mac80211.h revision 428da76523e4a9c08bdfadc25a05b520f19b9133
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. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 599 * data block: 600 * - Temporal Encryption Key (128 bits) 601 * - Temporal Authenticator Tx MIC Key (64 bits) 602 * - Temporal Authenticator Rx MIC Key (64 bits) 603 * 604 */ 605struct ieee80211_key_conf { 606 enum ieee80211_key_alg alg; 607 u8 hw_key_idx; 608 u8 flags; 609 s8 keyidx; 610 u8 keylen; 611 u8 key[0]; 612}; 613 614/** 615 * enum set_key_cmd - key command 616 * 617 * Used with the set_key() callback in &struct ieee80211_ops, this 618 * indicates whether a key is being removed or added. 619 * 620 * @SET_KEY: a key is set 621 * @DISABLE_KEY: a key must be disabled 622 */ 623enum set_key_cmd { 624 SET_KEY, DISABLE_KEY, 625}; 626 627/** 628 * enum sta_notify_cmd - sta notify command 629 * 630 * Used with the sta_notify() callback in &struct ieee80211_ops, this 631 * indicates addition and removal of a station to station table 632 * 633 * @STA_NOTIFY_ADD: a station was added to the station table 634 * @STA_NOTIFY_REMOVE: a station being removed from the station table 635 */ 636enum sta_notify_cmd { 637 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 638}; 639 640/** 641 * enum ieee80211_tkip_key_type - get tkip key 642 * 643 * Used by drivers which need to get a tkip key for skb. Some drivers need a 644 * phase 1 key, others need a phase 2 key. A single function allows the driver 645 * to get the key, this enum indicates what type of key is required. 646 * 647 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 648 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 649 */ 650enum ieee80211_tkip_key_type { 651 IEEE80211_TKIP_P1_KEY, 652 IEEE80211_TKIP_P2_KEY, 653}; 654 655/** 656 * enum ieee80211_hw_flags - hardware flags 657 * 658 * These flags are used to indicate hardware capabilities to 659 * the stack. Generally, flags here should have their meaning 660 * done in a way that the simplest hardware doesn't need setting 661 * any particular flags. There are some exceptions to this rule, 662 * however, so you are advised to review these flags carefully. 663 * 664 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE: 665 * The device only needs to be supplied with a beacon template. 666 * If you need the host to generate each beacon then don't use 667 * this flag and call ieee80211_beacon_get() when you need the 668 * next beacon frame. Note that if you set this flag, you must 669 * implement the set_tim() callback for powersave mode to work 670 * properly. 671 * This flag is only relevant for access-point mode. 672 * 673 * @IEEE80211_HW_RX_INCLUDES_FCS: 674 * Indicates that received frames passed to the stack include 675 * the FCS at the end. 676 * 677 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 678 * Some wireless LAN chipsets buffer broadcast/multicast frames 679 * for power saving stations in the hardware/firmware and others 680 * rely on the host system for such buffering. This option is used 681 * to configure the IEEE 802.11 upper layer to buffer broadcast and 682 * multicast frames when there are power saving stations so that 683 * the driver can fetch them with ieee80211_get_buffered_bc(). Note 684 * that not setting this flag works properly only when the 685 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because 686 * otherwise the stack will not know when the DTIM beacon was sent. 687 * 688 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 689 * Hardware is not capable of short slot operation on the 2.4 GHz band. 690 * 691 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 692 * Hardware is not capable of receiving frames with short preamble on 693 * the 2.4 GHz band. 694 * 695 * @IEEE80211_HW_SIGNAL_UNSPEC: 696 * Hardware can provide signal values but we don't know its units. We 697 * expect values between 0 and @max_signal. 698 * If possible please provide dB or dBm instead. 699 * 700 * @IEEE80211_HW_SIGNAL_DB: 701 * Hardware gives signal values in dB, decibel difference from an 702 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 703 * If possible please provide dBm instead. 704 * 705 * @IEEE80211_HW_SIGNAL_DBM: 706 * Hardware gives signal values in dBm, decibel difference from 707 * one milliwatt. This is the preferred method since it is standardized 708 * between different devices. @max_signal does not need to be set. 709 * 710 * @IEEE80211_HW_NOISE_DBM: 711 * Hardware can provide noise (radio interference) values in units dBm, 712 * decibel difference from one milliwatt. 713 */ 714enum ieee80211_hw_flags { 715 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 716 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 717 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 718 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 719 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 720 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 721 IEEE80211_HW_SIGNAL_DB = 1<<6, 722 IEEE80211_HW_SIGNAL_DBM = 1<<7, 723 IEEE80211_HW_NOISE_DBM = 1<<8, 724}; 725 726/** 727 * struct ieee80211_hw - hardware information and state 728 * 729 * This structure contains the configuration and hardware 730 * information for an 802.11 PHY. 731 * 732 * @wiphy: This points to the &struct wiphy allocated for this 733 * 802.11 PHY. You must fill in the @perm_addr and @dev 734 * members of this structure using SET_IEEE80211_DEV() 735 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 736 * bands (with channels, bitrates) are registered here. 737 * 738 * @conf: &struct ieee80211_conf, device configuration, don't use. 739 * 740 * @workqueue: single threaded workqueue available for driver use, 741 * allocated by mac80211 on registration and flushed when an 742 * interface is removed. 