mac80211.h revision 6693be7124cb8e4f15f0d80ed6e3e50678771737
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_flags - flags to transmission information/status 205 * 206 * These flags are used with the @flags member of &ieee80211_tx_info 207 * 208 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. 209 * @IEEE80211_TX_CTL_DO_NOT_ENCRYPT: send this frame without encryption; 210 * e.g., for EAPOL frame 211 * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame 212 * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 213 * for combined 802.11g / 802.11b networks) 214 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 215 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE 216 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 217 * station 218 * @IEEE80211_TX_CTL_REQUEUE: 219 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 220 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the 221 * through set_retry_limit configured long retry value 222 * @IEEE80211_TX_CTL_EAPOL_FRAME: internal to mac80211 223 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 224 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 225 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 226 * of streams when this flag is on can be extracted from antenna_sel_tx, 227 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n 228 * antennas marked use MIMO_n. 229 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame 230 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 231 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 232 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval 233 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 234 * because the destination STA was in powersave mode. 235 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 236 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 237 * is for the whole aggregation. 238 */ 239enum mac80211_tx_control_flags { 240 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 241 IEEE80211_TX_CTL_DO_NOT_ENCRYPT = BIT(1), 242 IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2), 243 IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3), 244 IEEE80211_TX_CTL_NO_ACK = BIT(4), 245 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5), 246 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6), 247 IEEE80211_TX_CTL_REQUEUE = BIT(7), 248 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8), 249 IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9), 250 IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10), 251 IEEE80211_TX_CTL_EAPOL_FRAME = BIT(11), 252 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12), 253 IEEE80211_TX_CTL_AMPDU = BIT(13), 254 IEEE80211_TX_CTL_OFDM_HT = BIT(14), 255 IEEE80211_TX_CTL_GREEN_FIELD = BIT(15), 256 IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16), 257 IEEE80211_TX_CTL_DUP_DATA = BIT(17), 258 IEEE80211_TX_CTL_SHORT_GI = BIT(18), 259 IEEE80211_TX_CTL_INJECTED = BIT(19), 260 IEEE80211_TX_STAT_TX_FILTERED = BIT(20), 261 IEEE80211_TX_STAT_ACK = BIT(21), 262 IEEE80211_TX_STAT_AMPDU = BIT(22), 263}; 264 265 266#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \ 267 (sizeof(((struct sk_buff *)0)->cb) - 8) 268#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \ 269 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)) 270 271/** 272 * struct ieee80211_tx_info - skb transmit information 273 * 274 * This structure is placed in skb->cb for three uses: 275 * (1) mac80211 TX control - mac80211 tells the driver what to do 276 * (2) driver internal use (if applicable) 277 * (3) TX status information - driver tells mac80211 what happened 278 * 279 * @flags: transmit info flags, defined above 280 * @retry_count: number of retries 281 * @excessive_retries: set to 1 if the frame was retried many times 282 * but not acknowledged 283 * @ampdu_ack_len: number of aggregated frames. 284 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 285 * @ampdu_ack_map: block ack bit map for the aggregation. 286 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 287 * @ack_signal: signal strength of the ACK frame 288 */ 289struct ieee80211_tx_info { 290 /* common information */ 291 u32 flags; 292 u8 band; 293 s8 tx_rate_idx; 294 u8 antenna_sel_tx; 295 296 /* 1 byte hole */ 297 298 union { 299 struct { 300 struct ieee80211_vif *vif; 301 struct ieee80211_key_conf *hw_key; 302 unsigned long jiffies; 303 int ifindex; 304 u16 aid; 305 s8 rts_cts_rate_idx, alt_retry_rate_idx; 306 u8 retry_limit; 307 u8 icv_len; 308 u8 iv_len; 309 } control; 310 struct { 311 u64 ampdu_ack_map; 312 int ack_signal; 313 u8 retry_count; 314 bool excessive_retries; 315 u8 ampdu_ack_len; 316 } status; 317 void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS]; 318 }; 319}; 320 321static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 322{ 323 return (struct ieee80211_tx_info *)skb->cb; 324} 325 326 327/** 328 * enum mac80211_rx_flags - receive flags 329 * 330 * These flags are used with the @flag member of &struct ieee80211_rx_status. 331 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 332 * Use together with %RX_FLAG_MMIC_STRIPPED. 333 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 334 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 335 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 336 * verification has been done by the hardware. 337 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 338 * If this flag is set, the stack cannot do any replay detection 339 * hence the driver or hardware will have to do that. 340 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 341 * the frame. 342 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 343 * the frame. 344 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 345 * is valid. This is useful in monitor mode and necessary for beacon frames 346 * to enable IBSS merging. 347 */ 348enum mac80211_rx_flags { 349 RX_FLAG_MMIC_ERROR = 1<<0, 350 RX_FLAG_DECRYPTED = 1<<1, 351 RX_FLAG_RADIOTAP = 1<<2, 352 RX_FLAG_MMIC_STRIPPED = 1<<3, 353 RX_FLAG_IV_STRIPPED = 1<<4, 354 RX_FLAG_FAILED_FCS_CRC = 1<<5, 355 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 356 RX_FLAG_TSFT = 1<<7, 357}; 358 359/** 360 * struct ieee80211_rx_status - receive status 361 * 362 * The low-level driver should provide this information (the subset 363 * supported by hardware) to the 802.11 code with each received 364 * frame. 365 * 366 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 367 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 368 * @band: the active band when this frame was received 369 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 370 * @signal: signal strength when receiving this frame, either in dBm, in dB or 371 * unspecified depending on the hardware capabilities flags 372 * @IEEE80211_HW_SIGNAL_* 373 * @noise: noise when receiving this frame, in dBm. 374 * @qual: overall signal quality indication, in percent (0-100). 375 * @antenna: antenna used 376 * @rate_idx: index of data rate into band's supported rates 377 * @flag: %RX_FLAG_* 378 */ 379struct ieee80211_rx_status { 380 u64 mactime; 381 enum ieee80211_band band; 382 int freq; 383 int signal; 384 int noise; 385 int qual; 386 int antenna; 387 int rate_idx; 388 int flag; 389}; 390 391/** 392 * enum ieee80211_conf_flags - configuration flags 393 * 394 * Flags to define PHY configuration options 395 * 396 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 397 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 398 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 399 */ 400enum ieee80211_conf_flags { 401 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 402 IEEE80211_CONF_RADIOTAP = (1<<1), 403 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 404}; 405 406/** 407 * struct ieee80211_conf - configuration of the device 408 * 409 * This struct indicates how the driver shall configure the hardware. 