mac80211.h revision fe3fa827314b877486c515a001c3e6f604f6f16f
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 */ 164enum ieee80211_bss_change { 165 BSS_CHANGED_ASSOC = 1<<0, 166 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 167 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 168 BSS_CHANGED_ERP_SLOT = 1<<3, 169 BSS_CHANGED_HT = 1<<4, 170}; 171 172/** 173 * struct ieee80211_bss_conf - holds the BSS's changing parameters 174 * 175 * This structure keeps information about a BSS (and an association 176 * to that BSS) that can change during the lifetime of the BSS. 177 * 178 * @assoc: association status 179 * @aid: association ID number, valid only when @assoc is true 180 * @use_cts_prot: use CTS protection 181 * @use_short_preamble: use 802.11b short preamble 182 * @use_short_slot: use short slot time (only relevant for ERP) 183 * @dtim_period: num of beacons before the next DTIM, for PSM 184 * @timestamp: beacon timestamp 185 * @beacon_int: beacon interval 186 * @assoc_capability: capabilities taken from assoc resp 187 * @assoc_ht: association in HT mode 188 * @ht_conf: ht capabilities 189 * @ht_bss_conf: ht extended capabilities 190 */ 191struct ieee80211_bss_conf { 192 /* association related data */ 193 bool assoc; 194 u16 aid; 195 /* erp related data */ 196 bool use_cts_prot; 197 bool use_short_preamble; 198 bool use_short_slot; 199 u8 dtim_period; 200 u16 beacon_int; 201 u16 assoc_capability; 202 u64 timestamp; 203 /* ht related data */ 204 bool assoc_ht; 205 struct ieee80211_ht_info *ht_conf; 206 struct ieee80211_ht_bss_info *ht_bss_conf; 207}; 208 209/** 210 * enum mac80211_tx_control_flags - flags to describe transmission information/status 211 * 212 * These flags are used with the @flags member of &ieee80211_tx_info. 213 * 214 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. 215 * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame 216 * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 217 * for combined 802.11g / 802.11b networks) 218 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 219 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD 220 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 221 * station 222 * @IEEE80211_TX_CTL_REQUEUE: TBD 223 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 224 * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD 225 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the 226 * through set_retry_limit configured long retry value 227 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 228 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 229 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 230 * of streams when this flag is on can be extracted from antenna_sel_tx, 231 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n 232 * antennas marked use MIMO_n. 233 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame 234 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 235 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 236 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval 237 * @IEEE80211_TX_CTL_INJECTED: TBD 238 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 239 * because the destination STA was in powersave mode. 240 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 241 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 242 * is for the whole aggregation. 243 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 244 * so consider using block ack request (BAR). 245 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 246 * number to this frame, taking care of not overwriting the fragment 247 * number and increasing the sequence number only when the 248 * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly 249 * assign sequence numbers to QoS-data frames but cannot do so correctly 250 * for non-QoS-data and management frames because beacons need them from 251 * that counter as well and mac80211 cannot guarantee proper sequencing. 252 * If this flag is set, the driver should instruct the hardware to 253 * assign a sequence number to the frame or assign one itself. Cf. IEEE 254 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 255 * beacons always be clear for frames without a sequence number field. 