mac80211.h revision f591fa5dbbbeaebd95c9c019b3a536a327fb79de
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, -1: use default] 119 * @cw_min: minimum contention window [will be a value of the form 120 * 2^n-1 in the range 1..1023; 0: use default] 121 * @cw_max: maximum contention window [like @cw_min] 122 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 123 */ 124struct ieee80211_tx_queue_params { 125 s16 aifs; 126 u16 cw_min; 127 u16 cw_max; 128 u16 txop; 129}; 130 131/** 132 * struct ieee80211_tx_queue_stats - transmit queue statistics 133 * 134 * @len: number of packets in queue 135 * @limit: queue length limit 136 * @count: number of frames sent 137 */ 138struct ieee80211_tx_queue_stats { 139 unsigned int len; 140 unsigned int limit; 141 unsigned int count; 142}; 143 144struct ieee80211_low_level_stats { 145 unsigned int dot11ACKFailureCount; 146 unsigned int dot11RTSFailureCount; 147 unsigned int dot11FCSErrorCount; 148 unsigned int dot11RTSSuccessCount; 149}; 150 151/** 152 * enum ieee80211_bss_change - BSS change notification flags 153 * 154 * These flags are used with the bss_info_changed() callback 155 * to indicate which BSS parameter changed. 156 * 157 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 158 * also implies a change in the AID. 159 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 160 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 161 * @BSS_CHANGED_HT: 802.11n parameters changed 162 */ 163enum ieee80211_bss_change { 164 BSS_CHANGED_ASSOC = 1<<0, 165 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 166 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 167 BSS_CHANGED_HT = 1<<4, 168}; 169 170/** 171 * struct ieee80211_bss_conf - holds the BSS's changing parameters 172 * 173 * This structure keeps information about a BSS (and an association 174 * to that BSS) that can change during the lifetime of the BSS. 175 * 176 * @assoc: association status 177 * @aid: association ID number, valid only when @assoc is true 178 * @use_cts_prot: use CTS protection 179 * @use_short_preamble: use 802.11b short preamble 180 * @timestamp: beacon timestamp 181 * @beacon_int: beacon interval 182 * @assoc_capability: capabbilities taken from assoc resp 183 * @assoc_ht: association in HT mode 184 * @ht_conf: ht capabilities 185 * @ht_bss_conf: ht extended capabilities 186 */ 187struct ieee80211_bss_conf { 188 /* association related data */ 189 bool assoc; 190 u16 aid; 191 /* erp related data */ 192 bool use_cts_prot; 193 bool use_short_preamble; 194 u16 beacon_int; 195 u16 assoc_capability; 196 u64 timestamp; 197 /* ht related data */ 198 bool assoc_ht; 199 struct ieee80211_ht_info *ht_conf; 200 struct ieee80211_ht_bss_info *ht_bss_conf; 201}; 202 203/** 204 * enum mac80211_tx_control_flags - flags to describe 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: TBD 216 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 217 * station 218 * @IEEE80211_TX_CTL_REQUEUE: TBD 219 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 220 * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD 221 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the 222 * through set_retry_limit configured long retry value 223 * @IEEE80211_TX_CTL_EAPOL_FRAME: internal to mac80211 224 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 225 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 226 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 227 * of streams when this flag is on can be extracted from antenna_sel_tx, 228 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n 229 * antennas marked use MIMO_n. 230 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame 231 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 232 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 233 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval 234 * @IEEE80211_TX_CTL_INJECTED: TBD 235 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 236 * because the destination STA was in powersave mode. 237 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 238 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 239 * is for the whole aggregation. 240 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 241 * so consider using block ack request (BAR). 242 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 243 * number to this frame, taking care of not overwriting the fragment 244 * number and increasing the sequence number only when the 245 * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly 246 * assign sequence numbers to QoS-data frames but cannot do so correctly 247 * for non-QoS-data and management frames because beacons need them from 248 * that counter as well and mac80211 cannot guarantee proper sequencing. 249 * If this flag is set, the driver should instruct the hardware to 250 * assign a sequence number to the frame or assign one itself. Cf. IEEE 251 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 252 * beacons always be clear for frames without a sequence number field. 253 */ 254enum mac80211_tx_control_flags { 255 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 256 IEEE80211_TX_CTL_DO_NOT_ENCRYPT = BIT(1), 257 IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2), 258 IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3), 259 IEEE80211_TX_CTL_NO_ACK = BIT(4), 260 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5), 261 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6), 262 IEEE80211_TX_CTL_REQUEUE = BIT(7), 263 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8), 264 IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9), 265 IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10), 266 IEEE80211_TX_CTL_EAPOL_FRAME = BIT(11), 267 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12), 268 IEEE80211_TX_CTL_AMPDU = BIT(13), 269 IEEE80211_TX_CTL_OFDM_HT = BIT(14), 270 IEEE80211_TX_CTL_GREEN_FIELD = BIT(15), 271 IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16), 272 IEEE80211_TX_CTL_DUP_DATA = BIT(17), 273 IEEE80211_TX_CTL_SHORT_GI = BIT(18), 274 IEEE80211_TX_CTL_INJECTED = BIT(19), 275 IEEE80211_TX_STAT_TX_FILTERED = BIT(20), 276 IEEE80211_TX_STAT_ACK = BIT(21), 277 IEEE80211_TX_STAT_AMPDU = BIT(22), 278 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23), 279 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24), 280}; 281 282 283#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \ 284 (sizeof(((struct sk_buff *)0)->cb) - 8) 285#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \ 286 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)) 287 288/** 289 * struct ieee80211_tx_info - skb transmit information 290 * 291 * This structure is placed in skb->cb for three uses: 292 * (1) mac80211 TX control - mac80211 tells the driver what to do 293 * (2) driver internal use (if applicable) 294 * (3) TX status information - driver tells mac80211 what happened 295 * 296 * @flags: transmit info flags, defined above 297 * @band: TBD 298 * @tx_rate_idx: TBD 299 * @antenna_sel_tx: TBD 300 * @control: union for control data 301 * @status: union for status data 302 * @driver_data: array of driver_data pointers 303 * @retry_count: number of retries 304 * @excessive_retries: set to 1 if the frame was retried many times 305 * but not acknowledged 306 * @ampdu_ack_len: number of aggregated frames. 307 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 308 * @ampdu_ack_map: block ack bit map for the aggregation. 309 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 310 * @ack_signal: signal strength of the ACK frame 311 */ 312struct ieee80211_tx_info { 313 /* common information */ 314 u32 flags; 315 u8 band; 316 s8 tx_rate_idx; 317 u8 antenna_sel_tx; 318 319 /* 1 byte hole */ 320 321 union { 322 struct { 323 struct ieee80211_vif *vif; 324 struct ieee80211_key_conf *hw_key; 325 unsigned long jiffies; 326 int ifindex; 327 u16 aid; 328 s8 rts_cts_rate_idx, alt_retry_rate_idx; 329 u8 retry_limit; 330 u8 icv_len; 331 u8 iv_len; 332 } control; 333 struct { 334 u64 ampdu_ack_map; 335 int ack_signal; 336 u8 retry_count; 337 bool excessive_retries; 338 u8 ampdu_ack_len; 339 } status; 340 void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS]; 341 }; 342}; 343 344static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 345{ 346 return (struct ieee80211_tx_info *)skb->cb; 347} 348 349 350/** 351 * enum mac80211_rx_flags - receive flags 352 * 353 * These flags are used with the @flag member of &struct ieee80211_rx_status. 