1 /* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #ifndef MAC80211_H 14 #define MAC80211_H 15 16 #include <linux/kernel.h> 17 #include <linux/if_ether.h> 18 #include <linux/skbuff.h> 19 #include <linux/wireless.h> 20 #include <linux/device.h> 21 #include <linux/ieee80211.h> 22 #include <net/wireless.h> 23 #include <net/cfg80211.h> 24 25 /** 26 * DOC: Introduction 27 * 28 * mac80211 is the Linux stack for 802.11 hardware that implements 29 * only partial functionality in hard- or firmware. This document 30 * defines the interface between mac80211 and low-level hardware 31 * drivers. 32 */ 33 34 /** 35 * DOC: Calling mac80211 from interrupts 36 * 37 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 38 * called in hardware interrupt context. The low-level driver must not call any 39 * other functions in hardware interrupt context. If there is a need for such 40 * call, the low-level driver should first ACK the interrupt and perform the 41 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 42 * tasklet function. 43 * 44 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 45 * use the non-irqsafe functions! 46 */ 47 48 /** 49 * DOC: Warning 50 * 51 * If you're reading this document and not the header file itself, it will 52 * be incomplete because not all documentation has been converted yet. 53 */ 54 55 /** 56 * DOC: Frame format 57 * 58 * As a general rule, when frames are passed between mac80211 and the driver, 59 * they start with the IEEE 802.11 header and include the same octets that are 60 * sent over the air except for the FCS which should be calculated by the 61 * hardware. 62 * 63 * There are, however, various exceptions to this rule for advanced features: 64 * 65 * The first exception is for hardware encryption and decryption offload 66 * where the IV/ICV may or may not be generated in hardware. 67 * 68 * Secondly, when the hardware handles fragmentation, the frame handed to 69 * the driver from mac80211 is the MSDU, not the MPDU. 70 * 71 * Finally, for received frames, the driver is able to indicate that it has 72 * filled a radiotap header and put that in front of the frame; if it does 73 * not do so then mac80211 may add this under certain circumstances. 74 */ 75 76 /** 77 * enum ieee80211_notification_type - Low level driver notification 78 * @IEEE80211_NOTIFY_RE_ASSOC: start the re-association sequence 79 */ 80 enum 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 */ 94 struct 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 * struct ieee80211_tx_queue_params - transmit queue configuration 102 * 103 * The information provided in this structure is required for QoS 104 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 105 * 106 * @aifs: arbitration interface space [0..255, -1: use default] 107 * @cw_min: minimum contention window [will be a value of the form 108 * 2^n-1 in the range 1..1023; 0: use default] 109 * @cw_max: maximum contention window [like @cw_min] 110 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 111 */ 112 struct ieee80211_tx_queue_params { 113 s16 aifs; 114 u16 cw_min; 115 u16 cw_max; 116 u16 txop; 117 }; 118 119 /** 120 * struct ieee80211_tx_queue_stats_data - transmit queue statistics 121 * 122 * @len: number of packets in queue 123 * @limit: queue length limit 124 * @count: number of frames sent 125 */ 126 struct ieee80211_tx_queue_stats_data { 127 unsigned int len; 128 unsigned int limit; 129 unsigned int count; 130 }; 131 132 /** 133 * enum ieee80211_tx_queue - transmit queue number 134 * 135 * These constants are used with some callbacks that take a 136 * queue number to set parameters for a queue. 137 * 138 * @IEEE80211_TX_QUEUE_DATA0: data queue 0 139 * @IEEE80211_TX_QUEUE_DATA1: data queue 1 140 * @IEEE80211_TX_QUEUE_DATA2: data queue 2 141 * @IEEE80211_TX_QUEUE_DATA3: data queue 3 142 * @IEEE80211_TX_QUEUE_DATA4: data queue 4 143 * @IEEE80211_TX_QUEUE_SVP: ?? 144 * @NUM_TX_DATA_QUEUES: number of data queues 145 * @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be 146 * sent after a beacon 147 * @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames 148 * @NUM_TX_DATA_QUEUES_AMPDU: adding more queues for A-MPDU 149 */ 150 enum ieee80211_tx_queue { 151 IEEE80211_TX_QUEUE_DATA0, 152 IEEE80211_TX_QUEUE_DATA1, 153 IEEE80211_TX_QUEUE_DATA2, 154 IEEE80211_TX_QUEUE_DATA3, 155 IEEE80211_TX_QUEUE_DATA4, 156 IEEE80211_TX_QUEUE_SVP, 157 158 NUM_TX_DATA_QUEUES, 159 160 /* due to stupidity in the sub-ioctl userspace interface, the items in 161 * this struct need to have fixed values. As soon as it is removed, we can 162 * fix these entries. */ 163 IEEE80211_TX_QUEUE_AFTER_BEACON = 6, 164 IEEE80211_TX_QUEUE_BEACON = 7, 165 NUM_TX_DATA_QUEUES_AMPDU = 16 166 }; 167 168 struct ieee80211_tx_queue_stats { 169 struct ieee80211_tx_queue_stats_data data[NUM_TX_DATA_QUEUES_AMPDU]; 170 }; 171 172 struct ieee80211_low_level_stats { 173 unsigned int dot11ACKFailureCount; 174 unsigned int dot11RTSFailureCount; 175 unsigned int dot11FCSErrorCount; 176 unsigned int dot11RTSSuccessCount; 177 }; 178 179 /** 180 * enum ieee80211_bss_change - BSS change notification flags 181 * 182 * These flags are used with the bss_info_changed() callback 183 * to indicate which BSS parameter changed. 184 * 185 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 186 * also implies a change in the AID. 187 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 188 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 189 * @BSS_CHANGED_HT: 802.11n parameters changed 190 */ 191 enum ieee80211_bss_change { 192 BSS_CHANGED_ASSOC = 1<<0, 193 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 194 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 195 BSS_CHANGED_HT = 1<<4, 196 }; 197 198 /** 199 * struct ieee80211_bss_conf - holds the BSS's changing parameters 200 * 201 * This structure keeps information about a BSS (and an association 202 * to that BSS) that can change during the lifetime of the BSS. 203 * 204 * @assoc: association status 205 * @aid: association ID number, valid only when @assoc is true 206 * @use_cts_prot: use CTS protection 207 * @use_short_preamble: use 802.11b short preamble 208 * @timestamp: beacon timestamp 209 * @beacon_int: beacon interval 210 * @assoc_capability: capabbilities taken from assoc resp 211 * @assoc_ht: association in HT mode 212 * @ht_conf: ht capabilities 213 * @ht_bss_conf: ht extended capabilities 214 */ 215 struct ieee80211_bss_conf { 216 /* association related data */ 217 bool assoc; 218 u16 aid; 219 /* erp related data */ 220 bool use_cts_prot; 221 bool use_short_preamble; 222 u16 beacon_int; 223 u16 assoc_capability; 224 u64 timestamp; 225 /* ht related data */ 226 bool assoc_ht; 227 struct ieee80211_ht_info *ht_conf; 228 struct ieee80211_ht_bss_info *ht_bss_conf; 229 }; 230 231 /** 232 * enum mac80211_tx_control_flags - flags to describe Tx configuration for 233 * the Tx frame 234 * 235 * These flags are used with the @flags member of &ieee80211_tx_control 236 * 237 * @IEEE80211_TXCTL_REQ_TX_STATUS: request TX status callback for this frame. 