mac80211.h revision d1f5b7a34aa5ff703c4966ea2652d4212ac75940
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 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 * @uapsd: is U-APSD mode enabled for the queue 111 */ 112struct ieee80211_tx_queue_params { 113 u16 txop; 114 u16 cw_min; 115 u16 cw_max; 116 u8 aifs; 117 bool uapsd; 118}; 119 120struct ieee80211_low_level_stats { 121 unsigned int dot11ACKFailureCount; 122 unsigned int dot11RTSFailureCount; 123 unsigned int dot11FCSErrorCount; 124 unsigned int dot11RTSSuccessCount; 125}; 126 127/** 128 * enum ieee80211_bss_change - BSS change notification flags 129 * 130 * These flags are used with the bss_info_changed() callback 131 * to indicate which BSS parameter changed. 132 * 133 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 134 * also implies a change in the AID. 135 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 136 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 137 * @BSS_CHANGED_ERP_SLOT: slot timing changed 138 * @BSS_CHANGED_HT: 802.11n parameters changed 139 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 140 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 141 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 142 * reason (IBSS and managed mode) 143 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 144 * new beacon (beaconing modes) 145 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 146 * enabled/disabled (beaconing modes) 147 * @BSS_CHANGED_CQM: Connection quality monitor config changed 148 * @BSS_CHANGED_IBSS: IBSS join status changed 149 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 150 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 151 * that it is only ever disabled for station mode. 152 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 153 */ 154enum ieee80211_bss_change { 155 BSS_CHANGED_ASSOC = 1<<0, 156 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 157 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 158 BSS_CHANGED_ERP_SLOT = 1<<3, 159 BSS_CHANGED_HT = 1<<4, 160 BSS_CHANGED_BASIC_RATES = 1<<5, 161 BSS_CHANGED_BEACON_INT = 1<<6, 162 BSS_CHANGED_BSSID = 1<<7, 163 BSS_CHANGED_BEACON = 1<<8, 164 BSS_CHANGED_BEACON_ENABLED = 1<<9, 165 BSS_CHANGED_CQM = 1<<10, 166 BSS_CHANGED_IBSS = 1<<11, 167 BSS_CHANGED_ARP_FILTER = 1<<12, 168 BSS_CHANGED_QOS = 1<<13, 169 BSS_CHANGED_IDLE = 1<<14, 170 171 /* when adding here, make sure to change ieee80211_reconfig */ 172}; 173 174/* 175 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 176 * of addresses for an interface increase beyond this value, hardware ARP 177 * filtering will be disabled. 178 */ 179#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 180 181/** 182 * struct ieee80211_bss_conf - holds the BSS's changing parameters 183 * 184 * This structure keeps information about a BSS (and an association 185 * to that BSS) that can change during the lifetime of the BSS. 186 * 187 * @assoc: association status 188 * @ibss_joined: indicates whether this station is part of an IBSS 189 * or not 190 * @aid: association ID number, valid only when @assoc is true 191 * @use_cts_prot: use CTS protection 192 * @use_short_preamble: use 802.11b short preamble; 193 * if the hardware cannot handle this it must set the 194 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 195 * @use_short_slot: use short slot time (only relevant for ERP); 196 * if the hardware cannot handle this it must set the 197 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 198 * @dtim_period: num of beacons before the next DTIM, for beaconing, 199 * valid in station mode only while @assoc is true and if also 200 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 201 * @ps_dtim_period) 202 * @timestamp: beacon timestamp 203 * @beacon_int: beacon interval 204 * @assoc_capability: capabilities taken from assoc resp 205 * @basic_rates: bitmap of basic rates, each bit stands for an 206 * index into the rate table configured by the driver in 207 * the current band. 208 * @bssid: The BSSID for this BSS 209 * @enable_beacon: whether beaconing should be enabled or not 210 * @channel_type: Channel type for this BSS -- the hardware might be 211 * configured for HT40+ while this BSS only uses no-HT, for 212 * example. 213 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 214 * This field is only valid when the channel type is one of the HT types. 215 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 216 * implies disabled 217 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 218 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 219 * may filter ARP queries targeted for other addresses than listed here. 220 * The driver must allow ARP queries targeted for all address listed here 221 * to pass through. An empty list implies no ARP queries need to pass. 222 * @arp_addr_cnt: Number of addresses currently on the list. 223 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 224 * filter ARP queries based on the @arp_addr_list, if disabled, the 225 * hardware must not perform any ARP filtering. Note, that the filter will 226 * be enabled also in promiscuous mode. 227 * @qos: This is a QoS-enabled BSS. 228 * @idle: This interface is idle. There's also a global idle flag in the 229 * hardware config which may be more appropriate depending on what 230 * your driver/device needs to do. 231 */ 232struct ieee80211_bss_conf { 233 const u8 *bssid; 234 /* association related data */ 235 bool assoc, ibss_joined; 236 u16 aid; 237 /* erp related data */ 238 bool use_cts_prot; 239 bool use_short_preamble; 240 bool use_short_slot; 241 bool enable_beacon; 242 u8 dtim_period; 243 u16 beacon_int; 244 u16 assoc_capability; 245 u64 timestamp; 246 u32 basic_rates; 247 u16 ht_operation_mode; 248 s32 cqm_rssi_thold; 249 u32 cqm_rssi_hyst; 250 enum nl80211_channel_type channel_type; 251 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 252 u8 arp_addr_cnt; 253 bool arp_filter_enabled; 254 bool qos; 255 bool idle; 256}; 257 258/** 259 * enum mac80211_tx_control_flags - flags to describe transmission information/status 260 * 261 * These flags are used with the @flags member of &ieee80211_tx_info. 262 * 263 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 264 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 265 * number to this frame, taking care of not overwriting the fragment 266 * number and increasing the sequence number only when the 267 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 268 * assign sequence numbers to QoS-data frames but cannot do so correctly 269 * for non-QoS-data and management frames because beacons need them from 270 * that counter as well and mac80211 cannot guarantee proper sequencing. 271 * If this flag is set, the driver should instruct the hardware to 272 * assign a sequence number to the frame or assign one itself. Cf. IEEE 273 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 274 * beacons and always be clear for frames without a sequence number field. 275 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 276 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 277 * station 278 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 279 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 280 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 281 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 282 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 283 * because the destination STA was in powersave mode. Note that to 284 * avoid race conditions, the filter must be set by the hardware or 285 * firmware upon receiving a frame that indicates that the station 286 * went to sleep (must be done on device to filter frames already on 287 * the queue) and may only be unset after mac80211 gives the OK for 288 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 289 * since only then is it guaranteed that no more frames are in the 290 * hardware queue. 291 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 292 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 293 * is for the whole aggregation. 294 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 295 * so consider using block ack request (BAR). 