mac80211.h revision 96dd22ac06b0dbfb069fdf530c72046a941e9694
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#ifndef MAC80211_H 14#define MAC80211_H 15 16#include <linux/kernel.h> 17#include <linux/if_ether.h> 18#include <linux/skbuff.h> 19#include <linux/wireless.h> 20#include <linux/device.h> 21#include <linux/ieee80211.h> 22#include <net/wireless.h> 23#include <net/cfg80211.h> 24 25/** 26 * DOC: Introduction 27 * 28 * mac80211 is the Linux stack for 802.11 hardware that implements 29 * only partial functionality in hard- or firmware. This document 30 * defines the interface between mac80211 and low-level hardware 31 * drivers. 32 */ 33 34/** 35 * DOC: Calling mac80211 from interrupts 36 * 37 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 38 * called in hardware interrupt context. The low-level driver must not call any 39 * other functions in hardware interrupt context. If there is a need for such 40 * call, the low-level driver should first ACK the interrupt and perform the 41 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 42 * tasklet function. 43 * 44 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 45 * use the non-IRQ-safe functions! 46 */ 47 48/** 49 * DOC: Warning 50 * 51 * If you're reading this document and not the header file itself, it will 52 * be incomplete because not all documentation has been converted yet. 53 */ 54 55/** 56 * DOC: Frame format 57 * 58 * As a general rule, when frames are passed between mac80211 and the driver, 59 * they start with the IEEE 802.11 header and include the same octets that are 60 * sent over the air except for the FCS which should be calculated by the 61 * hardware. 62 * 63 * There are, however, various exceptions to this rule for advanced features: 64 * 65 * The first exception is for hardware encryption and decryption offload 66 * where the IV/ICV may or may not be generated in hardware. 67 * 68 * Secondly, when the hardware handles fragmentation, the frame handed to 69 * the driver from mac80211 is the MSDU, not the MPDU. 70 * 71 * Finally, for received frames, the driver is able to indicate that it has 72 * filled a radiotap header and put that in front of the frame; if it does 73 * not do so then mac80211 may add this under certain circumstances. 74 */ 75 76/** 77 * enum ieee80211_notification_type - Low level driver notification 78 * @IEEE80211_NOTIFY_RE_ASSOC: start the re-association sequence 79 */ 80enum ieee80211_notification_types { 81 IEEE80211_NOTIFY_RE_ASSOC, 82}; 83 84/** 85 * struct ieee80211_ht_bss_info - describing BSS's HT characteristics 86 * 87 * This structure describes most essential parameters needed 88 * to describe 802.11n HT characteristics in a BSS. 89 * 90 * @primary_channel: channel number of primery channel 91 * @bss_cap: 802.11n's general BSS capabilities (e.g. channel width) 92 * @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection) 93 */ 94struct ieee80211_ht_bss_info { 95 u8 primary_channel; 96 u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */ 97 u8 bss_op_mode; /* use IEEE80211_HT_IE_ */ 98}; 99 100/** 101 * enum ieee80211_max_queues - maximum number of queues 102 * 103 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 104 * @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable 105 * for A-MPDU operation. 106 */ 107enum ieee80211_max_queues { 108 IEEE80211_MAX_QUEUES = 16, 109 IEEE80211_MAX_AMPDU_QUEUES = 16, 110}; 111 112/** 113 * struct ieee80211_tx_queue_params - transmit queue configuration 114 * 115 * The information provided in this structure is required for QoS 116 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 117 * 118 * @aifs: arbitration interface space [0..255] 119 * @cw_min: minimum contention window [a value of the form 120 * 2^n-1 in the range 1..32767] 121 * @cw_max: maximum contention window [like @cw_min] 122 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 123 */ 124struct ieee80211_tx_queue_params { 125 u16 txop; 126 u16 cw_min; 127 u16 cw_max; 128 u8 aifs; 129}; 130 131/** 132 * struct ieee80211_tx_queue_stats - transmit queue statistics 133 * 134 * @len: number of packets in queue 135 * @limit: queue length limit 136 * @count: number of frames sent 137 */ 138struct ieee80211_tx_queue_stats { 139 unsigned int len; 140 unsigned int limit; 141 unsigned int count; 142}; 143 144struct ieee80211_low_level_stats { 145 unsigned int dot11ACKFailureCount; 146 unsigned int dot11RTSFailureCount; 147 unsigned int dot11FCSErrorCount; 148 unsigned int dot11RTSSuccessCount; 149}; 150 151/** 152 * enum ieee80211_bss_change - BSS change notification flags 153 * 154 * These flags are used with the bss_info_changed() callback 155 * to indicate which BSS parameter changed. 156 * 157 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 158 * also implies a change in the AID. 159 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 160 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 161 * @BSS_CHANGED_ERP_SLOT: slot timing changed 162 * @BSS_CHANGED_HT: 802.11n parameters changed 163 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 164 */ 165enum ieee80211_bss_change { 166 BSS_CHANGED_ASSOC = 1<<0, 167 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 168 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 169 BSS_CHANGED_ERP_SLOT = 1<<3, 170 BSS_CHANGED_HT = 1<<4, 171 BSS_CHANGED_BASIC_RATES = 1<<5, 172}; 173 174/** 175 * struct ieee80211_bss_conf - holds the BSS's changing parameters 176 * 177 * This structure keeps information about a BSS (and an association 178 * to that BSS) that can change during the lifetime of the BSS. 179 * 180 * @assoc: association status 181 * @aid: association ID number, valid only when @assoc is true 182 * @use_cts_prot: use CTS protection 183 * @use_short_preamble: use 802.11b short preamble 184 * @use_short_slot: use short slot time (only relevant for ERP) 185 * @dtim_period: num of beacons before the next DTIM, for PSM 186 * @timestamp: beacon timestamp 187 * @beacon_int: beacon interval 188 * @assoc_capability: capabilities taken from assoc resp 189 * @assoc_ht: association in HT mode 190 * @ht_conf: ht capabilities 191 * @ht_bss_conf: ht extended capabilities 192 * @basic_rates: bitmap of basic rates, each bit stands for an 193 * index into the rate table configured by the driver in 194 * the current band. 195 */ 196struct ieee80211_bss_conf { 197 /* association related data */ 198 bool assoc; 199 u16 aid; 200 /* erp related data */ 201 bool use_cts_prot; 202 bool use_short_preamble; 203 bool use_short_slot; 204 u8 dtim_period; 205 u16 beacon_int; 206 u16 assoc_capability; 207 u64 timestamp; 208 u64 basic_rates; 209 /* ht related data */ 210 bool assoc_ht; 211 struct ieee80211_ht_info *ht_conf; 212 struct ieee80211_ht_bss_info *ht_bss_conf; 213}; 214 215/** 216 * enum mac80211_tx_control_flags - flags to describe transmission information/status 217 * 218 * These flags are used with the @flags member of &ieee80211_tx_info. 219 * 220 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. 221 * @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame 222 * @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g., 223 * for combined 802.11g / 802.11b networks) 224 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 225 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD 226 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 227 * station 228 * @IEEE80211_TX_CTL_REQUEUE: TBD 229 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 230 * @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD 231 * @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the 232 * through set_retry_limit configured long retry value 233 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 234 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 235 * @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number 236 * of streams when this flag is on can be extracted from antenna_sel_tx, 237 * so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n 238 * antennas marked use MIMO_n. 239 * @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame 240 * @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width 241 * @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels 242 * @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval 243 * @IEEE80211_TX_CTL_INJECTED: TBD 244 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 245 * because the destination STA was in powersave mode. 246 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 247 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 248 * is for the whole aggregation. 249 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 250 * so consider using block ack request (BAR). 