238 * @IEEE80211_TXCTL_DO_NOT_ENCRYPT: send this frame without encryption; 239 * e.g., for EAPOL frame 240 * @IEEE80211_TXCTL_USE_RTS_CTS: use RTS-CTS before sending frame 241 * @IEEE80211_TXCTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 242 * for combined 802.11g / 802.11b networks) 243 * @IEEE80211_TXCTL_NO_ACK: tell the low level not to wait for an ack 244 * @IEEE80211_TXCTL_RATE_CTRL_PROBE 245 * @EEE80211_TXCTL_CLEAR_PS_FILT: clear powersave filter 246 * for destination station 247 * @IEEE80211_TXCTL_REQUEUE: 248 * @IEEE80211_TXCTL_FIRST_FRAGMENT: this is a first fragment of the frame 249 * @IEEE80211_TXCTL_LONG_RETRY_LIMIT: this frame should be send using the 250 * through set_retry_limit configured long 251 * retry value 252 * @IEEE80211_TXCTL_EAPOL_FRAME: internal to mac80211 253 * @IEEE80211_TXCTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 254 * @IEEE80211_TXCTL_AMPDU: this frame should be sent as part of an A-MPDU 255 * @IEEE80211_TXCTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 256 * of streams when this flag is on can be extracted 257 * from antenna_sel_tx, so if 1 antenna is marked 258 * use SISO, 2 antennas marked use MIMO, n antennas 259 * marked use MIMO_n. 260 * @IEEE80211_TXCTL_GREEN_FIELD: use green field protection for this frame 261 * @IEEE80211_TXCTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 262 * @IEEE80211_TXCTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 263 * @IEEE80211_TXCTL_SHORT_GI: send this frame using short guard interval 264 */ 265 enum mac80211_tx_control_flags { 266 IEEE80211_TXCTL_REQ_TX_STATUS = (1<<0), 267 IEEE80211_TXCTL_DO_NOT_ENCRYPT = (1<<1), 268 IEEE80211_TXCTL_USE_RTS_CTS = (1<<2), 269 IEEE80211_TXCTL_USE_CTS_PROTECT = (1<<3), 270 IEEE80211_TXCTL_NO_ACK = (1<<4), 271 IEEE80211_TXCTL_RATE_CTRL_PROBE = (1<<5), 272 IEEE80211_TXCTL_CLEAR_PS_FILT = (1<<6), 273 IEEE80211_TXCTL_REQUEUE = (1<<7), 274 IEEE80211_TXCTL_FIRST_FRAGMENT = (1<<8), 275 IEEE80211_TXCTL_SHORT_PREAMBLE = (1<<9), 276 IEEE80211_TXCTL_LONG_RETRY_LIMIT = (1<<10), 277 IEEE80211_TXCTL_EAPOL_FRAME = (1<<11), 278 IEEE80211_TXCTL_SEND_AFTER_DTIM = (1<<12), 279 IEEE80211_TXCTL_AMPDU = (1<<13), 280 IEEE80211_TXCTL_OFDM_HT = (1<<14), 281 IEEE80211_TXCTL_GREEN_FIELD = (1<<15), 282 IEEE80211_TXCTL_40_MHZ_WIDTH = (1<<16), 283 IEEE80211_TXCTL_DUP_DATA = (1<<17), 284 IEEE80211_TXCTL_SHORT_GI = (1<<18), 285 }; 286 287 /* Transmit control fields. This data structure is passed to low-level driver 288 * with each TX frame. The low-level driver is responsible for configuring 289 * the hardware to use given values (depending on what is supported). */ 290 291 struct ieee80211_tx_control { 292 struct ieee80211_vif *vif; 293 struct ieee80211_rate *tx_rate; 294 295 /* Transmit rate for RTS/CTS frame */ 296 struct ieee80211_rate *rts_cts_rate; 297 298 /* retry rate for the last retries */ 299 struct ieee80211_rate *alt_retry_rate; 300 301 u32 flags; /* tx control flags defined above */ 302 u8 key_idx; /* keyidx from hw->set_key(), undefined if 303 * IEEE80211_TXCTL_DO_NOT_ENCRYPT is set */ 304 u8 retry_limit; /* 1 = only first attempt, 2 = one retry, .. 305 * This could be used when set_retry_limit 306 * is not implemented by the driver */ 307 u8 antenna_sel_tx; /* 0 = default/diversity, otherwise bit 308 * position represents antenna number used */ 309 u8 icv_len; /* length of the ICV/MIC field in octets */ 310 u8 iv_len; /* length of the IV field in octets */ 311 u8 queue; /* hardware queue to use for this frame; 312 * 0 = highest, hw->queues-1 = lowest */ 313 u16 aid; /* Station AID */ 314 int type; /* internal */ 315 }; 316 317 318 /** 319 * enum mac80211_rx_flags - receive flags 320 * 321 * These flags are used with the @flag member of &struct ieee80211_rx_status. 322 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 323 * Use together with %RX_FLAG_MMIC_STRIPPED. 324 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 325 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 326 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 327 * verification has been done by the hardware. 328 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 329 * If this flag is set, the stack cannot do any replay detection 330 * hence the driver or hardware will have to do that. 331 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 332 * the frame. 333 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 334 * the frame. 335 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 336 * is valid. This is useful in monitor mode and necessary for beacon frames 337 * to enable IBSS merging. 338 */ 339 enum mac80211_rx_flags { 340 RX_FLAG_MMIC_ERROR = 1<<0, 341 RX_FLAG_DECRYPTED = 1<<1, 342 RX_FLAG_RADIOTAP = 1<<2, 343 RX_FLAG_MMIC_STRIPPED = 1<<3, 344 RX_FLAG_IV_STRIPPED = 1<<4, 345 RX_FLAG_FAILED_FCS_CRC = 1<<5, 346 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 347 RX_FLAG_TSFT = 1<<7, 348 }; 349 350 /** 351 * struct ieee80211_rx_status - receive status 352 * 353 * The low-level driver should provide this information (the subset 354 * supported by hardware) to the 802.11 code with each received 355 * frame. 356 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 357 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 358 * @band: the active band when this frame was received 359 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 360 * @ssi: signal strength when receiving this frame 361 * @signal: used as 'qual' in statistics reporting 362 * @noise: PHY noise when receiving this frame 363 * @antenna: antenna used 364 * @rate_idx: index of data rate into band's supported rates 365 * @flag: %RX_FLAG_* 366 */ 367 struct ieee80211_rx_status { 368 u64 mactime; 369 enum ieee80211_band band; 370 int freq; 371 int ssi; 372 int signal; 373 int noise; 374 int antenna; 375 int rate_idx; 376 int flag; 377 }; 378 379 /** 380 * enum ieee80211_tx_status_flags - transmit status flags 381 * 382 * Status flags to indicate various transmit conditions. 383 * 384 * @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted 385 * because the destination STA was in powersave mode. 386 * @IEEE80211_TX_STATUS_ACK: Frame was acknowledged 387 * @IEEE80211_TX_STATUS_AMPDU: The frame was aggregated, so status 388 * is for the whole aggregation. 389 */ 390 enum ieee80211_tx_status_flags { 391 IEEE80211_TX_STATUS_TX_FILTERED = 1<<0, 392 IEEE80211_TX_STATUS_ACK = 1<<1, 393 IEEE80211_TX_STATUS_AMPDU = 1<<2, 394 }; 395 396 /** 397 * struct ieee80211_tx_status - transmit status 398 * 399 * As much information as possible should be provided for each transmitted 400 * frame with ieee80211_tx_status(). 401 * 402 * @control: a copy of the &struct ieee80211_tx_control passed to the driver 403 * in the tx() callback. 404 * @flags: transmit status flags, defined above 405 * @retry_count: number of retries 406 * @excessive_retries: set to 1 if the frame was retried many times 407 * but not acknowledged 408 * @ampdu_ack_len: number of aggregated frames. 409 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 410 * @ampdu_ack_map: block ack bit map for the aggregation. 411 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 412 * @ack_signal: signal strength of the ACK frame 413 * @queue_length: ?? REMOVE 414 * @queue_number: ?? REMOVE 415 */ 416 struct ieee80211_tx_status { 417 struct ieee80211_tx_control control; 418 u8 flags; 419 u8 retry_count; 420 bool excessive_retries; 421 u8 ampdu_ack_len; 422 u64 ampdu_ack_map; 423 int ack_signal; 424 int queue_length; 425 int queue_number; 426 }; 427 428 /** 429 * enum ieee80211_conf_flags - configuration flags 430 * 431 * Flags to define PHY configuration options 432 * 433 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 434 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 435 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 436 */ 437 enum ieee80211_conf_flags { 438 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 439 IEEE80211_CONF_RADIOTAP = (1<<1), 440 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 441 }; 442 443 /** 444 * struct ieee80211_conf - configuration of the device 445 * 446 * This struct indicates how the driver shall configure the hardware. 447 * 448 * @radio_enabled: when zero, driver is required to switch off the radio. 