296 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 297 * set by rate control algorithms to indicate probe rate, will 298 * be cleared for fragmented frames (except on the last fragment) 299 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 300 * used to indicate that a pending frame requires TX processing before 301 * it can be sent out. 302 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 303 * used to indicate that a frame was already retried due to PS 304 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 305 * used to indicate frame should not be encrypted 306 * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) 307 * This frame is a response to a PS-poll frame and should be sent 308 * although the station is in powersave mode. 309 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 310 * transmit function after the current frame, this can be used 311 * by drivers to kick the DMA queue only if unset or when the 312 * queue gets full. 313 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 314 * after TX status because the destination was asleep, it must not 315 * be modified again (no seqno assignment, crypto, etc.) 316 * @IEEE80211_TX_INTFL_HAS_RADIOTAP: This frame was injected and still 317 * has a radiotap header at skb->data. 318 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 319 * MLME command (internal to mac80211 to figure out whether to send TX 320 * status to user space) 321 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 322 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 323 * frame and selects the maximum number of streams that it can use. 324 */ 325enum mac80211_tx_control_flags { 326 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 327 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 328 IEEE80211_TX_CTL_NO_ACK = BIT(2), 329 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 330 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 331 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 332 IEEE80211_TX_CTL_AMPDU = BIT(6), 333 IEEE80211_TX_CTL_INJECTED = BIT(7), 334 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 335 IEEE80211_TX_STAT_ACK = BIT(9), 336 IEEE80211_TX_STAT_AMPDU = BIT(10), 337 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 338 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 339 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 340 IEEE80211_TX_INTFL_RETRIED = BIT(15), 341 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 342 IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), 343 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 344 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 345 IEEE80211_TX_INTFL_HAS_RADIOTAP = BIT(20), 346 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 347 IEEE80211_TX_CTL_LDPC = BIT(22), 348 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 349}; 350 351#define IEEE80211_TX_CTL_STBC_SHIFT 23 352 353/** 354 * enum mac80211_rate_control_flags - per-rate flags set by the 355 * Rate Control algorithm. 356 * 357 * These flags are set by the Rate control algorithm for each rate during tx, 358 * in the @flags member of struct ieee80211_tx_rate. 359 * 360 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 361 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 362 * This is set if the current BSS requires ERP protection. 363 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 364 * @IEEE80211_TX_RC_MCS: HT rate. 365 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 366 * Greenfield mode. 367 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 368 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 369 * adjacent 20 MHz channels, if the current channel type is 370 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 371 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 372 */ 373enum mac80211_rate_control_flags { 374 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 375 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 376 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 377 378 /* rate index is an MCS rate number instead of an index */ 379 IEEE80211_TX_RC_MCS = BIT(3), 380 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 381 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 382 IEEE80211_TX_RC_DUP_DATA = BIT(6), 383 IEEE80211_TX_RC_SHORT_GI = BIT(7), 384}; 385 386 387/* there are 40 bytes if you don't need the rateset to be kept */ 388#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 389 390/* if you do need the rateset, then you have less space */ 391#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 392 393/* maximum number of rate stages */ 394#define IEEE80211_TX_MAX_RATES 5 395 396/** 397 * struct ieee80211_tx_rate - rate selection/status 398 * 399 * @idx: rate index to attempt to send with 400 * @flags: rate control flags (&enum mac80211_rate_control_flags) 401 * @count: number of tries in this rate before going to the next rate 402 * 403 * A value of -1 for @idx indicates an invalid rate and, if used 404 * in an array of retry rates, that no more rates should be tried. 405 * 406 * When used for transmit status reporting, the driver should 407 * always report the rate along with the flags it used. 408 * 409 * &struct ieee80211_tx_info contains an array of these structs 410 * in the control information, and it will be filled by the rate 411 * control algorithm according to what should be sent. For example, 412 * if this array contains, in the format { <idx>, <count> } the 413 * information 414 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 415 * then this means that the frame should be transmitted 416 * up to twice at rate 3, up to twice at rate 2, and up to four 417 * times at rate 1 if it doesn't get acknowledged. Say it gets 418 * acknowledged by the peer after the fifth attempt, the status 419 * information should then contain 420 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 421 * since it was transmitted twice at rate 3, twice at rate 2 422 * and once at rate 1 after which we received an acknowledgement. 423 */ 424struct ieee80211_tx_rate { 425 s8 idx; 426 u8 count; 427 u8 flags; 428} __packed; 429 430/** 431 * struct ieee80211_tx_info - skb transmit information 432 * 433 * This structure is placed in skb->cb for three uses: 434 * (1) mac80211 TX control - mac80211 tells the driver what to do 435 * (2) driver internal use (if applicable) 436 * (3) TX status information - driver tells mac80211 what happened 437 * 438 * The TX control's sta pointer is only valid during the ->tx call, 439 * it may be NULL. 440 * 441 * @flags: transmit info flags, defined above 442 * @band: the band to transmit on (use for checking for races) 443 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 444 * @pad: padding, ignore 445 * @control: union for control data 446 * @status: union for status data 447 * @driver_data: array of driver_data pointers 448 * @ampdu_ack_len: number of acked aggregated frames. 449 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 450 * @ampdu_len: number of aggregated frames. 451 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 452 * @ack_signal: signal strength of the ACK frame 453 */ 454struct ieee80211_tx_info { 455 /* common information */ 456 u32 flags; 457 u8 band; 458 459 u8 antenna_sel_tx; 460 461 /* 2 byte hole */ 462 u8 pad[2]; 463 464 union { 465 struct { 466 union { 467 /* rate control */ 468 struct { 469 struct ieee80211_tx_rate rates[ 470 IEEE80211_TX_MAX_RATES]; 471 s8 rts_cts_rate_idx; 472 }; 473 /* only needed before rate control */ 474 unsigned long jiffies; 475 }; 476 /* NB: vif can be NULL for injected frames */ 477 struct ieee80211_vif *vif; 478 struct ieee80211_key_conf *hw_key; 479 struct ieee80211_sta *sta; 480 } control; 481 struct { 482 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 483 u8 ampdu_ack_len; 484 int ack_signal; 485 u8 ampdu_len; 486 /* 15 bytes free */ 487 } status; 488 struct { 489 struct ieee80211_tx_rate driver_rates[ 490 IEEE80211_TX_MAX_RATES]; 491 void *rate_driver_data[ 492 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 493 }; 494 void *driver_data[ 495 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 496 }; 497}; 498 499static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 500{ 501 return (struct ieee80211_tx_info *)skb->cb; 502} 503 504static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 505{ 506 return (struct ieee80211_rx_status *)skb->cb; 507} 508 509/** 510 * ieee80211_tx_info_clear_status - clear TX status 511 * 512 * @info: The &struct ieee80211_tx_info to be cleared. 513 * 514 * When the driver passes an skb back to mac80211, it must report 515 * a number of things in TX status. This function clears everything 516 * in the TX status but the rate control information (it does clear 517 * the count since you need to fill that in anyway). 518 * 519 * NOTE: You can only use this function if you do NOT use 520 * info->driver_data! Use info->rate_driver_data 521 * instead if you need only the less space that allows. 522 */ 523static inline void 524ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 525{ 526 int i; 527 528 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 529 offsetof(struct ieee80211_tx_info, control.rates)); 530 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 531 offsetof(struct ieee80211_tx_info, driver_rates)); 532 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 533 /* clear the rate counts */ 534 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 535 info->status.rates[i].count = 0; 536 537 BUILD_BUG_ON( 538 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 539 memset(&info->status.ampdu_ack_len, 0, 540 sizeof(struct ieee80211_tx_info) - 541 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 542} 543 544 545/** 546 * enum mac80211_rx_flags - receive flags 547 * 548 * These flags are used with the @flag member of &struct ieee80211_rx_status. 549 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 550 * Use together with %RX_FLAG_MMIC_STRIPPED. 551 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 552 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 553 * verification has been done by the hardware. 554 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 555 * If this flag is set, the stack cannot do any replay detection 556 * hence the driver or hardware will have to do that. 557 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 558 * the frame. 559 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 560 * the frame. 561 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 562 * is valid. This is useful in monitor mode and necessary for beacon frames 563 * to enable IBSS merging. 