251 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 252 * number to this frame, taking care of not overwriting the fragment 253 * number and increasing the sequence number only when the 254 * IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly 255 * assign sequence numbers to QoS-data frames but cannot do so correctly 256 * for non-QoS-data and management frames because beacons need them from 257 * that counter as well and mac80211 cannot guarantee proper sequencing. 258 * If this flag is set, the driver should instruct the hardware to 259 * assign a sequence number to the frame or assign one itself. Cf. IEEE 260 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 261 * beacons always be clear for frames without a sequence number field. 262 */ 263enum mac80211_tx_control_flags { 264 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 265 IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2), 266 IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3), 267 IEEE80211_TX_CTL_NO_ACK = BIT(4), 268 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5), 269 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6), 270 IEEE80211_TX_CTL_REQUEUE = BIT(7), 271 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8), 272 IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9), 273 IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10), 274 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12), 275 IEEE80211_TX_CTL_AMPDU = BIT(13), 276 IEEE80211_TX_CTL_OFDM_HT = BIT(14), 277 IEEE80211_TX_CTL_GREEN_FIELD = BIT(15), 278 IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16), 279 IEEE80211_TX_CTL_DUP_DATA = BIT(17), 280 IEEE80211_TX_CTL_SHORT_GI = BIT(18), 281 IEEE80211_TX_CTL_INJECTED = BIT(19), 282 IEEE80211_TX_STAT_TX_FILTERED = BIT(20), 283 IEEE80211_TX_STAT_ACK = BIT(21), 284 IEEE80211_TX_STAT_AMPDU = BIT(22), 285 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23), 286 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24), 287}; 288 289 290#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \ 291 (sizeof(((struct sk_buff *)0)->cb) - 8) 292#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \ 293 (IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)) 294 295/** 296 * struct ieee80211_tx_info - skb transmit information 297 * 298 * This structure is placed in skb->cb for three uses: 299 * (1) mac80211 TX control - mac80211 tells the driver what to do 300 * (2) driver internal use (if applicable) 301 * (3) TX status information - driver tells mac80211 what happened 302 * 303 * @flags: transmit info flags, defined above 304 * @band: TBD 305 * @tx_rate_idx: TBD 306 * @antenna_sel_tx: TBD 307 * @control: union for control data 308 * @status: union for status data 309 * @driver_data: array of driver_data pointers 310 * @retry_count: number of retries 311 * @excessive_retries: set to 1 if the frame was retried many times 312 * but not acknowledged 313 * @ampdu_ack_len: number of aggregated frames. 314 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 315 * @ampdu_ack_map: block ack bit map for the aggregation. 316 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 317 * @ack_signal: signal strength of the ACK frame 318 */ 319struct ieee80211_tx_info { 320 /* common information */ 321 u32 flags; 322 u8 band; 323 s8 tx_rate_idx; 324 u8 antenna_sel_tx; 325 326 /* 1 byte hole */ 327 328 union { 329 struct { 330 struct ieee80211_vif *vif; 331 struct ieee80211_key_conf *hw_key; 332 unsigned long jiffies; 333 u16 aid; 334 s8 rts_cts_rate_idx, alt_retry_rate_idx; 335 u8 retry_limit; 336 u8 icv_len; 337 u8 iv_len; 338 } control; 339 struct { 340 u64 ampdu_ack_map; 341 int ack_signal; 342 u8 retry_count; 343 bool excessive_retries; 344 u8 ampdu_ack_len; 345 } status; 346 void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS]; 347 }; 348}; 349 350static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 351{ 352 return (struct ieee80211_tx_info *)skb->cb; 353} 354 355 356/** 357 * enum mac80211_rx_flags - receive flags 358 * 359 * These flags are used with the @flag member of &struct ieee80211_rx_status. 360 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 361 * Use together with %RX_FLAG_MMIC_STRIPPED. 362 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 363 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 364 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 365 * verification has been done by the hardware. 366 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 367 * If this flag is set, the stack cannot do any replay detection 368 * hence the driver or hardware will have to do that. 369 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 370 * the frame. 371 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 372 * the frame. 373 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 374 * is valid. This is useful in monitor mode and necessary for beacon frames 375 * to enable IBSS merging. 376 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 377 */ 378enum mac80211_rx_flags { 379 RX_FLAG_MMIC_ERROR = 1<<0, 380 RX_FLAG_DECRYPTED = 1<<1, 381 RX_FLAG_RADIOTAP = 1<<2, 382 RX_FLAG_MMIC_STRIPPED = 1<<3, 383 RX_FLAG_IV_STRIPPED = 1<<4, 384 RX_FLAG_FAILED_FCS_CRC = 1<<5, 385 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 386 RX_FLAG_TSFT = 1<<7, 387 RX_FLAG_SHORTPRE = 1<<8 388}; 389 390/** 391 * struct ieee80211_rx_status - receive status 392 * 393 * The low-level driver should provide this information (the subset 394 * supported by hardware) to the 802.11 code with each received 395 * frame. 396 * 397 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 398 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 399 * @band: the active band when this frame was received 400 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 401 * @signal: signal strength when receiving this frame, either in dBm, in dB or 402 * unspecified depending on the hardware capabilities flags 403 * @IEEE80211_HW_SIGNAL_* 404 * @noise: noise when receiving this frame, in dBm. 405 * @qual: overall signal quality indication, in percent (0-100). 406 * @antenna: antenna used 407 * @rate_idx: index of data rate into band's supported rates 408 * @flag: %RX_FLAG_* 409 */ 410struct ieee80211_rx_status { 411 u64 mactime; 412 enum ieee80211_band band; 413 int freq; 414 int signal; 415 int noise; 416 int qual; 417 int antenna; 418 int rate_idx; 419 int flag; 420}; 421 422/** 423 * enum ieee80211_conf_flags - configuration flags 424 * 425 * Flags to define PHY configuration options 426 * 427 * @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time 428 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 429 * @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported) 430 * @IEEE80211_CONF_PS: Enable 802.11 power save mode 431 */ 432enum ieee80211_conf_flags { 433 /* 434 * TODO: IEEE80211_CONF_SHORT_SLOT_TIME will be removed once drivers 435 * have been converted to use bss_info_changed() for slot time 436 * configuration 437 */ 438 IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0), 439 IEEE80211_CONF_RADIOTAP = (1<<1), 440 IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2), 441 IEEE80211_CONF_PS = (1<<3), 442}; 443 444/** 445 * struct ieee80211_conf - configuration of the device 446 * 447 * This struct indicates how the driver shall configure the hardware. 448 * 449 * @radio_enabled: when zero, driver is required to switch off the radio. 450 * TODO make a flag 451 * @beacon_int: beacon interval (TODO make interface config) 452 * @listen_interval: listen interval in units of beacon interval 453 * @flags: configuration flags defined above 454 * @power_level: requested transmit power (in dBm) 455 * @max_antenna_gain: maximum antenna gain (in dBi) 456 * @antenna_sel_tx: transmit antenna selection, 0: default/diversity, 457 * 1/2: antenna 0/1 458 * @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx 459 * @ht_conf: describes current self configuration of 802.11n HT capabilies 460 * @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters 461 * @channel: the channel to tune to 462 */ 463struct ieee80211_conf { 464 int radio_enabled; 465 466 int beacon_int; 467 u16 listen_interval; 468 u32 flags; 469 int power_level; 470 int max_antenna_gain; 471 u8 antenna_sel_tx; 472 u8 antenna_sel_rx; 473 474 struct ieee80211_channel *channel; 475 476 struct ieee80211_ht_info ht_conf; 477 struct ieee80211_ht_bss_info ht_bss_conf; 478}; 479 480/** 481 * enum ieee80211_if_types - types of 802.11 network interfaces 482 * 483 * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used 484 * by mac80211 itself 485 * @IEEE80211_IF_TYPE_AP: interface in AP mode. 486 * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap 487 * daemon. Drivers should never see this type. 488 * @IEEE80211_IF_TYPE_STA: interface in STA (client) mode. 489 * @IEEE80211_IF_TYPE_IBSS: interface in IBSS (ad-hoc) mode. 490 * @IEEE80211_IF_TYPE_MNTR: interface in monitor (rfmon) mode. 491 * @IEEE80211_IF_TYPE_WDS: interface in WDS mode. 492 * @IEEE80211_IF_TYPE_VLAN: VLAN interface bound to an AP, drivers 493 * will never see this type. 494 * @IEEE80211_IF_TYPE_MESH_POINT: 802.11s mesh point 495 */ 496enum ieee80211_if_types { 497 IEEE80211_IF_TYPE_INVALID, 498 IEEE80211_IF_TYPE_AP, 499 IEEE80211_IF_TYPE_STA, 500 IEEE80211_IF_TYPE_IBSS, 501 IEEE80211_IF_TYPE_MESH_POINT, 502 IEEE80211_IF_TYPE_MNTR, 503 IEEE80211_IF_TYPE_WDS, 504 IEEE80211_IF_TYPE_VLAN, 505}; 506 507/** 508 * struct ieee80211_vif - per-interface data 509 * 510 * Data in this structure is continually present for driver 511 * use during the life of a virtual interface. 