mac80211.h revision 3ac64beecd27400d12cc7afb4108eef26c499f6a
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2008 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/cfg80211.h> 23 24/** 25 * DOC: Introduction 26 * 27 * mac80211 is the Linux stack for 802.11 hardware that implements 28 * only partial functionality in hard- or firmware. This document 29 * defines the interface between mac80211 and low-level hardware 30 * drivers. 31 */ 32 33/** 34 * DOC: Calling mac80211 from interrupts 35 * 36 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 37 * called in hardware interrupt context. The low-level driver must not call any 38 * other functions in hardware interrupt context. If there is a need for such 39 * call, the low-level driver should first ACK the interrupt and perform the 40 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 41 * tasklet function. 42 * 43 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 44 * use the non-IRQ-safe functions! 45 */ 46 47/** 48 * DOC: Warning 49 * 50 * If you're reading this document and not the header file itself, it will 51 * be incomplete because not all documentation has been converted yet. 52 */ 53 54/** 55 * DOC: Frame format 56 * 57 * As a general rule, when frames are passed between mac80211 and the driver, 58 * they start with the IEEE 802.11 header and include the same octets that are 59 * sent over the air except for the FCS which should be calculated by the 60 * hardware. 61 * 62 * There are, however, various exceptions to this rule for advanced features: 63 * 64 * The first exception is for hardware encryption and decryption offload 65 * where the IV/ICV may or may not be generated in hardware. 66 * 67 * Secondly, when the hardware handles fragmentation, the frame handed to 68 * the driver from mac80211 is the MSDU, not the MPDU. 69 * 70 * Finally, for received frames, the driver is able to indicate that it has 71 * filled a radiotap header and put that in front of the frame; if it does 72 * not do so then mac80211 may add this under certain circumstances. 73 */ 74 75/** 76 * DOC: mac80211 workqueue 77 * 78 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 79 * The workqueue is a single threaded workqueue and can only be accessed by 80 * helpers for sanity checking. Drivers must ensure all work added onto the 81 * mac80211 workqueue should be cancelled on the driver stop() callback. 82 * 83 * mac80211 will flushed the workqueue upon interface removal and during 84 * suspend. 85 * 86 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 87 * 88 */ 89 90/** 91 * enum ieee80211_max_queues - maximum number of queues 92 * 93 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 94 */ 95enum ieee80211_max_queues { 96 IEEE80211_MAX_QUEUES = 4, 97}; 98 99/** 100 * struct ieee80211_tx_queue_params - transmit queue configuration 101 * 102 * The information provided in this structure is required for QoS 103 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 104 * 105 * @aifs: arbitration interframe space [0..255] 106 * @cw_min: minimum contention window [a value of the form 107 * 2^n-1 in the range 1..32767] 108 * @cw_max: maximum contention window [like @cw_min] 109 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 110 */ 111struct ieee80211_tx_queue_params { 112 u16 txop; 113 u16 cw_min; 114 u16 cw_max; 115 u8 aifs; 116}; 117 118/** 119 * struct ieee80211_tx_queue_stats - transmit queue statistics 120 * 121 * @len: number of packets in queue 122 * @limit: queue length limit 123 * @count: number of frames sent 124 */ 125struct ieee80211_tx_queue_stats { 126 unsigned int len; 127 unsigned int limit; 128 unsigned int count; 129}; 130 131struct ieee80211_low_level_stats { 132 unsigned int dot11ACKFailureCount; 133 unsigned int dot11RTSFailureCount; 134 unsigned int dot11FCSErrorCount; 135 unsigned int dot11RTSSuccessCount; 136}; 137 138/** 139 * enum ieee80211_bss_change - BSS change notification flags 140 * 141 * These flags are used with the bss_info_changed() callback 142 * to indicate which BSS parameter changed. 143 * 144 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 145 * also implies a change in the AID. 146 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 147 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 148 * @BSS_CHANGED_ERP_SLOT: slot timing changed 149 * @BSS_CHANGED_HT: 802.11n parameters changed 150 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 151 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 152 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 153 * reason (IBSS and managed mode) 154 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 155 * new beacon (beaconing modes) 156 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 157 * enabled/disabled (beaconing modes) 158 */ 159enum ieee80211_bss_change { 160 BSS_CHANGED_ASSOC = 1<<0, 161 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 162 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 163 BSS_CHANGED_ERP_SLOT = 1<<3, 164 BSS_CHANGED_HT = 1<<4, 165 BSS_CHANGED_BASIC_RATES = 1<<5, 166 BSS_CHANGED_BEACON_INT = 1<<6, 167 BSS_CHANGED_BSSID = 1<<7, 168 BSS_CHANGED_BEACON = 1<<8, 169 BSS_CHANGED_BEACON_ENABLED = 1<<9, 170}; 171 172/** 173 * struct ieee80211_bss_conf - holds the BSS's changing parameters 174 * 175 * This structure keeps information about a BSS (and an association 176 * to that BSS) that can change during the lifetime of the BSS. 177 * 178 * @assoc: association status 179 * @aid: association ID number, valid only when @assoc is true 180 * @use_cts_prot: use CTS protection 181 * @use_short_preamble: use 802.11b short preamble; 182 * if the hardware cannot handle this it must set the 183 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 184 * @use_short_slot: use short slot time (only relevant for ERP); 185 * if the hardware cannot handle this it must set the 186 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 187 * @dtim_period: num of beacons before the next DTIM, for PSM 188 * @timestamp: beacon timestamp 189 * @beacon_int: beacon interval 190 * @assoc_capability: capabilities taken from assoc resp 191 * @basic_rates: bitmap of basic rates, each bit stands for an 192 * index into the rate table configured by the driver in 193 * the current band. 194 * @bssid: The BSSID for this BSS 195 * @enable_beacon: whether beaconing should be enabled or not 196 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 197 * This field is only valid when the channel type is one of the HT types. 198 */ 199struct ieee80211_bss_conf { 200 const u8 *bssid; 201 /* association related data */ 202 bool assoc; 203 u16 aid; 204 /* erp related data */ 205 bool use_cts_prot; 206 bool use_short_preamble; 207 bool use_short_slot; 208 bool enable_beacon; 209 u8 dtim_period; 210 u16 beacon_int; 211 u16 assoc_capability; 212 u64 timestamp; 213 u32 basic_rates; 214 u16 ht_operation_mode; 215}; 216 217/** 218 * enum mac80211_tx_control_flags - flags to describe transmission information/status 219 * 220 * These flags are used with the @flags member of &ieee80211_tx_info. 221 * 222 * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. 223 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 224 * number to this frame, taking care of not overwriting the fragment 225 * number and increasing the sequence number only when the 226 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 227 * assign sequence numbers to QoS-data frames but cannot do so correctly 228 * for non-QoS-data and management frames because beacons need them from 229 * that counter as well and mac80211 cannot guarantee proper sequencing. 230 * If this flag is set, the driver should instruct the hardware to 231 * assign a sequence number to the frame or assign one itself. Cf. IEEE 232 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 233 * beacons and always be clear for frames without a sequence number field. 234 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 235 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 236 * station 237 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 238 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 239 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 240 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 241 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 242 * because the destination STA was in powersave mode. Note that to 243 * avoid race conditions, the filter must be set by the hardware or 244 * firmware upon receiving a frame that indicates that the station 245 * went to sleep (must be done on device to filter frames already on 246 * the queue) and may only be unset after mac80211 gives the OK for 247 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 248 * since only then is it guaranteed that no more frames are in the 249 * hardware queue. 250 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 251 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 252 * is for the whole aggregation. 253 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 254 * so consider using block ack request (BAR). 255 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 256 * set by rate control algorithms to indicate probe rate, will 257 * be cleared for fragmented frames (except on the last fragment) 258 * @IEEE80211_TX_INTFL_RCALGO: mac80211 internal flag, do not test or 259 * set this flag in the driver; indicates that the rate control 260 * algorithm was used and should be notified of TX status 261 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 262 * used to indicate that a pending frame requires TX processing before 263 * it can be sent out. 264 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 265 * used to indicate that a frame was already retried due to PS 266 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 267 * used to indicate frame should not be encrypted 268 * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) 269 * This frame is a response to a PS-poll frame and should be sent 270 * although the station is in powersave mode. 271 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 272 * transmit function after the current frame, this can be used 273 * by drivers to kick the DMA queue only if unset or when the 274 * queue gets full. 275 */ 276enum mac80211_tx_control_flags { 277 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 278 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 279 IEEE80211_TX_CTL_NO_ACK = BIT(2), 280 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 281 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 282 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 283 IEEE80211_TX_CTL_AMPDU = BIT(6), 284 IEEE80211_TX_CTL_INJECTED = BIT(7), 285 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 286 IEEE80211_TX_STAT_ACK = BIT(9), 287 IEEE80211_TX_STAT_AMPDU = BIT(10), 288 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 289 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 290 IEEE80211_TX_INTFL_RCALGO = BIT(13), 291 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 292 IEEE80211_TX_INTFL_RETRIED = BIT(15), 293 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 294 IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), 295 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 296}; 297 298/** 299 * enum mac80211_rate_control_flags - per-rate flags set by the 300 * Rate Control algorithm. 