449 * TODO make a flag 450 * @beacon_int: beacon interval (TODO make interface config) 451 * @flags: configuration flags defined above 452 * @power_level: requested transmit power (in dBm) 453 * @max_antenna_gain: maximum antenna gain (in dBi) 454 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 455 * 1/2: antenna 0/1 456 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 457 * @ht_conf: describes current self configuration of 802.11n HT capabilies 458 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 459 * @channel: the channel to tune to 460 */ 461 struct ieee80211_conf { 462 int radio_enabled; 463 464 int beacon_int; 465 u32 flags; 466 int power_level; 467 int max_antenna_gain; 468 u8 antenna_sel_tx; 469 u8 antenna_sel_rx; 470 471 struct ieee80211_channel *channel; 472 473 struct ieee80211_ht_info ht_conf; 474 struct ieee80211_ht_bss_info ht_bss_conf; 475 }; 476 477 /** 478 * enum ieee80211_if_types - types of 802.11 network interfaces 479 * 480 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 481 * by mac80211 itself 482 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 483 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 484 * daemon. Drivers should never see this type. 485 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 486 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 487 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 488 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 489 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 490 * will never see this type. 491 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 492 */ 493 enum ieee80211_if_types { 494 IEEE80211_IF_TYPE_INVALID, 495 IEEE80211_IF_TYPE_AP, 496 IEEE80211_IF_TYPE_STA, 497 IEEE80211_IF_TYPE_IBSS, 498 IEEE80211_IF_TYPE_MESH_POINT, 499 IEEE80211_IF_TYPE_MNTR, 500 IEEE80211_IF_TYPE_WDS, 501 IEEE80211_IF_TYPE_VLAN, 502 }; 503 504 /** 505 * struct ieee80211_vif - per-interface data 506 * 507 * Data in this structure is continually present for driver 508 * use during the life of a virtual interface. 509 * 510 * @type: type of this virtual interface 511 * @drv_priv: data area for driver use, will always be aligned to 512 * sizeof(void *). 513 */ 514 struct ieee80211_vif { 515 enum ieee80211_if_types type; 516 /* must be last */ 517 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 518 }; 519 520 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 521 { 522 #ifdef CONFIG_MAC80211_MESH 523 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 524 #endif 525 return false; 526 } 527 528 /** 529 * struct ieee80211_if_init_conf - initial configuration of an interface 530 * 531 * @vif: pointer to a driver-use per-interface structure. The pointer 532 * itself is also used for various functions including 533 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 534 * @type: one of &enum ieee80211_if_types constants. Determines the type of 535 * added/removed interface. 536 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 537 * until the interface is removed (i.e. it cannot be used after 538 * remove_interface() callback was called for this interface). 539 * 540 * This structure is used in add_interface() and remove_interface() 541 * callbacks of &struct ieee80211_hw. 542 * 543 * When you allow multiple interfaces to be added to your PHY, take care 544 * that the hardware can actually handle multiple MAC addresses. However, 545 * also take care that when there's no interface left with mac_addr != %NULL 546 * you remove the MAC address from the device to avoid acknowledging packets 547 * in pure monitor mode. 548 */ 549 struct ieee80211_if_init_conf { 550 enum ieee80211_if_types type; 551 struct ieee80211_vif *vif; 552 void *mac_addr; 553 }; 554 555 /** 556 * struct ieee80211_if_conf - configuration of an interface 557 * 558 * @type: type of the interface. This is always the same as was specified in 559 * &struct ieee80211_if_init_conf. The type of an interface never changes 560 * during the life of the interface; this field is present only for 561 * convenience. 562 * @bssid: BSSID of the network we are associated to/creating. 563 * @ssid: used (together with @ssid_len) by drivers for hardware that 564 * generate beacons independently. The pointer is valid only during the 565 * config_interface() call, so copy the value somewhere if you need 566 * it. 567 * @ssid_len: length of the @ssid field. 568 * @beacon: beacon template. Valid only if @host_gen_beacon_template in 569 * &struct ieee80211_hw is set. The driver is responsible of freeing 570 * the sk_buff. 571 * @beacon_control: tx_control for the beacon template, this field is only 572 * valid when the @beacon field was set. 573 * 574 * This structure is passed to the config_interface() callback of 575 * &struct ieee80211_hw. 576 */ 577 struct ieee80211_if_conf { 578 int type; 579 u8 *bssid; 580 u8 *ssid; 581 size_t ssid_len; 582 struct sk_buff *beacon; 583 struct ieee80211_tx_control *beacon_control; 584 }; 585 586 /** 587 * enum ieee80211_key_alg - key algorithm 588 * @ALG_WEP: WEP40 or WEP104 589 * @ALG_TKIP: TKIP 590 * @ALG_CCMP: CCMP (AES) 591 */ 592 enum ieee80211_key_alg { 593 ALG_WEP, 594 ALG_TKIP, 595 ALG_CCMP, 596 }; 597 598 599 /** 600 * enum ieee80211_key_flags - key flags 601 * 602 * These flags are used for communication about keys between the driver 603 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 604 * 605 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 606 * that the STA this key will be used with could be using QoS. 607 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 608 * driver to indicate that it requires IV generation for this 609 * particular key. 610 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 611 * the driver for a TKIP key if it requires Michael MIC 612 * generation in software. 613 */ 614 enum ieee80211_key_flags { 615 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 616 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 617 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 618 }; 619 620 /** 621 * struct ieee80211_key_conf - key information 622 * 623 * This key information is given by mac80211 to the driver by 624 * the set_key() callback in &struct ieee80211_ops. 625 * 626 * @hw_key_idx: To be set by the driver, this is the key index the driver 627 * wants to be given when a frame is transmitted and needs to be 628 * encrypted in hardware. 629 * @alg: The key algorithm. 630 * @flags: key flags, see &enum ieee80211_key_flags. 631 * @keyidx: the key index (0-3) 632 * @keylen: key material length 633 * @key: key material 634 */ 635 struct ieee80211_key_conf { 636 enum ieee80211_key_alg alg; 637 u8 hw_key_idx; 638 u8 flags; 639 s8 keyidx; 640 u8 keylen; 641 u8 key[0]; 642 }; 643 644 /** 645 * enum set_key_cmd - key command 646 * 647 * Used with the set_key() callback in &struct ieee80211_ops, this 648 * indicates whether a key is being removed or added. 649 * 650 * @SET_KEY: a key is set 651 * @DISABLE_KEY: a key must be disabled 652 */ 653 enum set_key_cmd { 654 SET_KEY, DISABLE_KEY, 655 }; 656 657 /** 658 * enum sta_notify_cmd - sta notify command 659 * 660 * Used with the sta_notify() callback in &struct ieee80211_ops, this 661 * indicates addition and removal of a station to station table 662 * 663 * @STA_NOTIFY_ADD: a station was added to the station table 664 * @STA_NOTIFY_REMOVE: a station being removed from the station table 665 */ 666 enum sta_notify_cmd { 667 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 668 }; 669 670 /** 671 * enum ieee80211_tkip_key_type - get tkip key 672 * 673 * Used by drivers which need to get a tkip key for skb. Some drivers need a 674 * phase 1 key, others need a phase 2 key. A single function allows the driver 675 * to get the key, this enum indicates what type of key is required. 676 * 677 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 678 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 679 */ 680 enum ieee80211_tkip_key_type { 681 IEEE80211_TKIP_P1_KEY, 682 IEEE80211_TKIP_P2_KEY, 683 }; 684 685 /** 686 * enum ieee80211_hw_flags - hardware flags 687 * 688 * These flags are used to indicate hardware capabilities to 689 * the stack. Generally, flags here should have their meaning 690 * done in a way that the simplest hardware doesn't need setting 691 * any particular flags. There are some exceptions to this rule, 692 * however, so you are advised to review these flags carefully. 693 * 694 * @IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE: 695 * The device only needs to be supplied with a beacon template. 696 * If you need the host to generate each beacon then don't use 697 * this flag and call ieee80211_beacon_get() when you need the 698 * next beacon frame. Note that if you set this flag, you must 699 * implement the set_tim() callback for powersave mode to work 700 * properly. 701 * This flag is only relevant for access-point mode. 