512 * 513 * @type: type of this virtual interface 514 * @drv_priv: data area for driver use, will always be aligned to 515 * sizeof(void *). 516 */ 517struct ieee80211_vif { 518 enum ieee80211_if_types type; 519 /* must be last */ 520 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 521}; 522 523static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 524{ 525#ifdef CONFIG_MAC80211_MESH 526 return vif->type == IEEE80211_IF_TYPE_MESH_POINT; 527#endif 528 return false; 529} 530 531/** 532 * struct ieee80211_if_init_conf - initial configuration of an interface 533 * 534 * @vif: pointer to a driver-use per-interface structure. The pointer 535 * itself is also used for various functions including 536 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 537 * @type: one of &enum ieee80211_if_types constants. Determines the type of 538 * added/removed interface. 539 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 540 * until the interface is removed (i.e. it cannot be used after 541 * remove_interface() callback was called for this interface). 542 * 543 * This structure is used in add_interface() and remove_interface() 544 * callbacks of &struct ieee80211_hw. 545 * 546 * When you allow multiple interfaces to be added to your PHY, take care 547 * that the hardware can actually handle multiple MAC addresses. However, 548 * also take care that when there's no interface left with mac_addr != %NULL 549 * you remove the MAC address from the device to avoid acknowledging packets 550 * in pure monitor mode. 551 */ 552struct ieee80211_if_init_conf { 553 enum ieee80211_if_types type; 554 struct ieee80211_vif *vif; 555 void *mac_addr; 556}; 557 558/** 559 * enum ieee80211_if_conf_change - interface config change flags 560 * 561 * @IEEE80211_IFCC_BSSID: The BSSID changed. 562 * @IEEE80211_IFCC_SSID: The SSID changed. 563 * @IEEE80211_IFCC_BEACON: The beacon for this interface changed 564 * (currently AP and MESH only), use ieee80211_beacon_get(). 565 */ 566enum ieee80211_if_conf_change { 567 IEEE80211_IFCC_BSSID = BIT(0), 568 IEEE80211_IFCC_SSID = BIT(1), 569 IEEE80211_IFCC_BEACON = BIT(2), 570}; 571 572/** 573 * struct ieee80211_if_conf - configuration of an interface 574 * 575 * @changed: parameters that have changed, see &enum ieee80211_if_conf_change. 576 * @bssid: BSSID of the network we are associated to/creating. 577 * @ssid: used (together with @ssid_len) by drivers for hardware that 578 * generate beacons independently. The pointer is valid only during the 579 * config_interface() call, so copy the value somewhere if you need 580 * it. 581 * @ssid_len: length of the @ssid field. 582 * 583 * This structure is passed to the config_interface() callback of 584 * &struct ieee80211_hw. 585 */ 586struct ieee80211_if_conf { 587 u32 changed; 588 u8 *bssid; 589 u8 *ssid; 590 size_t ssid_len; 591}; 592 593/** 594 * enum ieee80211_key_alg - key algorithm 595 * @ALG_WEP: WEP40 or WEP104 596 * @ALG_TKIP: TKIP 597 * @ALG_CCMP: CCMP (AES) 598 */ 599enum ieee80211_key_alg { 600 ALG_WEP, 601 ALG_TKIP, 602 ALG_CCMP, 603}; 604 605/** 606 * enum ieee80211_key_len - key length 607 * @LEN_WEP40: WEP 5-byte long key 608 * @LEN_WEP104: WEP 13-byte long key 609 */ 610enum ieee80211_key_len { 611 LEN_WEP40 = 5, 612 LEN_WEP104 = 13, 613}; 614 615/** 616 * enum ieee80211_key_flags - key flags 617 * 618 * These flags are used for communication about keys between the driver 619 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 620 * 621 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 622 * that the STA this key will be used with could be using QoS. 623 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 624 * driver to indicate that it requires IV generation for this 625 * particular key. 626 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 627 * the driver for a TKIP key if it requires Michael MIC 628 * generation in software. 629 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 630 * that the key is pairwise rather then a shared key. 631 */ 632enum ieee80211_key_flags { 633 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 634 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 635 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 636 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 637}; 638 639/** 640 * struct ieee80211_key_conf - key information 641 * 642 * This key information is given by mac80211 to the driver by 643 * the set_key() callback in &struct ieee80211_ops. 644 * 645 * @hw_key_idx: To be set by the driver, this is the key index the driver 646 * wants to be given when a frame is transmitted and needs to be 647 * encrypted in hardware. 648 * @alg: The key algorithm. 649 * @flags: key flags, see &enum ieee80211_key_flags. 650 * @keyidx: the key index (0-3) 651 * @keylen: key material length 652 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 653 * data block: 654 * - Temporal Encryption Key (128 bits) 655 * - Temporal Authenticator Tx MIC Key (64 bits) 656 * - Temporal Authenticator Rx MIC Key (64 bits) 657 * 658 */ 659struct ieee80211_key_conf { 660 enum ieee80211_key_alg alg; 661 u8 hw_key_idx; 662 u8 flags; 663 s8 keyidx; 664 u8 keylen; 665 u8 key[0]; 666}; 667 668/** 669 * enum set_key_cmd - key command 670 * 671 * Used with the set_key() callback in &struct ieee80211_ops, this 672 * indicates whether a key is being removed or added. 673 * 674 * @SET_KEY: a key is set 675 * @DISABLE_KEY: a key must be disabled 676 */ 677enum set_key_cmd { 678 SET_KEY, DISABLE_KEY, 679}; 680 681/** 682 * enum sta_notify_cmd - sta notify command 683 * 684 * Used with the sta_notify() callback in &struct ieee80211_ops, this 685 * indicates addition and removal of a station to station table. 686 * 687 * @STA_NOTIFY_ADD: a station was added to the station table 688 * @STA_NOTIFY_REMOVE: a station being removed from the station table 689 */ 690enum sta_notify_cmd { 691 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE 692}; 693 694/** 695 * enum ieee80211_tkip_key_type - get tkip key 696 * 697 * Used by drivers which need to get a tkip key for skb. Some drivers need a 698 * phase 1 key, others need a phase 2 key. A single function allows the driver 699 * to get the key, this enum indicates what type of key is required. 700 * 701 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 702 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 703 */ 704enum ieee80211_tkip_key_type { 705 IEEE80211_TKIP_P1_KEY, 706 IEEE80211_TKIP_P2_KEY, 707}; 708 709/** 710 * enum ieee80211_hw_flags - hardware flags 711 * 712 * These flags are used to indicate hardware capabilities to 713 * the stack. Generally, flags here should have their meaning 714 * done in a way that the simplest hardware doesn't need setting 715 * any particular flags. There are some exceptions to this rule, 716 * however, so you are advised to review these flags carefully. 717 * 718 * @IEEE80211_HW_RX_INCLUDES_FCS: 719 * Indicates that received frames passed to the stack include 720 * the FCS at the end. 721 * 722 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 723 * Some wireless LAN chipsets buffer broadcast/multicast frames 724 * for power saving stations in the hardware/firmware and others 725 * rely on the host system for such buffering. This option is used 726 * to configure the IEEE 802.11 upper layer to buffer broadcast and 727 * multicast frames when there are power saving stations so that 728 * the driver can fetch them with ieee80211_get_buffered_bc(). 729 * 730 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 731 * Hardware is not capable of short slot operation on the 2.4 GHz band. 732 * 733 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 734 * Hardware is not capable of receiving frames with short preamble on 735 * the 2.4 GHz band. 736 * 737 * @IEEE80211_HW_SIGNAL_UNSPEC: 738 * Hardware can provide signal values but we don't know its units. We 739 * expect values between 0 and @max_signal. 