301 * 302 * These flags are set by the Rate control algorithm for each rate during tx, 303 * in the @flags member of struct ieee80211_tx_rate. 304 * 305 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 306 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 307 * This is set if the current BSS requires ERP protection. 308 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 309 * @IEEE80211_TX_RC_MCS: HT rate. 310 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 311 * Greenfield mode. 312 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 313 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 314 * adjacent 20 MHz channels, if the current channel type is 315 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 316 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 317 */ 318enum mac80211_rate_control_flags { 319 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 320 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 321 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 322 323 /* rate index is an MCS rate number instead of an index */ 324 IEEE80211_TX_RC_MCS = BIT(3), 325 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 326 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 327 IEEE80211_TX_RC_DUP_DATA = BIT(6), 328 IEEE80211_TX_RC_SHORT_GI = BIT(7), 329}; 330 331 332/* there are 40 bytes if you don't need the rateset to be kept */ 333#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 334 335/* if you do need the rateset, then you have less space */ 336#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 337 338/* maximum number of rate stages */ 339#define IEEE80211_TX_MAX_RATES 5 340 341/** 342 * struct ieee80211_tx_rate - rate selection/status 343 * 344 * @idx: rate index to attempt to send with 345 * @flags: rate control flags (&enum mac80211_rate_control_flags) 346 * @count: number of tries in this rate before going to the next rate 347 * 348 * A value of -1 for @idx indicates an invalid rate and, if used 349 * in an array of retry rates, that no more rates should be tried. 350 * 351 * When used for transmit status reporting, the driver should 352 * always report the rate along with the flags it used. 353 * 354 * &struct ieee80211_tx_info contains an array of these structs 355 * in the control information, and it will be filled by the rate 356 * control algorithm according to what should be sent. For example, 357 * if this array contains, in the format { <idx>, <count> } the 358 * information 359 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 360 * then this means that the frame should be transmitted 361 * up to twice at rate 3, up to twice at rate 2, and up to four 362 * times at rate 1 if it doesn't get acknowledged. Say it gets 363 * acknowledged by the peer after the fifth attempt, the status 364 * information should then contain 365 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 366 * since it was transmitted twice at rate 3, twice at rate 2 367 * and once at rate 1 after which we received an acknowledgement. 368 */ 369struct ieee80211_tx_rate { 370 s8 idx; 371 u8 count; 372 u8 flags; 373} __attribute__((packed)); 374 375/** 376 * struct ieee80211_tx_info - skb transmit information 377 * 378 * This structure is placed in skb->cb for three uses: 379 * (1) mac80211 TX control - mac80211 tells the driver what to do 380 * (2) driver internal use (if applicable) 381 * (3) TX status information - driver tells mac80211 what happened 382 * 383 * The TX control's sta pointer is only valid during the ->tx call, 384 * it may be NULL. 385 * 386 * @flags: transmit info flags, defined above 387 * @band: the band to transmit on (use for checking for races) 388 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 389 * @pad: padding, ignore 390 * @control: union for control data 391 * @status: union for status data 392 * @driver_data: array of driver_data pointers 393 * @ampdu_ack_len: number of aggregated frames. 394 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 395 * @ampdu_ack_map: block ack bit map for the aggregation. 396 * relevant only if IEEE80211_TX_STATUS_AMPDU was set. 397 * @ack_signal: signal strength of the ACK frame 398 */ 399struct ieee80211_tx_info { 400 /* common information */ 401 u32 flags; 402 u8 band; 403 404 u8 antenna_sel_tx; 405 406 /* 2 byte hole */ 407 u8 pad[2]; 408 409 union { 410 struct { 411 union { 412 /* rate control */ 413 struct { 414 struct ieee80211_tx_rate rates[ 415 IEEE80211_TX_MAX_RATES]; 416 s8 rts_cts_rate_idx; 417 }; 418 /* only needed before rate control */ 419 unsigned long jiffies; 420 }; 421 /* NB: vif can be NULL for injected frames */ 422 struct ieee80211_vif *vif; 423 struct ieee80211_key_conf *hw_key; 424 struct ieee80211_sta *sta; 425 } control; 426 struct { 427 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 428 u8 ampdu_ack_len; 429 u64 ampdu_ack_map; 430 int ack_signal; 431 /* 8 bytes free */ 432 } status; 433 struct { 434 struct ieee80211_tx_rate driver_rates[ 435 IEEE80211_TX_MAX_RATES]; 436 void *rate_driver_data[ 437 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 438 }; 439 void *driver_data[ 440 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 441 }; 442}; 443 444static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 445{ 446 return (struct ieee80211_tx_info *)skb->cb; 447} 448 449static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 450{ 451 return (struct ieee80211_rx_status *)skb->cb; 452} 453 454/** 455 * ieee80211_tx_info_clear_status - clear TX status 456 * 457 * @info: The &struct ieee80211_tx_info to be cleared. 458 * 459 * When the driver passes an skb back to mac80211, it must report 460 * a number of things in TX status. This function clears everything 461 * in the TX status but the rate control information (it does clear 462 * the count since you need to fill that in anyway). 463 * 464 * NOTE: You can only use this function if you do NOT use 465 * info->driver_data! Use info->rate_driver_data 466 * instead if you need only the less space that allows. 467 */ 468static inline void 469ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 470{ 471 int i; 472 473 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 474 offsetof(struct ieee80211_tx_info, control.rates)); 475 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 476 offsetof(struct ieee80211_tx_info, driver_rates)); 477 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 478 /* clear the rate counts */ 479 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 480 info->status.rates[i].count = 0; 481 482 BUILD_BUG_ON( 483 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 484 memset(&info->status.ampdu_ack_len, 0, 485 sizeof(struct ieee80211_tx_info) - 486 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 487} 488 489 490/** 491 * enum mac80211_rx_flags - receive flags 492 * 493 * These flags are used with the @flag member of &struct ieee80211_rx_status. 494 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 495 * Use together with %RX_FLAG_MMIC_STRIPPED. 496 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 497 * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. 498 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 499 * verification has been done by the hardware. 500 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 501 * If this flag is set, the stack cannot do any replay detection 502 * hence the driver or hardware will have to do that. 503 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 504 * the frame. 505 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 506 * the frame. 507 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 508 * is valid. This is useful in monitor mode and necessary for beacon frames 509 * to enable IBSS merging. 510 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 511 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 512 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 513 * @RX_FLAG_SHORT_GI: Short guard interval was used 514 */ 515enum mac80211_rx_flags { 516 RX_FLAG_MMIC_ERROR = 1<<0, 517 RX_FLAG_DECRYPTED = 1<<1, 518 RX_FLAG_RADIOTAP = 1<<2, 519 RX_FLAG_MMIC_STRIPPED = 1<<3, 520 RX_FLAG_IV_STRIPPED = 1<<4, 521 RX_FLAG_FAILED_FCS_CRC = 1<<5, 522 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 523 RX_FLAG_TSFT = 1<<7, 524 RX_FLAG_SHORTPRE = 1<<8, 525 RX_FLAG_HT = 1<<9, 526 RX_FLAG_40MHZ = 1<<10, 527 RX_FLAG_SHORT_GI = 1<<11, 528}; 529 530/** 531 * struct ieee80211_rx_status - receive status 532 * 533 * The low-level driver should provide this information (the subset 534 * supported by hardware) to the 802.11 code with each received 535 * frame, in the skb's control buffer (cb). 536 * 537 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 538 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 539 * @band: the active band when this frame was received 540 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 541 * @signal: signal strength when receiving this frame, either in dBm, in dB or 542 * unspecified depending on the hardware capabilities flags 543 * @IEEE80211_HW_SIGNAL_* 544 * @noise: noise when receiving this frame, in dBm. 545 * @qual: overall signal quality indication, in percent (0-100). 546 * @antenna: antenna used 547 * @rate_idx: index of data rate into band's supported rates or MCS index if 548 * HT rates are use (RX_FLAG_HT) 549 * @flag: %RX_FLAG_* 550 */ 551struct ieee80211_rx_status { 552 u64 mactime; 553 enum ieee80211_band band; 554 int freq; 555 int signal; 556 int noise; 557 int qual; 558 int antenna; 559 int rate_idx; 560 int flag; 561}; 562 563/** 564 * enum ieee80211_conf_flags - configuration flags 565 * 566 * Flags to define PHY configuration options 567 * 568 * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) 569 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only) 570 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 571 * the driver should be prepared to handle configuration requests but 572 * may turn the device off as much as possible. Typically, this flag will 573 * be set when an interface is set UP but not associated or scanning, but 574 * it can also be unset in that case when monitor interfaces are active. 575 */ 576enum ieee80211_conf_flags { 577 IEEE80211_CONF_RADIOTAP = (1<<0), 578 IEEE80211_CONF_PS = (1<<1), 579 IEEE80211_CONF_IDLE = (1<<2), 580}; 581 582 583/** 584 * enum ieee80211_conf_changed - denotes which configuration changed 585 * 586 * @_IEEE80211_CONF_CHANGE_RADIO_ENABLED: DEPRECATED 587 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 588 * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed 589 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 590 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 591 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 592 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 593 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 594 */ 595enum ieee80211_conf_changed { 596 _IEEE80211_CONF_CHANGE_RADIO_ENABLED = BIT(0), 597 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 598 IEEE80211_CONF_CHANGE_RADIOTAP = BIT(3), 599 IEEE80211_CONF_CHANGE_PS = BIT(4), 600 IEEE80211_CONF_CHANGE_POWER = BIT(5), 601 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 602 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 603 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 604}; 605 606static inline __deprecated enum ieee80211_conf_changed 607__IEEE80211_CONF_CHANGE_RADIO_ENABLED(void) 608{ 609 return _IEEE80211_CONF_CHANGE_RADIO_ENABLED; 610} 611#define IEEE80211_CONF_CHANGE_RADIO_ENABLED \ 612 __IEEE80211_CONF_CHANGE_RADIO_ENABLED() 613 614/** 615 * struct ieee80211_conf - configuration of the device 616 * 617 * This struct indicates how the driver shall configure the hardware. 