mac80211.h revision 17741cdc264e4d768167766a252210e201c1519a
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-IRQ-safe 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] 119 * @cw_min: minimum contention window [a value of the form 120 * 2^n-1 in the range 1..32767] 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 u16 txop; 126 u16 cw_min; 127 u16 cw_max; 128 u8 aifs; 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_ERP_SLOT: slot timing changed 162 * @BSS_CHANGED_HT: 802.11n parameters changed 163 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 164 */ 165enum ieee80211_bss_change { 166 BSS_CHANGED_ASSOC = 1<<0, 167 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 168 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 169 BSS_CHANGED_ERP_SLOT = 1<<3, 170 BSS_CHANGED_HT = 1<<4, 171 BSS_CHANGED_BASIC_RATES = 1<<5, 172}; 173 174/** 175 * struct ieee80211_bss_conf - holds the BSS's changing parameters 176 * 177 * This structure keeps information about a BSS (and an association 178 * to that BSS) that can change during the lifetime of the BSS. 179 * 180 * @assoc: association status 181 * @aid: association ID number, valid only when @assoc is true 182 * @use_cts_prot: use CTS protection 183 * @use_short_preamble: use 802.11b short preamble 184 * @use_short_slot: use short slot time (only relevant for ERP) 185 * @dtim_period: num of beacons before the next DTIM, for PSM 186 * @timestamp: beacon timestamp 187 * @beacon_int: beacon interval 188 * @assoc_capability: capabilities taken from assoc resp 189 * @assoc_ht: association in HT mode 190 * @ht_conf: ht capabilities 191 * @ht_bss_conf: ht extended capabilities 192 * @basic_rates: bitmap of basic rates, each bit stands for an 193 * index into the rate table configured by the driver in 194 * the current band. 195 */ 196struct ieee80211_bss_conf { 197 /* association related data */ 198 bool assoc; 199 u16 aid; 200 /* erp related data */ 201 bool use_cts_prot; 202 bool use_short_preamble; 203 bool use_short_slot; 204 u8 dtim_period; 205 u16 beacon_int; 206 u16 assoc_capability; 207 u64 timestamp; 208 u64 basic_rates; 209 /* ht related data */ 210 bool assoc_ht; 211 struct ieee80211_ht_info *ht_conf; 212 struct ieee80211_ht_bss_info *ht_bss_conf; 213}; 214 215/** 216 * enum mac80211_tx_control_flags - flags to describe transmission information/status 217 * 218 * These flags are used with the @flags member of &ieee80211_tx_info. 219 * 220 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. 221 * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame 222 * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 223 * for combined 802.11g / 802.11b networks) 224 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 225 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD 226 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 227 * station 228 * @IEEE80211_TX_CTL_REQUEUE: TBD 229 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 230 * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD 231 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the 232 * through set_retry_limit configured long retry value 233 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 234 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 235 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 236 * of streams when this flag is on can be extracted from antenna_sel_tx, 237 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n 238 * antennas marked use MIMO_n. 239 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame 240 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 241 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 242 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval 243 * @IEEE80211_TX_CTL_INJECTED: TBD 244 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 245 * because the destination STA was in powersave mode. 246 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 247 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 248 * is for the whole aggregation. 249 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 250 * so consider using block ack request (BAR). 251 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 252 * number to this frame, taking care of not overwriting the fragment 253 * number and increasing the sequence number only when the 254 * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly 255 * assign sequence numbers to QoS-data frames but cannot do so correctly 256 * for non-QoS-data and management frames because beacons need them from 257 * that counter as well and mac80211 cannot guarantee proper sequencing. 258 * If this flag is set, the driver should instruct the hardware to 259 * assign a sequence number to the frame or assign one itself. Cf. IEEE 260 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 261 * beacons always be clear for frames without a sequence number field. 262 */ 263enum mac80211_tx_control_flags { 264 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 265 IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2), 266 IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3), 267 IEEE80211_TX_CTL_NO_ACK = BIT(4), 268 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5), 269 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6), 270 IEEE80211_TX_CTL_REQUEUE = BIT(7), 271 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8), 272 IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9), 273 IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10), 274 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12), 275 IEEE80211_TX_CTL_AMPDU = BIT(13), 276 IEEE80211_TX_CTL_OFDM_HT = BIT(14), 277 IEEE80211_TX_CTL_GREEN_FIELD = BIT(15), 278 IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16), 279 IEEE80211_TX_CTL_DUP_DATA = BIT(17), 280 IEEE80211_TX_CTL_SHORT_GI = BIT(18), 281 IEEE80211_TX_CTL_INJECTED = BIT(19), 282 IEEE80211_TX_STAT_TX_FILTERED = BIT(20), 283 IEEE80211_TX_STAT_ACK = BIT(21), 284 IEEE80211_TX_STAT_AMPDU = BIT(22), 285 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23), 286 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24), 287}; 288 289 290#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \ 291 (sizeof(((struct sk_buff *)0)->cb) - 8) 292#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \ 293 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)) 294 295/** 296 * struct ieee80211_tx_info - skb transmit information 297 * 298 * This structure is placed in skb->cb for three uses: 299 * (1) mac80211 TX control - mac80211 tells the driver what to do 300 * (2) driver internal use (if applicable) 301 * (3) TX status information - driver tells mac80211 what happened 302 * 303 * The TX control's sta pointer is only valid during the ->tx call, 304 * it may be NULL. 305 * 306 * @flags: transmit info flags, defined above 307 * @band: TBD 308 * @tx_rate_idx: TBD 309 * @antenna_sel_tx: TBD 310 * @control: union for control data 311 * @status: union for status data 312 * @driver_data: array of driver_data pointers 313 * @retry_count: number of retries 314 * @excessive_retries: set to 1 if the frame was retried many times 315 * but not acknowledged 316 * @ampdu_ack_len: number of aggregated frames. 317 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 318 * @ampdu_ack_map: block ack bit map for the aggregation. 319 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 320 * @ack_signal: signal strength of the ACK frame 321 */ 322struct ieee80211_tx_info { 323 /* common information */ 324 u32 flags; 325 u8 band; 326 s8 tx_rate_idx; 327 u8 antenna_sel_tx; 328 329 /* 1 byte hole */ 330 331 union { 332 struct { 333 struct ieee80211_vif *vif; 334 struct ieee80211_key_conf *hw_key; 335 struct ieee80211_sta *sta; 336 unsigned long jiffies; 337 s8 rts_cts_rate_idx, alt_retry_rate_idx; 338 u8 retry_limit; 339 u8 icv_len; 340 u8 iv_len; 341 } control; 342 struct { 343 u64 ampdu_ack_map; 344 int ack_signal; 345 u8 retry_count; 346 bool excessive_retries; 347 u8 ampdu_ack_len; 348 } status; 349 void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS]; 350 }; 351}; 352 353static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 354{ 355 return (struct ieee80211_tx_info *)skb->cb; 356} 357 358 359/** 360 * enum mac80211_rx_flags - receive flags 361 * 362 * These flags are used with the @flag member of &struct ieee80211_rx_status. 