564 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 565 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 566 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 567 * @RX_FLAG_SHORT_GI: Short guard interval was used 568 * @RX_FLAG_INTERNAL_CMTR: set internally after frame was reported 569 * on cooked monitor to avoid double-reporting it for multiple 570 * virtual interfaces 571 */ 572enum mac80211_rx_flags { 573 RX_FLAG_MMIC_ERROR = 1<<0, 574 RX_FLAG_DECRYPTED = 1<<1, 575 RX_FLAG_MMIC_STRIPPED = 1<<3, 576 RX_FLAG_IV_STRIPPED = 1<<4, 577 RX_FLAG_FAILED_FCS_CRC = 1<<5, 578 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 579 RX_FLAG_TSFT = 1<<7, 580 RX_FLAG_SHORTPRE = 1<<8, 581 RX_FLAG_HT = 1<<9, 582 RX_FLAG_40MHZ = 1<<10, 583 RX_FLAG_SHORT_GI = 1<<11, 584 RX_FLAG_INTERNAL_CMTR = 1<<12, 585}; 586 587/** 588 * struct ieee80211_rx_status - receive status 589 * 590 * The low-level driver should provide this information (the subset 591 * supported by hardware) to the 802.11 code with each received 592 * frame, in the skb's control buffer (cb). 593 * 594 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 595 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 596 * @band: the active band when this frame was received 597 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 598 * @signal: signal strength when receiving this frame, either in dBm, in dB or 599 * unspecified depending on the hardware capabilities flags 600 * @IEEE80211_HW_SIGNAL_* 601 * @antenna: antenna used 602 * @rate_idx: index of data rate into band's supported rates or MCS index if 603 * HT rates are use (RX_FLAG_HT) 604 * @flag: %RX_FLAG_* 605 */ 606struct ieee80211_rx_status { 607 u64 mactime; 608 enum ieee80211_band band; 609 int freq; 610 int signal; 611 int antenna; 612 int rate_idx; 613 int flag; 614}; 615 616/** 617 * enum ieee80211_conf_flags - configuration flags 618 * 619 * Flags to define PHY configuration options 620 * 621 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 622 * to determine for example whether to calculate timestamps for packets 623 * or not, do not use instead of filter flags! 624 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 625 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 626 * meaning that the hardware still wakes up for beacons, is able to 627 * transmit frames and receive the possible acknowledgment frames. 628 * Not to be confused with hardware specific wakeup/sleep states, 629 * driver is responsible for that. See the section "Powersave support" 630 * for more. 631 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 632 * the driver should be prepared to handle configuration requests but 633 * may turn the device off as much as possible. Typically, this flag will 634 * be set when an interface is set UP but not associated or scanning, but 635 * it can also be unset in that case when monitor interfaces are active. 636 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 637 * operating channel. 638 */ 639enum ieee80211_conf_flags { 640 IEEE80211_CONF_MONITOR = (1<<0), 641 IEEE80211_CONF_PS = (1<<1), 642 IEEE80211_CONF_IDLE = (1<<2), 643 IEEE80211_CONF_OFFCHANNEL = (1<<3), 644}; 645 646 647/** 648 * enum ieee80211_conf_changed - denotes which configuration changed 649 * 650 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 651 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 652 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 653 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 654 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 655 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 656 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 657 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 658 */ 659enum ieee80211_conf_changed { 660 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 661 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 662 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 663 IEEE80211_CONF_CHANGE_PS = BIT(4), 664 IEEE80211_CONF_CHANGE_POWER = BIT(5), 665 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 666 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 667 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 668}; 669 670/** 671 * enum ieee80211_smps_mode - spatial multiplexing power save mode 672 * 673 * @IEEE80211_SMPS_AUTOMATIC: automatic 674 * @IEEE80211_SMPS_OFF: off 675 * @IEEE80211_SMPS_STATIC: static 676 * @IEEE80211_SMPS_DYNAMIC: dynamic 677 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 678 */ 679enum ieee80211_smps_mode { 680 IEEE80211_SMPS_AUTOMATIC, 681 IEEE80211_SMPS_OFF, 682 IEEE80211_SMPS_STATIC, 683 IEEE80211_SMPS_DYNAMIC, 684 685 /* keep last */ 686 IEEE80211_SMPS_NUM_MODES, 687}; 688 689/** 690 * struct ieee80211_conf - configuration of the device 691 * 692 * This struct indicates how the driver shall configure the hardware. 693 * 694 * @flags: configuration flags defined above 695 * 696 * @listen_interval: listen interval in units of beacon interval 697 * @max_sleep_period: the maximum number of beacon intervals to sleep for 698 * before checking the beacon for a TIM bit (managed mode only); this 699 * value will be only achievable between DTIM frames, the hardware 700 * needs to check for the multicast traffic bit in DTIM beacons. 701 * This variable is valid only when the CONF_PS flag is set. 702 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 703 * in power saving. Power saving will not be enabled until a beacon 704 * has been received and the DTIM period is known. 705 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 706 * powersave documentation below. This variable is valid only when 707 * the CONF_PS flag is set. 708 * 709 * @power_level: requested transmit power (in dBm) 710 * 711 * @channel: the channel to tune to 712 * @channel_type: the channel (HT) type 713 * 714 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 715 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 716 * but actually means the number of transmissions not the number of retries 717 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 718 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 719 * number of transmissions not the number of retries 720 * 721 * @smps_mode: spatial multiplexing powersave mode; note that 722 * %IEEE80211_SMPS_STATIC is used when the device is not 723 * configured for an HT channel 724 */ 725struct ieee80211_conf { 726 u32 flags; 727 int power_level, dynamic_ps_timeout; 728 int max_sleep_period; 729 730 u16 listen_interval; 731 u8 ps_dtim_period; 732 733 u8 long_frame_max_tx_count, short_frame_max_tx_count; 734 735 struct ieee80211_channel *channel; 736 enum nl80211_channel_type channel_type; 737 enum ieee80211_smps_mode smps_mode; 738}; 739 740/** 741 * struct ieee80211_channel_switch - holds the channel switch data 742 * 743 * The information provided in this structure is required for channel switch 744 * operation. 745 * 746 * @timestamp: value in microseconds of the 64-bit Time Synchronization 747 * Function (TSF) timer when the frame containing the channel switch 748 * announcement was received. This is simply the rx.mactime parameter 749 * the driver passed into mac80211. 750 * @block_tx: Indicates whether transmission must be blocked before the 751 * scheduled channel switch, as indicated by the AP. 752 * @channel: the new channel to switch to 753 * @count: the number of TBTT's until the channel switch event 754 */ 755struct ieee80211_channel_switch { 756 u64 timestamp; 757 bool block_tx; 758 struct ieee80211_channel *channel; 759 u8 count; 760}; 761 762/** 763 * struct ieee80211_vif - per-interface data 764 * 765 * Data in this structure is continually present for driver 766 * use during the life of a virtual interface. 767 * 768 * @type: type of this virtual interface 769 * @bss_conf: BSS configuration for this interface, either our own 770 * or the BSS we're associated to 771 * @addr: address of this interface 772 * @drv_priv: data area for driver use, will always be aligned to 773 * sizeof(void *). 774 */ 775struct ieee80211_vif { 776 enum nl80211_iftype type; 777 struct ieee80211_bss_conf bss_conf; 778 u8 addr[ETH_ALEN]; 779 /* must be last */ 780 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 781}; 782 783static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 784{ 785#ifdef CONFIG_MAC80211_MESH 786 return vif->type == NL80211_IFTYPE_MESH_POINT; 787#endif 788 return false; 789} 790 791/** 792 * enum ieee80211_key_alg - key algorithm 793 * @ALG_WEP: WEP40 or WEP104 794 * @ALG_TKIP: TKIP 795 * @ALG_CCMP: CCMP (AES) 796 * @ALG_AES_CMAC: AES-128-CMAC 797 */ 798enum ieee80211_key_alg { 799 ALG_WEP, 800 ALG_TKIP, 801 ALG_CCMP, 802 ALG_AES_CMAC, 803}; 804 805/** 806 * enum ieee80211_key_flags - key flags 807 * 808 * These flags are used for communication about keys between the driver 809 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 810 * 811 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 812 * that the STA this key will be used with could be using QoS. 813 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 814 * driver to indicate that it requires IV generation for this 815 * particular key. 816 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 817 * the driver for a TKIP key if it requires Michael MIC 818 * generation in software. 819 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 820 * that the key is pairwise rather then a shared key. 821 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 822 * CCMP key if it requires CCMP encryption of management frames (MFP) to 823 * be done in software. 