410 * 411 * @radio_enabled: when zero, driver is required to switch off the radio. 412 * TODO make a flag 413 * @beacon_int: beacon interval (TODO make interface config) 414 * @flags: configuration flags defined above 415 * @power_level: requested transmit power (in dBm) 416 * @max_antenna_gain: maximum antenna gain (in dBi) 417 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 418 * 1/2: antenna 0/1 419 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 420 * @ht_conf: describes current self configuration of 802.11n HT capabilies 421 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 422 * @channel: the channel to tune to 423 */ 424struct ieee80211_conf { 425 int radio_enabled; 426 427 int beacon_int; 428 u32 flags; 429 int power_level; 430 int max_antenna_gain; 431 u8 antenna_sel_tx; 432 u8 antenna_sel_rx; 433 434 struct ieee80211_channel *channel; 435 436 struct ieee80211_ht_info ht_conf; 437 struct ieee80211_ht_bss_info ht_bss_conf; 438}; 439 440/** 441 * enum ieee80211_if_types - types of 802.11 network interfaces 442 * 443 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 444 * by mac80211 itself 445 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 446 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 447 * daemon. Drivers should never see this type. 448 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 449 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 450 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 451 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 452 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 453 * will never see this type. 454 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 455 */ 456enum ieee80211_if_types { 457 IEEE80211_IF_TYPE_INVALID, 458 IEEE80211_IF_TYPE_AP, 459 IEEE80211_IF_TYPE_STA, 460 IEEE80211_IF_TYPE_IBSS, 461 IEEE80211_IF_TYPE_MESH_POINT, 462 IEEE80211_IF_TYPE_MNTR, 463 IEEE80211_IF_TYPE_WDS, 464 IEEE80211_IF_TYPE_VLAN, 465}; 466 467/** 468 * struct ieee80211_vif - per-interface data 469 * 470 * Data in this structure is continually present for driver 471 * use during the life of a virtual interface. 472 * 473 * @type: type of this virtual interface 474 * @drv_priv: data area for driver use, will always be aligned to 475 * sizeof(void *). 476 */ 477struct ieee80211_vif { 478 enum ieee80211_if_types type; 479 /* must be last */ 480 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 481}; 482 483static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 484{ 485#ifdef CONFIG_MAC80211_MESH 486 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 487#endif 488 return false; 489} 490 491/** 492 * struct ieee80211_if_init_conf - initial configuration of an interface 493 * 494 * @vif: pointer to a driver-use per-interface structure. The pointer 495 * itself is also used for various functions including 496 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 497 * @type: one of &enum ieee80211_if_types constants. Determines the type of 498 * added/removed interface. 499 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 500 * until the interface is removed (i.e. it cannot be used after 501 * remove_interface() callback was called for this interface). 502 * 503 * This structure is used in add_interface() and remove_interface() 504 * callbacks of &struct ieee80211_hw. 505 * 506 * When you allow multiple interfaces to be added to your PHY, take care 507 * that the hardware can actually handle multiple MAC addresses. However, 508 * also take care that when there's no interface left with mac_addr != %NULL 509 * you remove the MAC address from the device to avoid acknowledging packets 510 * in pure monitor mode. 511 */ 512struct ieee80211_if_init_conf { 513 enum ieee80211_if_types type; 514 struct ieee80211_vif *vif; 515 void *mac_addr; 516}; 517 518/** 519 * struct ieee80211_if_conf - configuration of an interface 520 * 521 * @type: type of the interface. This is always the same as was specified in 522 * &struct ieee80211_if_init_conf. The type of an interface never changes 523 * during the life of the interface; this field is present only for 524 * convenience. 525 * @bssid: BSSID of the network we are associated to/creating. 526 * @ssid: used (together with @ssid_len) by drivers for hardware that 527 * generate beacons independently. The pointer is valid only during the 528 * config_interface() call, so copy the value somewhere if you need 529 * it. 530 * @ssid_len: length of the @ssid field. 531 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 532 * &struct ieee80211_hw is set. The driver is responsible of freeing 533 * the sk_buff. 534 * @beacon_control: tx_control for the beacon template, this field is only 535 * valid when the @beacon field was set. 536 * 537 * This structure is passed to the config_interface() callback of 538 * &struct ieee80211_hw. 539 */ 540struct ieee80211_if_conf { 541 int type; 542 u8 *bssid; 543 u8 *ssid; 544 size_t ssid_len; 545 struct sk_buff *beacon; 546}; 547 548/** 549 * enum ieee80211_key_alg - key algorithm 550 * @ALG_WEP: WEP40 or WEP104 551 * @ALG_TKIP: TKIP 552 * @ALG_CCMP: CCMP (AES) 553 */ 554enum ieee80211_key_alg { 555 ALG_WEP, 556 ALG_TKIP, 557 ALG_CCMP, 558}; 559 560 561/** 562 * enum ieee80211_key_flags - key flags 563 * 564 * These flags are used for communication about keys between the driver 565 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 566 * 567 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 568 * that the STA this key will be used with could be using QoS. 569 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 570 * driver to indicate that it requires IV generation for this 571 * particular key. 572 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 573 * the driver for a TKIP key if it requires Michael MIC 574 * generation in software. 575 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 576 * that the key is pairwise rather then a shared key. 577 */ 578enum ieee80211_key_flags { 579 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 580 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 581 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 582 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 583}; 584 585/** 586 * struct ieee80211_key_conf - key information 587 * 588 * This key information is given by mac80211 to the driver by 589 * the set_key() callback in &struct ieee80211_ops. 590 * 591 * @hw_key_idx: To be set by the driver, this is the key index the driver 592 * wants to be given when a frame is transmitted and needs to be 593 * encrypted in hardware. 594 * @alg: The key algorithm. 595 * @flags: key flags, see &enum ieee80211_key_flags. 596 * @keyidx: the key index (0-3) 597 * @keylen: key material length 598 * @key: key material 599 */ 600struct ieee80211_key_conf { 601 enum ieee80211_key_alg alg; 602 u8 hw_key_idx; 603 u8 flags; 604 s8 keyidx; 605 u8 keylen; 606 u8 key[0]; 607}; 608 609/** 610 * enum set_key_cmd - key command 611 * 612 * Used with the set_key() callback in &struct ieee80211_ops, this 613 * indicates whether a key is being removed or added. 