740 * If possible please provide dB or dBm instead. 741 * 742 * @IEEE80211_HW_SIGNAL_DB: 743 * Hardware gives signal values in dB, decibel difference from an 744 * arbitrary, fixed reference. We expect values between 0 and @max_signal. 745 * If possible please provide dBm instead. 746 * 747 * @IEEE80211_HW_SIGNAL_DBM: 748 * Hardware gives signal values in dBm, decibel difference from 749 * one milliwatt. This is the preferred method since it is standardized 750 * between different devices. @max_signal does not need to be set. 751 * 752 * @IEEE80211_HW_NOISE_DBM: 753 * Hardware can provide noise (radio interference) values in units dBm, 754 * decibel difference from one milliwatt. 755 * 756 * @IEEE80211_HW_SPECTRUM_MGMT: 757 * Hardware supports spectrum management defined in 802.11h 758 * Measurement, Channel Switch, Quieting, TPC 759 */ 760enum ieee80211_hw_flags { 761 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 762 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 763 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 764 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 765 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 766 IEEE80211_HW_SIGNAL_DB = 1<<6, 767 IEEE80211_HW_SIGNAL_DBM = 1<<7, 768 IEEE80211_HW_NOISE_DBM = 1<<8, 769 IEEE80211_HW_SPECTRUM_MGMT = 1<<9, 770}; 771 772/** 773 * struct ieee80211_hw - hardware information and state 774 * 775 * This structure contains the configuration and hardware 776 * information for an 802.11 PHY. 777 * 778 * @wiphy: This points to the &struct wiphy allocated for this 779 * 802.11 PHY. You must fill in the @perm_addr and @dev 780 * members of this structure using SET_IEEE80211_DEV() 781 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 782 * bands (with channels, bitrates) are registered here. 783 * 784 * @conf: &struct ieee80211_conf, device configuration, don't use. 785 * 786 * @workqueue: single threaded workqueue available for driver use, 787 * allocated by mac80211 on registration and flushed when an 788 * interface is removed. 789 * NOTICE: All work performed on this workqueue should NEVER 790 * acquire the RTNL lock (i.e. Don't use the function 791 * ieee80211_iterate_active_interfaces()) 792 * 793 * @priv: pointer to private area that was allocated for driver use 794 * along with this structure. 795 * 796 * @flags: hardware flags, see &enum ieee80211_hw_flags. 797 * 798 * @extra_tx_headroom: headroom to reserve in each transmit skb 799 * for use by the driver (e.g. for transmit headers.) 800 * 801 * @channel_change_time: time (in microseconds) it takes to change channels. 802 * 803 * @max_signal: Maximum value for signal (rssi) in RX information, used 804 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 805 * 806 * @max_listen_interval: max listen interval in units of beacon interval 807 * that HW supports 808 * 809 * @queues: number of available hardware transmit queues for 810 * data packets. WMM/QoS requires at least four, these 811 * queues need to have configurable access parameters. 812 * 813 * @ampdu_queues: number of available hardware transmit queues 814 * for A-MPDU packets, these have no access parameters 815 * because they're used only for A-MPDU frames. Note that 816 * mac80211 will not currently use any of the regular queues 817 * for aggregation. 818 * 819 * @rate_control_algorithm: rate control algorithm for this hardware. 820 * If unset (NULL), the default algorithm will be used. Must be 821 * set before calling ieee80211_register_hw(). 822 * 823 * @vif_data_size: size (in bytes) of the drv_priv data area 824 * within &struct ieee80211_vif. 825 */ 826struct ieee80211_hw { 827 struct ieee80211_conf conf; 828 struct wiphy *wiphy; 829 struct workqueue_struct *workqueue; 830 const char *rate_control_algorithm; 831 void *priv; 832 u32 flags; 833 unsigned int extra_tx_headroom; 834 int channel_change_time; 835 int vif_data_size; 836 u16 queues; 837 u16 ampdu_queues; 838 u16 max_listen_interval; 839 s8 max_signal; 840}; 841 842struct ieee80211_hw *wiphy_to_hw(struct wiphy *wiphy); 843 844/** 845 * SET_IEEE80211_DEV - set device for 802.11 hardware 846 * 847 * @hw: the &struct ieee80211_hw to set the device for 848 * @dev: the &struct device of this 802.11 device 849 */ 850static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 851{ 852 set_wiphy_dev(hw->wiphy, dev); 853} 854 855/** 856 * SET_IEEE80211_PERM_ADDR - set the permanenet MAC address for 802.11 hardware 857 * 858 * @hw: the &struct ieee80211_hw to set the MAC address for 859 * @addr: the address to set 860 */ 861static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 862{ 863 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 864} 865 866static inline int ieee80211_num_regular_queues(struct ieee80211_hw *hw) 867{ 868 return hw->queues; 869} 870 871static inline int ieee80211_num_queues(struct ieee80211_hw *hw) 872{ 873 return hw->queues + hw->ampdu_queues; 874} 875 876static inline struct ieee80211_rate * 877ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 878 const struct ieee80211_tx_info *c) 879{ 880 if (WARN_ON(c->tx_rate_idx < 0)) 881 return NULL; 882 return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_idx]; 883} 884 885static inline struct ieee80211_rate * 886ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 887 const struct ieee80211_tx_info *c) 888{ 889 if (c->control.rts_cts_rate_idx < 0) 890 return NULL; 891 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 892} 893 894static inline struct ieee80211_rate * 895ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 896 const struct ieee80211_tx_info *c) 897{ 898 if (c->control.alt_retry_rate_idx < 0) 899 return NULL; 900 return &hw->wiphy->bands[c->band]->bitrates[c->control.alt_retry_rate_idx]; 901} 902 903/** 904 * DOC: Hardware crypto acceleration 905 * 906 * mac80211 is capable of taking advantage of many hardware 907 * acceleration designs for encryption and decryption operations. 908 * 909 * The set_key() callback in the &struct ieee80211_ops for a given 910 * device is called to enable hardware acceleration of encryption and 911 * decryption. The callback takes an @address parameter that will be 912 * the broadcast address for default keys, the other station's hardware 913 * address for individual keys or the zero address for keys that will 914 * be used only for transmission. 915 * Multiple transmission keys with the same key index may be used when 916 * VLANs are configured for an access point. 917 * 918 * The @local_address parameter will always be set to our own address, 919 * this is only relevant if you support multiple local addresses. 920 * 921 * When transmitting, the TX control data will use the @hw_key_idx 922 * selected by the driver by modifying the &struct ieee80211_key_conf 923 * pointed to by the @key parameter to the set_key() function. 924 * 925 * The set_key() call for the %SET_KEY command should return 0 if 926 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 927 * added; if you return 0 then hw_key_idx must be assigned to the 928 * hardware key index, you are free to use the full u8 range. 929 * 930 * When the cmd is %DISABLE_KEY then it must succeed. 931 * 932 * Note that it is permissible to not decrypt a frame even if a key 933 * for it has been uploaded to hardware, the stack will not make any 934 * decision based on whether a key has been uploaded or not but rather 935 * based on the receive flags. 936 * 937 * The &struct ieee80211_key_conf structure pointed to by the @key 938 * parameter is guaranteed to be valid until another call to set_key() 939 * removes it, but it can only be used as a cookie to differentiate 940 * keys. 941 * 942 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 943 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 944 * handler. 945 * The update_tkip_key() call updates the driver with the new phase 1 key. 946 * This happens everytime the iv16 wraps around (every 65536 packets). The 947 * set_key() call will happen only once for each key (unless the AP did 948 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 949 * provided by udpate_tkip_key only. The trigger that makes mac80211 call this 950 * handler is software decryption with wrap around of iv16. 951 */ 952 953/** 954 * DOC: Frame filtering 955 * 956 * mac80211 requires to see many management frames for proper 957 * operation, and users may want to see many more frames when 958 * in monitor mode. However, for best CPU usage and power consumption, 959 * having as few frames as possible percolate through the stack is 960 * desirable. Hence, the hardware should filter as much as possible. 