618 * 619 * @flags: configuration flags defined above 620 * 621 * @radio_enabled: when zero, driver is required to switch off the radio. 622 * @beacon_int: DEPRECATED, DO NOT USE 623 * 624 * @listen_interval: listen interval in units of beacon interval 625 * @max_sleep_period: the maximum number of beacon intervals to sleep for 626 * before checking the beacon for a TIM bit (managed mode only); this 627 * value will be only achievable between DTIM frames, the hardware 628 * needs to check for the multicast traffic bit in DTIM beacons. 629 * This variable is valid only when the CONF_PS flag is set. 630 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 631 * powersave documentation below. This variable is valid only when 632 * the CONF_PS flag is set. 633 * 634 * @power_level: requested transmit power (in dBm) 635 * 636 * @channel: the channel to tune to 637 * @channel_type: the channel (HT) type 638 * 639 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 640 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 641 * but actually means the number of transmissions not the number of retries 642 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 643 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 644 * number of transmissions not the number of retries 645 */ 646struct ieee80211_conf { 647 int __deprecated beacon_int; 648 u32 flags; 649 int power_level, dynamic_ps_timeout; 650 int max_sleep_period; 651 652 u16 listen_interval; 653 bool __deprecated radio_enabled; 654 655 u8 long_frame_max_tx_count, short_frame_max_tx_count; 656 657 struct ieee80211_channel *channel; 658 enum nl80211_channel_type channel_type; 659}; 660 661/** 662 * struct ieee80211_vif - per-interface data 663 * 664 * Data in this structure is continually present for driver 665 * use during the life of a virtual interface. 666 * 667 * @type: type of this virtual interface 668 * @bss_conf: BSS configuration for this interface, either our own 669 * or the BSS we're associated to 670 * @drv_priv: data area for driver use, will always be aligned to 671 * sizeof(void *). 672 */ 673struct ieee80211_vif { 674 enum nl80211_iftype type; 675 struct ieee80211_bss_conf bss_conf; 676 /* must be last */ 677 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 678}; 679 680static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 681{ 682#ifdef CONFIG_MAC80211_MESH 683 return vif->type == NL80211_IFTYPE_MESH_POINT; 684#endif 685 return false; 686} 687 688/** 689 * struct ieee80211_if_init_conf - initial configuration of an interface 690 * 691 * @vif: pointer to a driver-use per-interface structure. The pointer 692 * itself is also used for various functions including 693 * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). 694 * @type: one of &enum nl80211_iftype constants. Determines the type of 695 * added/removed interface. 696 * @mac_addr: pointer to MAC address of the interface. This pointer is valid 697 * until the interface is removed (i.e. it cannot be used after 698 * remove_interface() callback was called for this interface). 699 * 700 * This structure is used in add_interface() and remove_interface() 701 * callbacks of &struct ieee80211_hw. 702 * 703 * When you allow multiple interfaces to be added to your PHY, take care 704 * that the hardware can actually handle multiple MAC addresses. However, 705 * also take care that when there's no interface left with mac_addr != %NULL 706 * you remove the MAC address from the device to avoid acknowledging packets 707 * in pure monitor mode. 708 */ 709struct ieee80211_if_init_conf { 710 enum nl80211_iftype type; 711 struct ieee80211_vif *vif; 712 void *mac_addr; 713}; 714 715/** 716 * enum ieee80211_key_alg - key algorithm 717 * @ALG_WEP: WEP40 or WEP104 718 * @ALG_TKIP: TKIP 719 * @ALG_CCMP: CCMP (AES) 720 * @ALG_AES_CMAC: AES-128-CMAC 721 */ 722enum ieee80211_key_alg { 723 ALG_WEP, 724 ALG_TKIP, 725 ALG_CCMP, 726 ALG_AES_CMAC, 727}; 728 729/** 730 * enum ieee80211_key_flags - key flags 731 * 732 * These flags are used for communication about keys between the driver 733 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 734 * 735 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 736 * that the STA this key will be used with could be using QoS. 737 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 738 * driver to indicate that it requires IV generation for this 739 * particular key. 740 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 741 * the driver for a TKIP key if it requires Michael MIC 742 * generation in software. 743 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 744 * that the key is pairwise rather then a shared key. 745 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 746 * CCMP key if it requires CCMP encryption of management frames (MFP) to 747 * be done in software. 748 */ 749enum ieee80211_key_flags { 750 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 751 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 752 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 753 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 754 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 755}; 756 757/** 758 * struct ieee80211_key_conf - key information 759 * 760 * This key information is given by mac80211 to the driver by 761 * the set_key() callback in &struct ieee80211_ops. 762 * 763 * @hw_key_idx: To be set by the driver, this is the key index the driver 764 * wants to be given when a frame is transmitted and needs to be 765 * encrypted in hardware. 766 * @alg: The key algorithm. 767 * @flags: key flags, see &enum ieee80211_key_flags. 768 * @keyidx: the key index (0-3) 769 * @keylen: key material length 770 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 771 * data block: 772 * - Temporal Encryption Key (128 bits) 773 * - Temporal Authenticator Tx MIC Key (64 bits) 774 * - Temporal Authenticator Rx MIC Key (64 bits) 775 * @icv_len: The ICV length for this key type 776 * @iv_len: The IV length for this key type 777 */ 778struct ieee80211_key_conf { 779 enum ieee80211_key_alg alg; 780 u8 icv_len; 781 u8 iv_len; 782 u8 hw_key_idx; 783 u8 flags; 784 s8 keyidx; 785 u8 keylen; 786 u8 key[0]; 787}; 788 789/** 790 * enum set_key_cmd - key command 791 * 792 * Used with the set_key() callback in &struct ieee80211_ops, this 793 * indicates whether a key is being removed or added. 794 * 795 * @SET_KEY: a key is set 796 * @DISABLE_KEY: a key must be disabled 797 */ 798enum set_key_cmd { 799 SET_KEY, DISABLE_KEY, 800}; 801 802/** 803 * struct ieee80211_sta - station table entry 804 * 805 * A station table entry represents a station we are possibly 806 * communicating with. Since stations are RCU-managed in 807 * mac80211, any ieee80211_sta pointer you get access to must 808 * either be protected by rcu_read_lock() explicitly or implicitly, 809 * or you must take good care to not use such a pointer after a 810 * call to your sta_notify callback that removed it. 811 * 812 * @addr: MAC address 813 * @aid: AID we assigned to the station if we're an AP 814 * @supp_rates: Bitmap of supported rates (per band) 815 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 816 * @drv_priv: data area for driver use, will always be aligned to 817 * sizeof(void *), size is determined in hw information. 818 */ 819struct ieee80211_sta { 820 u32 supp_rates[IEEE80211_NUM_BANDS]; 821 u8 addr[ETH_ALEN]; 822 u16 aid; 823 struct ieee80211_sta_ht_cap ht_cap; 824 825 /* must be last */ 826 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 827}; 828 829/** 830 * enum sta_notify_cmd - sta notify command 831 * 832 * Used with the sta_notify() callback in &struct ieee80211_ops, this 833 * indicates addition and removal of a station to station table, 834 * or if a associated station made a power state transition. 835 * 836 * @STA_NOTIFY_ADD: a station was added to the station table 837 * @STA_NOTIFY_REMOVE: a station being removed from the station table 838 * @STA_NOTIFY_SLEEP: a station is now sleeping 839 * @STA_NOTIFY_AWAKE: a sleeping station woke up 840 */ 841enum sta_notify_cmd { 842 STA_NOTIFY_ADD, STA_NOTIFY_REMOVE, 843 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 844}; 845 846/** 847 * enum ieee80211_tkip_key_type - get tkip key 848 * 849 * Used by drivers which need to get a tkip key for skb. Some drivers need a 850 * phase 1 key, others need a phase 2 key. A single function allows the driver 851 * to get the key, this enum indicates what type of key is required. 852 * 853 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 854 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 855 */ 856enum ieee80211_tkip_key_type { 857 IEEE80211_TKIP_P1_KEY, 858 IEEE80211_TKIP_P2_KEY, 859}; 860 861/** 862 * enum ieee80211_hw_flags - hardware flags 863 * 864 * These flags are used to indicate hardware capabilities to 865 * the stack. Generally, flags here should have their meaning 866 * done in a way that the simplest hardware doesn't need setting 867 * any particular flags. There are some exceptions to this rule, 868 * however, so you are advised to review these flags carefully. 869 * 870 * @IEEE80211_HW_RX_INCLUDES_FCS: 871 * Indicates that received frames passed to the stack include 872 * the FCS at the end. 873 * 874 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 875 * Some wireless LAN chipsets buffer broadcast/multicast frames 876 * for power saving stations in the hardware/firmware and others 877 * rely on the host system for such buffering. This option is used 878 * to configure the IEEE 802.11 upper layer to buffer broadcast and 879 * multicast frames when there are power saving stations so that 880 * the driver can fetch them with ieee80211_get_buffered_bc(). 881 * 882 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 883 * Hardware is not capable of short slot operation on the 2.4 GHz band. 884 * 885 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 886 * Hardware is not capable of receiving frames with short preamble on 887 * the 2.4 GHz band. 888 * 889 * @IEEE80211_HW_SIGNAL_UNSPEC: 890 * Hardware can provide signal values but we don't know its units. We 891 * expect values between 0 and @max_signal. 892 * If possible please provide dB or dBm instead. 893 * 894 * @IEEE80211_HW_SIGNAL_DBM: 895 * Hardware gives signal values in dBm, decibel difference from 896 * one milliwatt. This is the preferred method since it is standardized 897 * between different devices. @max_signal does not need to be set. 898 * 899 * @IEEE80211_HW_NOISE_DBM: 900 * Hardware can provide noise (radio interference) values in units dBm, 901 * decibel difference from one milliwatt. 