614 * 615 * @SET_KEY: a key is set 616 * @DISABLE_KEY: a key must be disabled 617 */ 618enum set_key_cmd { 619 SET_KEY, DISABLE_KEY, 620}; 621 622/** 623 * enum sta_notify_cmd - sta notify command 624 * 625 * Used with the sta_notify() callback in &struct ieee80211_ops, this 626 * indicates addition and removal of a station to station table 627 * 628 * @STA_NOTIFY_ADD: a station was added to the station table 629 * @STA_NOTIFY_REMOVE: a station being removed from the station table 630 */ 631enum sta_notify_cmd { 632 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 633}; 634 635/** 636 * enum ieee80211_tkip_key_type - get tkip key 637 * 638 * Used by drivers which need to get a tkip key for skb. Some drivers need a 639 * phase 1 key, others need a phase 2 key. A single function allows the driver 640 * to get the key, this enum indicates what type of key is required. 641 * 642 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 643 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 644 */ 645enum ieee80211_tkip_key_type { 646 IEEE80211_TKIP_P1_KEY, 647 IEEE80211_TKIP_P2_KEY, 648}; 649 650/** 651 * enum ieee80211_hw_flags - hardware flags 652 * 653 * These flags are used to indicate hardware capabilities to 654 * the stack. Generally, flags here should have their meaning 655 * done in a way that the simplest hardware doesn't need setting 656 * any particular flags. There are some exceptions to this rule, 657 * however, so you are advised to review these flags carefully. 658 * 659 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE: 660 * The device only needs to be supplied with a beacon template. 661 * If you need the host to generate each beacon then don't use 662 * this flag and call ieee80211_beacon_get() when you need the 663 * next beacon frame. Note that if you set this flag, you must 664 * implement the set_tim() callback for powersave mode to work 665 * properly. 666 * This flag is only relevant for access-point mode. 667 * 668 * @IEEE80211_HW_RX_INCLUDES_FCS: 669 * Indicates that received frames passed to the stack include 670 * the FCS at the end. 671 * 672 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 673 * Some wireless LAN chipsets buffer broadcast/multicast frames 674 * for power saving stations in the hardware/firmware and others 675 * rely on the host system for such buffering. This option is used 676 * to configure the IEEE 802.11 upper layer to buffer broadcast and 677 * multicast frames when there are power saving stations so that 678 * the driver can fetch them with ieee80211_get_buffered_bc(). Note 679 * that not setting this flag works properly only when the 680 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because 681 * otherwise the stack will not know when the DTIM beacon was sent. 682 * 683 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 684 * Hardware is not capable of short slot operation on the 2.4 GHz band. 685 * 686 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 687 * Hardware is not capable of receiving frames with short preamble on 688 * the 2.4 GHz band. 689 * 690 * @IEEE80211_HW_SIGNAL_UNSPEC: 691 * Hardware can provide signal values but we don't know its units. We 692 * expect values between 0 and @max_signal. 693 * If possible please provide dB or dBm instead. 694 * 695 * @IEEE80211_HW_SIGNAL_DB: 696 * Hardware gives signal values in dB, decibel difference from an 697 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 698 * If possible please provide dBm instead. 699 * 700 * @IEEE80211_HW_SIGNAL_DBM: 701 * Hardware gives signal values in dBm, decibel difference from 702 * one milliwatt. This is the preferred method since it is standardized 703 * between different devices. @max_signal does not need to be set. 704 * 705 * @IEEE80211_HW_NOISE_DBM: 706 * Hardware can provide noise (radio interference) values in units dBm, 707 * decibel difference from one milliwatt. 708 */ 709enum ieee80211_hw_flags { 710 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 711 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 712 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 713 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 714 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 715 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 716 IEEE80211_HW_SIGNAL_DB = 1<<6, 717 IEEE80211_HW_SIGNAL_DBM = 1<<7, 718 IEEE80211_HW_NOISE_DBM = 1<<8, 719}; 720 721/** 722 * struct ieee80211_hw - hardware information and state 723 * 724 * This structure contains the configuration and hardware 725 * information for an 802.11 PHY. 726 * 727 * @wiphy: This points to the &struct wiphy allocated for this 728 * 802.11 PHY. You must fill in the @perm_addr and @dev 729 * members of this structure using SET_IEEE80211_DEV() 730 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 731 * bands (with channels, bitrates) are registered here. 732 * 733 * @conf: &struct ieee80211_conf, device configuration, don't use. 734 * 735 * @workqueue: single threaded workqueue available for driver use, 736 * allocated by mac80211 on registration and flushed on 737 * unregistration. 738 * 739 * @priv: pointer to private area that was allocated for driver use 740 * along with this structure. 741 * 742 * @flags: hardware flags, see &enum ieee80211_hw_flags. 743 * 744 * @extra_tx_headroom: headroom to reserve in each transmit skb 745 * for use by the driver (e.g. for transmit headers.) 746 * 747 * @channel_change_time: time (in microseconds) it takes to change channels. 748 * 749 * @max_signal: Maximum value for signal (rssi) in RX information, used 750 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 751 * 752 * @queues: number of available hardware transmit queues for 753 * data packets. WMM/QoS requires at least four, these 754 * queues need to have configurable access parameters. 755 * 756 * @ampdu_queues: number of available hardware transmit queues 757 * for A-MPDU packets, these have no access parameters 758 * because they're used only for A-MPDU frames. Note that 759 * mac80211 will not currently use any of the regular queues 760 * for aggregation. 761 * 762 * @rate_control_algorithm: rate control algorithm for this hardware. 763 * If unset (NULL), the default algorithm will be used. Must be 764 * set before calling ieee80211_register_hw(). 765 * 766 * @vif_data_size: size (in bytes) of the drv_priv data area 767 * within &struct ieee80211_vif. 768 */ 769struct ieee80211_hw { 770 struct ieee80211_conf conf; 771 struct wiphy *wiphy; 772 struct workqueue_struct *workqueue; 773 const char *rate_control_algorithm; 774 void *priv; 775 u32 flags; 776 unsigned int extra_tx_headroom; 777 int channel_change_time; 778 int vif_data_size; 779 u16 queues, ampdu_queues; 780 s8 max_signal; 781}; 782 783/** 784 * SET_IEEE80211_DEV - set device for 802.11 hardware 785 * 786 * @hw: the &struct ieee80211_hw to set the device for 787 * @dev: the &struct device of this 802.11 device 788 */ 789static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 790{ 791 set_wiphy_dev(hw->wiphy, dev); 792} 793 794/** 795 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 796 * 797 * @hw: the &struct ieee80211_hw to set the MAC address for 798 * @addr: the address to set 799 */ 800static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 801{ 802 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 803} 804 805static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw) 806{ 807#ifdef CONFIG_MAC80211_QOS 808 return hw->queues; 809#else 810 return 1; 811#endif 812} 813 814static inline int ieee80211_num_queues(struct ieee80211_hw *hw) 815{ 816#ifdef CONFIG_MAC80211_QOS 817 return hw->queues + hw->ampdu_queues; 818#else 819 return 1; 820#endif 821} 822 823static inline struct ieee80211_rate * 824ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 825 const struct ieee80211_tx_info *c) 826{ 827 if (WARN_ON(c->tx_rate_idx < 0)) 828 return NULL; 829 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 830} 831 832static inline struct ieee80211_rate * 833ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 834 const struct ieee80211_tx_info *c) 835{ 836 if (c->control.rts_cts_rate_idx < 0) 837 return NULL; 838 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 839} 840 841static inline struct ieee80211_rate * 842ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 843 const struct ieee80211_tx_info *c) 844{ 845 if (c->control.alt_retry_rate_idx < 0) 846 return NULL; 847 return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx]; 848} 849 850/** 851 * DOC: Hardware crypto acceleration 852 * 853 * mac80211 is capable of taking advantage of many hardware 854 * acceleration designs for encryption and decryption operations. 