256 */ 257enum mac80211_tx_control_flags { 258 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 259 IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2), 260 IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3), 261 IEEE80211_TX_CTL_NO_ACK = BIT(4), 262 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5), 263 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6), 264 IEEE80211_TX_CTL_REQUEUE = BIT(7), 265 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8), 266 IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9), 267 IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10), 268 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12), 269 IEEE80211_TX_CTL_AMPDU = BIT(13), 270 IEEE80211_TX_CTL_OFDM_HT = BIT(14), 271 IEEE80211_TX_CTL_GREEN_FIELD = BIT(15), 272 IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16), 273 IEEE80211_TX_CTL_DUP_DATA = BIT(17), 274 IEEE80211_TX_CTL_SHORT_GI = BIT(18), 275 IEEE80211_TX_CTL_INJECTED = BIT(19), 276 IEEE80211_TX_STAT_TX_FILTERED = BIT(20), 277 IEEE80211_TX_STAT_ACK = BIT(21), 278 IEEE80211_TX_STAT_AMPDU = BIT(22), 279 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23), 280 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24), 281}; 282 283 284#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \ 285 (sizeof(((struct sk_buff *)0)->cb) - 8) 286#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \ 287 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)) 288 289/** 290 * struct ieee80211_tx_info - skb transmit information 291 * 292 * This structure is placed in skb->cb for three uses: 293 * (1) mac80211 TX control - mac80211 tells the driver what to do 294 * (2) driver internal use (if applicable) 295 * (3) TX status information - driver tells mac80211 what happened 296 * 297 * @flags: transmit info flags, defined above 298 * @band: TBD 299 * @tx_rate_idx: TBD 300 * @antenna_sel_tx: TBD 301 * @control: union for control data 302 * @status: union for status data 303 * @driver_data: array of driver_data pointers 304 * @retry_count: number of retries 305 * @excessive_retries: set to 1 if the frame was retried many times 306 * but not acknowledged 307 * @ampdu_ack_len: number of aggregated frames. 308 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 309 * @ampdu_ack_map: block ack bit map for the aggregation. 310 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 311 * @ack_signal: signal strength of the ACK frame 312 */ 313struct ieee80211_tx_info { 314 /* common information */ 315 u32 flags; 316 u8 band; 317 s8 tx_rate_idx; 318 u8 antenna_sel_tx; 319 320 /* 1 byte hole */ 321 322 union { 323 struct { 324 struct ieee80211_vif *vif; 325 struct ieee80211_key_conf *hw_key; 326 unsigned long jiffies; 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 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 371 */ 372enum mac80211_rx_flags { 373 RX_FLAG_MMIC_ERROR = 1<<0, 374 RX_FLAG_DECRYPTED = 1<<1, 375 RX_FLAG_RADIOTAP = 1<<2, 376 RX_FLAG_MMIC_STRIPPED = 1<<3, 377 RX_FLAG_IV_STRIPPED = 1<<4, 378 RX_FLAG_FAILED_FCS_CRC = 1<<5, 379 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 380 RX_FLAG_TSFT = 1<<7, 381 RX_FLAG_SHORTPRE = 1<<8 382}; 383 384/** 385 * struct ieee80211_rx_status - receive status 386 * 387 * The low-level driver should provide this information (the subset 388 * supported by hardware) to the 802.11 code with each received 389 * frame. 390 * 391 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 392 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 393 * @band: the active band when this frame was received 394 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 395 * @signal: signal strength when receiving this frame, either in dBm, in dB or 396 * unspecified depending on the hardware capabilities flags 397 * @IEEE80211_HW_SIGNAL_* 398 * @noise: noise when receiving this frame, in dBm. 399 * @qual: overall signal quality indication, in percent (0-100). 400 * @antenna: antenna used 401 * @rate_idx: index of data rate into band's supported rates 402 * @flag: %RX_FLAG_* 403 */ 404struct ieee80211_rx_status { 405 u64 mactime; 406 enum ieee80211_band band; 407 int freq; 408 int signal; 409 int noise; 410 int qual; 411 int antenna; 412 int rate_idx; 413 int flag; 414}; 415 416/** 417 * enum ieee80211_conf_flags - configuration flags 418 * 419 * Flags to define PHY configuration options 420 * 421 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 422 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 423 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 424 * @IEEE80211_CONF_PS: Enable 802.11 power save mode 425 */ 426enum ieee80211_conf_flags { 427 /* 428 * TODO: IEEE80211_CONF_SHORT_SLOT_TIME will be removed once drivers 429 * have been converted to use bss_info_changed() for slot time 430 * configuration 431 */ 432 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 433 IEEE80211_CONF_RADIOTAP = (1<<1), 434 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 435 IEEE80211_CONF_PS = (1<<3), 436}; 437 438/** 439 * struct ieee80211_conf - configuration of the device 440 * 441 * This struct indicates how the driver shall configure the hardware. 