354 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 355 * Use together with %RX_FLAG_MMIC_STRIPPED. 356 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 357 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 358 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 359 * verification has been done by the hardware. 360 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 361 * If this flag is set, the stack cannot do any replay detection 362 * hence the driver or hardware will have to do that. 363 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 364 * the frame. 365 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 366 * the frame. 367 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 368 * is valid. This is useful in monitor mode and necessary for beacon frames 369 * to enable IBSS merging. 370 */ 371enum mac80211_rx_flags { 372 RX_FLAG_MMIC_ERROR = 1<<0, 373 RX_FLAG_DECRYPTED = 1<<1, 374 RX_FLAG_RADIOTAP = 1<<2, 375 RX_FLAG_MMIC_STRIPPED = 1<<3, 376 RX_FLAG_IV_STRIPPED = 1<<4, 377 RX_FLAG_FAILED_FCS_CRC = 1<<5, 378 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 379 RX_FLAG_TSFT = 1<<7, 380}; 381 382/** 383 * struct ieee80211_rx_status - receive status 384 * 385 * The low-level driver should provide this information (the subset 386 * supported by hardware) to the 802.11 code with each received 387 * frame. 388 * 389 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 390 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 391 * @band: the active band when this frame was received 392 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 393 * @signal: signal strength when receiving this frame, either in dBm, in dB or 394 * unspecified depending on the hardware capabilities flags 395 * @IEEE80211_HW_SIGNAL_* 396 * @noise: noise when receiving this frame, in dBm. 397 * @qual: overall signal quality indication, in percent (0-100). 398 * @antenna: antenna used 399 * @rate_idx: index of data rate into band's supported rates 400 * @flag: %RX_FLAG_* 401 */ 402struct ieee80211_rx_status { 403 u64 mactime; 404 enum ieee80211_band band; 405 int freq; 406 int signal; 407 int noise; 408 int qual; 409 int antenna; 410 int rate_idx; 411 int flag; 412}; 413 414/** 415 * enum ieee80211_conf_flags - configuration flags 416 * 417 * Flags to define PHY configuration options 418 * 419 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 420 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 421 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 422 * @IEEE80211_CONF_PS: Enable 802.11 power save mode 423 */ 424enum ieee80211_conf_flags { 425 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 426 IEEE80211_CONF_RADIOTAP = (1<<1), 427 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 428 IEEE80211_CONF_PS = (1<<3), 429}; 430 431/** 432 * struct ieee80211_conf - configuration of the device 433 * 434 * This struct indicates how the driver shall configure the hardware. 435 * 436 * @radio_enabled: when zero, driver is required to switch off the radio. 437 * TODO make a flag 438 * @beacon_int: beacon interval (TODO make interface config) 439 * @flags: configuration flags defined above 440 * @power_level: requested transmit power (in dBm) 441 * @max_antenna_gain: maximum antenna gain (in dBi) 442 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 443 * 1/2: antenna 0/1 444 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 445 * @ht_conf: describes current self configuration of 802.11n HT capabilies 446 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 447 * @channel: the channel to tune to 448 */ 449struct ieee80211_conf { 450 int radio_enabled; 451 452 int beacon_int; 453 u32 flags; 454 int power_level; 455 int max_antenna_gain; 456 u8 antenna_sel_tx; 457 u8 antenna_sel_rx; 458 459 struct ieee80211_channel *channel; 460 461 struct ieee80211_ht_info ht_conf; 462 struct ieee80211_ht_bss_info ht_bss_conf; 463}; 464 465/** 466 * enum ieee80211_if_types - types of 802.11 network interfaces 467 * 468 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 469 * by mac80211 itself 470 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 471 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 472 * daemon. Drivers should never see this type. 473 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 474 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 475 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 476 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 477 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 478 * will never see this type. 479 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 480 */ 481enum ieee80211_if_types { 482 IEEE80211_IF_TYPE_INVALID, 483 IEEE80211_IF_TYPE_AP, 484 IEEE80211_IF_TYPE_STA, 485 IEEE80211_IF_TYPE_IBSS, 486 IEEE80211_IF_TYPE_MESH_POINT, 487 IEEE80211_IF_TYPE_MNTR, 488 IEEE80211_IF_TYPE_WDS, 489 IEEE80211_IF_TYPE_VLAN, 490}; 491 492/** 493 * struct ieee80211_vif - per-interface data 494 * 495 * Data in this structure is continually present for driver 496 * use during the life of a virtual interface. 497 * 498 * @type: type of this virtual interface 499 * @drv_priv: data area for driver use, will always be aligned to 500 * sizeof(void *). 501 */ 502struct ieee80211_vif { 503 enum ieee80211_if_types type; 504 /* must be last */ 505 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 506}; 507 508static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 509{ 510#ifdef CONFIG_MAC80211_MESH 511 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 512#endif 513 return false; 514} 515 516/** 517 * struct ieee80211_if_init_conf - initial configuration of an interface 518 * 519 * @vif: pointer to a driver-use per-interface structure. The pointer 520 * itself is also used for various functions including 521 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 522 * @type: one of &enum ieee80211_if_types constants. Determines the type of 523 * added/removed interface. 524 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 525 * until the interface is removed (i.e. it cannot be used after 526 * remove_interface() callback was called for this interface). 527 * 528 * This structure is used in add_interface() and remove_interface() 529 * callbacks of &struct ieee80211_hw. 530 * 531 * When you allow multiple interfaces to be added to your PHY, take care 532 * that the hardware can actually handle multiple MAC addresses. However, 533 * also take care that when there's no interface left with mac_addr != %NULL 534 * you remove the MAC address from the device to avoid acknowledging packets 535 * in pure monitor mode. 536 */ 537struct ieee80211_if_init_conf { 538 enum ieee80211_if_types type; 539 struct ieee80211_vif *vif; 540 void *mac_addr; 541}; 542 543/** 544 * enum ieee80211_if_conf_change - interface config change flags 545 * 546 * @IEEE80211_IFCC_BSSID: The BSSID changed. 547 * @IEEE80211_IFCC_SSID: The SSID changed. 548 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed 549 * (currently AP and MESH only), use ieee80211_beacon_get(). 550 */ 551enum ieee80211_if_conf_change { 552 IEEE80211_IFCC_BSSID = BIT(0), 553 IEEE80211_IFCC_SSID = BIT(1), 554 IEEE80211_IFCC_BEACON = BIT(2), 555}; 556 557/** 558 * struct ieee80211_if_conf - configuration of an interface 559 * 560 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change. 561 * @bssid: BSSID of the network we are associated to/creating. 562 * @ssid: used (together with @ssid_len) by drivers for hardware that 563 * generate beacons independently. The pointer is valid only during the 564 * config_interface() call, so copy the value somewhere if you need 565 * it. 566 * @ssid_len: length of the @ssid field. 