855 * 856 * The set_key() callback in the &struct ieee80211_ops for a given 857 * device is called to enable hardware acceleration of encryption and 858 * decryption. The callback takes an @address parameter that will be 859 * the broadcast address for default keys, the other station's hardware 860 * address for individual keys or the zero address for keys that will 861 * be used only for transmission. 862 * Multiple transmission keys with the same key index may be used when 863 * VLANs are configured for an access point. 864 * 865 * The @local_address parameter will always be set to our own address, 866 * this is only relevant if you support multiple local addresses. 867 * 868 * When transmitting, the TX control data will use the @hw_key_idx 869 * selected by the driver by modifying the &struct ieee80211_key_conf 870 * pointed to by the @key parameter to the set_key() function. 871 * 872 * The set_key() call for the %SET_KEY command should return 0 if 873 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 874 * added; if you return 0 then hw_key_idx must be assigned to the 875 * hardware key index, you are free to use the full u8 range. 876 * 877 * When the cmd is %DISABLE_KEY then it must succeed. 878 * 879 * Note that it is permissible to not decrypt a frame even if a key 880 * for it has been uploaded to hardware, the stack will not make any 881 * decision based on whether a key has been uploaded or not but rather 882 * based on the receive flags. 883 * 884 * The &struct ieee80211_key_conf structure pointed to by the @key 885 * parameter is guaranteed to be valid until another call to set_key() 886 * removes it, but it can only be used as a cookie to differentiate 887 * keys. 888 * 889 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 890 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 891 * handler. 892 * The update_tkip_key() call updates the driver with the new phase 1 key. 893 * This happens everytime the iv16 wraps around (every 65536 packets). The 894 * set_key() call will happen only once for each key (unless the AP did 895 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 896 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 897 * handler is software decryption with wrap around of iv16. 898 */ 899 900/** 901 * DOC: Frame filtering 902 * 903 * mac80211 requires to see many management frames for proper 904 * operation, and users may want to see many more frames when 905 * in monitor mode. However, for best CPU usage and power consumption, 906 * having as few frames as possible percolate through the stack is 907 * desirable. Hence, the hardware should filter as much as possible. 908 * 909 * To achieve this, mac80211 uses filter flags (see below) to tell 910 * the driver's configure_filter() function which frames should be 911 * passed to mac80211 and which should be filtered out. 912 * 913 * The configure_filter() callback is invoked with the parameters 914 * @mc_count and @mc_list for the combined multicast address list 915 * of all virtual interfaces, @changed_flags telling which flags 916 * were changed and @total_flags with the new flag states. 917 * 918 * If your device has no multicast address filters your driver will 919 * need to check both the %FIF_ALLMULTI flag and the @mc_count 920 * parameter to see whether multicast frames should be accepted 921 * or dropped. 922 * 923 * All unsupported flags in @total_flags must be cleared. 924 * Hardware does not support a flag if it is incapable of _passing_ 925 * the frame to the stack. Otherwise the driver must ignore 926 * the flag, but not clear it. 927 * You must _only_ clear the flag (announce no support for the 928 * flag to mac80211) if you are not able to pass the packet type 929 * to the stack (so the hardware always filters it). 930 * So for example, you should clear @FIF_CONTROL, if your hardware 931 * always filters control frames. If your hardware always passes 932 * control frames to the kernel and is incapable of filtering them, 933 * you do _not_ clear the @FIF_CONTROL flag. 934 * This rule applies to all other FIF flags as well. 935 */ 936 937/** 938 * enum ieee80211_filter_flags - hardware filter flags 939 * 940 * These flags determine what the filter in hardware should be 941 * programmed to let through and what should not be passed to the 942 * stack. It is always safe to pass more frames than requested, 943 * but this has negative impact on power consumption. 944 * 945 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 946 * think of the BSS as your network segment and then this corresponds 947 * to the regular ethernet device promiscuous mode. 948 * 949 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 950 * by the user or if the hardware is not capable of filtering by 951 * multicast address. 952 * 953 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 954 * %RX_FLAG_FAILED_FCS_CRC for them) 955 * 956 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 957 * the %RX_FLAG_FAILED_PLCP_CRC for them 958 * 959 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 960 * to the hardware that it should not filter beacons or probe responses 961 * by BSSID. Filtering them can greatly reduce the amount of processing 962 * mac80211 needs to do and the amount of CPU wakeups, so you should 963 * honour this flag if possible. 964 * 965 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 966 * only those addressed to this station 967 * 968 * @FIF_OTHER_BSS: pass frames destined to other BSSes 969 */ 970enum ieee80211_filter_flags { 971 FIF_PROMISC_IN_BSS = 1<<0, 972 FIF_ALLMULTI = 1<<1, 973 FIF_FCSFAIL = 1<<2, 974 FIF_PLCPFAIL = 1<<3, 975 FIF_BCN_PRBRESP_PROMISC = 1<<4, 976 FIF_CONTROL = 1<<5, 977 FIF_OTHER_BSS = 1<<6, 978}; 979 980/** 981 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 982 * 983 * These flags are used with the ampdu_action() callback in 984 * &struct ieee80211_ops to indicate which action is needed. 985 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 986 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 987 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 988 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 989 */ 990enum ieee80211_ampdu_mlme_action { 991 IEEE80211_AMPDU_RX_START, 992 IEEE80211_AMPDU_RX_STOP, 993 IEEE80211_AMPDU_TX_START, 994 IEEE80211_AMPDU_TX_STOP, 995}; 996 997/** 998 * struct ieee80211_ops - callbacks from mac80211 to the driver 999 * 1000 * This structure contains various callbacks that the driver may 1001 * handle or, in some cases, must handle, for example to configure 1002 * the hardware to a new channel or to transmit a frame. 1003 * 1004 * @tx: Handler that 802.11 module calls for each transmitted frame. 1005 * skb contains the buffer starting from the IEEE 802.11 header. 1006 * The low-level driver should send the frame out based on 1007 * configuration in the TX control data. This handler should, 1008 * preferably, never fail and stop queues appropriately, more 1009 * importantly, however, it must never fail for A-MPDU-queues. 