442 * 443 * @radio_enabled: when zero, driver is required to switch off the radio. 444 * TODO make a flag 445 * @beacon_int: beacon interval (TODO make interface config) 446 * @listen_interval: listen interval in units of beacon interval 447 * @flags: configuration flags defined above 448 * @power_level: requested transmit power (in dBm) 449 * @max_antenna_gain: maximum antenna gain (in dBi) 450 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 451 * 1/2: antenna 0/1 452 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 453 * @ht_conf: describes current self configuration of 802.11n HT capabilies 454 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 455 * @channel: the channel to tune to 456 */ 457struct ieee80211_conf { 458 int radio_enabled; 459 460 int beacon_int; 461 u16 listen_interval; 462 u32 flags; 463 int power_level; 464 int max_antenna_gain; 465 u8 antenna_sel_tx; 466 u8 antenna_sel_rx; 467 468 struct ieee80211_channel *channel; 469 470 struct ieee80211_ht_info ht_conf; 471 struct ieee80211_ht_bss_info ht_bss_conf; 472}; 473 474/** 475 * enum ieee80211_if_types - types of 802.11 network interfaces 476 * 477 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 478 * by mac80211 itself 479 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 480 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 481 * daemon. Drivers should never see this type. 482 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 483 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 484 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 485 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 486 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 487 * will never see this type. 488 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 489 */ 490enum ieee80211_if_types { 491 IEEE80211_IF_TYPE_INVALID, 492 IEEE80211_IF_TYPE_AP, 493 IEEE80211_IF_TYPE_STA, 494 IEEE80211_IF_TYPE_IBSS, 495 IEEE80211_IF_TYPE_MESH_POINT, 496 IEEE80211_IF_TYPE_MNTR, 497 IEEE80211_IF_TYPE_WDS, 498 IEEE80211_IF_TYPE_VLAN, 499}; 500 501/** 502 * struct ieee80211_vif - per-interface data 503 * 504 * Data in this structure is continually present for driver 505 * use during the life of a virtual interface. 506 * 507 * @type: type of this virtual interface 508 * @drv_priv: data area for driver use, will always be aligned to 509 * sizeof(void *). 510 */ 511struct ieee80211_vif { 512 enum ieee80211_if_types type; 513 /* must be last */ 514 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 515}; 516 517static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 518{ 519#ifdef CONFIG_MAC80211_MESH 520 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 521#endif 522 return false; 523} 524 525/** 526 * struct ieee80211_if_init_conf - initial configuration of an interface 527 * 528 * @vif: pointer to a driver-use per-interface structure. The pointer 529 * itself is also used for various functions including 530 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 531 * @type: one of &enum ieee80211_if_types constants. Determines the type of 532 * added/removed interface. 533 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 534 * until the interface is removed (i.e. it cannot be used after 535 * remove_interface() callback was called for this interface). 536 * 537 * This structure is used in add_interface() and remove_interface() 538 * callbacks of &struct ieee80211_hw. 539 * 540 * When you allow multiple interfaces to be added to your PHY, take care 541 * that the hardware can actually handle multiple MAC addresses. However, 542 * also take care that when there's no interface left with mac_addr != %NULL 543 * you remove the MAC address from the device to avoid acknowledging packets 544 * in pure monitor mode. 545 */ 546struct ieee80211_if_init_conf { 547 enum ieee80211_if_types type; 548 struct ieee80211_vif *vif; 549 void *mac_addr; 550}; 551 552/** 553 * enum ieee80211_if_conf_change - interface config change flags 554 * 555 * @IEEE80211_IFCC_BSSID: The BSSID changed. 556 * @IEEE80211_IFCC_SSID: The SSID changed. 557 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed 558 * (currently AP and MESH only), use ieee80211_beacon_get(). 559 */ 560enum ieee80211_if_conf_change { 561 IEEE80211_IFCC_BSSID = BIT(0), 562 IEEE80211_IFCC_SSID = BIT(1), 563 IEEE80211_IFCC_BEACON = BIT(2), 564}; 565 566/** 567 * struct ieee80211_if_conf - configuration of an interface 568 * 569 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change. 570 * @bssid: BSSID of the network we are associated to/creating. 