363 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 364 * Use together with %RX_FLAG_MMIC_STRIPPED. 365 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 366 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 367 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 368 * verification has been done by the hardware. 369 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 370 * If this flag is set, the stack cannot do any replay detection 371 * hence the driver or hardware will have to do that. 372 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 373 * the frame. 374 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 375 * the frame. 376 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 377 * is valid. This is useful in monitor mode and necessary for beacon frames 378 * to enable IBSS merging. 379 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 380 */ 381enum mac80211_rx_flags { 382 RX_FLAG_MMIC_ERROR = 1<<0, 383 RX_FLAG_DECRYPTED = 1<<1, 384 RX_FLAG_RADIOTAP = 1<<2, 385 RX_FLAG_MMIC_STRIPPED = 1<<3, 386 RX_FLAG_IV_STRIPPED = 1<<4, 387 RX_FLAG_FAILED_FCS_CRC = 1<<5, 388 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 389 RX_FLAG_TSFT = 1<<7, 390 RX_FLAG_SHORTPRE = 1<<8 391}; 392 393/** 394 * struct ieee80211_rx_status - receive status 395 * 396 * The low-level driver should provide this information (the subset 397 * supported by hardware) to the 802.11 code with each received 398 * frame. 399 * 400 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 401 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 402 * @band: the active band when this frame was received 403 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 404 * @signal: signal strength when receiving this frame, either in dBm, in dB or 405 * unspecified depending on the hardware capabilities flags 406 * @IEEE80211_HW_SIGNAL_* 407 * @noise: noise when receiving this frame, in dBm. 408 * @qual: overall signal quality indication, in percent (0-100). 409 * @antenna: antenna used 410 * @rate_idx: index of data rate into band's supported rates 411 * @flag: %RX_FLAG_* 412 */ 413struct ieee80211_rx_status { 414 u64 mactime; 415 enum ieee80211_band band; 416 int freq; 417 int signal; 418 int noise; 419 int qual; 420 int antenna; 421 int rate_idx; 422 int flag; 423}; 424 425/** 426 * enum ieee80211_conf_flags - configuration flags 427 * 428 * Flags to define PHY configuration options 429 * 430 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 431 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 432 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 433 * @IEEE80211_CONF_PS: Enable 802.11 power save mode 434 */ 435enum ieee80211_conf_flags { 436 /* 437 * TODO: IEEE80211_CONF_SHORT_SLOT_TIME will be removed once drivers 438 * have been converted to use bss_info_changed() for slot time 439 * configuration 440 */ 441 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 442 IEEE80211_CONF_RADIOTAP = (1<<1), 443 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 444 IEEE80211_CONF_PS = (1<<3), 445}; 446 447/** 448 * struct ieee80211_conf - configuration of the device 449 * 450 * This struct indicates how the driver shall configure the hardware. 451 * 452 * @radio_enabled: when zero, driver is required to switch off the radio. 453 * TODO make a flag 454 * @beacon_int: beacon interval (TODO make interface config) 455 * @listen_interval: listen interval in units of beacon interval 456 * @flags: configuration flags defined above 457 * @power_level: requested transmit power (in dBm) 458 * @max_antenna_gain: maximum antenna gain (in dBi) 459 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 460 * 1/2: antenna 0/1 461 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 462 * @ht_conf: describes current self configuration of 802.11n HT capabilies 463 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 464 * @channel: the channel to tune to 465 */ 466struct ieee80211_conf { 467 int radio_enabled; 468 469 int beacon_int; 470 u16 listen_interval; 471 u32 flags; 472 int power_level; 473 int max_antenna_gain; 474 u8 antenna_sel_tx; 475 u8 antenna_sel_rx; 476 477 struct ieee80211_channel *channel; 478 479 struct ieee80211_ht_info ht_conf; 480 struct ieee80211_ht_bss_info ht_bss_conf; 481}; 482 483/** 484 * struct ieee80211_vif - per-interface data 485 * 486 * Data in this structure is continually present for driver 487 * use during the life of a virtual interface. 488 * 489 * @type: type of this virtual interface 490 * @drv_priv: data area for driver use, will always be aligned to 491 * sizeof(void *). 492 */ 493struct ieee80211_vif { 494 enum nl80211_iftype type; 495 /* must be last */ 496 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 497}; 498 499static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 500{ 501#ifdef CONFIG_MAC80211_MESH 502 return vif->type == NL80211_IFTYPE_MESH_POINT; 503#endif 504 return false; 505} 506 507/** 508 * struct ieee80211_if_init_conf - initial configuration of an interface 509 * 510 * @vif: pointer to a driver-use per-interface structure. The pointer 511 * itself is also used for various functions including 512 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 513 * @type: one of &enum nl80211_iftype constants. Determines the type of 514 * added/removed interface. 515 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 516 * until the interface is removed (i.e. it cannot be used after 517 * remove_interface() callback was called for this interface). 518 * 519 * This structure is used in add_interface() and remove_interface() 520 * callbacks of &struct ieee80211_hw. 521 * 522 * When you allow multiple interfaces to be added to your PHY, take care 523 * that the hardware can actually handle multiple MAC addresses. However, 524 * also take care that when there's no interface left with mac_addr != %NULL 525 * you remove the MAC address from the device to avoid acknowledging packets 526 * in pure monitor mode. 527 */ 528struct ieee80211_if_init_conf { 529 enum nl80211_iftype type; 530 struct ieee80211_vif *vif; 531 void *mac_addr; 532}; 533 534/** 535 * enum ieee80211_if_conf_change - interface config change flags 536 * 537 * @IEEE80211_IFCC_BSSID: The BSSID changed. 538 * @IEEE80211_IFCC_SSID: The SSID changed. 539 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed 540 * (currently AP and MESH only), use ieee80211_beacon_get(). 541 */ 542enum ieee80211_if_conf_change { 543 IEEE80211_IFCC_BSSID = BIT(0), 544 IEEE80211_IFCC_SSID = BIT(1), 545 IEEE80211_IFCC_BEACON = BIT(2), 546}; 547 548/** 549 * struct ieee80211_if_conf - configuration of an interface 550 * 551 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change. 552 * @bssid: BSSID of the network we are associated to/creating. 553 * @ssid: used (together with @ssid_len) by drivers for hardware that 554 * generate beacons independently. The pointer is valid only during the 555 * config_interface() call, so copy the value somewhere if you need 556 * it. 557 * @ssid_len: length of the @ssid field. 558 * 559 * This structure is passed to the config_interface() callback of 560 * &struct ieee80211_hw. 561 */ 562struct ieee80211_if_conf { 563 u32 changed; 564 u8 *bssid; 565 u8 *ssid; 566 size_t ssid_len; 567}; 568 569/** 570 * enum ieee80211_key_alg - key algorithm 571 * @ALG_WEP: WEP40 or WEP104 572 * @ALG_TKIP: TKIP 573 * @ALG_CCMP: CCMP (AES) 574 */ 575enum ieee80211_key_alg { 576 ALG_WEP, 577 ALG_TKIP, 578 ALG_CCMP, 579}; 580 581/** 582 * enum ieee80211_key_len - key length 583 * @LEN_WEP40: WEP 5-byte long key 584 * @LEN_WEP104: WEP 13-byte long key 585 */ 586enum ieee80211_key_len { 587 LEN_WEP40 = 5, 588 LEN_WEP104 = 13, 589}; 590 591/** 592 * enum ieee80211_key_flags - key flags 593 * 594 * These flags are used for communication about keys between the driver 595 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 596 * 597 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 598 * that the STA this key will be used with could be using QoS. 599 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 600 * driver to indicate that it requires IV generation for this 601 * particular key. 602 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 603 * the driver for a TKIP key if it requires Michael MIC 604 * generation in software. 