: The number of RX chains that must always be 176 * active on the channel to receive MIMO transmissions 177 * @rx_chains_dynamic: The number of RX chains that must be enabled 178 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 179 * this will always be >= @rx_chains_static. 180 * @radar_enabled: whether radar detection is enabled on this channel. 181 * @drv_priv: data area for driver use, will always be aligned to 182 * sizeof(void *), size is determined in hw information. 183 */ 184struct ieee80211_chanctx_conf { 185 struct cfg80211_chan_def def; 186 struct cfg80211_chan_def min_def; 187 188 u8 rx_chains_static, rx_chains_dynamic; 189 190 bool radar_enabled; 191 192 u8 drv_priv[0] __aligned(sizeof(void *)); 193}; 194 195/** 196 * enum ieee80211_bss_change - BSS change notification flags 197 * 198 * These flags are used with the bss_info_changed() callback 199 * to indicate which BSS parameter changed. 200 * 201 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 202 * also implies a change in the AID. 203 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 204 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 205 * @BSS_CHANGED_ERP_SLOT: slot timing changed 206 * @BSS_CHANGED_HT: 802.11n parameters changed 207 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 208 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 209 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 210 * reason (IBSS and managed mode) 211 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 212 * new beacon (beaconing modes) 213 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 214 * enabled/disabled (beaconing modes) 215 * @BSS_CHANGED_CQM: Connection quality monitor config changed 216 * @BSS_CHANGED_IBSS: IBSS join status changed 217 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 218 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 219 * that it is only ever disabled for station mode. 220 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 221 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 222 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 223 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 224 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 225 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 226 * changed (currently only in P2P client mode, GO mode will be later) 227 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 228 * currently dtim_period only is under consideration. 229 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 230 * note that this is only called when it changes after the channel 231 * context had been assigned. 232 */ 233enum ieee80211_bss_change { 234 BSS_CHANGED_ASSOC = 1<<0, 235 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 236 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 237 BSS_CHANGED_ERP_SLOT = 1<<3, 238 BSS_CHANGED_HT = 1<<4, 239 BSS_CHANGED_BASIC_RATES = 1<<5, 240 BSS_CHANGED_BEACON_INT = 1<<6, 241 BSS_CHANGED_BSSID = 1<<7, 242 BSS_CHANGED_BEACON = 1<<8, 243 BSS_CHANGED_BEACON_ENABLED = 1<<9, 244 BSS_CHANGED_CQM = 1<<10, 245 BSS_CHANGED_IBSS = 1<<11, 246 BSS_CHANGED_ARP_FILTER = 1<<12, 247 BSS_CHANGED_QOS = 1<<13, 248 BSS_CHANGED_IDLE = 1<<14, 249 BSS_CHANGED_SSID = 1<<15, 250 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 251 BSS_CHANGED_PS = 1<<17, 252 BSS_CHANGED_TXPOWER = 1<<18, 253 BSS_CHANGED_P2P_PS = 1<<19, 254 BSS_CHANGED_BEACON_INFO = 1<<20, 255 BSS_CHANGED_BANDWIDTH = 1<<21, 256 257 /* when adding here, make sure to change ieee80211_reconfig */ 258}; 259 260/* 261 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 262 * of addresses for an interface increase beyond this value, hardware ARP 263 * filtering will be disabled. 264 */ 265#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 266 267/** 268 * enum ieee80211_rssi_event - RSSI threshold event 269 * An indicator for when RSSI goes below/above a certain threshold. 270 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 271 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 272 */ 273enum ieee80211_rssi_event { 274 RSSI_EVENT_HIGH, 275 RSSI_EVENT_LOW, 276}; 277 278/** 279 * struct ieee80211_bss_conf - holds the BSS's changing parameters 280 * 281 * This structure keeps information about a BSS (and an association 282 * to that BSS) that can change during the lifetime of the BSS. 283 * 284 * @assoc: association status 285 * @ibss_joined: indicates whether this station is part of an IBSS 286 * or not 287 * @ibss_creator: indicates if a new IBSS network is being created 288 * @aid: association ID number, valid only when @assoc is true 289 * @use_cts_prot: use CTS protection 290 * @use_short_preamble: use 802.11b short preamble; 291 * if the hardware cannot handle this it must set the 292 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 293 * @use_short_slot: use short slot time (only relevant for ERP); 294 * if the hardware cannot handle this it must set the 295 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 296 * @dtim_period: num of beacons before the next DTIM, for beaconing, 297 * valid in station mode only if after the driver was notified 298 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 299 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 300 * as it may have been received during scanning long ago). If the 301 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 302 * only come from a beacon, but might not become valid until after 303 * association when a beacon is received (which is notified with the 304 * %BSS_CHANGED_DTIM flag.) 305 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 306 * the driver/device can use this to calculate synchronisation 307 * (see @sync_tsf) 308 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 309 * is requested, see @sync_tsf/@sync_device_ts. 310 * @beacon_int: beacon interval 311 * @assoc_capability: capabilities taken from assoc resp 312 * @basic_rates: bitmap of basic rates, each bit stands for an 313 * index into the rate table configured by the driver in 314 * the current band. 315 * @beacon_rate: associated AP's beacon TX rate 316 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 317 * @bssid: The BSSID for this BSS 318 * @enable_beacon: whether beaconing should be enabled or not 319 * @chandef: Channel definition for this BSS -- the hardware might be 320 * configured a higher bandwidth than this BSS uses, for example. 321 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 322 * This field is only valid when the channel type is one of the HT types. 323 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 324 * implies disabled 325 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 326 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 327 * may filter ARP queries targeted for other addresses than listed here. 328 * The driver must allow ARP queries targeted for all address listed here 329 * to pass through. An empty list implies no ARP queries need to pass. 330 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 331 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 332 * array size), it's up to the driver what to do in that case. 333 * @qos: This is a QoS-enabled BSS. 334 * @idle: This interface is idle. There's also a global idle flag in the 335 * hardware config which may be more appropriate depending on what 336 * your driver/device needs to do. 337 * @ps: power-save mode (STA only). This flag is NOT affected by 338 * offchannel/dynamic_ps operations. 339 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 340 * @ssid_len: Length of SSID given in @ssid. 341 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 342 * @txpower: TX power in dBm 343 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 344 */ 345struct ieee80211_bss_conf { 346 const u8 *bssid; 347 /* association related data */ 348 bool assoc, ibss_joined; 349 bool ibss_creator; 350 u16 aid; 351 /* erp related data */ 352 bool use_cts_prot; 353 bool use_short_preamble; 354 bool use_short_slot; 355 bool enable_beacon; 356 u8 dtim_period; 357 u16 beacon_int; 358 u16 assoc_capability; 359 u64 sync_tsf; 360 u32 sync_device_ts; 361 u8 sync_dtim_count; 362 u32 basic_rates; 363 struct ieee80211_rate *beacon_rate; 364 int mcast_rate[IEEE80211_NUM_BANDS]; 365 u16 ht_operation_mode; 366 s32 cqm_rssi_thold; 367 u32 cqm_rssi_hyst; 368 struct cfg80211_chan_def chandef; 369 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 370 int arp_addr_cnt; 371 bool qos; 372 bool idle; 373 bool ps; 374 u8 ssid[IEEE80211_MAX_SSID_LEN]; 375 size_t ssid_len; 376 bool hidden_ssid; 377 int txpower; 378 struct ieee80211_p2p_noa_attr p2p_noa_attr; 379}; 380 381/** 382 * enum mac80211_tx_info_flags - flags to describe transmission information/status 383 * 384 * These flags are used with the @flags member of &ieee80211_tx_info. 385 * 386 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 387 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 388 * number to this frame, taking care of not overwriting the fragment 389 * number and increasing the sequence number only when the 390 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 391 * assign sequence numbers to QoS-data frames but cannot do so correctly 392 * for non-QoS-data and management frames because beacons need them from 393 * that counter as well and mac80211 cannot guarantee proper sequencing. 394 * If this flag is set, the driver should instruct the hardware to 395 * assign a sequence number to the frame or assign one itself. Cf. IEEE 396 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 397 * beacons and always be clear for frames without a sequence number field. 398 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 399 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 400 * station 401 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 402 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 403 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 404 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 405 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 406 * because the destination STA was in powersave mode. Note that to 407 * avoid race conditions, the filter must be set by the hardware or 408 * firmware upon receiving a frame that indicates that the station 409 * went to sleep (must be done on device to filter frames already on 410 * the queue) and may only be unset after mac80211 gives the OK for 411 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 412 * since only then is it guaranteed that no more frames are in the 413 * hardware queue. 414 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 415 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 416 * is for the whole aggregation. 417 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 418 * so consider using block ack request (BAR). 419 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 420 * set by rate control algorithms to indicate probe rate, will 421 * be cleared for fragmented frames (except on the last fragment) 422 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 423 * that a frame can be transmitted while the queues are stopped for 424 * off-channel operation. 425 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 426 * used to indicate that a pending frame requires TX processing before 427 * it can be sent out. 428 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 429 * used to indicate that a frame was already retried due to PS 430 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 431 * used to indicate frame should not be encrypted 432 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 433 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 434 * be sent although the station is in powersave mode. 435 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 436 * transmit function after the current frame, this can be used 437 * by drivers to kick the DMA queue only if unset or when the 438 * queue gets full. 439 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 440 * after TX status because the destination was asleep, it must not 441 * be modified again (no seqno assignment, crypto, etc.) 442 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 443 * code for connection establishment, this indicates that its status 444 * should kick the MLME state machine. 445 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 446 * MLME command (internal to mac80211 to figure out whether to send TX 447 * status to user space) 448 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 449 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 450 * frame and selects the maximum number of streams that it can use. 451 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 452 * the off-channel channel when a remain-on-channel offload is done 453 * in hardware -- normal packets still flow and are expected to be 454 * handled properly by the device. 455 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 456 * testing. It will be sent out with incorrect Michael MIC key to allow 457 * TKIP countermeasures to be tested. 458 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 459 * This flag is actually used for management frame especially for P2P 460 * frames not being sent at CCK rate in 2GHz band. 461 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 462 * when its status is reported the service period ends. For frames in 463 * an SP that mac80211 transmits, it is already set; for driver frames 464 * the driver may set this flag. It is also used to do the same for 465 * PS-Poll responses. 466 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 467 * This flag is used to send nullfunc frame at minimum rate when 468 * the nullfunc is used for connection monitoring purpose. 469 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 470 * would be fragmented by size (this is optional, only used for 471 * monitor injection). 472 * @IEEE80211_TX_CTL_PS_RESPONSE: This frame is a response to a poll 473 * frame (PS-Poll or uAPSD). 474 * 475 * Note: If you have to add new flags to the enumeration, then don't 476 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 477 */ 478enum mac80211_tx_info_flags { 479 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 480 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 481 IEEE80211_TX_CTL_NO_ACK = BIT(2), 482 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 483 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 484 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 485 IEEE80211_TX_CTL_AMPDU = BIT(6), 486 IEEE80211_TX_CTL_INJECTED = BIT(7), 487 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 488 IEEE80211_TX_STAT_ACK = BIT(9), 489 IEEE80211_TX_STAT_AMPDU = BIT(10), 490 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 491 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 492 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 493 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 494 IEEE80211_TX_INTFL_RETRIED = BIT(15), 495 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 496 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 497 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 498 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 499 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 500 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 501 IEEE80211_TX_CTL_LDPC = BIT(22), 502 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 503 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 504 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 505 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 506 IEEE80211_TX_STATUS_EOSP = BIT(28), 507 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 508 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 509 IEEE80211_TX_CTL_PS_RESPONSE = BIT(31), 510}; 511 512#define IEEE80211_TX_CTL_STBC_SHIFT 23 513 514/** 515 * enum mac80211_tx_control_flags - flags to describe transmit control 516 * 517 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 518 * protocol frame (e.g. EAP) 519 * 520 * These flags are used in tx_info->control.flags. 521 */ 522enum mac80211_tx_control_flags { 523 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 524}; 525 526/* 527 * This definition is used as a mask to clear all temporary flags, which are 528 * set by the tx handlers for each transmission attempt by the mac80211 stack. 529 */ 530#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 531 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 532 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 533 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 534 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 535 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 536 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 537 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 538 539/** 540 * enum mac80211_rate_control_flags - per-rate flags set by the 541 * Rate Control algorithm. 542 * 543 * These flags are set by the Rate control algorithm for each rate during tx, 544 * in the @flags member of struct ieee80211_tx_rate. 545 * 546 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 547 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 548 * This is set if the current BSS requires ERP protection. 549 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 550 * @IEEE80211_TX_RC_MCS: HT rate. 551 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 552 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 553 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 554 * Greenfield mode. 555 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 556 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 557 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 558 * (80+80 isn't supported yet) 559 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 560 * adjacent 20 MHz channels, if the current channel type is 561 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 562 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 563 */ 564enum mac80211_rate_control_flags { 565 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 566 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 567 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 568 569 /* rate index is an HT/VHT MCS instead of an index */ 570 IEEE80211_TX_RC_MCS = BIT(3), 571 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 572 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 573 IEEE80211_TX_RC_DUP_DATA = BIT(6), 574 IEEE80211_TX_RC_SHORT_GI = BIT(7), 575 IEEE80211_TX_RC_VHT_MCS = BIT(8), 576 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 577 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 578}; 579 580 581/* there are 40 bytes if you don't need the rateset to be kept */ 582#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 583 584/* if you do need the rateset, then you have less space */ 585#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 586 587/* maximum number of rate stages */ 588#define IEEE80211_TX_MAX_RATES 4 589 590/* maximum number of rate table entries */ 591#define IEEE80211_TX_RATE_TABLE_SIZE 4 592 593/** 594 * struct ieee80211_tx_rate - rate selection/status 595 * 596 * @idx: rate index to attempt to send with 597 * @flags: rate control flags (&enum mac80211_rate_control_flags) 598 * @count: number of tries in this rate before going to the next rate 599 * 600 * A value of -1 for @idx indicates an invalid rate and, if used 601 * in an array of retry rates, that no more rates should be tried. 602 * 603 * When used for transmit status reporting, the driver should 604 * always report the rate along with the flags it used. 605 * 606 * &struct ieee80211_tx_info contains an array of these structs 607 * in the control information, and it will be filled by the rate 608 * control algorithm according to what should be sent. For example, 609 * if this array contains, in the format { <idx>, <count> } the 610 * information 611 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 612 * then this means that the frame should be transmitted 613 * up to twice at rate 3, up to twice at rate 2, and up to four 614 * times at rate 1 if it doesn't get acknowledged. Say it gets 615 * acknowledged by the peer after the fifth attempt, the status 616 * information should then contain 617 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 618 * since it was transmitted twice at rate 3, twice at rate 2 619 * and once at rate 1 after which we received an acknowledgement. 620 */ 621struct ieee80211_tx_rate { 622 s8 idx; 623 u16 count:5, 624 flags:11; 625} __packed; 626 627#define IEEE80211_MAX_TX_RETRY 31 628 629static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 630 u8 mcs, u8 nss) 631{ 632 WARN_ON(mcs & ~0xF); 633 WARN_ON((nss - 1) & ~0x7); 634 rate->idx = ((nss - 1) << 4) | mcs; 635} 636 637static inline u8 638ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 639{ 640 return rate->idx & 0xF; 641} 642 643static inline u8 644ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 645{ 646 return (rate->idx >> 4) + 1; 647} 648 649/** 650 * struct ieee80211_tx_info - skb transmit information 651 * 652 * This structure is placed in skb->cb for three uses: 653 * (1) mac80211 TX control - mac80211 tells the driver what to do 654 * (2) driver internal use (if applicable) 655 * (3) TX status information - driver tells mac80211 what happened 656 * 657 * @flags: transmit info flags, defined above 658 * @band: the band to transmit on (use for checking for races) 659 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 660 * @ack_frame_id: internal frame ID for TX status, used internally 661 * @control: union for control data 662 * @status: union for status data 663 * @driver_data: array of driver_data pointers 664 * @ampdu_ack_len: number of acked aggregated frames. 665 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 666 * @ampdu_len: number of aggregated frames. 667 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 668 * @ack_signal: signal strength of the ACK frame 669 */ 670struct ieee80211_tx_info { 671 /* common information */ 672 u32 flags; 673 u8 band; 674 675 u8 hw_queue; 676 677 u16 ack_frame_id; 678 679 union { 680 struct { 681 union { 682 /* rate control */ 683 struct { 684 struct ieee80211_tx_rate rates[ 685 IEEE80211_TX_MAX_RATES]; 686 s8 rts_cts_rate_idx; 687 u8 use_rts:1; 688 u8 use_cts_prot:1; 689 u8 short_preamble:1; 690 u8 skip_table:1; 691 /* 2 bytes free */ 692 }; 693 /* only needed before rate control */ 694 unsigned long jiffies; 695 }; 696 /* NB: vif can be NULL for injected frames */ 697 struct ieee80211_vif *vif; 698 struct ieee80211_key_conf *hw_key; 699 u32 flags; 700 /* 4 bytes free */ 701 } control; 702 struct { 703 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 704 int ack_signal; 705 u8 ampdu_ack_len; 706 u8 ampdu_len; 707 u8 antenna; 708 /* 21 bytes free */ 709 } status; 710 struct { 711 struct ieee80211_tx_rate driver_rates[ 712 IEEE80211_TX_MAX_RATES]; 713 u8 pad[4]; 714 715 void *rate_driver_data[ 716 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 717 }; 718 void *driver_data[ 719 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 720 }; 721}; 722 723/** 724 * struct ieee80211_sched_scan_ies - scheduled scan IEs 725 * 726 * This structure is used to pass the appropriate IEs to be used in scheduled 727 * scans for all bands. It contains both the IEs passed from the userspace 728 * and the ones generated by mac80211. 