571 * @ssid: used (together with @ssid_len) by drivers for hardware that 572 * generate beacons independently. The pointer is valid only during the 573 * config_interface() call, so copy the value somewhere if you need 574 * it. 575 * @ssid_len: length of the @ssid field. 576 * 577 * This structure is passed to the config_interface() callback of 578 * &struct ieee80211_hw. 579 */ 580struct ieee80211_if_conf { 581 u32 changed; 582 u8 *bssid; 583 u8 *ssid; 584 size_t ssid_len; 585}; 586 587/** 588 * enum ieee80211_key_alg - key algorithm 589 * @ALG_WEP: WEP40 or WEP104 590 * @ALG_TKIP: TKIP 591 * @ALG_CCMP: CCMP (AES) 592 */ 593enum ieee80211_key_alg { 594 ALG_WEP, 595 ALG_TKIP, 596 ALG_CCMP, 597}; 598 599/** 600 * enum ieee80211_key_len - key length 601 * @LEN_WEP40: WEP 5-byte long key 602 * @LEN_WEP104: WEP 13-byte long key 603 */ 604enum ieee80211_key_len { 605 LEN_WEP40 = 5, 606 LEN_WEP104 = 13, 607}; 608 609/** 610 * enum ieee80211_key_flags - key flags 611 * 612 * These flags are used for communication about keys between the driver 613 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 614 * 615 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 616 * that the STA this key will be used with could be using QoS. 617 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 618 * driver to indicate that it requires IV generation for this 619 * particular key. 620 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 621 * the driver for a TKIP key if it requires Michael MIC 622 * generation in software. 623 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 624 * that the key is pairwise rather then a shared key. 625 */ 626enum ieee80211_key_flags { 627 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 628 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 629 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 630 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 631}; 632 633/** 634 * struct ieee80211_key_conf - key information 635 * 636 * This key information is given by mac80211 to the driver by 637 * the set_key() callback in &struct ieee80211_ops. 638 * 639 * @hw_key_idx: To be set by the driver, this is the key index the driver 640 * wants to be given when a frame is transmitted and needs to be 641 * encrypted in hardware. 642 * @alg: The key algorithm. 643 * @flags: key flags, see &enum ieee80211_key_flags. 644 * @keyidx: the key index (0-3) 645 * @keylen: key material length 646 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 647 * data block: 648 * - Temporal Encryption Key (128 bits) 649 * - Temporal Authenticator Tx MIC Key (64 bits) 650 * - Temporal Authenticator Rx MIC Key (64 bits) 651 * 652 */ 653struct ieee80211_key_conf { 654 enum ieee80211_key_alg alg; 655 u8 hw_key_idx; 656 u8 flags; 657 s8 keyidx; 658 u8 keylen; 659 u8 key[0]; 660}; 661 662/** 663 * enum set_key_cmd - key command 664 * 665 * Used with the set_key() callback in &struct ieee80211_ops, this 666 * indicates whether a key is being removed or added. 667 * 668 * @SET_KEY: a key is set 669 * @DISABLE_KEY: a key must be disabled 670 */ 671enum set_key_cmd { 672 SET_KEY, DISABLE_KEY, 673}; 674 675/** 676 * enum sta_notify_cmd - sta notify command 677 * 678 * Used with the sta_notify() callback in &struct ieee80211_ops, this 679 * indicates addition and removal of a station to station table. 680 * 681 * @STA_NOTIFY_ADD: a station was added to the station table 682 * @STA_NOTIFY_REMOVE: a station being removed from the station table 683 */ 684enum sta_notify_cmd { 685 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 686}; 687 688/** 689 * enum ieee80211_tkip_key_type - get tkip key 690 * 691 * Used by drivers which need to get a tkip key for skb. Some drivers need a 692 * phase 1 key, others need a phase 2 key. A single function allows the driver 693 * to get the key, this enum indicates what type of key is required. 694 * 695 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 696 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 697 */ 698enum ieee80211_tkip_key_type { 699 IEEE80211_TKIP_P1_KEY, 700 IEEE80211_TKIP_P2_KEY, 701}; 702 703/** 704 * enum ieee80211_hw_flags - hardware flags 705 * 706 * These flags are used to indicate hardware capabilities to 707 * the stack. Generally, flags here should have their meaning 708 * done in a way that the simplest hardware doesn't need setting 709 * any particular flags. There are some exceptions to this rule, 710 * however, so you are advised to review these flags carefully. 