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 enum ieee80211_hw_flags { 726 IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE = 1<<0, 727 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 728 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 729 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 730 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 731 }; 732 733 /** 734 * struct ieee80211_hw - hardware information and state 735 * 736 * This structure contains the configuration and hardware 737 * information for an 802.11 PHY. 738 * 739 * @wiphy: This points to the &struct wiphy allocated for this 740 * 802.11 PHY. You must fill in the @perm_addr and @dev 741 * members of this structure using SET_IEEE80211_DEV() 742 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 743 * bands (with channels, bitrates) are registered here. 744 * 745 * @conf: &struct ieee80211_conf, device configuration, don't use. 746 * 747 * @workqueue: single threaded workqueue available for driver use, 748 * allocated by mac80211 on registration and flushed on 749 * unregistration. 750 * 751 * @priv: pointer to private area that was allocated for driver use 752 * along with this structure. 753 * 754 * @flags: hardware flags, see &enum ieee80211_hw_flags. 755 * 756 * @extra_tx_headroom: headroom to reserve in each transmit skb 757 * for use by the driver (e.g. for transmit headers.) 758 * 759 * @channel_change_time: time (in microseconds) it takes to change channels. 760 * 761 * @max_rssi: Maximum value for ssi in RX information, use 762 * negative numbers for dBm and 0 to indicate no support. 763 * 764 * @max_signal: like @max_rssi, but for the signal value. 765 * 766 * @max_noise: like @max_rssi, but for the noise value. 767 * 768 * @queues: number of available hardware transmit queues for 769 * data packets. WMM/QoS requires at least four. 770 * 771 * @rate_control_algorithm: rate control algorithm for this hardware. 772 * If unset (NULL), the default algorithm will be used. Must be 773 * set before calling ieee80211_register_hw(). 774 * 775 * @vif_data_size: size (in bytes) of the drv_priv data area 776 * within &struct ieee80211_vif. 777 */ 778 struct ieee80211_hw { 779 struct ieee80211_conf conf; 780 struct wiphy *wiphy; 781 struct workqueue_struct *workqueue; 782 const char *rate_control_algorithm; 783 void *priv; 784 u32 flags; 785 unsigned int extra_tx_headroom; 786 int channel_change_time; 787 int vif_data_size; 788 u8 queues; 789 s8 max_rssi; 790 s8 max_signal; 791 s8 max_noise; 792 }; 793 794 /** 795 * SET_IEEE80211_DEV - set device for 802.11 hardware 796 * 797 * @hw: the &struct ieee80211_hw to set the device for 798 * @dev: the &struct device of this 802.11 device 799 */ 800 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 801 { 802 set_wiphy_dev(hw->wiphy, dev); 803 } 804 805 /** 806 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 807 * 808 * @hw: the &struct ieee80211_hw to set the MAC address for 809 * @addr: the address to set 810 */ 811 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 812 { 813 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 814 } 815 816 /** 817 * DOC: Hardware crypto acceleration 818 * 819 * mac80211 is capable of taking advantage of many hardware 820 * acceleration designs for encryption and decryption operations. 821 * 822 * The set_key() callback in the &struct ieee80211_ops for a given 823 * device is called to enable hardware acceleration of encryption and 824 * decryption. The callback takes an @address parameter that will be 825 * the broadcast address for default keys, the other station's hardware 826 * address for individual keys or the zero address for keys that will 827 * be used only for transmission. 828 * Multiple transmission keys with the same key index may be used when 829 * VLANs are configured for an access point. 830 * 831 * The @local_address parameter will always be set to our own address, 832 * this is only relevant if you support multiple local addresses. 833 * 834 * When transmitting, the TX control data will use the @hw_key_idx 835 * selected by the driver by modifying the &struct ieee80211_key_conf 836 * pointed to by the @key parameter to the set_key() function. 837 * 838 * The set_key() call for the %SET_KEY command should return 0 if 839 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 840 * added; if you return 0 then hw_key_idx must be assigned to the 841 * hardware key index, you are free to use the full u8 range. 842 * 843 * When the cmd is %DISABLE_KEY then it must succeed. 844 * 845 * Note that it is permissible to not decrypt a frame even if a key 846 * for it has been uploaded to hardware, the stack will not make any 847 * decision based on whether a key has been uploaded or not but rather 848 * based on the receive flags. 849 * 850 * The &struct ieee80211_key_conf structure pointed to by the @key 851 * parameter is guaranteed to be valid until another call to set_key() 852 * removes it, but it can only be used as a cookie to differentiate 853 * keys. 854 * 855 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 856 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 857 * handler. 858 * The update_tkip_key() call updates the driver with the new phase 1 key. 859 * This happens everytime the iv16 wraps around (every 65536 packets). The 860 * set_key() call will happen only once for each key (unless the AP did 861 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 862 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 863 * handler is software decryption with wrap around of iv16. 864 */ 865 866 /** 867 * DOC: Frame filtering 868 * 869 * mac80211 requires to see many management frames for proper 870 * operation, and users may want to see many more frames when 871 * in monitor mode. However, for best CPU usage and power consumption, 872 * having as few frames as possible percolate through the stack is 873 * desirable. Hence, the hardware should filter as much as possible. 874 * 875 * To achieve this, mac80211 uses filter flags (see below) to tell 876 * the driver's configure_filter() function which frames should be 877 * passed to mac80211 and which should be filtered out. 878 * 879 * The configure_filter() callback is invoked with the parameters 880 * @mc_count and @mc_list for the combined multicast address list 881 * of all virtual interfaces, @changed_flags telling which flags 882 * were changed and @total_flags with the new flag states. 883 * 884 * If your device has no multicast address filters your driver will 885 * need to check both the %FIF_ALLMULTI flag and the @mc_count 886 * parameter to see whether multicast frames should be accepted 887 * or dropped. 888 * 889 * All unsupported flags in @total_flags must be cleared. 890 * Hardware does not support a flag if it is incapable of _passing_ 891 * the frame to the stack. Otherwise the driver must ignore 892 * the flag, but not clear it. 893 * You must _only_ clear the flag (announce no support for the 894 * flag to mac80211) if you are not able to pass the packet type 895 * to the stack (so the hardware always filters it). 896 * So for example, you should clear @FIF_CONTROL, if your hardware 897 * always filters control frames. If your hardware always passes 898 * control frames to the kernel and is incapable of filtering them, 899 * you do _not_ clear the @FIF_CONTROL flag. 900 * This rule applies to all other FIF flags as well. 901 */ 902 903 /** 904 * enum ieee80211_filter_flags - hardware filter flags 905 * 906 * These flags determine what the filter in hardware should be 907 * programmed to let through and what should not be passed to the 908 * stack. It is always safe to pass more frames than requested, 909 * but this has negative impact on power consumption. 910 * 911 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 912 * think of the BSS as your network segment and then this corresponds 913 * to the regular ethernet device promiscuous mode. 914 * 915 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 916 * by the user or if the hardware is not capable of filtering by 917 * multicast address. 