mac80211.h revision 2e92e6f2c50b4baf85cca968f0e6f1b5c0df7d39
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 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/kernel.h> 17#include <linux/if_ether.h> 18#include <linux/skbuff.h> 19#include <linux/wireless.h> 20#include <linux/device.h> 21#include <linux/ieee80211.h> 22#include <net/wireless.h> 23#include <net/cfg80211.h> 24 25/** 26 * DOC: Introduction 27 * 28 * mac80211 is the Linux stack for 802.11 hardware that implements 29 * only partial functionality in hard- or firmware. This document 30 * defines the interface between mac80211 and low-level hardware 31 * drivers. 32 */ 33 34/** 35 * DOC: Calling mac80211 from interrupts 36 * 37 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 38 * called in hardware interrupt context. The low-level driver must not call any 39 * other functions in hardware interrupt context. If there is a need for such 40 * call, the low-level driver should first ACK the interrupt and perform the 41 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 42 * tasklet function. 43 * 44 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 45 * use the non-irqsafe functions! 46 */ 47 48/** 49 * DOC: Warning 50 * 51 * If you're reading this document and not the header file itself, it will 52 * be incomplete because not all documentation has been converted yet. 53 */ 54 55/** 56 * DOC: Frame format 57 * 58 * As a general rule, when frames are passed between mac80211 and the driver, 59 * they start with the IEEE 802.11 header and include the same octets that are 60 * sent over the air except for the FCS which should be calculated by the 61 * hardware. 62 * 63 * There are, however, various exceptions to this rule for advanced features: 64 * 65 * The first exception is for hardware encryption and decryption offload 66 * where the IV/ICV may or may not be generated in hardware. 67 * 68 * Secondly, when the hardware handles fragmentation, the frame handed to 69 * the driver from mac80211 is the MSDU, not the MPDU. 70 * 71 * Finally, for received frames, the driver is able to indicate that it has 72 * filled a radiotap header and put that in front of the frame; if it does 73 * not do so then mac80211 may add this under certain circumstances. 74 */ 75 76/** 77 * enum ieee80211_notification_type - Low level driver notification 78 * @IEEE80211_NOTIFY_RE_ASSOC: start the re-association sequence 79 */ 80enum ieee80211_notification_types { 81 IEEE80211_NOTIFY_RE_ASSOC, 82}; 83 84/** 85 * struct ieee80211_ht_bss_info - describing BSS's HT characteristics 86 * 87 * This structure describes most essential parameters needed 88 * to describe 802.11n HT characteristics in a BSS 89 * 90 * @primary_channel: channel number of primery channel 91 * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width) 92 * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection) 93 */ 94struct ieee80211_ht_bss_info { 95 u8 primary_channel; 96 u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */ 97 u8 bss_op_mode; /* use IEEE80211_HT_IE_ */ 98}; 99 100/** 101 * enum ieee80211_max_queues - maximum number of queues 102 * 103 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 104 * @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable 105 * for A-MPDU operation. 106 */ 107enum ieee80211_max_queues { 108 IEEE80211_MAX_QUEUES = 16, 109 IEEE80211_MAX_AMPDU_QUEUES = 16, 110}; 111 112/** 113 * struct ieee80211_tx_queue_params - transmit queue configuration 114 * 115 * The information provided in this structure is required for QoS 116 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 117 * 118 * @aifs: arbitration interface space [0..255, -1: use default] 119 * @cw_min: minimum contention window [will be a value of the form 120 * 2^n-1 in the range 1..1023; 0: use default] 121 * @cw_max: maximum contention window [like @cw_min] 122 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 123 */ 124struct ieee80211_tx_queue_params { 125 s16 aifs; 126 u16 cw_min; 127 u16 cw_max; 128 u16 txop; 129}; 130 131/** 132 * struct ieee80211_tx_queue_stats - transmit queue statistics 133 * 134 * @len: number of packets in queue 135 * @limit: queue length limit 136 * @count: number of frames sent 137 */ 138struct ieee80211_tx_queue_stats { 139 unsigned int len; 140 unsigned int limit; 141 unsigned int count; 142}; 143 144struct ieee80211_low_level_stats { 145 unsigned int dot11ACKFailureCount; 146 unsigned int dot11RTSFailureCount; 147 unsigned int dot11FCSErrorCount; 148 unsigned int dot11RTSSuccessCount; 149}; 150 151/** 152 * enum ieee80211_bss_change - BSS change notification flags 153 * 154 * These flags are used with the bss_info_changed() callback 155 * to indicate which BSS parameter changed. 156 * 157 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 158 * also implies a change in the AID. 159 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 160 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 161 * @BSS_CHANGED_HT: 802.11n parameters changed 162 */ 163enum ieee80211_bss_change { 164 BSS_CHANGED_ASSOC = 1<<0, 165 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 166 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 167 BSS_CHANGED_HT = 1<<4, 168}; 169 170/** 171 * struct ieee80211_bss_conf - holds the BSS's changing parameters 172 * 173 * This structure keeps information about a BSS (and an association 174 * to that BSS) that can change during the lifetime of the BSS. 175 * 176 * @assoc: association status 177 * @aid: association ID number, valid only when @assoc is true 178 * @use_cts_prot: use CTS protection 179 * @use_short_preamble: use 802.11b short preamble 180 * @timestamp: beacon timestamp 181 * @beacon_int: beacon interval 182 * @assoc_capability: capabbilities taken from assoc resp 183 * @assoc_ht: association in HT mode 184 * @ht_conf: ht capabilities 185 * @ht_bss_conf: ht extended capabilities 186 */ 187struct ieee80211_bss_conf { 188 /* association related data */ 189 bool assoc; 190 u16 aid; 191 /* erp related data */ 192 bool use_cts_prot; 193 bool use_short_preamble; 194 u16 beacon_int; 195 u16 assoc_capability; 196 u64 timestamp; 197 /* ht related data */ 198 bool assoc_ht; 199 struct ieee80211_ht_info *ht_conf; 200 struct ieee80211_ht_bss_info *ht_bss_conf; 201}; 202 203/** 204 * enum mac80211_tx_control_flags - flags to describe Tx configuration for 205 * the Tx frame 206 * 207 * These flags are used with the @flags member of &ieee80211_tx_control 208 * 209 * @IEEE80211_TXCTL_REQ_TX_STATUS: request TX status callback for this frame. 210 * @IEEE80211_TXCTL_DO_NOT_ENCRYPT: send this frame without encryption; 211 * e.g., for EAPOL frame 212 * @IEEE80211_TXCTL_USE_RTS_CTS: use RTS-CTS before sending frame 213 * @IEEE80211_TXCTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 214 * for combined 802.11g / 802.11b networks) 215 * @IEEE80211_TXCTL_NO_ACK: tell the low level not to wait for an ack 216 * @IEEE80211_TXCTL_RATE_CTRL_PROBE 217 * @EEE80211_TXCTL_CLEAR_PS_FILT: clear powersave filter 218 * for destination station 219 * @IEEE80211_TXCTL_REQUEUE: 220 * @IEEE80211_TXCTL_FIRST_FRAGMENT: this is a first fragment of the frame 221 * @IEEE80211_TXCTL_LONG_RETRY_LIMIT: this frame should be send using the 222 * through set_retry_limit configured long 223 * retry value 224 * @IEEE80211_TXCTL_EAPOL_FRAME: internal to mac80211 225 * @IEEE80211_TXCTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 226 * @IEEE80211_TXCTL_AMPDU: this frame should be sent as part of an A-MPDU 227 * @IEEE80211_TXCTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 228 * of streams when this flag is on can be extracted 229 * from antenna_sel_tx, so if 1 antenna is marked 230 * use SISO, 2 antennas marked use MIMO, n antennas 231 * marked use MIMO_n. 232 * @IEEE80211_TXCTL_GREEN_FIELD: use green field protection for this frame 233 * @IEEE80211_TXCTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 234 * @IEEE80211_TXCTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 235 * @IEEE80211_TXCTL_SHORT_GI: send this frame using short guard interval 236 */ 237enum mac80211_tx_control_flags { 238 IEEE80211_TXCTL_REQ_TX_STATUS = (1<<0), 239 IEEE80211_TXCTL_DO_NOT_ENCRYPT = (1<<1), 240 IEEE80211_TXCTL_USE_RTS_CTS = (1<<2), 241 IEEE80211_TXCTL_USE_CTS_PROTECT = (1<<3), 242 IEEE80211_TXCTL_NO_ACK = (1<<4), 243 IEEE80211_TXCTL_RATE_CTRL_PROBE = (1<<5), 244 IEEE80211_TXCTL_CLEAR_PS_FILT = (1<<6), 245 IEEE80211_TXCTL_REQUEUE = (1<<7), 246 IEEE80211_TXCTL_FIRST_FRAGMENT = (1<<8), 247 IEEE80211_TXCTL_SHORT_PREAMBLE = (1<<9), 248 IEEE80211_TXCTL_LONG_RETRY_LIMIT = (1<<10), 249 IEEE80211_TXCTL_EAPOL_FRAME = (1<<11), 250 IEEE80211_TXCTL_SEND_AFTER_DTIM = (1<<12), 251 IEEE80211_TXCTL_AMPDU = (1<<13), 252 IEEE80211_TXCTL_OFDM_HT = (1<<14), 253 IEEE80211_TXCTL_GREEN_FIELD = (1<<15), 254 IEEE80211_TXCTL_40_MHZ_WIDTH = (1<<16), 255 IEEE80211_TXCTL_DUP_DATA = (1<<17), 256 IEEE80211_TXCTL_SHORT_GI = (1<<18), 257}; 258 259/* Transmit control fields. This data structure is passed to low-level driver 260 * with each TX frame. The low-level driver is responsible for configuring 261 * the hardware to use given values (depending on what is supported). 