605 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 606 * that the key is pairwise rather then a shared key. 607 */ 608enum ieee80211_key_flags { 609 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 610 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 611 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 612 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 613}; 614 615/** 616 * struct ieee80211_key_conf - key information 617 * 618 * This key information is given by mac80211 to the driver by 619 * the set_key() callback in &struct ieee80211_ops. 620 * 621 * @hw_key_idx: To be set by the driver, this is the key index the driver 622 * wants to be given when a frame is transmitted and needs to be 623 * encrypted in hardware. 624 * @alg: The key algorithm. 625 * @flags: key flags, see &enum ieee80211_key_flags. 626 * @keyidx: the key index (0-3) 627 * @keylen: key material length 628 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 629 * data block: 630 * - Temporal Encryption Key (128 bits) 631 * - Temporal Authenticator Tx MIC Key (64 bits) 632 * - Temporal Authenticator Rx MIC Key (64 bits) 633 * 634 */ 635struct ieee80211_key_conf { 636 enum ieee80211_key_alg alg; 637 u8 hw_key_idx; 638 u8 flags; 639 s8 keyidx; 640 u8 keylen; 641 u8 key[0]; 642}; 643 644/** 645 * enum set_key_cmd - key command 646 * 647 * Used with the set_key() callback in &struct ieee80211_ops, this 648 * indicates whether a key is being removed or added. 649 * 650 * @SET_KEY: a key is set 651 * @DISABLE_KEY: a key must be disabled 652 */ 653enum set_key_cmd { 654 SET_KEY, DISABLE_KEY, 655}; 656 657/** 658 * struct ieee80211_sta - station table entry 659 * 660 * A station table entry represents a station we are possibly 661 * communicating with. Since stations are RCU-managed in 662 * mac80211, any ieee80211_sta pointer you get access to must 663 * either be protected by rcu_read_lock() explicitly or implicitly, 664 * or you must take good care to not use such a pointer after a 665 * call to your sta_notify callback that removed it. 666 * 667 * @addr: MAC address 668 * @aid: AID we assigned to the station if we're an AP 669 * @drv_priv: data area for driver use, will always be aligned to 670 * sizeof(void *), size is determined in hw information. 671 */ 672struct ieee80211_sta { 673 u8 addr[ETH_ALEN]; 674 u16 aid; 675 676 /* must be last */ 677 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 678}; 679 680/** 681 * enum sta_notify_cmd - sta notify command 682 * 683 * Used with the sta_notify() callback in &struct ieee80211_ops, this 684 * indicates addition and removal of a station to station table. 685 * 686 * @STA_NOTIFY_ADD: a station was added to the station table 687 * @STA_NOTIFY_REMOVE: a station being removed from the station table 688 */ 689enum sta_notify_cmd { 690 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 691}; 692 693/** 694 * enum ieee80211_tkip_key_type - get tkip key 695 * 696 * Used by drivers which need to get a tkip key for skb. Some drivers need a 697 * phase 1 key, others need a phase 2 key. A single function allows the driver 698 * to get the key, this enum indicates what type of key is required. 699 * 700 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 701 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 702 */ 703enum ieee80211_tkip_key_type { 704 IEEE80211_TKIP_P1_KEY, 705 IEEE80211_TKIP_P2_KEY, 706}; 707 708/** 709 * enum ieee80211_hw_flags - hardware flags 710 * 711 * These flags are used to indicate hardware capabilities to 712 * the stack. Generally, flags here should have their meaning 713 * done in a way that the simplest hardware doesn't need setting 714 * any particular flags. There are some exceptions to this rule, 715 * however, so you are advised to review these flags carefully. 716 * 717 * @IEEE80211_HW_RX_INCLUDES_FCS: 718 * Indicates that received frames passed to the stack include 719 * the FCS at the end. 720 * 721 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 722 * Some wireless LAN chipsets buffer broadcast/multicast frames 723 * for power saving stations in the hardware/firmware and others 724 * rely on the host system for such buffering. This option is used 725 * to configure the IEEE 802.11 upper layer to buffer broadcast and 726 * multicast frames when there are power saving stations so that 727 * the driver can fetch them with ieee80211_get_buffered_bc(). 728 * 729 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 730 * Hardware is not capable of short slot operation on the 2.4 GHz band. 731 * 732 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 733 * Hardware is not capable of receiving frames with short preamble on 734 * the 2.4 GHz band. 735 * 736 * @IEEE80211_HW_SIGNAL_UNSPEC: 737 * Hardware can provide signal values but we don't know its units. We 738 * expect values between 0 and @max_signal. 739 * If possible please provide dB or dBm instead. 740 * 741 * @IEEE80211_HW_SIGNAL_DB: 742 * Hardware gives signal values in dB, decibel difference from an 743 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 744 * If possible please provide dBm instead. 745 * 746 * @IEEE80211_HW_SIGNAL_DBM: 747 * Hardware gives signal values in dBm, decibel difference from 748 * one milliwatt. This is the preferred method since it is standardized 749 * between different devices. @max_signal does not need to be set. 750 * 751 * @IEEE80211_HW_NOISE_DBM: 752 * Hardware can provide noise (radio interference) values in units dBm, 753 * decibel difference from one milliwatt. 754 * 755 * @IEEE80211_HW_SPECTRUM_MGMT: 756 * Hardware supports spectrum management defined in 802.11h 757 * Measurement, Channel Switch, Quieting, TPC 758 */ 759enum ieee80211_hw_flags { 760 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 761 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 762 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 763 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 764 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 765 IEEE80211_HW_SIGNAL_DB = 1<<6, 766 IEEE80211_HW_SIGNAL_DBM = 1<<7, 767 IEEE80211_HW_NOISE_DBM = 1<<8, 768 IEEE80211_HW_SPECTRUM_MGMT = 1<<9, 769}; 770 771/** 772 * struct ieee80211_hw - hardware information and state 773 * 774 * This structure contains the configuration and hardware 775 * information for an 802.11 PHY. 776 * 777 * @wiphy: This points to the &struct wiphy allocated for this 778 * 802.11 PHY. You must fill in the @perm_addr and @dev 779 * members of this structure using SET_IEEE80211_DEV() 780 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 781 * bands (with channels, bitrates) are registered here. 782 * 783 * @conf: &struct ieee80211_conf, device configuration, don't use. 784 * 785 * @workqueue: single threaded workqueue available for driver use, 786 * allocated by mac80211 on registration and flushed when an 787 * interface is removed. 788 * NOTICE: All work performed on this workqueue should NEVER 789 * acquire the RTNL lock (i.e. Don't use the function 790 * ieee80211_iterate_active_interfaces()) 791 * 792 * @priv: pointer to private area that was allocated for driver use 793 * along with this structure. 794 * 795 * @flags: hardware flags, see &enum ieee80211_hw_flags. 796 * 797 * @extra_tx_headroom: headroom to reserve in each transmit skb 798 * for use by the driver (e.g. for transmit headers.) 799 * 800 * @channel_change_time: time (in microseconds) it takes to change channels. 