743 * NOTICE: All work performed on this workqueue should NEVER 744 * acquire the RTNL lock (i.e. Don't use the function 745 * ieee80211_iterate_active_interfaces()) 746 * 747 * @priv: pointer to private area that was allocated for driver use 748 * along with this structure. 749 * 750 * @flags: hardware flags, see &enum ieee80211_hw_flags. 751 * 752 * @extra_tx_headroom: headroom to reserve in each transmit skb 753 * for use by the driver (e.g. for transmit headers.) 754 * 755 * @channel_change_time: time (in microseconds) it takes to change channels. 756 * 757 * @max_signal: Maximum value for signal (rssi) in RX information, used 758 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 759 * 760 * @queues: number of available hardware transmit queues for 761 * data packets. WMM/QoS requires at least four, these 762 * queues need to have configurable access parameters. 763 * 764 * @ampdu_queues: number of available hardware transmit queues 765 * for A-MPDU packets, these have no access parameters 766 * because they're used only for A-MPDU frames. Note that 767 * mac80211 will not currently use any of the regular queues 768 * for aggregation. 769 * 770 * @rate_control_algorithm: rate control algorithm for this hardware. 771 * If unset (NULL), the default algorithm will be used. Must be 772 * set before calling ieee80211_register_hw(). 773 * 774 * @vif_data_size: size (in bytes) of the drv_priv data area 775 * within &struct ieee80211_vif. 776 */ 777struct ieee80211_hw { 778 struct ieee80211_conf conf; 779 struct wiphy *wiphy; 780 struct workqueue_struct *workqueue; 781 const char *rate_control_algorithm; 782 void *priv; 783 u32 flags; 784 unsigned int extra_tx_headroom; 785 int channel_change_time; 786 int vif_data_size; 787 u16 queues, ampdu_queues; 788 s8 max_signal; 789}; 790 791/** 792 * SET_IEEE80211_DEV - set device for 802.11 hardware 793 * 794 * @hw: the &struct ieee80211_hw to set the device for 795 * @dev: the &struct device of this 802.11 device 796 */ 797static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 798{ 799 set_wiphy_dev(hw->wiphy, dev); 800} 801 802/** 803 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 804 * 805 * @hw: the &struct ieee80211_hw to set the MAC address for 806 * @addr: the address to set 807 */ 808static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 809{ 810 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 811} 812 813static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw) 814{ 815#ifdef CONFIG_MAC80211_QOS 816 return hw->queues; 817#else 818 return 1; 819#endif 820} 821 822static inline int ieee80211_num_queues(struct ieee80211_hw *hw) 823{ 824#ifdef CONFIG_MAC80211_QOS 825 return hw->queues + hw->ampdu_queues; 826#else 827 return 1; 828#endif 829} 830 831static inline struct ieee80211_rate * 832ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 833 const struct ieee80211_tx_info *c) 834{ 835 if (WARN_ON(c->tx_rate_idx < 0)) 836 return NULL; 837 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 838} 839 840static inline struct ieee80211_rate * 841ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 842 const struct ieee80211_tx_info *c) 843{ 844 if (c->control.rts_cts_rate_idx < 0) 845 return NULL; 846 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 847} 848 849static inline struct ieee80211_rate * 850ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 851 const struct ieee80211_tx_info *c) 852{ 853 if (c->control.alt_retry_rate_idx < 0) 854 return NULL; 855 return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx]; 856} 857 858/** 859 * DOC: Hardware crypto acceleration 860 * 861 * mac80211 is capable of taking advantage of many hardware 862 * acceleration designs for encryption and decryption operations. 863 * 864 * The set_key() callback in the &struct ieee80211_ops for a given 865 * device is called to enable hardware acceleration of encryption and 866 * decryption. The callback takes an @address parameter that will be 867 * the broadcast address for default keys, the other station's hardware 868 * address for individual keys or the zero address for keys that will 869 * be used only for transmission. 870 * Multiple transmission keys with the same key index may be used when 871 * VLANs are configured for an access point. 872 * 873 * The @local_address parameter will always be set to our own address, 874 * this is only relevant if you support multiple local addresses. 875 * 876 * When transmitting, the TX control data will use the @hw_key_idx 877 * selected by the driver by modifying the &struct ieee80211_key_conf 878 * pointed to by the @key parameter to the set_key() function. 879 * 880 * The set_key() call for the %SET_KEY command should return 0 if 881 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 882 * added; if you return 0 then hw_key_idx must be assigned to the 883 * hardware key index, you are free to use the full u8 range. 884 * 885 * When the cmd is %DISABLE_KEY then it must succeed. 886 * 887 * Note that it is permissible to not decrypt a frame even if a key 888 * for it has been uploaded to hardware, the stack will not make any 889 * decision based on whether a key has been uploaded or not but rather 890 * based on the receive flags. 891 * 892 * The &struct ieee80211_key_conf structure pointed to by the @key 893 * parameter is guaranteed to be valid until another call to set_key() 894 * removes it, but it can only be used as a cookie to differentiate 895 * keys. 896 * 897 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 898 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 899 * handler. 900 * The update_tkip_key() call updates the driver with the new phase 1 key. 901 * This happens everytime the iv16 wraps around (every 65536 packets). The 902 * set_key() call will happen only once for each key (unless the AP did 903 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 904 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 905 * handler is software decryption with wrap around of iv16. 