729 * 730 * @ie: array with the IEs for each supported band 731 * @len: array with the total length of the IEs for each band 732 */ 733struct ieee80211_sched_scan_ies { 734 u8 *ie[IEEE80211_NUM_BANDS]; 735 size_t len[IEEE80211_NUM_BANDS]; 736}; 737 738static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 739{ 740 return (struct ieee80211_tx_info *)skb->cb; 741} 742 743static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 744{ 745 return (struct ieee80211_rx_status *)skb->cb; 746} 747 748/** 749 * ieee80211_tx_info_clear_status - clear TX status 750 * 751 * @info: The &struct ieee80211_tx_info to be cleared. 752 * 753 * When the driver passes an skb back to mac80211, it must report 754 * a number of things in TX status. This function clears everything 755 * in the TX status but the rate control information (it does clear 756 * the count since you need to fill that in anyway). 757 * 758 * NOTE: You can only use this function if you do NOT use 759 * info->driver_data! Use info->rate_driver_data 760 * instead if you need only the less space that allows. 761 */ 762static inline void 763ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 764{ 765 int i; 766 767 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 768 offsetof(struct ieee80211_tx_info, control.rates)); 769 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 770 offsetof(struct ieee80211_tx_info, driver_rates)); 771 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 772 /* clear the rate counts */ 773 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 774 info->status.rates[i].count = 0; 775 776 BUILD_BUG_ON( 777 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 778 memset(&info->status.ampdu_ack_len, 0, 779 sizeof(struct ieee80211_tx_info) - 780 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 781} 782 783 784/** 785 * enum mac80211_rx_flags - receive flags 786 * 787 * These flags are used with the @flag member of &struct ieee80211_rx_status. 788 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 789 * Use together with %RX_FLAG_MMIC_STRIPPED. 790 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 791 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 792 * verification has been done by the hardware. 793 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 794 * If this flag is set, the stack cannot do any replay detection 795 * hence the driver or hardware will have to do that. 796 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 797 * the frame. 798 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 799 * the frame. 800 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 801 * field) is valid and contains the time the first symbol of the MPDU 802 * was received. This is useful in monitor mode and for proper IBSS 803 * merging. 804 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 805 * field) is valid and contains the time the last symbol of the MPDU 806 * (including FCS) was received. 807 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 808 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 809 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 810 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 811 * @RX_FLAG_80MHZ: 80 MHz was used 812 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 813 * @RX_FLAG_160MHZ: 160 MHz was used 814 * @RX_FLAG_SHORT_GI: Short guard interval was used 815 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 816 * Valid only for data frames (mainly A-MPDU) 817 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 818 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 819 * to hw.radiotap_mcs_details to advertise that fact 820 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 821 * number (@ampdu_reference) must be populated and be a distinct number for 822 * each A-MPDU 823 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 824 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 825 * monitoring purposes only 826 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 827 * subframes of a single A-MPDU 828 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 829 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 830 * on this subframe 831 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 832 * is stored in the @ampdu_delimiter_crc field) 833 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 834 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 835 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 836 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 837 * subframes instead of a one huge frame for performance reasons. 838 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 839 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 840 * the 3rd (last) one must not have this flag set. The flag is used to 841 * deal with retransmission/duplication recovery properly since A-MSDU 842 * subframes share the same sequence number. Reported subframes can be 843 * either regular MSDU or singly A-MSDUs. Subframes must not be 844 * interleaved with other frames. 845 */ 846enum mac80211_rx_flags { 847 RX_FLAG_MMIC_ERROR = BIT(0), 848 RX_FLAG_DECRYPTED = BIT(1), 849 RX_FLAG_MMIC_STRIPPED = BIT(3), 850 RX_FLAG_IV_STRIPPED = BIT(4), 851 RX_FLAG_FAILED_FCS_CRC = BIT(5), 852 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 853 RX_FLAG_MACTIME_START = BIT(7), 854 RX_FLAG_SHORTPRE = BIT(8), 855 RX_FLAG_HT = BIT(9), 856 RX_FLAG_40MHZ = BIT(10), 857 RX_FLAG_SHORT_GI = BIT(11), 858 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 859 RX_FLAG_HT_GF = BIT(13), 860 RX_FLAG_AMPDU_DETAILS = BIT(14), 861 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 862 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 863 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 864 RX_FLAG_AMPDU_IS_LAST = BIT(18), 865 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 866 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 867 RX_FLAG_MACTIME_END = BIT(21), 868 RX_FLAG_VHT = BIT(22), 869 RX_FLAG_80MHZ = BIT(23), 870 RX_FLAG_80P80MHZ = BIT(24), 871 RX_FLAG_160MHZ = BIT(25), 872 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 873 RX_FLAG_10MHZ = BIT(28), 874 RX_FLAG_5MHZ = BIT(29), 875 RX_FLAG_AMSDU_MORE = BIT(30), 876}; 877 878#define RX_FLAG_STBC_SHIFT 26 879 880/** 881 * struct ieee80211_rx_status - receive status 882 * 883 * The low-level driver should provide this information (the subset 884 * supported by hardware) to the 802.11 code with each received 885 * frame, in the skb's control buffer (cb). 886 * 887 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 888 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 889 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 890 * it but can store it and pass it back to the driver for synchronisation 891 * @band: the active band when this frame was received 892 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 893 * @signal: signal strength when receiving this frame, either in dBm, in dB or 894 * unspecified depending on the hardware capabilities flags 895 * @IEEE80211_HW_SIGNAL_* 896 * @chains: bitmask of receive chains for which separate signal strength 897 * values were filled. 898 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 899 * support dB or unspecified units) 900 * @antenna: antenna used 901 * @rate_idx: index of data rate into band's supported rates or MCS index if 902 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 903 * @vht_nss: number of streams (VHT only) 904 * @flag: %RX_FLAG_* 905 * @rx_flags: internal RX flags for mac80211 906 * @ampdu_reference: A-MPDU reference number, must be a different value for 907 * each A-MPDU but the same for each subframe within one A-MPDU 908 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 909 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 910 * @vendor_radiotap_len: radiotap vendor namespace length 911 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 912 * that the actual data must be at the start of the SKB data 913 * already. 914 * @vendor_radiotap_oui: radiotap vendor namespace OUI 915 * @vendor_radiotap_subns: radiotap vendor sub namespace 916 */ 917struct ieee80211_rx_status { 918 u64 mactime; 919 u32 device_timestamp; 920 u32 ampdu_reference; 921 u32 flag; 922 u32 vendor_radiotap_bitmap; 923 u16 vendor_radiotap_len; 924 u16 freq; 925 u8 rate_idx; 926 u8 vht_nss; 927 u8 rx_flags; 928 u8 band; 929 u8 antenna; 930 s8 signal; 931 u8 chains; 932 s8 chain_signal[IEEE80211_MAX_CHAINS]; 933 u8 ampdu_delimiter_crc; 934 u8 vendor_radiotap_align; 935 u8 vendor_radiotap_oui[3]; 936 u8 vendor_radiotap_subns; 937}; 938 939/** 940 * enum ieee80211_conf_flags - configuration flags 941 * 942 * Flags to define PHY configuration options 943 * 944 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 945 * to determine for example whether to calculate timestamps for packets 946 * or not, do not use instead of filter flags! 947 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 948 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 949 * meaning that the hardware still wakes up for beacons, is able to 950 * transmit frames and receive the possible acknowledgment frames. 951 * Not to be confused with hardware specific wakeup/sleep states, 952 * driver is responsible for that. See the section "Powersave support" 953 * for more. 954 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 955 * the driver should be prepared to handle configuration requests but 956 * may turn the device off as much as possible. Typically, this flag will 957 * be set when an interface is set UP but not associated or scanning, but 958 * it can also be unset in that case when monitor interfaces are active. 959 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 960 * operating channel. 961 */ 962enum ieee80211_conf_flags { 963 IEEE80211_CONF_MONITOR = (1<<0), 964 IEEE80211_CONF_PS = (1<<1), 965 IEEE80211_CONF_IDLE = (1<<2), 966 IEEE80211_CONF_OFFCHANNEL = (1<<3), 967}; 968 969 970/** 971 * enum ieee80211_conf_changed - denotes which configuration changed 972 * 973 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 974 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 975 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 976 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 977 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 978 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 979 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 980 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 981 * Note that this is only valid if channel contexts are not used, 982 * otherwise each channel context has the number of chains listed. 983 */ 984enum ieee80211_conf_changed { 985 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 986 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 987 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 988 IEEE80211_CONF_CHANGE_PS = BIT(4), 989 IEEE80211_CONF_CHANGE_POWER = BIT(5), 990 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 991 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 992 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 993}; 994 995/** 996 * enum ieee80211_smps_mode - spatial multiplexing power save mode 997 * 998 * @IEEE80211_SMPS_AUTOMATIC: automatic 999 * @IEEE80211_SMPS_OFF: off 1000 * @IEEE80211_SMPS_STATIC: static 1001 * @IEEE80211_SMPS_DYNAMIC: dynamic 1002 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1003 */ 1004enum ieee80211_smps_mode { 1005 IEEE80211_SMPS_AUTOMATIC, 1006 IEEE80211_SMPS_OFF, 1007 IEEE80211_SMPS_STATIC, 1008 IEEE80211_SMPS_DYNAMIC, 1009 1010 /* keep last */ 1011 IEEE80211_SMPS_NUM_MODES, 1012}; 1013 1014/** 1015 * struct ieee80211_conf - configuration of the device 1016 * 1017 * This struct indicates how the driver shall configure the hardware. 1018 * 1019 * @flags: configuration flags defined above 1020 * 1021 * @listen_interval: listen interval in units of beacon interval 1022 * @max_sleep_period: the maximum number of beacon intervals to sleep for 1023 * before checking the beacon for a TIM bit (managed mode only); this 1024 * value will be only achievable between DTIM frames, the hardware 1025 * needs to check for the multicast traffic bit in DTIM beacons. 1026 * This variable is valid only when the CONF_PS flag is set. 1027 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1028 * in power saving. Power saving will not be enabled until a beacon 1029 * has been received and the DTIM period is known. 1030 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1031 * powersave documentation below. This variable is valid only when 1032 * the CONF_PS flag is set. 1033 * 1034 * @power_level: requested transmit power (in dBm), backward compatibility 1035 * value only that is set to the minimum of all interfaces 1036 * 1037 * @chandef: the channel definition to tune to 1038 * @radar_enabled: whether radar detection is enabled 1039 * 1040 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1041 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1042 * but actually means the number of transmissions not the number of retries 1043 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1044 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1045 * number of transmissions not the number of retries 1046 * 1047 * @smps_mode: spatial multiplexing powersave mode; note that 1048 * %IEEE80211_SMPS_STATIC is used when the device is not 1049 * configured for an HT channel. 1050 * Note that this is only valid if channel contexts are not used, 1051 * otherwise each channel context has the number of chains listed. 1052 */ 1053struct ieee80211_conf { 1054 u32 flags; 1055 int power_level, dynamic_ps_timeout; 1056 int max_sleep_period; 1057 1058 u16 listen_interval; 1059 u8 ps_dtim_period; 1060 1061 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1062 1063 struct cfg80211_chan_def chandef; 1064 bool radar_enabled; 1065 enum ieee80211_smps_mode smps_mode; 1066}; 1067 1068/** 1069 * struct ieee80211_channel_switch - holds the channel switch data 1070 * 1071 * The information provided in this structure is required for channel switch 1072 * operation. 1073 * 1074 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1075 * Function (TSF) timer when the frame containing the channel switch 1076 * announcement was received. This is simply the rx.mactime parameter 1077 * the driver passed into mac80211. 1078 * @block_tx: Indicates whether transmission must be blocked before the 1079 * scheduled channel switch, as indicated by the AP. 1080 * @chandef: the new channel to switch to 1081 * @count: the number of TBTT's until the channel switch event 1082 */ 1083struct ieee80211_channel_switch { 1084 u64 timestamp; 1085 bool block_tx; 1086 struct cfg80211_chan_def chandef; 1087 u8 count; 1088}; 1089 1090/** 1091 * enum ieee80211_vif_flags - virtual interface flags 1092 * 1093 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1094 * on this virtual interface to avoid unnecessary CPU wakeups 1095 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1096 * monitoring on this virtual interface -- i.e. it can monitor 1097 * connection quality related parameters, such as the RSSI level and 1098 * provide notifications if configured trigger levels are reached. 1099 */ 1100enum ieee80211_vif_flags { 1101 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1102 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1103}; 1104 1105/** 1106 * struct ieee80211_vif - per-interface data 1107 * 1108 * Data in this structure is continually present for driver 1109 * use during the life of a virtual interface. 1110 * 1111 * @type: type of this virtual interface 1112 * @bss_conf: BSS configuration for this interface, either our own 1113 * or the BSS we're associated to 1114 * @addr: address of this interface 1115 * @p2p: indicates whether this AP or STA interface is a p2p 1116 * interface, i.e. a GO or p2p-sta respectively 1117 * @csa_active: marks whether a channel switch is going on 1118 * @driver_flags: flags/capabilities the driver has for this interface, 1119 * these need to be set (or cleared) when the interface is added 1120 * or, if supported by the driver, the interface type is changed 1121 * at runtime, mac80211 will never touch this field 1122 * @hw_queue: hardware queue for each AC 1123 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1124 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1125 * when it is not assigned. This pointer is RCU-protected due to the TX 1126 * path needing to access it; even though the netdev carrier will always 1127 * be off when it is %NULL there can still be races and packets could be 1128 * processed after it switches back to %NULL. 1129 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1130 * interface debug files. Note that it will be NULL for the virtual 1131 * monitor interface (if that is requested.) 1132 * @drv_priv: data area for driver use, will always be aligned to 1133 * sizeof(void *). 1134 */ 1135struct ieee80211_vif { 1136 enum nl80211_iftype type; 1137 struct ieee80211_bss_conf bss_conf; 1138 u8 addr[ETH_ALEN]; 1139 bool p2p; 1140 bool csa_active; 1141 1142 u8 cab_queue; 1143 u8 hw_queue[IEEE80211_NUM_ACS]; 1144 1145 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1146 1147 u32 driver_flags; 1148 1149#ifdef CONFIG_MAC80211_DEBUGFS 1150 struct dentry *debugfs_dir; 1151#endif 1152 1153 /* must be last */ 1154 u8 drv_priv[0] __aligned(sizeof(void *)); 1155}; 1156 1157static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1158{ 1159#ifdef CONFIG_MAC80211_MESH 1160 return vif->type == NL80211_IFTYPE_MESH_POINT; 1161#endif 1162 return false; 1163} 1164 1165/** 1166 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1167 * @wdev: the wdev to get the vif for 1168 * 1169 * This can be used by mac80211 drivers with direct cfg80211 APIs 1170 * (like the vendor commands) that get a wdev. 1171 * 1172 * Note that this function may return %NULL if the given wdev isn't 1173 * associated with a vif that the driver knows about (e.g. monitor 1174 * or AP_VLAN interfaces.) 1175 */ 1176struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1177 1178/** 1179 * enum ieee80211_key_flags - key flags 1180 * 1181 * These flags are used for communication about keys between the driver 1182 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1183 * 1184 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1185 * driver to indicate that it requires IV generation for this 1186 * particular key. 1187 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1188 * the driver for a TKIP key if it requires Michael MIC 1189 * generation in software. 1190 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1191 * that the key is pairwise rather then a shared key. 1192 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1193 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1194 * be done in software. 1195 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1196 * if space should be prepared for the IV, but the IV 1197 * itself should not be generated. Do not set together with 1198 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1199 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1200 * management frames. The flag can help drivers that have a hardware 1201 * crypto implementation that doesn't deal with management frames 1202 * properly by allowing them to not upload the keys to hardware and 1203 * fall back to software crypto. Note that this flag deals only with 1204 * RX, if your crypto engine can't deal with TX you can also set the 1205 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1206 */ 1207enum ieee80211_key_flags { 1208 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1209 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1210 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1211 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1212 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1213 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1214}; 1215 1216/** 1217 * struct ieee80211_key_conf - key information 1218 * 1219 * This key information is given by mac80211 to the driver by 1220 * the set_key() callback in &struct ieee80211_ops. 1221 * 1222 * @hw_key_idx: To be set by the driver, this is the key index the driver 1223 * wants to be given when a frame is transmitted and needs to be 1224 * encrypted in hardware. 1225 * @cipher: The key's cipher suite selector. 1226 * @flags: key flags, see &enum ieee80211_key_flags. 1227 * @keyidx: the key index (0-3) 1228 * @keylen: key material length 1229 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1230 * data block: 1231 * - Temporal Encryption Key (128 bits) 1232 * - Temporal Authenticator Tx MIC Key (64 bits) 1233 * - Temporal Authenticator Rx MIC Key (64 bits) 1234 * @icv_len: The ICV length for this key type 1235 * @iv_len: The IV length for this key type 1236 */ 1237struct ieee80211_key_conf { 1238 u32 cipher; 1239 u8 icv_len; 1240 u8 iv_len; 1241 u8 hw_key_idx; 1242 u8 flags; 1243 s8 keyidx; 1244 u8 keylen; 1245 u8 key[0]; 1246}; 1247 1248/** 1249 * struct ieee80211_cipher_scheme - cipher scheme 1250 * 1251 * This structure contains a cipher scheme information defining 1252 * the secure packet crypto handling. 1253 * 1254 * @cipher: a cipher suite selector 1255 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1256 * @hdr_len: a length of a security header used the cipher 1257 * @pn_len: a length of a packet number in the security header 1258 * @pn_off: an offset of pn from the beginning of the security header 1259 * @key_idx_off: an offset of key index byte in the security header 1260 * @key_idx_mask: a bit mask of key_idx bits 1261 * @key_idx_shift: a bit shift needed to get key_idx 1262 * key_idx value calculation: 1263 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1264 * @mic_len: a mic length in bytes 1265 */ 1266struct ieee80211_cipher_scheme { 1267 u32 cipher; 1268 u16 iftype; 1269 u8 hdr_len; 1270 u8 pn_len; 1271 u8 pn_off; 1272 u8 key_idx_off; 1273 u8 key_idx_mask; 1274 u8 key_idx_shift; 1275 u8 mic_len; 1276}; 1277 1278/** 1279 * enum set_key_cmd - key command 1280 * 1281 * Used with the set_key() callback in &struct ieee80211_ops, this 1282 * indicates whether a key is being removed or added. 1283 * 1284 * @SET_KEY: a key is set 1285 * @DISABLE_KEY: a key must be disabled 1286 */ 1287enum set_key_cmd { 1288 SET_KEY, DISABLE_KEY, 1289}; 1290 1291/** 1292 * enum ieee80211_sta_state - station state 1293 * 1294 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1295 * this is a special state for add/remove transitions 1296 * @IEEE80211_STA_NONE: station exists without special state 1297 * @IEEE80211_STA_AUTH: station is authenticated 1298 * @IEEE80211_STA_ASSOC: station is associated 1299 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1300 */ 1301enum ieee80211_sta_state { 1302 /* NOTE: These need to be ordered correctly! */ 1303 IEEE80211_STA_NOTEXIST, 1304 IEEE80211_STA_NONE, 1305 IEEE80211_STA_AUTH, 1306 IEEE80211_STA_ASSOC, 1307 IEEE80211_STA_AUTHORIZED, 1308}; 1309 1310/** 1311 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1312 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1313 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1314 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1315 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1316 * (including 80+80 MHz) 1317 * 1318 * Implementation note: 20 must be zero to be initialized 1319 * correctly, the values must be sorted. 1320 */ 1321enum ieee80211_sta_rx_bandwidth { 1322 IEEE80211_STA_RX_BW_20 = 0, 1323 IEEE80211_STA_RX_BW_40, 1324 IEEE80211_STA_RX_BW_80, 1325 IEEE80211_STA_RX_BW_160, 1326}; 1327 1328/** 1329 * struct ieee80211_sta_rates - station rate selection table 1330 * 1331 * @rcu_head: RCU head used for freeing the table on update 1332 * @rate: transmit rates/flags to be used by default. 1333 * Overriding entries per-packet is possible by using cb tx control. 