262 * 263 * NOTE: Be careful with using the pointers outside of the ieee80211_ops->tx() 264 * context (i.e. when defering the work to a workqueue). 265 * The vif pointer is valid until the it has been removed with the 266 * ieee80211_ops->remove_interface() callback funtion. 267 * The hw_key pointer is valid until it has been removed with the 268 * ieee80211_ops->set_key() callback function. 269 */ 270struct ieee80211_tx_control { 271 u32 flags; /* tx control flags defined above */ 272 273 s8 tx_rate_idx, /* Transmit rate (indexes registered rates) */ 274 rts_cts_rate_idx, /* Transmit rate for RTS/CTS frame */ 275 alt_retry_rate_idx; /* retry rate for the last retries */ 276 277 s8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. 278 * This could be used when set_retry_limit 279 * is not implemented by the driver */ 280 281 struct ieee80211_vif *vif; 282 283 /* Key used for hardware encryption 284 * NULL if IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */ 285 struct ieee80211_key_conf *hw_key; 286 287 enum ieee80211_band band; 288 289 u8 antenna_sel_tx; /* 0 = default/diversity, otherwise bit 290 * position represents antenna number used */ 291 u8 icv_len; /* length of the ICV/MIC field in octets */ 292 u8 iv_len; /* length of the IV field in octets */ 293 u16 queue; /* hardware queue to use for this frame; 294 * 0 = highest, hw->queues-1 = lowest */ 295 u16 aid; /* Station AID */ 296 int type; /* internal */ 297}; 298 299 300 301/** 302 * enum mac80211_rx_flags - receive flags 303 * 304 * These flags are used with the @flag member of &struct ieee80211_rx_status. 305 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 306 * Use together with %RX_FLAG_MMIC_STRIPPED. 307 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 308 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 309 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 310 * verification has been done by the hardware. 311 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 312 * If this flag is set, the stack cannot do any replay detection 313 * hence the driver or hardware will have to do that. 314 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 315 * the frame. 316 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 317 * the frame. 318 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 319 * is valid. This is useful in monitor mode and necessary for beacon frames 320 * to enable IBSS merging. 321 */ 322enum mac80211_rx_flags { 323 RX_FLAG_MMIC_ERROR = 1<<0, 324 RX_FLAG_DECRYPTED = 1<<1, 325 RX_FLAG_RADIOTAP = 1<<2, 326 RX_FLAG_MMIC_STRIPPED = 1<<3, 327 RX_FLAG_IV_STRIPPED = 1<<4, 328 RX_FLAG_FAILED_FCS_CRC = 1<<5, 329 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 330 RX_FLAG_TSFT = 1<<7, 331}; 332 333/** 334 * struct ieee80211_rx_status - receive status 335 * 336 * The low-level driver should provide this information (the subset 337 * supported by hardware) to the 802.11 code with each received 338 * frame. 339 * 340 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 341 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 342 * @band: the active band when this frame was received 343 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 344 * @signal: signal strength when receiving this frame, either in dBm, in dB or 345 * unspecified depending on the hardware capabilities flags 346 * @IEEE80211_HW_SIGNAL_* 347 * @noise: noise when receiving this frame, in dBm. 348 * @qual: overall signal quality indication, in percent (0-100). 349 * @antenna: antenna used 350 * @rate_idx: index of data rate into band's supported rates 351 * @flag: %RX_FLAG_* 352 */ 353struct ieee80211_rx_status { 354 u64 mactime; 355 enum ieee80211_band band; 356 int freq; 357 int signal; 358 int noise; 359 int qual; 360 int antenna; 361 int rate_idx; 362 int flag; 363}; 364 365/** 366 * enum ieee80211_tx_status_flags - transmit status flags 367 * 368 * Status flags to indicate various transmit conditions. 369 * 370 * @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted 371 * because the destination STA was in powersave mode. 372 * @IEEE80211_TX_STATUS_ACK: Frame was acknowledged 373 * @IEEE80211_TX_STATUS_AMPDU: The frame was aggregated, so status 374 * is for the whole aggregation. 375 */ 376enum ieee80211_tx_status_flags { 377 IEEE80211_TX_STATUS_TX_FILTERED = 1<<0, 378 IEEE80211_TX_STATUS_ACK = 1<<1, 379 IEEE80211_TX_STATUS_AMPDU = 1<<2, 380}; 381 382/** 383 * struct ieee80211_tx_status - transmit status 384 * 385 * As much information as possible should be provided for each transmitted 386 * frame with ieee80211_tx_status(). 387 * 388 * @control: a copy of the &struct ieee80211_tx_control passed to the driver 389 * in the tx() callback. 390 * @flags: transmit status flags, defined above 391 * @retry_count: number of retries 392 * @excessive_retries: set to 1 if the frame was retried many times 393 * but not acknowledged 394 * @ampdu_ack_len: number of aggregated frames. 395 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 396 * @ampdu_ack_map: block ack bit map for the aggregation. 397 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 398 * @ack_signal: signal strength of the ACK frame either in dBm, dB or unspec 399 * depending on hardware capabilites flags @IEEE80211_HW_SIGNAL_* 400 */ 401struct ieee80211_tx_status { 402 struct ieee80211_tx_control control; 403 u8 flags; 404 u8 retry_count; 405 bool excessive_retries; 406 u8 ampdu_ack_len; 407 u64 ampdu_ack_map; 408 int ack_signal; 409}; 410 411/** 412 * enum ieee80211_conf_flags - configuration flags 413 * 414 * Flags to define PHY configuration options 415 * 416 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 417 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 418 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 419 */ 420enum ieee80211_conf_flags { 421 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 422 IEEE80211_CONF_RADIOTAP = (1<<1), 423 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 424}; 425 426/** 427 * struct ieee80211_conf - configuration of the device 428 * 429 * This struct indicates how the driver shall configure the hardware. 430 * 431 * @radio_enabled: when zero, driver is required to switch off the radio. 432 * TODO make a flag 433 * @beacon_int: beacon interval (TODO make interface config) 434 * @flags: configuration flags defined above 435 * @power_level: requested transmit power (in dBm) 436 * @max_antenna_gain: maximum antenna gain (in dBi) 437 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 438 * 1/2: antenna 0/1 439 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 440 * @ht_conf: describes current self configuration of 802.11n HT capabilies 441 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 442 * @channel: the channel to tune to 443 */ 444struct ieee80211_conf { 445 int radio_enabled; 446 447 int beacon_int; 448 u32 flags; 449 int power_level; 450 int max_antenna_gain; 451 u8 antenna_sel_tx; 452 u8 antenna_sel_rx; 453 454 struct ieee80211_channel *channel; 455 456 struct ieee80211_ht_info ht_conf; 457 struct ieee80211_ht_bss_info ht_bss_conf; 458}; 459 460/** 461 * enum ieee80211_if_types - types of 802.11 network interfaces 462 * 463 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 464 * by mac80211 itself 465 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 466 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 467 * daemon. Drivers should never see this type. 468 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 469 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 470 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 471 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 472 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 473 * will never see this type. 474 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 475 */ 476enum ieee80211_if_types { 477 IEEE80211_IF_TYPE_INVALID, 478 IEEE80211_IF_TYPE_AP, 479 IEEE80211_IF_TYPE_STA, 480 IEEE80211_IF_TYPE_IBSS, 481 IEEE80211_IF_TYPE_MESH_POINT, 482 IEEE80211_IF_TYPE_MNTR, 483 IEEE80211_IF_TYPE_WDS, 484 IEEE80211_IF_TYPE_VLAN, 485}; 486 487/** 488 * struct ieee80211_vif - per-interface data 489 * 490 * Data in this structure is continually present for driver 491 * use during the life of a virtual interface. 