906 */ 907 908/** 909 * DOC: Frame filtering 910 * 911 * mac80211 requires to see many management frames for proper 912 * operation, and users may want to see many more frames when 913 * in monitor mode. However, for best CPU usage and power consumption, 914 * having as few frames as possible percolate through the stack is 915 * desirable. Hence, the hardware should filter as much as possible. 916 * 917 * To achieve this, mac80211 uses filter flags (see below) to tell 918 * the driver's configure_filter() function which frames should be 919 * passed to mac80211 and which should be filtered out. 920 * 921 * The configure_filter() callback is invoked with the parameters 922 * @mc_count and @mc_list for the combined multicast address list 923 * of all virtual interfaces, @changed_flags telling which flags 924 * were changed and @total_flags with the new flag states. 925 * 926 * If your device has no multicast address filters your driver will 927 * need to check both the %FIF_ALLMULTI flag and the @mc_count 928 * parameter to see whether multicast frames should be accepted 929 * or dropped. 930 * 931 * All unsupported flags in @total_flags must be cleared. 932 * Hardware does not support a flag if it is incapable of _passing_ 933 * the frame to the stack. Otherwise the driver must ignore 934 * the flag, but not clear it. 935 * You must _only_ clear the flag (announce no support for the 936 * flag to mac80211) if you are not able to pass the packet type 937 * to the stack (so the hardware always filters it). 938 * So for example, you should clear @FIF_CONTROL, if your hardware 939 * always filters control frames. If your hardware always passes 940 * control frames to the kernel and is incapable of filtering them, 941 * you do _not_ clear the @FIF_CONTROL flag. 942 * This rule applies to all other FIF flags as well. 943 */ 944 945/** 946 * enum ieee80211_filter_flags - hardware filter flags 947 * 948 * These flags determine what the filter in hardware should be 949 * programmed to let through and what should not be passed to the 950 * stack. It is always safe to pass more frames than requested, 951 * but this has negative impact on power consumption. 952 * 953 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 954 * think of the BSS as your network segment and then this corresponds 955 * to the regular ethernet device promiscuous mode. 956 * 957 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 958 * by the user or if the hardware is not capable of filtering by 959 * multicast address. 960 * 961 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 962 * %RX_FLAG_FAILED_FCS_CRC for them) 963 * 964 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 965 * the %RX_FLAG_FAILED_PLCP_CRC for them 966 * 967 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 968 * to the hardware that it should not filter beacons or probe responses 969 * by BSSID. Filtering them can greatly reduce the amount of processing 970 * mac80211 needs to do and the amount of CPU wakeups, so you should 971 * honour this flag if possible. 972 * 973 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 974 * only those addressed to this station 975 * 976 * @FIF_OTHER_BSS: pass frames destined to other BSSes 977 */ 978enum ieee80211_filter_flags { 979 FIF_PROMISC_IN_BSS = 1<<0, 980 FIF_ALLMULTI = 1<<1, 981 FIF_FCSFAIL = 1<<2, 982 FIF_PLCPFAIL = 1<<3, 983 FIF_BCN_PRBRESP_PROMISC = 1<<4, 984 FIF_CONTROL = 1<<5, 985 FIF_OTHER_BSS = 1<<6, 986}; 987 988/** 989 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 990 * 991 * These flags are used with the ampdu_action() callback in 992 * &struct ieee80211_ops to indicate which action is needed. 993 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 994 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 995 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 996 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 997 */ 998enum ieee80211_ampdu_mlme_action { 999 IEEE80211_AMPDU_RX_START, 1000 IEEE80211_AMPDU_RX_STOP, 1001 IEEE80211_AMPDU_TX_START, 1002 IEEE80211_AMPDU_TX_STOP, 1003}; 1004 1005/** 1006 * struct ieee80211_ops - callbacks from mac80211 to the driver 1007 * 1008 * This structure contains various callbacks that the driver may 1009 * handle or, in some cases, must handle, for example to configure 1010 * the hardware to a new channel or to transmit a frame. 1011 * 1012 * @tx: Handler that 802.11 module calls for each transmitted frame. 1013 * skb contains the buffer starting from the IEEE 802.11 header. 1014 * The low-level driver should send the frame out based on 1015 * configuration in the TX control data. This handler should, 1016 * preferably, never fail and stop queues appropriately, more 1017 * importantly, however, it must never fail for A-MPDU-queues. 1018 * Must be implemented and atomic. 1019 * 1020 * @start: Called before the first netdevice attached to the hardware 1021 * is enabled. This should turn on the hardware and must turn on 1022 * frame reception (for possibly enabled monitor interfaces.) 1023 * Returns negative error codes, these may be seen in userspace, 1024 * or zero. 1025 * When the device is started it should not have a MAC address 1026 * to avoid acknowledging frames before a non-monitor device 1027 * is added. 1028 * Must be implemented. 1029 * 1030 * @stop: Called after last netdevice attached to the hardware 1031 * is disabled. This should turn off the hardware (at least 1032 * it must turn off frame reception.) 1033 * May be called right after add_interface if that rejects 1034 * an interface. 1035 * Must be implemented. 1036 * 1037 * @add_interface: Called when a netdevice attached to the hardware is 1038 * enabled. Because it is not called for monitor mode devices, @open 1039 * and @stop must be implemented. 