1334 */ 1335struct ieee80211_sta_rates { 1336 struct rcu_head rcu_head; 1337 struct { 1338 s8 idx; 1339 u8 count; 1340 u8 count_cts; 1341 u8 count_rts; 1342 u16 flags; 1343 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1344}; 1345 1346/** 1347 * struct ieee80211_sta - station table entry 1348 * 1349 * A station table entry represents a station we are possibly 1350 * communicating with. Since stations are RCU-managed in 1351 * mac80211, any ieee80211_sta pointer you get access to must 1352 * either be protected by rcu_read_lock() explicitly or implicitly, 1353 * or you must take good care to not use such a pointer after a 1354 * call to your sta_remove callback that removed it. 1355 * 1356 * @addr: MAC address 1357 * @aid: AID we assigned to the station if we're an AP 1358 * @supp_rates: Bitmap of supported rates (per band) 1359 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1360 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1361 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1362 * @drv_priv: data area for driver use, will always be aligned to 1363 * sizeof(void *), size is determined in hw information. 1364 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1365 * if wme is supported. 1366 * @max_sp: max Service Period. Only valid if wme is supported. 1367 * @bandwidth: current bandwidth the station can receive with 1368 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1369 * station can receive at the moment, changed by operating mode 1370 * notifications and capabilities. The value is only valid after 1371 * the station moves to associated state. 1372 * @smps_mode: current SMPS mode (off, static or dynamic) 1373 * @rates: rate control selection table 1374 */ 1375struct ieee80211_sta { 1376 u32 supp_rates[IEEE80211_NUM_BANDS]; 1377 u8 addr[ETH_ALEN]; 1378 u16 aid; 1379 struct ieee80211_sta_ht_cap ht_cap; 1380 struct ieee80211_sta_vht_cap vht_cap; 1381 bool wme; 1382 u8 uapsd_queues; 1383 u8 max_sp; 1384 u8 rx_nss; 1385 enum ieee80211_sta_rx_bandwidth bandwidth; 1386 enum ieee80211_smps_mode smps_mode; 1387 struct ieee80211_sta_rates __rcu *rates; 1388 1389 /* must be last */ 1390 u8 drv_priv[0] __aligned(sizeof(void *)); 1391}; 1392 1393/** 1394 * enum sta_notify_cmd - sta notify command 1395 * 1396 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1397 * indicates if an associated station made a power state transition. 1398 * 1399 * @STA_NOTIFY_SLEEP: a station is now sleeping 1400 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1401 */ 1402enum sta_notify_cmd { 1403 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1404}; 1405 1406/** 1407 * struct ieee80211_tx_control - TX control data 1408 * 1409 * @sta: station table entry, this sta pointer may be NULL and 1410 * it is not allowed to copy the pointer, due to RCU. 1411 */ 1412struct ieee80211_tx_control { 1413 struct ieee80211_sta *sta; 1414}; 1415 1416/** 1417 * enum ieee80211_hw_flags - hardware flags 1418 * 1419 * These flags are used to indicate hardware capabilities to 1420 * the stack. Generally, flags here should have their meaning 1421 * done in a way that the simplest hardware doesn't need setting 1422 * any particular flags. There are some exceptions to this rule, 1423 * however, so you are advised to review these flags carefully. 1424 * 1425 * @IEEE80211_HW_HAS_RATE_CONTROL: 1426 * The hardware or firmware includes rate control, and cannot be 1427 * controlled by the stack. As such, no rate control algorithm 1428 * should be instantiated, and the TX rate reported to userspace 1429 * will be taken from the TX status instead of the rate control 1430 * algorithm. 1431 * Note that this requires that the driver implement a number of 1432 * callbacks so it has the correct information, it needs to have 1433 * the @set_rts_threshold callback and must look at the BSS config 1434 * @use_cts_prot for G/N protection, @use_short_slot for slot 1435 * timing in 2.4 GHz and @use_short_preamble for preambles for 1436 * CCK frames. 1437 * 1438 * @IEEE80211_HW_RX_INCLUDES_FCS: 1439 * Indicates that received frames passed to the stack include 1440 * the FCS at the end. 1441 * 1442 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1443 * Some wireless LAN chipsets buffer broadcast/multicast frames 1444 * for power saving stations in the hardware/firmware and others 1445 * rely on the host system for such buffering. This option is used 1446 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1447 * multicast frames when there are power saving stations so that 1448 * the driver can fetch them with ieee80211_get_buffered_bc(). 1449 * 1450 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1451 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1452 * 1453 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1454 * Hardware is not capable of receiving frames with short preamble on 1455 * the 2.4 GHz band. 1456 * 1457 * @IEEE80211_HW_SIGNAL_UNSPEC: 1458 * Hardware can provide signal values but we don't know its units. We 1459 * expect values between 0 and @max_signal. 1460 * If possible please provide dB or dBm instead. 1461 * 1462 * @IEEE80211_HW_SIGNAL_DBM: 1463 * Hardware gives signal values in dBm, decibel difference from 1464 * one milliwatt. This is the preferred method since it is standardized 1465 * between different devices. @max_signal does not need to be set. 1466 * 1467 * @IEEE80211_HW_SPECTRUM_MGMT: 1468 * Hardware supports spectrum management defined in 802.11h 1469 * Measurement, Channel Switch, Quieting, TPC 1470 * 1471 * @IEEE80211_HW_AMPDU_AGGREGATION: 1472 * Hardware supports 11n A-MPDU aggregation. 1473 * 1474 * @IEEE80211_HW_SUPPORTS_PS: 1475 * Hardware has power save support (i.e. can go to sleep). 1476 * 1477 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1478 * Hardware requires nullfunc frame handling in stack, implies 1479 * stack support for dynamic PS. 1480 * 1481 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1482 * Hardware has support for dynamic PS. 1483 * 1484 * @IEEE80211_HW_MFP_CAPABLE: 1485 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1486 * 1487 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1488 * Hardware supports static spatial multiplexing powersave, 1489 * ie. can turn off all but one chain even on HT connections 1490 * that should be using more chains. 1491 * 1492 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1493 * Hardware supports dynamic spatial multiplexing powersave, 1494 * ie. can turn off all but one chain and then wake the rest 1495 * up as required after, for example, rts/cts handshake. 1496 * 1497 * @IEEE80211_HW_SUPPORTS_UAPSD: 1498 * Hardware supports Unscheduled Automatic Power Save Delivery 1499 * (U-APSD) in managed mode. The mode is configured with 1500 * conf_tx() operation. 1501 * 1502 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1503 * Hardware can provide ack status reports of Tx frames to 1504 * the stack. 1505 * 1506 * @IEEE80211_HW_CONNECTION_MONITOR: 1507 * The hardware performs its own connection monitoring, including 1508 * periodic keep-alives to the AP and probing the AP on beacon loss. 1509 * When this flag is set, signaling beacon-loss will cause an immediate 1510 * change to disassociated state. 1511 * 1512 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1513 * This device needs to get data from beacon before association (i.e. 1514 * dtim_period). 1515 * 1516 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1517 * per-station GTKs as used by IBSS RSN or during fast transition. If 1518 * the device doesn't support per-station GTKs, but can be asked not 1519 * to decrypt group addressed frames, then IBSS RSN support is still 1520 * possible but software crypto will be used. Advertise the wiphy flag 1521 * only in that case. 1522 * 1523 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1524 * autonomously manages the PS status of connected stations. When 1525 * this flag is set mac80211 will not trigger PS mode for connected 1526 * stations based on the PM bit of incoming frames. 1527 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1528 * the PS mode of connected stations. 1529 * 1530 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1531 * setup strictly in HW. mac80211 should not attempt to do this in 1532 * software. 1533 * 1534 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1535 * a virtual monitor interface when monitor interfaces are the only 1536 * active interfaces. 1537 * 1538 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1539 * queue mapping in order to use different queues (not just one per AC) 1540 * for different virtual interfaces. See the doc section on HW queue 1541 * control for more details. 1542 * 1543 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1544 * selection table provided by the rate control algorithm. 1545 * 1546 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1547 * P2P Interface. This will be honoured even if more than one interface 1548 * is supported. 1549 * 1550 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1551 * only, to allow getting TBTT of a DTIM beacon. 1552 * 1553 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1554 * and can cope with CCK rates in an aggregation session (e.g. by not 1555 * using aggregation for such frames.) 1556 * 1557 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1558 * for a single active channel while using channel contexts. When support 1559 * is not enabled the default action is to disconnect when getting the 1560 * CSA frame. 1561 */ 1562enum ieee80211_hw_flags { 1563 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1564 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1565 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1566 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1567 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1568 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1569 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1570 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1571 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1572 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1573 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1574 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1575 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1576 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1577 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1578 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1579 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1580 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1581 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1582 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1583 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1584 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1585 IEEE80211_HW_AP_LINK_PS = 1<<22, 1586 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1587 IEEE80211_HW_SUPPORTS_RC_TABLE = 1<<24, 1588 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1589 IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, 1590 IEEE80211_HW_SUPPORTS_HT_CCK_RATES = 1<<27, 1591 IEEE80211_HW_CHANCTX_STA_CSA = 1<<28, 1592}; 1593 1594/** 1595 * struct ieee80211_hw - hardware information and state 1596 * 1597 * This structure contains the configuration and hardware 1598 * information for an 802.11 PHY. 1599 * 1600 * @wiphy: This points to the &struct wiphy allocated for this 1601 * 802.11 PHY. You must fill in the @perm_addr and @dev 1602 * members of this structure using SET_IEEE80211_DEV() 1603 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1604 * bands (with channels, bitrates) are registered here. 1605 * 1606 * @conf: &struct ieee80211_conf, device configuration, don't use. 1607 * 1608 * @priv: pointer to private area that was allocated for driver use 1609 * along with this structure. 1610 * 1611 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1612 * 1613 * @extra_tx_headroom: headroom to reserve in each transmit skb 1614 * for use by the driver (e.g. for transmit headers.) 1615 * 1616 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 1617 * Can be used by drivers to add extra IEs. 1618 * 1619 * @max_signal: Maximum value for signal (rssi) in RX information, used 1620 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1621 * 1622 * @max_listen_interval: max listen interval in units of beacon interval 1623 * that HW supports 1624 * 1625 * @queues: number of available hardware transmit queues for 1626 * data packets. WMM/QoS requires at least four, these 1627 * queues need to have configurable access parameters. 1628 * 1629 * @rate_control_algorithm: rate control algorithm for this hardware. 1630 * If unset (NULL), the default algorithm will be used. Must be 1631 * set before calling ieee80211_register_hw(). 1632 * 1633 * @vif_data_size: size (in bytes) of the drv_priv data area 1634 * within &struct ieee80211_vif. 1635 * @sta_data_size: size (in bytes) of the drv_priv data area 1636 * within &struct ieee80211_sta. 1637 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1638 * within &struct ieee80211_chanctx_conf. 1639 * 1640 * @max_rates: maximum number of alternate rate retry stages the hw 1641 * can handle. 1642 * @max_report_rates: maximum number of alternate rate retry stages 1643 * the hw can report back. 1644 * @max_rate_tries: maximum number of tries for each stage 1645 * 1646 * @napi_weight: weight used for NAPI polling. You must specify an 1647 * appropriate value here if a napi_poll operation is provided 1648 * by your driver. 1649 * 1650 * @max_rx_aggregation_subframes: maximum buffer size (number of 1651 * sub-frames) to be used for A-MPDU block ack receiver 1652 * aggregation. 1653 * This is only relevant if the device has restrictions on the 1654 * number of subframes, if it relies on mac80211 to do reordering 1655 * it shouldn't be set. 1656 * 1657 * @max_tx_aggregation_subframes: maximum number of subframes in an 1658 * aggregate an HT driver will transmit, used by the peer as a 1659 * hint to size its reorder buffer. 1660 * 1661 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1662 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1663 * 1664 * @radiotap_mcs_details: lists which MCS information can the HW 1665 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1666 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1667 * adding _BW is supported today. 1668 * 1669 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1670 * the default is _GI | _BANDWIDTH. 1671 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1672 * 1673 * @netdev_features: netdev features to be set in each netdev created 1674 * from this HW. Note only HW checksum features are currently 1675 * compatible with mac80211. Other feature bits will be rejected. 1676 * 1677 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 1678 * for each access category if it is uAPSD trigger-enabled and delivery- 1679 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 1680 * Each bit corresponds to different AC. Value '1' in specific bit means 1681 * that corresponding AC is both trigger- and delivery-enabled. '0' means 1682 * neither enabled. 1683 * 1684 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 1685 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 1686 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 1687 * 1688 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 1689 * @cipher_schemes: a pointer to an array of cipher scheme definitions 1690 * supported by HW. 1691 */ 1692struct ieee80211_hw { 1693 struct ieee80211_conf conf; 1694 struct wiphy *wiphy; 1695 const char *rate_control_algorithm; 1696 void *priv; 1697 u32 flags; 1698 unsigned int extra_tx_headroom; 1699 unsigned int extra_beacon_tailroom; 1700 int vif_data_size; 1701 int sta_data_size; 1702 int chanctx_data_size; 1703 int napi_weight; 1704 u16 queues; 1705 u16 max_listen_interval; 1706 s8 max_signal; 1707 u8 max_rates; 1708 u8 max_report_rates; 1709 u8 max_rate_tries; 1710 u8 max_rx_aggregation_subframes; 1711 u8 max_tx_aggregation_subframes; 1712 u8 offchannel_tx_hw_queue; 1713 u8 radiotap_mcs_details; 1714 u16 radiotap_vht_details; 1715 netdev_features_t netdev_features; 1716 u8 uapsd_queues; 1717 u8 uapsd_max_sp_len; 1718 u8 n_cipher_schemes; 1719 const struct ieee80211_cipher_scheme *cipher_schemes; 1720}; 1721 1722/** 1723 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1724 * 1725 * @wiphy: the &struct wiphy which we want to query 1726 * 1727 * mac80211 drivers can use this to get to their respective 1728 * &struct ieee80211_hw. Drivers wishing to get to their own private 1729 * structure can then access it via hw->priv. Note that mac802111 drivers should 1730 * not use wiphy_priv() to try to get their private driver structure as this 1731 * is already used internally by mac80211. 1732 * 1733 * Return: The mac80211 driver hw struct of @wiphy. 1734 */ 1735struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1736 1737/** 1738 * SET_IEEE80211_DEV - set device for 802.11 hardware 1739 * 1740 * @hw: the &struct ieee80211_hw to set the device for 1741 * @dev: the &struct device of this 802.11 device 1742 */ 1743static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1744{ 1745 set_wiphy_dev(hw->wiphy, dev); 1746} 1747 1748/** 1749 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1750 * 1751 * @hw: the &struct ieee80211_hw to set the MAC address for 1752 * @addr: the address to set 1753 */ 1754static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1755{ 1756 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1757} 1758 1759static inline struct ieee80211_rate * 1760ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1761 const struct ieee80211_tx_info *c) 1762{ 1763 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1764 return NULL; 1765 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1766} 1767 1768static inline struct ieee80211_rate * 1769ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1770 const struct ieee80211_tx_info *c) 1771{ 1772 if (c->control.rts_cts_rate_idx < 0) 1773 return NULL; 1774 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1775} 1776 1777static inline struct ieee80211_rate * 1778ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1779 const struct ieee80211_tx_info *c, int idx) 1780{ 1781 if (c->control.rates[idx + 1].idx < 0) 1782 return NULL; 1783 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1784} 1785 1786/** 1787 * ieee80211_free_txskb - free TX skb 1788 * @hw: the hardware 1789 * @skb: the skb 1790 * 1791 * Free a transmit skb. Use this funtion when some failure 1792 * to transmit happened and thus status cannot be reported. 1793 */ 1794void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1795 1796/** 1797 * DOC: Hardware crypto acceleration 1798 * 1799 * mac80211 is capable of taking advantage of many hardware 1800 * acceleration designs for encryption and decryption operations. 1801 * 1802 * The set_key() callback in the &struct ieee80211_ops for a given 1803 * device is called to enable hardware acceleration of encryption and 1804 * decryption. The callback takes a @sta parameter that will be NULL 1805 * for default keys or keys used for transmission only, or point to 1806 * the station information for the peer for individual keys. 1807 * Multiple transmission keys with the same key index may be used when 1808 * VLANs are configured for an access point. 1809 * 1810 * When transmitting, the TX control data will use the @hw_key_idx 1811 * selected by the driver by modifying the &struct ieee80211_key_conf 1812 * pointed to by the @key parameter to the set_key() function. 1813 * 1814 * The set_key() call for the %SET_KEY command should return 0 if 1815 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1816 * added; if you return 0 then hw_key_idx must be assigned to the 1817 * hardware key index, you are free to use the full u8 range. 1818 * 1819 * When the cmd is %DISABLE_KEY then it must succeed. 1820 * 1821 * Note that it is permissible to not decrypt a frame even if a key 1822 * for it has been uploaded to hardware, the stack will not make any 1823 * decision based on whether a key has been uploaded or not but rather 1824 * based on the receive flags. 1825 * 1826 * The &struct ieee80211_key_conf structure pointed to by the @key 1827 * parameter is guaranteed to be valid until another call to set_key() 1828 * removes it, but it can only be used as a cookie to differentiate 1829 * keys. 1830 * 1831 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1832 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1833 * handler. 1834 * The update_tkip_key() call updates the driver with the new phase 1 key. 1835 * This happens every time the iv16 wraps around (every 65536 packets). The 1836 * set_key() call will happen only once for each key (unless the AP did 1837 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1838 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1839 * handler is software decryption with wrap around of iv16. 1840 * 1841 * The set_default_unicast_key() call updates the default WEP key index 1842 * configured to the hardware for WEP encryption type. This is required 1843 * for devices that support offload of data packets (e.g. ARP responses). 1844 */ 1845 1846/** 1847 * DOC: Powersave support 1848 * 1849 * mac80211 has support for various powersave implementations. 1850 * 1851 * First, it can support hardware that handles all powersaving by itself, 1852 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1853 * flag. In that case, it will be told about the desired powersave mode 1854 * with the %IEEE80211_CONF_PS flag depending on the association status. 1855 * The hardware must take care of sending nullfunc frames when necessary, 1856 * i.e. when entering and leaving powersave mode. The hardware is required 1857 * to look at the AID in beacons and signal to the AP that it woke up when 1858 * it finds traffic directed to it. 1859 * 1860 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1861 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1862 * with hardware wakeup and sleep states. Driver is responsible for waking 1863 * up the hardware before issuing commands to the hardware and putting it 1864 * back to sleep at appropriate times. 1865 * 1866 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1867 * buffered multicast/broadcast frames after the beacon. Also it must be 1868 * possible to send frames and receive the acknowledment frame. 1869 * 1870 * Other hardware designs cannot send nullfunc frames by themselves and also 1871 * need software support for parsing the TIM bitmap. This is also supported 1872 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1873 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1874 * required to pass up beacons. The hardware is still required to handle 1875 * waking up for multicast traffic; if it cannot the driver must handle that 1876 * as best as it can, mac80211 is too slow to do that. 1877 * 1878 * Dynamic powersave is an extension to normal powersave in which the 1879 * hardware stays awake for a user-specified period of time after sending a 1880 * frame so that reply frames need not be buffered and therefore delayed to 1881 * the next wakeup. It's compromise of getting good enough latency when 1882 * there's data traffic and still saving significantly power in idle 1883 * periods. 