961 * 962 * To achieve this, mac80211 uses filter flags (see below) to tell 963 * the driver's configure_filter() function which frames should be 964 * passed to mac80211 and which should be filtered out. 965 * 966 * The configure_filter() callback is invoked with the parameters 967 * @mc_count and @mc_list for the combined multicast address list 968 * of all virtual interfaces, @changed_flags telling which flags 969 * were changed and @total_flags with the new flag states. 970 * 971 * If your device has no multicast address filters your driver will 972 * need to check both the %FIF_ALLMULTI flag and the @mc_count 973 * parameter to see whether multicast frames should be accepted 974 * or dropped. 975 * 976 * All unsupported flags in @total_flags must be cleared. 977 * Hardware does not support a flag if it is incapable of _passing_ 978 * the frame to the stack. Otherwise the driver must ignore 979 * the flag, but not clear it. 980 * You must _only_ clear the flag (announce no support for the 981 * flag to mac80211) if you are not able to pass the packet type 982 * to the stack (so the hardware always filters it). 983 * So for example, you should clear @FIF_CONTROL, if your hardware 984 * always filters control frames. If your hardware always passes 985 * control frames to the kernel and is incapable of filtering them, 986 * you do _not_ clear the @FIF_CONTROL flag. 987 * This rule applies to all other FIF flags as well. 988 */ 989 990/** 991 * enum ieee80211_filter_flags - hardware filter flags 992 * 993 * These flags determine what the filter in hardware should be 994 * programmed to let through and what should not be passed to the 995 * stack. It is always safe to pass more frames than requested, 996 * but this has negative impact on power consumption. 997 * 998 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 999 * think of the BSS as your network segment and then this corresponds 1000 * to the regular ethernet device promiscuous mode. 1001 * 1002 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1003 * by the user or if the hardware is not capable of filtering by 1004 * multicast address. 1005 * 1006 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1007 * %RX_FLAG_FAILED_FCS_CRC for them) 1008 * 1009 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1010 * the %RX_FLAG_FAILED_PLCP_CRC for them 1011 * 1012 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1013 * to the hardware that it should not filter beacons or probe responses 1014 * by BSSID. Filtering them can greatly reduce the amount of processing 1015 * mac80211 needs to do and the amount of CPU wakeups, so you should 1016 * honour this flag if possible. 1017 * 1018 * @FIF_CONTROL: pass control frames, if PROMISC_IN_BSS is not set then 1019 * only those addressed to this station 1020 * 1021 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1022 */ 1023enum ieee80211_filter_flags { 1024 FIF_PROMISC_IN_BSS = 1<<0, 1025 FIF_ALLMULTI = 1<<1, 1026 FIF_FCSFAIL = 1<<2, 1027 FIF_PLCPFAIL = 1<<3, 1028 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1029 FIF_CONTROL = 1<<5, 1030 FIF_OTHER_BSS = 1<<6, 1031}; 1032 1033/** 1034 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1035 * 1036 * These flags are used with the ampdu_action() callback in 1037 * &struct ieee80211_ops to indicate which action is needed. 1038 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1039 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1040 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1041 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1042 */ 1043enum ieee80211_ampdu_mlme_action { 1044 IEEE80211_AMPDU_RX_START, 1045 IEEE80211_AMPDU_RX_STOP, 1046 IEEE80211_AMPDU_TX_START, 1047 IEEE80211_AMPDU_TX_STOP, 1048}; 1049 1050/** 1051 * struct ieee80211_ops - callbacks from mac80211 to the driver 1052 * 1053 * This structure contains various callbacks that the driver may 1054 * handle or, in some cases, must handle, for example to configure 1055 * the hardware to a new channel or to transmit a frame. 1056 * 1057 * @tx: Handler that 802.11 module calls for each transmitted frame. 1058 * skb contains the buffer starting from the IEEE 802.11 header. 1059 * The low-level driver should send the frame out based on 1060 * configuration in the TX control data. This handler should, 1061 * preferably, never fail and stop queues appropriately, more 1062 * importantly, however, it must never fail for A-MPDU-queues. 1063 * Must be implemented and atomic. 1064 * 1065 * @start: Called before the first netdevice attached to the hardware 1066 * is enabled. This should turn on the hardware and must turn on 1067 * frame reception (for possibly enabled monitor interfaces.) 1068 * Returns negative error codes, these may be seen in userspace, 1069 * or zero. 1070 * When the device is started it should not have a MAC address 1071 * to avoid acknowledging frames before a non-monitor device 1072 * is added. 1073 * Must be implemented. 1074 * 1075 * @stop: Called after last netdevice attached to the hardware 1076 * is disabled. This should turn off the hardware (at least 1077 * it must turn off frame reception.) 1078 * May be called right after add_interface if that rejects 1079 * an interface. 1080 * Must be implemented. 1081 * 1082 * @add_interface: Called when a netdevice attached to the hardware is 1083 * enabled. Because it is not called for monitor mode devices, @open 1084 * and @stop must be implemented. 1085 * The driver should perform any initialization it needs before 1086 * the device can be enabled. The initial configuration for the 1087 * interface is given in the conf parameter. 1088 * The callback may refuse to add an interface by returning a 1089 * negative error code (which will be seen in userspace.) 1090 * Must be implemented. 1091 * 1092 * @remove_interface: Notifies a driver that an interface is going down. 1093 * The @stop callback is called after this if it is the last interface 1094 * and no monitor interfaces are present. 1095 * When all interfaces are removed, the MAC address in the hardware 1096 * must be cleared so the device no longer acknowledges packets, 1097 * the mac_addr member of the conf structure is, however, set to the 1098 * MAC address of the device going away. 1099 * Hence, this callback must be implemented. 1100 * 1101 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1102 * function to change hardware configuration, e.g., channel. 1103 * 1104 * @config_interface: Handler for configuration requests related to interfaces 1105 * (e.g. BSSID changes.) 1106 * 1107 * @bss_info_changed: Handler for configuration requests related to BSS 1108 * parameters that may vary during BSS's lifespan, and may affect low 1109 * level driver (e.g. assoc/disassoc status, erp parameters). 1110 * This function should not be used if no BSS has been set, unless 1111 * for association indication. The @changed parameter indicates which 1112 * of the bss parameters has changed when a call is made. 1113 * 1114 * @configure_filter: Configure the device's RX filter. 1115 * See the section "Frame filtering" for more information. 1116 * This callback must be implemented and atomic. 1117 * 1118 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1119 * must be set or cleared for a given AID. Must be atomic. 1120 * 1121 * @set_key: See the section "Hardware crypto acceleration" 1122 * This callback can sleep, and is only called between add_interface 1123 * and remove_interface calls, i.e. while the interface with the 1124 * given local_address is enabled. 1125 * 1126 * @update_tkip_key: See the section "Hardware crypto acceleration" 1127 * This callback will be called in the context of Rx. Called for drivers 1128 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1129 * 1130 * @hw_scan: Ask the hardware to service the scan request, no need to start 1131 * the scan state machine in stack. The scan must honour the channel 1132 * configuration done by the regulatory agent in the wiphy's registered 1133 * bands. When the scan finishes, ieee80211_scan_completed() must be 1134 * called; note that it also must be called when the scan cannot finish 1135 * because the hardware is turned off! Anything else is a bug! 1136 * 1137 * @get_stats: return low-level statistics 1138 * 1139 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1140 * callback should be provided to read the TKIP transmit IVs (both IV32 1141 * and IV16) for the given key from hardware. 