918 * 919 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 920 * %RX_FLAG_FAILED_FCS_CRC for them) 921 * 922 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 923 * the %RX_FLAG_FAILED_PLCP_CRC for them 924 * 925 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 926 * to the hardware that it should not filter beacons or probe responses 927 * by BSSID. Filtering them can greatly reduce the amount of processing 928 * mac80211 needs to do and the amount of CPU wakeups, so you should 929 * honour this flag if possible. 930 * 931 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 932 * only those addressed to this station 933 * 934 * @FIF_OTHER_BSS: pass frames destined to other BSSes 935 */ 936 enum ieee80211_filter_flags { 937 FIF_PROMISC_IN_BSS = 1<<0, 938 FIF_ALLMULTI = 1<<1, 939 FIF_FCSFAIL = 1<<2, 940 FIF_PLCPFAIL = 1<<3, 941 FIF_BCN_PRBRESP_PROMISC = 1<<4, 942 FIF_CONTROL = 1<<5, 943 FIF_OTHER_BSS = 1<<6, 944 }; 945 946 /** 947 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 948 * 949 * These flags are used with the ampdu_action() callback in 950 * &struct ieee80211_ops to indicate which action is needed. 951 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 952 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 953 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 954 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 955 */ 956 enum ieee80211_ampdu_mlme_action { 957 IEEE80211_AMPDU_RX_START, 958 IEEE80211_AMPDU_RX_STOP, 959 IEEE80211_AMPDU_TX_START, 960 IEEE80211_AMPDU_TX_STOP, 961 }; 962 963 /** 964 * struct ieee80211_ops - callbacks from mac80211 to the driver 965 * 966 * This structure contains various callbacks that the driver may 967 * handle or, in some cases, must handle, for example to configure 968 * the hardware to a new channel or to transmit a frame. 969 * 970 * @tx: Handler that 802.11 module calls for each transmitted frame. 971 * skb contains the buffer starting from the IEEE 802.11 header. 972 * The low-level driver should send the frame out based on 973 * configuration in the TX control data. Must be implemented and 974 * atomic. 975 * 976 * @start: Called before the first netdevice attached to the hardware 977 * is enabled. This should turn on the hardware and must turn on 978 * frame reception (for possibly enabled monitor interfaces.) 979 * Returns negative error codes, these may be seen in userspace, 980 * or zero. 981 * When the device is started it should not have a MAC address 982 * to avoid acknowledging frames before a non-monitor device 983 * is added. 984 * Must be implemented. 985 * 986 * @stop: Called after last netdevice attached to the hardware 987 * is disabled. This should turn off the hardware (at least 988 * it must turn off frame reception.) 989 * May be called right after add_interface if that rejects 990 * an interface. 991 * Must be implemented. 992 * 993 * @add_interface: Called when a netdevice attached to the hardware is 994 * enabled. Because it is not called for monitor mode devices, @open 995 * and @stop must be implemented. 996 * The driver should perform any initialization it needs before 997 * the device can be enabled. The initial configuration for the 998 * interface is given in the conf parameter. 999 * The callback may refuse to add an interface by returning a 1000 * negative error code (which will be seen in userspace.) 1001 * Must be implemented. 1002 * 1003 * @remove_interface: Notifies a driver that an interface is going down. 1004 * The @stop callback is called after this if it is the last interface 1005 * and no monitor interfaces are present. 1006 * When all interfaces are removed, the MAC address in the hardware 1007 * must be cleared so the device no longer acknowledges packets, 1008 * the mac_addr member of the conf structure is, however, set to the 1009 * MAC address of the device going away. 1010 * Hence, this callback must be implemented. 1011 * 1012 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1013 * function to change hardware configuration, e.g., channel. 1014 * 1015 * @config_interface: Handler for configuration requests related to interfaces 1016 * (e.g. BSSID changes.) 1017 * 1018 * @bss_info_changed: Handler for configuration requests related to BSS 1019 * parameters that may vary during BSS's lifespan, and may affect low 1020 * level driver (e.g. assoc/disassoc status, erp parameters). 1021 * This function should not be used if no BSS has been set, unless 1022 * for association indication. The @changed parameter indicates which 1023 * of the bss parameters has changed when a call is made. 1024 * 1025 * @configure_filter: Configure the device's RX filter. 1026 * See the section "Frame filtering" for more information. 1027 * This callback must be implemented and atomic. 1028 * 1029 * @set_tim: Set TIM bit. If the hardware/firmware takes care of beacon 1030 * generation (that is, %IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE is set) 1031 * mac80211 calls this function when a TIM bit must be set or cleared 1032 * for a given AID. Must be atomic. 1033 * 1034 * @set_key: See the section "Hardware crypto acceleration" 1035 * This callback can sleep, and is only called between add_interface 1036 * and remove_interface calls, i.e. while the interface with the 1037 * given local_address is enabled. 1038 * 1039 * @update_tkip_key: See the section "Hardware crypto acceleration" 1040 * This callback will be called in the context of Rx. Called for drivers 1041 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1042 * 1043 * @hw_scan: Ask the hardware to service the scan request, no need to start 1044 * the scan state machine in stack. The scan must honour the channel 1045 * configuration done by the regulatory agent in the wiphy's registered 1046 * bands. 1047 * 1048 * @get_stats: return low-level statistics 1049 * 1050 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1051 * callback should be provided to read the TKIP transmit IVs (both IV32 1052 * and IV16) for the given key from hardware. 1053 * 1054 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1055 * 1056 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1057 * the device does fragmentation by itself; if this method is assigned then 1058 * the stack will not do fragmentation. 1059 * 1060 * @set_retry_limit: Configuration of retry limits (if device needs it) 1061 * 1062 * @sta_notify: Notifies low level driver about addition or removal 1063 * of assocaited station or AP. 1064 * 1065 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1066 * bursting) for a hardware TX queue. The @queue parameter uses the 1067 * %IEEE80211_TX_QUEUE_* constants. Must be atomic. 1068 * 1069 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1070 * to get number of currently queued packets (queue length), maximum queue 1071 * size (limit), and total number of packets sent using each TX queue 1072 * (count). This information is used for WMM to find out which TX 1073 * queues have room for more packets and by hostapd to provide 1074 * statistics about the current queueing state to external programs. 1075 * 1076 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1077 * this is only used for IBSS mode debugging and, as such, is not a 1078 * required function. Must be atomic. 1079 * 1080 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1081 * with other STAs in the IBSS. This is only used in IBSS mode. This 1082 * function is optional if the firmware/hardware takes full care of 1083 * TSF synchronization. 1084 * 1085 * @beacon_update: Setup beacon data for IBSS beacons. Unlike access point, 1086 * IBSS uses a fixed beacon frame which is configured using this 1087 * function. 1088 * If the driver returns success (0) from this callback, it owns 1089 * the skb. That means the driver is responsible to kfree_skb() it. 1090 * The control structure is not dynamically allocated. That means the 1091 * driver does not own the pointer and if it needs it somewhere 1092 * outside of the context of this function, it must copy it 1093 * somewhere else. 1094 * This handler is required only for IBSS mode. 1095 * 1096 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1097 * This is needed only for IBSS mode and the result of this function is 1098 * used to determine whether to reply to Probe Requests. 