1040 * The driver should perform any initialization it needs before 1041 * the device can be enabled. The initial configuration for the 1042 * interface is given in the conf parameter. 1043 * The callback may refuse to add an interface by returning a 1044 * negative error code (which will be seen in userspace.) 1045 * Must be implemented. 1046 * 1047 * @remove_interface: Notifies a driver that an interface is going down. 1048 * The @stop callback is called after this if it is the last interface 1049 * and no monitor interfaces are present. 1050 * When all interfaces are removed, the MAC address in the hardware 1051 * must be cleared so the device no longer acknowledges packets, 1052 * the mac_addr member of the conf structure is, however, set to the 1053 * MAC address of the device going away. 1054 * Hence, this callback must be implemented. 1055 * 1056 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1057 * function to change hardware configuration, e.g., channel. 1058 * 1059 * @config_interface: Handler for configuration requests related to interfaces 1060 * (e.g. BSSID changes.) 1061 * 1062 * @bss_info_changed: Handler for configuration requests related to BSS 1063 * parameters that may vary during BSS's lifespan, and may affect low 1064 * level driver (e.g. assoc/disassoc status, erp parameters). 1065 * This function should not be used if no BSS has been set, unless 1066 * for association indication. The @changed parameter indicates which 1067 * of the bss parameters has changed when a call is made. 1068 * 1069 * @configure_filter: Configure the device's RX filter. 1070 * See the section "Frame filtering" for more information. 1071 * This callback must be implemented and atomic. 1072 * 1073 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon 1074 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set) 1075 * mac80211 calls this function when a TIM bit must be set or cleared 1076 * for a given AID. Must be atomic. 1077 * 1078 * @set_key: See the section "Hardware crypto acceleration" 1079 * This callback can sleep, and is only called between add_interface 1080 * and remove_interface calls, i.e. while the interface with the 1081 * given local_address is enabled. 1082 * 1083 * @update_tkip_key: See the section "Hardware crypto acceleration" 1084 * This callback will be called in the context of Rx. Called for drivers 1085 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1086 * 1087 * @hw_scan: Ask the hardware to service the scan request, no need to start 1088 * the scan state machine in stack. The scan must honour the channel 1089 * configuration done by the regulatory agent in the wiphy's registered 1090 * bands. 1091 * 1092 * @get_stats: return low-level statistics 1093 * 1094 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1095 * callback should be provided to read the TKIP transmit IVs (both IV32 1096 * and IV16) for the given key from hardware. 1097 * 1098 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1099 * 1100 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1101 * the device does fragmentation by itself; if this method is assigned then 1102 * the stack will not do fragmentation. 1103 * 1104 * @set_retry_limit: Configuration of retry limits (if device needs it) 1105 * 1106 * @sta_notify: Notifies low level driver about addition or removal 1107 * of assocaited station or AP. 1108 * 1109 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1110 * bursting) for a hardware TX queue. Must be atomic. 1111 * 1112 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1113 * to get number of currently queued packets (queue length), maximum queue 1114 * size (limit), and total number of packets sent using each TX queue 1115 * (count). The 'stats' pointer points to an array that has hw->queues + 1116 * hw->ampdu_queues items. 1117 * 1118 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1119 * this is only used for IBSS mode debugging and, as such, is not a 1120 * required function. Must be atomic. 1121 * 1122 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1123 * with other STAs in the IBSS. This is only used in IBSS mode. This 1124 * function is optional if the firmware/hardware takes full care of 1125 * TSF synchronization. 1126 * 1127 * @beacon_update: Setup beacon data for IBSS beacons. Unlike access point, 1128 * IBSS uses a fixed beacon frame which is configured using this 1129 * function. 1130 * If the driver returns success (0) from this callback, it owns 1131 * the skb. That means the driver is responsible to kfree_skb() it. 1132 * The control structure is not dynamically allocated. That means the 1133 * driver does not own the pointer and if it needs it somewhere 1134 * outside of the context of this function, it must copy it 1135 * somewhere else. 1136 * This handler is required only for IBSS mode. 1137 * 1138 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1139 * This is needed only for IBSS mode and the result of this function is 1140 * used to determine whether to reply to Probe Requests. 1141 * 1142 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1143 * 1144 * @ampdu_action: Perform a certain A-MPDU action 1145 * The RA/TID combination determines the destination and TID we want 1146 * the ampdu action to be performed for. The action is defined through 1147 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1148 * is the first frame we expect to perform the action on. notice 1149 * that TX/RX_STOP can pass NULL for this parameter. 