711 * 712 * @IEEE80211_HW_RX_INCLUDES_FCS: 713 * Indicates that received frames passed to the stack include 714 * the FCS at the end. 715 * 716 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 717 * Some wireless LAN chipsets buffer broadcast/multicast frames 718 * for power saving stations in the hardware/firmware and others 719 * rely on the host system for such buffering. This option is used 720 * to configure the IEEE 802.11 upper layer to buffer broadcast and 721 * multicast frames when there are power saving stations so that 722 * the driver can fetch them with ieee80211_get_buffered_bc(). 723 * 724 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 725 * Hardware is not capable of short slot operation on the 2.4 GHz band. 726 * 727 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 728 * Hardware is not capable of receiving frames with short preamble on 729 * the 2.4 GHz band. 730 * 731 * @IEEE80211_HW_SIGNAL_UNSPEC: 732 * Hardware can provide signal values but we don't know its units. We 733 * expect values between 0 and @max_signal. 734 * If possible please provide dB or dBm instead. 735 * 736 * @IEEE80211_HW_SIGNAL_DB: 737 * Hardware gives signal values in dB, decibel difference from an 738 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 739 * If possible please provide dBm instead. 740 * 741 * @IEEE80211_HW_SIGNAL_DBM: 742 * Hardware gives signal values in dBm, decibel difference from 743 * one milliwatt. This is the preferred method since it is standardized 744 * between different devices. @max_signal does not need to be set. 745 * 746 * @IEEE80211_HW_NOISE_DBM: 747 * Hardware can provide noise (radio interference) values in units dBm, 748 * decibel difference from one milliwatt. 749 * 750 * @IEEE80211_HW_SPECTRUM_MGMT: 751 * Hardware supports spectrum management defined in 802.11h 752 * Measurement, Channel Switch, Quieting, TPC 753 */ 754enum ieee80211_hw_flags { 755 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 756 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 757 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 758 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 759 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 760 IEEE80211_HW_SIGNAL_DB = 1<<6, 761 IEEE80211_HW_SIGNAL_DBM = 1<<7, 762 IEEE80211_HW_NOISE_DBM = 1<<8, 763 IEEE80211_HW_SPECTRUM_MGMT = 1<<9, 764}; 765 766/** 767 * struct ieee80211_hw - hardware information and state 768 * 769 * This structure contains the configuration and hardware 770 * information for an 802.11 PHY. 771 * 772 * @wiphy: This points to the &struct wiphy allocated for this 773 * 802.11 PHY. You must fill in the @perm_addr and @dev 774 * members of this structure using SET_IEEE80211_DEV() 775 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 776 * bands (with channels, bitrates) are registered here. 777 * 778 * @conf: &struct ieee80211_conf, device configuration, don't use. 779 * 780 * @workqueue: single threaded workqueue available for driver use, 781 * allocated by mac80211 on registration and flushed when an 782 * interface is removed. 783 * NOTICE: All work performed on this workqueue should NEVER 784 * acquire the RTNL lock (i.e. Don't use the function 785 * ieee80211_iterate_active_interfaces()) 786 * 787 * @priv: pointer to private area that was allocated for driver use 788 * along with this structure. 789 * 790 * @flags: hardware flags, see &enum ieee80211_hw_flags. 791 * 792 * @extra_tx_headroom: headroom to reserve in each transmit skb 793 * for use by the driver (e.g. for transmit headers.) 794 * 795 * @channel_change_time: time (in microseconds) it takes to change channels. 796 * 797 * @max_signal: Maximum value for signal (rssi) in RX information, used 798 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 799 * 800 * @max_listen_interval: max listen interval in units of beacon interval 801 * that HW supports 802 * 803 * @queues: number of available hardware transmit queues for 804 * data packets. WMM/QoS requires at least four, these 805 * queues need to have configurable access parameters. 806 * 807 * @ampdu_queues: number of available hardware transmit queues 808 * for A-MPDU packets, these have no access parameters 809 * because they're used only for A-MPDU frames. Note that 810 * mac80211 will not currently use any of the regular queues 811 * for aggregation. 812 * 813 * @rate_control_algorithm: rate control algorithm for this hardware. 814 * If unset (NULL), the default algorithm will be used. Must be 815 * set before calling ieee80211_register_hw(). 