492 * 493 * @type: type of this virtual interface 494 * @drv_priv: data area for driver use, will always be aligned to 495 * sizeof(void *). 496 */ 497struct ieee80211_vif { 498 enum ieee80211_if_types type; 499 /* must be last */ 500 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 501}; 502 503static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 504{ 505#ifdef CONFIG_MAC80211_MESH 506 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 507#endif 508 return false; 509} 510 511/** 512 * struct ieee80211_if_init_conf - initial configuration of an interface 513 * 514 * @vif: pointer to a driver-use per-interface structure. The pointer 515 * itself is also used for various functions including 516 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 517 * @type: one of &enum ieee80211_if_types constants. Determines the type of 518 * added/removed interface. 519 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 520 * until the interface is removed (i.e. it cannot be used after 521 * remove_interface() callback was called for this interface). 522 * 523 * This structure is used in add_interface() and remove_interface() 524 * callbacks of &struct ieee80211_hw. 525 * 526 * When you allow multiple interfaces to be added to your PHY, take care 527 * that the hardware can actually handle multiple MAC addresses. However, 528 * also take care that when there's no interface left with mac_addr != %NULL 529 * you remove the MAC address from the device to avoid acknowledging packets 530 * in pure monitor mode. 531 */ 532struct ieee80211_if_init_conf { 533 enum ieee80211_if_types type; 534 struct ieee80211_vif *vif; 535 void *mac_addr; 536}; 537 538/** 539 * struct ieee80211_if_conf - configuration of an interface 540 * 541 * @type: type of the interface. This is always the same as was specified in 542 * &struct ieee80211_if_init_conf. The type of an interface never changes 543 * during the life of the interface; this field is present only for 544 * convenience. 545 * @bssid: BSSID of the network we are associated to/creating. 546 * @ssid: used (together with @ssid_len) by drivers for hardware that 547 * generate beacons independently. The pointer is valid only during the 548 * config_interface() call, so copy the value somewhere if you need 549 * it. 550 * @ssid_len: length of the @ssid field. 551 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 552 * &struct ieee80211_hw is set. The driver is responsible of freeing 553 * the sk_buff. 554 * @beacon_control: tx_control for the beacon template, this field is only 555 * valid when the @beacon field was set. 556 * 557 * This structure is passed to the config_interface() callback of 558 * &struct ieee80211_hw. 559 */ 560struct ieee80211_if_conf { 561 int type; 562 u8 *bssid; 563 u8 *ssid; 564 size_t ssid_len; 565 struct sk_buff *beacon; 566 struct ieee80211_tx_control *beacon_control; 567}; 568 569/** 570 * enum ieee80211_key_alg - key algorithm 571 * @ALG_WEP: WEP40 or WEP104 572 * @ALG_TKIP: TKIP 573 * @ALG_CCMP: CCMP (AES) 574 */ 575enum ieee80211_key_alg { 576 ALG_WEP, 577 ALG_TKIP, 578 ALG_CCMP, 579}; 580 581 582/** 583 * enum ieee80211_key_flags - key flags 584 * 585 * These flags are used for communication about keys between the driver 586 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 587 * 588 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 589 * that the STA this key will be used with could be using QoS. 590 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 591 * driver to indicate that it requires IV generation for this 592 * particular key. 593 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 594 * the driver for a TKIP key if it requires Michael MIC 595 * generation in software. 596 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 597 * that the key is pairwise rather then a shared key. 598 */ 599enum ieee80211_key_flags { 600 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 601 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 602 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 603 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 604}; 605 606/** 607 * struct ieee80211_key_conf - key information 608 * 609 * This key information is given by mac80211 to the driver by 610 * the set_key() callback in &struct ieee80211_ops. 611 * 612 * @hw_key_idx: To be set by the driver, this is the key index the driver 613 * wants to be given when a frame is transmitted and needs to be 614 * encrypted in hardware. 615 * @alg: The key algorithm. 616 * @flags: key flags, see &enum ieee80211_key_flags. 617 * @keyidx: the key index (0-3) 618 * @keylen: key material length 619 * @key: key material 620 */ 621struct ieee80211_key_conf { 622 enum ieee80211_key_alg alg; 623 u8 hw_key_idx; 624 u8 flags; 625 s8 keyidx; 626 u8 keylen; 627 u8 key[0]; 628}; 629 630/** 631 * enum set_key_cmd - key command 632 * 633 * Used with the set_key() callback in &struct ieee80211_ops, this 634 * indicates whether a key is being removed or added. 635 * 636 * @SET_KEY: a key is set 637 * @DISABLE_KEY: a key must be disabled 638 */ 639enum set_key_cmd { 640 SET_KEY, DISABLE_KEY, 641}; 642 643/** 644 * enum sta_notify_cmd - sta notify command 645 * 646 * Used with the sta_notify() callback in &struct ieee80211_ops, this 647 * indicates addition and removal of a station to station table 648 * 649 * @STA_NOTIFY_ADD: a station was added to the station table 650 * @STA_NOTIFY_REMOVE: a station being removed from the station table 651 */ 652enum sta_notify_cmd { 653 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 654}; 655 656/** 657 * enum ieee80211_tkip_key_type - get tkip key 658 * 659 * Used by drivers which need to get a tkip key for skb. Some drivers need a 660 * phase 1 key, others need a phase 2 key. A single function allows the driver 661 * to get the key, this enum indicates what type of key is required. 662 * 663 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 664 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 665 */ 666enum ieee80211_tkip_key_type { 667 IEEE80211_TKIP_P1_KEY, 668 IEEE80211_TKIP_P2_KEY, 669}; 670 671/** 672 * enum ieee80211_hw_flags - hardware flags 673 * 674 * These flags are used to indicate hardware capabilities to 675 * the stack. Generally, flags here should have their meaning 676 * done in a way that the simplest hardware doesn't need setting 677 * any particular flags. There are some exceptions to this rule, 678 * however, so you are advised to review these flags carefully. 679 * 680 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE: 681 * The device only needs to be supplied with a beacon template. 682 * If you need the host to generate each beacon then don't use 683 * this flag and call ieee80211_beacon_get() when you need the 684 * next beacon frame. Note that if you set this flag, you must 685 * implement the set_tim() callback for powersave mode to work 686 * properly. 687 * This flag is only relevant for access-point mode. 688 * 689 * @IEEE80211_HW_RX_INCLUDES_FCS: 690 * Indicates that received frames passed to the stack include 691 * the FCS at the end. 692 * 693 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 694 * Some wireless LAN chipsets buffer broadcast/multicast frames 695 * for power saving stations in the hardware/firmware and others 696 * rely on the host system for such buffering. This option is used 697 * to configure the IEEE 802.11 upper layer to buffer broadcast and 698 * multicast frames when there are power saving stations so that 699 * the driver can fetch them with ieee80211_get_buffered_bc(). Note 700 * that not setting this flag works properly only when the 701 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because 702 * otherwise the stack will not know when the DTIM beacon was sent. 703 * 704 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 705 * Hardware is not capable of short slot operation on the 2.4 GHz band. 706 * 707 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 708 * Hardware is not capable of receiving frames with short preamble on 709 * the 2.4 GHz band. 710 * 711 * @IEEE80211_HW_SIGNAL_UNSPEC: 712 * Hardware can provide signal values but we don't know its units. We 713 * expect values between 0 and @max_signal. 