1150 */ 1151struct ieee80211_ops { 1152 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1153 int (*start)(struct ieee80211_hw *hw); 1154 void (*stop)(struct ieee80211_hw *hw); 1155 int (*add_interface)(struct ieee80211_hw *hw, 1156 struct ieee80211_if_init_conf *conf); 1157 void (*remove_interface)(struct ieee80211_hw *hw, 1158 struct ieee80211_if_init_conf *conf); 1159 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1160 int (*config_interface)(struct ieee80211_hw *hw, 1161 struct ieee80211_vif *vif, 1162 struct ieee80211_if_conf *conf); 1163 void (*bss_info_changed)(struct ieee80211_hw *hw, 1164 struct ieee80211_vif *vif, 1165 struct ieee80211_bss_conf *info, 1166 u32 changed); 1167 void (*configure_filter)(struct ieee80211_hw *hw, 1168 unsigned int changed_flags, 1169 unsigned int *total_flags, 1170 int mc_count, struct dev_addr_list *mc_list); 1171 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1172 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1173 const u8 *local_address, const u8 *address, 1174 struct ieee80211_key_conf *key); 1175 void (*update_tkip_key)(struct ieee80211_hw *hw, 1176 struct ieee80211_key_conf *conf, const u8 *address, 1177 u32 iv32, u16 *phase1key); 1178 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1179 int (*get_stats)(struct ieee80211_hw *hw, 1180 struct ieee80211_low_level_stats *stats); 1181 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1182 u32 *iv32, u16 *iv16); 1183 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1184 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1185 int (*set_retry_limit)(struct ieee80211_hw *hw, 1186 u32 short_retry, u32 long_retr); 1187 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1188 enum sta_notify_cmd, const u8 *addr); 1189 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1190 const struct ieee80211_tx_queue_params *params); 1191 int (*get_tx_stats)(struct ieee80211_hw *hw, 1192 struct ieee80211_tx_queue_stats *stats); 1193 u64 (*get_tsf)(struct ieee80211_hw *hw); 1194 void (*reset_tsf)(struct ieee80211_hw *hw); 1195 int (*beacon_update)(struct ieee80211_hw *hw, 1196 struct sk_buff *skb); 1197 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1198 int (*ampdu_action)(struct ieee80211_hw *hw, 1199 enum ieee80211_ampdu_mlme_action action, 1200 const u8 *addr, u16 tid, u16 *ssn); 1201}; 1202 1203/** 1204 * ieee80211_alloc_hw - Allocate a new hardware device 1205 * 1206 * This must be called once for each hardware device. The returned pointer 1207 * must be used to refer to this device when calling other functions. 1208 * mac80211 allocates a private data area for the driver pointed to by 1209 * @priv in &struct ieee80211_hw, the size of this area is given as 1210 * @priv_data_len. 1211 * 1212 * @priv_data_len: length of private data 1213 * @ops: callbacks for this device 1214 */ 1215struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1216 const struct ieee80211_ops *ops); 1217 1218/** 1219 * ieee80211_register_hw - Register hardware device 1220 * 1221 * You must call this function before any other functions in 1222 * mac80211. Note that before a hardware can be registered, you 1223 * need to fill the contained wiphy's information. 1224 * 1225 * @hw: the device to register as returned by ieee80211_alloc_hw() 1226 */ 1227int ieee80211_register_hw(struct ieee80211_hw *hw); 1228 1229#ifdef CONFIG_MAC80211_LEDS 1230extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1231extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1232extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1233extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1234#endif 1235/** 1236 * ieee80211_get_tx_led_name - get name of TX LED 1237 * 1238 * mac80211 creates a transmit LED trigger for each wireless hardware 1239 * that can be used to drive LEDs if your driver registers a LED device. 1240 * This function returns the name (or %NULL if not configured for LEDs) 1241 * of the trigger so you can automatically link the LED device. 1242 * 1243 * @hw: the hardware to get the LED trigger name for 1244 */ 1245static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1246{ 1247#ifdef CONFIG_MAC80211_LEDS 1248 return __ieee80211_get_tx_led_name(hw); 1249#else 1250 return NULL; 1251#endif 1252} 1253 1254/** 1255 * ieee80211_get_rx_led_name - get name of RX LED 1256 * 1257 * mac80211 creates a receive LED trigger for each wireless hardware 1258 * that can be used to drive LEDs if your driver registers a LED device. 1259 * This function returns the name (or %NULL if not configured for LEDs) 1260 * of the trigger so you can automatically link the LED device. 1261 * 1262 * @hw: the hardware to get the LED trigger name for 1263 */ 1264static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1265{ 1266#ifdef CONFIG_MAC80211_LEDS 1267 return __ieee80211_get_rx_led_name(hw); 1268#else 1269 return NULL; 1270#endif 1271} 1272 1273/** 1274 * ieee80211_get_assoc_led_name - get name of association LED 1275 * 1276 * mac80211 creates a association LED trigger for each wireless hardware 1277 * that can be used to drive LEDs if your driver registers a LED device. 1278 * This function returns the name (or %NULL if not configured for LEDs) 1279 * of the trigger so you can automatically link the LED device. 1280 * 1281 * @hw: the hardware to get the LED trigger name for 1282 */ 1283static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1284{ 1285#ifdef CONFIG_MAC80211_LEDS 1286 return __ieee80211_get_assoc_led_name(hw); 1287#else 1288 return NULL; 1289#endif 1290} 1291 1292/** 1293 * ieee80211_get_radio_led_name - get name of radio LED 1294 * 1295 * mac80211 creates a radio change LED trigger for each wireless hardware 1296 * that can be used to drive LEDs if your driver registers a LED device. 1297 * This function returns the name (or %NULL if not configured for LEDs) 1298 * of the trigger so you can automatically link the LED device. 1299 * 1300 * @hw: the hardware to get the LED trigger name for 1301 */ 1302static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1303{ 1304#ifdef CONFIG_MAC80211_LEDS 1305 return __ieee80211_get_radio_led_name(hw); 1306#else 1307 return NULL; 1308#endif 1309} 1310 1311/** 1312 * ieee80211_unregister_hw - Unregister a hardware device 1313 * 1314 * This function instructs mac80211 to free allocated resources 1315 * and unregister netdevices from the networking subsystem. 