1010 * Must be implemented and atomic. 1011 * 1012 * @start: Called before the first netdevice attached to the hardware 1013 * is enabled. This should turn on the hardware and must turn on 1014 * frame reception (for possibly enabled monitor interfaces.) 1015 * Returns negative error codes, these may be seen in userspace, 1016 * or zero. 1017 * When the device is started it should not have a MAC address 1018 * to avoid acknowledging frames before a non-monitor device 1019 * is added. 1020 * Must be implemented. 1021 * 1022 * @stop: Called after last netdevice attached to the hardware 1023 * is disabled. This should turn off the hardware (at least 1024 * it must turn off frame reception.) 1025 * May be called right after add_interface if that rejects 1026 * an interface. 1027 * Must be implemented. 1028 * 1029 * @add_interface: Called when a netdevice attached to the hardware is 1030 * enabled. Because it is not called for monitor mode devices, @open 1031 * and @stop must be implemented. 1032 * The driver should perform any initialization it needs before 1033 * the device can be enabled. The initial configuration for the 1034 * interface is given in the conf parameter. 1035 * The callback may refuse to add an interface by returning a 1036 * negative error code (which will be seen in userspace.) 1037 * Must be implemented. 1038 * 1039 * @remove_interface: Notifies a driver that an interface is going down. 1040 * The @stop callback is called after this if it is the last interface 1041 * and no monitor interfaces are present. 1042 * When all interfaces are removed, the MAC address in the hardware 1043 * must be cleared so the device no longer acknowledges packets, 1044 * the mac_addr member of the conf structure is, however, set to the 1045 * MAC address of the device going away. 1046 * Hence, this callback must be implemented. 1047 * 1048 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1049 * function to change hardware configuration, e.g., channel. 1050 * 1051 * @config_interface: Handler for configuration requests related to interfaces 1052 * (e.g. BSSID changes.) 1053 * 1054 * @bss_info_changed: Handler for configuration requests related to BSS 1055 * parameters that may vary during BSS's lifespan, and may affect low 1056 * level driver (e.g. assoc/disassoc status, erp parameters). 1057 * This function should not be used if no BSS has been set, unless 1058 * for association indication. The @changed parameter indicates which 1059 * of the bss parameters has changed when a call is made. 1060 * 1061 * @configure_filter: Configure the device's RX filter. 1062 * See the section "Frame filtering" for more information. 1063 * This callback must be implemented and atomic. 1064 * 1065 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon 1066 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set) 1067 * mac80211 calls this function when a TIM bit must be set or cleared 1068 * for a given AID. Must be atomic. 1069 * 1070 * @set_key: See the section "Hardware crypto acceleration" 1071 * This callback can sleep, and is only called between add_interface 1072 * and remove_interface calls, i.e. while the interface with the 1073 * given local_address is enabled. 1074 * 1075 * @update_tkip_key: See the section "Hardware crypto acceleration" 1076 * This callback will be called in the context of Rx. Called for drivers 1077 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1078 * 1079 * @hw_scan: Ask the hardware to service the scan request, no need to start 1080 * the scan state machine in stack. The scan must honour the channel 1081 * configuration done by the regulatory agent in the wiphy's registered 1082 * bands. 1083 * 1084 * @get_stats: return low-level statistics 1085 * 1086 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1087 * callback should be provided to read the TKIP transmit IVs (both IV32 1088 * and IV16) for the given key from hardware. 1089 * 1090 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1091 * 1092 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1093 * the device does fragmentation by itself; if this method is assigned then 1094 * the stack will not do fragmentation. 1095 * 1096 * @set_retry_limit: Configuration of retry limits (if device needs it) 1097 * 1098 * @sta_notify: Notifies low level driver about addition or removal 1099 * of assocaited station or AP. 1100 * 1101 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1102 * bursting) for a hardware TX queue. Must be atomic. 1103 * 1104 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1105 * to get number of currently queued packets (queue length), maximum queue 1106 * size (limit), and total number of packets sent using each TX queue 1107 * (count). The 'stats' pointer points to an array that has hw->queues + 1108 * hw->ampdu_queues items. 1109 * 1110 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1111 * this is only used for IBSS mode debugging and, as such, is not a 1112 * required function. Must be atomic. 1113 * 1114 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1115 * with other STAs in the IBSS. This is only used in IBSS mode. This 1116 * function is optional if the firmware/hardware takes full care of 1117 * TSF synchronization. 1118 * 1119 * @beacon_update: Setup beacon data for IBSS beacons. Unlike access point, 1120 * IBSS uses a fixed beacon frame which is configured using this 1121 * function. 1122 * If the driver returns success (0) from this callback, it owns 1123 * the skb. That means the driver is responsible to kfree_skb() it. 1124 * The control structure is not dynamically allocated. That means the 1125 * driver does not own the pointer and if it needs it somewhere 1126 * outside of the context of this function, it must copy it 1127 * somewhere else. 1128 * This handler is required only for IBSS mode. 1129 * 1130 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1131 * This is needed only for IBSS mode and the result of this function is 1132 * used to determine whether to reply to Probe Requests. 1133 * 1134 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1135 * 1136 * @ampdu_action: Perform a certain A-MPDU action 1137 * The RA/TID combination determines the destination and TID we want 1138 * the ampdu action to be performed for. The action is defined through 1139 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1140 * is the first frame we expect to perform the action on. notice 1141 * that TX/RX_STOP can pass NULL for this parameter. 