714 * If possible please provide dB or dBm instead. 715 * 716 * @IEEE80211_HW_SIGNAL_DB: 717 * Hardware gives signal values in dB, decibel difference from an 718 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 719 * If possible please provide dBm instead. 720 * 721 * @IEEE80211_HW_SIGNAL_DBM: 722 * Hardware gives signal values in dBm, decibel difference from 723 * one milliwatt. This is the preferred method since it is standardized 724 * between different devices. @max_signal does not need to be set. 725 * 726 * @IEEE80211_HW_NOISE_DBM: 727 * Hardware can provide noise (radio interference) values in units dBm, 728 * decibel difference from one milliwatt. 729 */ 730enum ieee80211_hw_flags { 731 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 732 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 733 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 734 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 735 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 736 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 737 IEEE80211_HW_SIGNAL_DB = 1<<6, 738 IEEE80211_HW_SIGNAL_DBM = 1<<7, 739 IEEE80211_HW_NOISE_DBM = 1<<8, 740}; 741 742/** 743 * struct ieee80211_hw - hardware information and state 744 * 745 * This structure contains the configuration and hardware 746 * information for an 802.11 PHY. 747 * 748 * @wiphy: This points to the &struct wiphy allocated for this 749 * 802.11 PHY. You must fill in the @perm_addr and @dev 750 * members of this structure using SET_IEEE80211_DEV() 751 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 752 * bands (with channels, bitrates) are registered here. 753 * 754 * @conf: &struct ieee80211_conf, device configuration, don't use. 755 * 756 * @workqueue: single threaded workqueue available for driver use, 757 * allocated by mac80211 on registration and flushed on 758 * unregistration. 759 * 760 * @priv: pointer to private area that was allocated for driver use 761 * along with this structure. 762 * 763 * @flags: hardware flags, see &enum ieee80211_hw_flags. 764 * 765 * @extra_tx_headroom: headroom to reserve in each transmit skb 766 * for use by the driver (e.g. for transmit headers.) 767 * 768 * @channel_change_time: time (in microseconds) it takes to change channels. 769 * 770 * @max_signal: Maximum value for signal (rssi) in RX information, used 771 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 772 * 773 * @queues: number of available hardware transmit queues for 774 * data packets. WMM/QoS requires at least four, these 775 * queues need to have configurable access parameters. 776 * 777 * @ampdu_queues: number of available hardware transmit queues 778 * for A-MPDU packets, these have no access parameters 779 * because they're used only for A-MPDU frames. Note that 780 * mac80211 will not currently use any of the regular queues 781 * for aggregation. 782 * 783 * @rate_control_algorithm: rate control algorithm for this hardware. 784 * If unset (NULL), the default algorithm will be used. Must be 785 * set before calling ieee80211_register_hw(). 786 * 787 * @vif_data_size: size (in bytes) of the drv_priv data area 788 * within &struct ieee80211_vif. 789 */ 790struct ieee80211_hw { 791 struct ieee80211_conf conf; 792 struct wiphy *wiphy; 793 struct workqueue_struct *workqueue; 794 const char *rate_control_algorithm; 795 void *priv; 796 u32 flags; 797 unsigned int extra_tx_headroom; 798 int channel_change_time; 799 int vif_data_size; 800 u16 queues, ampdu_queues; 801 s8 max_signal; 802}; 803 804/** 805 * SET_IEEE80211_DEV - set device for 802.11 hardware 806 * 807 * @hw: the &struct ieee80211_hw to set the device for 808 * @dev: the &struct device of this 802.11 device 809 */ 810static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 811{ 812 set_wiphy_dev(hw->wiphy, dev); 813} 814 815/** 816 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 817 * 818 * @hw: the &struct ieee80211_hw to set the MAC address for 819 * @addr: the address to set 820 */ 821static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 822{ 823 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 824} 825 826static inline struct ieee80211_rate * 827ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 828 const struct ieee80211_tx_control *c) 829{ 830 if (WARN_ON(c->tx_rate_idx < 0)) 831 return NULL; 832 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 833} 834 835static inline struct ieee80211_rate * 836ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 837 const struct ieee80211_tx_control *c) 838{ 839 if (c->rts_cts_rate_idx < 0) 840 return NULL; 841 return &hw->wiphy->bands[c->band]->bitrates[c->rts_cts_rate_idx]; 842} 843 844static inline struct ieee80211_rate * 845ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 846 const struct ieee80211_tx_control *c) 847{ 848 if (c->alt_retry_rate_idx < 0) 849 return NULL; 850 return &hw->wiphy->bands[c->band]->bitrates[c->alt_retry_rate_idx]; 851} 852 853/** 854 * DOC: Hardware crypto acceleration 855 * 856 * mac80211 is capable of taking advantage of many hardware 857 * acceleration designs for encryption and decryption operations. 858 * 859 * The set_key() callback in the &struct ieee80211_ops for a given 860 * device is called to enable hardware acceleration of encryption and 861 * decryption. The callback takes an @address parameter that will be 862 * the broadcast address for default keys, the other station's hardware 863 * address for individual keys or the zero address for keys that will 864 * be used only for transmission. 865 * Multiple transmission keys with the same key index may be used when 866 * VLANs are configured for an access point. 867 * 868 * The @local_address parameter will always be set to our own address, 869 * this is only relevant if you support multiple local addresses. 870 * 871 * When transmitting, the TX control data will use the @hw_key_idx 872 * selected by the driver by modifying the &struct ieee80211_key_conf 873 * pointed to by the @key parameter to the set_key() function. 874 * 875 * The set_key() call for the %SET_KEY command should return 0 if 876 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 877 * added; if you return 0 then hw_key_idx must be assigned to the 878 * hardware key index, you are free to use the full u8 range. 879 * 880 * When the cmd is %DISABLE_KEY then it must succeed. 881 * 882 * Note that it is permissible to not decrypt a frame even if a key 883 * for it has been uploaded to hardware, the stack will not make any 884 * decision based on whether a key has been uploaded or not but rather 885 * based on the receive flags. 886 * 887 * The &struct ieee80211_key_conf structure pointed to by the @key 888 * parameter is guaranteed to be valid until another call to set_key() 889 * removes it, but it can only be used as a cookie to differentiate 890 * keys. 891 * 892 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 893 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 894 * handler. 895 * The update_tkip_key() call updates the driver with the new phase 1 key. 896 * This happens everytime the iv16 wraps around (every 65536 packets). The 897 * set_key() call will happen only once for each key (unless the AP did 898 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 899 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 900 * handler is software decryption with wrap around of iv16. 901 */ 902 903/** 904 * DOC: Frame filtering 905 * 906 * mac80211 requires to see many management frames for proper 907 * operation, and users may want to see many more frames when 908 * in monitor mode. However, for best CPU usage and power consumption, 909 * having as few frames as possible percolate through the stack is 910 * desirable. Hence, the hardware should filter as much as possible. 911 * 912 * To achieve this, mac80211 uses filter flags (see below) to tell 913 * the driver's configure_filter() function which frames should be 914 * passed to mac80211 and which should be filtered out. 915 * 916 * The configure_filter() callback is invoked with the parameters 917 * @mc_count and @mc_list for the combined multicast address list 918 * of all virtual interfaces, @changed_flags telling which flags 919 * were changed and @total_flags with the new flag states. 