1884 * 1885 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1886 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1887 * flag and mac80211 will handle everything automatically. Additionally, 1888 * hardware having support for the dynamic PS feature may set the 1889 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1890 * dynamic PS mode itself. The driver needs to look at the 1891 * @dynamic_ps_timeout hardware configuration value and use it that value 1892 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1893 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1894 * enabled whenever user has enabled powersave. 1895 * 1896 * Driver informs U-APSD client support by enabling 1897 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1898 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1899 * Nullfunc frames and stay awake until the service period has ended. To 1900 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1901 * from that AC are transmitted with powersave enabled. 1902 * 1903 * Note: U-APSD client mode is not yet supported with 1904 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1905 */ 1906 1907/** 1908 * DOC: Beacon filter support 1909 * 1910 * Some hardware have beacon filter support to reduce host cpu wakeups 1911 * which will reduce system power consumption. It usually works so that 1912 * the firmware creates a checksum of the beacon but omits all constantly 1913 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1914 * beacon is forwarded to the host, otherwise it will be just dropped. That 1915 * way the host will only receive beacons where some relevant information 1916 * (for example ERP protection or WMM settings) have changed. 1917 * 1918 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1919 * interface capability. The driver needs to enable beacon filter support 1920 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1921 * power save is enabled, the stack will not check for beacon loss and the 1922 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1923 * 1924 * The time (or number of beacons missed) until the firmware notifies the 1925 * driver of a beacon loss event (which in turn causes the driver to call 1926 * ieee80211_beacon_loss()) should be configurable and will be controlled 1927 * by mac80211 and the roaming algorithm in the future. 1928 * 1929 * Since there may be constantly changing information elements that nothing 1930 * in the software stack cares about, we will, in the future, have mac80211 1931 * tell the driver which information elements are interesting in the sense 1932 * that we want to see changes in them. This will include 1933 * - a list of information element IDs 1934 * - a list of OUIs for the vendor information element 1935 * 1936 * Ideally, the hardware would filter out any beacons without changes in the 1937 * requested elements, but if it cannot support that it may, at the expense 1938 * of some efficiency, filter out only a subset. For example, if the device 1939 * doesn't support checking for OUIs it should pass up all changes in all 1940 * vendor information elements. 1941 * 1942 * Note that change, for the sake of simplification, also includes information 1943 * elements appearing or disappearing from the beacon. 1944 * 1945 * Some hardware supports an "ignore list" instead, just make sure nothing 1946 * that was requested is on the ignore list, and include commonly changing 1947 * information element IDs in the ignore list, for example 11 (BSS load) and 1948 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1949 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1950 * it could also include some currently unused IDs. 1951 * 1952 * 1953 * In addition to these capabilities, hardware should support notifying the 1954 * host of changes in the beacon RSSI. This is relevant to implement roaming 1955 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1956 * the received data packets). This can consist in notifying the host when 1957 * the RSSI changes significantly or when it drops below or rises above 1958 * configurable thresholds. In the future these thresholds will also be 1959 * configured by mac80211 (which gets them from userspace) to implement 1960 * them as the roaming algorithm requires. 1961 * 1962 * If the hardware cannot implement this, the driver should ask it to 1963 * periodically pass beacon frames to the host so that software can do the 1964 * signal strength threshold checking. 1965 */ 1966 1967/** 1968 * DOC: Spatial multiplexing power save 1969 * 1970 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1971 * power in an 802.11n implementation. For details on the mechanism 1972 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1973 * "11.2.3 SM power save". 1974 * 1975 * The mac80211 implementation is capable of sending action frames 1976 * to update the AP about the station's SMPS mode, and will instruct 1977 * the driver to enter the specific mode. It will also announce the 1978 * requested SMPS mode during the association handshake. Hardware 1979 * support for this feature is required, and can be indicated by 1980 * hardware flags. 1981 * 1982 * The default mode will be "automatic", which nl80211/cfg80211 1983 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1984 * turned off otherwise. 1985 * 1986 * To support this feature, the driver must set the appropriate 1987 * hardware support flags, and handle the SMPS flag to the config() 1988 * operation. It will then with this mechanism be instructed to 1989 * enter the requested SMPS mode while associated to an HT AP. 1990 */ 1991 1992/** 1993 * DOC: Frame filtering 1994 * 1995 * mac80211 requires to see many management frames for proper 1996 * operation, and users may want to see many more frames when 1997 * in monitor mode. However, for best CPU usage and power consumption, 1998 * having as few frames as possible percolate through the stack is 1999 * desirable. Hence, the hardware should filter as much as possible. 2000 * 2001 * To achieve this, mac80211 uses filter flags (see below) to tell 2002 * the driver's configure_filter() function which frames should be 2003 * passed to mac80211 and which should be filtered out. 2004 * 2005 * Before configure_filter() is invoked, the prepare_multicast() 2006 * callback is invoked with the parameters @mc_count and @mc_list 2007 * for the combined multicast address list of all virtual interfaces. 2008 * It's use is optional, and it returns a u64 that is passed to 2009 * configure_filter(). Additionally, configure_filter() has the 2010 * arguments @changed_flags telling which flags were changed and 2011 * @total_flags with the new flag states. 2012 * 2013 * If your device has no multicast address filters your driver will 2014 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2015 * parameter to see whether multicast frames should be accepted 2016 * or dropped. 2017 * 2018 * All unsupported flags in @total_flags must be cleared. 2019 * Hardware does not support a flag if it is incapable of _passing_ 2020 * the frame to the stack. Otherwise the driver must ignore 2021 * the flag, but not clear it. 2022 * You must _only_ clear the flag (announce no support for the 2023 * flag to mac80211) if you are not able to pass the packet type 2024 * to the stack (so the hardware always filters it). 2025 * So for example, you should clear @FIF_CONTROL, if your hardware 2026 * always filters control frames. If your hardware always passes 2027 * control frames to the kernel and is incapable of filtering them, 2028 * you do _not_ clear the @FIF_CONTROL flag. 2029 * This rule applies to all other FIF flags as well. 2030 */ 2031 2032/** 2033 * DOC: AP support for powersaving clients 2034 * 2035 * In order to implement AP and P2P GO modes, mac80211 has support for 2036 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2037 * There currently is no support for sAPSD. 2038 * 2039 * There is one assumption that mac80211 makes, namely that a client 2040 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2041 * Both are supported, and both can be used by the same client, but 2042 * they can't be used concurrently by the same client. This simplifies 2043 * the driver code. 2044 * 2045 * The first thing to keep in mind is that there is a flag for complete 2046 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2047 * mac80211 expects the driver to handle most of the state machine for 2048 * powersaving clients and will ignore the PM bit in incoming frames. 2049 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2050 * stations' powersave transitions. In this mode, mac80211 also doesn't 2051 * handle PS-Poll/uAPSD. 2052 * 2053 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2054 * PM bit in incoming frames for client powersave transitions. When a 2055 * station goes to sleep, we will stop transmitting to it. There is, 2056 * however, a race condition: a station might go to sleep while there is 2057 * data buffered on hardware queues. If the device has support for this 2058 * it will reject frames, and the driver should give the frames back to 2059 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2060 * cause mac80211 to retry the frame when the station wakes up. The 2061 * driver is also notified of powersave transitions by calling its 2062 * @sta_notify callback. 2063 * 2064 * When the station is asleep, it has three choices: it can wake up, 2065 * it can PS-Poll, or it can possibly start a uAPSD service period. 2066 * Waking up is implemented by simply transmitting all buffered (and 2067 * filtered) frames to the station. This is the easiest case. When 2068 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2069 * will inform the driver of this with the @allow_buffered_frames 2070 * callback; this callback is optional. mac80211 will then transmit 2071 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2072 * on each frame. The last frame in the service period (or the only 2073 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2074 * indicate that it ends the service period; as this frame must have 2075 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2076 * When TX status is reported for this frame, the service period is 2077 * marked has having ended and a new one can be started by the peer. 2078 * 2079 * Additionally, non-bufferable MMPDUs can also be transmitted by 2080 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2081 * 2082 * Another race condition can happen on some devices like iwlwifi 2083 * when there are frames queued for the station and it wakes up 2084 * or polls; the frames that are already queued could end up being 2085 * transmitted first instead, causing reordering and/or wrong 2086 * processing of the EOSP. The cause is that allowing frames to be 2087 * transmitted to a certain station is out-of-band communication to 2088 * the device. To allow this problem to be solved, the driver can 2089 * call ieee80211_sta_block_awake() if frames are buffered when it 2090 * is notified that the station went to sleep. When all these frames 2091 * have been filtered (see above), it must call the function again 2092 * to indicate that the station is no longer blocked. 2093 * 2094 * If the driver buffers frames in the driver for aggregation in any 2095 * way, it must use the ieee80211_sta_set_buffered() call when it is 2096 * notified of the station going to sleep to inform mac80211 of any 2097 * TIDs that have frames buffered. Note that when a station wakes up 2098 * this information is reset (hence the requirement to call it when 2099 * informed of the station going to sleep). Then, when a service 2100 * period starts for any reason, @release_buffered_frames is called 2101 * with the number of frames to be released and which TIDs they are 2102 * to come from. In this case, the driver is responsible for setting 2103 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2104 * to help the @more_data paramter is passed to tell the driver if 2105 * there is more data on other TIDs -- the TIDs to release frames 2106 * from are ignored since mac80211 doesn't know how many frames the 2107 * buffers for those TIDs contain. 2108 * 2109 * If the driver also implement GO mode, where absence periods may 2110 * shorten service periods (or abort PS-Poll responses), it must 2111 * filter those response frames except in the case of frames that 2112 * are buffered in the driver -- those must remain buffered to avoid 2113 * reordering. Because it is possible that no frames are released 2114 * in this case, the driver must call ieee80211_sta_eosp() 2115 * to indicate to mac80211 that the service period ended anyway. 2116 * 2117 * Finally, if frames from multiple TIDs are released from mac80211 2118 * but the driver might reorder them, it must clear & set the flags 2119 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2120 * and also take care of the EOSP and MORE_DATA bits in the frame. 2121 * The driver may also use ieee80211_sta_eosp() in this case. 2122 */ 2123 2124/** 2125 * DOC: HW queue control 2126 * 2127 * Before HW queue control was introduced, mac80211 only had a single static 2128 * assignment of per-interface AC software queues to hardware queues. This 2129 * was problematic for a few reasons: 2130 * 1) off-channel transmissions might get stuck behind other frames 2131 * 2) multiple virtual interfaces couldn't be handled correctly 2132 * 3) after-DTIM frames could get stuck behind other frames 2133 * 2134 * To solve this, hardware typically uses multiple different queues for all 2135 * the different usages, and this needs to be propagated into mac80211 so it 2136 * won't have the same problem with the software queues. 2137 * 2138 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2139 * flag that tells it that the driver implements its own queue control. To do 2140 * so, the driver will set up the various queues in each &struct ieee80211_vif 2141 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2142 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2143 * if necessary will queue the frame on the right software queue that mirrors 2144 * the hardware queue. 2145 * Additionally, the driver has to then use these HW queue IDs for the queue 2146 * management functions (ieee80211_stop_queue() et al.) 2147 * 2148 * The driver is free to set up the queue mappings as needed, multiple virtual 2149 * interfaces may map to the same hardware queues if needed. The setup has to 2150 * happen during add_interface or change_interface callbacks. For example, a 2151 * driver supporting station+station and station+AP modes might decide to have 2152 * 10 hardware queues to handle different scenarios: 2153 * 2154 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2155 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2156 * after-DTIM queue for AP: 8 2157 * off-channel queue: 9 2158 * 2159 * It would then set up the hardware like this: 2160 * hw.offchannel_tx_hw_queue = 9 2161 * 2162 * and the first virtual interface that is added as follows: 2163 * vif.hw_queue[IEEE80211_AC_VO] = 0 2164 * vif.hw_queue[IEEE80211_AC_VI] = 1 2165 * vif.hw_queue[IEEE80211_AC_BE] = 2 2166 * vif.hw_queue[IEEE80211_AC_BK] = 3 2167 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2168 * and the second virtual interface with 4-7. 2169 * 2170 * If queue 6 gets full, for example, mac80211 would only stop the second 2171 * virtual interface's BE queue since virtual interface queues are per AC. 2172 * 2173 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2174 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2175 * queue could potentially be shared since mac80211 will look at cab_queue when 2176 * a queue is stopped/woken even if the interface is not in AP mode. 2177 */ 2178 2179/** 2180 * enum ieee80211_filter_flags - hardware filter flags 2181 * 2182 * These flags determine what the filter in hardware should be 2183 * programmed to let through and what should not be passed to the 2184 * stack. It is always safe to pass more frames than requested, 2185 * but this has negative impact on power consumption. 2186 * 2187 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 2188 * think of the BSS as your network segment and then this corresponds 2189 * to the regular ethernet device promiscuous mode. 2190 * 2191 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2192 * by the user or if the hardware is not capable of filtering by 2193 * multicast address. 2194 * 2195 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2196 * %RX_FLAG_FAILED_FCS_CRC for them) 2197 * 2198 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2199 * the %RX_FLAG_FAILED_PLCP_CRC for them 2200 * 2201 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2202 * to the hardware that it should not filter beacons or probe responses 2203 * by BSSID. Filtering them can greatly reduce the amount of processing 2204 * mac80211 needs to do and the amount of CPU wakeups, so you should 2205 * honour this flag if possible. 2206 * 2207 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2208 * is not set then only those addressed to this station. 2209 * 2210 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2211 * 2212 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2213 * those addressed to this station. 2214 * 2215 * @FIF_PROBE_REQ: pass probe request frames 2216 */ 2217enum ieee80211_filter_flags { 2218 FIF_PROMISC_IN_BSS = 1<<0, 2219 FIF_ALLMULTI = 1<<1, 2220 FIF_FCSFAIL = 1<<2, 2221 FIF_PLCPFAIL = 1<<3, 2222 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2223 FIF_CONTROL = 1<<5, 2224 FIF_OTHER_BSS = 1<<6, 2225 FIF_PSPOLL = 1<<7, 2226 FIF_PROBE_REQ = 1<<8, 2227}; 2228 2229/** 2230 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2231 * 2232 * These flags are used with the ampdu_action() callback in 2233 * &struct ieee80211_ops to indicate which action is needed. 2234 * 2235 * Note that drivers MUST be able to deal with a TX aggregation 2236 * session being stopped even before they OK'ed starting it by 2237 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2238 * might receive the addBA frame and send a delBA right away! 2239 * 2240 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2241 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2242 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2243 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2244 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2245 * queued packets, now unaggregated. After all packets are transmitted the 2246 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2247 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2248 * called when the station is removed. There's no need or reason to call 2249 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2250 * session is gone and removes the station. 2251 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2252 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2253 * now the connection is dropped and the station will be removed. Drivers 2254 * should clean up and drop remaining packets when this is called. 2255 */ 2256enum ieee80211_ampdu_mlme_action { 2257 IEEE80211_AMPDU_RX_START, 2258 IEEE80211_AMPDU_RX_STOP, 2259 IEEE80211_AMPDU_TX_START, 2260 IEEE80211_AMPDU_TX_STOP_CONT, 2261 IEEE80211_AMPDU_TX_STOP_FLUSH, 2262 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2263 IEEE80211_AMPDU_TX_OPERATIONAL, 2264}; 2265 2266/** 2267 * enum ieee80211_frame_release_type - frame release reason 2268 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2269 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2270 * frame received on trigger-enabled AC 2271 */ 2272enum ieee80211_frame_release_type { 2273 IEEE80211_FRAME_RELEASE_PSPOLL, 2274 IEEE80211_FRAME_RELEASE_UAPSD, 2275}; 2276 2277/** 2278 * enum ieee80211_rate_control_changed - flags to indicate what changed 2279 * 2280 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2281 * to this station changed. The actual bandwidth is in the station 2282 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2283 * flag changes, for HT and VHT the bandwidth field changes. 2284 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2285 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2286 * changed (in IBSS mode) due to discovering more information about 2287 * the peer. 2288 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2289 * by the peer 2290 */ 2291enum ieee80211_rate_control_changed { 2292 IEEE80211_RC_BW_CHANGED = BIT(0), 2293 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2294 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2295 IEEE80211_RC_NSS_CHANGED = BIT(3), 2296}; 2297 2298/** 2299 * enum ieee80211_roc_type - remain on channel type 2300 * 2301 * With the support for multi channel contexts and multi channel operations, 2302 * remain on channel operations might be limited/deferred/aborted by other 2303 * flows/operations which have higher priority (and vise versa). 2304 * Specifying the ROC type can be used by devices to prioritize the ROC 2305 * operations compared to other operations/flows. 2306 * 2307 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2308 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2309 * for sending managment frames offchannel. 2310 */ 2311enum ieee80211_roc_type { 2312 IEEE80211_ROC_TYPE_NORMAL = 0, 2313 IEEE80211_ROC_TYPE_MGMT_TX, 2314}; 2315 2316/** 2317 * struct ieee80211_ops - callbacks from mac80211 to the driver 2318 * 2319 * This structure contains various callbacks that the driver may 2320 * handle or, in some cases, must handle, for example to configure 2321 * the hardware to a new channel or to transmit a frame. 2322 * 2323 * @tx: Handler that 802.11 module calls for each transmitted frame. 2324 * skb contains the buffer starting from the IEEE 802.11 header. 2325 * The low-level driver should send the frame out based on 2326 * configuration in the TX control data. This handler should, 2327 * preferably, never fail and stop queues appropriately. 2328 * Must be atomic. 2329 * 2330 * @start: Called before the first netdevice attached to the hardware 2331 * is enabled. This should turn on the hardware and must turn on 2332 * frame reception (for possibly enabled monitor interfaces.) 2333 * Returns negative error codes, these may be seen in userspace, 2334 * or zero. 2335 * When the device is started it should not have a MAC address 2336 * to avoid acknowledging frames before a non-monitor device 2337 * is added. 2338 * Must be implemented and can sleep. 2339 * 2340 * @stop: Called after last netdevice attached to the hardware 2341 * is disabled. This should turn off the hardware (at least 2342 * it must turn off frame reception.) 2343 * May be called right after add_interface if that rejects 2344 * an interface. If you added any work onto the mac80211 workqueue 2345 * you should ensure to cancel it on this callback. 2346 * Must be implemented and can sleep. 2347 * 2348 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2349 * stop transmitting and doing any other configuration, and then 2350 * ask the device to suspend. This is only invoked when WoWLAN is 2351 * configured, otherwise the device is deconfigured completely and 2352 * reconfigured at resume time. 2353 * The driver may also impose special conditions under which it 2354 * wants to use the "normal" suspend (deconfigure), say if it only 2355 * supports WoWLAN when the device is associated. In this case, it 2356 * must return 1 from this function. 2357 * 2358 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2359 * now resuming its operation, after this the device must be fully 2360 * functional again. If this returns an error, the only way out is 2361 * to also unregister the device. If it returns 1, then mac80211 2362 * will also go through the regular complete restart on resume. 2363 * 2364 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2365 * modified. The reason is that device_set_wakeup_enable() is 2366 * supposed to be called when the configuration changes, not only 2367 * in suspend(). 