1142 */ 1143struct ieee80211_ops { 1144 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1145 int (*start)(struct ieee80211_hw *hw); 1146 void (*stop)(struct ieee80211_hw *hw); 1147 int (*add_interface)(struct ieee80211_hw *hw, 1148 struct ieee80211_if_init_conf *conf); 1149 void (*remove_interface)(struct ieee80211_hw *hw, 1150 struct ieee80211_if_init_conf *conf); 1151 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1152 int (*config_interface)(struct ieee80211_hw *hw, 1153 struct ieee80211_vif *vif, 1154 struct ieee80211_if_conf *conf); 1155 void (*bss_info_changed)(struct ieee80211_hw *hw, 1156 struct ieee80211_vif *vif, 1157 struct ieee80211_bss_conf *info, 1158 u32 changed); 1159 void (*configure_filter)(struct ieee80211_hw *hw, 1160 unsigned int changed_flags, 1161 unsigned int *total_flags, 1162 int mc_count, struct dev_addr_list *mc_list); 1163 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1164 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1165 const u8 *local_address, const u8 *address, 1166 struct ieee80211_key_conf *key); 1167 void (*update_tkip_key)(struct ieee80211_hw *hw, 1168 struct ieee80211_key_conf *conf, const u8 *address, 1169 u32 iv32, u16 *phase1key); 1170 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1171 int (*get_stats)(struct ieee80211_hw *hw, 1172 struct ieee80211_low_level_stats *stats); 1173 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1174 u32 *iv32, u16 *iv16); 1175 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1176 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1177 int (*set_retry_limit)(struct ieee80211_hw *hw, 1178 u32 short_retry, u32 long_retr); 1179 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1180 enum sta_notify_cmd, const u8 *addr); 1181 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1182 const struct ieee80211_tx_queue_params *params); 1183 int (*get_tx_stats)(struct ieee80211_hw *hw, 1184 struct ieee80211_tx_queue_stats *stats); 1185 u64 (*get_tsf)(struct ieee80211_hw *hw); 1186 void (*reset_tsf)(struct ieee80211_hw *hw); 1187 int (*beacon_update)(struct ieee80211_hw *hw, 1188 struct sk_buff *skb); 1189 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1190 int (*ampdu_action)(struct ieee80211_hw *hw, 1191 enum ieee80211_ampdu_mlme_action action, 1192 const u8 *addr, u16 tid, u16 *ssn); 1193}; 1194 1195/** 1196 * ieee80211_alloc_hw - Allocate a new hardware device 1197 * 1198 * This must be called once for each hardware device. The returned pointer 1199 * must be used to refer to this device when calling other functions. 1200 * mac80211 allocates a private data area for the driver pointed to by 1201 * @priv in &struct ieee80211_hw, the size of this area is given as 1202 * @priv_data_len. 1203 * 1204 * @priv_data_len: length of private data 1205 * @ops: callbacks for this device 1206 */ 1207struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1208 const struct ieee80211_ops *ops); 1209 1210/** 1211 * ieee80211_register_hw - Register hardware device 1212 * 1213 * You must call this function before any other functions in 1214 * mac80211. Note that before a hardware can be registered, you 1215 * need to fill the contained wiphy's information. 1216 * 1217 * @hw: the device to register as returned by ieee80211_alloc_hw() 1218 */ 1219int ieee80211_register_hw(struct ieee80211_hw *hw); 1220 1221#ifdef CONFIG_MAC80211_LEDS 1222extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1223extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1224extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1225extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1226#endif 1227/** 1228 * ieee80211_get_tx_led_name - get name of TX LED 1229 * 1230 * mac80211 creates a transmit LED trigger for each wireless hardware 1231 * that can be used to drive LEDs if your driver registers a LED device. 1232 * This function returns the name (or %NULL if not configured for LEDs) 1233 * of the trigger so you can automatically link the LED device. 1234 * 1235 * @hw: the hardware to get the LED trigger name for 1236 */ 1237static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1238{ 1239#ifdef CONFIG_MAC80211_LEDS 1240 return __ieee80211_get_tx_led_name(hw); 1241#else 1242 return NULL; 1243#endif 1244} 1245 1246/** 1247 * ieee80211_get_rx_led_name - get name of RX LED 1248 * 1249 * mac80211 creates a receive LED trigger for each wireless hardware 1250 * that can be used to drive LEDs if your driver registers a LED device. 1251 * This function returns the name (or %NULL if not configured for LEDs) 1252 * of the trigger so you can automatically link the LED device. 1253 * 1254 * @hw: the hardware to get the LED trigger name for 1255 */ 1256static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1257{ 1258#ifdef CONFIG_MAC80211_LEDS 1259 return __ieee80211_get_rx_led_name(hw); 1260#else 1261 return NULL; 1262#endif 1263} 1264 1265/** 1266 * ieee80211_get_assoc_led_name - get name of association LED 1267 * 1268 * mac80211 creates a association LED trigger for each wireless hardware 1269 * that can be used to drive LEDs if your driver registers a LED device. 1270 * This function returns the name (or %NULL if not configured for LEDs) 1271 * of the trigger so you can automatically link the LED device. 1272 * 1273 * @hw: the hardware to get the LED trigger name for 1274 */ 1275static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1276{ 1277#ifdef CONFIG_MAC80211_LEDS 1278 return __ieee80211_get_assoc_led_name(hw); 1279#else 1280 return NULL; 1281#endif 1282} 1283 1284/** 1285 * ieee80211_get_radio_led_name - get name of radio LED 1286 * 1287 * mac80211 creates a radio change LED trigger for each wireless hardware 1288 * that can be used to drive LEDs if your driver registers a LED device. 1289 * This function returns the name (or %NULL if not configured for LEDs) 1290 * of the trigger so you can automatically link the LED device. 1291 * 1292 * @hw: the hardware to get the LED trigger name for 1293 */ 1294static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1295{ 1296#ifdef CONFIG_MAC80211_LEDS 1297 return __ieee80211_get_radio_led_name(hw); 1298#else 1299 return NULL; 1300#endif 1301} 1302 1303/** 1304 * ieee80211_unregister_hw - Unregister a hardware device 1305 * 1306 * This function instructs mac80211 to free allocated resources 1307 * and unregister netdevices from the networking subsystem. 1308 * 1309 * @hw: the hardware to unregister 1310 */ 1311void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1312 1313/** 1314 * ieee80211_free_hw - free hardware descriptor 1315 * 1316 * This function frees everything that was allocated, including the 1317 * private data for the driver. You must call ieee80211_unregister_hw() 1318 * before calling this function 1319 * 1320 * @hw: the hardware to free 1321 */ 1322void ieee80211_free_hw(struct ieee80211_hw *hw); 1323 1324/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1325void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1326 struct ieee80211_rx_status *status); 1327 1328/** 1329 * ieee80211_rx - receive frame 1330 * 1331 * Use this function to hand received frames to mac80211. The receive 1332 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1333 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1334 * 1335 * This function may not be called in IRQ context. Calls to this function 1336 * for a single hardware must be synchronized against each other. Calls 1337 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1338 * single hardware. 1339 * 1340 * @hw: the hardware this frame came in on 1341 * @skb: the buffer to receive, owned by mac80211 after this call 1342 * @status: status of this frame; the status pointer need not be valid 1343 * after this function returns 1344 */ 1345static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1346 struct ieee80211_rx_status *status) 1347{ 1348 __ieee80211_rx(hw, skb, status); 1349} 1350 1351/** 1352 * ieee80211_rx_irqsafe - receive frame 1353 * 1354 * Like ieee80211_rx() but can be called in IRQ context 1355 * (internally defers to a tasklet.) 1356 * 1357 * Calls to this function and ieee80211_rx() may not be mixed for a 1358 * single hardware. 1359 * 1360 * @hw: the hardware this frame came in on 1361 * @skb: the buffer to receive, owned by mac80211 after this call 1362 * @status: status of this frame; the status pointer need not be valid 1363 * after this function returns and is not freed by mac80211, 1364 * it is recommended that it points to a stack area 1365 */ 1366void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1367 struct sk_buff *skb, 1368 struct ieee80211_rx_status *status); 1369 1370/** 1371 * ieee80211_tx_status - transmit status callback 1372 * 1373 * Call this function for all transmitted frames after they have been 1374 * transmitted. It is permissible to not call this function for 1375 * multicast frames but this can affect statistics. 