1142 * 1143 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1144 * 1145 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this if 1146 * the device does fragmentation by itself; if this method is assigned then 1147 * the stack will not do fragmentation. 1148 * 1149 * @set_retry_limit: Configuration of retry limits (if device needs it) 1150 * 1151 * @sta_notify: Notifies low level driver about addition or removal 1152 * of assocaited station or AP. 1153 * 1154 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1155 * bursting) for a hardware TX queue. 1156 * 1157 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1158 * to get number of currently queued packets (queue length), maximum queue 1159 * size (limit), and total number of packets sent using each TX queue 1160 * (count). The 'stats' pointer points to an array that has hw->queues + 1161 * hw->ampdu_queues items. 1162 * 1163 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1164 * this is only used for IBSS mode debugging and, as such, is not a 1165 * required function. Must be atomic. 1166 * 1167 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1168 * with other STAs in the IBSS. This is only used in IBSS mode. This 1169 * function is optional if the firmware/hardware takes full care of 1170 * TSF synchronization. 1171 * 1172 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1173 * This is needed only for IBSS mode and the result of this function is 1174 * used to determine whether to reply to Probe Requests. 1175 * 1176 * @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic. 1177 * 1178 * @ampdu_action: Perform a certain A-MPDU action 1179 * The RA/TID combination determines the destination and TID we want 1180 * the ampdu action to be performed for. The action is defined through 1181 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1182 * is the first frame we expect to perform the action on. notice 1183 * that TX/RX_STOP can pass NULL for this parameter. 1184 */ 1185struct ieee80211_ops { 1186 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1187 int (*start)(struct ieee80211_hw *hw); 1188 void (*stop)(struct ieee80211_hw *hw); 1189 int (*add_interface)(struct ieee80211_hw *hw, 1190 struct ieee80211_if_init_conf *conf); 1191 void (*remove_interface)(struct ieee80211_hw *hw, 1192 struct ieee80211_if_init_conf *conf); 1193 int (*config)(struct ieee80211_hw *hw, struct ieee80211_conf *conf); 1194 int (*config_interface)(struct ieee80211_hw *hw, 1195 struct ieee80211_vif *vif, 1196 struct ieee80211_if_conf *conf); 1197 void (*bss_info_changed)(struct ieee80211_hw *hw, 1198 struct ieee80211_vif *vif, 1199 struct ieee80211_bss_conf *info, 1200 u32 changed); 1201 void (*configure_filter)(struct ieee80211_hw *hw, 1202 unsigned int changed_flags, 1203 unsigned int *total_flags, 1204 int mc_count, struct dev_addr_list *mc_list); 1205 int (*set_tim)(struct ieee80211_hw *hw, int aid, int set); 1206 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1207 const u8 *local_address, const u8 *address, 1208 struct ieee80211_key_conf *key); 1209 void (*update_tkip_key)(struct ieee80211_hw *hw, 1210 struct ieee80211_key_conf *conf, const u8 *address, 1211 u32 iv32, u16 *phase1key); 1212 int (*hw_scan)(struct ieee80211_hw *hw, u8 *ssid, size_t len); 1213 int (*get_stats)(struct ieee80211_hw *hw, 1214 struct ieee80211_low_level_stats *stats); 1215 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1216 u32 *iv32, u16 *iv16); 1217 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1218 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1219 int (*set_retry_limit)(struct ieee80211_hw *hw, 1220 u32 short_retry, u32 long_retr); 1221 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1222 enum sta_notify_cmd, const u8 *addr); 1223 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1224 const struct ieee80211_tx_queue_params *params); 1225 int (*get_tx_stats)(struct ieee80211_hw *hw, 1226 struct ieee80211_tx_queue_stats *stats); 1227 u64 (*get_tsf)(struct ieee80211_hw *hw); 1228 void (*reset_tsf)(struct ieee80211_hw *hw); 1229 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1230 int (*ampdu_action)(struct ieee80211_hw *hw, 1231 enum ieee80211_ampdu_mlme_action action, 1232 const u8 *addr, u16 tid, u16 *ssn); 1233}; 1234 1235/** 1236 * ieee80211_alloc_hw - Allocate a new hardware device 1237 * 1238 * This must be called once for each hardware device. The returned pointer 1239 * must be used to refer to this device when calling other functions. 1240 * mac80211 allocates a private data area for the driver pointed to by 1241 * @priv in &struct ieee80211_hw, the size of this area is given as 1242 * @priv_data_len. 1243 * 1244 * @priv_data_len: length of private data 1245 * @ops: callbacks for this device 1246 */ 1247struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1248 const struct ieee80211_ops *ops); 1249 1250/** 1251 * ieee80211_register_hw - Register hardware device 1252 * 1253 * You must call this function before any other functions in 1254 * mac80211. Note that before a hardware can be registered, you 1255 * need to fill the contained wiphy's information. 1256 * 1257 * @hw: the device to register as returned by ieee80211_alloc_hw() 1258 */ 1259int ieee80211_register_hw(struct ieee80211_hw *hw); 1260 1261#ifdef CONFIG_MAC80211_LEDS 1262extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1263extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1264extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1265extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1266#endif 1267/** 1268 * ieee80211_get_tx_led_name - get name of TX LED 1269 * 1270 * mac80211 creates a transmit LED trigger for each wireless hardware 1271 * that can be used to drive LEDs if your driver registers a LED device. 1272 * This function returns the name (or %NULL if not configured for LEDs) 1273 * of the trigger so you can automatically link the LED device. 1274 * 1275 * @hw: the hardware to get the LED trigger name for 1276 */ 1277static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1278{ 1279#ifdef CONFIG_MAC80211_LEDS 1280 return __ieee80211_get_tx_led_name(hw); 1281#else 1282 return NULL; 1283#endif 1284} 1285 1286/** 1287 * ieee80211_get_rx_led_name - get name of RX LED 1288 * 1289 * mac80211 creates a receive LED trigger for each wireless hardware 1290 * that can be used to drive LEDs if your driver registers a LED device. 1291 * This function returns the name (or %NULL if not configured for LEDs) 1292 * of the trigger so you can automatically link the LED device. 1293 * 1294 * @hw: the hardware to get the LED trigger name for 1295 */ 1296static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1297{ 1298#ifdef CONFIG_MAC80211_LEDS 1299 return __ieee80211_get_rx_led_name(hw); 1300#else 1301 return NULL; 1302#endif 1303} 1304 1305/** 1306 * ieee80211_get_assoc_led_name - get name of association LED 1307 * 1308 * mac80211 creates a association LED trigger for each wireless hardware 1309 * that can be used to drive LEDs if your driver registers a LED device. 1310 * This function returns the name (or %NULL if not configured for LEDs) 1311 * of the trigger so you can automatically link the LED device. 1312 * 1313 * @hw: the hardware to get the LED trigger name for 1314 */ 1315static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1316{ 1317#ifdef CONFIG_MAC80211_LEDS 1318 return __ieee80211_get_assoc_led_name(hw); 1319#else 1320 return NULL; 1321#endif 1322} 1323 1324/** 1325 * ieee80211_get_radio_led_name - get name of radio LED 1326 * 1327 * mac80211 creates a radio change LED trigger for each wireless hardware 1328 * that can be used to drive LEDs if your driver registers a LED device. 1329 * This function returns the name (or %NULL if not configured for LEDs) 1330 * of the trigger so you can automatically link the LED device. 1331 * 1332 * @hw: the hardware to get the LED trigger name for 1333 */ 1334static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1335{ 1336#ifdef CONFIG_MAC80211_LEDS 1337 return __ieee80211_get_radio_led_name(hw); 1338#else 1339 return NULL; 1340#endif 1341} 1342 1343/** 1344 * ieee80211_unregister_hw - Unregister a hardware device 1345 * 1346 * This function instructs mac80211 to free allocated resources 1347 * and unregister netdevices from the networking subsystem. 1348 * 1349 * @hw: the hardware to unregister 1350 */ 1351void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1352 1353/** 1354 * ieee80211_free_hw - free hardware descriptor 1355 * 1356 * This function frees everything that was allocated, including the 1357 * private data for the driver. You must call ieee80211_unregister_hw() 1358 * before calling this function. 