902 * 903 * @IEEE80211_HW_SPECTRUM_MGMT: 904 * Hardware supports spectrum management defined in 802.11h 905 * Measurement, Channel Switch, Quieting, TPC 906 * 907 * @IEEE80211_HW_AMPDU_AGGREGATION: 908 * Hardware supports 11n A-MPDU aggregation. 909 * 910 * @IEEE80211_HW_SUPPORTS_PS: 911 * Hardware has power save support (i.e. can go to sleep). 912 * 913 * @IEEE80211_HW_PS_NULLFUNC_STACK: 914 * Hardware requires nullfunc frame handling in stack, implies 915 * stack support for dynamic PS. 916 * 917 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 918 * Hardware has support for dynamic PS. 919 * 920 * @IEEE80211_HW_MFP_CAPABLE: 921 * Hardware supports management frame protection (MFP, IEEE 802.11w). 922 * 923 * @IEEE80211_HW_BEACON_FILTER: 924 * Hardware supports dropping of irrelevant beacon frames to 925 * avoid waking up cpu. 926 */ 927enum ieee80211_hw_flags { 928 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 929 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 930 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 931 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 932 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 933 IEEE80211_HW_SIGNAL_DBM = 1<<6, 934 IEEE80211_HW_NOISE_DBM = 1<<7, 935 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 936 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 937 IEEE80211_HW_SUPPORTS_PS = 1<<10, 938 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 939 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 940 IEEE80211_HW_MFP_CAPABLE = 1<<13, 941 IEEE80211_HW_BEACON_FILTER = 1<<14, 942}; 943 944/** 945 * struct ieee80211_hw - hardware information and state 946 * 947 * This structure contains the configuration and hardware 948 * information for an 802.11 PHY. 949 * 950 * @wiphy: This points to the &struct wiphy allocated for this 951 * 802.11 PHY. You must fill in the @perm_addr and @dev 952 * members of this structure using SET_IEEE80211_DEV() 953 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 954 * bands (with channels, bitrates) are registered here. 955 * 956 * @conf: &struct ieee80211_conf, device configuration, don't use. 957 * 958 * @priv: pointer to private area that was allocated for driver use 959 * along with this structure. 960 * 961 * @flags: hardware flags, see &enum ieee80211_hw_flags. 962 * 963 * @extra_tx_headroom: headroom to reserve in each transmit skb 964 * for use by the driver (e.g. for transmit headers.) 965 * 966 * @channel_change_time: time (in microseconds) it takes to change channels. 967 * 968 * @max_signal: Maximum value for signal (rssi) in RX information, used 969 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 970 * 971 * @max_listen_interval: max listen interval in units of beacon interval 972 * that HW supports 973 * 974 * @queues: number of available hardware transmit queues for 975 * data packets. WMM/QoS requires at least four, these 976 * queues need to have configurable access parameters. 977 * 978 * @rate_control_algorithm: rate control algorithm for this hardware. 979 * If unset (NULL), the default algorithm will be used. Must be 980 * set before calling ieee80211_register_hw(). 981 * 982 * @vif_data_size: size (in bytes) of the drv_priv data area 983 * within &struct ieee80211_vif. 984 * @sta_data_size: size (in bytes) of the drv_priv data area 985 * within &struct ieee80211_sta. 986 * 987 * @max_rates: maximum number of alternate rate retry stages 988 * @max_rate_tries: maximum number of tries for each stage 989 */ 990struct ieee80211_hw { 991 struct ieee80211_conf conf; 992 struct wiphy *wiphy; 993 const char *rate_control_algorithm; 994 void *priv; 995 u32 flags; 996 unsigned int extra_tx_headroom; 997 int channel_change_time; 998 int vif_data_size; 999 int sta_data_size; 1000 u16 queues; 1001 u16 max_listen_interval; 1002 s8 max_signal; 1003 u8 max_rates; 1004 u8 max_rate_tries; 1005}; 1006 1007/** 1008 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1009 * 1010 * @wiphy: the &struct wiphy which we want to query 1011 * 1012 * mac80211 drivers can use this to get to their respective 1013 * &struct ieee80211_hw. Drivers wishing to get to their own private 1014 * structure can then access it via hw->priv. Note that mac802111 drivers should 1015 * not use wiphy_priv() to try to get their private driver structure as this 1016 * is already used internally by mac80211. 1017 */ 1018struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1019 1020/** 1021 * SET_IEEE80211_DEV - set device for 802.11 hardware 1022 * 1023 * @hw: the &struct ieee80211_hw to set the device for 1024 * @dev: the &struct device of this 802.11 device 1025 */ 1026static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1027{ 1028 set_wiphy_dev(hw->wiphy, dev); 1029} 1030 1031/** 1032 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1033 * 1034 * @hw: the &struct ieee80211_hw to set the MAC address for 1035 * @addr: the address to set 1036 */ 1037static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1038{ 1039 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1040} 1041 1042static inline struct ieee80211_rate * 1043ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1044 const struct ieee80211_tx_info *c) 1045{ 1046 if (WARN_ON(c->control.rates[0].idx < 0)) 1047 return NULL; 1048 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1049} 1050 1051static inline struct ieee80211_rate * 1052ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1053 const struct ieee80211_tx_info *c) 1054{ 1055 if (c->control.rts_cts_rate_idx < 0) 1056 return NULL; 1057 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1058} 1059 1060static inline struct ieee80211_rate * 1061ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1062 const struct ieee80211_tx_info *c, int idx) 1063{ 1064 if (c->control.rates[idx + 1].idx < 0) 1065 return NULL; 1066 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1067} 1068 1069/** 1070 * DOC: Hardware crypto acceleration 1071 * 1072 * mac80211 is capable of taking advantage of many hardware 1073 * acceleration designs for encryption and decryption operations. 1074 * 1075 * The set_key() callback in the &struct ieee80211_ops for a given 1076 * device is called to enable hardware acceleration of encryption and 1077 * decryption. The callback takes a @sta parameter that will be NULL 1078 * for default keys or keys used for transmission only, or point to 1079 * the station information for the peer for individual keys. 1080 * Multiple transmission keys with the same key index may be used when 1081 * VLANs are configured for an access point. 1082 * 1083 * When transmitting, the TX control data will use the @hw_key_idx 1084 * selected by the driver by modifying the &struct ieee80211_key_conf 1085 * pointed to by the @key parameter to the set_key() function. 1086 * 1087 * The set_key() call for the %SET_KEY command should return 0 if 1088 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1089 * added; if you return 0 then hw_key_idx must be assigned to the 1090 * hardware key index, you are free to use the full u8 range. 1091 * 1092 * When the cmd is %DISABLE_KEY then it must succeed. 1093 * 1094 * Note that it is permissible to not decrypt a frame even if a key 1095 * for it has been uploaded to hardware, the stack will not make any 1096 * decision based on whether a key has been uploaded or not but rather 1097 * based on the receive flags. 1098 * 1099 * The &struct ieee80211_key_conf structure pointed to by the @key 1100 * parameter is guaranteed to be valid until another call to set_key() 1101 * removes it, but it can only be used as a cookie to differentiate 1102 * keys. 1103 * 1104 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1105 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1106 * handler. 1107 * The update_tkip_key() call updates the driver with the new phase 1 key. 1108 * This happens everytime the iv16 wraps around (every 65536 packets). The 1109 * set_key() call will happen only once for each key (unless the AP did 1110 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1111 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1112 * handler is software decryption with wrap around of iv16. 1113 */ 1114 1115/** 1116 * DOC: Powersave support 1117 * 1118 * mac80211 has support for various powersave implementations. 1119 * 1120 * First, it can support hardware that handles all powersaving by 1121 * itself, such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS 1122 * hardware flag. In that case, it will be told about the desired 1123 * powersave mode depending on the association status, and the driver 1124 * must take care of sending nullfunc frames when necessary, i.e. when 1125 * entering and leaving powersave mode. The driver is required to look at 1126 * the AID in beacons and signal to the AP that it woke up when it finds 1127 * traffic directed to it. This mode supports dynamic PS by simply 1128 * enabling/disabling PS. 1129 * 1130 * Additionally, such hardware may set the %IEEE80211_HW_SUPPORTS_DYNAMIC_PS 1131 * flag to indicate that it can support dynamic PS mode itself (see below). 1132 * 1133 * Other hardware designs cannot send nullfunc frames by themselves and also 1134 * need software support for parsing the TIM bitmap. This is also supported 1135 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1136 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1137 * required to pass up beacons. The hardware is still required to handle 1138 * waking up for multicast traffic; if it cannot the driver must handle that 1139 * as best as it can, mac80211 is too slow. 1140 * 1141 * Dynamic powersave mode is an extension to normal powersave mode in which 1142 * the hardware stays awake for a user-specified period of time after sending 1143 * a frame so that reply frames need not be buffered and therefore delayed 1144 * to the next wakeup. This can either be supported by hardware, in which case 1145 * the driver needs to look at the @dynamic_ps_timeout hardware configuration 1146 * value, or by the stack if all nullfunc handling is in the stack. 1147 */ 1148 1149/** 1150 * DOC: Beacon filter support 1151 * 1152 * Some hardware have beacon filter support to reduce host cpu wakeups 1153 * which will reduce system power consumption. It usuallly works so that 1154 * the firmware creates a checksum of the beacon but omits all constantly 1155 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1156 * beacon is forwarded to the host, otherwise it will be just dropped. That 1157 * way the host will only receive beacons where some relevant information 1158 * (for example ERP protection or WMM settings) have changed. 1159 * 1160 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER 1161 * hardware capability. The driver needs to enable beacon filter support 1162 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1163 * power save is enabled, the stack will not check for beacon loss and the 1164 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1165 * 1166 * The time (or number of beacons missed) until the firmware notifies the 1167 * driver of a beacon loss event (which in turn causes the driver to call 1168 * ieee80211_beacon_loss()) should be configurable and will be controlled 1169 * by mac80211 and the roaming algorithm in the future. 