567 * 568 * This structure is passed to the config_interface() callback of 569 * &struct ieee80211_hw. 570 */ 571struct ieee80211_if_conf { 572 u32 changed; 573 u8 *bssid; 574 u8 *ssid; 575 size_t ssid_len; 576}; 577 578/** 579 * enum ieee80211_key_alg - key algorithm 580 * @ALG_WEP: WEP40 or WEP104 581 * @ALG_TKIP: TKIP 582 * @ALG_CCMP: CCMP (AES) 583 */ 584enum ieee80211_key_alg { 585 ALG_WEP, 586 ALG_TKIP, 587 ALG_CCMP, 588}; 589 590/** 591 * enum ieee80211_key_len - key length 592 * @LEN_WEP40: WEP 5-byte long key 593 * @LEN_WEP104: WEP 13-byte long key 594 */ 595enum ieee80211_key_len { 596 LEN_WEP40 = 5, 597 LEN_WEP104 = 13, 598}; 599 600/** 601 * enum ieee80211_key_flags - key flags 602 * 603 * These flags are used for communication about keys between the driver 604 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 605 * 606 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 607 * that the STA this key will be used with could be using QoS. 608 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 609 * driver to indicate that it requires IV generation for this 610 * particular key. 611 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 612 * the driver for a TKIP key if it requires Michael MIC 613 * generation in software. 614 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 615 * that the key is pairwise rather then a shared key. 616 */ 617enum ieee80211_key_flags { 618 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 619 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 620 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 621 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 622}; 623 624/** 625 * struct ieee80211_key_conf - key information 626 * 627 * This key information is given by mac80211 to the driver by 628 * the set_key() callback in &struct ieee80211_ops. 629 * 630 * @hw_key_idx: To be set by the driver, this is the key index the driver 631 * wants to be given when a frame is transmitted and needs to be 632 * encrypted in hardware. 633 * @alg: The key algorithm. 634 * @flags: key flags, see &enum ieee80211_key_flags. 635 * @keyidx: the key index (0-3) 636 * @keylen: key material length 637 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 638 * data block: 639 * - Temporal Encryption Key (128 bits) 640 * - Temporal Authenticator Tx MIC Key (64 bits) 641 * - Temporal Authenticator Rx MIC Key (64 bits) 642 * 643 */ 644struct ieee80211_key_conf { 645 enum ieee80211_key_alg alg; 646 u8 hw_key_idx; 647 u8 flags; 648 s8 keyidx; 649 u8 keylen; 650 u8 key[0]; 651}; 652 653/** 654 * enum set_key_cmd - key command 655 * 656 * Used with the set_key() callback in &struct ieee80211_ops, this 657 * indicates whether a key is being removed or added. 658 * 659 * @SET_KEY: a key is set 660 * @DISABLE_KEY: a key must be disabled 661 */ 662enum set_key_cmd { 663 SET_KEY, DISABLE_KEY, 664}; 665 666/** 667 * enum sta_notify_cmd - sta notify command 668 * 669 * Used with the sta_notify() callback in &struct ieee80211_ops, this 670 * indicates addition and removal of a station to station table. 671 * 672 * @STA_NOTIFY_ADD: a station was added to the station table 673 * @STA_NOTIFY_REMOVE: a station being removed from the station table 674 */ 675enum sta_notify_cmd { 676 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 677}; 678 679/** 680 * enum ieee80211_tkip_key_type - get tkip key 681 * 682 * Used by drivers which need to get a tkip key for skb. Some drivers need a 683 * phase 1 key, others need a phase 2 key. A single function allows the driver 684 * to get the key, this enum indicates what type of key is required. 685 * 686 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 687 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 688 */ 689enum ieee80211_tkip_key_type { 690 IEEE80211_TKIP_P1_KEY, 691 IEEE80211_TKIP_P2_KEY, 692}; 693 694/** 695 * enum ieee80211_hw_flags - hardware flags 696 * 697 * These flags are used to indicate hardware capabilities to 698 * the stack. Generally, flags here should have their meaning 699 * done in a way that the simplest hardware doesn't need setting 700 * any particular flags. There are some exceptions to this rule, 701 * however, so you are advised to review these flags carefully. 702 * 703 * @IEEE80211_HW_RX_INCLUDES_FCS: 704 * Indicates that received frames passed to the stack include 705 * the FCS at the end. 706 * 707 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 708 * Some wireless LAN chipsets buffer broadcast/multicast frames 709 * for power saving stations in the hardware/firmware and others 710 * rely on the host system for such buffering. This option is used 711 * to configure the IEEE 802.11 upper layer to buffer broadcast and 712 * multicast frames when there are power saving stations so that 713 * the driver can fetch them with ieee80211_get_buffered_bc(). Note 714 * that not setting this flag works properly only when the 715 * %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is also not set because 716 * otherwise the stack will not know when the DTIM beacon was sent. 717 * 718 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 719 * Hardware is not capable of short slot operation on the 2.4 GHz band. 720 * 721 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 722 * Hardware is not capable of receiving frames with short preamble on 723 * the 2.4 GHz band. 724 * 725 * @IEEE80211_HW_SIGNAL_UNSPEC: 726 * Hardware can provide signal values but we don't know its units. We 727 * expect values between 0 and @max_signal. 728 * If possible please provide dB or dBm instead. 729 * 730 * @IEEE80211_HW_SIGNAL_DB: 731 * Hardware gives signal values in dB, decibel difference from an 732 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 733 * If possible please provide dBm instead. 734 * 735 * @IEEE80211_HW_SIGNAL_DBM: 736 * Hardware gives signal values in dBm, decibel difference from 737 * one milliwatt. This is the preferred method since it is standardized 738 * between different devices. @max_signal does not need to be set. 739 * 740 * @IEEE80211_HW_NOISE_DBM: 741 * Hardware can provide noise (radio interference) values in units dBm, 742 * decibel difference from one milliwatt. 743 * 744 * @IEEE80211_HW_SPECTRUM_MGMT: 745 * Hardware supports spectrum management defined in 802.11h 746 * Measurement, Channel Switch, Quieting, TPC 747 */ 748enum ieee80211_hw_flags { 749 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 750 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 751 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 752 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 753 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 754 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 755 IEEE80211_HW_SIGNAL_DB = 1<<6, 756 IEEE80211_HW_SIGNAL_DBM = 1<<7, 757 IEEE80211_HW_NOISE_DBM = 1<<8, 758 IEEE80211_HW_SPECTRUM_MGMT = 1<<9, 759}; 760 761/** 762 * struct ieee80211_hw - hardware information and state 763 * 764 * This structure contains the configuration and hardware 765 * information for an 802.11 PHY. 766 * 767 * @wiphy: This points to the &struct wiphy allocated for this 768 * 802.11 PHY. You must fill in the @perm_addr and @dev 769 * members of this structure using SET_IEEE80211_DEV() 770 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 771 * bands (with channels, bitrates) are registered here. 772 * 773 * @conf: &struct ieee80211_conf, device configuration, don't use. 774 * 775 * @workqueue: single threaded workqueue available for driver use, 776 * allocated by mac80211 on registration and flushed when an 777 * interface is removed. 778 * NOTICE: All work performed on this workqueue should NEVER 779 * acquire the RTNL lock (i.e. Don't use the function 780 * ieee80211_iterate_active_interfaces()) 781 * 782 * @priv: pointer to private area that was allocated for driver use 783 * along with this structure. 784 * 785 * @flags: hardware flags, see &enum ieee80211_hw_flags. 