1376 * 1377 * This function may not be called in IRQ context. Calls to this function 1378 * for a single hardware must be synchronized against each other. Calls 1379 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1380 * for a single hardware. 1381 * 1382 * @hw: the hardware the frame was transmitted by 1383 * @skb: the frame that was transmitted, owned by mac80211 after this call 1384 */ 1385void ieee80211_tx_status(struct ieee80211_hw *hw, 1386 struct sk_buff *skb); 1387 1388/** 1389 * ieee80211_tx_status_irqsafe - irq-safe transmit status callback 1390 * 1391 * Like ieee80211_tx_status() but can be called in IRQ context 1392 * (internally defers to a tasklet.) 1393 * 1394 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1395 * single hardware. 1396 * 1397 * @hw: the hardware the frame was transmitted by 1398 * @skb: the frame that was transmitted, owned by mac80211 after this call 1399 */ 1400void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1401 struct sk_buff *skb); 1402 1403/** 1404 * ieee80211_beacon_get - beacon generation function 1405 * @hw: pointer obtained from ieee80211_alloc_hw(). 1406 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1407 * @control: will be filled with information needed to send this beacon. 1408 * 1409 * If the beacon frames are generated by the host system (i.e., not in 1410 * hardware/firmware), the low-level driver uses this function to receive 1411 * the next beacon frame from the 802.11 code. The low-level is responsible 1412 * for calling this function before beacon data is needed (e.g., based on 1413 * hardware interrupt). Returned skb is used only once and low-level driver 1414 * is responsible of freeing it. 1415 */ 1416struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1417 struct ieee80211_vif *vif); 1418 1419/** 1420 * ieee80211_rts_get - RTS frame generation function 1421 * @hw: pointer obtained from ieee80211_alloc_hw(). 1422 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1423 * @frame: pointer to the frame that is going to be protected by the RTS. 1424 * @frame_len: the frame length (in octets). 1425 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1426 * @rts: The buffer where to store the RTS frame. 1427 * 1428 * If the RTS frames are generated by the host system (i.e., not in 1429 * hardware/firmware), the low-level driver uses this function to receive 1430 * the next RTS frame from the 802.11 code. The low-level is responsible 1431 * for calling this function before and RTS frame is needed. 1432 */ 1433void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1434 const void *frame, size_t frame_len, 1435 const struct ieee80211_tx_info *frame_txctl, 1436 struct ieee80211_rts *rts); 1437 1438/** 1439 * ieee80211_rts_duration - Get the duration field for an RTS frame 1440 * @hw: pointer obtained from ieee80211_alloc_hw(). 1441 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1442 * @frame_len: the length of the frame that is going to be protected by the RTS. 1443 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1444 * 1445 * If the RTS is generated in firmware, but the host system must provide 1446 * the duration field, the low-level driver uses this function to receive 1447 * the duration field value in little-endian byteorder. 1448 */ 1449__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1450 struct ieee80211_vif *vif, size_t frame_len, 1451 const struct ieee80211_tx_info *frame_txctl); 1452 1453/** 1454 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1455 * @hw: pointer obtained from ieee80211_alloc_hw(). 1456 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1457 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1458 * @frame_len: the frame length (in octets). 1459 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1460 * @cts: The buffer where to store the CTS-to-self frame. 1461 * 1462 * If the CTS-to-self frames are generated by the host system (i.e., not in 1463 * hardware/firmware), the low-level driver uses this function to receive 1464 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1465 * for calling this function before and CTS-to-self frame is needed. 1466 */ 1467void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1468 struct ieee80211_vif *vif, 1469 const void *frame, size_t frame_len, 1470 const struct ieee80211_tx_info *frame_txctl, 1471 struct ieee80211_cts *cts); 1472 1473/** 1474 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1475 * @hw: pointer obtained from ieee80211_alloc_hw(). 1476 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1477 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1478 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1479 * 1480 * If the CTS-to-self is generated in firmware, but the host system must provide 1481 * the duration field, the low-level driver uses this function to receive 1482 * the duration field value in little-endian byteorder. 1483 */ 1484__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1485 struct ieee80211_vif *vif, 1486 size_t frame_len, 1487 const struct ieee80211_tx_info *frame_txctl); 1488 1489/** 1490 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1491 * @hw: pointer obtained from ieee80211_alloc_hw(). 1492 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1493 * @frame_len: the length of the frame. 1494 * @rate: the rate at which the frame is going to be transmitted. 1495 * 1496 * Calculate the duration field of some generic frame, given its 1497 * length and transmission rate (in 100kbps). 1498 */ 1499__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1500 struct ieee80211_vif *vif, 1501 size_t frame_len, 1502 struct ieee80211_rate *rate); 1503 1504/** 1505 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1506 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1507 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1508 * @control: will be filled with information needed to send returned frame. 1509 * 1510 * Function for accessing buffered broadcast and multicast frames. If 1511 * hardware/firmware does not implement buffering of broadcast/multicast 1512 * frames when power saving is used, 802.11 code buffers them in the host 1513 * memory. The low-level driver uses this function to fetch next buffered 1514 * frame. In most cases, this is used when generating beacon frame. This 1515 * function returns a pointer to the next buffered skb or NULL if no more 1516 * buffered frames are available. 1517 * 1518 * Note: buffered frames are returned only after DTIM beacon frame was 1519 * generated with ieee80211_beacon_get() and the low-level driver must thus 1520 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1521 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1522 * does not need to check for DTIM beacons separately and should be able to 1523 * use common code for all beacons. 1524 */ 1525struct sk_buff * 1526ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 1527 1528/** 1529 * ieee80211_get_hdrlen_from_skb - get header length from data 1530 * 1531 * Given an skb with a raw 802.11 header at the data pointer this function 1532 * returns the 802.11 header length in bytes (not including encryption 1533 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1534 * header the function returns 0. 1535 * 1536 * @skb: the frame 1537 */ 1538unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1539 1540/** 1541 * ieee80211_get_hdrlen - get header length from frame control 1542 * 1543 * This function returns the 802.11 header length in bytes (not including 1544 * encryption headers.) 