801 * 802 * @max_signal: Maximum value for signal (rssi) in RX information, used 803 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 804 * 805 * @max_listen_interval: max listen interval in units of beacon interval 806 * that HW supports 807 * 808 * @queues: number of available hardware transmit queues for 809 * data packets. WMM/QoS requires at least four, these 810 * queues need to have configurable access parameters. 811 * 812 * @ampdu_queues: number of available hardware transmit queues 813 * for A-MPDU packets, these have no access parameters 814 * because they're used only for A-MPDU frames. Note that 815 * mac80211 will not currently use any of the regular queues 816 * for aggregation. 817 * 818 * @rate_control_algorithm: rate control algorithm for this hardware. 819 * If unset (NULL), the default algorithm will be used. Must be 820 * set before calling ieee80211_register_hw(). 821 * 822 * @vif_data_size: size (in bytes) of the drv_priv data area 823 * within &struct ieee80211_vif. 824 * @sta_data_size: size (in bytes) of the drv_priv data area 825 * within &struct ieee80211_sta. 826 */ 827struct ieee80211_hw { 828 struct ieee80211_conf conf; 829 struct wiphy *wiphy; 830 struct workqueue_struct *workqueue; 831 const char *rate_control_algorithm; 832 void *priv; 833 u32 flags; 834 unsigned int extra_tx_headroom; 835 int channel_change_time; 836 int vif_data_size; 837 int sta_data_size; 838 u16 queues; 839 u16 ampdu_queues; 840 u16 max_listen_interval; 841 s8 max_signal; 842}; 843 844struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy); 845 846/** 847 * SET_IEEE80211_DEV - set device for 802.11 hardware 848 * 849 * @hw: the &struct ieee80211_hw to set the device for 850 * @dev: the &struct device of this 802.11 device 851 */ 852static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 853{ 854 set_wiphy_dev(hw->wiphy, dev); 855} 856 857/** 858 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 859 * 860 * @hw: the &struct ieee80211_hw to set the MAC address for 861 * @addr: the address to set 862 */ 863static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 864{ 865 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 866} 867 868static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw) 869{ 870 return hw->queues; 871} 872 873static inline int ieee80211_num_queues(struct ieee80211_hw *hw) 874{ 875 return hw->queues + hw->ampdu_queues; 876} 877 878static inline struct ieee80211_rate * 879ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 880 const struct ieee80211_tx_info *c) 881{ 882 if (WARN_ON(c->tx_rate_idx < 0)) 883 return NULL; 884 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 885} 886 887static inline struct ieee80211_rate * 888ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 889 const struct ieee80211_tx_info *c) 890{ 891 if (c->control.rts_cts_rate_idx < 0) 892 return NULL; 893 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 894} 895 896static inline struct ieee80211_rate * 897ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 898 const struct ieee80211_tx_info *c) 899{ 900 if (c->control.alt_retry_rate_idx < 0) 901 return NULL; 902 return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx]; 903} 904 905/** 906 * DOC: Hardware crypto acceleration 907 * 908 * mac80211 is capable of taking advantage of many hardware 909 * acceleration designs for encryption and decryption operations. 910 * 911 * The set_key() callback in the &struct ieee80211_ops for a given 912 * device is called to enable hardware acceleration of encryption and 913 * decryption. The callback takes an @address parameter that will be 914 * the broadcast address for default keys, the other station's hardware 915 * address for individual keys or the zero address for keys that will 916 * be used only for transmission. 917 * Multiple transmission keys with the same key index may be used when 918 * VLANs are configured for an access point. 919 * 920 * The @local_address parameter will always be set to our own address, 921 * this is only relevant if you support multiple local addresses. 922 * 923 * When transmitting, the TX control data will use the @hw_key_idx 924 * selected by the driver by modifying the &struct ieee80211_key_conf 925 * pointed to by the @key parameter to the set_key() function. 926 * 927 * The set_key() call for the %SET_KEY command should return 0 if 928 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 929 * added; if you return 0 then hw_key_idx must be assigned to the 930 * hardware key index, you are free to use the full u8 range. 931 * 932 * When the cmd is %DISABLE_KEY then it must succeed. 933 * 934 * Note that it is permissible to not decrypt a frame even if a key 935 * for it has been uploaded to hardware, the stack will not make any 936 * decision based on whether a key has been uploaded or not but rather 937 * based on the receive flags. 938 * 939 * The &struct ieee80211_key_conf structure pointed to by the @key 940 * parameter is guaranteed to be valid until another call to set_key() 941 * removes it, but it can only be used as a cookie to differentiate 942 * keys. 943 * 944 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 945 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 946 * handler. 947 * The update_tkip_key() call updates the driver with the new phase 1 key. 948 * This happens everytime the iv16 wraps around (every 65536 packets). The 949 * set_key() call will happen only once for each key (unless the AP did 950 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 951 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 952 * handler is software decryption with wrap around of iv16. 953 */ 954 955/** 956 * DOC: Frame filtering 957 * 958 * mac80211 requires to see many management frames for proper 959 * operation, and users may want to see many more frames when 960 * in monitor mode. However, for best CPU usage and power consumption, 961 * having as few frames as possible percolate through the stack is 962 * desirable. Hence, the hardware should filter as much as possible. 963 * 964 * To achieve this, mac80211 uses filter flags (see below) to tell 965 * the driver's configure_filter() function which frames should be 966 * passed to mac80211 and which should be filtered out. 967 * 968 * The configure_filter() callback is invoked with the parameters 969 * @mc_count and @mc_list for the combined multicast address list 970 * of all virtual interfaces, @changed_flags telling which flags 971 * were changed and @total_flags with the new flag states. 972 * 973 * If your device has no multicast address filters your driver will 974 * need to check both the %FIF_ALLMULTI flag and the @mc_count 975 * parameter to see whether multicast frames should be accepted 976 * or dropped. 977 * 978 * All unsupported flags in @total_flags must be cleared. 979 * Hardware does not support a flag if it is incapable of _passing_ 980 * the frame to the stack. Otherwise the driver must ignore 981 * the flag, but not clear it. 982 * You must _only_ clear the flag (announce no support for the 983 * flag to mac80211) if you are not able to pass the packet type 984 * to the stack (so the hardware always filters it). 985 * So for example, you should clear @FIF_CONTROL, if your hardware 986 * always filters control frames. If your hardware always passes 987 * control frames to the kernel and is incapable of filtering them, 988 * you do _not_ clear the @FIF_CONTROL flag. 989 * This rule applies to all other FIF flags as well. 990 */ 991 992/** 993 * enum ieee80211_filter_flags - hardware filter flags 994 * 995 * These flags determine what the filter in hardware should be 996 * programmed to let through and what should not be passed to the 997 * stack. It is always safe to pass more frames than requested, 998 * but this has negative impact on power consumption. 999 * 1000 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1001 * think of the BSS as your network segment and then this corresponds 1002 * to the regular ethernet device promiscuous mode. 1003 * 1004 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1005 * by the user or if the hardware is not capable of filtering by 1006 * multicast address. 