2368 * 2369 * @add_interface: Called when a netdevice attached to the hardware is 2370 * enabled. Because it is not called for monitor mode devices, @start 2371 * and @stop must be implemented. 2372 * The driver should perform any initialization it needs before 2373 * the device can be enabled. The initial configuration for the 2374 * interface is given in the conf parameter. 2375 * The callback may refuse to add an interface by returning a 2376 * negative error code (which will be seen in userspace.) 2377 * Must be implemented and can sleep. 2378 * 2379 * @change_interface: Called when a netdevice changes type. This callback 2380 * is optional, but only if it is supported can interface types be 2381 * switched while the interface is UP. The callback may sleep. 2382 * Note that while an interface is being switched, it will not be 2383 * found by the interface iteration callbacks. 2384 * 2385 * @remove_interface: Notifies a driver that an interface is going down. 2386 * The @stop callback is called after this if it is the last interface 2387 * and no monitor interfaces are present. 2388 * When all interfaces are removed, the MAC address in the hardware 2389 * must be cleared so the device no longer acknowledges packets, 2390 * the mac_addr member of the conf structure is, however, set to the 2391 * MAC address of the device going away. 2392 * Hence, this callback must be implemented. It can sleep. 2393 * 2394 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2395 * function to change hardware configuration, e.g., channel. 2396 * This function should never fail but returns a negative error code 2397 * if it does. The callback can sleep. 2398 * 2399 * @bss_info_changed: Handler for configuration requests related to BSS 2400 * parameters that may vary during BSS's lifespan, and may affect low 2401 * level driver (e.g. assoc/disassoc status, erp parameters). 2402 * This function should not be used if no BSS has been set, unless 2403 * for association indication. The @changed parameter indicates which 2404 * of the bss parameters has changed when a call is made. The callback 2405 * can sleep. 2406 * 2407 * @prepare_multicast: Prepare for multicast filter configuration. 2408 * This callback is optional, and its return value is passed 2409 * to configure_filter(). This callback must be atomic. 2410 * 2411 * @configure_filter: Configure the device's RX filter. 2412 * See the section "Frame filtering" for more information. 2413 * This callback must be implemented and can sleep. 2414 * 2415 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2416 * must be set or cleared for a given STA. Must be atomic. 2417 * 2418 * @set_key: See the section "Hardware crypto acceleration" 2419 * This callback is only called between add_interface and 2420 * remove_interface calls, i.e. while the given virtual interface 2421 * is enabled. 2422 * Returns a negative error code if the key can't be added. 2423 * The callback can sleep. 2424 * 2425 * @update_tkip_key: See the section "Hardware crypto acceleration" 2426 * This callback will be called in the context of Rx. Called for drivers 2427 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2428 * The callback must be atomic. 2429 * 2430 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2431 * host is suspended, it can assign this callback to retrieve the data 2432 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2433 * After rekeying was done it should (for example during resume) notify 2434 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2435 * 2436 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2437 * WEP when the device sends data packets autonomously, e.g. for ARP 2438 * offloading. The index can be 0-3, or -1 for unsetting it. 2439 * 2440 * @hw_scan: Ask the hardware to service the scan request, no need to start 2441 * the scan state machine in stack. The scan must honour the channel 2442 * configuration done by the regulatory agent in the wiphy's 2443 * registered bands. The hardware (or the driver) needs to make sure 2444 * that power save is disabled. 2445 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2446 * entire IEs after the SSID, so that drivers need not look at these 2447 * at all but just send them after the SSID -- mac80211 includes the 2448 * (extended) supported rates and HT information (where applicable). 2449 * When the scan finishes, ieee80211_scan_completed() must be called; 2450 * note that it also must be called when the scan cannot finish due to 2451 * any error unless this callback returned a negative error code. 2452 * The callback can sleep. 2453 * 2454 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2455 * The driver should ask the hardware to cancel the scan (if possible), 2456 * but the scan will be completed only after the driver will call 2457 * ieee80211_scan_completed(). 2458 * This callback is needed for wowlan, to prevent enqueueing a new 2459 * scan_work after the low-level driver was already suspended. 2460 * The callback can sleep. 2461 * 2462 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2463 * specific intervals. The driver must call the 2464 * ieee80211_sched_scan_results() function whenever it finds results. 2465 * This process will continue until sched_scan_stop is called. 2466 * 2467 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2468 * 2469 * @sw_scan_start: Notifier function that is called just before a software scan 2470 * is started. Can be NULL, if the driver doesn't need this notification. 2471 * The callback can sleep. 2472 * 2473 * @sw_scan_complete: Notifier function that is called just after a 2474 * software scan finished. Can be NULL, if the driver doesn't need 2475 * this notification. 2476 * The callback can sleep. 2477 * 2478 * @get_stats: Return low-level statistics. 2479 * Returns zero if statistics are available. 2480 * The callback can sleep. 2481 * 2482 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2483 * callback should be provided to read the TKIP transmit IVs (both IV32 2484 * and IV16) for the given key from hardware. 2485 * The callback must be atomic. 2486 * 2487 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2488 * if the device does fragmentation by itself; if this callback is 2489 * implemented then the stack will not do fragmentation. 2490 * The callback can sleep. 2491 * 2492 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2493 * The callback can sleep. 2494 * 2495 * @sta_add: Notifies low level driver about addition of an associated station, 2496 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2497 * 2498 * @sta_remove: Notifies low level driver about removal of an associated 2499 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 2500 * returns it isn't safe to use the pointer, not even RCU protected; 2501 * no RCU grace period is guaranteed between returning here and freeing 2502 * the station. See @sta_pre_rcu_remove if needed. 2503 * This callback can sleep. 2504 * 2505 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2506 * when a station is added to mac80211's station list. This callback 2507 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2508 * conditional. This callback can sleep. 2509 * 2510 * @sta_remove_debugfs: Remove the debugfs files which were added using 2511 * @sta_add_debugfs. This callback can sleep. 2512 * 2513 * @sta_notify: Notifies low level driver about power state transition of an 2514 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2515 * in AP mode, this callback will not be called when the flag 2516 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2517 * 2518 * @sta_state: Notifies low level driver about state transition of a 2519 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2520 * This callback is mutually exclusive with @sta_add/@sta_remove. 2521 * It must not fail for down transitions but may fail for transitions 2522 * up the list of states. Also note that after the callback returns it 2523 * isn't safe to use the pointer, not even RCU protected - no RCU grace 2524 * period is guaranteed between returning here and freeing the station. 2525 * See @sta_pre_rcu_remove if needed. 2526 * The callback can sleep. 2527 * 2528 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 2529 * synchronisation. This is useful if a driver needs to have station 2530 * pointers protected using RCU, it can then use this call to clear 2531 * the pointers instead of waiting for an RCU grace period to elapse 2532 * in @sta_state. 2533 * The callback can sleep. 2534 * 2535 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2536 * used to transmit to the station. The changes are advertised with bits 2537 * from &enum ieee80211_rate_control_changed and the values are reflected 2538 * in the station data. This callback should only be used when the driver 2539 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2540 * otherwise the rate control algorithm is notified directly. 2541 * Must be atomic. 2542 * 2543 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2544 * bursting) for a hardware TX queue. 2545 * Returns a negative error code on failure. 2546 * The callback can sleep. 2547 * 2548 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2549 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2550 * required function. 2551 * The callback can sleep. 2552 * 2553 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2554 * Currently, this is only used for IBSS mode debugging. Is not a 2555 * required function. 2556 * The callback can sleep. 2557 * 2558 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2559 * with other STAs in the IBSS. This is only used in IBSS mode. This 2560 * function is optional if the firmware/hardware takes full care of 2561 * TSF synchronization. 2562 * The callback can sleep. 2563 * 2564 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2565 * This is needed only for IBSS mode and the result of this function is 2566 * used to determine whether to reply to Probe Requests. 2567 * Returns non-zero if this device sent the last beacon. 2568 * The callback can sleep. 2569 * 2570 * @ampdu_action: Perform a certain A-MPDU action 2571 * The RA/TID combination determines the destination and TID we want 2572 * the ampdu action to be performed for. The action is defined through 2573 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2574 * is the first frame we expect to perform the action on. Notice 2575 * that TX/RX_STOP can pass NULL for this parameter. 2576 * The @buf_size parameter is only valid when the action is set to 2577 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2578 * buffer size (number of subframes) for this session -- the driver 2579 * may neither send aggregates containing more subframes than this 2580 * nor send aggregates in a way that lost frames would exceed the 2581 * buffer size. If just limiting the aggregate size, this would be 2582 * possible with a buf_size of 8: 2583 * - TX: 1.....7 2584 * - RX: 2....7 (lost frame #1) 2585 * - TX: 8..1... 2586 * which is invalid since #1 was now re-transmitted well past the 2587 * buffer size of 8. Correct ways to retransmit #1 would be: 2588 * - TX: 1 or 18 or 81 2589 * Even "189" would be wrong since 1 could be lost again. 2590 * 2591 * Returns a negative error code on failure. 2592 * The callback can sleep. 2593 * 2594 * @get_survey: Return per-channel survey information 2595 * 2596 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2597 * need to set wiphy->rfkill_poll to %true before registration, 2598 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2599 * The callback can sleep. 2600 * 2601 * @set_coverage_class: Set slot time for given coverage class as specified 2602 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2603 * accordingly. This callback is not required and may sleep. 2604 * 2605 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 2606 * be %NULL. The callback can sleep. 2607 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2608 * 2609 * @flush: Flush all pending frames from the hardware queue, making sure 2610 * that the hardware queues are empty. The @queues parameter is a bitmap 2611 * of queues to flush, which is useful if different virtual interfaces 2612 * use different hardware queues; it may also indicate all queues. 2613 * If the parameter @drop is set to %true, pending frames may be dropped. 2614 * The callback can sleep. 2615 * 2616 * @channel_switch: Drivers that need (or want) to offload the channel 2617 * switch operation for CSAs received from the AP may implement this 2618 * callback. They must then call ieee80211_chswitch_done() to indicate 2619 * completion of the channel switch. 2620 * 2621 * @napi_poll: Poll Rx queue for incoming data frames. 2622 * 2623 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2624 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2625 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2626 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2627 * 2628 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2629 * 2630 * @remain_on_channel: Starts an off-channel period on the given channel, must 2631 * call back to ieee80211_ready_on_channel() when on that channel. Note 2632 * that normal channel traffic is not stopped as this is intended for hw 2633 * offload. Frames to transmit on the off-channel channel are transmitted 2634 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2635 * duration (which will always be non-zero) expires, the driver must call 2636 * ieee80211_remain_on_channel_expired(). 2637 * Note that this callback may be called while the device is in IDLE and 2638 * must be accepted in this case. 2639 * This callback may sleep. 2640 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2641 * aborted before it expires. This callback may sleep. 2642 * 2643 * @set_ringparam: Set tx and rx ring sizes. 2644 * 2645 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2646 * 2647 * @tx_frames_pending: Check if there is any pending frame in the hardware 2648 * queues before entering power save. 2649 * 2650 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2651 * when transmitting a frame. Currently only legacy rates are handled. 2652 * The callback can sleep. 2653 * @rssi_callback: Notify driver when the average RSSI goes above/below 2654 * thresholds that were registered previously. The callback can sleep. 2655 * 2656 * @release_buffered_frames: Release buffered frames according to the given 2657 * parameters. In the case where the driver buffers some frames for 2658 * sleeping stations mac80211 will use this callback to tell the driver 2659 * to release some frames, either for PS-poll or uAPSD. 2660 * Note that if the @more_data paramter is %false the driver must check 2661 * if there are more frames on the given TIDs, and if there are more than 2662 * the frames being released then it must still set the more-data bit in 2663 * the frame. If the @more_data parameter is %true, then of course the 2664 * more-data bit must always be set. 2665 * The @tids parameter tells the driver which TIDs to release frames 2666 * from, for PS-poll it will always have only a single bit set. 2667 * In the case this is used for a PS-poll initiated release, the 2668 * @num_frames parameter will always be 1 so code can be shared. In 2669 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2670 * on the TX status (and must report TX status) so that the PS-poll 2671 * period is properly ended. This is used to avoid sending multiple 2672 * responses for a retried PS-poll frame. 2673 * In the case this is used for uAPSD, the @num_frames parameter may be 2674 * bigger than one, but the driver may send fewer frames (it must send 2675 * at least one, however). In this case it is also responsible for 2676 * setting the EOSP flag in the QoS header of the frames. Also, when the 2677 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2678 * on the last frame in the SP. Alternatively, it may call the function 2679 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 2680 * This callback must be atomic. 2681 * @allow_buffered_frames: Prepare device to allow the given number of frames 2682 * to go out to the given station. The frames will be sent by mac80211 2683 * via the usual TX path after this call. The TX information for frames 2684 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2685 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2686 * frames from multiple TIDs are released and the driver might reorder 2687 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2688 * on the last frame and clear it on all others and also handle the EOSP 2689 * bit in the QoS header correctly. Alternatively, it can also call the 2690 * ieee80211_sta_eosp() function. 2691 * The @tids parameter is a bitmap and tells the driver which TIDs the 2692 * frames will be on; it will at most have two bits set. 2693 * This callback must be atomic. 2694 * 2695 * @get_et_sset_count: Ethtool API to get string-set count. 2696 * 2697 * @get_et_stats: Ethtool API to get a set of u64 stats. 2698 * 2699 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2700 * and perhaps other supported types of ethtool data-sets. 2701 * 2702 * @get_rssi: Get current signal strength in dBm, the function is optional 2703 * and can sleep. 2704 * 2705 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2706 * before associated. In multi-channel scenarios, a virtual interface is 2707 * bound to a channel before it is associated, but as it isn't associated 2708 * yet it need not necessarily be given airtime, in particular since any 2709 * transmission to a P2P GO needs to be synchronized against the GO's 2710 * powersave state. mac80211 will call this function before transmitting a 2711 * management frame prior to having successfully associated to allow the 2712 * driver to give it channel time for the transmission, to get a response 2713 * and to be able to synchronize with the GO. 2714 * The callback will be called before each transmission and upon return 2715 * mac80211 will transmit the frame right away. 2716 * The callback is optional and can (should!) sleep. 2717 * 2718 * @add_chanctx: Notifies device driver about new channel context creation. 2719 * @remove_chanctx: Notifies device driver about channel context destruction. 2720 * @change_chanctx: Notifies device driver about channel context changes that 2721 * may happen when combining different virtual interfaces on the same 2722 * channel context with different settings 2723 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2724 * to vif. Possible use is for hw queue remapping. 2725 * @unassign_vif_chanctx: Notifies device driver about channel context being 2726 * unbound from vif. 2727 * @start_ap: Start operation on the AP interface, this is called after all the 2728 * information in bss_conf is set and beacon can be retrieved. A channel 2729 * context is bound before this is called. Note that if the driver uses 2730 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2731 * just "paused" for scanning/ROC, which is indicated by the beacon being 2732 * disabled/enabled via @bss_info_changed. 2733 * @stop_ap: Stop operation on the AP interface. 2734 * 2735 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2736 * reconfiguration has completed. This can help the driver implement the 2737 * reconfiguration step. Also called when reconfiguring because the 2738 * driver's resume function returned 1, as this is just like an "inline" 2739 * hardware restart. This callback may sleep. 2740 * 2741 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2742 * Currently, this is only called for managed or P2P client interfaces. 2743 * This callback is optional; it must not sleep. 2744 * 2745 * @channel_switch_beacon: Starts a channel switch to a new channel. 2746 * Beacons are modified to include CSA or ECSA IEs before calling this 2747 * function. The corresponding count fields in these IEs must be 2748 * decremented, and when they reach zero the driver must call 2749 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 2750 * get the csa counter decremented by mac80211, but must check if it is 2751 * zero using ieee80211_csa_is_complete() after the beacon has been 2752 * transmitted and then call ieee80211_csa_finish(). 2753 * 2754 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 2755 * information in bss_conf is set up and the beacon can be retrieved. A 2756 * channel context is bound before this is called. 2757 * @leave_ibss: Leave the IBSS again. 