786 * 787 * @extra_tx_headroom: headroom to reserve in each transmit skb 788 * for use by the driver (e.g. for transmit headers.) 789 * 790 * @channel_change_time: time (in microseconds) it takes to change channels. 791 * 792 * @max_signal: Maximum value for signal (rssi) in RX information, used 793 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 794 * 795 * @queues: number of available hardware transmit queues for 796 * data packets. WMM/QoS requires at least four, these 797 * queues need to have configurable access parameters. 798 * 799 * @ampdu_queues: number of available hardware transmit queues 800 * for A-MPDU packets, these have no access parameters 801 * because they're used only for A-MPDU frames. Note that 802 * mac80211 will not currently use any of the regular queues 803 * for aggregation. 804 * 805 * @rate_control_algorithm: rate control algorithm for this hardware. 806 * If unset (NULL), the default algorithm will be used. Must be 807 * set before calling ieee80211_register_hw(). 808 * 809 * @vif_data_size: size (in bytes) of the drv_priv data area 810 * within &struct ieee80211_vif. 811 */ 812struct ieee80211_hw { 813 struct ieee80211_conf conf; 814 struct wiphy *wiphy; 815 struct workqueue_struct *workqueue; 816 const char *rate_control_algorithm; 817 void *priv; 818 u32 flags; 819 unsigned int extra_tx_headroom; 820 int channel_change_time; 821 int vif_data_size; 822 u16 queues, ampdu_queues; 823 s8 max_signal; 824}; 825 826/** 827 * SET_IEEE80211_DEV - set device for 802.11 hardware 828 * 829 * @hw: the &struct ieee80211_hw to set the device for 830 * @dev: the &struct device of this 802.11 device 831 */ 832static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 833{ 834 set_wiphy_dev(hw->wiphy, dev); 835} 836 837/** 838 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 839 * 840 * @hw: the &struct ieee80211_hw to set the MAC address for 841 * @addr: the address to set 842 */ 843static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 844{ 845 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 846} 847 848static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw) 849{ 850#ifdef CONFIG_MAC80211_QOS 851 return hw->queues; 852#else 853 return 1; 854#endif 855} 856 857static inline int ieee80211_num_queues(struct ieee80211_hw *hw) 858{ 859#ifdef CONFIG_MAC80211_QOS 860 return hw->queues + hw->ampdu_queues; 861#else 862 return 1; 863#endif 864} 865 866static inline struct ieee80211_rate * 867ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 868 const struct ieee80211_tx_info *c) 869{ 870 if (WARN_ON(c->tx_rate_idx < 0)) 871 return NULL; 872 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 873} 874 875static inline struct ieee80211_rate * 876ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 877 const struct ieee80211_tx_info *c) 878{ 879 if (c->control.rts_cts_rate_idx < 0) 880 return NULL; 881 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 882} 883 884static inline struct ieee80211_rate * 885ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 886 const struct ieee80211_tx_info *c) 887{ 888 if (c->control.alt_retry_rate_idx < 0) 889 return NULL; 890 return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx]; 891} 892 893/** 894 * DOC: Hardware crypto acceleration 895 * 896 * mac80211 is capable of taking advantage of many hardware 897 * acceleration designs for encryption and decryption operations. 898 * 899 * The set_key() callback in the &struct ieee80211_ops for a given 900 * device is called to enable hardware acceleration of encryption and 901 * decryption. The callback takes an @address parameter that will be 902 * the broadcast address for default keys, the other station's hardware 903 * address for individual keys or the zero address for keys that will 904 * be used only for transmission. 905 * Multiple transmission keys with the same key index may be used when 906 * VLANs are configured for an access point. 907 * 908 * The @local_address parameter will always be set to our own address, 909 * this is only relevant if you support multiple local addresses. 910 * 911 * When transmitting, the TX control data will use the @hw_key_idx 912 * selected by the driver by modifying the &struct ieee80211_key_conf 913 * pointed to by the @key parameter to the set_key() function. 914 * 915 * The set_key() call for the %SET_KEY command should return 0 if 916 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 917 * added; if you return 0 then hw_key_idx must be assigned to the 918 * hardware key index, you are free to use the full u8 range. 919 * 920 * When the cmd is %DISABLE_KEY then it must succeed. 921 * 922 * Note that it is permissible to not decrypt a frame even if a key 923 * for it has been uploaded to hardware, the stack will not make any 924 * decision based on whether a key has been uploaded or not but rather 925 * based on the receive flags. 926 * 927 * The &struct ieee80211_key_conf structure pointed to by the @key 928 * parameter is guaranteed to be valid until another call to set_key() 929 * removes it, but it can only be used as a cookie to differentiate 930 * keys. 931 * 932 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 933 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 934 * handler. 935 * The update_tkip_key() call updates the driver with the new phase 1 key. 936 * This happens everytime the iv16 wraps around (every 65536 packets). The 937 * set_key() call will happen only once for each key (unless the AP did 938 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 939 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 940 * handler is software decryption with wrap around of iv16. 941 */ 942 943/** 944 * DOC: Frame filtering 945 * 946 * mac80211 requires to see many management frames for proper 947 * operation, and users may want to see many more frames when 948 * in monitor mode. However, for best CPU usage and power consumption, 949 * having as few frames as possible percolate through the stack is 950 * desirable. Hence, the hardware should filter as much as possible. 951 * 952 * To achieve this, mac80211 uses filter flags (see below) to tell 953 * the driver's configure_filter() function which frames should be 954 * passed to mac80211 and which should be filtered out. 955 * 956 * The configure_filter() callback is invoked with the parameters 957 * @mc_count and @mc_list for the combined multicast address list 958 * of all virtual interfaces, @changed_flags telling which flags 959 * were changed and @total_flags with the new flag states. 960 * 961 * If your device has no multicast address filters your driver will 962 * need to check both the %FIF_ALLMULTI flag and the @mc_count 963 * parameter to see whether multicast frames should be accepted 964 * or dropped. 965 * 966 * All unsupported flags in @total_flags must be cleared. 967 * Hardware does not support a flag if it is incapable of _passing_ 968 * the frame to the stack. Otherwise the driver must ignore 969 * the flag, but not clear it. 970 * You must _only_ clear the flag (announce no support for the 971 * flag to mac80211) if you are not able to pass the packet type 972 * to the stack (so the hardware always filters it). 973 * So for example, you should clear @FIF_CONTROL, if your hardware 974 * always filters control frames. If your hardware always passes 975 * control frames to the kernel and is incapable of filtering them, 976 * you do _not_ clear the @FIF_CONTROL flag. 977 * This rule applies to all other FIF flags as well. 978 */ 979 980/** 981 * enum ieee80211_filter_flags - hardware filter flags 982 * 983 * These flags determine what the filter in hardware should be 984 * programmed to let through and what should not be passed to the 985 * stack. It is always safe to pass more frames than requested, 986 * but this has negative impact on power consumption. 987 * 988 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 989 * think of the BSS as your network segment and then this corresponds 990 * to the regular ethernet device promiscuous mode. 991 * 992 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 993 * by the user or if the hardware is not capable of filtering by 994 * multicast address. 