1007 * 1008 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1009 * %RX_FLAG_FAILED_FCS_CRC for them) 1010 * 1011 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1012 * the %RX_FLAG_FAILED_PLCP_CRC for them 1013 * 1014 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1015 * to the hardware that it should not filter beacons or probe responses 1016 * by BSSID. Filtering them can greatly reduce the amount of processing 1017 * mac80211 needs to do and the amount of CPU wakeups, so you should 1018 * honour this flag if possible. 1019 * 1020 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 1021 * only those addressed to this station 1022 * 1023 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1024 */ 1025enum ieee80211_filter_flags { 1026 FIF_PROMISC_IN_BSS = 1<<0, 1027 FIF_ALLMULTI = 1<<1, 1028 FIF_FCSFAIL = 1<<2, 1029 FIF_PLCPFAIL = 1<<3, 1030 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1031 FIF_CONTROL = 1<<5, 1032 FIF_OTHER_BSS = 1<<6, 1033}; 1034 1035/** 1036 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1037 * 1038 * These flags are used with the ampdu_action() callback in 1039 * &struct ieee80211_ops to indicate which action is needed. 1040 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1041 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1042 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1043 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1044 */ 1045enum ieee80211_ampdu_mlme_action { 1046 IEEE80211_AMPDU_RX_START, 1047 IEEE80211_AMPDU_RX_STOP, 1048 IEEE80211_AMPDU_TX_START, 1049 IEEE80211_AMPDU_TX_STOP, 1050}; 1051 1052/** 1053 * struct ieee80211_ops - callbacks from mac80211 to the driver 1054 * 1055 * This structure contains various callbacks that the driver may 1056 * handle or, in some cases, must handle, for example to configure 1057 * the hardware to a new channel or to transmit a frame. 1058 * 1059 * @tx: Handler that 802.11 module calls for each transmitted frame. 1060 * skb contains the buffer starting from the IEEE 802.11 header. 1061 * The low-level driver should send the frame out based on 1062 * configuration in the TX control data. This handler should, 1063 * preferably, never fail and stop queues appropriately, more 1064 * importantly, however, it must never fail for A-MPDU-queues. 1065 * Must be implemented and atomic. 1066 * 1067 * @start: Called before the first netdevice attached to the hardware 1068 * is enabled. This should turn on the hardware and must turn on 1069 * frame reception (for possibly enabled monitor interfaces.) 1070 * Returns negative error codes, these may be seen in userspace, 1071 * or zero. 1072 * When the device is started it should not have a MAC address 1073 * to avoid acknowledging frames before a non-monitor device 1074 * is added. 1075 * Must be implemented. 1076 * 1077 * @stop: Called after last netdevice attached to the hardware 1078 * is disabled. This should turn off the hardware (at least 1079 * it must turn off frame reception.) 1080 * May be called right after add_interface if that rejects 1081 * an interface. 1082 * Must be implemented. 1083 * 1084 * @add_interface: Called when a netdevice attached to the hardware is 1085 * enabled. Because it is not called for monitor mode devices, @open 1086 * and @stop must be implemented. 1087 * The driver should perform any initialization it needs before 1088 * the device can be enabled. The initial configuration for the 1089 * interface is given in the conf parameter. 1090 * The callback may refuse to add an interface by returning a 1091 * negative error code (which will be seen in userspace.) 1092 * Must be implemented. 1093 * 1094 * @remove_interface: Notifies a driver that an interface is going down. 1095 * The @stop callback is called after this if it is the last interface 1096 * and no monitor interfaces are present. 1097 * When all interfaces are removed, the MAC address in the hardware 1098 * must be cleared so the device no longer acknowledges packets, 1099 * the mac_addr member of the conf structure is, however, set to the 1100 * MAC address of the device going away. 1101 * Hence, this callback must be implemented. 1102 * 1103 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1104 * function to change hardware configuration, e.g., channel. 1105 * 1106 * @config_interface: Handler for configuration requests related to interfaces 1107 * (e.g. BSSID changes.) 1108 * 1109 * @bss_info_changed: Handler for configuration requests related to BSS 1110 * parameters that may vary during BSS's lifespan, and may affect low 1111 * level driver (e.g. assoc/disassoc status, erp parameters). 1112 * This function should not be used if no BSS has been set, unless 1113 * for association indication. The @changed parameter indicates which 1114 * of the bss parameters has changed when a call is made. 1115 * 1116 * @configure_filter: Configure the device's RX filter. 1117 * See the section "Frame filtering" for more information. 1118 * This callback must be implemented and atomic. 1119 * 1120 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1121 * must be set or cleared for a given STA. Must be atomic. 1122 * 1123 * @set_key: See the section "Hardware crypto acceleration" 1124 * This callback can sleep, and is only called between add_interface 1125 * and remove_interface calls, i.e. while the interface with the 1126 * given local_address is enabled. 1127 * 1128 * @update_tkip_key: See the section "Hardware crypto acceleration" 1129 * This callback will be called in the context of Rx. Called for drivers 1130 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1131 * 1132 * @hw_scan: Ask the hardware to service the scan request, no need to start 1133 * the scan state machine in stack. The scan must honour the channel 1134 * configuration done by the regulatory agent in the wiphy's registered 1135 * bands. When the scan finishes, ieee80211_scan_completed() must be 1136 * called; note that it also must be called when the scan cannot finish 1137 * because the hardware is turned off! Anything else is a bug! 1138 * 1139 * @get_stats: return low-level statistics 1140 * 1141 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1142 * callback should be provided to read the TKIP transmit IVs (both IV32 1143 * and IV16) for the given key from hardware. 1144 * 1145 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1146 * 1147 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1148 * the device does fragmentation by itself; if this method is assigned then 1149 * the stack will not do fragmentation. 1150 * 1151 * @set_retry_limit: Configuration of retry limits (if device needs it) 1152 * 1153 * @sta_notify: Notifies low level driver about addition or removal 1154 * of assocaited station or AP. 1155 * 1156 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1157 * bursting) for a hardware TX queue. 1158 * 1159 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1160 * to get number of currently queued packets (queue length), maximum queue 1161 * size (limit), and total number of packets sent using each TX queue 1162 * (count). The 'stats' pointer points to an array that has hw->queues + 1163 * hw->ampdu_queues items. 1164 * 1165 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1166 * this is only used for IBSS mode debugging and, as such, is not a 1167 * required function. Must be atomic. 1168 * 1169 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1170 * with other STAs in the IBSS. This is only used in IBSS mode. This 1171 * function is optional if the firmware/hardware takes full care of 1172 * TSF synchronization. 1173 * 1174 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1175 * This is needed only for IBSS mode and the result of this function is 1176 * used to determine whether to reply to Probe Requests. 1177 * 1178 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1179 * 1180 * @ampdu_action: Perform a certain A-MPDU action 1181 * The RA/TID combination determines the destination and TID we want 1182 * the ampdu action to be performed for. The action is defined through 1183 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1184 * is the first frame we expect to perform the action on. notice 1185 * that TX/RX_STOP can pass NULL for this parameter. 