1170 * 1171 * Since there may be constantly changing information elements that nothing 1172 * in the software stack cares about, we will, in the future, have mac80211 1173 * tell the driver which information elements are interesting in the sense 1174 * that we want to see changes in them. This will include 1175 * - a list of information element IDs 1176 * - a list of OUIs for the vendor information element 1177 * 1178 * Ideally, the hardware would filter out any beacons without changes in the 1179 * requested elements, but if it cannot support that it may, at the expense 1180 * of some efficiency, filter out only a subset. For example, if the device 1181 * doesn't support checking for OUIs it should pass up all changes in all 1182 * vendor information elements. 1183 * 1184 * Note that change, for the sake of simplification, also includes information 1185 * elements appearing or disappearing from the beacon. 1186 * 1187 * Some hardware supports an "ignore list" instead, just make sure nothing 1188 * that was requested is on the ignore list, and include commonly changing 1189 * information element IDs in the ignore list, for example 11 (BSS load) and 1190 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1191 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1192 * it could also include some currently unused IDs. 1193 * 1194 * 1195 * In addition to these capabilities, hardware should support notifying the 1196 * host of changes in the beacon RSSI. This is relevant to implement roaming 1197 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1198 * the received data packets). This can consist in notifying the host when 1199 * the RSSI changes significantly or when it drops below or rises above 1200 * configurable thresholds. In the future these thresholds will also be 1201 * configured by mac80211 (which gets them from userspace) to implement 1202 * them as the roaming algorithm requires. 1203 * 1204 * If the hardware cannot implement this, the driver should ask it to 1205 * periodically pass beacon frames to the host so that software can do the 1206 * signal strength threshold checking. 1207 */ 1208 1209/** 1210 * DOC: Frame filtering 1211 * 1212 * mac80211 requires to see many management frames for proper 1213 * operation, and users may want to see many more frames when 1214 * in monitor mode. However, for best CPU usage and power consumption, 1215 * having as few frames as possible percolate through the stack is 1216 * desirable. Hence, the hardware should filter as much as possible. 1217 * 1218 * To achieve this, mac80211 uses filter flags (see below) to tell 1219 * the driver's configure_filter() function which frames should be 1220 * passed to mac80211 and which should be filtered out. 1221 * 1222 * Before configure_filter() is invoked, the prepare_multicast() 1223 * callback is invoked with the parameters @mc_count and @mc_list 1224 * for the combined multicast address list of all virtual interfaces. 1225 * It's use is optional, and it returns a u64 that is passed to 1226 * configure_filter(). Additionally, configure_filter() has the 1227 * arguments @changed_flags telling which flags were changed and 1228 * @total_flags with the new flag states. 1229 * 1230 * If your device has no multicast address filters your driver will 1231 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1232 * parameter to see whether multicast frames should be accepted 1233 * or dropped. 1234 * 1235 * All unsupported flags in @total_flags must be cleared. 1236 * Hardware does not support a flag if it is incapable of _passing_ 1237 * the frame to the stack. Otherwise the driver must ignore 1238 * the flag, but not clear it. 1239 * You must _only_ clear the flag (announce no support for the 1240 * flag to mac80211) if you are not able to pass the packet type 1241 * to the stack (so the hardware always filters it). 1242 * So for example, you should clear @FIF_CONTROL, if your hardware 1243 * always filters control frames. If your hardware always passes 1244 * control frames to the kernel and is incapable of filtering them, 1245 * you do _not_ clear the @FIF_CONTROL flag. 1246 * This rule applies to all other FIF flags as well. 1247 */ 1248 1249/** 1250 * enum ieee80211_filter_flags - hardware filter flags 1251 * 1252 * These flags determine what the filter in hardware should be 1253 * programmed to let through and what should not be passed to the 1254 * stack. It is always safe to pass more frames than requested, 1255 * but this has negative impact on power consumption. 1256 * 1257 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1258 * think of the BSS as your network segment and then this corresponds 1259 * to the regular ethernet device promiscuous mode. 1260 * 1261 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1262 * by the user or if the hardware is not capable of filtering by 1263 * multicast address. 1264 * 1265 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1266 * %RX_FLAG_FAILED_FCS_CRC for them) 1267 * 1268 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1269 * the %RX_FLAG_FAILED_PLCP_CRC for them 1270 * 1271 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1272 * to the hardware that it should not filter beacons or probe responses 1273 * by BSSID. Filtering them can greatly reduce the amount of processing 1274 * mac80211 needs to do and the amount of CPU wakeups, so you should 1275 * honour this flag if possible. 1276 * 1277 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1278 * is not set then only those addressed to this station. 1279 * 1280 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1281 * 1282 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1283 * those addressed to this station. 1284 */ 1285enum ieee80211_filter_flags { 1286 FIF_PROMISC_IN_BSS = 1<<0, 1287 FIF_ALLMULTI = 1<<1, 1288 FIF_FCSFAIL = 1<<2, 1289 FIF_PLCPFAIL = 1<<3, 1290 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1291 FIF_CONTROL = 1<<5, 1292 FIF_OTHER_BSS = 1<<6, 1293 FIF_PSPOLL = 1<<7, 1294}; 1295 1296/** 1297 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1298 * 1299 * These flags are used with the ampdu_action() callback in 1300 * &struct ieee80211_ops to indicate which action is needed. 1301 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1302 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1303 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1304 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1305 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1306 */ 1307enum ieee80211_ampdu_mlme_action { 1308 IEEE80211_AMPDU_RX_START, 1309 IEEE80211_AMPDU_RX_STOP, 1310 IEEE80211_AMPDU_TX_START, 1311 IEEE80211_AMPDU_TX_STOP, 1312 IEEE80211_AMPDU_TX_OPERATIONAL, 1313}; 1314 1315/** 1316 * struct ieee80211_ops - callbacks from mac80211 to the driver 1317 * 1318 * This structure contains various callbacks that the driver may 1319 * handle or, in some cases, must handle, for example to configure 1320 * the hardware to a new channel or to transmit a frame. 1321 * 1322 * @tx: Handler that 802.11 module calls for each transmitted frame. 1323 * skb contains the buffer starting from the IEEE 802.11 header. 1324 * The low-level driver should send the frame out based on 1325 * configuration in the TX control data. This handler should, 1326 * preferably, never fail and stop queues appropriately, more 1327 * importantly, however, it must never fail for A-MPDU-queues. 1328 * This function should return NETDEV_TX_OK except in very 1329 * limited cases. 1330 * Must be implemented and atomic. 1331 * 1332 * @start: Called before the first netdevice attached to the hardware 1333 * is enabled. This should turn on the hardware and must turn on 1334 * frame reception (for possibly enabled monitor interfaces.) 1335 * Returns negative error codes, these may be seen in userspace, 1336 * or zero. 1337 * When the device is started it should not have a MAC address 1338 * to avoid acknowledging frames before a non-monitor device 1339 * is added. 1340 * Must be implemented. 1341 * 1342 * @stop: Called after last netdevice attached to the hardware 1343 * is disabled. This should turn off the hardware (at least 1344 * it must turn off frame reception.) 1345 * May be called right after add_interface if that rejects 1346 * an interface. If you added any work onto the mac80211 workqueue 1347 * you should ensure to cancel it on this callback. 1348 * Must be implemented. 1349 * 1350 * @add_interface: Called when a netdevice attached to the hardware is 1351 * enabled. Because it is not called for monitor mode devices, @start 1352 * and @stop must be implemented. 1353 * The driver should perform any initialization it needs before 1354 * the device can be enabled. The initial configuration for the 1355 * interface is given in the conf parameter. 1356 * The callback may refuse to add an interface by returning a 1357 * negative error code (which will be seen in userspace.) 1358 * Must be implemented. 1359 * 1360 * @remove_interface: Notifies a driver that an interface is going down. 1361 * The @stop callback is called after this if it is the last interface 1362 * and no monitor interfaces are present. 1363 * When all interfaces are removed, the MAC address in the hardware 1364 * must be cleared so the device no longer acknowledges packets, 1365 * the mac_addr member of the conf structure is, however, set to the 1366 * MAC address of the device going away. 1367 * Hence, this callback must be implemented. 1368 * 1369 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1370 * function to change hardware configuration, e.g., channel. 1371 * This function should never fail but returns a negative error code 1372 * if it does. 1373 * 1374 * @bss_info_changed: Handler for configuration requests related to BSS 1375 * parameters that may vary during BSS's lifespan, and may affect low 1376 * level driver (e.g. assoc/disassoc status, erp parameters). 1377 * This function should not be used if no BSS has been set, unless 1378 * for association indication. The @changed parameter indicates which 1379 * of the bss parameters has changed when a call is made. 1380 * 1381 * @prepare_multicast: Prepare for multicast filter configuration. 1382 * This callback is optional, and its return value is passed 1383 * to configure_filter(). This callback must be atomic. 1384 * 1385 * @configure_filter: Configure the device's RX filter. 1386 * See the section "Frame filtering" for more information. 1387 * This callback must be implemented. 1388 * 1389 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1390 * must be set or cleared for a given STA. Must be atomic. 1391 * 1392 * @set_key: See the section "Hardware crypto acceleration" 1393 * This callback can sleep, and is only called between add_interface 1394 * and remove_interface calls, i.e. while the given virtual interface 1395 * is enabled. 1396 * Returns a negative error code if the key can't be added. 1397 * 1398 * @update_tkip_key: See the section "Hardware crypto acceleration" 1399 * This callback will be called in the context of Rx. Called for drivers 1400 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1401 * 1402 * @hw_scan: Ask the hardware to service the scan request, no need to start 1403 * the scan state machine in stack. The scan must honour the channel 1404 * configuration done by the regulatory agent in the wiphy's 1405 * registered bands. The hardware (or the driver) needs to make sure 1406 * that power save is disabled. 