995 * 996 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 997 * %RX_FLAG_FAILED_FCS_CRC for them) 998 * 999 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1000 * the %RX_FLAG_FAILED_PLCP_CRC for them 1001 * 1002 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1003 * to the hardware that it should not filter beacons or probe responses 1004 * by BSSID. Filtering them can greatly reduce the amount of processing 1005 * mac80211 needs to do and the amount of CPU wakeups, so you should 1006 * honour this flag if possible. 1007 * 1008 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 1009 * only those addressed to this station 1010 * 1011 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1012 */ 1013enum ieee80211_filter_flags { 1014 FIF_PROMISC_IN_BSS = 1<<0, 1015 FIF_ALLMULTI = 1<<1, 1016 FIF_FCSFAIL = 1<<2, 1017 FIF_PLCPFAIL = 1<<3, 1018 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1019 FIF_CONTROL = 1<<5, 1020 FIF_OTHER_BSS = 1<<6, 1021}; 1022 1023/** 1024 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1025 * 1026 * These flags are used with the ampdu_action() callback in 1027 * &struct ieee80211_ops to indicate which action is needed. 1028 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1029 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1030 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1031 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1032 */ 1033enum ieee80211_ampdu_mlme_action { 1034 IEEE80211_AMPDU_RX_START, 1035 IEEE80211_AMPDU_RX_STOP, 1036 IEEE80211_AMPDU_TX_START, 1037 IEEE80211_AMPDU_TX_STOP, 1038}; 1039 1040/** 1041 * struct ieee80211_ops - callbacks from mac80211 to the driver 1042 * 1043 * This structure contains various callbacks that the driver may 1044 * handle or, in some cases, must handle, for example to configure 1045 * the hardware to a new channel or to transmit a frame. 1046 * 1047 * @tx: Handler that 802.11 module calls for each transmitted frame. 1048 * skb contains the buffer starting from the IEEE 802.11 header. 1049 * The low-level driver should send the frame out based on 1050 * configuration in the TX control data. This handler should, 1051 * preferably, never fail and stop queues appropriately, more 1052 * importantly, however, it must never fail for A-MPDU-queues. 1053 * Must be implemented and atomic. 1054 * 1055 * @start: Called before the first netdevice attached to the hardware 1056 * is enabled. This should turn on the hardware and must turn on 1057 * frame reception (for possibly enabled monitor interfaces.) 1058 * Returns negative error codes, these may be seen in userspace, 1059 * or zero. 1060 * When the device is started it should not have a MAC address 1061 * to avoid acknowledging frames before a non-monitor device 1062 * is added. 1063 * Must be implemented. 1064 * 1065 * @stop: Called after last netdevice attached to the hardware 1066 * is disabled. This should turn off the hardware (at least 1067 * it must turn off frame reception.) 1068 * May be called right after add_interface if that rejects 1069 * an interface. 1070 * Must be implemented. 1071 * 1072 * @add_interface: Called when a netdevice attached to the hardware is 1073 * enabled. Because it is not called for monitor mode devices, @open 1074 * and @stop must be implemented. 1075 * The driver should perform any initialization it needs before 1076 * the device can be enabled. The initial configuration for the 1077 * interface is given in the conf parameter. 1078 * The callback may refuse to add an interface by returning a 1079 * negative error code (which will be seen in userspace.) 1080 * Must be implemented. 1081 * 1082 * @remove_interface: Notifies a driver that an interface is going down. 1083 * The @stop callback is called after this if it is the last interface 1084 * and no monitor interfaces are present. 1085 * When all interfaces are removed, the MAC address in the hardware 1086 * must be cleared so the device no longer acknowledges packets, 1087 * the mac_addr member of the conf structure is, however, set to the 1088 * MAC address of the device going away. 1089 * Hence, this callback must be implemented. 1090 * 1091 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1092 * function to change hardware configuration, e.g., channel. 1093 * 1094 * @config_interface: Handler for configuration requests related to interfaces 1095 * (e.g. BSSID changes.) 1096 * 1097 * @bss_info_changed: Handler for configuration requests related to BSS 1098 * parameters that may vary during BSS's lifespan, and may affect low 1099 * level driver (e.g. assoc/disassoc status, erp parameters). 1100 * This function should not be used if no BSS has been set, unless 1101 * for association indication. The @changed parameter indicates which 1102 * of the bss parameters has changed when a call is made. 1103 * 1104 * @configure_filter: Configure the device's RX filter. 1105 * See the section "Frame filtering" for more information. 1106 * This callback must be implemented and atomic. 1107 * 1108 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon 1109 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set) 1110 * mac80211 calls this function when a TIM bit must be set or cleared 1111 * for a given AID. Must be atomic. 1112 * 1113 * @set_key: See the section "Hardware crypto acceleration" 1114 * This callback can sleep, and is only called between add_interface 1115 * and remove_interface calls, i.e. while the interface with the 1116 * given local_address is enabled. 1117 * 1118 * @update_tkip_key: See the section "Hardware crypto acceleration" 1119 * This callback will be called in the context of Rx. Called for drivers 1120 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1121 * 1122 * @hw_scan: Ask the hardware to service the scan request, no need to start 1123 * the scan state machine in stack. The scan must honour the channel 1124 * configuration done by the regulatory agent in the wiphy's registered 1125 * bands. 1126 * 1127 * @get_stats: return low-level statistics 1128 * 1129 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1130 * callback should be provided to read the TKIP transmit IVs (both IV32 1131 * and IV16) for the given key from hardware. 1132 * 1133 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1134 * 1135 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1136 * the device does fragmentation by itself; if this method is assigned then 1137 * the stack will not do fragmentation. 1138 * 1139 * @set_retry_limit: Configuration of retry limits (if device needs it) 1140 * 1141 * @sta_notify: Notifies low level driver about addition or removal 1142 * of assocaited station or AP. 1143 * 1144 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1145 * bursting) for a hardware TX queue. Must be atomic. 1146 * 1147 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1148 * to get number of currently queued packets (queue length), maximum queue 1149 * size (limit), and total number of packets sent using each TX queue 1150 * (count). The 'stats' pointer points to an array that has hw->queues + 1151 * hw->ampdu_queues items. 1152 * 1153 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1154 * this is only used for IBSS mode debugging and, as such, is not a 1155 * required function. Must be atomic. 1156 * 1157 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1158 * with other STAs in the IBSS. This is only used in IBSS mode. This 1159 * function is optional if the firmware/hardware takes full care of 1160 * TSF synchronization. 1161 * 1162 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1163 * This is needed only for IBSS mode and the result of this function is 1164 * used to determine whether to reply to Probe Requests. 