816 * 817 * @vif_data_size: size (in bytes) of the drv_priv data area 818 * within &struct ieee80211_vif. 819 */ 820struct ieee80211_hw { 821 struct ieee80211_conf conf; 822 struct wiphy *wiphy; 823 struct workqueue_struct *workqueue; 824 const char *rate_control_algorithm; 825 void *priv; 826 u32 flags; 827 unsigned int extra_tx_headroom; 828 int channel_change_time; 829 int vif_data_size; 830 u16 queues; 831 u16 ampdu_queues; 832 u16 max_listen_interval; 833 s8 max_signal; 834}; 835 836/** 837 * SET_IEEE80211_DEV - set device for 802.11 hardware 838 * 839 * @hw: the &struct ieee80211_hw to set the device for 840 * @dev: the &struct device of this 802.11 device 841 */ 842static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 843{ 844 set_wiphy_dev(hw->wiphy, dev); 845} 846 847/** 848 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 849 * 850 * @hw: the &struct ieee80211_hw to set the MAC address for 851 * @addr: the address to set 852 */ 853static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 854{ 855 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 856} 857 858static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw) 859{ 860 return hw->queues; 861} 862 863static inline int ieee80211_num_queues(struct ieee80211_hw *hw) 864{ 865 return hw->queues + hw->ampdu_queues; 866} 867 868static inline struct ieee80211_rate * 869ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 870 const struct ieee80211_tx_info *c) 871{ 872 if (WARN_ON(c->tx_rate_idx < 0)) 873 return NULL; 874 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 875} 876 877static inline struct ieee80211_rate * 878ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 879 const struct ieee80211_tx_info *c) 880{ 881 if (c->control.rts_cts_rate_idx < 0) 882 return NULL; 883 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 884} 885 886static inline struct ieee80211_rate * 887ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 888 const struct ieee80211_tx_info *c) 889{ 890 if (c->control.alt_retry_rate_idx < 0) 891 return NULL; 892 return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx]; 893} 894 895/** 896 * DOC: Hardware crypto acceleration 897 * 898 * mac80211 is capable of taking advantage of many hardware 899 * acceleration designs for encryption and decryption operations. 900 * 901 * The set_key() callback in the &struct ieee80211_ops for a given 902 * device is called to enable hardware acceleration of encryption and 903 * decryption. The callback takes an @address parameter that will be 904 * the broadcast address for default keys, the other station's hardware 905 * address for individual keys or the zero address for keys that will 906 * be used only for transmission. 907 * Multiple transmission keys with the same key index may be used when 908 * VLANs are configured for an access point. 909 * 910 * The @local_address parameter will always be set to our own address, 911 * this is only relevant if you support multiple local addresses. 912 * 913 * When transmitting, the TX control data will use the @hw_key_idx 914 * selected by the driver by modifying the &struct ieee80211_key_conf 915 * pointed to by the @key parameter to the set_key() function. 916 * 917 * The set_key() call for the %SET_KEY command should return 0 if 918 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 919 * added; if you return 0 then hw_key_idx must be assigned to the 920 * hardware key index, you are free to use the full u8 range. 921 * 922 * When the cmd is %DISABLE_KEY then it must succeed. 923 * 924 * Note that it is permissible to not decrypt a frame even if a key 925 * for it has been uploaded to hardware, the stack will not make any 926 * decision based on whether a key has been uploaded or not but rather 927 * based on the receive flags. 928 * 929 * The &struct ieee80211_key_conf structure pointed to by the @key 930 * parameter is guaranteed to be valid until another call to set_key() 931 * removes it, but it can only be used as a cookie to differentiate 932 * keys. 933 * 934 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 935 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 936 * handler. 937 * The update_tkip_key() call updates the driver with the new phase 1 key. 938 * This happens everytime the iv16 wraps around (every 65536 packets). The 939 * set_key() call will happen only once for each key (unless the AP did 940 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 941 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 942 * handler is software decryption with wrap around of iv16. 943 */ 944 945/** 946 * DOC: Frame filtering 947 * 948 * mac80211 requires to see many management frames for proper 949 * operation, and users may want to see many more frames when 950 * in monitor mode. However, for best CPU usage and power consumption, 951 * having as few frames as possible percolate through the stack is 952 * desirable. Hence, the hardware should filter as much as possible. 