1186 */ 1187struct ieee80211_ops { 1188 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1189 int (*start)(struct ieee80211_hw *hw); 1190 void (*stop)(struct ieee80211_hw *hw); 1191 int (*add_interface)(struct ieee80211_hw *hw, 1192 struct ieee80211_if_init_conf *conf); 1193 void (*remove_interface)(struct ieee80211_hw *hw, 1194 struct ieee80211_if_init_conf *conf); 1195 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1196 int (*config_interface)(struct ieee80211_hw *hw, 1197 struct ieee80211_vif *vif, 1198 struct ieee80211_if_conf *conf); 1199 void (*bss_info_changed)(struct ieee80211_hw *hw, 1200 struct ieee80211_vif *vif, 1201 struct ieee80211_bss_conf *info, 1202 u32 changed); 1203 void (*configure_filter)(struct ieee80211_hw *hw, 1204 unsigned int changed_flags, 1205 unsigned int *total_flags, 1206 int mc_count, struct dev_addr_list *mc_list); 1207 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1208 bool set); 1209 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1210 const u8 *local_address, const u8 *address, 1211 struct ieee80211_key_conf *key); 1212 void (*update_tkip_key)(struct ieee80211_hw *hw, 1213 struct ieee80211_key_conf *conf, const u8 *address, 1214 u32 iv32, u16 *phase1key); 1215 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1216 int (*get_stats)(struct ieee80211_hw *hw, 1217 struct ieee80211_low_level_stats *stats); 1218 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1219 u32 *iv32, u16 *iv16); 1220 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1221 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1222 int (*set_retry_limit)(struct ieee80211_hw *hw, 1223 u32 short_retry, u32 long_retr); 1224 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1225 enum sta_notify_cmd, struct ieee80211_sta *sta); 1226 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1227 const struct ieee80211_tx_queue_params *params); 1228 int (*get_tx_stats)(struct ieee80211_hw *hw, 1229 struct ieee80211_tx_queue_stats *stats); 1230 u64 (*get_tsf)(struct ieee80211_hw *hw); 1231 void (*reset_tsf)(struct ieee80211_hw *hw); 1232 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1233 int (*ampdu_action)(struct ieee80211_hw *hw, 1234 enum ieee80211_ampdu_mlme_action action, 1235 struct ieee80211_sta *sta, u16 tid, u16 *ssn); 1236}; 1237 1238/** 1239 * ieee80211_alloc_hw - Allocate a new hardware device 1240 * 1241 * This must be called once for each hardware device. The returned pointer 1242 * must be used to refer to this device when calling other functions. 1243 * mac80211 allocates a private data area for the driver pointed to by 1244 * @priv in &struct ieee80211_hw, the size of this area is given as 1245 * @priv_data_len. 1246 * 1247 * @priv_data_len: length of private data 1248 * @ops: callbacks for this device 1249 */ 1250struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1251 const struct ieee80211_ops *ops); 1252 1253/** 1254 * ieee80211_register_hw - Register hardware device 1255 * 1256 * You must call this function before any other functions in 1257 * mac80211. Note that before a hardware can be registered, you 1258 * need to fill the contained wiphy's information. 1259 * 1260 * @hw: the device to register as returned by ieee80211_alloc_hw() 1261 */ 1262int ieee80211_register_hw(struct ieee80211_hw *hw); 1263 1264#ifdef CONFIG_MAC80211_LEDS 1265extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1266extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1267extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1268extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1269#endif 1270/** 1271 * ieee80211_get_tx_led_name - get name of TX LED 1272 * 1273 * mac80211 creates a transmit LED trigger for each wireless hardware 1274 * that can be used to drive LEDs if your driver registers a LED device. 1275 * This function returns the name (or %NULL if not configured for LEDs) 1276 * of the trigger so you can automatically link the LED device. 1277 * 1278 * @hw: the hardware to get the LED trigger name for 1279 */ 1280static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1281{ 1282#ifdef CONFIG_MAC80211_LEDS 1283 return __ieee80211_get_tx_led_name(hw); 1284#else 1285 return NULL; 1286#endif 1287} 1288 1289/** 1290 * ieee80211_get_rx_led_name - get name of RX LED 1291 * 1292 * mac80211 creates a receive LED trigger for each wireless hardware 1293 * that can be used to drive LEDs if your driver registers a LED device. 1294 * This function returns the name (or %NULL if not configured for LEDs) 1295 * of the trigger so you can automatically link the LED device. 1296 * 1297 * @hw: the hardware to get the LED trigger name for 1298 */ 1299static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1300{ 1301#ifdef CONFIG_MAC80211_LEDS 1302 return __ieee80211_get_rx_led_name(hw); 1303#else 1304 return NULL; 1305#endif 1306} 1307 1308/** 1309 * ieee80211_get_assoc_led_name - get name of association LED 1310 * 1311 * mac80211 creates a association LED trigger for each wireless hardware 1312 * that can be used to drive LEDs if your driver registers a LED device. 1313 * This function returns the name (or %NULL if not configured for LEDs) 1314 * of the trigger so you can automatically link the LED device. 1315 * 1316 * @hw: the hardware to get the LED trigger name for 1317 */ 1318static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1319{ 1320#ifdef CONFIG_MAC80211_LEDS 1321 return __ieee80211_get_assoc_led_name(hw); 1322#else 1323 return NULL; 1324#endif 1325} 1326 1327/** 1328 * ieee80211_get_radio_led_name - get name of radio LED 1329 * 1330 * mac80211 creates a radio change LED trigger for each wireless hardware 1331 * that can be used to drive LEDs if your driver registers a LED device. 1332 * This function returns the name (or %NULL if not configured for LEDs) 1333 * of the trigger so you can automatically link the LED device. 1334 * 1335 * @hw: the hardware to get the LED trigger name for 1336 */ 1337static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1338{ 1339#ifdef CONFIG_MAC80211_LEDS 1340 return __ieee80211_get_radio_led_name(hw); 1341#else 1342 return NULL; 1343#endif 1344} 1345 1346/** 1347 * ieee80211_unregister_hw - Unregister a hardware device 1348 * 1349 * This function instructs mac80211 to free allocated resources 1350 * and unregister netdevices from the networking subsystem. 1351 * 1352 * @hw: the hardware to unregister 1353 */ 1354void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1355 1356/** 1357 * ieee80211_free_hw - free hardware descriptor 1358 * 1359 * This function frees everything that was allocated, including the 1360 * private data for the driver. You must call ieee80211_unregister_hw() 1361 * before calling this function. 1362 * 1363 * @hw: the hardware to free 1364 */ 1365void ieee80211_free_hw(struct ieee80211_hw *hw); 1366 1367/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1368void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1369 struct ieee80211_rx_status *status); 1370 1371/** 1372 * ieee80211_rx - receive frame 1373 * 1374 * Use this function to hand received frames to mac80211. The receive 1375 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1376 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1377 * 1378 * This function may not be called in IRQ context. Calls to this function 1379 * for a single hardware must be synchronized against each other. Calls 1380 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1381 * single hardware. 1382 * 1383 * @hw: the hardware this frame came in on 1384 * @skb: the buffer to receive, owned by mac80211 after this call 1385 * @status: status of this frame; the status pointer need not be valid 1386 * after this function returns 1387 */ 1388static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1389 struct ieee80211_rx_status *status) 1390{ 1391 __ieee80211_rx(hw, skb, status); 1392} 1393 1394/** 1395 * ieee80211_rx_irqsafe - receive frame 1396 * 1397 * Like ieee80211_rx() but can be called in IRQ context 1398 * (internally defers to a tasklet.) 