824 */ 825enum ieee80211_key_flags { 826 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 827 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 828 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 829 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 830 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 831}; 832 833/** 834 * struct ieee80211_key_conf - key information 835 * 836 * This key information is given by mac80211 to the driver by 837 * the set_key() callback in &struct ieee80211_ops. 838 * 839 * @hw_key_idx: To be set by the driver, this is the key index the driver 840 * wants to be given when a frame is transmitted and needs to be 841 * encrypted in hardware. 842 * @alg: The key algorithm. 843 * @flags: key flags, see &enum ieee80211_key_flags. 844 * @keyidx: the key index (0-3) 845 * @keylen: key material length 846 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 847 * data block: 848 * - Temporal Encryption Key (128 bits) 849 * - Temporal Authenticator Tx MIC Key (64 bits) 850 * - Temporal Authenticator Rx MIC Key (64 bits) 851 * @icv_len: The ICV length for this key type 852 * @iv_len: The IV length for this key type 853 */ 854struct ieee80211_key_conf { 855 enum ieee80211_key_alg alg; 856 u8 icv_len; 857 u8 iv_len; 858 u8 hw_key_idx; 859 u8 flags; 860 s8 keyidx; 861 u8 keylen; 862 u8 key[0]; 863}; 864 865/** 866 * enum set_key_cmd - key command 867 * 868 * Used with the set_key() callback in &struct ieee80211_ops, this 869 * indicates whether a key is being removed or added. 870 * 871 * @SET_KEY: a key is set 872 * @DISABLE_KEY: a key must be disabled 873 */ 874enum set_key_cmd { 875 SET_KEY, DISABLE_KEY, 876}; 877 878/** 879 * struct ieee80211_sta - station table entry 880 * 881 * A station table entry represents a station we are possibly 882 * communicating with. Since stations are RCU-managed in 883 * mac80211, any ieee80211_sta pointer you get access to must 884 * either be protected by rcu_read_lock() explicitly or implicitly, 885 * or you must take good care to not use such a pointer after a 886 * call to your sta_remove callback that removed it. 887 * 888 * @addr: MAC address 889 * @aid: AID we assigned to the station if we're an AP 890 * @supp_rates: Bitmap of supported rates (per band) 891 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 892 * @drv_priv: data area for driver use, will always be aligned to 893 * sizeof(void *), size is determined in hw information. 894 */ 895struct ieee80211_sta { 896 u32 supp_rates[IEEE80211_NUM_BANDS]; 897 u8 addr[ETH_ALEN]; 898 u16 aid; 899 struct ieee80211_sta_ht_cap ht_cap; 900 901 /* must be last */ 902 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 903}; 904 905/** 906 * enum sta_notify_cmd - sta notify command 907 * 908 * Used with the sta_notify() callback in &struct ieee80211_ops, this 909 * indicates if an associated station made a power state transition. 910 * 911 * @STA_NOTIFY_SLEEP: a station is now sleeping 912 * @STA_NOTIFY_AWAKE: a sleeping station woke up 913 */ 914enum sta_notify_cmd { 915 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 916}; 917 918/** 919 * enum ieee80211_tkip_key_type - get tkip key 920 * 921 * Used by drivers which need to get a tkip key for skb. Some drivers need a 922 * phase 1 key, others need a phase 2 key. A single function allows the driver 923 * to get the key, this enum indicates what type of key is required. 924 * 925 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 926 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 927 */ 928enum ieee80211_tkip_key_type { 929 IEEE80211_TKIP_P1_KEY, 930 IEEE80211_TKIP_P2_KEY, 931}; 932 933/** 934 * enum ieee80211_hw_flags - hardware flags 935 * 936 * These flags are used to indicate hardware capabilities to 937 * the stack. Generally, flags here should have their meaning 938 * done in a way that the simplest hardware doesn't need setting 939 * any particular flags. There are some exceptions to this rule, 940 * however, so you are advised to review these flags carefully. 941 * 942 * @IEEE80211_HW_HAS_RATE_CONTROL: 943 * The hardware or firmware includes rate control, and cannot be 944 * controlled by the stack. As such, no rate control algorithm 945 * should be instantiated, and the TX rate reported to userspace 946 * will be taken from the TX status instead of the rate control 947 * algorithm. 948 * Note that this requires that the driver implement a number of 949 * callbacks so it has the correct information, it needs to have 950 * the @set_rts_threshold callback and must look at the BSS config 951 * @use_cts_prot for G/N protection, @use_short_slot for slot 952 * timing in 2.4 GHz and @use_short_preamble for preambles for 953 * CCK frames. 954 * 955 * @IEEE80211_HW_RX_INCLUDES_FCS: 956 * Indicates that received frames passed to the stack include 957 * the FCS at the end. 958 * 959 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 960 * Some wireless LAN chipsets buffer broadcast/multicast frames 961 * for power saving stations in the hardware/firmware and others 962 * rely on the host system for such buffering. This option is used 963 * to configure the IEEE 802.11 upper layer to buffer broadcast and 964 * multicast frames when there are power saving stations so that 965 * the driver can fetch them with ieee80211_get_buffered_bc(). 966 * 967 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 968 * Hardware is not capable of short slot operation on the 2.4 GHz band. 969 * 970 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 971 * Hardware is not capable of receiving frames with short preamble on 972 * the 2.4 GHz band. 973 * 974 * @IEEE80211_HW_SIGNAL_UNSPEC: 975 * Hardware can provide signal values but we don't know its units. We 976 * expect values between 0 and @max_signal. 977 * If possible please provide dB or dBm instead. 978 * 979 * @IEEE80211_HW_SIGNAL_DBM: 980 * Hardware gives signal values in dBm, decibel difference from 981 * one milliwatt. This is the preferred method since it is standardized 982 * between different devices. @max_signal does not need to be set. 983 * 984 * @IEEE80211_HW_SPECTRUM_MGMT: 985 * Hardware supports spectrum management defined in 802.11h 986 * Measurement, Channel Switch, Quieting, TPC 987 * 988 * @IEEE80211_HW_AMPDU_AGGREGATION: 989 * Hardware supports 11n A-MPDU aggregation. 990 * 991 * @IEEE80211_HW_SUPPORTS_PS: 992 * Hardware has power save support (i.e. can go to sleep). 993 * 994 * @IEEE80211_HW_PS_NULLFUNC_STACK: 995 * Hardware requires nullfunc frame handling in stack, implies 996 * stack support for dynamic PS. 997 * 998 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 999 * Hardware has support for dynamic PS. 1000 * 1001 * @IEEE80211_HW_MFP_CAPABLE: 1002 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1003 * 1004 * @IEEE80211_HW_BEACON_FILTER: 1005 * Hardware supports dropping of irrelevant beacon frames to 1006 * avoid waking up cpu. 1007 * 1008 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1009 * Hardware supports static spatial multiplexing powersave, 1010 * ie. can turn off all but one chain even on HT connections 1011 * that should be using more chains. 1012 * 1013 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1014 * Hardware supports dynamic spatial multiplexing powersave, 1015 * ie. can turn off all but one chain and then wake the rest 1016 * up as required after, for example, rts/cts handshake. 1017 * 1018 * @IEEE80211_HW_SUPPORTS_UAPSD: 1019 * Hardware supports Unscheduled Automatic Power Save Delivery 1020 * (U-APSD) in managed mode. The mode is configured with 1021 * conf_tx() operation. 1022 * 1023 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1024 * Hardware can provide ack status reports of Tx frames to 1025 * the stack. 1026 * 1027 * @IEEE80211_HW_CONNECTION_MONITOR: 1028 * The hardware performs its own connection monitoring, including 1029 * periodic keep-alives to the AP and probing the AP on beacon loss. 1030 * When this flag is set, signaling beacon-loss will cause an immediate 1031 * change to disassociated state. 1032 * 1033 * @IEEE80211_HW_SUPPORTS_CQM_RSSI: 1034 * Hardware can do connection quality monitoring - i.e. it can monitor 1035 * connection quality related parameters, such as the RSSI level and 1036 * provide notifications if configured trigger levels are reached. 1037 * 1038 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1039 * This device needs to know the DTIM period for the BSS before 1040 * associating. 