953 * 954 * To achieve this, mac80211 uses filter flags (see below) to tell 955 * the driver's configure_filter() function which frames should be 956 * passed to mac80211 and which should be filtered out. 957 * 958 * The configure_filter() callback is invoked with the parameters 959 * @mc_count and @mc_list for the combined multicast address list 960 * of all virtual interfaces, @changed_flags telling which flags 961 * were changed and @total_flags with the new flag states. 962 * 963 * If your device has no multicast address filters your driver will 964 * need to check both the %FIF_ALLMULTI flag and the @mc_count 965 * parameter to see whether multicast frames should be accepted 966 * or dropped. 967 * 968 * All unsupported flags in @total_flags must be cleared. 969 * Hardware does not support a flag if it is incapable of _passing_ 970 * the frame to the stack. Otherwise the driver must ignore 971 * the flag, but not clear it. 972 * You must _only_ clear the flag (announce no support for the 973 * flag to mac80211) if you are not able to pass the packet type 974 * to the stack (so the hardware always filters it). 975 * So for example, you should clear @FIF_CONTROL, if your hardware 976 * always filters control frames. If your hardware always passes 977 * control frames to the kernel and is incapable of filtering them, 978 * you do _not_ clear the @FIF_CONTROL flag. 979 * This rule applies to all other FIF flags as well. 980 */ 981 982/** 983 * enum ieee80211_filter_flags - hardware filter flags 984 * 985 * These flags determine what the filter in hardware should be 986 * programmed to let through and what should not be passed to the 987 * stack. It is always safe to pass more frames than requested, 988 * but this has negative impact on power consumption. 989 * 990 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 991 * think of the BSS as your network segment and then this corresponds 992 * to the regular ethernet device promiscuous mode. 993 * 994 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 995 * by the user or if the hardware is not capable of filtering by 996 * multicast address. 997 * 998 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 999 * %RX_FLAG_FAILED_FCS_CRC for them) 1000 * 1001 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1002 * the %RX_FLAG_FAILED_PLCP_CRC for them 1003 * 1004 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1005 * to the hardware that it should not filter beacons or probe responses 1006 * by BSSID. Filtering them can greatly reduce the amount of processing 1007 * mac80211 needs to do and the amount of CPU wakeups, so you should 1008 * honour this flag if possible. 1009 * 1010 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 1011 * only those addressed to this station 1012 * 1013 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1014 */ 1015enum ieee80211_filter_flags { 1016 FIF_PROMISC_IN_BSS = 1<<0, 1017 FIF_ALLMULTI = 1<<1, 1018 FIF_FCSFAIL = 1<<2, 1019 FIF_PLCPFAIL = 1<<3, 1020 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1021 FIF_CONTROL = 1<<5, 1022 FIF_OTHER_BSS = 1<<6, 1023}; 1024 1025/** 1026 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1027 * 1028 * These flags are used with the ampdu_action() callback in 1029 * &struct ieee80211_ops to indicate which action is needed. 1030 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1031 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1032 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1033 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1034 */ 1035enum ieee80211_ampdu_mlme_action { 1036 IEEE80211_AMPDU_RX_START, 1037 IEEE80211_AMPDU_RX_STOP, 1038 IEEE80211_AMPDU_TX_START, 1039 IEEE80211_AMPDU_TX_STOP, 1040}; 1041 1042/** 1043 * struct ieee80211_ops - callbacks from mac80211 to the driver 1044 * 1045 * This structure contains various callbacks that the driver may 1046 * handle or, in some cases, must handle, for example to configure 1047 * the hardware to a new channel or to transmit a frame. 1048 * 1049 * @tx: Handler that 802.11 module calls for each transmitted frame. 1050 * skb contains the buffer starting from the IEEE 802.11 header. 1051 * The low-level driver should send the frame out based on 1052 * configuration in the TX control data. This handler should, 1053 * preferably, never fail and stop queues appropriately, more 1054 * importantly, however, it must never fail for A-MPDU-queues. 1055 * Must be implemented and atomic. 