920 * 921 * If your device has no multicast address filters your driver will 922 * need to check both the %FIF_ALLMULTI flag and the @mc_count 923 * parameter to see whether multicast frames should be accepted 924 * or dropped. 925 * 926 * All unsupported flags in @total_flags must be cleared. 927 * Hardware does not support a flag if it is incapable of _passing_ 928 * the frame to the stack. Otherwise the driver must ignore 929 * the flag, but not clear it. 930 * You must _only_ clear the flag (announce no support for the 931 * flag to mac80211) if you are not able to pass the packet type 932 * to the stack (so the hardware always filters it). 933 * So for example, you should clear @FIF_CONTROL, if your hardware 934 * always filters control frames. If your hardware always passes 935 * control frames to the kernel and is incapable of filtering them, 936 * you do _not_ clear the @FIF_CONTROL flag. 937 * This rule applies to all other FIF flags as well. 938 */ 939 940/** 941 * enum ieee80211_filter_flags - hardware filter flags 942 * 943 * These flags determine what the filter in hardware should be 944 * programmed to let through and what should not be passed to the 945 * stack. It is always safe to pass more frames than requested, 946 * but this has negative impact on power consumption. 947 * 948 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 949 * think of the BSS as your network segment and then this corresponds 950 * to the regular ethernet device promiscuous mode. 951 * 952 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 953 * by the user or if the hardware is not capable of filtering by 954 * multicast address. 955 * 956 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 957 * %RX_FLAG_FAILED_FCS_CRC for them) 958 * 959 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 960 * the %RX_FLAG_FAILED_PLCP_CRC for them 961 * 962 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 963 * to the hardware that it should not filter beacons or probe responses 964 * by BSSID. Filtering them can greatly reduce the amount of processing 965 * mac80211 needs to do and the amount of CPU wakeups, so you should 966 * honour this flag if possible. 967 * 968 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 969 * only those addressed to this station 970 * 971 * @FIF_OTHER_BSS: pass frames destined to other BSSes 972 */ 973enum ieee80211_filter_flags { 974 FIF_PROMISC_IN_BSS = 1<<0, 975 FIF_ALLMULTI = 1<<1, 976 FIF_FCSFAIL = 1<<2, 977 FIF_PLCPFAIL = 1<<3, 978 FIF_BCN_PRBRESP_PROMISC = 1<<4, 979 FIF_CONTROL = 1<<5, 980 FIF_OTHER_BSS = 1<<6, 981}; 982 983/** 984 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 985 * 986 * These flags are used with the ampdu_action() callback in 987 * &struct ieee80211_ops to indicate which action is needed. 988 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 989 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 990 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 991 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 992 */ 993enum ieee80211_ampdu_mlme_action { 994 IEEE80211_AMPDU_RX_START, 995 IEEE80211_AMPDU_RX_STOP, 996 IEEE80211_AMPDU_TX_START, 997 IEEE80211_AMPDU_TX_STOP, 998}; 999 1000/** 1001 * struct ieee80211_ops - callbacks from mac80211 to the driver 1002 * 1003 * This structure contains various callbacks that the driver may 1004 * handle or, in some cases, must handle, for example to configure 1005 * the hardware to a new channel or to transmit a frame. 1006 * 1007 * @tx: Handler that 802.11 module calls for each transmitted frame. 1008 * skb contains the buffer starting from the IEEE 802.11 header. 1009 * The low-level driver should send the frame out based on 1010 * configuration in the TX control data. Must be implemented and 1011 * atomic. 1012 * 1013 * @start: Called before the first netdevice attached to the hardware 1014 * is enabled. This should turn on the hardware and must turn on 1015 * frame reception (for possibly enabled monitor interfaces.) 1016 * Returns negative error codes, these may be seen in userspace, 1017 * or zero. 1018 * When the device is started it should not have a MAC address 1019 * to avoid acknowledging frames before a non-monitor device 1020 * is added. 1021 * Must be implemented. 1022 * 1023 * @stop: Called after last netdevice attached to the hardware 1024 * is disabled. This should turn off the hardware (at least 1025 * it must turn off frame reception.) 1026 * May be called right after add_interface if that rejects 1027 * an interface. 1028 * Must be implemented. 1029 * 1030 * @add_interface: Called when a netdevice attached to the hardware is 1031 * enabled. Because it is not called for monitor mode devices, @open 1032 * and @stop must be implemented. 1033 * The driver should perform any initialization it needs before 1034 * the device can be enabled. The initial configuration for the 1035 * interface is given in the conf parameter. 1036 * The callback may refuse to add an interface by returning a 1037 * negative error code (which will be seen in userspace.) 1038 * Must be implemented. 1039 * 1040 * @remove_interface: Notifies a driver that an interface is going down. 1041 * The @stop callback is called after this if it is the last interface 1042 * and no monitor interfaces are present. 1043 * When all interfaces are removed, the MAC address in the hardware 1044 * must be cleared so the device no longer acknowledges packets, 1045 * the mac_addr member of the conf structure is, however, set to the 1046 * MAC address of the device going away. 1047 * Hence, this callback must be implemented. 1048 * 1049 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1050 * function to change hardware configuration, e.g., channel. 1051 * 1052 * @config_interface: Handler for configuration requests related to interfaces 1053 * (e.g. BSSID changes.) 1054 * 1055 * @bss_info_changed: Handler for configuration requests related to BSS 1056 * parameters that may vary during BSS's lifespan, and may affect low 1057 * level driver (e.g. assoc/disassoc status, erp parameters). 1058 * This function should not be used if no BSS has been set, unless 1059 * for association indication. The @changed parameter indicates which 1060 * of the bss parameters has changed when a call is made. 1061 * 1062 * @configure_filter: Configure the device's RX filter. 1063 * See the section "Frame filtering" for more information. 1064 * This callback must be implemented and atomic. 1065 * 1066 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon 1067 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set) 1068 * mac80211 calls this function when a TIM bit must be set or cleared 1069 * for a given AID. Must be atomic. 1070 * 1071 * @set_key: See the section "Hardware crypto acceleration" 1072 * This callback can sleep, and is only called between add_interface 1073 * and remove_interface calls, i.e. while the interface with the 1074 * given local_address is enabled. 1075 * 1076 * @update_tkip_key: See the section "Hardware crypto acceleration" 1077 * This callback will be called in the context of Rx. Called for drivers 1078 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1079 * 1080 * @hw_scan: Ask the hardware to service the scan request, no need to start 1081 * the scan state machine in stack. The scan must honour the channel 1082 * configuration done by the regulatory agent in the wiphy's registered 1083 * bands. 1084 * 1085 * @get_stats: return low-level statistics 1086 * 1087 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1088 * callback should be provided to read the TKIP transmit IVs (both IV32 1089 * and IV16) for the given key from hardware. 1090 * 1091 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1092 * 1093 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1094 * the device does fragmentation by itself; if this method is assigned then 1095 * the stack will not do fragmentation. 1096 * 1097 * @set_retry_limit: Configuration of retry limits (if device needs it) 1098 * 1099 * @sta_notify: Notifies low level driver about addition or removal 1100 * of assocaited station or AP. 1101 * 1102 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1103 * bursting) for a hardware TX queue. Must be atomic. 1104 * 1105 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1106 * to get number of currently queued packets (queue length), maximum queue 1107 * size (limit), and total number of packets sent using each TX queue 1108 * (count). The 'stats' pointer points to an array that has hw->queues + 1109 * hw->ampdu_queues items. 