1041 */ 1042enum ieee80211_hw_flags { 1043 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1044 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1045 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1046 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1047 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1048 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1049 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1050 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1051 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1052 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1053 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1054 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1055 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1056 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1057 IEEE80211_HW_BEACON_FILTER = 1<<14, 1058 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1059 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1060 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1061 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1062 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1063 IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20, 1064}; 1065 1066/** 1067 * struct ieee80211_hw - hardware information and state 1068 * 1069 * This structure contains the configuration and hardware 1070 * information for an 802.11 PHY. 1071 * 1072 * @wiphy: This points to the &struct wiphy allocated for this 1073 * 802.11 PHY. You must fill in the @perm_addr and @dev 1074 * members of this structure using SET_IEEE80211_DEV() 1075 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1076 * bands (with channels, bitrates) are registered here. 1077 * 1078 * @conf: &struct ieee80211_conf, device configuration, don't use. 1079 * 1080 * @priv: pointer to private area that was allocated for driver use 1081 * along with this structure. 1082 * 1083 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1084 * 1085 * @extra_tx_headroom: headroom to reserve in each transmit skb 1086 * for use by the driver (e.g. for transmit headers.) 1087 * 1088 * @channel_change_time: time (in microseconds) it takes to change channels. 1089 * 1090 * @max_signal: Maximum value for signal (rssi) in RX information, used 1091 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1092 * 1093 * @max_listen_interval: max listen interval in units of beacon interval 1094 * that HW supports 1095 * 1096 * @queues: number of available hardware transmit queues for 1097 * data packets. WMM/QoS requires at least four, these 1098 * queues need to have configurable access parameters. 1099 * 1100 * @rate_control_algorithm: rate control algorithm for this hardware. 1101 * If unset (NULL), the default algorithm will be used. Must be 1102 * set before calling ieee80211_register_hw(). 1103 * 1104 * @vif_data_size: size (in bytes) of the drv_priv data area 1105 * within &struct ieee80211_vif. 1106 * @sta_data_size: size (in bytes) of the drv_priv data area 1107 * within &struct ieee80211_sta. 1108 * 1109 * @max_rates: maximum number of alternate rate retry stages 1110 * @max_rate_tries: maximum number of tries for each stage 1111 * 1112 * @napi_weight: weight used for NAPI polling. You must specify an 1113 * appropriate value here if a napi_poll operation is provided 1114 * by your driver. 1115 */ 1116struct ieee80211_hw { 1117 struct ieee80211_conf conf; 1118 struct wiphy *wiphy; 1119 const char *rate_control_algorithm; 1120 void *priv; 1121 u32 flags; 1122 unsigned int extra_tx_headroom; 1123 int channel_change_time; 1124 int vif_data_size; 1125 int sta_data_size; 1126 int napi_weight; 1127 u16 queues; 1128 u16 max_listen_interval; 1129 s8 max_signal; 1130 u8 max_rates; 1131 u8 max_rate_tries; 1132}; 1133 1134/** 1135 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1136 * 1137 * @wiphy: the &struct wiphy which we want to query 1138 * 1139 * mac80211 drivers can use this to get to their respective 1140 * &struct ieee80211_hw. Drivers wishing to get to their own private 1141 * structure can then access it via hw->priv. Note that mac802111 drivers should 1142 * not use wiphy_priv() to try to get their private driver structure as this 1143 * is already used internally by mac80211. 1144 */ 1145struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1146 1147/** 1148 * SET_IEEE80211_DEV - set device for 802.11 hardware 1149 * 1150 * @hw: the &struct ieee80211_hw to set the device for 1151 * @dev: the &struct device of this 802.11 device 1152 */ 1153static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1154{ 1155 set_wiphy_dev(hw->wiphy, dev); 1156} 1157 1158/** 1159 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1160 * 1161 * @hw: the &struct ieee80211_hw to set the MAC address for 1162 * @addr: the address to set 1163 */ 1164static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1165{ 1166 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1167} 1168 1169static inline struct ieee80211_rate * 1170ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1171 const struct ieee80211_tx_info *c) 1172{ 1173 if (WARN_ON(c->control.rates[0].idx < 0)) 1174 return NULL; 1175 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1176} 1177 1178static inline struct ieee80211_rate * 1179ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1180 const struct ieee80211_tx_info *c) 1181{ 1182 if (c->control.rts_cts_rate_idx < 0) 1183 return NULL; 1184 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1185} 1186 1187static inline struct ieee80211_rate * 1188ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1189 const struct ieee80211_tx_info *c, int idx) 1190{ 1191 if (c->control.rates[idx + 1].idx < 0) 1192 return NULL; 1193 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1194} 1195 1196/** 1197 * DOC: Hardware crypto acceleration 1198 * 1199 * mac80211 is capable of taking advantage of many hardware 1200 * acceleration designs for encryption and decryption operations. 1201 * 1202 * The set_key() callback in the &struct ieee80211_ops for a given 1203 * device is called to enable hardware acceleration of encryption and 1204 * decryption. The callback takes a @sta parameter that will be NULL 1205 * for default keys or keys used for transmission only, or point to 1206 * the station information for the peer for individual keys. 1207 * Multiple transmission keys with the same key index may be used when 1208 * VLANs are configured for an access point. 1209 * 1210 * When transmitting, the TX control data will use the @hw_key_idx 1211 * selected by the driver by modifying the &struct ieee80211_key_conf 1212 * pointed to by the @key parameter to the set_key() function. 1213 * 1214 * The set_key() call for the %SET_KEY command should return 0 if 1215 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1216 * added; if you return 0 then hw_key_idx must be assigned to the 1217 * hardware key index, you are free to use the full u8 range. 1218 * 1219 * When the cmd is %DISABLE_KEY then it must succeed. 1220 * 1221 * Note that it is permissible to not decrypt a frame even if a key 1222 * for it has been uploaded to hardware, the stack will not make any 1223 * decision based on whether a key has been uploaded or not but rather 1224 * based on the receive flags. 1225 * 1226 * The &struct ieee80211_key_conf structure pointed to by the @key 1227 * parameter is guaranteed to be valid until another call to set_key() 1228 * removes it, but it can only be used as a cookie to differentiate 1229 * keys. 1230 * 1231 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1232 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1233 * handler. 1234 * The update_tkip_key() call updates the driver with the new phase 1 key. 1235 * This happens everytime the iv16 wraps around (every 65536 packets). The 1236 * set_key() call will happen only once for each key (unless the AP did 1237 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1238 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1239 * handler is software decryption with wrap around of iv16. 1240 */ 1241 1242/** 1243 * DOC: Powersave support 1244 * 1245 * mac80211 has support for various powersave implementations. 1246 * 1247 * First, it can support hardware that handles all powersaving by itself, 1248 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1249 * flag. In that case, it will be told about the desired powersave mode 1250 * with the %IEEE80211_CONF_PS flag depending on the association status. 1251 * The hardware must take care of sending nullfunc frames when necessary, 1252 * i.e. when entering and leaving powersave mode. The hardware is required 1253 * to look at the AID in beacons and signal to the AP that it woke up when 1254 * it finds traffic directed to it. 1255 * 1256 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1257 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1258 * with hardware wakeup and sleep states. Driver is responsible for waking 1259 * up the hardware before issueing commands to the hardware and putting it 1260 * back to sleep at approriate times. 1261 * 1262 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1263 * buffered multicast/broadcast frames after the beacon. Also it must be 1264 * possible to send frames and receive the acknowledment frame. 1265 * 1266 * Other hardware designs cannot send nullfunc frames by themselves and also 1267 * need software support for parsing the TIM bitmap. This is also supported 1268 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1269 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1270 * required to pass up beacons. The hardware is still required to handle 1271 * waking up for multicast traffic; if it cannot the driver must handle that 1272 * as best as it can, mac80211 is too slow to do that. 1273 * 1274 * Dynamic powersave is an extension to normal powersave in which the 1275 * hardware stays awake for a user-specified period of time after sending a 1276 * frame so that reply frames need not be buffered and therefore delayed to 1277 * the next wakeup. It's compromise of getting good enough latency when 1278 * there's data traffic and still saving significantly power in idle 1279 * periods. 