1399 * 1400 * Calls to this function and ieee80211_rx() may not be mixed for a 1401 * single hardware. 1402 * 1403 * @hw: the hardware this frame came in on 1404 * @skb: the buffer to receive, owned by mac80211 after this call 1405 * @status: status of this frame; the status pointer need not be valid 1406 * after this function returns and is not freed by mac80211, 1407 * it is recommended that it points to a stack area 1408 */ 1409void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1410 struct sk_buff *skb, 1411 struct ieee80211_rx_status *status); 1412 1413/** 1414 * ieee80211_tx_status - transmit status callback 1415 * 1416 * Call this function for all transmitted frames after they have been 1417 * transmitted. It is permissible to not call this function for 1418 * multicast frames but this can affect statistics. 1419 * 1420 * This function may not be called in IRQ context. Calls to this function 1421 * for a single hardware must be synchronized against each other. Calls 1422 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1423 * for a single hardware. 1424 * 1425 * @hw: the hardware the frame was transmitted by 1426 * @skb: the frame that was transmitted, owned by mac80211 after this call 1427 */ 1428void ieee80211_tx_status(struct ieee80211_hw *hw, 1429 struct sk_buff *skb); 1430 1431/** 1432 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 1433 * 1434 * Like ieee80211_tx_status() but can be called in IRQ context 1435 * (internally defers to a tasklet.) 1436 * 1437 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1438 * single hardware. 1439 * 1440 * @hw: the hardware the frame was transmitted by 1441 * @skb: the frame that was transmitted, owned by mac80211 after this call 1442 */ 1443void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1444 struct sk_buff *skb); 1445 1446/** 1447 * ieee80211_beacon_get - beacon generation function 1448 * @hw: pointer obtained from ieee80211_alloc_hw(). 1449 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1450 * @control: will be filled with information needed to send this beacon. 1451 * 1452 * If the beacon frames are generated by the host system (i.e., not in 1453 * hardware/firmware), the low-level driver uses this function to receive 1454 * the next beacon frame from the 802.11 code. The low-level is responsible 1455 * for calling this function before beacon data is needed (e.g., based on 1456 * hardware interrupt). Returned skb is used only once and low-level driver 1457 * is responsible of freeing it. 1458 */ 1459struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1460 struct ieee80211_vif *vif); 1461 1462/** 1463 * ieee80211_rts_get - RTS frame generation function 1464 * @hw: pointer obtained from ieee80211_alloc_hw(). 1465 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1466 * @frame: pointer to the frame that is going to be protected by the RTS. 1467 * @frame_len: the frame length (in octets). 1468 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1469 * @rts: The buffer where to store the RTS frame. 1470 * 1471 * If the RTS frames are generated by the host system (i.e., not in 1472 * hardware/firmware), the low-level driver uses this function to receive 1473 * the next RTS frame from the 802.11 code. The low-level is responsible 1474 * for calling this function before and RTS frame is needed. 1475 */ 1476void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1477 const void *frame, size_t frame_len, 1478 const struct ieee80211_tx_info *frame_txctl, 1479 struct ieee80211_rts *rts); 1480 1481/** 1482 * ieee80211_rts_duration - Get the duration field for an RTS 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 RTS. 1486 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1487 * 1488 * If the RTS 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_rts_duration(struct ieee80211_hw *hw, 1493 struct ieee80211_vif *vif, size_t frame_len, 1494 const struct ieee80211_tx_info *frame_txctl); 1495 1496/** 1497 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1498 * @hw: pointer obtained from ieee80211_alloc_hw(). 1499 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1500 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1501 * @frame_len: the frame length (in octets). 1502 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1503 * @cts: The buffer where to store the CTS-to-self frame. 1504 * 1505 * If the CTS-to-self frames are generated by the host system (i.e., not in 1506 * hardware/firmware), the low-level driver uses this function to receive 1507 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1508 * for calling this function before and CTS-to-self frame is needed. 1509 */ 1510void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1511 struct ieee80211_vif *vif, 1512 const void *frame, size_t frame_len, 1513 const struct ieee80211_tx_info *frame_txctl, 1514 struct ieee80211_cts *cts); 1515 1516/** 1517 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1518 * @hw: pointer obtained from ieee80211_alloc_hw(). 1519 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1520 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1521 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1522 * 1523 * If the CTS-to-self is generated in firmware, but the host system must provide 1524 * the duration field, the low-level driver uses this function to receive 1525 * the duration field value in little-endian byteorder. 1526 */ 1527__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1528 struct ieee80211_vif *vif, 1529 size_t frame_len, 1530 const struct ieee80211_tx_info *frame_txctl); 1531 1532/** 1533 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1534 * @hw: pointer obtained from ieee80211_alloc_hw(). 1535 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1536 * @frame_len: the length of the frame. 1537 * @rate: the rate at which the frame is going to be transmitted. 1538 * 1539 * Calculate the duration field of some generic frame, given its 1540 * length and transmission rate (in 100kbps). 1541 */ 1542__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1543 struct ieee80211_vif *vif, 1544 size_t frame_len, 1545 struct ieee80211_rate *rate); 1546 1547/** 1548 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1549 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1550 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1551 * @control: will be filled with information needed to send returned frame. 1552 * 1553 * Function for accessing buffered broadcast and multicast frames. If 1554 * hardware/firmware does not implement buffering of broadcast/multicast 1555 * frames when power saving is used, 802.11 code buffers them in the host 1556 * memory. The low-level driver uses this function to fetch next buffered 1557 * frame. In most cases, this is used when generating beacon frame. This 1558 * function returns a pointer to the next buffered skb or NULL if no more 1559 * buffered frames are available. 1560 * 1561 * Note: buffered frames are returned only after DTIM beacon frame was 1562 * generated with ieee80211_beacon_get() and the low-level driver must thus 1563 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1564 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1565 * does not need to check for DTIM beacons separately and should be able to 1566 * use common code for all beacons. 1567 */ 1568struct sk_buff * 1569ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 1570 1571/** 1572 * ieee80211_get_hdrlen_from_skb - get header length from data 1573 * 1574 * Given an skb with a raw 802.11 header at the data pointer this function 1575 * returns the 802.11 header length in bytes (not including encryption 1576 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1577 * header the function returns 0. 