1099 * 1100 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1101 * 1102 * @ampdu_action: Perform a certain A-MPDU action 1103 * The RA/TID combination determines the destination and TID we want 1104 * the ampdu action to be performed for. The action is defined through 1105 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1106 * is the first frame we expect to perform the action on. notice 1107 * that TX/RX_STOP can pass NULL for this parameter. 1108 */ 1109 struct ieee80211_ops { 1110 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb, 1111 struct ieee80211_tx_control *control); 1112 int (*start)(struct ieee80211_hw *hw); 1113 void (*stop)(struct ieee80211_hw *hw); 1114 int (*add_interface)(struct ieee80211_hw *hw, 1115 struct ieee80211_if_init_conf *conf); 1116 void (*remove_interface)(struct ieee80211_hw *hw, 1117 struct ieee80211_if_init_conf *conf); 1118 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1119 int (*config_interface)(struct ieee80211_hw *hw, 1120 struct ieee80211_vif *vif, 1121 struct ieee80211_if_conf *conf); 1122 void (*bss_info_changed)(struct ieee80211_hw *hw, 1123 struct ieee80211_vif *vif, 1124 struct ieee80211_bss_conf *info, 1125 u32 changed); 1126 void (*configure_filter)(struct ieee80211_hw *hw, 1127 unsigned int changed_flags, 1128 unsigned int *total_flags, 1129 int mc_count, struct dev_addr_list *mc_list); 1130 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1131 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1132 const u8 *local_address, const u8 *address, 1133 struct ieee80211_key_conf *key); 1134 void (*update_tkip_key)(struct ieee80211_hw *hw, 1135 struct ieee80211_key_conf *conf, const u8 *address, 1136 u32 iv32, u16 *phase1key); 1137 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1138 int (*get_stats)(struct ieee80211_hw *hw, 1139 struct ieee80211_low_level_stats *stats); 1140 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1141 u32 *iv32, u16 *iv16); 1142 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1143 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1144 int (*set_retry_limit)(struct ieee80211_hw *hw, 1145 u32 short_retry, u32 long_retr); 1146 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1147 enum sta_notify_cmd, const u8 *addr); 1148 int (*conf_tx)(struct ieee80211_hw *hw, int queue, 1149 const struct ieee80211_tx_queue_params *params); 1150 int (*get_tx_stats)(struct ieee80211_hw *hw, 1151 struct ieee80211_tx_queue_stats *stats); 1152 u64 (*get_tsf)(struct ieee80211_hw *hw); 1153 void (*reset_tsf)(struct ieee80211_hw *hw); 1154 int (*beacon_update)(struct ieee80211_hw *hw, 1155 struct sk_buff *skb, 1156 struct ieee80211_tx_control *control); 1157 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1158 int (*ampdu_action)(struct ieee80211_hw *hw, 1159 enum ieee80211_ampdu_mlme_action action, 1160 const u8 *addr, u16 tid, u16 *ssn); 1161 }; 1162 1163 /** 1164 * ieee80211_alloc_hw - Allocate a new hardware device 1165 * 1166 * This must be called once for each hardware device. The returned pointer 1167 * must be used to refer to this device when calling other functions. 1168 * mac80211 allocates a private data area for the driver pointed to by 1169 * @priv in &struct ieee80211_hw, the size of this area is given as 1170 * @priv_data_len. 1171 * 1172 * @priv_data_len: length of private data 1173 * @ops: callbacks for this device 1174 */ 1175 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1176 const struct ieee80211_ops *ops); 1177 1178 /** 1179 * ieee80211_register_hw - Register hardware device 1180 * 1181 * You must call this function before any other functions in 1182 * mac80211. Note that before a hardware can be registered, you 1183 * need to fill the contained wiphy's information. 1184 * 1185 * @hw: the device to register as returned by ieee80211_alloc_hw() 1186 */ 1187 int ieee80211_register_hw(struct ieee80211_hw *hw); 1188 1189 #ifdef CONFIG_MAC80211_LEDS 1190 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1191 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1192 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1193 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1194 #endif 1195 /** 1196 * ieee80211_get_tx_led_name - get name of TX LED 1197 * 1198 * mac80211 creates a transmit LED trigger for each wireless hardware 1199 * that can be used to drive LEDs if your driver registers a LED device. 1200 * This function returns the name (or %NULL if not configured for LEDs) 1201 * of the trigger so you can automatically link the LED device. 1202 * 1203 * @hw: the hardware to get the LED trigger name for 1204 */ 1205 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1206 { 1207 #ifdef CONFIG_MAC80211_LEDS 1208 return __ieee80211_get_tx_led_name(hw); 1209 #else 1210 return NULL; 1211 #endif 1212 } 1213 1214 /** 1215 * ieee80211_get_rx_led_name - get name of RX LED 1216 * 1217 * mac80211 creates a receive LED trigger for each wireless hardware 1218 * that can be used to drive LEDs if your driver registers a LED device. 1219 * This function returns the name (or %NULL if not configured for LEDs) 1220 * of the trigger so you can automatically link the LED device. 1221 * 1222 * @hw: the hardware to get the LED trigger name for 1223 */ 1224 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1225 { 1226 #ifdef CONFIG_MAC80211_LEDS 1227 return __ieee80211_get_rx_led_name(hw); 1228 #else 1229 return NULL; 1230 #endif 1231 } 1232 1233 /** 1234 * ieee80211_get_assoc_led_name - get name of association LED 1235 * 1236 * mac80211 creates a association LED trigger for each wireless hardware 1237 * that can be used to drive LEDs if your driver registers a LED device. 1238 * This function returns the name (or %NULL if not configured for LEDs) 1239 * of the trigger so you can automatically link the LED device. 1240 * 1241 * @hw: the hardware to get the LED trigger name for 1242 */ 1243 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1244 { 1245 #ifdef CONFIG_MAC80211_LEDS 1246 return __ieee80211_get_assoc_led_name(hw); 1247 #else 1248 return NULL; 1249 #endif 1250 } 1251 1252 /** 1253 * ieee80211_get_radio_led_name - get name of radio LED 1254 * 1255 * mac80211 creates a radio change LED trigger for each wireless hardware 1256 * that can be used to drive LEDs if your driver registers a LED device. 1257 * This function returns the name (or %NULL if not configured for LEDs) 1258 * of the trigger so you can automatically link the LED device. 1259 * 1260 * @hw: the hardware to get the LED trigger name for 1261 */ 1262 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1263 { 1264 #ifdef CONFIG_MAC80211_LEDS 1265 return __ieee80211_get_radio_led_name(hw); 1266 #else 1267 return NULL; 1268 #endif 1269 } 1270 1271 /** 1272 * ieee80211_unregister_hw - Unregister a hardware device 1273 * 1274 * This function instructs mac80211 to free allocated resources 1275 * and unregister netdevices from the networking subsystem. 1276 * 1277 * @hw: the hardware to unregister 1278 */ 1279 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1280 1281 /** 1282 * ieee80211_free_hw - free hardware descriptor 1283 * 1284 * This function frees everything that was allocated, including the 1285 * private data for the driver. You must call ieee80211_unregister_hw() 1286 * before calling this function 1287 * 1288 * @hw: the hardware to free 1289 */ 1290 void ieee80211_free_hw(struct ieee80211_hw *hw); 1291 1292 /* trick to avoid symbol clashes with the ieee80211 subsystem */ 1293 void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1294 struct ieee80211_rx_status *status); 1295 1296 /** 1297 * ieee80211_rx - receive frame 1298 * 1299 * Use this function to hand received frames to mac80211. The receive 1300 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1301 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1302 * 1303 * This function may not be called in IRQ context. Calls to this function 1304 * for a single hardware must be synchronized against each other. Calls 1305 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1306 * single hardware. 