1407 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1408 * entire IEs after the SSID, so that drivers need not look at these 1409 * at all but just send them after the SSID -- mac80211 includes the 1410 * (extended) supported rates and HT information (where applicable). 1411 * When the scan finishes, ieee80211_scan_completed() must be called; 1412 * note that it also must be called when the scan cannot finish due to 1413 * any error unless this callback returned a negative error code. 1414 * 1415 * @sw_scan_start: Notifier function that is called just before a software scan 1416 * is started. Can be NULL, if the driver doesn't need this notification. 1417 * 1418 * @sw_scan_complete: Notifier function that is called just after a software scan 1419 * finished. Can be NULL, if the driver doesn't need this notification. 1420 * 1421 * @get_stats: Return low-level statistics. 1422 * Returns zero if statistics are available. 1423 * 1424 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1425 * callback should be provided to read the TKIP transmit IVs (both IV32 1426 * and IV16) for the given key from hardware. 1427 * 1428 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1429 * 1430 * @sta_notify: Notifies low level driver about addition, removal or power 1431 * state transition of an associated station, AP, IBSS/WDS/mesh peer etc. 1432 * Must be atomic. 1433 * 1434 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1435 * bursting) for a hardware TX queue. 1436 * Returns a negative error code on failure. 1437 * 1438 * @get_tx_stats: Get statistics of the current TX queue status. This is used 1439 * to get number of currently queued packets (queue length), maximum queue 1440 * size (limit), and total number of packets sent using each TX queue 1441 * (count). The 'stats' pointer points to an array that has hw->queues 1442 * items. 1443 * 1444 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1445 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1446 * required function. 1447 * 1448 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1449 * Currently, this is only used for IBSS mode debugging. Is not a 1450 * required function. 1451 * 1452 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1453 * with other STAs in the IBSS. This is only used in IBSS mode. This 1454 * function is optional if the firmware/hardware takes full care of 1455 * TSF synchronization. 1456 * 1457 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1458 * This is needed only for IBSS mode and the result of this function is 1459 * used to determine whether to reply to Probe Requests. 1460 * Returns non-zero if this device sent the last beacon. 1461 * 1462 * @ampdu_action: Perform a certain A-MPDU action 1463 * The RA/TID combination determines the destination and TID we want 1464 * the ampdu action to be performed for. The action is defined through 1465 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1466 * is the first frame we expect to perform the action on. Notice 1467 * that TX/RX_STOP can pass NULL for this parameter. 1468 * Returns a negative error code on failure. 1469 * 1470 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 1471 * need to set wiphy->rfkill_poll to %true before registration, 1472 * and need to call wiphy_rfkill_set_hw_state() in the callback. 1473 * 1474 * @testmode_cmd: Implement a cfg80211 test mode command. 1475 */ 1476struct ieee80211_ops { 1477 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1478 int (*start)(struct ieee80211_hw *hw); 1479 void (*stop)(struct ieee80211_hw *hw); 1480 int (*add_interface)(struct ieee80211_hw *hw, 1481 struct ieee80211_if_init_conf *conf); 1482 void (*remove_interface)(struct ieee80211_hw *hw, 1483 struct ieee80211_if_init_conf *conf); 1484 int (*config)(struct ieee80211_hw *hw, u32 changed); 1485 void (*bss_info_changed)(struct ieee80211_hw *hw, 1486 struct ieee80211_vif *vif, 1487 struct ieee80211_bss_conf *info, 1488 u32 changed); 1489 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 1490 int mc_count, struct dev_addr_list *mc_list); 1491 void (*configure_filter)(struct ieee80211_hw *hw, 1492 unsigned int changed_flags, 1493 unsigned int *total_flags, 1494 u64 multicast); 1495 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1496 bool set); 1497 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1498 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 1499 struct ieee80211_key_conf *key); 1500 void (*update_tkip_key)(struct ieee80211_hw *hw, 1501 struct ieee80211_key_conf *conf, const u8 *address, 1502 u32 iv32, u16 *phase1key); 1503 int (*hw_scan)(struct ieee80211_hw *hw, 1504 struct cfg80211_scan_request *req); 1505 void (*sw_scan_start)(struct ieee80211_hw *hw); 1506 void (*sw_scan_complete)(struct ieee80211_hw *hw); 1507 int (*get_stats)(struct ieee80211_hw *hw, 1508 struct ieee80211_low_level_stats *stats); 1509 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1510 u32 *iv32, u16 *iv16); 1511 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1512 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1513 enum sta_notify_cmd, struct ieee80211_sta *sta); 1514 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1515 const struct ieee80211_tx_queue_params *params); 1516 int (*get_tx_stats)(struct ieee80211_hw *hw, 1517 struct ieee80211_tx_queue_stats *stats); 1518 u64 (*get_tsf)(struct ieee80211_hw *hw); 1519 void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); 1520 void (*reset_tsf)(struct ieee80211_hw *hw); 1521 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1522 int (*ampdu_action)(struct ieee80211_hw *hw, 1523 enum ieee80211_ampdu_mlme_action action, 1524 struct ieee80211_sta *sta, u16 tid, u16 *ssn); 1525 1526 void (*rfkill_poll)(struct ieee80211_hw *hw); 1527#ifdef CONFIG_NL80211_TESTMODE 1528 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 1529#endif 1530}; 1531 1532/** 1533 * ieee80211_alloc_hw - Allocate a new hardware device 1534 * 1535 * This must be called once for each hardware device. The returned pointer 1536 * must be used to refer to this device when calling other functions. 1537 * mac80211 allocates a private data area for the driver pointed to by 1538 * @priv in &struct ieee80211_hw, the size of this area is given as 1539 * @priv_data_len. 1540 * 1541 * @priv_data_len: length of private data 1542 * @ops: callbacks for this device 1543 */ 1544struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1545 const struct ieee80211_ops *ops); 1546 1547/** 1548 * ieee80211_register_hw - Register hardware device 1549 * 1550 * You must call this function before any other functions in 1551 * mac80211. Note that before a hardware can be registered, you 1552 * need to fill the contained wiphy's information. 1553 * 1554 * @hw: the device to register as returned by ieee80211_alloc_hw() 1555 */ 1556int ieee80211_register_hw(struct ieee80211_hw *hw); 1557 1558#ifdef CONFIG_MAC80211_LEDS 1559extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1560extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1561extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1562extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1563#endif 1564/** 1565 * ieee80211_get_tx_led_name - get name of TX LED 1566 * 1567 * mac80211 creates a transmit LED trigger for each wireless hardware 1568 * that can be used to drive LEDs if your driver registers a LED device. 1569 * This function returns the name (or %NULL if not configured for LEDs) 1570 * of the trigger so you can automatically link the LED device. 1571 * 1572 * @hw: the hardware to get the LED trigger name for 1573 */ 1574static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1575{ 1576#ifdef CONFIG_MAC80211_LEDS 1577 return __ieee80211_get_tx_led_name(hw); 1578#else 1579 return NULL; 1580#endif 1581} 1582 1583/** 1584 * ieee80211_get_rx_led_name - get name of RX LED 1585 * 1586 * mac80211 creates a receive LED trigger for each wireless hardware 1587 * that can be used to drive LEDs if your driver registers a LED device. 1588 * This function returns the name (or %NULL if not configured for LEDs) 1589 * of the trigger so you can automatically link the LED device. 1590 * 1591 * @hw: the hardware to get the LED trigger name for 1592 */ 1593static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1594{ 1595#ifdef CONFIG_MAC80211_LEDS 1596 return __ieee80211_get_rx_led_name(hw); 1597#else 1598 return NULL; 1599#endif 1600} 1601 1602/** 1603 * ieee80211_get_assoc_led_name - get name of association LED 1604 * 1605 * mac80211 creates a association LED trigger for each wireless hardware 1606 * that can be used to drive LEDs if your driver registers a LED device. 1607 * This function returns the name (or %NULL if not configured for LEDs) 1608 * of the trigger so you can automatically link the LED device. 1609 * 1610 * @hw: the hardware to get the LED trigger name for 1611 */ 1612static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1613{ 1614#ifdef CONFIG_MAC80211_LEDS 1615 return __ieee80211_get_assoc_led_name(hw); 1616#else 1617 return NULL; 1618#endif 1619} 1620 1621/** 1622 * ieee80211_get_radio_led_name - get name of radio LED 1623 * 1624 * mac80211 creates a radio change LED trigger for each wireless hardware 1625 * that can be used to drive LEDs if your driver registers a LED device. 1626 * This function returns the name (or %NULL if not configured for LEDs) 1627 * of the trigger so you can automatically link the LED device. 1628 * 1629 * @hw: the hardware to get the LED trigger name for 1630 */ 1631static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1632{ 1633#ifdef CONFIG_MAC80211_LEDS 1634 return __ieee80211_get_radio_led_name(hw); 1635#else 1636 return NULL; 1637#endif 1638} 1639 1640/** 1641 * ieee80211_unregister_hw - Unregister a hardware device 1642 * 1643 * This function instructs mac80211 to free allocated resources 1644 * and unregister netdevices from the networking subsystem. 1645 * 1646 * @hw: the hardware to unregister 1647 */ 1648void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1649 1650/** 1651 * ieee80211_free_hw - free hardware descriptor 1652 * 1653 * This function frees everything that was allocated, including the 1654 * private data for the driver. You must call ieee80211_unregister_hw() 1655 * before calling this function. 1656 * 1657 * @hw: the hardware to free 1658 */ 1659void ieee80211_free_hw(struct ieee80211_hw *hw); 1660 1661/** 1662 * ieee80211_restart_hw - restart hardware completely 1663 * 1664 * Call this function when the hardware was restarted for some reason 1665 * (hardware error, ...) and the driver is unable to restore its state 1666 * by itself. mac80211 assumes that at this point the driver/hardware 1667 * is completely uninitialised and stopped, it starts the process by 1668 * calling the ->start() operation. The driver will need to reset all 1669 * internal state that it has prior to calling this function. 