1110 * 1111 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1112 * this is only used for IBSS mode debugging and, as such, is not a 1113 * required function. Must be atomic. 1114 * 1115 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1116 * with other STAs in the IBSS. This is only used in IBSS mode. This 1117 * function is optional if the firmware/hardware takes full care of 1118 * TSF synchronization. 1119 * 1120 * @beacon_update: Setup beacon data for IBSS beacons. Unlike access point, 1121 * IBSS uses a fixed beacon frame which is configured using this 1122 * function. 1123 * If the driver returns success (0) from this callback, it owns 1124 * the skb. That means the driver is responsible to kfree_skb() it. 1125 * The control structure is not dynamically allocated. That means the 1126 * driver does not own the pointer and if it needs it somewhere 1127 * outside of the context of this function, it must copy it 1128 * somewhere else. 1129 * This handler is required only for IBSS mode. 1130 * 1131 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1132 * This is needed only for IBSS mode and the result of this function is 1133 * used to determine whether to reply to Probe Requests. 1134 * 1135 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1136 * 1137 * @ampdu_action: Perform a certain A-MPDU action 1138 * The RA/TID combination determines the destination and TID we want 1139 * the ampdu action to be performed for. The action is defined through 1140 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1141 * is the first frame we expect to perform the action on. notice 1142 * that TX/RX_STOP can pass NULL for this parameter. 1143 */ 1144struct ieee80211_ops { 1145 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, 1146 struct ieee80211_tx_control *control); 1147 int (*start)(struct ieee80211_hw *hw); 1148 void (*stop)(struct ieee80211_hw *hw); 1149 int (*add_interface)(struct ieee80211_hw *hw, 1150 struct ieee80211_if_init_conf *conf); 1151 void (*remove_interface)(struct ieee80211_hw *hw, 1152 struct ieee80211_if_init_conf *conf); 1153 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1154 int (*config_interface)(struct ieee80211_hw *hw, 1155 struct ieee80211_vif *vif, 1156 struct ieee80211_if_conf *conf); 1157 void (*bss_info_changed)(struct ieee80211_hw *hw, 1158 struct ieee80211_vif *vif, 1159 struct ieee80211_bss_conf *info, 1160 u32 changed); 1161 void (*configure_filter)(struct ieee80211_hw *hw, 1162 unsigned int changed_flags, 1163 unsigned int *total_flags, 1164 int mc_count, struct dev_addr_list *mc_list); 1165 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1166 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1167 const u8 *local_address, const u8 *address, 1168 struct ieee80211_key_conf *key); 1169 void (*update_tkip_key)(struct ieee80211_hw *hw, 1170 struct ieee80211_key_conf *conf, const u8 *address, 1171 u32 iv32, u16 *phase1key); 1172 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1173 int (*get_stats)(struct ieee80211_hw *hw, 1174 struct ieee80211_low_level_stats *stats); 1175 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1176 u32 *iv32, u16 *iv16); 1177 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1178 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1179 int (*set_retry_limit)(struct ieee80211_hw *hw, 1180 u32 short_retry, u32 long_retr); 1181 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1182 enum sta_notify_cmd, const u8 *addr); 1183 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1184 const struct ieee80211_tx_queue_params *params); 1185 int (*get_tx_stats)(struct ieee80211_hw *hw, 1186 struct ieee80211_tx_queue_stats *stats); 1187 u64 (*get_tsf)(struct ieee80211_hw *hw); 1188 void (*reset_tsf)(struct ieee80211_hw *hw); 1189 int (*beacon_update)(struct ieee80211_hw *hw, 1190 struct sk_buff *skb, 1191 struct ieee80211_tx_control *control); 1192 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1193 int (*ampdu_action)(struct ieee80211_hw *hw, 1194 enum ieee80211_ampdu_mlme_action action, 1195 const u8 *addr, u16 tid, u16 *ssn); 1196}; 1197 1198/** 1199 * ieee80211_alloc_hw - Allocate a new hardware device 1200 * 1201 * This must be called once for each hardware device. The returned pointer 1202 * must be used to refer to this device when calling other functions. 1203 * mac80211 allocates a private data area for the driver pointed to by 1204 * @priv in &struct ieee80211_hw, the size of this area is given as 1205 * @priv_data_len. 1206 * 1207 * @priv_data_len: length of private data 1208 * @ops: callbacks for this device 1209 */ 1210struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1211 const struct ieee80211_ops *ops); 1212 1213/** 1214 * ieee80211_register_hw - Register hardware device 1215 * 1216 * You must call this function before any other functions in 1217 * mac80211. Note that before a hardware can be registered, you 1218 * need to fill the contained wiphy's information. 1219 * 1220 * @hw: the device to register as returned by ieee80211_alloc_hw() 1221 */ 1222int ieee80211_register_hw(struct ieee80211_hw *hw); 1223 1224#ifdef CONFIG_MAC80211_LEDS 1225extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1226extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1227extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1228extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1229#endif 1230/** 1231 * ieee80211_get_tx_led_name - get name of TX LED 1232 * 1233 * mac80211 creates a transmit LED trigger for each wireless hardware 1234 * that can be used to drive LEDs if your driver registers a LED device. 1235 * This function returns the name (or %NULL if not configured for LEDs) 1236 * of the trigger so you can automatically link the LED device. 1237 * 1238 * @hw: the hardware to get the LED trigger name for 1239 */ 1240static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1241{ 1242#ifdef CONFIG_MAC80211_LEDS 1243 return __ieee80211_get_tx_led_name(hw); 1244#else 1245 return NULL; 1246#endif 1247} 1248 1249/** 1250 * ieee80211_get_rx_led_name - get name of RX LED 1251 * 1252 * mac80211 creates a receive LED trigger for each wireless hardware 1253 * that can be used to drive LEDs if your driver registers a LED device. 1254 * This function returns the name (or %NULL if not configured for LEDs) 1255 * of the trigger so you can automatically link the LED device. 1256 * 1257 * @hw: the hardware to get the LED trigger name for 1258 */ 1259static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1260{ 1261#ifdef CONFIG_MAC80211_LEDS 1262 return __ieee80211_get_rx_led_name(hw); 1263#else 1264 return NULL; 1265#endif 1266} 1267 1268/** 1269 * ieee80211_get_assoc_led_name - get name of association LED 1270 * 1271 * mac80211 creates a association LED trigger for each wireless hardware 1272 * that can be used to drive LEDs if your driver registers a LED device. 1273 * This function returns the name (or %NULL if not configured for LEDs) 1274 * of the trigger so you can automatically link the LED device. 1275 * 1276 * @hw: the hardware to get the LED trigger name for 1277 */ 1278static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1279{ 1280#ifdef CONFIG_MAC80211_LEDS 1281 return __ieee80211_get_assoc_led_name(hw); 1282#else 1283 return NULL; 1284#endif 1285} 1286 1287/** 1288 * ieee80211_get_radio_led_name - get name of radio LED 1289 * 1290 * mac80211 creates a radio change LED trigger for each wireless hardware 1291 * that can be used to drive LEDs if your driver registers a LED device. 1292 * This function returns the name (or %NULL if not configured for LEDs) 1293 * of the trigger so you can automatically link the LED device. 1294 * 1295 * @hw: the hardware to get the LED trigger name for 1296 */ 1297static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1298{ 1299#ifdef CONFIG_MAC80211_LEDS 1300 return __ieee80211_get_radio_led_name(hw); 1301#else 1302 return NULL; 1303#endif 1304} 1305 1306/** 1307 * ieee80211_unregister_hw - Unregister a hardware device 1308 * 1309 * This function instructs mac80211 to free allocated resources 1310 * and unregister netdevices from the networking subsystem. 