1307 * 1308 * @hw: the hardware this frame came in on 1309 * @skb: the buffer to receive, owned by mac80211 after this call 1310 * @status: status of this frame; the status pointer need not be valid 1311 * after this function returns 1312 */ 1313 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1314 struct ieee80211_rx_status *status) 1315 { 1316 __ieee80211_rx(hw, skb, status); 1317 } 1318 1319 /** 1320 * ieee80211_rx_irqsafe - receive frame 1321 * 1322 * Like ieee80211_rx() but can be called in IRQ context 1323 * (internally defers to a tasklet.) 1324 * 1325 * Calls to this function and ieee80211_rx() may not be mixed for a 1326 * single hardware. 1327 * 1328 * @hw: the hardware this frame came in on 1329 * @skb: the buffer to receive, owned by mac80211 after this call 1330 * @status: status of this frame; the status pointer need not be valid 1331 * after this function returns and is not freed by mac80211, 1332 * it is recommended that it points to a stack area 1333 */ 1334 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1335 struct sk_buff *skb, 1336 struct ieee80211_rx_status *status); 1337 1338 /** 1339 * ieee80211_tx_status - transmit status callback 1340 * 1341 * Call this function for all transmitted frames after they have been 1342 * transmitted. It is permissible to not call this function for 1343 * multicast frames but this can affect statistics. 1344 * 1345 * This function may not be called in IRQ context. Calls to this function 1346 * for a single hardware must be synchronized against each other. Calls 1347 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1348 * for a single hardware. 1349 * 1350 * @hw: the hardware the frame was transmitted by 1351 * @skb: the frame that was transmitted, owned by mac80211 after this call 1352 * @status: status information for this frame; the status pointer need not 1353 * be valid after this function returns and is not freed by mac80211, 1354 * it is recommended that it points to a stack area 1355 */ 1356 void ieee80211_tx_status(struct ieee80211_hw *hw, 1357 struct sk_buff *skb, 1358 struct ieee80211_tx_status *status); 1359 1360 /** 1361 * ieee80211_tx_status_irqsafe - irq-safe transmit status callback 1362 * 1363 * Like ieee80211_tx_status() but can be called in IRQ context 1364 * (internally defers to a tasklet.) 1365 * 1366 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1367 * single hardware. 1368 * 1369 * @hw: the hardware the frame was transmitted by 1370 * @skb: the frame that was transmitted, owned by mac80211 after this call 1371 * @status: status information for this frame; the status pointer need not 1372 * be valid after this function returns and is not freed by mac80211, 1373 * it is recommended that it points to a stack area 1374 */ 1375 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1376 struct sk_buff *skb, 1377 struct ieee80211_tx_status *status); 1378 1379 /** 1380 * ieee80211_beacon_get - beacon generation function 1381 * @hw: pointer obtained from ieee80211_alloc_hw(). 1382 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1383 * @control: will be filled with information needed to send this beacon. 1384 * 1385 * If the beacon frames are generated by the host system (i.e., not in 1386 * hardware/firmware), the low-level driver uses this function to receive 1387 * the next beacon frame from the 802.11 code. The low-level is responsible 1388 * for calling this function before beacon data is needed (e.g., based on 1389 * hardware interrupt). Returned skb is used only once and low-level driver 1390 * is responsible of freeing it. 1391 */ 1392 struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1393 struct ieee80211_vif *vif, 1394 struct ieee80211_tx_control *control); 1395 1396 /** 1397 * ieee80211_rts_get - RTS frame generation function 1398 * @hw: pointer obtained from ieee80211_alloc_hw(). 1399 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1400 * @frame: pointer to the frame that is going to be protected by the RTS. 1401 * @frame_len: the frame length (in octets). 1402 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1403 * @rts: The buffer where to store the RTS frame. 1404 * 1405 * If the RTS frames are generated by the host system (i.e., not in 1406 * hardware/firmware), the low-level driver uses this function to receive 1407 * the next RTS frame from the 802.11 code. The low-level is responsible 1408 * for calling this function before and RTS frame is needed. 1409 */ 1410 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1411 const void *frame, size_t frame_len, 1412 const struct ieee80211_tx_control *frame_txctl, 1413 struct ieee80211_rts *rts); 1414 1415 /** 1416 * ieee80211_rts_duration - Get the duration field for an RTS frame 1417 * @hw: pointer obtained from ieee80211_alloc_hw(). 1418 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1419 * @frame_len: the length of the frame that is going to be protected by the RTS. 1420 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1421 * 1422 * If the RTS is generated in firmware, but the host system must provide 1423 * the duration field, the low-level driver uses this function to receive 1424 * the duration field value in little-endian byteorder. 1425 */ 1426 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1427 struct ieee80211_vif *vif, size_t frame_len, 1428 const struct ieee80211_tx_control *frame_txctl); 1429 1430 /** 1431 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1432 * @hw: pointer obtained from ieee80211_alloc_hw(). 1433 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1434 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1435 * @frame_len: the frame length (in octets). 1436 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1437 * @cts: The buffer where to store the CTS-to-self frame. 1438 * 1439 * If the CTS-to-self 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 CTS-to-self frame from the 802.11 code. The low-level is responsible 1442 * for calling this function before and CTS-to-self frame is needed. 1443 */ 1444 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1445 struct ieee80211_vif *vif, 1446 const void *frame, size_t frame_len, 1447 const struct ieee80211_tx_control *frame_txctl, 1448 struct ieee80211_cts *cts); 1449 1450 /** 1451 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1452 * @hw: pointer obtained from ieee80211_alloc_hw(). 1453 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1454 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1455 * @frame_txctl: &struct ieee80211_tx_control of the frame. 1456 * 1457 * If the CTS-to-self is generated in firmware, but the host system must provide 1458 * the duration field, the low-level driver uses this function to receive 1459 * the duration field value in little-endian byteorder. 1460 */ 1461 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1462 struct ieee80211_vif *vif, 1463 size_t frame_len, 1464 const struct ieee80211_tx_control *frame_txctl); 1465 1466 /** 1467 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1468 * @hw: pointer obtained from ieee80211_alloc_hw(). 1469 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1470 * @frame_len: the length of the frame. 1471 * @rate: the rate at which the frame is going to be transmitted. 1472 * 1473 * Calculate the duration field of some generic frame, given its 1474 * length and transmission rate (in 100kbps). 1475 */ 1476 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1477 struct ieee80211_vif *vif, 1478 size_t frame_len, 1479 struct ieee80211_rate *rate); 1480 1481 /** 1482 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1483 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1484 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1485 * @control: will be filled with information needed to send returned frame. 1486 * 1487 * Function for accessing buffered broadcast and multicast frames. If 1488 * hardware/firmware does not implement buffering of broadcast/multicast 1489 * frames when power saving is used, 802.11 code buffers them in the host 1490 * memory. The low-level driver uses this function to fetch next buffered 1491 * frame. In most cases, this is used when generating beacon frame. This 1492 * function returns a pointer to the next buffered skb or NULL if no more 1493 * buffered frames are available. 