1578 * 1579 * @skb: the frame 1580 */ 1581unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1582 1583/** 1584 * ieee80211_hdrlen - get header length in bytes from frame control 1585 * @fc: frame control field in little-endian format 1586 */ 1587unsigned int ieee80211_hdrlen(__le16 fc); 1588 1589/** 1590 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1591 * 1592 * This function computes a TKIP rc4 key for an skb. It computes 1593 * a phase 1 key if needed (iv16 wraps around). This function is to 1594 * be used by drivers which can do HW encryption but need to compute 1595 * to phase 1/2 key in SW. 1596 * 1597 * @keyconf: the parameter passed with the set key 1598 * @skb: the skb for which the key is needed 1599 * @rc4key: a buffer to which the key will be written 1600 * @type: TBD 1601 * @key: TBD 1602 */ 1603void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1604 struct sk_buff *skb, 1605 enum ieee80211_tkip_key_type type, u8 *key); 1606/** 1607 * ieee80211_wake_queue - wake specific queue 1608 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1609 * @queue: queue number (counted from zero). 1610 * 1611 * Drivers should use this function instead of netif_wake_queue. 1612 */ 1613void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1614 1615/** 1616 * ieee80211_stop_queue - stop specific queue 1617 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1618 * @queue: queue number (counted from zero). 1619 * 1620 * Drivers should use this function instead of netif_stop_queue. 1621 */ 1622void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1623 1624/** 1625 * ieee80211_queue_stopped - test status of the queue 1626 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1627 * @queue: queue number (counted from zero). 1628 * 1629 * Drivers should use this function instead of netif_stop_queue. 1630 */ 1631 1632int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 1633 1634/** 1635 * ieee80211_stop_queues - stop all queues 1636 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1637 * 1638 * Drivers should use this function instead of netif_stop_queue. 1639 */ 1640void ieee80211_stop_queues(struct ieee80211_hw *hw); 1641 1642/** 1643 * ieee80211_wake_queues - wake all queues 1644 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1645 * 1646 * Drivers should use this function instead of netif_wake_queue. 1647 */ 1648void ieee80211_wake_queues(struct ieee80211_hw *hw); 1649 1650/** 1651 * ieee80211_scan_completed - completed hardware scan 1652 * 1653 * When hardware scan offload is used (i.e. the hw_scan() callback is 1654 * assigned) this function needs to be called by the driver to notify 1655 * mac80211 that the scan finished. 1656 * 1657 * @hw: the hardware that finished the scan 1658 */ 1659void ieee80211_scan_completed(struct ieee80211_hw *hw); 1660 1661/** 1662 * ieee80211_iterate_active_interfaces - iterate active interfaces 1663 * 1664 * This function iterates over the interfaces associated with a given 1665 * hardware that are currently active and calls the callback for them. 1666 * This function allows the iterator function to sleep, when the iterator 1667 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 1668 * be used. 1669 * 1670 * @hw: the hardware struct of which the interfaces should be iterated over 1671 * @iterator: the iterator function to call 1672 * @data: first argument of the iterator function 1673 */ 1674void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1675 void (*iterator)(void *data, u8 *mac, 1676 struct ieee80211_vif *vif), 1677 void *data); 1678 1679/** 1680 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 1681 * 1682 * This function iterates over the interfaces associated with a given 1683 * hardware that are currently active and calls the callback for them. 1684 * This function requires the iterator callback function to be atomic, 1685 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 1686 * 1687 * @hw: the hardware struct of which the interfaces should be iterated over 1688 * @iterator: the iterator function to call, cannot sleep 1689 * @data: first argument of the iterator function 1690 */ 1691void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 1692 void (*iterator)(void *data, 1693 u8 *mac, 1694 struct ieee80211_vif *vif), 1695 void *data); 1696 1697/** 1698 * ieee80211_start_tx_ba_session - Start a tx 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 BA on. 1702 * @return: success if addBA request was sent, failure otherwise 1703 * 1704 * Although mac80211/low level driver/user space application can estimate 1705 * the need to start aggregation on a certain RA/TID, the session level 1706 * will be managed by the mac80211. 1707 */ 1708int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1709 1710/** 1711 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1712 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1713 * @ra: receiver address of the BA session recipient. 1714 * @tid: the TID to BA on. 1715 * 1716 * This function must be called by low level driver once it has 1717 * finished with preparations for the BA session. 1718 */ 1719void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1720 1721/** 1722 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1723 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1724 * @ra: receiver address of the BA session recipient. 1725 * @tid: the TID to BA on. 1726 * 1727 * This function must be called by low level driver once it has 1728 * finished with preparations for the BA session. 1729 * This version of the function is IRQ-safe. 1730 */ 1731void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1732 u16 tid); 1733 1734/** 1735 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1736 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1737 * @ra: receiver address of the BA session recipient 1738 * @tid: the TID to stop BA. 1739 * @initiator: if indicates initiator DELBA frame will be sent. 1740 * @return: error if no sta with matching da found, success otherwise 1741 * 1742 * Although mac80211/low level driver/user space application can estimate 1743 * the need to stop aggregation on a certain RA/TID, the session level 1744 * will be managed by the mac80211. 1745 */ 1746int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1747 u8 *ra, u16 tid, 1748 enum ieee80211_back_parties initiator); 1749 1750/** 1751 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1752 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1753 * @ra: receiver address of the BA session recipient. 1754 * @tid: the desired TID to BA on. 1755 * 1756 * This function must be called by low level driver once it has 1757 * finished with preparations for the BA session tear down. 1758 */ 1759void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1760 1761/** 1762 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1763 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1764 * @ra: receiver address of the BA session recipient. 1765 * @tid: the desired TID to BA on. 1766 * 1767 * This function must be called by low level driver once it has 1768 * finished with preparations for the BA session tear down. 1769 * This version of the function is IRQ-safe. 1770 */ 1771void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1772 u16 tid); 1773 1774/** 1775 * ieee80211_notify_mac - low level driver notification 1776 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1777 * @notif_type: enum ieee80211_notification_types 1778 * 1779 * This function must be called by low level driver to inform mac80211 of 1780 * low level driver status change or force mac80211 to re-assoc for low 1781 * level driver internal error that require re-assoc. 1782 */ 1783void ieee80211_notify_mac(struct ieee80211_hw *hw, 1784 enum ieee80211_notification_types notif_type); 1785 1786/** 1787 * ieee80211_find_sta - find a station 1788 * 1789 * @hw: pointer as obtained from ieee80211_alloc_hw() 1790 * @addr: station's address 1791 * 1792 * This function must be called under RCU lock and the 1793 * resulting pointer is only valid under RCU lock as well. 1794 */ 1795struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw, 1796 const u8 *addr); 1797 1798#endif /* MAC80211_H */ 1799