1165 * 1166 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1167 * 1168 * @ampdu_action: Perform a certain A-MPDU action 1169 * The RA/TID combination determines the destination and TID we want 1170 * the ampdu action to be performed for. The action is defined through 1171 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1172 * is the first frame we expect to perform the action on. notice 1173 * that TX/RX_STOP can pass NULL for this parameter. 1174 */ 1175struct ieee80211_ops { 1176 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1177 int (*start)(struct ieee80211_hw *hw); 1178 void (*stop)(struct ieee80211_hw *hw); 1179 int (*add_interface)(struct ieee80211_hw *hw, 1180 struct ieee80211_if_init_conf *conf); 1181 void (*remove_interface)(struct ieee80211_hw *hw, 1182 struct ieee80211_if_init_conf *conf); 1183 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1184 int (*config_interface)(struct ieee80211_hw *hw, 1185 struct ieee80211_vif *vif, 1186 struct ieee80211_if_conf *conf); 1187 void (*bss_info_changed)(struct ieee80211_hw *hw, 1188 struct ieee80211_vif *vif, 1189 struct ieee80211_bss_conf *info, 1190 u32 changed); 1191 void (*configure_filter)(struct ieee80211_hw *hw, 1192 unsigned int changed_flags, 1193 unsigned int *total_flags, 1194 int mc_count, struct dev_addr_list *mc_list); 1195 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1196 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1197 const u8 *local_address, const u8 *address, 1198 struct ieee80211_key_conf *key); 1199 void (*update_tkip_key)(struct ieee80211_hw *hw, 1200 struct ieee80211_key_conf *conf, const u8 *address, 1201 u32 iv32, u16 *phase1key); 1202 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1203 int (*get_stats)(struct ieee80211_hw *hw, 1204 struct ieee80211_low_level_stats *stats); 1205 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1206 u32 *iv32, u16 *iv16); 1207 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1208 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1209 int (*set_retry_limit)(struct ieee80211_hw *hw, 1210 u32 short_retry, u32 long_retr); 1211 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1212 enum sta_notify_cmd, const u8 *addr); 1213 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1214 const struct ieee80211_tx_queue_params *params); 1215 int (*get_tx_stats)(struct ieee80211_hw *hw, 1216 struct ieee80211_tx_queue_stats *stats); 1217 u64 (*get_tsf)(struct ieee80211_hw *hw); 1218 void (*reset_tsf)(struct ieee80211_hw *hw); 1219 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1220 int (*ampdu_action)(struct ieee80211_hw *hw, 1221 enum ieee80211_ampdu_mlme_action action, 1222 const u8 *addr, u16 tid, u16 *ssn); 1223}; 1224 1225/** 1226 * ieee80211_alloc_hw - Allocate a new hardware device 1227 * 1228 * This must be called once for each hardware device. The returned pointer 1229 * must be used to refer to this device when calling other functions. 1230 * mac80211 allocates a private data area for the driver pointed to by 1231 * @priv in &struct ieee80211_hw, the size of this area is given as 1232 * @priv_data_len. 1233 * 1234 * @priv_data_len: length of private data 1235 * @ops: callbacks for this device 1236 */ 1237struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1238 const struct ieee80211_ops *ops); 1239 1240/** 1241 * ieee80211_register_hw - Register hardware device 1242 * 1243 * You must call this function before any other functions in 1244 * mac80211. Note that before a hardware can be registered, you 1245 * need to fill the contained wiphy's information. 1246 * 1247 * @hw: the device to register as returned by ieee80211_alloc_hw() 1248 */ 1249int ieee80211_register_hw(struct ieee80211_hw *hw); 1250 1251#ifdef CONFIG_MAC80211_LEDS 1252extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1253extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1254extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1255extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1256#endif 1257/** 1258 * ieee80211_get_tx_led_name - get name of TX LED 1259 * 1260 * mac80211 creates a transmit LED trigger for each wireless hardware 1261 * that can be used to drive LEDs if your driver registers a LED device. 1262 * This function returns the name (or %NULL if not configured for LEDs) 1263 * of the trigger so you can automatically link the LED device. 1264 * 1265 * @hw: the hardware to get the LED trigger name for 1266 */ 1267static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1268{ 1269#ifdef CONFIG_MAC80211_LEDS 1270 return __ieee80211_get_tx_led_name(hw); 1271#else 1272 return NULL; 1273#endif 1274} 1275 1276/** 1277 * ieee80211_get_rx_led_name - get name of RX LED 1278 * 1279 * mac80211 creates a receive LED trigger for each wireless hardware 1280 * that can be used to drive LEDs if your driver registers a LED device. 1281 * This function returns the name (or %NULL if not configured for LEDs) 1282 * of the trigger so you can automatically link the LED device. 1283 * 1284 * @hw: the hardware to get the LED trigger name for 1285 */ 1286static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1287{ 1288#ifdef CONFIG_MAC80211_LEDS 1289 return __ieee80211_get_rx_led_name(hw); 1290#else 1291 return NULL; 1292#endif 1293} 1294 1295/** 1296 * ieee80211_get_assoc_led_name - get name of association LED 1297 * 1298 * mac80211 creates a association LED trigger for each wireless hardware 1299 * that can be used to drive LEDs if your driver registers a LED device. 1300 * This function returns the name (or %NULL if not configured for LEDs) 1301 * of the trigger so you can automatically link the LED device. 1302 * 1303 * @hw: the hardware to get the LED trigger name for 1304 */ 1305static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1306{ 1307#ifdef CONFIG_MAC80211_LEDS 1308 return __ieee80211_get_assoc_led_name(hw); 1309#else 1310 return NULL; 1311#endif 1312} 1313 1314/** 1315 * ieee80211_get_radio_led_name - get name of radio LED 1316 * 1317 * mac80211 creates a radio change LED trigger for each wireless hardware 1318 * that can be used to drive LEDs if your driver registers a LED device. 1319 * This function returns the name (or %NULL if not configured for LEDs) 1320 * of the trigger so you can automatically link the LED device. 1321 * 1322 * @hw: the hardware to get the LED trigger name for 1323 */ 1324static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1325{ 1326#ifdef CONFIG_MAC80211_LEDS 1327 return __ieee80211_get_radio_led_name(hw); 1328#else 1329 return NULL; 1330#endif 1331} 1332 1333/** 1334 * ieee80211_unregister_hw - Unregister a hardware device 1335 * 1336 * This function instructs mac80211 to free allocated resources 1337 * and unregister netdevices from the networking subsystem. 1338 * 1339 * @hw: the hardware to unregister 1340 */ 1341void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1342 1343/** 1344 * ieee80211_free_hw - free hardware descriptor 1345 * 1346 * This function frees everything that was allocated, including the 1347 * private data for the driver. You must call ieee80211_unregister_hw() 1348 * before calling this function. 1349 * 1350 * @hw: the hardware to free 1351 */ 1352void ieee80211_free_hw(struct ieee80211_hw *hw); 1353 1354/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1355void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1356 struct ieee80211_rx_status *status); 1357 1358/** 1359 * ieee80211_rx - receive frame 1360 * 1361 * Use this function to hand received frames to mac80211. The receive 1362 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1363 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1364 * 1365 * This function may not be called in IRQ context. Calls to this function 1366 * for a single hardware must be synchronized against each other. Calls 1367 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1368 * single hardware. 