1545 * 1546 * @fc: the frame control field (in CPU endianness) 1547 */ 1548int ieee80211_get_hdrlen(u16 fc); 1549 1550/** 1551 * ieee80211_hdrlen - get header length in bytes from frame control 1552 * @fc: frame control field in little-endian format 1553 */ 1554unsigned int ieee80211_hdrlen(__le16 fc); 1555 1556/** 1557 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1558 * 1559 * This function computes a TKIP rc4 key for an skb. It computes 1560 * a phase 1 key if needed (iv16 wraps around). This function is to 1561 * be used by drivers which can do HW encryption but need to compute 1562 * to phase 1/2 key in SW. 1563 * 1564 * @keyconf: the parameter passed with the set key 1565 * @skb: the skb for which the key is needed 1566 * @rc4key: a buffer to which the key will be written 1567 */ 1568void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1569 struct sk_buff *skb, 1570 enum ieee80211_tkip_key_type type, u8 *key); 1571/** 1572 * ieee80211_wake_queue - wake specific queue 1573 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1574 * @queue: queue number (counted from zero). 1575 * 1576 * Drivers should use this function instead of netif_wake_queue. 1577 */ 1578void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1579 1580/** 1581 * ieee80211_stop_queue - stop specific queue 1582 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1583 * @queue: queue number (counted from zero). 1584 * 1585 * Drivers should use this function instead of netif_stop_queue. 1586 */ 1587void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1588 1589/** 1590 * ieee80211_stop_queues - stop all queues 1591 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1592 * 1593 * Drivers should use this function instead of netif_stop_queue. 1594 */ 1595void ieee80211_stop_queues(struct ieee80211_hw *hw); 1596 1597/** 1598 * ieee80211_wake_queues - wake all queues 1599 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1600 * 1601 * Drivers should use this function instead of netif_wake_queue. 1602 */ 1603void ieee80211_wake_queues(struct ieee80211_hw *hw); 1604 1605/** 1606 * ieee80211_scan_completed - completed hardware scan 1607 * 1608 * When hardware scan offload is used (i.e. the hw_scan() callback is 1609 * assigned) this function needs to be called by the driver to notify 1610 * mac80211 that the scan finished. 1611 * 1612 * @hw: the hardware that finished the scan 1613 */ 1614void ieee80211_scan_completed(struct ieee80211_hw *hw); 1615 1616/** 1617 * ieee80211_iterate_active_interfaces- iterate active interfaces 1618 * 1619 * This function iterates over the interfaces associated with a given 1620 * hardware that are currently active and calls the callback for them. 1621 * This function allows the iterator function to sleep, when the iterator 1622 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 1623 * be used. 1624 * 1625 * @hw: the hardware struct of which the interfaces should be iterated over 1626 * @iterator: the iterator function to call 1627 * @data: first argument of the iterator function 1628 */ 1629void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1630 void (*iterator)(void *data, u8 *mac, 1631 struct ieee80211_vif *vif), 1632 void *data); 1633 1634/** 1635 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 1636 * 1637 * This function iterates over the interfaces associated with a given 1638 * hardware that are currently active and calls the callback for them. 1639 * This function requires the iterator callback function to be atomic, 1640 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 1641 * 1642 * @hw: the hardware struct of which the interfaces should be iterated over 1643 * @iterator: the iterator function to call, cannot sleep 1644 * @data: first argument of the iterator function 1645 */ 1646void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 1647 void (*iterator)(void *data, 1648 u8 *mac, 1649 struct ieee80211_vif *vif), 1650 void *data); 1651 1652/** 1653 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 1654 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1655 * @ra: receiver address of the BA session recipient 1656 * @tid: the TID to BA on. 1657 * @return: success if addBA request was sent, failure otherwise 1658 * 1659 * Although mac80211/low level driver/user space application can estimate 1660 * the need to start aggregation on a certain RA/TID, the session level 1661 * will be managed by the mac80211. 1662 */ 1663int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1664 1665/** 1666 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1667 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1668 * @ra: receiver address of the BA session recipient. 1669 * @tid: the TID to BA on. 1670 * 1671 * This function must be called by low level driver once it has 1672 * finished with preparations for the BA session. 1673 */ 1674void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1675 1676/** 1677 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1678 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1679 * @ra: receiver address of the BA session recipient. 1680 * @tid: the TID to BA on. 1681 * 1682 * This function must be called by low level driver once it has 1683 * finished with preparations for the BA session. 1684 * This version of the function is irq safe. 1685 */ 1686void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1687 u16 tid); 1688 1689/** 1690 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1691 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1692 * @ra: receiver address of the BA session recipient 1693 * @tid: the TID to stop BA. 1694 * @initiator: if indicates initiator DELBA frame will be sent. 1695 * @return: error if no sta with matching da found, success otherwise 1696 * 1697 * Although mac80211/low level driver/user space application can estimate 1698 * the need to stop aggregation on a certain RA/TID, the session level 1699 * will be managed by the mac80211. 1700 */ 1701int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1702 u8 *ra, u16 tid, 1703 enum ieee80211_back_parties initiator); 1704 1705/** 1706 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1707 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1708 * @ra: receiver address of the BA session recipient. 1709 * @tid: the desired TID to BA on. 1710 * 1711 * This function must be called by low level driver once it has 1712 * finished with preparations for the BA session tear down. 1713 */ 1714void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1715 1716/** 1717 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1718 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1719 * @ra: receiver address of the BA session recipient. 1720 * @tid: the desired TID to BA on. 1721 * 1722 * This function must be called by low level driver once it has 1723 * finished with preparations for the BA session tear down. 1724 * This version of the function is irq safe. 1725 */ 1726void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1727 u16 tid); 1728 1729/** 1730 * ieee80211_notify_mac - low level driver notification 1731 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1732 * @notification_types: enum ieee80211_notification_types 1733 * 1734 * This function must be called by low level driver to inform mac80211 of 1735 * low level driver status change or force mac80211 to re-assoc for low 1736 * level driver internal error that require re-assoc. 1737 */ 1738void ieee80211_notify_mac(struct ieee80211_hw *hw, 1739 enum ieee80211_notification_types notif_type); 1740#endif /* MAC80211_H */ 1741