2758 */ 2759struct ieee80211_ops { 2760 void (*tx)(struct ieee80211_hw *hw, 2761 struct ieee80211_tx_control *control, 2762 struct sk_buff *skb); 2763 int (*start)(struct ieee80211_hw *hw); 2764 void (*stop)(struct ieee80211_hw *hw); 2765#ifdef CONFIG_PM 2766 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2767 int (*resume)(struct ieee80211_hw *hw); 2768 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2769#endif 2770 int (*add_interface)(struct ieee80211_hw *hw, 2771 struct ieee80211_vif *vif); 2772 int (*change_interface)(struct ieee80211_hw *hw, 2773 struct ieee80211_vif *vif, 2774 enum nl80211_iftype new_type, bool p2p); 2775 void (*remove_interface)(struct ieee80211_hw *hw, 2776 struct ieee80211_vif *vif); 2777 int (*config)(struct ieee80211_hw *hw, u32 changed); 2778 void (*bss_info_changed)(struct ieee80211_hw *hw, 2779 struct ieee80211_vif *vif, 2780 struct ieee80211_bss_conf *info, 2781 u32 changed); 2782 2783 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2784 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2785 2786 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2787 struct netdev_hw_addr_list *mc_list); 2788 void (*configure_filter)(struct ieee80211_hw *hw, 2789 unsigned int changed_flags, 2790 unsigned int *total_flags, 2791 u64 multicast); 2792 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2793 bool set); 2794 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2795 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2796 struct ieee80211_key_conf *key); 2797 void (*update_tkip_key)(struct ieee80211_hw *hw, 2798 struct ieee80211_vif *vif, 2799 struct ieee80211_key_conf *conf, 2800 struct ieee80211_sta *sta, 2801 u32 iv32, u16 *phase1key); 2802 void (*set_rekey_data)(struct ieee80211_hw *hw, 2803 struct ieee80211_vif *vif, 2804 struct cfg80211_gtk_rekey_data *data); 2805 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2806 struct ieee80211_vif *vif, int idx); 2807 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2808 struct cfg80211_scan_request *req); 2809 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2810 struct ieee80211_vif *vif); 2811 int (*sched_scan_start)(struct ieee80211_hw *hw, 2812 struct ieee80211_vif *vif, 2813 struct cfg80211_sched_scan_request *req, 2814 struct ieee80211_sched_scan_ies *ies); 2815 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2816 struct ieee80211_vif *vif); 2817 void (*sw_scan_start)(struct ieee80211_hw *hw); 2818 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2819 int (*get_stats)(struct ieee80211_hw *hw, 2820 struct ieee80211_low_level_stats *stats); 2821 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2822 u32 *iv32, u16 *iv16); 2823 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2824 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2825 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2826 struct ieee80211_sta *sta); 2827 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2828 struct ieee80211_sta *sta); 2829#ifdef CONFIG_MAC80211_DEBUGFS 2830 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2831 struct ieee80211_vif *vif, 2832 struct ieee80211_sta *sta, 2833 struct dentry *dir); 2834 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2835 struct ieee80211_vif *vif, 2836 struct ieee80211_sta *sta, 2837 struct dentry *dir); 2838#endif 2839 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2840 enum sta_notify_cmd, struct ieee80211_sta *sta); 2841 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2842 struct ieee80211_sta *sta, 2843 enum ieee80211_sta_state old_state, 2844 enum ieee80211_sta_state new_state); 2845 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 2846 struct ieee80211_vif *vif, 2847 struct ieee80211_sta *sta); 2848 void (*sta_rc_update)(struct ieee80211_hw *hw, 2849 struct ieee80211_vif *vif, 2850 struct ieee80211_sta *sta, 2851 u32 changed); 2852 int (*conf_tx)(struct ieee80211_hw *hw, 2853 struct ieee80211_vif *vif, u16 ac, 2854 const struct ieee80211_tx_queue_params *params); 2855 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2856 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2857 u64 tsf); 2858 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2859 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2860 int (*ampdu_action)(struct ieee80211_hw *hw, 2861 struct ieee80211_vif *vif, 2862 enum ieee80211_ampdu_mlme_action action, 2863 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2864 u8 buf_size); 2865 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2866 struct survey_info *survey); 2867 void (*rfkill_poll)(struct ieee80211_hw *hw); 2868 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2869#ifdef CONFIG_NL80211_TESTMODE 2870 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2871 void *data, int len); 2872 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2873 struct netlink_callback *cb, 2874 void *data, int len); 2875#endif 2876 void (*flush)(struct ieee80211_hw *hw, u32 queues, bool drop); 2877 void (*channel_switch)(struct ieee80211_hw *hw, 2878 struct ieee80211_channel_switch *ch_switch); 2879 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2880 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2881 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2882 2883 int (*remain_on_channel)(struct ieee80211_hw *hw, 2884 struct ieee80211_vif *vif, 2885 struct ieee80211_channel *chan, 2886 int duration, 2887 enum ieee80211_roc_type type); 2888 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2889 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2890 void (*get_ringparam)(struct ieee80211_hw *hw, 2891 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2892 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2893 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2894 const struct cfg80211_bitrate_mask *mask); 2895 void (*rssi_callback)(struct ieee80211_hw *hw, 2896 struct ieee80211_vif *vif, 2897 enum ieee80211_rssi_event rssi_event); 2898 2899 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2900 struct ieee80211_sta *sta, 2901 u16 tids, int num_frames, 2902 enum ieee80211_frame_release_type reason, 2903 bool more_data); 2904 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2905 struct ieee80211_sta *sta, 2906 u16 tids, int num_frames, 2907 enum ieee80211_frame_release_type reason, 2908 bool more_data); 2909 2910 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2911 struct ieee80211_vif *vif, int sset); 2912 void (*get_et_stats)(struct ieee80211_hw *hw, 2913 struct ieee80211_vif *vif, 2914 struct ethtool_stats *stats, u64 *data); 2915 void (*get_et_strings)(struct ieee80211_hw *hw, 2916 struct ieee80211_vif *vif, 2917 u32 sset, u8 *data); 2918 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2919 struct ieee80211_sta *sta, s8 *rssi_dbm); 2920 2921 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2922 struct ieee80211_vif *vif); 2923 2924 int (*add_chanctx)(struct ieee80211_hw *hw, 2925 struct ieee80211_chanctx_conf *ctx); 2926 void (*remove_chanctx)(struct ieee80211_hw *hw, 2927 struct ieee80211_chanctx_conf *ctx); 2928 void (*change_chanctx)(struct ieee80211_hw *hw, 2929 struct ieee80211_chanctx_conf *ctx, 2930 u32 changed); 2931 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2932 struct ieee80211_vif *vif, 2933 struct ieee80211_chanctx_conf *ctx); 2934 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2935 struct ieee80211_vif *vif, 2936 struct ieee80211_chanctx_conf *ctx); 2937 2938 void (*restart_complete)(struct ieee80211_hw *hw); 2939 2940#if IS_ENABLED(CONFIG_IPV6) 2941 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2942 struct ieee80211_vif *vif, 2943 struct inet6_dev *idev); 2944#endif 2945 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 2946 struct ieee80211_vif *vif, 2947 struct cfg80211_chan_def *chandef); 2948 2949 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2950 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2951}; 2952 2953/** 2954 * ieee80211_alloc_hw - Allocate a new hardware device 2955 * 2956 * This must be called once for each hardware device. The returned pointer 2957 * must be used to refer to this device when calling other functions. 2958 * mac80211 allocates a private data area for the driver pointed to by 2959 * @priv in &struct ieee80211_hw, the size of this area is given as 2960 * @priv_data_len. 2961 * 2962 * @priv_data_len: length of private data 2963 * @ops: callbacks for this device 2964 * 2965 * Return: A pointer to the new hardware device, or %NULL on error. 2966 */ 2967struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2968 const struct ieee80211_ops *ops); 2969 2970/** 2971 * ieee80211_register_hw - Register hardware device 2972 * 2973 * You must call this function before any other functions in 2974 * mac80211. Note that before a hardware can be registered, you 2975 * need to fill the contained wiphy's information. 2976 * 2977 * @hw: the device to register as returned by ieee80211_alloc_hw() 2978 * 2979 * Return: 0 on success. An error code otherwise. 2980 */ 2981int ieee80211_register_hw(struct ieee80211_hw *hw); 2982 2983/** 2984 * struct ieee80211_tpt_blink - throughput blink description 2985 * @throughput: throughput in Kbit/sec 2986 * @blink_time: blink time in milliseconds 2987 * (full cycle, ie. one off + one on period) 2988 */ 2989struct ieee80211_tpt_blink { 2990 int throughput; 2991 int blink_time; 2992}; 2993 2994/** 2995 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2996 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2997 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2998 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2999 * interface is connected in some way, including being an AP 3000 */ 3001enum ieee80211_tpt_led_trigger_flags { 3002 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3003 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3004 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3005}; 3006 3007#ifdef CONFIG_MAC80211_LEDS 3008char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3009char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3010char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3011char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3012char *__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3013 unsigned int flags, 3014 const struct ieee80211_tpt_blink *blink_table, 3015 unsigned int blink_table_len); 3016#endif 3017/** 3018 * ieee80211_get_tx_led_name - get name of TX LED 3019 * 3020 * mac80211 creates a transmit LED trigger for each wireless hardware 3021 * that can be used to drive LEDs if your driver registers a LED device. 3022 * This function returns the name (or %NULL if not configured for LEDs) 3023 * of the trigger so you can automatically link the LED device. 3024 * 3025 * @hw: the hardware to get the LED trigger name for 3026 * 3027 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3028 */ 3029static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3030{ 3031#ifdef CONFIG_MAC80211_LEDS 3032 return __ieee80211_get_tx_led_name(hw); 3033#else 3034 return NULL; 3035#endif 3036} 3037 3038/** 3039 * ieee80211_get_rx_led_name - get name of RX LED 3040 * 3041 * mac80211 creates a receive LED trigger for each wireless hardware 3042 * that can be used to drive LEDs if your driver registers a LED device. 3043 * This function returns the name (or %NULL if not configured for LEDs) 3044 * of the trigger so you can automatically link the LED device. 3045 * 3046 * @hw: the hardware to get the LED trigger name for 3047 * 3048 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3049 */ 3050static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3051{ 3052#ifdef CONFIG_MAC80211_LEDS 3053 return __ieee80211_get_rx_led_name(hw); 3054#else 3055 return NULL; 3056#endif 3057} 3058 3059/** 3060 * ieee80211_get_assoc_led_name - get name of association LED 3061 * 3062 * mac80211 creates a association LED trigger for each wireless hardware 3063 * that can be used to drive LEDs if your driver registers a LED device. 3064 * This function returns the name (or %NULL if not configured for LEDs) 3065 * of the trigger so you can automatically link the LED device. 3066 * 3067 * @hw: the hardware to get the LED trigger name for 3068 * 3069 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3070 */ 3071static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3072{ 3073#ifdef CONFIG_MAC80211_LEDS 3074 return __ieee80211_get_assoc_led_name(hw); 3075#else 3076 return NULL; 3077#endif 3078} 3079 3080/** 3081 * ieee80211_get_radio_led_name - get name of radio LED 3082 * 3083 * mac80211 creates a radio change LED trigger for each wireless hardware 3084 * that can be used to drive LEDs if your driver registers a LED device. 3085 * This function returns the name (or %NULL if not configured for LEDs) 3086 * of the trigger so you can automatically link the LED device. 3087 * 3088 * @hw: the hardware to get the LED trigger name for 3089 * 3090 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3091 */ 3092static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3093{ 3094#ifdef CONFIG_MAC80211_LEDS 3095 return __ieee80211_get_radio_led_name(hw); 3096#else 3097 return NULL; 3098#endif 3099} 3100 3101/** 3102 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3103 * @hw: the hardware to create the trigger for 3104 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3105 * @blink_table: the blink table -- needs to be ordered by throughput 3106 * @blink_table_len: size of the blink table 3107 * 3108 * Return: %NULL (in case of error, or if no LED triggers are 3109 * configured) or the name of the new trigger. 3110 * 3111 * Note: This function must be called before ieee80211_register_hw(). 3112 */ 3113static inline char * 3114ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3115 const struct ieee80211_tpt_blink *blink_table, 3116 unsigned int blink_table_len) 3117{ 3118#ifdef CONFIG_MAC80211_LEDS 3119 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3120 blink_table_len); 3121#else 3122 return NULL; 3123#endif 3124} 3125 3126/** 3127 * ieee80211_unregister_hw - Unregister a hardware device 3128 * 3129 * This function instructs mac80211 to free allocated resources 3130 * and unregister netdevices from the networking subsystem. 3131 * 3132 * @hw: the hardware to unregister 3133 */ 3134void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3135 3136/** 3137 * ieee80211_free_hw - free hardware descriptor 3138 * 3139 * This function frees everything that was allocated, including the 3140 * private data for the driver. You must call ieee80211_unregister_hw() 3141 * before calling this function. 3142 * 3143 * @hw: the hardware to free 3144 */ 3145void ieee80211_free_hw(struct ieee80211_hw *hw); 3146 3147/** 3148 * ieee80211_restart_hw - restart hardware completely 3149 * 3150 * Call this function when the hardware was restarted for some reason 3151 * (hardware error, ...) and the driver is unable to restore its state 3152 * by itself. mac80211 assumes that at this point the driver/hardware 3153 * is completely uninitialised and stopped, it starts the process by 3154 * calling the ->start() operation. The driver will need to reset all 3155 * internal state that it has prior to calling this function. 3156 * 3157 * @hw: the hardware to restart 3158 */ 3159void ieee80211_restart_hw(struct ieee80211_hw *hw); 3160 3161/** ieee80211_napi_schedule - schedule NAPI poll 3162 * 3163 * Use this function to schedule NAPI polling on a device. 3164 * 3165 * @hw: the hardware to start polling 3166 */ 3167void ieee80211_napi_schedule(struct ieee80211_hw *hw); 3168 3169/** ieee80211_napi_complete - complete NAPI polling 3170 * 3171 * Use this function to finish NAPI polling on a device. 3172 * 3173 * @hw: the hardware to stop polling 3174 */ 3175void ieee80211_napi_complete(struct ieee80211_hw *hw); 3176 3177/** 3178 * ieee80211_rx - receive frame 3179 * 3180 * Use this function to hand received frames to mac80211. The receive 3181 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3182 * paged @skb is used, the driver is recommended to put the ieee80211 3183 * header of the frame on the linear part of the @skb to avoid memory 3184 * allocation and/or memcpy by the stack. 3185 * 3186 * This function may not be called in IRQ context. Calls to this function 3187 * for a single hardware must be synchronized against each other. Calls to 3188 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3189 * mixed for a single hardware. Must not run concurrently with 3190 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3191 * 3192 * In process context use instead ieee80211_rx_ni(). 3193 * 3194 * @hw: the hardware this frame came in on 3195 * @skb: the buffer to receive, owned by mac80211 after this call 3196 */ 3197void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 3198 3199/** 3200 * ieee80211_rx_irqsafe - receive frame 3201 * 3202 * Like ieee80211_rx() but can be called in IRQ context 3203 * (internally defers to a tasklet.) 3204 * 3205 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3206 * be mixed for a single hardware.Must not run concurrently with 3207 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3208 * 3209 * @hw: the hardware this frame came in on 3210 * @skb: the buffer to receive, owned by mac80211 after this call 3211 */ 3212void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3213 3214/** 3215 * ieee80211_rx_ni - receive frame (in process context) 3216 * 3217 * Like ieee80211_rx() but can be called in process context 3218 * (internally disables bottom halves). 3219 * 3220 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3221 * not be mixed for a single hardware. Must not run concurrently with 3222 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3223 * 3224 * @hw: the hardware this frame came in on 3225 * @skb: the buffer to receive, owned by mac80211 after this call 3226 */ 3227static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3228 struct sk_buff *skb) 3229{ 3230 local_bh_disable(); 3231 ieee80211_rx(hw, skb); 3232 local_bh_enable(); 3233} 3234 3235/** 3236 * ieee80211_sta_ps_transition - PS transition for connected sta 3237 * 3238 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3239 * flag set, use this function to inform mac80211 about a connected station 3240 * entering/leaving PS mode. 3241 * 3242 * This function may not be called in IRQ context or with softirqs enabled. 3243 * 3244 * Calls to this function for a single hardware must be synchronized against 3245 * each other. 3246 * 3247 * @sta: currently connected sta 3248 * @start: start or stop PS 3249 * 3250 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3251 */ 3252int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3253 3254/** 3255 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3256 * (in process context) 3257 * 3258 * Like ieee80211_sta_ps_transition() but can be called in process context 3259 * (internally disables bottom halves). Concurrent call restriction still 3260 * applies. 3261 * 3262 * @sta: currently connected sta 3263 * @start: start or stop PS 3264 * 3265 * Return: Like ieee80211_sta_ps_transition(). 3266 */ 3267static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3268 bool start) 3269{ 3270 int ret; 3271 3272 local_bh_disable(); 3273 ret = ieee80211_sta_ps_transition(sta, start); 3274 local_bh_enable(); 3275 3276 return ret; 3277} 3278 3279/* 3280 * The TX headroom reserved by mac80211 for its own tx_status functions. 3281 * This is enough for the radiotap header. 3282 */ 3283#define IEEE80211_TX_STATUS_HEADROOM 14 3284 3285/** 3286 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3287 * @sta: &struct ieee80211_sta pointer for the sleeping station 3288 * @tid: the TID that has buffered frames 3289 * @buffered: indicates whether or not frames are buffered for this TID 3290 * 3291 * If a driver buffers frames for a powersave station instead of passing 3292 * them back to mac80211 for retransmission, the station may still need 3293 * to be told that there are buffered frames via the TIM bit. 3294 * 3295 * This function informs mac80211 whether or not there are frames that are 3296 * buffered in the driver for a given TID; mac80211 can then use this data 3297 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3298 * call! Beware of the locking!) 3299 * 3300 * If all frames are released to the station (due to PS-poll or uAPSD) 3301 * then the driver needs to inform mac80211 that there no longer are 3302 * frames buffered. However, when the station wakes up mac80211 assumes 3303 * that all buffered frames will be transmitted and clears this data, 3304 * drivers need to make sure they inform mac80211 about all buffered 3305 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3306 * 3307 * Note that technically mac80211 only needs to know this per AC, not per 3308 * TID, but since driver buffering will inevitably happen per TID (since 3309 * it is related to aggregation) it is easier to make mac80211 map the 3310 * TID to the AC as required instead of keeping track in all drivers that 3311 * use this API. 3312 */ 3313void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3314 u8 tid, bool buffered); 3315 3316/** 3317 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 3318 * 3319 * Call this function in a driver with per-packet rate selection support 3320 * to combine the rate info in the packet tx info with the most recent 3321 * rate selection table for the station entry. 3322 * 3323 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3324 * @sta: the receiver station to which this packet is sent. 3325 * @skb: the frame to be transmitted. 3326 * @dest: buffer for extracted rate/retry information 3327 * @max_rates: maximum number of rates to fetch 3328 */ 3329void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 3330 struct ieee80211_sta *sta, 3331 struct sk_buff *skb, 3332 struct ieee80211_tx_rate *dest, 3333 int max_rates); 3334 3335/** 3336 * ieee80211_tx_status - transmit status callback 3337 * 3338 * Call this function for all transmitted frames after they have been 3339 * transmitted. It is permissible to not call this function for 3340 * multicast frames but this can affect statistics. 3341 * 3342 * This function may not be called in IRQ context. Calls to this function 3343 * for a single hardware must be synchronized against each other. Calls 3344 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3345 * may not be mixed for a single hardware. Must not run concurrently with 3346 * ieee80211_rx() or ieee80211_rx_ni(). 3347 * 3348 * @hw: the hardware the frame was transmitted by 3349 * @skb: the frame that was transmitted, owned by mac80211 after this call 3350 */ 3351void ieee80211_tx_status(struct ieee80211_hw *hw, 3352 struct sk_buff *skb); 3353 3354/** 3355 * ieee80211_tx_status_ni - transmit status callback (in process context) 3356 * 3357 * Like ieee80211_tx_status() but can be called in process context. 3358 * 3359 * Calls to this function, ieee80211_tx_status() and 3360 * ieee80211_tx_status_irqsafe() may not be mixed 3361 * for a single hardware. 3362 * 3363 * @hw: the hardware the frame was transmitted by 3364 * @skb: the frame that was transmitted, owned by mac80211 after this call 3365 */ 3366static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3367 struct sk_buff *skb) 3368{ 3369 local_bh_disable(); 3370 ieee80211_tx_status(hw, skb); 3371 local_bh_enable(); 3372} 3373 3374/** 3375 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3376 * 3377 * Like ieee80211_tx_status() but can be called in IRQ context 3378 * (internally defers to a tasklet.) 3379 * 3380 * Calls to this function, ieee80211_tx_status() and 3381 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3382 * 3383 * @hw: the hardware the frame was transmitted by 3384 * @skb: the frame that was transmitted, owned by mac80211 after this call 3385 */ 3386void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3387 struct sk_buff *skb); 3388 3389/** 3390 * ieee80211_report_low_ack - report non-responding station 3391 * 3392 * When operating in AP-mode, call this function to report a non-responding 3393 * connected STA. 3394 * 3395 * @sta: the non-responding connected sta 3396 * @num_packets: number of packets sent to @sta without a response 3397 */ 3398void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3399 3400/** 3401 * ieee80211_beacon_get_tim - beacon generation function 3402 * @hw: pointer obtained from ieee80211_alloc_hw(). 3403 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3404 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3405 * Set to 0 if invalid (in non-AP modes). 3406 * @tim_length: pointer to variable that will receive the TIM IE length, 3407 * (including the ID and length bytes!). 3408 * Set to 0 if invalid (in non-AP modes). 3409 * 3410 * If the driver implements beaconing modes, it must use this function to 3411 * obtain the beacon frame/template. 3412 * 3413 * If the beacon frames are generated by the host system (i.e., not in 3414 * hardware/firmware), the driver uses this function to get each beacon 3415 * frame from mac80211 -- it is responsible for calling this function 3416 * before the beacon is needed (e.g. based on hardware interrupt). 3417 * 3418 * If the beacon frames are generated by the device, then the driver 3419 * must use the returned beacon as the template and change the TIM IE 3420 * according to the current DTIM parameters/TIM bitmap. 3421 * 3422 * The driver is responsible for freeing the returned skb. 3423 * 3424 * Return: The beacon template. %NULL on error. 3425 */ 3426struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3427 struct ieee80211_vif *vif, 3428 u16 *tim_offset, u16 *tim_length); 3429 3430/** 3431 * ieee80211_beacon_get - beacon generation function 3432 * @hw: pointer obtained from ieee80211_alloc_hw(). 3433 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3434 * 3435 * See ieee80211_beacon_get_tim(). 3436 * 3437 * Return: See ieee80211_beacon_get_tim(). 3438 */ 3439static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3440 struct ieee80211_vif *vif) 3441{ 3442 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3443} 3444 3445/** 3446 * ieee80211_csa_finish - notify mac80211 about channel switch 3447 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3448 * 3449 * After a channel switch announcement was scheduled and the counter in this 3450 * announcement hit zero, this function must be called by the driver to 3451 * notify mac80211 that the channel can be changed. 