1280 * 1281 * Dynamic powersave is supported by simply mac80211 enabling and disabling 1282 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1283 * flag and mac80211 will handle everything automatically. Additionally, 1284 * hardware having support for the dynamic PS feature may set the 1285 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1286 * dynamic PS mode itself. The driver needs to look at the 1287 * @dynamic_ps_timeout hardware configuration value and use it that value 1288 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1289 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1290 * enabled whenever user has enabled powersave. 1291 * 1292 * Some hardware need to toggle a single shared antenna between WLAN and 1293 * Bluetooth to facilitate co-existence. These types of hardware set 1294 * limitations on the use of host controlled dynamic powersave whenever there 1295 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1296 * driver may request temporarily going into full power save, in order to 1297 * enable toggling the antenna between BT and WLAN. If the driver requests 1298 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1299 * temporarily set to zero until the driver re-enables dynamic powersave. 1300 * 1301 * Driver informs U-APSD client support by enabling 1302 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1303 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1304 * Nullfunc frames and stay awake until the service period has ended. To 1305 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1306 * from that AC are transmitted with powersave enabled. 1307 * 1308 * Note: U-APSD client mode is not yet supported with 1309 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1310 */ 1311 1312/** 1313 * DOC: Beacon filter support 1314 * 1315 * Some hardware have beacon filter support to reduce host cpu wakeups 1316 * which will reduce system power consumption. It usuallly works so that 1317 * the firmware creates a checksum of the beacon but omits all constantly 1318 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1319 * beacon is forwarded to the host, otherwise it will be just dropped. That 1320 * way the host will only receive beacons where some relevant information 1321 * (for example ERP protection or WMM settings) have changed. 1322 * 1323 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER 1324 * hardware capability. The driver needs to enable beacon filter support 1325 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1326 * power save is enabled, the stack will not check for beacon loss and the 1327 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1328 * 1329 * The time (or number of beacons missed) until the firmware notifies the 1330 * driver of a beacon loss event (which in turn causes the driver to call 1331 * ieee80211_beacon_loss()) should be configurable and will be controlled 1332 * by mac80211 and the roaming algorithm in the future. 1333 * 1334 * Since there may be constantly changing information elements that nothing 1335 * in the software stack cares about, we will, in the future, have mac80211 1336 * tell the driver which information elements are interesting in the sense 1337 * that we want to see changes in them. This will include 1338 * - a list of information element IDs 1339 * - a list of OUIs for the vendor information element 1340 * 1341 * Ideally, the hardware would filter out any beacons without changes in the 1342 * requested elements, but if it cannot support that it may, at the expense 1343 * of some efficiency, filter out only a subset. For example, if the device 1344 * doesn't support checking for OUIs it should pass up all changes in all 1345 * vendor information elements. 1346 * 1347 * Note that change, for the sake of simplification, also includes information 1348 * elements appearing or disappearing from the beacon. 1349 * 1350 * Some hardware supports an "ignore list" instead, just make sure nothing 1351 * that was requested is on the ignore list, and include commonly changing 1352 * information element IDs in the ignore list, for example 11 (BSS load) and 1353 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1354 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1355 * it could also include some currently unused IDs. 1356 * 1357 * 1358 * In addition to these capabilities, hardware should support notifying the 1359 * host of changes in the beacon RSSI. This is relevant to implement roaming 1360 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1361 * the received data packets). This can consist in notifying the host when 1362 * the RSSI changes significantly or when it drops below or rises above 1363 * configurable thresholds. In the future these thresholds will also be 1364 * configured by mac80211 (which gets them from userspace) to implement 1365 * them as the roaming algorithm requires. 1366 * 1367 * If the hardware cannot implement this, the driver should ask it to 1368 * periodically pass beacon frames to the host so that software can do the 1369 * signal strength threshold checking. 1370 */ 1371 1372/** 1373 * DOC: Spatial multiplexing power save 1374 * 1375 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1376 * power in an 802.11n implementation. For details on the mechanism 1377 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1378 * "11.2.3 SM power save". 1379 * 1380 * The mac80211 implementation is capable of sending action frames 1381 * to update the AP about the station's SMPS mode, and will instruct 1382 * the driver to enter the specific mode. It will also announce the 1383 * requested SMPS mode during the association handshake. Hardware 1384 * support for this feature is required, and can be indicated by 1385 * hardware flags. 1386 * 1387 * The default mode will be "automatic", which nl80211/cfg80211 1388 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1389 * turned off otherwise. 1390 * 1391 * To support this feature, the driver must set the appropriate 1392 * hardware support flags, and handle the SMPS flag to the config() 1393 * operation. It will then with this mechanism be instructed to 1394 * enter the requested SMPS mode while associated to an HT AP. 1395 */ 1396 1397/** 1398 * DOC: Frame filtering 1399 * 1400 * mac80211 requires to see many management frames for proper 1401 * operation, and users may want to see many more frames when 1402 * in monitor mode. However, for best CPU usage and power consumption, 1403 * having as few frames as possible percolate through the stack is 1404 * desirable. Hence, the hardware should filter as much as possible. 1405 * 1406 * To achieve this, mac80211 uses filter flags (see below) to tell 1407 * the driver's configure_filter() function which frames should be 1408 * passed to mac80211 and which should be filtered out. 1409 * 1410 * Before configure_filter() is invoked, the prepare_multicast() 1411 * callback is invoked with the parameters @mc_count and @mc_list 1412 * for the combined multicast address list of all virtual interfaces. 1413 * It's use is optional, and it returns a u64 that is passed to 1414 * configure_filter(). Additionally, configure_filter() has the 1415 * arguments @changed_flags telling which flags were changed and 1416 * @total_flags with the new flag states. 1417 * 1418 * If your device has no multicast address filters your driver will 1419 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1420 * parameter to see whether multicast frames should be accepted 1421 * or dropped. 1422 * 1423 * All unsupported flags in @total_flags must be cleared. 1424 * Hardware does not support a flag if it is incapable of _passing_ 1425 * the frame to the stack. Otherwise the driver must ignore 1426 * the flag, but not clear it. 1427 * You must _only_ clear the flag (announce no support for the 1428 * flag to mac80211) if you are not able to pass the packet type 1429 * to the stack (so the hardware always filters it). 1430 * So for example, you should clear @FIF_CONTROL, if your hardware 1431 * always filters control frames. If your hardware always passes 1432 * control frames to the kernel and is incapable of filtering them, 1433 * you do _not_ clear the @FIF_CONTROL flag. 1434 * This rule applies to all other FIF flags as well. 1435 */ 1436 1437/** 1438 * enum ieee80211_filter_flags - hardware filter flags 1439 * 1440 * These flags determine what the filter in hardware should be 1441 * programmed to let through and what should not be passed to the 1442 * stack. It is always safe to pass more frames than requested, 1443 * but this has negative impact on power consumption. 1444 * 1445 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1446 * think of the BSS as your network segment and then this corresponds 1447 * to the regular ethernet device promiscuous mode. 1448 * 1449 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1450 * by the user or if the hardware is not capable of filtering by 1451 * multicast address. 1452 * 1453 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1454 * %RX_FLAG_FAILED_FCS_CRC for them) 1455 * 1456 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1457 * the %RX_FLAG_FAILED_PLCP_CRC for them 1458 * 1459 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1460 * to the hardware that it should not filter beacons or probe responses 1461 * by BSSID. Filtering them can greatly reduce the amount of processing 1462 * mac80211 needs to do and the amount of CPU wakeups, so you should 1463 * honour this flag if possible. 1464 * 1465 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1466 * is not set then only those addressed to this station. 