1670 * 1671 * @hw: the hardware to restart 1672 */ 1673void ieee80211_restart_hw(struct ieee80211_hw *hw); 1674 1675/* 1676 * trick to avoid symbol clashes with the ieee80211 subsystem, 1677 * use the inline below instead 1678 */ 1679void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 1680 1681/** 1682 * ieee80211_rx - receive frame 1683 * 1684 * Use this function to hand received frames to mac80211. The receive 1685 * buffer in @skb must start with an IEEE 802.11 header or a radiotap 1686 * header if %RX_FLAG_RADIOTAP is set in the @status flags. 1687 * 1688 * This function may not be called in IRQ context. Calls to this function 1689 * for a single hardware must be synchronized against each other. Calls 1690 * to this function and ieee80211_rx_irqsafe() may not be mixed for a 1691 * single hardware. 1692 * 1693 * @hw: the hardware this frame came in on 1694 * @skb: the buffer to receive, owned by mac80211 after this call 1695 */ 1696static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) 1697{ 1698 __ieee80211_rx(hw, skb); 1699} 1700 1701/** 1702 * ieee80211_rx_irqsafe - receive frame 1703 * 1704 * Like ieee80211_rx() but can be called in IRQ context 1705 * (internally defers to a tasklet.) 1706 * 1707 * Calls to this function and ieee80211_rx() may not be mixed for a 1708 * single hardware. 1709 * 1710 * @hw: the hardware this frame came in on 1711 * @skb: the buffer to receive, owned by mac80211 after this call 1712 */ 1713void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 1714 1715/** 1716 * ieee80211_tx_status - transmit status callback 1717 * 1718 * Call this function for all transmitted frames after they have been 1719 * transmitted. It is permissible to not call this function for 1720 * multicast frames but this can affect statistics. 1721 * 1722 * This function may not be called in IRQ context. Calls to this function 1723 * for a single hardware must be synchronized against each other. Calls 1724 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1725 * for a single hardware. 1726 * 1727 * @hw: the hardware the frame was transmitted by 1728 * @skb: the frame that was transmitted, owned by mac80211 after this call 1729 */ 1730void ieee80211_tx_status(struct ieee80211_hw *hw, 1731 struct sk_buff *skb); 1732 1733/** 1734 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 1735 * 1736 * Like ieee80211_tx_status() but can be called in IRQ context 1737 * (internally defers to a tasklet.) 1738 * 1739 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1740 * single hardware. 1741 * 1742 * @hw: the hardware the frame was transmitted by 1743 * @skb: the frame that was transmitted, owned by mac80211 after this call 1744 */ 1745void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1746 struct sk_buff *skb); 1747 1748/** 1749 * ieee80211_beacon_get - beacon generation function 1750 * @hw: pointer obtained from ieee80211_alloc_hw(). 1751 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1752 * 1753 * If the beacon frames are generated by the host system (i.e., not in 1754 * hardware/firmware), the low-level driver uses this function to receive 1755 * the next beacon frame from the 802.11 code. The low-level is responsible 1756 * for calling this function before beacon data is needed (e.g., based on 1757 * hardware interrupt). Returned skb is used only once and low-level driver 1758 * is responsible for freeing it. 1759 */ 1760struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 1761 struct ieee80211_vif *vif); 1762 1763/** 1764 * ieee80211_rts_get - RTS frame generation function 1765 * @hw: pointer obtained from ieee80211_alloc_hw(). 1766 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1767 * @frame: pointer to the frame that is going to be protected by the RTS. 1768 * @frame_len: the frame length (in octets). 1769 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1770 * @rts: The buffer where to store the RTS frame. 1771 * 1772 * If the RTS frames are generated by the host system (i.e., not in 1773 * hardware/firmware), the low-level driver uses this function to receive 1774 * the next RTS frame from the 802.11 code. The low-level is responsible 1775 * for calling this function before and RTS frame is needed. 1776 */ 1777void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1778 const void *frame, size_t frame_len, 1779 const struct ieee80211_tx_info *frame_txctl, 1780 struct ieee80211_rts *rts); 1781 1782/** 1783 * ieee80211_rts_duration - Get the duration field for an RTS frame 1784 * @hw: pointer obtained from ieee80211_alloc_hw(). 1785 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1786 * @frame_len: the length of the frame that is going to be protected by the RTS. 1787 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1788 * 1789 * If the RTS is generated in firmware, but the host system must provide 1790 * the duration field, the low-level driver uses this function to receive 1791 * the duration field value in little-endian byteorder. 1792 */ 1793__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 1794 struct ieee80211_vif *vif, size_t frame_len, 1795 const struct ieee80211_tx_info *frame_txctl); 1796 1797/** 1798 * ieee80211_ctstoself_get - CTS-to-self frame generation function 1799 * @hw: pointer obtained from ieee80211_alloc_hw(). 1800 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1801 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 1802 * @frame_len: the frame length (in octets). 1803 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1804 * @cts: The buffer where to store the CTS-to-self frame. 1805 * 1806 * If the CTS-to-self frames are generated by the host system (i.e., not in 1807 * hardware/firmware), the low-level driver uses this function to receive 1808 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 1809 * for calling this function before and CTS-to-self frame is needed. 1810 */ 1811void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 1812 struct ieee80211_vif *vif, 1813 const void *frame, size_t frame_len, 1814 const struct ieee80211_tx_info *frame_txctl, 1815 struct ieee80211_cts *cts); 1816 1817/** 1818 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 1819 * @hw: pointer obtained from ieee80211_alloc_hw(). 1820 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1821 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 1822 * @frame_txctl: &struct ieee80211_tx_info of the frame. 1823 * 1824 * If the CTS-to-self is generated in firmware, but the host system must provide 1825 * the duration field, the low-level driver uses this function to receive 1826 * the duration field value in little-endian byteorder. 1827 */ 1828__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 1829 struct ieee80211_vif *vif, 1830 size_t frame_len, 1831 const struct ieee80211_tx_info *frame_txctl); 1832 1833/** 1834 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 1835 * @hw: pointer obtained from ieee80211_alloc_hw(). 1836 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1837 * @frame_len: the length of the frame. 1838 * @rate: the rate at which the frame is going to be transmitted. 1839 * 1840 * Calculate the duration field of some generic frame, given its 1841 * length and transmission rate (in 100kbps). 1842 */ 1843__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 1844 struct ieee80211_vif *vif, 1845 size_t frame_len, 1846 struct ieee80211_rate *rate); 1847 1848/** 1849 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 1850 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1851 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 1852 * 1853 * Function for accessing buffered broadcast and multicast frames. If 1854 * hardware/firmware does not implement buffering of broadcast/multicast 1855 * frames when power saving is used, 802.11 code buffers them in the host 1856 * memory. The low-level driver uses this function to fetch next buffered 1857 * frame. In most cases, this is used when generating beacon frame. This 1858 * function returns a pointer to the next buffered skb or NULL if no more 1859 * buffered frames are available. 1860 * 1861 * Note: buffered frames are returned only after DTIM beacon frame was 1862 * generated with ieee80211_beacon_get() and the low-level driver must thus 1863 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 1864 * NULL if the previous generated beacon was not DTIM, so the low-level driver 1865 * does not need to check for DTIM beacons separately and should be able to 1866 * use common code for all beacons. 1867 */ 1868struct sk_buff * 1869ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 1870 1871/** 1872 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 1873 * 1874 * This function computes a TKIP rc4 key for an skb. It computes 1875 * a phase 1 key if needed (iv16 wraps around). This function is to 1876 * be used by drivers which can do HW encryption but need to compute 1877 * to phase 1/2 key in SW. 1878 * 1879 * @keyconf: the parameter passed with the set key 1880 * @skb: the skb for which the key is needed 1881 * @type: TBD 1882 * @key: a buffer to which the key will be written 1883 */ 1884void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 1885 struct sk_buff *skb, 1886 enum ieee80211_tkip_key_type type, u8 *key); 1887/** 1888 * ieee80211_wake_queue - wake specific queue 1889 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1890 * @queue: queue number (counted from zero). 1891 * 1892 * Drivers should use this function instead of netif_wake_queue. 1893 */ 1894void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 1895 1896/** 1897 * ieee80211_stop_queue - stop specific queue 1898 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1899 * @queue: queue number (counted from zero). 1900 * 1901 * Drivers should use this function instead of netif_stop_queue. 1902 */ 1903void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 1904 1905/** 1906 * ieee80211_queue_stopped - test status of the queue 1907 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1908 * @queue: queue number (counted from zero). 1909 * 1910 * Drivers should use this function instead of netif_stop_queue. 1911 */ 1912 1913int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 1914 1915/** 1916 * ieee80211_stop_queues - stop all queues 1917 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1918 * 1919 * Drivers should use this function instead of netif_stop_queue. 1920 */ 1921void ieee80211_stop_queues(struct ieee80211_hw *hw); 1922 1923/** 1924 * ieee80211_wake_queues - wake all queues 1925 * @hw: pointer as obtained from ieee80211_alloc_hw(). 1926 * 1927 * Drivers should use this function instead of netif_wake_queue. 1928 */ 1929void ieee80211_wake_queues(struct ieee80211_hw *hw); 1930 1931/** 1932 * ieee80211_scan_completed - completed hardware scan 1933 * 1934 * When hardware scan offload is used (i.e. the hw_scan() callback is 1935 * assigned) this function needs to be called by the driver to notify 1936 * mac80211 that the scan finished. 