1369 * 1370 * @hw: the hardware this frame came in on 1371 * @skb: the buffer to receive, owned by mac80211 after this call 1372 * @status: status of this frame; the status pointer need not be valid 1373 * after this function returns 1374 */ 1375static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1376 struct ieee80211_rx_status *status) 1377{ 1378 __ieee80211_rx(hw, skb, status); 1379} 1380 1381/** 1382 * ieee80211_rx_irqsafe - receive frame 1383 * 1384 * Like ieee80211_rx() but can be called in IRQ context 1385 * (internally defers to a tasklet.) 1386 * 1387 * Calls to this function and ieee80211_rx() may not be mixed for a 1388 * single hardware. 1389 * 1390 * @hw: the hardware this frame came in on 1391 * @skb: the buffer to receive, owned by mac80211 after this call 1392 * @status: status of this frame; the status pointer need not be valid 1393 * after this function returns and is not freed by mac80211, 1394 * it is recommended that it points to a stack area 1395 */ 1396void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1397 struct sk_buff *skb, 1398 struct ieee80211_rx_status *status); 1399 1400/** 1401 * ieee80211_tx_status - transmit status callback 1402 * 1403 * Call this function for all transmitted frames after they have been 1404 * transmitted. It is permissible to not call this function for 1405 * multicast frames but this can affect statistics. 1406 * 1407 * This function may not be called in IRQ context. Calls to this function 1408 * for a single hardware must be synchronized against each other. Calls 1409 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1410 * for a single hardware. 1411 * 1412 * @hw: the hardware the frame was transmitted by 1413 * @skb: the frame that was transmitted, owned by mac80211 after this call 1414 */ 1415void ieee80211_tx_status(struct ieee80211_hw *hw, 1416 struct sk_buff *skb); 1417 1418/** 1419 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 1420 * 1421 * Like ieee80211_tx_status() but can be called in IRQ context 1422 * (internally defers to a tasklet.) 1423 * 1424 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1425 * single hardware. 1426 * 1427 * @hw: the hardware the frame was transmitted by 1428 * @skb: the frame that was transmitted, owned by mac80211 after this call 1429 */ 1430void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1431 struct sk_buff *skb); 1432 1433/** 1434 * ieee80211_beacon_get - beacon generation function 1435 * @hw: pointer obtained from ieee80211_alloc_hw(). 1436 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1437 * @control: will be filled with information needed to send this beacon. 1438 * 1439 * If the beacon frames are generated by the host system (i.e., not in 1440 * hardware/firmware), the low-level driver uses this function to receive 1441 * the next beacon frame from the 802.11 code. The low-level is responsible 1442 * for calling this function before beacon data is needed (e.g., based on 1443 * hardware interrupt). Returned skb is used only once and low-level driver 1444 * is responsible of freeing it. 1445 */ 1446struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1447 struct ieee80211_vif *vif); 1448 1449/** 1450 * ieee80211_rts_get - RTS frame generation function 1451 * @hw: pointer obtained from ieee80211_alloc_hw(). 1452 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1453 * @frame: pointer to the frame that is going to be protected by the RTS. 1454 * @frame_len: the frame length (in octets). 1455 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1456 * @rts: The buffer where to store the RTS frame. 1457 * 1458 * If the RTS frames are generated by the host system (i.e., not in 1459 * hardware/firmware), the low-level driver uses this function to receive 1460 * the next RTS frame from the 802.11 code. The low-level is responsible 1461 * for calling this function before and RTS frame is needed. 1462 */ 1463void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1464 const void *frame, size_t frame_len, 1465 const struct ieee80211_tx_info *frame_txctl, 1466 struct ieee80211_rts *rts); 1467 1468/** 1469 * ieee80211_rts_duration - Get the duration field for an RTS frame 1470 * @hw: pointer obtained from ieee80211_alloc_hw(). 1471 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1472 * @frame_len: the length of the frame that is going to be protected by the RTS. 1473 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1474 * 1475 * If the RTS is generated in firmware, but the host system must provide 1476 * the duration field, the low-level driver uses this function to receive 1477 * the duration field value in little-endian byteorder. 1478 */ 1479__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1480 struct ieee80211_vif *vif, size_t frame_len, 1481 const struct ieee80211_tx_info *frame_txctl); 1482 1483/** 1484 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1485 * @hw: pointer obtained from ieee80211_alloc_hw(). 1486 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1487 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1488 * @frame_len: the frame length (in octets). 1489 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1490 * @cts: The buffer where to store the CTS-to-self frame. 1491 * 1492 * If the CTS-to-self frames are generated by the host system (i.e., not in 1493 * hardware/firmware), the low-level driver uses this function to receive 1494 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1495 * for calling this function before and CTS-to-self frame is needed. 1496 */ 1497void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1498 struct ieee80211_vif *vif, 1499 const void *frame, size_t frame_len, 1500 const struct ieee80211_tx_info *frame_txctl, 1501 struct ieee80211_cts *cts); 1502 1503/** 1504 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1505 * @hw: pointer obtained from ieee80211_alloc_hw(). 1506 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1507 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1508 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1509 * 1510 * If the CTS-to-self is generated in firmware, but the host system must provide 1511 * the duration field, the low-level driver uses this function to receive 1512 * the duration field value in little-endian byteorder. 1513 */ 1514__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1515 struct ieee80211_vif *vif, 1516 size_t frame_len, 1517 const struct ieee80211_tx_info *frame_txctl); 1518 1519/** 1520 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1521 * @hw: pointer obtained from ieee80211_alloc_hw(). 1522 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1523 * @frame_len: the length of the frame. 1524 * @rate: the rate at which the frame is going to be transmitted. 1525 * 1526 * Calculate the duration field of some generic frame, given its 1527 * length and transmission rate (in 100kbps). 1528 */ 1529__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1530 struct ieee80211_vif *vif, 1531 size_t frame_len, 1532 struct ieee80211_rate *rate); 1533 1534/** 1535 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1536 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1537 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1538 * @control: will be filled with information needed to send returned frame. 1539 * 1540 * Function for accessing buffered broadcast and multicast frames. If 1541 * hardware/firmware does not implement buffering of broadcast/multicast 1542 * frames when power saving is used, 802.11 code buffers them in the host 1543 * memory. The low-level driver uses this function to fetch next buffered 1544 * frame. In most cases, this is used when generating beacon frame. This 1545 * function returns a pointer to the next buffered skb or NULL if no more 1546 * buffered frames are available. 1547 * 1548 * Note: buffered frames are returned only after DTIM beacon frame was 1549 * generated with ieee80211_beacon_get() and the low-level driver must thus 1550 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1551 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1552 * does not need to check for DTIM beacons separately and should be able to 1553 * use common code for all beacons. 