1359 * 1360 * @hw: the hardware to free 1361 */ 1362void ieee80211_free_hw(struct ieee80211_hw *hw); 1363 1364/* trick to avoid symbol clashes with the ieee80211 subsystem */ 1365void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1366 struct ieee80211_rx_status *status); 1367 1368/** 1369 * ieee80211_rx - receive frame 1370 * 1371 * Use this function to hand received frames to mac80211. The receive 1372 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1373 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1374 * 1375 * This function may not be called in IRQ context. Calls to this function 1376 * for a single hardware must be synchronized against each other. Calls 1377 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1378 * single hardware. 1379 * 1380 * @hw: the hardware this frame came in on 1381 * @skb: the buffer to receive, owned by mac80211 after this call 1382 * @status: status of this frame; the status pointer need not be valid 1383 * after this function returns 1384 */ 1385static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, 1386 struct ieee80211_rx_status *status) 1387{ 1388 __ieee80211_rx(hw, skb, status); 1389} 1390 1391/** 1392 * ieee80211_rx_irqsafe - receive frame 1393 * 1394 * Like ieee80211_rx() but can be called in IRQ context 1395 * (internally defers to a tasklet.) 1396 * 1397 * Calls to this function and ieee80211_rx() may not be mixed for a 1398 * single hardware. 1399 * 1400 * @hw: the hardware this frame came in on 1401 * @skb: the buffer to receive, owned by mac80211 after this call 1402 * @status: status of this frame; the status pointer need not be valid 1403 * after this function returns and is not freed by mac80211, 1404 * it is recommended that it points to a stack area 1405 */ 1406void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, 1407 struct sk_buff *skb, 1408 struct ieee80211_rx_status *status); 1409 1410/** 1411 * ieee80211_tx_status - transmit status callback 1412 * 1413 * Call this function for all transmitted frames after they have been 1414 * transmitted. It is permissible to not call this function for 1415 * multicast frames but this can affect statistics. 1416 * 1417 * This function may not be called in IRQ context. Calls to this function 1418 * for a single hardware must be synchronized against each other. Calls 1419 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1420 * for a single hardware. 1421 * 1422 * @hw: the hardware the frame was transmitted by 1423 * @skb: the frame that was transmitted, owned by mac80211 after this call 1424 */ 1425void ieee80211_tx_status(struct ieee80211_hw *hw, 1426 struct sk_buff *skb); 1427 1428/** 1429 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 1430 * 1431 * Like ieee80211_tx_status() but can be called in IRQ context 1432 * (internally defers to a tasklet.) 1433 * 1434 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1435 * single hardware. 1436 * 1437 * @hw: the hardware the frame was transmitted by 1438 * @skb: the frame that was transmitted, owned by mac80211 after this call 1439 */ 1440void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1441 struct sk_buff *skb); 1442 1443/** 1444 * ieee80211_beacon_get - beacon generation function 1445 * @hw: pointer obtained from ieee80211_alloc_hw(). 1446 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1447 * @control: will be filled with information needed to send this beacon. 1448 * 1449 * If the beacon frames are generated by the host system (i.e., not in 1450 * hardware/firmware), the low-level driver uses this function to receive 1451 * the next beacon frame from the 802.11 code. The low-level is responsible 1452 * for calling this function before beacon data is needed (e.g., based on 1453 * hardware interrupt). Returned skb is used only once and low-level driver 1454 * is responsible of freeing it. 1455 */ 1456struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1457 struct ieee80211_vif *vif); 1458 1459/** 1460 * ieee80211_rts_get - RTS frame generation function 1461 * @hw: pointer obtained from ieee80211_alloc_hw(). 1462 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1463 * @frame: pointer to the frame that is going to be protected by the RTS. 1464 * @frame_len: the frame length (in octets). 1465 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1466 * @rts: The buffer where to store the RTS frame. 1467 * 1468 * If the RTS frames are generated by the host system (i.e., not in 1469 * hardware/firmware), the low-level driver uses this function to receive 1470 * the next RTS frame from the 802.11 code. The low-level is responsible 1471 * for calling this function before and RTS frame is needed. 1472 */ 1473void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1474 const void *frame, size_t frame_len, 1475 const struct ieee80211_tx_info *frame_txctl, 1476 struct ieee80211_rts *rts); 1477 1478/** 1479 * ieee80211_rts_duration - Get the duration field for an RTS frame 1480 * @hw: pointer obtained from ieee80211_alloc_hw(). 1481 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1482 * @frame_len: the length of the frame that is going to be protected by the RTS. 1483 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1484 * 1485 * If the RTS is generated in firmware, but the host system must provide 1486 * the duration field, the low-level driver uses this function to receive 1487 * the duration field value in little-endian byteorder. 1488 */ 1489__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1490 struct ieee80211_vif *vif, size_t frame_len, 1491 const struct ieee80211_tx_info *frame_txctl); 1492 1493/** 1494 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1495 * @hw: pointer obtained from ieee80211_alloc_hw(). 1496 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1497 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1498 * @frame_len: the frame length (in octets). 1499 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1500 * @cts: The buffer where to store the CTS-to-self frame. 1501 * 1502 * If the CTS-to-self frames are generated by the host system (i.e., not in 1503 * hardware/firmware), the low-level driver uses this function to receive 1504 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1505 * for calling this function before and CTS-to-self frame is needed. 1506 */ 1507void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1508 struct ieee80211_vif *vif, 1509 const void *frame, size_t frame_len, 1510 const struct ieee80211_tx_info *frame_txctl, 1511 struct ieee80211_cts *cts); 1512 1513/** 1514 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1515 * @hw: pointer obtained from ieee80211_alloc_hw(). 1516 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1517 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1518 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1519 * 1520 * If the CTS-to-self is generated in firmware, but the host system must provide 1521 * the duration field, the low-level driver uses this function to receive 1522 * the duration field value in little-endian byteorder. 1523 */ 1524__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1525 struct ieee80211_vif *vif, 1526 size_t frame_len, 1527 const struct ieee80211_tx_info *frame_txctl); 1528 1529/** 1530 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1531 * @hw: pointer obtained from ieee80211_alloc_hw(). 1532 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1533 * @frame_len: the length of the frame. 1534 * @rate: the rate at which the frame is going to be transmitted. 1535 * 1536 * Calculate the duration field of some generic frame, given its 1537 * length and transmission rate (in 100kbps). 1538 */ 1539__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1540 struct ieee80211_vif *vif, 1541 size_t frame_len, 1542 struct ieee80211_rate *rate); 1543 1544/** 1545 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1546 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1547 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1548 * @control: will be filled with information needed to send returned frame. 1549 * 1550 * Function for accessing buffered broadcast and multicast frames. If 1551 * hardware/firmware does not implement buffering of broadcast/multicast 1552 * frames when power saving is used, 802.11 code buffers them in the host 1553 * memory. The low-level driver uses this function to fetch next buffered 1554 * frame. In most cases, this is used when generating beacon frame. This 1555 * function returns a pointer to the next buffered skb or NULL if no more 1556 * buffered frames are available. 