1937 * 1938 * @hw: the hardware that finished the scan 1939 * @aborted: set to true if scan was aborted 1940 */ 1941void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 1942 1943/** 1944 * ieee80211_iterate_active_interfaces - iterate active interfaces 1945 * 1946 * This function iterates over the interfaces associated with a given 1947 * hardware that are currently active and calls the callback for them. 1948 * This function allows the iterator function to sleep, when the iterator 1949 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 1950 * be used. 1951 * 1952 * @hw: the hardware struct of which the interfaces should be iterated over 1953 * @iterator: the iterator function to call 1954 * @data: first argument of the iterator function 1955 */ 1956void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 1957 void (*iterator)(void *data, u8 *mac, 1958 struct ieee80211_vif *vif), 1959 void *data); 1960 1961/** 1962 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 1963 * 1964 * This function iterates over the interfaces associated with a given 1965 * hardware that are currently active and calls the callback for them. 1966 * This function requires the iterator callback function to be atomic, 1967 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 1968 * 1969 * @hw: the hardware struct of which the interfaces should be iterated over 1970 * @iterator: the iterator function to call, cannot sleep 1971 * @data: first argument of the iterator function 1972 */ 1973void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 1974 void (*iterator)(void *data, 1975 u8 *mac, 1976 struct ieee80211_vif *vif), 1977 void *data); 1978 1979/** 1980 * ieee80211_queue_work - add work onto the mac80211 workqueue 1981 * 1982 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 1983 * This helper ensures drivers are not queueing work when they should not be. 1984 * 1985 * @hw: the hardware struct for the interface we are adding work for 1986 * @work: the work we want to add onto the mac80211 workqueue 1987 */ 1988void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 1989 1990/** 1991 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 1992 * 1993 * Drivers and mac80211 use this to queue delayed work onto the mac80211 1994 * workqueue. 1995 * 1996 * @hw: the hardware struct for the interface we are adding work for 1997 * @dwork: delayable work to queue onto the mac80211 workqueue 1998 * @delay: number of jiffies to wait before queueing 1999 */ 2000void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 2001 struct delayed_work *dwork, 2002 unsigned long delay); 2003 2004/** 2005 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 2006 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2007 * @ra: receiver address of the BA session recipient 2008 * @tid: the TID to BA on. 2009 * 2010 * Return: success if addBA request was sent, failure otherwise 2011 * 2012 * Although mac80211/low level driver/user space application can estimate 2013 * the need to start aggregation on a certain RA/TID, the session level 2014 * will be managed by the mac80211. 2015 */ 2016int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); 2017 2018/** 2019 * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. 2020 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2021 * @ra: receiver address of the BA session recipient. 2022 * @tid: the TID to BA on. 2023 * 2024 * This function must be called by low level driver once it has 2025 * finished with preparations for the BA session. 2026 */ 2027void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); 2028 2029/** 2030 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 2031 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2032 * @ra: receiver address of the BA session recipient. 2033 * @tid: the TID to BA on. 2034 * 2035 * This function must be called by low level driver once it has 2036 * finished with preparations for the BA session. 2037 * This version of the function is IRQ-safe. 2038 */ 2039void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 2040 u16 tid); 2041 2042/** 2043 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 2044 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2045 * @ra: receiver address of the BA session recipient 2046 * @tid: the TID to stop BA. 2047 * @initiator: if indicates initiator DELBA frame will be sent. 2048 * 2049 * Return: error if no sta with matching da found, success otherwise 2050 * 2051 * Although mac80211/low level driver/user space application can estimate 2052 * the need to stop aggregation on a certain RA/TID, the session level 2053 * will be managed by the mac80211. 2054 */ 2055int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, 2056 u8 *ra, u16 tid, 2057 enum ieee80211_back_parties initiator); 2058 2059/** 2060 * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. 2061 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2062 * @ra: receiver address of the BA session recipient. 2063 * @tid: the desired TID to BA on. 2064 * 2065 * This function must be called by low level driver once it has 2066 * finished with preparations for the BA session tear down. 2067 */ 2068void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); 2069 2070/** 2071 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 2072 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2073 * @ra: receiver address of the BA session recipient. 2074 * @tid: the desired TID to BA on. 2075 * 2076 * This function must be called by low level driver once it has 2077 * finished with preparations for the BA session tear down. 2078 * This version of the function is IRQ-safe. 2079 */ 2080void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, 2081 u16 tid); 2082 2083/** 2084 * ieee80211_find_sta - find a station 2085 * 2086 * @hw: pointer as obtained from ieee80211_alloc_hw() 2087 * @addr: station's address 2088 * 2089 * This function must be called under RCU lock and the 2090 * resulting pointer is only valid under RCU lock as well. 2091 */ 2092struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw, 2093 const u8 *addr); 2094 2095/** 2096 * ieee80211_beacon_loss - inform hardware does not receive beacons 2097 * 2098 * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. 2099 * 2100 * When beacon filtering is enabled with IEEE80211_HW_BEACON_FILTERING and 2101 * IEEE80211_CONF_PS is set, the driver needs to inform whenever the 2102 * hardware is not receiving beacons with this function. 2103 */ 2104void ieee80211_beacon_loss(struct ieee80211_vif *vif); 2105 2106/* Rate control API */ 2107 2108/** 2109 * enum rate_control_changed - flags to indicate which parameter changed 2110 * 2111 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 2112 * changed, rate control algorithm can update its internal state if needed. 2113 */ 2114enum rate_control_changed { 2115 IEEE80211_RC_HT_CHANGED = BIT(0) 2116}; 2117 2118/** 2119 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 2120 * 2121 * @hw: The hardware the algorithm is invoked for. 2122 * @sband: The band this frame is being transmitted on. 2123 * @bss_conf: the current BSS configuration 2124 * @reported_rate: The rate control algorithm can fill this in to indicate 2125 * which rate should be reported to userspace as the current rate and 2126 * used for rate calculations in the mesh network. 2127 * @rts: whether RTS will be used for this frame because it is longer than the 2128 * RTS threshold 2129 * @short_preamble: whether mac80211 will request short-preamble transmission 2130 * if the selected rate supports it 2131 * @max_rate_idx: user-requested maximum rate (not MCS for now) 2132 * @skb: the skb that will be transmitted, the control information in it needs 2133 * to be filled in 2134 */ 2135struct ieee80211_tx_rate_control { 2136 struct ieee80211_hw *hw; 2137 struct ieee80211_supported_band *sband; 2138 struct ieee80211_bss_conf *bss_conf; 2139 struct sk_buff *skb; 2140 struct ieee80211_tx_rate reported_rate; 2141 bool rts, short_preamble; 2142 u8 max_rate_idx; 2143}; 2144 2145struct rate_control_ops { 2146 struct module *module; 2147 const char *name; 2148 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 2149 void (*free)(void *priv); 2150 2151 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 2152 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 2153 struct ieee80211_sta *sta, void *priv_sta); 2154 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 2155 struct ieee80211_sta *sta, 2156 void *priv_sta, u32 changed); 2157 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 2158 void *priv_sta); 2159 2160 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 2161 struct ieee80211_sta *sta, void *priv_sta, 2162 struct sk_buff *skb); 2163 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 2164 struct ieee80211_tx_rate_control *txrc); 2165 2166 void (*add_sta_debugfs)(void *priv, void *priv_sta, 2167 struct dentry *dir); 2168 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 2169}; 2170 2171static inline int rate_supported(struct ieee80211_sta *sta, 2172 enum ieee80211_band band, 2173 int index) 2174{ 2175 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 2176} 2177 2178/** 2179 * rate_control_send_low - helper for drivers for management/no-ack frames 2180 * 2181 * Rate control algorithms that agree to use the lowest rate to 2182 * send management frames and NO_ACK data with the respective hw 2183 * retries should use this in the beginning of their mac80211 get_rate 2184 * callback. If true is returned the rate control can simply return. 2185 * If false is returned we guarantee that sta and sta and priv_sta is 2186 * not null. 2187 * 2188 * Rate control algorithms wishing to do more intelligent selection of 2189 * rate for multicast/broadcast frames may choose to not use this. 2190 * 2191 * @sta: &struct ieee80211_sta pointer to the target destination. Note 2192 * that this may be null. 2193 * @priv_sta: private rate control structure. This may be null. 2194 * @txrc: rate control information we sholud populate for mac80211. 2195 */ 2196bool rate_control_send_low(struct ieee80211_sta *sta, 2197 void *priv_sta, 2198 struct ieee80211_tx_rate_control *txrc); 2199 2200 2201static inline s8 2202rate_lowest_index(struct ieee80211_supported_band *sband, 2203 struct ieee80211_sta *sta) 2204{ 2205 int i; 2206 2207 for (i = 0; i < sband->n_bitrates; i++) 2208 if (rate_supported(sta, sband->band, i)) 2209 return i; 2210 2211 /* warn when we cannot find a rate. */ 2212 WARN_ON(1); 2213 2214 return 0; 2215} 2216 2217static inline 2218bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 2219 struct ieee80211_sta *sta) 2220{ 2221 unsigned int i; 2222 2223 for (i = 0; i < sband->n_bitrates; i++) 2224 if (rate_supported(sta, sband->band, i)) 2225 return true; 2226 return false; 2227} 2228 2229int ieee80211_rate_control_register(struct rate_control_ops *ops); 2230void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 2231 2232static inline bool 2233conf_is_ht20(struct ieee80211_conf *conf) 2234{ 2235 return conf->channel_type == NL80211_CHAN_HT20; 2236} 2237 2238static inline bool 2239conf_is_ht40_minus(struct ieee80211_conf *conf) 2240{ 2241 return conf->channel_type == NL80211_CHAN_HT40MINUS; 2242} 2243 2244static inline bool 2245conf_is_ht40_plus(struct ieee80211_conf *conf) 2246{ 2247 return conf->channel_type == NL80211_CHAN_HT40PLUS; 2248} 2249 2250static inline bool 2251conf_is_ht40(struct ieee80211_conf *conf) 2252{ 2253 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 2254} 2255 2256static inline bool 2257conf_is_ht(struct ieee80211_conf *conf) 2258{ 2259 return conf->channel_type != NL80211_CHAN_NO_HT; 2260} 2261 2262#endif /* MAC80211_H */ 2263