1467 * 1468 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1469 * 1470 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1471 * those addressed to this station. 1472 */ 1473enum ieee80211_filter_flags { 1474 FIF_PROMISC_IN_BSS = 1<<0, 1475 FIF_ALLMULTI = 1<<1, 1476 FIF_FCSFAIL = 1<<2, 1477 FIF_PLCPFAIL = 1<<3, 1478 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1479 FIF_CONTROL = 1<<5, 1480 FIF_OTHER_BSS = 1<<6, 1481 FIF_PSPOLL = 1<<7, 1482}; 1483 1484/** 1485 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1486 * 1487 * These flags are used with the ampdu_action() callback in 1488 * &struct ieee80211_ops to indicate which action is needed. 1489 * 1490 * Note that drivers MUST be able to deal with a TX aggregation 1491 * session being stopped even before they OK'ed starting it by 1492 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1493 * might receive the addBA frame and send a delBA right away! 1494 * 1495 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1496 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1497 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1498 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1499 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1500 */ 1501enum ieee80211_ampdu_mlme_action { 1502 IEEE80211_AMPDU_RX_START, 1503 IEEE80211_AMPDU_RX_STOP, 1504 IEEE80211_AMPDU_TX_START, 1505 IEEE80211_AMPDU_TX_STOP, 1506 IEEE80211_AMPDU_TX_OPERATIONAL, 1507}; 1508 1509/** 1510 * struct ieee80211_ops - callbacks from mac80211 to the driver 1511 * 1512 * This structure contains various callbacks that the driver may 1513 * handle or, in some cases, must handle, for example to configure 1514 * the hardware to a new channel or to transmit a frame. 1515 * 1516 * @tx: Handler that 802.11 module calls for each transmitted frame. 1517 * skb contains the buffer starting from the IEEE 802.11 header. 1518 * The low-level driver should send the frame out based on 1519 * configuration in the TX control data. This handler should, 1520 * preferably, never fail and stop queues appropriately, more 1521 * importantly, however, it must never fail for A-MPDU-queues. 1522 * This function should return NETDEV_TX_OK except in very 1523 * limited cases. 1524 * Must be implemented and atomic. 1525 * 1526 * @start: Called before the first netdevice attached to the hardware 1527 * is enabled. This should turn on the hardware and must turn on 1528 * frame reception (for possibly enabled monitor interfaces.) 1529 * Returns negative error codes, these may be seen in userspace, 1530 * or zero. 1531 * When the device is started it should not have a MAC address 1532 * to avoid acknowledging frames before a non-monitor device 1533 * is added. 1534 * Must be implemented and can sleep. 1535 * 1536 * @stop: Called after last netdevice attached to the hardware 1537 * is disabled. This should turn off the hardware (at least 1538 * it must turn off frame reception.) 1539 * May be called right after add_interface if that rejects 1540 * an interface. If you added any work onto the mac80211 workqueue 1541 * you should ensure to cancel it on this callback. 1542 * Must be implemented and can sleep. 1543 * 1544 * @add_interface: Called when a netdevice attached to the hardware is 1545 * enabled. Because it is not called for monitor mode devices, @start 1546 * and @stop must be implemented. 1547 * The driver should perform any initialization it needs before 1548 * the device can be enabled. The initial configuration for the 1549 * interface is given in the conf parameter. 1550 * The callback may refuse to add an interface by returning a 1551 * negative error code (which will be seen in userspace.) 1552 * Must be implemented and can sleep. 1553 * 1554 * @remove_interface: Notifies a driver that an interface is going down. 1555 * The @stop callback is called after this if it is the last interface 1556 * and no monitor interfaces are present. 1557 * When all interfaces are removed, the MAC address in the hardware 1558 * must be cleared so the device no longer acknowledges packets, 1559 * the mac_addr member of the conf structure is, however, set to the 1560 * MAC address of the device going away. 1561 * Hence, this callback must be implemented. It can sleep. 1562 * 1563 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1564 * function to change hardware configuration, e.g., channel. 1565 * This function should never fail but returns a negative error code 1566 * if it does. The callback can sleep. 1567 * 1568 * @bss_info_changed: Handler for configuration requests related to BSS 1569 * parameters that may vary during BSS's lifespan, and may affect low 1570 * level driver (e.g. assoc/disassoc status, erp parameters). 1571 * This function should not be used if no BSS has been set, unless 1572 * for association indication. The @changed parameter indicates which 1573 * of the bss parameters has changed when a call is made. The callback 1574 * can sleep. 1575 * 1576 * @prepare_multicast: Prepare for multicast filter configuration. 1577 * This callback is optional, and its return value is passed 1578 * to configure_filter(). This callback must be atomic. 1579 * 1580 * @configure_filter: Configure the device's RX filter. 1581 * See the section "Frame filtering" for more information. 1582 * This callback must be implemented and can sleep. 1583 * 1584 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1585 * must be set or cleared for a given STA. Must be atomic. 1586 * 1587 * @set_key: See the section "Hardware crypto acceleration" 1588 * This callback is only called between add_interface and 1589 * remove_interface calls, i.e. while the given virtual interface 1590 * is enabled. 1591 * Returns a negative error code if the key can't be added. 1592 * The callback can sleep. 1593 * 1594 * @update_tkip_key: See the section "Hardware crypto acceleration" 1595 * This callback will be called in the context of Rx. Called for drivers 1596 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1597 * The callback must be atomic. 1598 * 1599 * @hw_scan: Ask the hardware to service the scan request, no need to start 1600 * the scan state machine in stack. The scan must honour the channel 1601 * configuration done by the regulatory agent in the wiphy's 1602 * registered bands. The hardware (or the driver) needs to make sure 1603 * that power save is disabled. 1604 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1605 * entire IEs after the SSID, so that drivers need not look at these 1606 * at all but just send them after the SSID -- mac80211 includes the 1607 * (extended) supported rates and HT information (where applicable). 1608 * When the scan finishes, ieee80211_scan_completed() must be called; 1609 * note that it also must be called when the scan cannot finish due to 1610 * any error unless this callback returned a negative error code. 1611 * The callback can sleep. 1612 * 1613 * @sw_scan_start: Notifier function that is called just before a software scan 1614 * is started. Can be NULL, if the driver doesn't need this notification. 1615 * The callback can sleep. 1616 * 1617 * @sw_scan_complete: Notifier function that is called just after a 1618 * software scan finished. Can be NULL, if the driver doesn't need 1619 * this notification. 1620 * The callback can sleep. 1621 * 1622 * @get_stats: Return low-level statistics. 1623 * Returns zero if statistics are available. 1624 * The callback can sleep. 1625 * 1626 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1627 * callback should be provided to read the TKIP transmit IVs (both IV32 1628 * and IV16) for the given key from hardware. 1629 * The callback must be atomic. 1630 * 1631 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1632 * The callback can sleep. 1633 * 1634 * @sta_add: Notifies low level driver about addition of an associated station, 1635 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1636 * 1637 * @sta_remove: Notifies low level driver about removal of an associated 1638 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1639 * 1640 * @sta_notify: Notifies low level driver about power state transition of an 1641 * associated station, AP, IBSS/WDS/mesh peer etc. Must be atomic. 1642 * 1643 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1644 * bursting) for a hardware TX queue. 1645 * Returns a negative error code on failure. 1646 * The callback can sleep. 1647 * 1648 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1649 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1650 * required function. 1651 * The callback can sleep. 1652 * 1653 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1654 * Currently, this is only used for IBSS mode debugging. Is not a 1655 * required function. 1656 * The callback can sleep. 1657 * 1658 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1659 * with other STAs in the IBSS. This is only used in IBSS mode. This 1660 * function is optional if the firmware/hardware takes full care of 1661 * TSF synchronization. 1662 * The callback can sleep. 1663 * 1664 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1665 * This is needed only for IBSS mode and the result of this function is 1666 * used to determine whether to reply to Probe Requests. 1667 * Returns non-zero if this device sent the last beacon. 1668 * The callback can sleep. 