1316 * 1317 * @hw: the hardware to unregister 1318 */ 1319void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1320 1321/** 1322 * ieee80211_free_hw - free hardware descriptor 1323 * 1324 * This function frees everything that was allocated, including the 1325 * private data for the driver. You must call ieee80211_unregister_hw() 1326 * before calling this function 1327 * 1328 * @hw: the hardware to free 1329 */ 1330void ieee80211_free_hw(struct ieee80211_hw *hw); 1331 1332/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1333void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1334 struct ieee80211_rx_status *status); 1335 1336/** 1337 * ieee80211_rx - receive frame 1338 * 1339 * Use this function to hand received frames to mac80211. The receive 1340 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1341 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1342 * 1343 * This function may not be called in IRQ context. Calls to this function 1344 * for a single hardware must be synchronized against each other. Calls 1345 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1346 * single hardware. 1347 * 1348 * @hw: the hardware this frame came in on 1349 * @skb: the buffer to receive, owned by mac80211 after this call 1350 * @status: status of this frame; the status pointer need not be valid 1351 * after this function returns 1352 */ 1353static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1354 struct ieee80211_rx_status *status) 1355{ 1356 __ieee80211_rx(hw, skb, status); 1357} 1358 1359/** 1360 * ieee80211_rx_irqsafe - receive frame 1361 * 1362 * Like ieee80211_rx() but can be called in IRQ context 1363 * (internally defers to a tasklet.) 1364 * 1365 * Calls to this function and ieee80211_rx() may not be mixed for a 1366 * single hardware. 1367 * 1368 * @hw: the hardware this frame came in on 1369 * @skb: the buffer to receive, owned by mac80211 after this call 1370 * @status: status of this frame; the status pointer need not be valid 1371 * after this function returns and is not freed by mac80211, 1372 * it is recommended that it points to a stack area 1373 */ 1374void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1375 struct sk_buff *skb, 1376 struct ieee80211_rx_status *status); 1377 1378/** 1379 * ieee80211_tx_status - transmit status callback 1380 * 1381 * Call this function for all transmitted frames after they have been 1382 * transmitted. It is permissible to not call this function for 1383 * multicast frames but this can affect statistics. 1384 * 1385 * This function may not be called in IRQ context. Calls to this function 1386 * for a single hardware must be synchronized against each other. Calls 1387 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1388 * for a single hardware. 1389 * 1390 * @hw: the hardware the frame was transmitted by 1391 * @skb: the frame that was transmitted, owned by mac80211 after this call 1392 */ 1393void ieee80211_tx_status(struct ieee80211_hw *hw, 1394 struct sk_buff *skb); 1395 1396/** 1397 * ieee80211_tx_status_irqsafe - irq-safe transmit status callback 1398 * 1399 * Like ieee80211_tx_status() but can be called in IRQ context 1400 * (internally defers to a tasklet.) 1401 * 1402 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1403 * single hardware. 1404 * 1405 * @hw: the hardware the frame was transmitted by 1406 * @skb: the frame that was transmitted, owned by mac80211 after this call 1407 */ 1408void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1409 struct sk_buff *skb); 1410 1411/** 1412 * ieee80211_beacon_get - beacon generation function 1413 * @hw: pointer obtained from ieee80211_alloc_hw(). 1414 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1415 * @control: will be filled with information needed to send this beacon. 1416 * 1417 * If the beacon frames are generated by the host system (i.e., not in 1418 * hardware/firmware), the low-level driver uses this function to receive 1419 * the next beacon frame from the 802.11 code. The low-level is responsible 1420 * for calling this function before beacon data is needed (e.g., based on 1421 * hardware interrupt). Returned skb is used only once and low-level driver 1422 * is responsible of freeing it. 1423 */ 1424struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1425 struct ieee80211_vif *vif); 1426 1427/** 1428 * ieee80211_rts_get - RTS frame generation function 1429 * @hw: pointer obtained from ieee80211_alloc_hw(). 1430 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1431 * @frame: pointer to the frame that is going to be protected by the RTS. 1432 * @frame_len: the frame length (in octets). 1433 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1434 * @rts: The buffer where to store the RTS frame. 1435 * 1436 * If the RTS frames are generated by the host system (i.e., not in 1437 * hardware/firmware), the low-level driver uses this function to receive 1438 * the next RTS frame from the 802.11 code. The low-level is responsible 1439 * for calling this function before and RTS frame is needed. 1440 */ 1441void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1442 const void *frame, size_t frame_len, 1443 const struct ieee80211_tx_info *frame_txctl, 1444 struct ieee80211_rts *rts); 1445 1446/** 1447 * ieee80211_rts_duration - Get the duration field for an RTS frame 1448 * @hw: pointer obtained from ieee80211_alloc_hw(). 1449 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1450 * @frame_len: the length of the frame that is going to be protected by the RTS. 1451 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1452 * 1453 * If the RTS is generated in firmware, but the host system must provide 1454 * the duration field, the low-level driver uses this function to receive 1455 * the duration field value in little-endian byteorder. 