3452 */ 3453void ieee80211_csa_finish(struct ieee80211_vif *vif); 3454 3455/** 3456 * ieee80211_csa_is_complete - find out if counters reached zero 3457 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3458 * 3459 * This function returns whether the channel switch counters reached zero. 3460 */ 3461bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 3462 3463 3464/** 3465 * ieee80211_proberesp_get - retrieve a Probe Response template 3466 * @hw: pointer obtained from ieee80211_alloc_hw(). 3467 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3468 * 3469 * Creates a Probe Response template which can, for example, be uploaded to 3470 * hardware. The destination address should be set by the caller. 3471 * 3472 * Can only be called in AP mode. 3473 * 3474 * Return: The Probe Response template. %NULL on error. 3475 */ 3476struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3477 struct ieee80211_vif *vif); 3478 3479/** 3480 * ieee80211_pspoll_get - retrieve a PS Poll template 3481 * @hw: pointer obtained from ieee80211_alloc_hw(). 3482 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3483 * 3484 * Creates a PS Poll a template which can, for example, uploaded to 3485 * hardware. The template must be updated after association so that correct 3486 * AID, BSSID and MAC address is used. 3487 * 3488 * Note: Caller (or hardware) is responsible for setting the 3489 * &IEEE80211_FCTL_PM bit. 3490 * 3491 * Return: The PS Poll template. %NULL on error. 3492 */ 3493struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3494 struct ieee80211_vif *vif); 3495 3496/** 3497 * ieee80211_nullfunc_get - retrieve a nullfunc template 3498 * @hw: pointer obtained from ieee80211_alloc_hw(). 3499 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3500 * 3501 * Creates a Nullfunc template which can, for example, uploaded to 3502 * hardware. The template must be updated after association so that correct 3503 * BSSID and address is used. 3504 * 3505 * Note: Caller (or hardware) is responsible for setting the 3506 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3507 * 3508 * Return: The nullfunc template. %NULL on error. 3509 */ 3510struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3511 struct ieee80211_vif *vif); 3512 3513/** 3514 * ieee80211_probereq_get - retrieve a Probe Request template 3515 * @hw: pointer obtained from ieee80211_alloc_hw(). 3516 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3517 * @ssid: SSID buffer 3518 * @ssid_len: length of SSID 3519 * @tailroom: tailroom to reserve at end of SKB for IEs 3520 * 3521 * Creates a Probe Request template which can, for example, be uploaded to 3522 * hardware. 3523 * 3524 * Return: The Probe Request template. %NULL on error. 3525 */ 3526struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3527 struct ieee80211_vif *vif, 3528 const u8 *ssid, size_t ssid_len, 3529 size_t tailroom); 3530 3531/** 3532 * ieee80211_rts_get - RTS frame generation function 3533 * @hw: pointer obtained from ieee80211_alloc_hw(). 3534 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3535 * @frame: pointer to the frame that is going to be protected by the RTS. 3536 * @frame_len: the frame length (in octets). 3537 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3538 * @rts: The buffer where to store the RTS frame. 3539 * 3540 * If the RTS frames are generated by the host system (i.e., not in 3541 * hardware/firmware), the low-level driver uses this function to receive 3542 * the next RTS frame from the 802.11 code. The low-level is responsible 3543 * for calling this function before and RTS frame is needed. 3544 */ 3545void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3546 const void *frame, size_t frame_len, 3547 const struct ieee80211_tx_info *frame_txctl, 3548 struct ieee80211_rts *rts); 3549 3550/** 3551 * ieee80211_rts_duration - Get the duration field for an RTS frame 3552 * @hw: pointer obtained from ieee80211_alloc_hw(). 3553 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3554 * @frame_len: the length of the frame that is going to be protected by the RTS. 3555 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3556 * 3557 * If the RTS is generated in firmware, but the host system must provide 3558 * the duration field, the low-level driver uses this function to receive 3559 * the duration field value in little-endian byteorder. 3560 * 3561 * Return: The duration. 3562 */ 3563__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3564 struct ieee80211_vif *vif, size_t frame_len, 3565 const struct ieee80211_tx_info *frame_txctl); 3566 3567/** 3568 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3569 * @hw: pointer obtained from ieee80211_alloc_hw(). 3570 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3571 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3572 * @frame_len: the frame length (in octets). 3573 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3574 * @cts: The buffer where to store the CTS-to-self frame. 3575 * 3576 * If the CTS-to-self frames are generated by the host system (i.e., not in 3577 * hardware/firmware), the low-level driver uses this function to receive 3578 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3579 * for calling this function before and CTS-to-self frame is needed. 3580 */ 3581void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3582 struct ieee80211_vif *vif, 3583 const void *frame, size_t frame_len, 3584 const struct ieee80211_tx_info *frame_txctl, 3585 struct ieee80211_cts *cts); 3586 3587/** 3588 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3589 * @hw: pointer obtained from ieee80211_alloc_hw(). 3590 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3591 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3592 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3593 * 3594 * If the CTS-to-self is generated in firmware, but the host system must provide 3595 * the duration field, the low-level driver uses this function to receive 3596 * the duration field value in little-endian byteorder. 3597 * 3598 * Return: The duration. 3599 */ 3600__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3601 struct ieee80211_vif *vif, 3602 size_t frame_len, 3603 const struct ieee80211_tx_info *frame_txctl); 3604 3605/** 3606 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3607 * @hw: pointer obtained from ieee80211_alloc_hw(). 3608 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3609 * @band: the band to calculate the frame duration on 3610 * @frame_len: the length of the frame. 3611 * @rate: the rate at which the frame is going to be transmitted. 3612 * 3613 * Calculate the duration field of some generic frame, given its 3614 * length and transmission rate (in 100kbps). 3615 * 3616 * Return: The duration. 3617 */ 3618__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3619 struct ieee80211_vif *vif, 3620 enum ieee80211_band band, 3621 size_t frame_len, 3622 struct ieee80211_rate *rate); 3623 3624/** 3625 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3626 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3627 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3628 * 3629 * Function for accessing buffered broadcast and multicast frames. If 3630 * hardware/firmware does not implement buffering of broadcast/multicast 3631 * frames when power saving is used, 802.11 code buffers them in the host 3632 * memory. The low-level driver uses this function to fetch next buffered 3633 * frame. In most cases, this is used when generating beacon frame. 3634 * 3635 * Return: A pointer to the next buffered skb or NULL if no more buffered 3636 * frames are available. 3637 * 3638 * Note: buffered frames are returned only after DTIM beacon frame was 3639 * generated with ieee80211_beacon_get() and the low-level driver must thus 3640 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3641 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3642 * does not need to check for DTIM beacons separately and should be able to 3643 * use common code for all beacons. 3644 */ 3645struct sk_buff * 3646ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3647 3648/** 3649 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3650 * 3651 * This function returns the TKIP phase 1 key for the given IV32. 3652 * 3653 * @keyconf: the parameter passed with the set key 3654 * @iv32: IV32 to get the P1K for 3655 * @p1k: a buffer to which the key will be written, as 5 u16 values 3656 */ 3657void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3658 u32 iv32, u16 *p1k); 3659 3660/** 3661 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3662 * 3663 * This function returns the TKIP phase 1 key for the IV32 taken 3664 * from the given packet. 3665 * 3666 * @keyconf: the parameter passed with the set key 3667 * @skb: the packet to take the IV32 value from that will be encrypted 3668 * with this P1K 3669 * @p1k: a buffer to which the key will be written, as 5 u16 values 3670 */ 3671static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3672 struct sk_buff *skb, u16 *p1k) 3673{ 3674 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3675 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3676 u32 iv32 = get_unaligned_le32(&data[4]); 3677 3678 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3679} 3680 3681/** 3682 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3683 * 3684 * This function returns the TKIP phase 1 key for the given IV32 3685 * and transmitter address. 3686 * 3687 * @keyconf: the parameter passed with the set key 3688 * @ta: TA that will be used with the key 3689 * @iv32: IV32 to get the P1K for 3690 * @p1k: a buffer to which the key will be written, as 5 u16 values 3691 */ 3692void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3693 const u8 *ta, u32 iv32, u16 *p1k); 3694 3695/** 3696 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3697 * 3698 * This function computes the TKIP RC4 key for the IV values 3699 * in the packet. 3700 * 3701 * @keyconf: the parameter passed with the set key 3702 * @skb: the packet to take the IV32/IV16 values from that will be 3703 * encrypted with this key 3704 * @p2k: a buffer to which the key will be written, 16 bytes 3705 */ 3706void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3707 struct sk_buff *skb, u8 *p2k); 3708 3709/** 3710 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3711 * 3712 * This function computes the two AES-CMAC sub-keys, based on the 3713 * previously installed master key. 3714 * 3715 * @keyconf: the parameter passed with the set key 3716 * @k1: a buffer to be filled with the 1st sub-key 3717 * @k2: a buffer to be filled with the 2nd sub-key 3718 */ 3719void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3720 u8 *k1, u8 *k2); 3721 3722/** 3723 * struct ieee80211_key_seq - key sequence counter 3724 * 3725 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3726 * @ccmp: PN data, most significant byte first (big endian, 3727 * reverse order than in packet) 3728 * @aes_cmac: PN data, most significant byte first (big endian, 3729 * reverse order than in packet) 3730 */ 3731struct ieee80211_key_seq { 3732 union { 3733 struct { 3734 u32 iv32; 3735 u16 iv16; 3736 } tkip; 3737 struct { 3738 u8 pn[6]; 3739 } ccmp; 3740 struct { 3741 u8 pn[6]; 3742 } aes_cmac; 3743 }; 3744}; 3745 3746/** 3747 * ieee80211_get_key_tx_seq - get key TX sequence counter 3748 * 3749 * @keyconf: the parameter passed with the set key 3750 * @seq: buffer to receive the sequence data 3751 * 3752 * This function allows a driver to retrieve the current TX IV/PN 3753 * for the given key. It must not be called if IV generation is 3754 * offloaded to the device. 3755 * 3756 * Note that this function may only be called when no TX processing 3757 * can be done concurrently, for example when queues are stopped 3758 * and the stop has been synchronized. 3759 */ 3760void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3761 struct ieee80211_key_seq *seq); 3762 3763/** 3764 * ieee80211_get_key_rx_seq - get key RX sequence counter 3765 * 3766 * @keyconf: the parameter passed with the set key 3767 * @tid: The TID, or -1 for the management frame value (CCMP only); 3768 * the value on TID 0 is also used for non-QoS frames. For 3769 * CMAC, only TID 0 is valid. 3770 * @seq: buffer to receive the sequence data 3771 * 3772 * This function allows a driver to retrieve the current RX IV/PNs 3773 * for the given key. It must not be called if IV checking is done 3774 * by the device and not by mac80211. 3775 * 3776 * Note that this function may only be called when no RX processing 3777 * can be done concurrently. 3778 */ 3779void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3780 int tid, struct ieee80211_key_seq *seq); 3781 3782/** 3783 * ieee80211_set_key_tx_seq - set key TX sequence counter 3784 * 3785 * @keyconf: the parameter passed with the set key 3786 * @seq: new sequence data 3787 * 3788 * This function allows a driver to set the current TX IV/PNs for the 3789 * given key. This is useful when resuming from WoWLAN sleep and the 3790 * device may have transmitted frames using the PTK, e.g. replies to 3791 * ARP requests. 3792 * 3793 * Note that this function may only be called when no TX processing 3794 * can be done concurrently. 3795 */ 3796void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf, 3797 struct ieee80211_key_seq *seq); 3798 3799/** 3800 * ieee80211_set_key_rx_seq - set key RX sequence counter 3801 * 3802 * @keyconf: the parameter passed with the set key 3803 * @tid: The TID, or -1 for the management frame value (CCMP only); 3804 * the value on TID 0 is also used for non-QoS frames. For 3805 * CMAC, only TID 0 is valid. 3806 * @seq: new sequence data 3807 * 3808 * This function allows a driver to set the current RX IV/PNs for the 3809 * given key. This is useful when resuming from WoWLAN sleep and GTK 3810 * rekey may have been done while suspended. It should not be called 3811 * if IV checking is done by the device and not by mac80211. 3812 * 3813 * Note that this function may only be called when no RX processing 3814 * can be done concurrently. 3815 */ 3816void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 3817 int tid, struct ieee80211_key_seq *seq); 3818 3819/** 3820 * ieee80211_remove_key - remove the given key 3821 * @keyconf: the parameter passed with the set key 3822 * 3823 * Remove the given key. If the key was uploaded to the hardware at the 3824 * time this function is called, it is not deleted in the hardware but 3825 * instead assumed to have been removed already. 3826 * 3827 * Note that due to locking considerations this function can (currently) 3828 * only be called during key iteration (ieee80211_iter_keys().) 3829 */ 3830void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 3831 3832/** 3833 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 3834 * @vif: the virtual interface to add the key on 3835 * @keyconf: new key data 3836 * 3837 * When GTK rekeying was done while the system was suspended, (a) new 3838 * key(s) will be available. These will be needed by mac80211 for proper 3839 * RX processing, so this function allows setting them. 3840 * 3841 * The function returns the newly allocated key structure, which will 3842 * have similar contents to the passed key configuration but point to 3843 * mac80211-owned memory. In case of errors, the function returns an 3844 * ERR_PTR(), use IS_ERR() etc. 3845 * 3846 * Note that this function assumes the key isn't added to hardware 3847 * acceleration, so no TX will be done with the key. Since it's a GTK 3848 * on managed (station) networks, this is true anyway. If the driver 3849 * calls this function from the resume callback and subsequently uses 3850 * the return code 1 to reconfigure the device, this key will be part 3851 * of the reconfiguration. 3852 * 3853 * Note that the driver should also call ieee80211_set_key_rx_seq() 3854 * for the new key for each TID to set up sequence counters properly. 3855 * 3856 * IMPORTANT: If this replaces a key that is present in the hardware, 3857 * then it will attempt to remove it during this call. In many cases 3858 * this isn't what you want, so call ieee80211_remove_key() first for 3859 * the key that's being replaced. 3860 */ 3861struct ieee80211_key_conf * 3862ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 3863 struct ieee80211_key_conf *keyconf); 3864 3865/** 3866 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3867 * @vif: virtual interface the rekeying was done on 3868 * @bssid: The BSSID of the AP, for checking association 3869 * @replay_ctr: the new replay counter after GTK rekeying 3870 * @gfp: allocation flags 3871 */ 3872void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3873 const u8 *replay_ctr, gfp_t gfp); 3874 3875/** 3876 * ieee80211_wake_queue - wake specific queue 3877 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3878 * @queue: queue number (counted from zero). 3879 * 3880 * Drivers should use this function instead of netif_wake_queue. 3881 */ 3882void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3883 3884/** 3885 * ieee80211_stop_queue - stop specific queue 3886 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3887 * @queue: queue number (counted from zero). 3888 * 3889 * Drivers should use this function instead of netif_stop_queue. 3890 */ 3891void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3892 3893/** 3894 * ieee80211_queue_stopped - test status of the queue 3895 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3896 * @queue: queue number (counted from zero). 3897 * 3898 * Drivers should use this function instead of netif_stop_queue. 3899 * 3900 * Return: %true if the queue is stopped. %false otherwise. 3901 */ 3902 3903int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3904 3905/** 3906 * ieee80211_stop_queues - stop all queues 3907 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3908 * 3909 * Drivers should use this function instead of netif_stop_queue. 3910 */ 3911void ieee80211_stop_queues(struct ieee80211_hw *hw); 3912 3913/** 3914 * ieee80211_wake_queues - wake all queues 3915 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3916 * 3917 * Drivers should use this function instead of netif_wake_queue. 3918 */ 3919void ieee80211_wake_queues(struct ieee80211_hw *hw); 3920 3921/** 3922 * ieee80211_scan_completed - completed hardware scan 3923 * 3924 * When hardware scan offload is used (i.e. the hw_scan() callback is 3925 * assigned) this function needs to be called by the driver to notify 3926 * mac80211 that the scan finished. This function can be called from 3927 * any context, including hardirq context. 3928 * 3929 * @hw: the hardware that finished the scan 3930 * @aborted: set to true if scan was aborted 3931 */ 3932void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3933 3934/** 3935 * ieee80211_sched_scan_results - got results from scheduled scan 3936 * 3937 * When a scheduled scan is running, this function needs to be called by the 3938 * driver whenever there are new scan results available. 3939 * 3940 * @hw: the hardware that is performing scheduled scans 3941 */ 3942void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3943 3944/** 3945 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3946 * 3947 * When a scheduled scan is running, this function can be called by 3948 * the driver if it needs to stop the scan to perform another task. 3949 * Usual scenarios are drivers that cannot continue the scheduled scan 3950 * while associating, for instance. 3951 * 3952 * @hw: the hardware that is performing scheduled scans 3953 */ 3954void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3955 3956/** 3957 * enum ieee80211_interface_iteration_flags - interface iteration flags 3958 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3959 * been added to the driver; However, note that during hardware 3960 * reconfiguration (after restart_hw) it will iterate over a new 3961 * interface and over all the existing interfaces even if they 3962 * haven't been re-added to the driver yet. 3963 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3964 * interfaces, even if they haven't been re-added to the driver yet. 3965 */ 3966enum ieee80211_interface_iteration_flags { 3967 IEEE80211_IFACE_ITER_NORMAL = 0, 3968 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3969}; 3970 3971/** 3972 * ieee80211_iterate_active_interfaces - iterate active interfaces 3973 * 3974 * This function iterates over the interfaces associated with a given 3975 * hardware that are currently active and calls the callback for them. 3976 * This function allows the iterator function to sleep, when the iterator 3977 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3978 * be used. 3979 * Does not iterate over a new interface during add_interface(). 3980 * 3981 * @hw: the hardware struct of which the interfaces should be iterated over 3982 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3983 * @iterator: the iterator function to call 3984 * @data: first argument of the iterator function 3985 */ 3986void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3987 u32 iter_flags, 3988 void (*iterator)(void *data, u8 *mac, 3989 struct ieee80211_vif *vif), 3990 void *data); 3991 3992/** 3993 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3994 * 3995 * This function iterates over the interfaces associated with a given 3996 * hardware that are currently active and calls the callback for them. 3997 * This function requires the iterator callback function to be atomic, 3998 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3999 * Does not iterate over a new interface during add_interface(). 4000 * 4001 * @hw: the hardware struct of which the interfaces should be iterated over 4002 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4003 * @iterator: the iterator function to call, cannot sleep 4004 * @data: first argument of the iterator function 4005 */ 4006void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4007 u32 iter_flags, 4008 void (*iterator)(void *data, 4009 u8 *mac, 4010 struct ieee80211_vif *vif), 4011 void *data); 4012 4013/** 4014 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4015 * 4016 * This function iterates over the interfaces associated with a given 4017 * hardware that are currently active and calls the callback for them. 4018 * This version can only be used while holding the RTNL. 4019 * 4020 * @hw: the hardware struct of which the interfaces should be iterated over 4021 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4022 * @iterator: the iterator function to call, cannot sleep 4023 * @data: first argument of the iterator function 4024 */ 4025void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4026 u32 iter_flags, 4027 void (*iterator)(void *data, 4028 u8 *mac, 4029 struct ieee80211_vif *vif), 4030 void *data); 4031 4032/** 4033 * ieee80211_queue_work - add work onto the mac80211 workqueue 4034 * 4035 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4036 * This helper ensures drivers are not queueing work when they should not be. 4037 * 4038 * @hw: the hardware struct for the interface we are adding work for 4039 * @work: the work we want to add onto the mac80211 workqueue 4040 */ 4041void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4042 4043/** 4044 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4045 * 4046 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4047 * workqueue. 4048 * 4049 * @hw: the hardware struct for the interface we are adding work for 4050 * @dwork: delayable work to queue onto the mac80211 workqueue 4051 * @delay: number of jiffies to wait before queueing 4052 */ 4053void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4054 struct delayed_work *dwork, 4055 unsigned long delay); 4056 4057/** 4058 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4059 * @sta: the station for which to start a BA session 4060 * @tid: the TID to BA on. 4061 * @timeout: session timeout value (in TUs) 4062 * 4063 * Return: success if addBA request was sent, failure otherwise 4064 * 4065 * Although mac80211/low level driver/user space application can estimate 4066 * the need to start aggregation on a certain RA/TID, the session level 4067 * will be managed by the mac80211. 