1557 * 1558 * Note: buffered frames are returned only after DTIM beacon frame was 1559 * generated with ieee80211_beacon_get() and the low-level driver must thus 1560 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1561 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1562 * does not need to check for DTIM beacons separately and should be able to 1563 * use common code for all beacons. 1564 */ 1565struct sk_buff * 1566ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 1567 1568/** 1569 * ieee80211_get_hdrlen_from_skb - get header length from data 1570 * 1571 * Given an skb with a raw 802.11 header at the data pointer this function 1572 * returns the 802.11 header length in bytes (not including encryption 1573 * headers). If the data in the sk_buff is too short to contain a valid 802.11 1574 * header the function returns 0. 1575 * 1576 * @skb: the frame 1577 */ 1578unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb); 1579 1580/** 1581 * ieee80211_hdrlen - get header length in bytes from frame control 1582 * @fc: frame control field in little-endian format 1583 */ 1584unsigned int ieee80211_hdrlen(__le16 fc); 1585 1586/** 1587 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1588 * 1589 * This function computes a TKIP rc4 key for an skb. It computes 1590 * a phase 1 key if needed (iv16 wraps around). This function is to 1591 * be used by drivers which can do HW encryption but need to compute 1592 * to phase 1/2 key in SW. 1593 * 1594 * @keyconf: the parameter passed with the set key 1595 * @skb: the skb for which the key is needed 1596 * @rc4key: a buffer to which the key will be written 1597 * @type: TBD 1598 * @key: TBD 1599 */ 1600void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1601 struct sk_buff *skb, 1602 enum ieee80211_tkip_key_type type, u8 *key); 1603/** 1604 * ieee80211_wake_queue - wake specific queue 1605 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1606 * @queue: queue number (counted from zero). 1607 * 1608 * Drivers should use this function instead of netif_wake_queue. 1609 */ 1610void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1611 1612/** 1613 * ieee80211_stop_queue - stop specific queue 1614 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1615 * @queue: queue number (counted from zero). 1616 * 1617 * Drivers should use this function instead of netif_stop_queue. 1618 */ 1619void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1620 1621/** 1622 * ieee80211_queue_stopped - test status of the queue 1623 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1624 * @queue: queue number (counted from zero). 1625 * 1626 * Drivers should use this function instead of netif_stop_queue. 1627 */ 1628 1629int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 1630 1631/** 1632 * ieee80211_stop_queues - stop all queues 1633 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1634 * 1635 * Drivers should use this function instead of netif_stop_queue. 1636 */ 1637void ieee80211_stop_queues(struct ieee80211_hw *hw); 1638 1639/** 1640 * ieee80211_wake_queues - wake all queues 1641 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1642 * 1643 * Drivers should use this function instead of netif_wake_queue. 1644 */ 1645void ieee80211_wake_queues(struct ieee80211_hw *hw); 1646 1647/** 1648 * ieee80211_scan_completed - completed hardware scan 1649 * 1650 * When hardware scan offload is used (i.e. the hw_scan() callback is 1651 * assigned) this function needs to be called by the driver to notify 1652 * mac80211 that the scan finished. 1653 * 1654 * @hw: the hardware that finished the scan 1655 */ 1656void ieee80211_scan_completed(struct ieee80211_hw *hw); 1657 1658/** 1659 * ieee80211_iterate_active_interfaces - iterate active interfaces 1660 * 1661 * This function iterates over the interfaces associated with a given 1662 * hardware that are currently active and calls the callback for them. 1663 * This function allows the iterator function to sleep, when the iterator 1664 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 1665 * be used. 1666 * 1667 * @hw: the hardware struct of which the interfaces should be iterated over 1668 * @iterator: the iterator function to call 1669 * @data: first argument of the iterator function 1670 */ 1671void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1672 void (*iterator)(void *data, u8 *mac, 1673 struct ieee80211_vif *vif), 1674 void *data); 1675 1676/** 1677 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 1678 * 1679 * This function iterates over the interfaces associated with a given 1680 * hardware that are currently active and calls the callback for them. 1681 * This function requires the iterator callback function to be atomic, 1682 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 1683 * 1684 * @hw: the hardware struct of which the interfaces should be iterated over 1685 * @iterator: the iterator function to call, cannot sleep 1686 * @data: first argument of the iterator function 1687 */ 1688void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 1689 void (*iterator)(void *data, 1690 u8 *mac, 1691 struct ieee80211_vif *vif), 1692 void *data); 1693 1694/** 1695 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 1696 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1697 * @ra: receiver address of the BA session recipient 1698 * @tid: the TID to BA on. 1699 * @return: success if addBA request was sent, failure otherwise 1700 * 1701 * Although mac80211/low level driver/user space application can estimate 1702 * the need to start aggregation on a certain RA/TID, the session level 1703 * will be managed by the mac80211. 1704 */ 1705int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1706 1707/** 1708 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 1709 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1710 * @ra: receiver address of the BA session recipient. 1711 * @tid: the TID to BA on. 1712 * 1713 * This function must be called by low level driver once it has 1714 * finished with preparations for the BA session. 1715 */ 1716void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 1717 1718/** 1719 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 1720 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1721 * @ra: receiver address of the BA session recipient. 1722 * @tid: the TID to BA on. 1723 * 1724 * This function must be called by low level driver once it has 1725 * finished with preparations for the BA session. 1726 * This version of the function is IRQ-safe. 1727 */ 1728void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1729 u16 tid); 1730 1731/** 1732 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 1733 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1734 * @ra: receiver address of the BA session recipient 1735 * @tid: the TID to stop BA. 1736 * @initiator: if indicates initiator DELBA frame will be sent. 1737 * @return: error if no sta with matching da found, success otherwise 1738 * 1739 * Although mac80211/low level driver/user space application can estimate 1740 * the need to stop aggregation on a certain RA/TID, the session level 1741 * will be managed by the mac80211. 1742 */ 1743int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 1744 u8 *ra, u16 tid, 1745 enum ieee80211_back_parties initiator); 1746 1747/** 1748 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 1749 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1750 * @ra: receiver address of the BA session recipient. 1751 * @tid: the desired TID to BA on. 1752 * 1753 * This function must be called by low level driver once it has 1754 * finished with preparations for the BA session tear down. 1755 */ 1756void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 1757 1758/** 1759 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 1760 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1761 * @ra: receiver address of the BA session recipient. 1762 * @tid: the desired TID to BA on. 1763 * 1764 * This function must be called by low level driver once it has 1765 * finished with preparations for the BA session tear down. 1766 * This version of the function is IRQ-safe. 1767 */ 1768void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 1769 u16 tid); 1770 1771/** 1772 * ieee80211_notify_mac - low level driver notification 1773 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1774 * @notif_type: enum ieee80211_notification_types 1775 * 1776 * This function must be called by low level driver to inform mac80211 of 1777 * low level driver status change or force mac80211 to re-assoc for low 1778 * level driver internal error that require re-assoc. 1779 */ 1780void ieee80211_notify_mac(struct ieee80211_hw *hw, 1781 enum ieee80211_notification_types notif_type); 1782#endif /* MAC80211_H */ 1783