1494 * 1495 * Note: buffered frames are returned only after DTIM beacon frame was 1496 * generated with ieee80211_beacon_get() and the low-level driver must thus 1497 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1498 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1499 * does not need to check for DTIM beacons separately and should be able to 1500 * use common code for all beacons. 1501 */ 1502 struct sk_buff * 1503 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1504 struct ieee80211_tx_control *control); 1505 1506 /** 1507 * ieee80211_get_hdrlen_from_skb - get header length from data 1508 * 1509 * Given an skb with a raw 802.11 header at the data pointer this function 1510 * returns the 802.11 header length in bytes (not including encryption 1511 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1512 * header the function returns 0. 1513 * 1514 * @skb: the frame 1515 */ 1516 int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1517 1518 /** 1519 * ieee80211_get_hdrlen - get header length from frame control 1520 * 1521 * This function returns the 802.11 header length in bytes (not including 1522 * encryption headers.) 1523 * 1524 * @fc: the frame control field (in CPU endianness) 1525 */ 1526 int ieee80211_get_hdrlen(u16 fc); 1527 1528 /** 1529 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1530 * 1531 * This function computes a TKIP rc4 key for an skb. It computes 1532 * a phase 1 key if needed (iv16 wraps around). This function is to 1533 * be used by drivers which can do HW encryption but need to compute 1534 * to phase 1/2 key in SW. 1535 * 1536 * @keyconf: the parameter passed with the set key 1537 * @skb: the skb for which the key is needed 1538 * @rc4key: a buffer to which the key will be written 1539 */ 1540 void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1541 struct sk_buff *skb, 1542 enum ieee80211_tkip_key_type type, u8 *key); 1543 /** 1544 * ieee80211_wake_queue - wake specific queue 1545 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1546 * @queue: queue number (counted from zero). 1547 * 1548 * Drivers should use this function instead of netif_wake_queue. 1549 */ 1550 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1551 1552 /** 1553 * ieee80211_stop_queue - stop specific queue 1554 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1555 * @queue: queue number (counted from zero). 1556 * 1557 * Drivers should use this function instead of netif_stop_queue. 1558 */ 1559 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1560 1561 /** 1562 * ieee80211_start_queues - start all queues 1563 * @hw: pointer to as obtained from ieee80211_alloc_hw(). 1564 * 1565 * Drivers should use this function instead of netif_start_queue. 1566 */ 1567 void ieee80211_start_queues(struct ieee80211_hw *hw); 1568 1569 /** 1570 * ieee80211_stop_queues - stop all queues 1571 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1572 * 1573 * Drivers should use this function instead of netif_stop_queue. 1574 */ 1575 void ieee80211_stop_queues(struct ieee80211_hw *hw); 1576 1577 /** 1578 * ieee80211_wake_queues - wake all queues 1579 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1580 * 1581 * Drivers should use this function instead of netif_wake_queue. 1582 */ 1583 void ieee80211_wake_queues(struct ieee80211_hw *hw); 1584 1585 /** 1586 * ieee80211_scan_completed - completed hardware scan 1587 * 1588 * When hardware scan offload is used (i.e. the hw_scan() callback is 1589 * assigned) this function needs to be called by the driver to notify 1590 * mac80211 that the scan finished. 1591 * 1592 * @hw: the hardware that finished the scan 1593 */ 1594 void ieee80211_scan_completed(struct ieee80211_hw *hw); 1595 1596 /** 1597 * ieee80211_iterate_active_interfaces - iterate active interfaces 1598 * 1599 * This function iterates over the interfaces associated with a given 1600 * hardware that are currently active and calls the callback for them. 1601 * 1602 * @hw: the hardware struct of which the interfaces should be iterated over 1603 * @iterator: the iterator function to call, cannot sleep 1604 * @data: first argument of the iterator function 1605 */ 1606 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1607 void (*iterator)(void *data, u8 *mac, 1608 struct ieee80211_vif *vif), 1609 void *data); 1610 1611 /** 1612 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 1613 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1614 * @ra: receiver address of the BA session recipient 1615 * @tid: the TID to BA on. 1616 * @return: success if addBA request was sent, failure otherwise 1617 * 1618 * Although mac80211/low level driver/user space application can estimate 1619 * the need to start aggregation on a certain RA/TID, the session level 1620 * will be managed by the mac80211. 1621 */ 1622 int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1623 1624 /** 1625 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1626 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1627 * @ra: receiver address of the BA session recipient. 1628 * @tid: the TID to BA on. 1629 * 1630 * This function must be called by low level driver once it has 1631 * finished with preparations for the BA session. 1632 */ 1633 void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1634 1635 /** 1636 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1637 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1638 * @ra: receiver address of the BA session recipient. 1639 * @tid: the TID to BA on. 1640 * 1641 * This function must be called by low level driver once it has 1642 * finished with preparations for the BA session. 1643 * This version of the function is irq safe. 1644 */ 1645 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1646 u16 tid); 1647 1648 /** 1649 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1650 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1651 * @ra: receiver address of the BA session recipient 1652 * @tid: the TID to stop BA. 1653 * @initiator: if indicates initiator DELBA frame will be sent. 1654 * @return: error if no sta with matching da found, success otherwise 1655 * 1656 * Although mac80211/low level driver/user space application can estimate 1657 * the need to stop aggregation on a certain RA/TID, the session level 1658 * will be managed by the mac80211. 1659 */ 1660 int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1661 u8 *ra, u16 tid, 1662 enum ieee80211_back_parties initiator); 1663 1664 /** 1665 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1666 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1667 * @ra: receiver address of the BA session recipient. 1668 * @tid: the desired TID to BA on. 1669 * 1670 * This function must be called by low level driver once it has 1671 * finished with preparations for the BA session tear down. 1672 */ 1673 void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1674 1675 /** 1676 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1677 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1678 * @ra: receiver address of the BA session recipient. 1679 * @tid: the desired TID to BA on. 1680 * 1681 * This function must be called by low level driver once it has 1682 * finished with preparations for the BA session tear down. 1683 * This version of the function is irq safe. 1684 */ 1685 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1686 u16 tid); 1687 1688 /** 1689 * ieee80211_notify_mac - low level driver notification 1690 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1691 * @notification_types: enum ieee80211_notification_types 1692 * 1693 * This function must be called by low level driver to inform mac80211 of 1694 * low level driver status change or force mac80211 to re-assoc for low 1695 * level driver internal error that require re-assoc. 1696 */ 1697 void ieee80211_notify_mac(struct ieee80211_hw *hw, 1698 enum ieee80211_notification_types notif_type); 1699 #endif /* MAC80211_H */ 1700