1056 * 1057 * @start: Called before the first netdevice attached to the hardware 1058 * is enabled. This should turn on the hardware and must turn on 1059 * frame reception (for possibly enabled monitor interfaces.) 1060 * Returns negative error codes, these may be seen in userspace, 1061 * or zero. 1062 * When the device is started it should not have a MAC address 1063 * to avoid acknowledging frames before a non-monitor device 1064 * is added. 1065 * Must be implemented. 1066 * 1067 * @stop: Called after last netdevice attached to the hardware 1068 * is disabled. This should turn off the hardware (at least 1069 * it must turn off frame reception.) 1070 * May be called right after add_interface if that rejects 1071 * an interface. 1072 * Must be implemented. 1073 * 1074 * @add_interface: Called when a netdevice attached to the hardware is 1075 * enabled. Because it is not called for monitor mode devices, @open 1076 * and @stop must be implemented. 1077 * The driver should perform any initialization it needs before 1078 * the device can be enabled. The initial configuration for the 1079 * interface is given in the conf parameter. 1080 * The callback may refuse to add an interface by returning a 1081 * negative error code (which will be seen in userspace.) 1082 * Must be implemented. 1083 * 1084 * @remove_interface: Notifies a driver that an interface is going down. 1085 * The @stop callback is called after this if it is the last interface 1086 * and no monitor interfaces are present. 1087 * When all interfaces are removed, the MAC address in the hardware 1088 * must be cleared so the device no longer acknowledges packets, 1089 * the mac_addr member of the conf structure is, however, set to the 1090 * MAC address of the device going away. 1091 * Hence, this callback must be implemented. 1092 * 1093 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1094 * function to change hardware configuration, e.g., channel. 1095 * 1096 * @config_interface: Handler for configuration requests related to interfaces 1097 * (e.g. BSSID changes.) 1098 * 1099 * @bss_info_changed: Handler for configuration requests related to BSS 1100 * parameters that may vary during BSS's lifespan, and may affect low 1101 * level driver (e.g. assoc/disassoc status, erp parameters). 1102 * This function should not be used if no BSS has been set, unless 1103 * for association indication. The @changed parameter indicates which 1104 * of the bss parameters has changed when a call is made. 1105 * 1106 * @configure_filter: Configure the device's RX filter. 1107 * See the section "Frame filtering" for more information. 1108 * This callback must be implemented and atomic. 1109 * 1110 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1111 * must be set or cleared 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. 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_hdrlen - get header length in bytes from frame control 1572 * @fc: frame control field in little-endian format 1573 */ 1574unsigned int ieee80211_hdrlen(__le16 fc); 1575 1576/** 1577 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1578 * 1579 * This function computes a TKIP rc4 key for an skb. It computes 1580 * a phase 1 key if needed (iv16 wraps around). This function is to 1581 * be used by drivers which can do HW encryption but need to compute 1582 * to phase 1/2 key in SW. 1583 * 1584 * @keyconf: the parameter passed with the set key 1585 * @skb: the skb for which the key is needed 1586 * @rc4key: a buffer to which the key will be written 1587 * @type: TBD 1588 * @key: TBD 1589 */ 1590void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1591 struct sk_buff *skb, 1592 enum ieee80211_tkip_key_type type, u8 *key); 1593/** 1594 * ieee80211_wake_queue - wake specific queue 1595 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1596 * @queue: queue number (counted from zero). 1597 * 1598 * Drivers should use this function instead of netif_wake_queue. 1599 */ 1600void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1601 1602/** 1603 * ieee80211_stop_queue - stop specific queue 1604 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1605 * @queue: queue number (counted from zero). 1606 * 1607 * Drivers should use this function instead of netif_stop_queue. 1608 */ 1609void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1610 1611/** 1612 * ieee80211_queue_stopped - test status of the queue 1613 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1614 * @queue: queue number (counted from zero). 1615 * 1616 * Drivers should use this function instead of netif_stop_queue. 1617 */ 1618 1619int ieee80211_queue_stopped(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