1456 */ 1457__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1458 struct ieee80211_vif *vif, size_t frame_len, 1459 const struct ieee80211_tx_info *frame_txctl); 1460 1461/** 1462 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1463 * @hw: pointer obtained from ieee80211_alloc_hw(). 1464 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1465 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1466 * @frame_len: the frame length (in octets). 1467 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1468 * @cts: The buffer where to store the CTS-to-self frame. 1469 * 1470 * If the CTS-to-self frames are generated by the host system (i.e., not in 1471 * hardware/firmware), the low-level driver uses this function to receive 1472 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1473 * for calling this function before and CTS-to-self frame is needed. 1474 */ 1475void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1476 struct ieee80211_vif *vif, 1477 const void *frame, size_t frame_len, 1478 const struct ieee80211_tx_info *frame_txctl, 1479 struct ieee80211_cts *cts); 1480 1481/** 1482 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1483 * @hw: pointer obtained from ieee80211_alloc_hw(). 1484 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1485 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1486 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1487 * 1488 * If the CTS-to-self is generated in firmware, but the host system must provide 1489 * the duration field, the low-level driver uses this function to receive 1490 * the duration field value in little-endian byteorder. 1491 */ 1492__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1493 struct ieee80211_vif *vif, 1494 size_t frame_len, 1495 const struct ieee80211_tx_info *frame_txctl); 1496 1497/** 1498 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1499 * @hw: pointer obtained from ieee80211_alloc_hw(). 1500 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1501 * @frame_len: the length of the frame. 1502 * @rate: the rate at which the frame is going to be transmitted. 1503 * 1504 * Calculate the duration field of some generic frame, given its 1505 * length and transmission rate (in 100kbps). 1506 */ 1507__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1508 struct ieee80211_vif *vif, 1509 size_t frame_len, 1510 struct ieee80211_rate *rate); 1511 1512/** 1513 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1514 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1515 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1516 * @control: will be filled with information needed to send returned frame. 1517 * 1518 * Function for accessing buffered broadcast and multicast frames. If 1519 * hardware/firmware does not implement buffering of broadcast/multicast 1520 * frames when power saving is used, 802.11 code buffers them in the host 1521 * memory. The low-level driver uses this function to fetch next buffered 1522 * frame. In most cases, this is used when generating beacon frame. This 1523 * function returns a pointer to the next buffered skb or NULL if no more 1524 * buffered frames are available. 1525 * 1526 * Note: buffered frames are returned only after DTIM beacon frame was 1527 * generated with ieee80211_beacon_get() and the low-level driver must thus 1528 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1529 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1530 * does not need to check for DTIM beacons separately and should be able to 1531 * use common code for all beacons. 1532 */ 1533struct sk_buff * 1534ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 1535 1536/** 1537 * ieee80211_get_hdrlen_from_skb - get header length from data 1538 * 1539 * Given an skb with a raw 802.11 header at the data pointer this function 1540 * returns the 802.11 header length in bytes (not including encryption 1541 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1542 * header the function returns 0. 1543 * 1544 * @skb: the frame 1545 */ 1546unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1547 1548/** 1549 * ieee80211_get_hdrlen - get header length from frame control 1550 * 1551 * This function returns the 802.11 header length in bytes (not including 1552 * encryption headers.) 1553 * 1554 * @fc: the frame control field (in CPU endianness) 1555 */ 1556int ieee80211_get_hdrlen(u16 fc); 1557 1558/** 1559 * ieee80211_hdrlen - get header length in bytes from frame control 1560 * @fc: frame control field in little-endian format 1561 */ 1562unsigned int ieee80211_hdrlen(__le16 fc); 1563 1564/** 1565 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1566 * 1567 * This function computes a TKIP rc4 key for an skb. It computes 1568 * a phase 1 key if needed (iv16 wraps around). This function is to 1569 * be used by drivers which can do HW encryption but need to compute 1570 * to phase 1/2 key in SW. 1571 * 1572 * @keyconf: the parameter passed with the set key 1573 * @skb: the skb for which the key is needed 1574 * @rc4key: a buffer to which the key will be written 1575 */ 1576void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1577 struct sk_buff *skb, 1578 enum ieee80211_tkip_key_type type, u8 *key); 1579/** 1580 * ieee80211_wake_queue - wake specific queue 1581 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1582 * @queue: queue number (counted from zero). 1583 * 1584 * Drivers should use this function instead of netif_wake_queue. 1585 */ 1586void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1587 1588/** 1589 * ieee80211_stop_queue - stop specific queue 1590 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1591 * @queue: queue number (counted from zero). 1592 * 1593 * Drivers should use this function instead of netif_stop_queue. 1594 */ 1595void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1596 1597/** 1598 * ieee80211_stop_queues - stop all queues 1599 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1600 * 1601 * Drivers should use this function instead of netif_stop_queue. 