1554 */ 1555struct sk_buff * 1556ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 1557 1558/** 1559 * ieee80211_get_hdrlen_from_skb - get header length from data 1560 * 1561 * Given an skb with a raw 802.11 header at the data pointer this function 1562 * returns the 802.11 header length in bytes (not including encryption 1563 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1564 * header the function returns 0. 1565 * 1566 * @skb: the frame 1567 */ 1568unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1569 1570/** 1571 * ieee80211_get_hdrlen - get header length from frame control 1572 * 1573 * This function returns the 802.11 header length in bytes (not including 1574 * encryption headers.) 1575 * 1576 * @fc: the frame control field (in CPU endianness) 1577 */ 1578int ieee80211_get_hdrlen(u16 fc); 1579 1580/** 1581 * ieee80211_hdrlen - get header length in bytes from frame control 1582 * @fc: frame control field in little-endian format 1583 */ 1584unsigned int ieee80211_hdrlen(__le16 fc); 1585 1586/** 1587 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1588 * 1589 * This function computes a TKIP rc4 key for an skb. It computes 1590 * a phase 1 key if needed (iv16 wraps around). This function is to 1591 * be used by drivers which can do HW encryption but need to compute 1592 * to phase 1/2 key in SW. 1593 * 1594 * @keyconf: the parameter passed with the set key 1595 * @skb: the skb for which the key is needed 1596 * @rc4key: a buffer to which the key will be written 1597 * @type: TBD 1598 * @key: TBD 1599 */ 1600void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1601 struct sk_buff *skb, 1602 enum ieee80211_tkip_key_type type, u8 *key); 1603/** 1604 * ieee80211_wake_queue - wake specific queue 1605 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1606 * @queue: queue number (counted from zero). 1607 * 1608 * Drivers should use this function instead of netif_wake_queue. 1609 */ 1610void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1611 1612/** 1613 * ieee80211_stop_queue - stop specific queue 1614 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1615 * @queue: queue number (counted from zero). 1616 * 1617 * Drivers should use this function instead of netif_stop_queue. 1618 */ 1619void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1620 1621/** 1622 * ieee80211_stop_queues - stop all queues 1623 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1624 * 1625 * Drivers should use this function instead of netif_stop_queue. 1626 */ 1627void ieee80211_stop_queues(struct ieee80211_hw *hw); 1628 1629/** 1630 * ieee80211_wake_queues - wake all queues 1631 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1632 * 1633 * Drivers should use this function instead of netif_wake_queue. 1634 */ 1635void ieee80211_wake_queues(struct ieee80211_hw *hw); 1636 1637/** 1638 * ieee80211_scan_completed - completed hardware scan 1639 * 1640 * When hardware scan offload is used (i.e. the hw_scan() callback is 1641 * assigned) this function needs to be called by the driver to notify 1642 * mac80211 that the scan finished. 1643 * 1644 * @hw: the hardware that finished the scan 1645 */ 1646void ieee80211_scan_completed(struct ieee80211_hw *hw); 1647 1648/** 1649 * ieee80211_iterate_active_interfaces - iterate active interfaces 1650 * 1651 * This function iterates over the interfaces associated with a given 1652 * hardware that are currently active and calls the callback for them. 1653 * This function allows the iterator function to sleep, when the iterator 1654 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 1655 * be used. 1656 * 1657 * @hw: the hardware struct of which the interfaces should be iterated over 1658 * @iterator: the iterator function to call 1659 * @data: first argument of the iterator function 1660 */ 1661void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1662 void (*iterator)(void *data, u8 *mac, 1663 struct ieee80211_vif *vif), 1664 void *data); 1665 1666/** 1667 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 1668 * 1669 * This function iterates over the interfaces associated with a given 1670 * hardware that are currently active and calls the callback for them. 1671 * This function requires the iterator callback function to be atomic, 1672 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 1673 * 1674 * @hw: the hardware struct of which the interfaces should be iterated over 1675 * @iterator: the iterator function to call, cannot sleep 1676 * @data: first argument of the iterator function 1677 */ 1678void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 1679 void (*iterator)(void *data, 1680 u8 *mac, 1681 struct ieee80211_vif *vif), 1682 void *data); 1683 1684/** 1685 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 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 * @return: success if addBA request was sent, failure otherwise 1690 * 1691 * Although mac80211/low level driver/user space application can estimate 1692 * the need to start aggregation on a certain RA/TID, the session level 1693 * will be managed by the mac80211. 1694 */ 1695int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1696 1697/** 1698 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 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 * 1703 * This function must be called by low level driver once it has 1704 * finished with preparations for the BA session. 1705 */ 1706void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1707 1708/** 1709 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1710 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1711 * @ra: receiver address of the BA session recipient. 1712 * @tid: the TID to BA on. 1713 * 1714 * This function must be called by low level driver once it has 1715 * finished with preparations for the BA session. 1716 * This version of the function is IRQ-safe. 1717 */ 1718void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1719 u16 tid); 1720 1721/** 1722 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1723 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1724 * @ra: receiver address of the BA session recipient 1725 * @tid: the TID to stop BA. 1726 * @initiator: if indicates initiator DELBA frame will be sent. 1727 * @return: error if no sta with matching da found, success otherwise 1728 * 1729 * Although mac80211/low level driver/user space application can estimate 1730 * the need to stop aggregation on a certain RA/TID, the session level 1731 * will be managed by the mac80211. 1732 */ 1733int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1734 u8 *ra, u16 tid, 1735 enum ieee80211_back_parties initiator); 1736 1737/** 1738 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1739 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1740 * @ra: receiver address of the BA session recipient. 1741 * @tid: the desired TID to BA on. 1742 * 1743 * This function must be called by low level driver once it has 1744 * finished with preparations for the BA session tear down. 1745 */ 1746void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1747 1748/** 1749 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1750 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1751 * @ra: receiver address of the BA session recipient. 1752 * @tid: the desired TID to BA on. 1753 * 1754 * This function must be called by low level driver once it has 1755 * finished with preparations for the BA session tear down. 1756 * This version of the function is IRQ-safe. 1757 */ 1758void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1759 u16 tid); 1760 1761/** 1762 * ieee80211_notify_mac - low level driver notification 1763 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1764 * @notif_type: enum ieee80211_notification_types 1765 * 1766 * This function must be called by low level driver to inform mac80211 of 1767 * low level driver status change or force mac80211 to re-assoc for low 1768 * level driver internal error that require re-assoc. 1769 */ 1770void ieee80211_notify_mac(struct ieee80211_hw *hw, 1771 enum ieee80211_notification_types notif_type); 1772#endif /* MAC80211_H */ 1773