4068 */ 4069int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4070 u16 timeout); 4071 4072/** 4073 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4074 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4075 * @ra: receiver address of the BA session recipient. 4076 * @tid: the TID to BA on. 4077 * 4078 * This function must be called by low level driver once it has 4079 * finished with preparations for the BA session. It can be called 4080 * from any context. 4081 */ 4082void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4083 u16 tid); 4084 4085/** 4086 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4087 * @sta: the station whose BA session to stop 4088 * @tid: the TID to stop BA. 4089 * 4090 * Return: negative error if the TID is invalid, or no aggregation active 4091 * 4092 * Although mac80211/low level driver/user space application can estimate 4093 * the need to stop aggregation on a certain RA/TID, the session level 4094 * will be managed by the mac80211. 4095 */ 4096int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4097 4098/** 4099 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4100 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4101 * @ra: receiver address of the BA session recipient. 4102 * @tid: the desired TID to BA on. 4103 * 4104 * This function must be called by low level driver once it has 4105 * finished with preparations for the BA session tear down. It 4106 * can be called from any context. 4107 */ 4108void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4109 u16 tid); 4110 4111/** 4112 * ieee80211_find_sta - find a station 4113 * 4114 * @vif: virtual interface to look for station on 4115 * @addr: station's address 4116 * 4117 * Return: The station, if found. %NULL otherwise. 4118 * 4119 * Note: This function must be called under RCU lock and the 4120 * resulting pointer is only valid under RCU lock as well. 4121 */ 4122struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4123 const u8 *addr); 4124 4125/** 4126 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4127 * 4128 * @hw: pointer as obtained from ieee80211_alloc_hw() 4129 * @addr: remote station's address 4130 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4131 * 4132 * Return: The station, if found. %NULL otherwise. 4133 * 4134 * Note: This function must be called under RCU lock and the 4135 * resulting pointer is only valid under RCU lock as well. 4136 * 4137 * NOTE: You may pass NULL for localaddr, but then you will just get 4138 * the first STA that matches the remote address 'addr'. 4139 * We can have multiple STA associated with multiple 4140 * logical stations (e.g. consider a station connecting to another 4141 * BSSID on the same AP hardware without disconnecting first). 4142 * In this case, the result of this method with localaddr NULL 4143 * is not reliable. 4144 * 4145 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4146 */ 4147struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4148 const u8 *addr, 4149 const u8 *localaddr); 4150 4151/** 4152 * ieee80211_sta_block_awake - block station from waking up 4153 * @hw: the hardware 4154 * @pubsta: the station 4155 * @block: whether to block or unblock 4156 * 4157 * Some devices require that all frames that are on the queues 4158 * for a specific station that went to sleep are flushed before 4159 * a poll response or frames after the station woke up can be 4160 * delivered to that it. Note that such frames must be rejected 4161 * by the driver as filtered, with the appropriate status flag. 4162 * 4163 * This function allows implementing this mode in a race-free 4164 * manner. 4165 * 4166 * To do this, a driver must keep track of the number of frames 4167 * still enqueued for a specific station. If this number is not 4168 * zero when the station goes to sleep, the driver must call 4169 * this function to force mac80211 to consider the station to 4170 * be asleep regardless of the station's actual state. Once the 4171 * number of outstanding frames reaches zero, the driver must 4172 * call this function again to unblock the station. That will 4173 * cause mac80211 to be able to send ps-poll responses, and if 4174 * the station queried in the meantime then frames will also 4175 * be sent out as a result of this. Additionally, the driver 4176 * will be notified that the station woke up some time after 4177 * it is unblocked, regardless of whether the station actually 4178 * woke up while blocked or not. 4179 */ 4180void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4181 struct ieee80211_sta *pubsta, bool block); 4182 4183/** 4184 * ieee80211_sta_eosp - notify mac80211 about end of SP 4185 * @pubsta: the station 4186 * 4187 * When a device transmits frames in a way that it can't tell 4188 * mac80211 in the TX status about the EOSP, it must clear the 4189 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 4190 * This applies for PS-Poll as well as uAPSD. 4191 * 4192 * Note that just like with _tx_status() and _rx() drivers must 4193 * not mix calls to irqsafe/non-irqsafe versions, this function 4194 * must not be mixed with those either. Use the all irqsafe, or 4195 * all non-irqsafe, don't mix! 4196 * 4197 * NB: the _irqsafe version of this function doesn't exist, no 4198 * driver needs it right now. Don't call this function if 4199 * you'd need the _irqsafe version, look at the git history 4200 * and restore the _irqsafe version! 4201 */ 4202void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 4203 4204/** 4205 * ieee80211_iter_keys - iterate keys programmed into the device 4206 * @hw: pointer obtained from ieee80211_alloc_hw() 4207 * @vif: virtual interface to iterate, may be %NULL for all 4208 * @iter: iterator function that will be called for each key 4209 * @iter_data: custom data to pass to the iterator function 4210 * 4211 * This function can be used to iterate all the keys known to 4212 * mac80211, even those that weren't previously programmed into 4213 * the device. This is intended for use in WoWLAN if the device 4214 * needs reprogramming of the keys during suspend. Note that due 4215 * to locking reasons, it is also only safe to call this at few 4216 * spots since it must hold the RTNL and be able to sleep. 4217 * 4218 * The order in which the keys are iterated matches the order 4219 * in which they were originally installed and handed to the 4220 * set_key callback. 4221 */ 4222void ieee80211_iter_keys(struct ieee80211_hw *hw, 4223 struct ieee80211_vif *vif, 4224 void (*iter)(struct ieee80211_hw *hw, 4225 struct ieee80211_vif *vif, 4226 struct ieee80211_sta *sta, 4227 struct ieee80211_key_conf *key, 4228 void *data), 4229 void *iter_data); 4230 4231/** 4232 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 4233 * @hw: pointre obtained from ieee80211_alloc_hw(). 4234 * @iter: iterator function 4235 * @iter_data: data passed to iterator function 4236 * 4237 * Iterate all active channel contexts. This function is atomic and 4238 * doesn't acquire any locks internally that might be held in other 4239 * places while calling into the driver. 4240 * 4241 * The iterator will not find a context that's being added (during 4242 * the driver callback to add it) but will find it while it's being 4243 * removed. 4244 * 4245 * Note that during hardware restart, all contexts that existed 4246 * before the restart are considered already present so will be 4247 * found while iterating, whether they've been re-added already 4248 * or not. 4249 */ 4250void ieee80211_iter_chan_contexts_atomic( 4251 struct ieee80211_hw *hw, 4252 void (*iter)(struct ieee80211_hw *hw, 4253 struct ieee80211_chanctx_conf *chanctx_conf, 4254 void *data), 4255 void *iter_data); 4256 4257/** 4258 * ieee80211_ap_probereq_get - retrieve a Probe Request template 4259 * @hw: pointer obtained from ieee80211_alloc_hw(). 4260 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4261 * 4262 * Creates a Probe Request template which can, for example, be uploaded to 4263 * hardware. The template is filled with bssid, ssid and supported rate 4264 * information. This function must only be called from within the 4265 * .bss_info_changed callback function and only in managed mode. The function 4266 * is only useful when the interface is associated, otherwise it will return 4267 * %NULL. 4268 * 4269 * Return: The Probe Request template. %NULL on error. 4270 */ 4271struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4272 struct ieee80211_vif *vif); 4273 4274/** 4275 * ieee80211_beacon_loss - inform hardware does not receive beacons 4276 * 4277 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4278 * 4279 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 4280 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 4281 * hardware is not receiving beacons with this function. 4282 */ 4283void ieee80211_beacon_loss(struct ieee80211_vif *vif); 4284 4285/** 4286 * ieee80211_connection_loss - inform hardware has lost connection to the AP 4287 * 4288 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4289 * 4290 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 4291 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 4292 * needs to inform if the connection to the AP has been lost. 4293 * The function may also be called if the connection needs to be terminated 4294 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 4295 * 4296 * This function will cause immediate change to disassociated state, 4297 * without connection recovery attempts. 4298 */ 4299void ieee80211_connection_loss(struct ieee80211_vif *vif); 4300 4301/** 4302 * ieee80211_resume_disconnect - disconnect from AP after resume 4303 * 4304 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4305 * 4306 * Instructs mac80211 to disconnect from the AP after resume. 4307 * Drivers can use this after WoWLAN if they know that the 4308 * connection cannot be kept up, for example because keys were 4309 * used while the device was asleep but the replay counters or 4310 * similar cannot be retrieved from the device during resume. 4311 * 4312 * Note that due to implementation issues, if the driver uses 4313 * the reconfiguration functionality during resume the interface 4314 * will still be added as associated first during resume and then 4315 * disconnect normally later. 4316 * 4317 * This function can only be called from the resume callback and 4318 * the driver must not be holding any of its own locks while it 4319 * calls this function, or at least not any locks it needs in the 4320 * key configuration paths (if it supports HW crypto). 4321 */ 4322void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 4323 4324/** 4325 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 4326 * rssi threshold triggered 4327 * 4328 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4329 * @rssi_event: the RSSI trigger event type 4330 * @gfp: context flags 4331 * 4332 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 4333 * monitoring is configured with an rssi threshold, the driver will inform 4334 * whenever the rssi level reaches the threshold. 4335 */ 4336void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4337 enum nl80211_cqm_rssi_threshold_event rssi_event, 4338 gfp_t gfp); 4339 4340/** 4341 * ieee80211_radar_detected - inform that a radar was detected 4342 * 4343 * @hw: pointer as obtained from ieee80211_alloc_hw() 4344 */ 4345void ieee80211_radar_detected(struct ieee80211_hw *hw); 4346 4347/** 4348 * ieee80211_chswitch_done - Complete channel switch process 4349 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4350 * @success: make the channel switch successful or not 4351 * 4352 * Complete the channel switch post-process: set the new operational channel 4353 * and wake up the suspended queues. 4354 */ 4355void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 4356 4357/** 4358 * ieee80211_request_smps - request SM PS transition 4359 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4360 * @smps_mode: new SM PS mode 4361 * 4362 * This allows the driver to request an SM PS transition in managed 4363 * mode. This is useful when the driver has more information than 4364 * the stack about possible interference, for example by bluetooth. 4365 */ 4366void ieee80211_request_smps(struct ieee80211_vif *vif, 4367 enum ieee80211_smps_mode smps_mode); 4368 4369/** 4370 * ieee80211_ready_on_channel - notification of remain-on-channel start 4371 * @hw: pointer as obtained from ieee80211_alloc_hw() 4372 */ 4373void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4374 4375/** 4376 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4377 * @hw: pointer as obtained from ieee80211_alloc_hw() 4378 */ 4379void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4380 4381/** 4382 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4383 * 4384 * in order not to harm the system performance and user experience, the device 4385 * may request not to allow any rx ba session and tear down existing rx ba 4386 * sessions based on system constraints such as periodic BT activity that needs 4387 * to limit wlan activity (eg.sco or a2dp)." 4388 * in such cases, the intention is to limit the duration of the rx ppdu and 4389 * therefore prevent the peer device to use a-mpdu aggregation. 4390 * 4391 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4392 * @ba_rx_bitmap: Bit map of open rx ba per tid 4393 * @addr: & to bssid mac address 4394 */ 4395void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4396 const u8 *addr); 4397 4398/** 4399 * ieee80211_send_bar - send a BlockAckReq frame 4400 * 4401 * can be used to flush pending frames from the peer's aggregation reorder 4402 * buffer. 4403 * 4404 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4405 * @ra: the peer's destination address 4406 * @tid: the TID of the aggregation session 4407 * @ssn: the new starting sequence number for the receiver 4408 */ 4409void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4410 4411/* Rate control API */ 4412 4413/** 4414 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4415 * 4416 * @hw: The hardware the algorithm is invoked for. 4417 * @sband: The band this frame is being transmitted on. 4418 * @bss_conf: the current BSS configuration 4419 * @skb: the skb that will be transmitted, the control information in it needs 4420 * to be filled in 4421 * @reported_rate: The rate control algorithm can fill this in to indicate 4422 * which rate should be reported to userspace as the current rate and 4423 * used for rate calculations in the mesh network. 4424 * @rts: whether RTS will be used for this frame because it is longer than the 4425 * RTS threshold 4426 * @short_preamble: whether mac80211 will request short-preamble transmission 4427 * if the selected rate supports it 4428 * @max_rate_idx: user-requested maximum (legacy) rate 4429 * (deprecated; this will be removed once drivers get updated to use 4430 * rate_idx_mask) 4431 * @rate_idx_mask: user-requested (legacy) rate mask 4432 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 4433 * @bss: whether this frame is sent out in AP or IBSS mode 4434 */ 4435struct ieee80211_tx_rate_control { 4436 struct ieee80211_hw *hw; 4437 struct ieee80211_supported_band *sband; 4438 struct ieee80211_bss_conf *bss_conf; 4439 struct sk_buff *skb; 4440 struct ieee80211_tx_rate reported_rate; 4441 bool rts, short_preamble; 4442 u8 max_rate_idx; 4443 u32 rate_idx_mask; 4444 u8 *rate_idx_mcs_mask; 4445 bool bss; 4446}; 4447 4448struct rate_control_ops { 4449 struct module *module; 4450 const char *name; 4451 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4452 void (*free)(void *priv); 4453 4454 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4455 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4456 struct cfg80211_chan_def *chandef, 4457 struct ieee80211_sta *sta, void *priv_sta); 4458 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4459 struct cfg80211_chan_def *chandef, 4460 struct ieee80211_sta *sta, void *priv_sta, 4461 u32 changed); 4462 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4463 void *priv_sta); 4464 4465 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4466 struct ieee80211_sta *sta, void *priv_sta, 4467 struct sk_buff *skb); 4468 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4469 struct ieee80211_tx_rate_control *txrc); 4470 4471 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4472 struct dentry *dir); 4473 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4474}; 4475 4476static inline int rate_supported(struct ieee80211_sta *sta, 4477 enum ieee80211_band band, 4478 int index) 4479{ 4480 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4481} 4482 4483/** 4484 * rate_control_send_low - helper for drivers for management/no-ack frames 4485 * 4486 * Rate control algorithms that agree to use the lowest rate to 4487 * send management frames and NO_ACK data with the respective hw 4488 * retries should use this in the beginning of their mac80211 get_rate 4489 * callback. If true is returned the rate control can simply return. 4490 * If false is returned we guarantee that sta and sta and priv_sta is 4491 * not null. 4492 * 4493 * Rate control algorithms wishing to do more intelligent selection of 4494 * rate for multicast/broadcast frames may choose to not use this. 4495 * 4496 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4497 * that this may be null. 4498 * @priv_sta: private rate control structure. This may be null. 4499 * @txrc: rate control information we sholud populate for mac80211. 4500 */ 4501bool rate_control_send_low(struct ieee80211_sta *sta, 4502 void *priv_sta, 4503 struct ieee80211_tx_rate_control *txrc); 4504 4505 4506static inline s8 4507rate_lowest_index(struct ieee80211_supported_band *sband, 4508 struct ieee80211_sta *sta) 4509{ 4510 int i; 4511 4512 for (i = 0; i < sband->n_bitrates; i++) 4513 if (rate_supported(sta, sband->band, i)) 4514 return i; 4515 4516 /* warn when we cannot find a rate. */ 4517 WARN_ON_ONCE(1); 4518 4519 /* and return 0 (the lowest index) */ 4520 return 0; 4521} 4522 4523static inline 4524bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4525 struct ieee80211_sta *sta) 4526{ 4527 unsigned int i; 4528 4529 for (i = 0; i < sband->n_bitrates; i++) 4530 if (rate_supported(sta, sband->band, i)) 4531 return true; 4532 return false; 4533} 4534 4535/** 4536 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 4537 * 4538 * When not doing a rate control probe to test rates, rate control should pass 4539 * its rate selection to mac80211. If the driver supports receiving a station 4540 * rate table, it will use it to ensure that frames are always sent based on 4541 * the most recent rate control module decision. 4542 * 4543 * @hw: pointer as obtained from ieee80211_alloc_hw() 4544 * @pubsta: &struct ieee80211_sta pointer to the target destination. 4545 * @rates: new tx rate set to be used for this station. 4546 */ 4547int rate_control_set_rates(struct ieee80211_hw *hw, 4548 struct ieee80211_sta *pubsta, 4549 struct ieee80211_sta_rates *rates); 4550 4551int ieee80211_rate_control_register(struct rate_control_ops *ops); 4552void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4553 4554static inline bool 4555conf_is_ht20(struct ieee80211_conf *conf) 4556{ 4557 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 4558} 4559 4560static inline bool 4561conf_is_ht40_minus(struct ieee80211_conf *conf) 4562{ 4563 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4564 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 4565} 4566 4567static inline bool 4568conf_is_ht40_plus(struct ieee80211_conf *conf) 4569{ 4570 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4571 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 4572} 4573 4574static inline bool 4575conf_is_ht40(struct ieee80211_conf *conf) 4576{ 4577 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 4578} 4579 4580static inline bool 4581conf_is_ht(struct ieee80211_conf *conf) 4582{ 4583 return conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT; 4584} 4585 4586static inline enum nl80211_iftype 4587ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4588{ 4589 if (p2p) { 4590 switch (type) { 4591 case NL80211_IFTYPE_STATION: 4592 return NL80211_IFTYPE_P2P_CLIENT; 4593 case NL80211_IFTYPE_AP: 4594 return NL80211_IFTYPE_P2P_GO; 4595 default: 4596 break; 4597 } 4598 } 4599 return type; 4600} 4601 4602static inline enum nl80211_iftype 4603ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4604{ 4605 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4606} 4607 4608void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4609 int rssi_min_thold, 4610 int rssi_max_thold); 4611 4612void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4613 4614/** 4615 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4616 * 4617 * @vif: the specified virtual interface 4618 * 4619 * Note: This function assumes that the given vif is valid. 4620 * 4621 * Return: The average RSSI value for the requested interface, or 0 if not 4622 * applicable. 4623 */ 4624int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4625 4626/** 4627 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4628 * @vif: virtual interface 4629 * @wakeup: wakeup reason(s) 4630 * @gfp: allocation flags 4631 * 4632 * See cfg80211_report_wowlan_wakeup(). 4633 */ 4634void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4635 struct cfg80211_wowlan_wakeup *wakeup, 4636 gfp_t gfp); 4637 4638/** 4639 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 4640 * @hw: pointer as obtained from ieee80211_alloc_hw() 4641 * @vif: virtual interface 4642 * @skb: frame to be sent from within the driver 4643 * @band: the band to transmit on 4644 * @sta: optional pointer to get the station to send the frame to 4645 * 4646 * Note: must be called under RCU lock 4647 */ 4648bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 4649 struct ieee80211_vif *vif, struct sk_buff *skb, 4650 int band, struct ieee80211_sta **sta); 4651 4652/** 4653 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 4654 * 4655 * @next_tsf: TSF timestamp of the next absent state change 4656 * @has_next_tsf: next absent state change event pending 4657 * 4658 * @absent: descriptor bitmask, set if GO is currently absent 4659 * 4660 * private: 4661 * 4662 * @count: count fields from the NoA descriptors 4663 * @desc: adjusted data from the NoA 4664 */ 4665struct ieee80211_noa_data { 4666 u32 next_tsf; 4667 bool has_next_tsf; 4668 4669 u8 absent; 4670 4671 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 4672 struct { 4673 u32 start; 4674 u32 duration; 4675 u32 interval; 4676 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 4677}; 4678 4679/** 4680 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 4681 * 4682 * @attr: P2P NoA IE 4683 * @data: NoA tracking data 4684 * @tsf: current TSF timestamp 4685 * 4686 * Return: number of successfully parsed descriptors 4687 */ 4688int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4689 struct ieee80211_noa_data *data, u32 tsf); 4690 4691/** 4692 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 4693 * 4694 * @data: NoA tracking data 4695 * @tsf: current TSF timestamp 4696 */ 4697void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 4698 4699#endif /* MAC80211_H */ 4700