1311 * 1312 * @hw: the hardware to unregister 1313 */ 1314void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1315 1316/** 1317 * ieee80211_free_hw - free hardware descriptor 1318 * 1319 * This function frees everything that was allocated, including the 1320 * private data for the driver. You must call ieee80211_unregister_hw() 1321 * before calling this function 1322 * 1323 * @hw: the hardware to free 1324 */ 1325void ieee80211_free_hw(struct ieee80211_hw *hw); 1326 1327/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1328void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1329 struct ieee80211_rx_status *status); 1330 1331/** 1332 * ieee80211_rx - receive frame 1333 * 1334 * Use this function to hand received frames to mac80211. The receive 1335 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1336 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1337 * 1338 * This function may not be called in IRQ context. Calls to this function 1339 * for a single hardware must be synchronized against each other. Calls 1340 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1341 * single hardware. 1342 * 1343 * @hw: the hardware this frame came in on 1344 * @skb: the buffer to receive, owned by mac80211 after this call 1345 * @status: status of this frame; the status pointer need not be valid 1346 * after this function returns 1347 */ 1348static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1349 struct ieee80211_rx_status *status) 1350{ 1351 __ieee80211_rx(hw, skb, status); 1352} 1353 1354/** 1355 * ieee80211_rx_irqsafe - receive frame 1356 * 1357 * Like ieee80211_rx() but can be called in IRQ context 1358 * (internally defers to a tasklet.) 1359 * 1360 * Calls to this function and ieee80211_rx() may not be mixed for a 1361 * single hardware. 1362 * 1363 * @hw: the hardware this frame came in on 1364 * @skb: the buffer to receive, owned by mac80211 after this call 1365 * @status: status of this frame; the status pointer need not be valid 1366 * after this function returns and is not freed by mac80211, 1367 * it is recommended that it points to a stack area 1368 */ 1369void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1370 struct sk_buff *skb, 1371 struct ieee80211_rx_status *status); 1372 1373/** 1374 * ieee80211_tx_status - transmit status callback 1375 * 1376 * Call this function for all transmitted frames after they have been 1377 * transmitted. It is permissible to not call this function for 1378 * multicast frames but this can affect statistics. 1379 * 1380 * This function may not be called in IRQ context. Calls to this function 1381 * for a single hardware must be synchronized against each other. Calls 1382 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1383 * for a single hardware. 1384 * 1385 * @hw: the hardware the frame was transmitted by 1386 * @skb: the frame that was transmitted, owned by mac80211 after this call 1387 * @status: status information for this frame; the status pointer need not 1388 * be valid after this function returns and is not freed by mac80211, 1389 * it is recommended that it points to a stack area 1390 */ 1391void ieee80211_tx_status(struct ieee80211_hw *hw, 1392 struct sk_buff *skb, 1393 struct ieee80211_tx_status *status); 1394 1395/** 1396 * ieee80211_tx_status_irqsafe - irq-safe transmit status callback 1397 * 1398 * Like ieee80211_tx_status() but can be called in IRQ context 1399 * (internally defers to a tasklet.) 1400 * 1401 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1402 * single hardware. 1403 * 1404 * @hw: the hardware the frame was transmitted by 1405 * @skb: the frame that was transmitted, owned by mac80211 after this call 1406 * @status: status information for this frame; the status pointer need not 1407 * be valid after this function returns and is not freed by mac80211, 1408 * it is recommended that it points to a stack area 1409 */ 1410void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1411 struct sk_buff *skb, 1412 struct ieee80211_tx_status *status); 1413 1414/** 1415 * ieee80211_beacon_get - beacon generation function 1416 * @hw: pointer obtained from ieee80211_alloc_hw(). 1417 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1418 * @control: will be filled with information needed to send this beacon. 1419 * 1420 * If the beacon frames are generated by the host system (i.e., not in 1421 * hardware/firmware), the low-level driver uses this function to receive 1422 * the next beacon frame from the 802.11 code. The low-level is responsible 1423 * for calling this function before beacon data is needed (e.g., based on 1424 * hardware interrupt). Returned skb is used only once and low-level driver 1425 * is responsible of freeing it. 1426 */ 1427struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1428 struct ieee80211_vif *vif, 1429 struct ieee80211_tx_control *control); 1430 1431/** 1432 * ieee80211_rts_get - RTS frame generation function 1433 * @hw: pointer obtained from ieee80211_alloc_hw(). 1434 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1435 * @frame: pointer to the frame that is going to be protected by the RTS. 1436 * @frame_len: the frame length (in octets). 1437 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1438 * @rts: The buffer where to store the RTS frame. 1439 * 1440 * If the RTS frames are generated by the host system (i.e., not in 1441 * hardware/firmware), the low-level driver uses this function to receive 1442 * the next RTS frame from the 802.11 code. The low-level is responsible 1443 * for calling this function before and RTS frame is needed. 1444 */ 1445void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1446 const void *frame, size_t frame_len, 1447 const struct ieee80211_tx_control *frame_txctl, 1448 struct ieee80211_rts *rts); 1449 1450/** 1451 * ieee80211_rts_duration - Get the duration field for an RTS frame 1452 * @hw: pointer obtained from ieee80211_alloc_hw(). 1453 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1454 * @frame_len: the length of the frame that is going to be protected by the RTS. 1455 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1456 * 1457 * If the RTS is generated in firmware, but the host system must provide 1458 * the duration field, the low-level driver uses this function to receive 1459 * the duration field value in little-endian byteorder. 1460 */ 1461__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1462 struct ieee80211_vif *vif, size_t frame_len, 1463 const struct ieee80211_tx_control *frame_txctl); 1464 1465/** 1466 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1467 * @hw: pointer obtained from ieee80211_alloc_hw(). 1468 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1469 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1470 * @frame_len: the frame length (in octets). 1471 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1472 * @cts: The buffer where to store the CTS-to-self frame. 1473 * 1474 * If the CTS-to-self frames are generated by the host system (i.e., not in 1475 * hardware/firmware), the low-level driver uses this function to receive 1476 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1477 * for calling this function before and CTS-to-self frame is needed. 1478 */ 1479void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1480 struct ieee80211_vif *vif, 1481 const void *frame, size_t frame_len, 1482 const struct ieee80211_tx_control *frame_txctl, 1483 struct ieee80211_cts *cts); 1484 1485/** 1486 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1487 * @hw: pointer obtained from ieee80211_alloc_hw(). 1488 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1489 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1490 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1491 * 1492 * If the CTS-to-self is generated in firmware, but the host system must provide 1493 * the duration field, the low-level driver uses this function to receive 1494 * the duration field value in little-endian byteorder. 1495 */ 1496__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1497 struct ieee80211_vif *vif, 1498 size_t frame_len, 1499 const struct ieee80211_tx_control *frame_txctl); 1500 1501/** 1502 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1503 * @hw: pointer obtained from ieee80211_alloc_hw(). 1504 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1505 * @frame_len: the length of the frame. 1506 * @rate: the rate at which the frame is going to be transmitted. 1507 * 1508 * Calculate the duration field of some generic frame, given its 1509 * length and transmission rate (in 100kbps). 