1602 */ 1603void ieee80211_stop_queues(struct ieee80211_hw *hw); 1604 1605/** 1606 * ieee80211_wake_queues - wake all queues 1607 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1608 * 1609 * Drivers should use this function instead of netif_wake_queue. 1610 */ 1611void ieee80211_wake_queues(struct ieee80211_hw *hw); 1612 1613/** 1614 * ieee80211_scan_completed - completed hardware scan 1615 * 1616 * When hardware scan offload is used (i.e. the hw_scan() callback is 1617 * assigned) this function needs to be called by the driver to notify 1618 * mac80211 that the scan finished. 1619 * 1620 * @hw: the hardware that finished the scan 1621 */ 1622void ieee80211_scan_completed(struct ieee80211_hw *hw); 1623 1624/** 1625 * ieee80211_iterate_active_interfaces- iterate active interfaces 1626 * 1627 * This function iterates over the interfaces associated with a given 1628 * hardware that are currently active and calls the callback for them. 1629 * This function allows the iterator function to sleep, when the iterator 1630 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 1631 * be used. 1632 * 1633 * @hw: the hardware struct of which the interfaces should be iterated over 1634 * @iterator: the iterator function to call 1635 * @data: first argument of the iterator function 1636 */ 1637void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1638 void (*iterator)(void *data, u8 *mac, 1639 struct ieee80211_vif *vif), 1640 void *data); 1641 1642/** 1643 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 1644 * 1645 * This function iterates over the interfaces associated with a given 1646 * hardware that are currently active and calls the callback for them. 1647 * This function requires the iterator callback function to be atomic, 1648 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 1649 * 1650 * @hw: the hardware struct of which the interfaces should be iterated over 1651 * @iterator: the iterator function to call, cannot sleep 1652 * @data: first argument of the iterator function 1653 */ 1654void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 1655 void (*iterator)(void *data, 1656 u8 *mac, 1657 struct ieee80211_vif *vif), 1658 void *data); 1659 1660/** 1661 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 1662 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1663 * @ra: receiver address of the BA session recipient 1664 * @tid: the TID to BA on. 1665 * @return: success if addBA request was sent, failure otherwise 1666 * 1667 * Although mac80211/low level driver/user space application can estimate 1668 * the need to start aggregation on a certain RA/TID, the session level 1669 * will be managed by the mac80211. 1670 */ 1671int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1672 1673/** 1674 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1675 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1676 * @ra: receiver address of the BA session recipient. 1677 * @tid: the TID to BA on. 1678 * 1679 * This function must be called by low level driver once it has 1680 * finished with preparations for the BA session. 1681 */ 1682void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1683 1684/** 1685 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1686 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1687 * @ra: receiver address of the BA session recipient. 1688 * @tid: the TID to BA on. 1689 * 1690 * This function must be called by low level driver once it has 1691 * finished with preparations for the BA session. 1692 * This version of the function is irq safe. 1693 */ 1694void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1695 u16 tid); 1696 1697/** 1698 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1699 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1700 * @ra: receiver address of the BA session recipient 1701 * @tid: the TID to stop BA. 1702 * @initiator: if indicates initiator DELBA frame will be sent. 1703 * @return: error if no sta with matching da found, success otherwise 1704 * 1705 * Although mac80211/low level driver/user space application can estimate 1706 * the need to stop aggregation on a certain RA/TID, the session level 1707 * will be managed by the mac80211. 1708 */ 1709int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1710 u8 *ra, u16 tid, 1711 enum ieee80211_back_parties initiator); 1712 1713/** 1714 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1715 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1716 * @ra: receiver address of the BA session recipient. 1717 * @tid: the desired TID to BA on. 1718 * 1719 * This function must be called by low level driver once it has 1720 * finished with preparations for the BA session tear down. 1721 */ 1722void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1723 1724/** 1725 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1726 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1727 * @ra: receiver address of the BA session recipient. 1728 * @tid: the desired TID to BA on. 1729 * 1730 * This function must be called by low level driver once it has 1731 * finished with preparations for the BA session tear down. 1732 * This version of the function is irq safe. 1733 */ 1734void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1735 u16 tid); 1736 1737/** 1738 * ieee80211_notify_mac - low level driver notification 1739 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1740 * @notification_types: enum ieee80211_notification_types 1741 * 1742 * This function must be called by low level driver to inform mac80211 of 1743 * low level driver status change or force mac80211 to re-assoc for low 1744 * level driver internal error that require re-assoc. 1745 */ 1746void ieee80211_notify_mac(struct ieee80211_hw *hw, 1747 enum ieee80211_notification_types notif_type); 1748#endif /* MAC80211_H */ 1749