1510 */ 1511__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1512 struct ieee80211_vif *vif, 1513 size_t frame_len, 1514 struct ieee80211_rate *rate); 1515 1516/** 1517 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1518 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1519 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1520 * @control: will be filled with information needed to send returned frame. 1521 * 1522 * Function for accessing buffered broadcast and multicast frames. If 1523 * hardware/firmware does not implement buffering of broadcast/multicast 1524 * frames when power saving is used, 802.11 code buffers them in the host 1525 * memory. The low-level driver uses this function to fetch next buffered 1526 * frame. In most cases, this is used when generating beacon frame. This 1527 * function returns a pointer to the next buffered skb or NULL if no more 1528 * buffered frames are available. 1529 * 1530 * Note: buffered frames are returned only after DTIM beacon frame was 1531 * generated with ieee80211_beacon_get() and the low-level driver must thus 1532 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1533 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1534 * does not need to check for DTIM beacons separately and should be able to 1535 * use common code for all beacons. 1536 */ 1537struct sk_buff * 1538ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1539 struct ieee80211_tx_control *control); 1540 1541/** 1542 * ieee80211_get_hdrlen_from_skb - get header length from data 1543 * 1544 * Given an skb with a raw 802.11 header at the data pointer this function 1545 * returns the 802.11 header length in bytes (not including encryption 1546 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1547 * header the function returns 0. 1548 * 1549 * @skb: the frame 1550 */ 1551int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1552 1553/** 1554 * ieee80211_get_hdrlen - get header length from frame control 1555 * 1556 * This function returns the 802.11 header length in bytes (not including 1557 * encryption headers.) 1558 * 1559 * @fc: the frame control field (in CPU endianness) 1560 */ 1561int ieee80211_get_hdrlen(u16 fc); 1562 1563/** 1564 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1565 * 1566 * This function computes a TKIP rc4 key for an skb. It computes 1567 * a phase 1 key if needed (iv16 wraps around). This function is to 1568 * be used by drivers which can do HW encryption but need to compute 1569 * to phase 1/2 key in SW. 1570 * 1571 * @keyconf: the parameter passed with the set key 1572 * @skb: the skb for which the key is needed 1573 * @rc4key: a buffer to which the key will be written 1574 */ 1575void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1576 struct sk_buff *skb, 1577 enum ieee80211_tkip_key_type type, u8 *key); 1578/** 1579 * ieee80211_wake_queue - wake specific queue 1580 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1581 * @queue: queue number (counted from zero). 1582 * 1583 * Drivers should use this function instead of netif_wake_queue. 1584 */ 1585void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1586 1587/** 1588 * ieee80211_stop_queue - stop specific queue 1589 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1590 * @queue: queue number (counted from zero). 1591 * 1592 * Drivers should use this function instead of netif_stop_queue. 1593 */ 1594void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1595 1596/** 1597 * ieee80211_stop_queues - stop all queues 1598 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1599 * 1600 * Drivers should use this function instead of netif_stop_queue. 1601 */ 1602void ieee80211_stop_queues(struct ieee80211_hw *hw); 1603 1604/** 1605 * ieee80211_wake_queues - wake all queues 1606 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1607 * 1608 * Drivers should use this function instead of netif_wake_queue. 1609 */ 1610void ieee80211_wake_queues(struct ieee80211_hw *hw); 1611 1612/** 1613 * ieee80211_scan_completed - completed hardware scan 1614 * 1615 * When hardware scan offload is used (i.e. the hw_scan() callback is 1616 * assigned) this function needs to be called by the driver to notify 1617 * mac80211 that the scan finished. 1618 * 1619 * @hw: the hardware that finished the scan 1620 */ 1621void ieee80211_scan_completed(struct ieee80211_hw *hw); 1622 1623/** 1624 * ieee80211_iterate_active_interfaces - iterate active interfaces 1625 * 1626 * This function iterates over the interfaces associated with a given 1627 * hardware that are currently active and calls the callback for them. 1628 * 1629 * @hw: the hardware struct of which the interfaces should be iterated over 1630 * @iterator: the iterator function to call, cannot sleep 1631 * @data: first argument of the iterator function 1632 */ 1633void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1634 void (*iterator)(void *data, u8 *mac, 1635 struct ieee80211_vif *vif), 1636 void *data); 1637 1638/** 1639 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 1640 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1641 * @ra: receiver address of the BA session recipient 1642 * @tid: the TID to BA on. 1643 * @return: success if addBA request was sent, failure otherwise 1644 * 1645 * Although mac80211/low level driver/user space application can estimate 1646 * the need to start aggregation on a certain RA/TID, the session level 1647 * will be managed by the mac80211. 1648 */ 1649int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1650 1651/** 1652 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1653 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1654 * @ra: receiver address of the BA session recipient. 1655 * @tid: the TID to BA on. 1656 * 1657 * This function must be called by low level driver once it has 1658 * finished with preparations for the BA session. 1659 */ 1660void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1661 1662/** 1663 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1664 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1665 * @ra: receiver address of the BA session recipient. 1666 * @tid: the TID to BA on. 1667 * 1668 * This function must be called by low level driver once it has 1669 * finished with preparations for the BA session. 1670 * This version of the function is irq safe. 1671 */ 1672void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1673 u16 tid); 1674 1675/** 1676 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1677 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1678 * @ra: receiver address of the BA session recipient 1679 * @tid: the TID to stop BA. 1680 * @initiator: if indicates initiator DELBA frame will be sent. 1681 * @return: error if no sta with matching da found, success otherwise 1682 * 1683 * Although mac80211/low level driver/user space application can estimate 1684 * the need to stop aggregation on a certain RA/TID, the session level 1685 * will be managed by the mac80211. 1686 */ 1687int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1688 u8 *ra, u16 tid, 1689 enum ieee80211_back_parties initiator); 1690 1691/** 1692 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1693 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1694 * @ra: receiver address of the BA session recipient. 1695 * @tid: the desired TID to BA on. 1696 * 1697 * This function must be called by low level driver once it has 1698 * finished with preparations for the BA session tear down. 1699 */ 1700void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1701 1702/** 1703 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1704 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1705 * @ra: receiver address of the BA session recipient. 1706 * @tid: the desired TID to BA on. 1707 * 1708 * This function must be called by low level driver once it has 1709 * finished with preparations for the BA session tear down. 1710 * This version of the function is irq safe. 1711 */ 1712void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1713 u16 tid); 1714 1715/** 1716 * ieee80211_notify_mac - low level driver notification 1717 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1718 * @notification_types: enum ieee80211_notification_types 1719 * 1720 * This function must be called by low level driver to inform mac80211 of 1721 * low level driver status change or force mac80211 to re-assoc for low 1722 * level driver internal error that require re-assoc. 1723 */ 1724void ieee80211_notify_mac(struct ieee80211_hw *hw, 1725 enum ieee80211_notification_types notif_type); 1726#endif /* MAC80211_H */ 1727