1669 * 1670 * @ampdu_action: Perform a certain A-MPDU action 1671 * The RA/TID combination determines the destination and TID we want 1672 * the ampdu action to be performed for. The action is defined through 1673 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1674 * is the first frame we expect to perform the action on. Notice 1675 * that TX/RX_STOP can pass NULL for this parameter. 1676 * Returns a negative error code on failure. 1677 * The callback can sleep. 1678 * 1679 * @get_survey: Return per-channel survey information 1680 * 1681 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 1682 * need to set wiphy->rfkill_poll to %true before registration, 1683 * and need to call wiphy_rfkill_set_hw_state() in the callback. 1684 * The callback can sleep. 1685 * 1686 * @set_coverage_class: Set slot time for given coverage class as specified 1687 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 1688 * accordingly. This callback is not required and may sleep. 1689 * 1690 * @testmode_cmd: Implement a cfg80211 test mode command. 1691 * The callback can sleep. 1692 * 1693 * @flush: Flush all pending frames from the hardware queue, making sure 1694 * that the hardware queues are empty. If the parameter @drop is set 1695 * to %true, pending frames may be dropped. The callback can sleep. 1696 * 1697 * @channel_switch: Drivers that need (or want) to offload the channel 1698 * switch operation for CSAs received from the AP may implement this 1699 * callback. They must then call ieee80211_chswitch_done() to indicate 1700 * completion of the channel switch. 1701 * 1702 * @napi_poll: Poll Rx queue for incoming data frames. 1703 */ 1704struct ieee80211_ops { 1705 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1706 int (*start)(struct ieee80211_hw *hw); 1707 void (*stop)(struct ieee80211_hw *hw); 1708 int (*add_interface)(struct ieee80211_hw *hw, 1709 struct ieee80211_vif *vif); 1710 void (*remove_interface)(struct ieee80211_hw *hw, 1711 struct ieee80211_vif *vif); 1712 int (*config)(struct ieee80211_hw *hw, u32 changed); 1713 void (*bss_info_changed)(struct ieee80211_hw *hw, 1714 struct ieee80211_vif *vif, 1715 struct ieee80211_bss_conf *info, 1716 u32 changed); 1717 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 1718 struct netdev_hw_addr_list *mc_list); 1719 void (*configure_filter)(struct ieee80211_hw *hw, 1720 unsigned int changed_flags, 1721 unsigned int *total_flags, 1722 u64 multicast); 1723 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1724 bool set); 1725 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1726 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 1727 struct ieee80211_key_conf *key); 1728 void (*update_tkip_key)(struct ieee80211_hw *hw, 1729 struct ieee80211_vif *vif, 1730 struct ieee80211_key_conf *conf, 1731 struct ieee80211_sta *sta, 1732 u32 iv32, u16 *phase1key); 1733 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1734 struct cfg80211_scan_request *req); 1735 void (*sw_scan_start)(struct ieee80211_hw *hw); 1736 void (*sw_scan_complete)(struct ieee80211_hw *hw); 1737 int (*get_stats)(struct ieee80211_hw *hw, 1738 struct ieee80211_low_level_stats *stats); 1739 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1740 u32 *iv32, u16 *iv16); 1741 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1742 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1743 struct ieee80211_sta *sta); 1744 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1745 struct ieee80211_sta *sta); 1746 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1747 enum sta_notify_cmd, struct ieee80211_sta *sta); 1748 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1749 const struct ieee80211_tx_queue_params *params); 1750 u64 (*get_tsf)(struct ieee80211_hw *hw); 1751 void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); 1752 void (*reset_tsf)(struct ieee80211_hw *hw); 1753 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1754 int (*ampdu_action)(struct ieee80211_hw *hw, 1755 struct ieee80211_vif *vif, 1756 enum ieee80211_ampdu_mlme_action action, 1757 struct ieee80211_sta *sta, u16 tid, u16 *ssn); 1758 int (*get_survey)(struct ieee80211_hw *hw, int idx, 1759 struct survey_info *survey); 1760 void (*rfkill_poll)(struct ieee80211_hw *hw); 1761 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 1762#ifdef CONFIG_NL80211_TESTMODE 1763 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 1764#endif 1765 void (*flush)(struct ieee80211_hw *hw, bool drop); 1766 void (*channel_switch)(struct ieee80211_hw *hw, 1767 struct ieee80211_channel_switch *ch_switch); 1768 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 1769}; 1770 1771/** 1772 * ieee80211_alloc_hw - Allocate a new hardware device 1773 * 1774 * This must be called once for each hardware device. The returned pointer 1775 * must be used to refer to this device when calling other functions. 1776 * mac80211 allocates a private data area for the driver pointed to by 1777 * @priv in &struct ieee80211_hw, the size of this area is given as 1778 * @priv_data_len. 1779 * 1780 * @priv_data_len: length of private data 1781 * @ops: callbacks for this device 1782 */ 1783struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1784 const struct ieee80211_ops *ops); 1785 1786/** 1787 * ieee80211_register_hw - Register hardware device 1788 * 1789 * You must call this function before any other functions in 1790 * mac80211. Note that before a hardware can be registered, you 1791 * need to fill the contained wiphy's information. 1792 * 1793 * @hw: the device to register as returned by ieee80211_alloc_hw() 1794 */ 1795int ieee80211_register_hw(struct ieee80211_hw *hw); 1796 1797#ifdef CONFIG_MAC80211_LEDS 1798extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1799extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1800extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1801extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1802#endif 1803/** 1804 * ieee80211_get_tx_led_name - get name of TX LED 1805 * 1806 * mac80211 creates a transmit LED trigger for each wireless hardware 1807 * that can be used to drive LEDs if your driver registers a LED device. 1808 * This function returns the name (or %NULL if not configured for LEDs) 1809 * of the trigger so you can automatically link the LED device. 1810 * 1811 * @hw: the hardware to get the LED trigger name for 1812 */ 1813static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1814{ 1815#ifdef CONFIG_MAC80211_LEDS 1816 return __ieee80211_get_tx_led_name(hw); 1817#else 1818 return NULL; 1819#endif 1820} 1821 1822/** 1823 * ieee80211_get_rx_led_name - get name of RX LED 1824 * 1825 * mac80211 creates a receive LED trigger for each wireless hardware 1826 * that can be used to drive LEDs if your driver registers a LED device. 1827 * This function returns the name (or %NULL if not configured for LEDs) 1828 * of the trigger so you can automatically link the LED device. 1829 * 1830 * @hw: the hardware to get the LED trigger name for 1831 */ 1832static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1833{ 1834#ifdef CONFIG_MAC80211_LEDS 1835 return __ieee80211_get_rx_led_name(hw); 1836#else 1837 return NULL; 1838#endif 1839} 1840 1841/** 1842 * ieee80211_get_assoc_led_name - get name of association LED 1843 * 1844 * mac80211 creates a association LED trigger for each wireless hardware 1845 * that can be used to drive LEDs if your driver registers a LED device. 1846 * This function returns the name (or %NULL if not configured for LEDs) 1847 * of the trigger so you can automatically link the LED device. 1848 * 1849 * @hw: the hardware to get the LED trigger name for 1850 */ 1851static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1852{ 1853#ifdef CONFIG_MAC80211_LEDS 1854 return __ieee80211_get_assoc_led_name(hw); 1855#else 1856 return NULL; 1857#endif 1858} 1859 1860/** 1861 * ieee80211_get_radio_led_name - get name of radio LED 1862 * 1863 * mac80211 creates a radio change LED trigger for each wireless hardware 1864 * that can be used to drive LEDs if your driver registers a LED device. 1865 * This function returns the name (or %NULL if not configured for LEDs) 1866 * of the trigger so you can automatically link the LED device. 1867 * 1868 * @hw: the hardware to get the LED trigger name for 1869 */ 1870static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1871{ 1872#ifdef CONFIG_MAC80211_LEDS 1873 return __ieee80211_get_radio_led_name(hw); 1874#else 1875 return NULL; 1876#endif 1877} 1878 1879/** 1880 * ieee80211_unregister_hw - Unregister a hardware device 1881 * 1882 * This function instructs mac80211 to free allocated resources 1883 * and unregister netdevices from the networking subsystem. 1884 * 1885 * @hw: the hardware to unregister 1886 */ 1887void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1888 1889/** 1890 * ieee80211_free_hw - free hardware descriptor 1891 * 1892 * This function frees everything that was allocated, including the 1893 * private data for the driver. You must call ieee80211_unregister_hw() 1894 * before calling this function. 1895 * 1896 * @hw: the hardware to free 1897 */ 1898void ieee80211_free_hw(struct ieee80211_hw *hw); 1899 1900/** 1901 * ieee80211_restart_hw - restart hardware completely 1902 * 1903 * Call this function when the hardware was restarted for some reason 1904 * (hardware error, ...) and the driver is unable to restore its state 1905 * by itself. mac80211 assumes that at this point the driver/hardware 1906 * is completely uninitialised and stopped, it starts the process by 1907 * calling the ->start() operation. The driver will need to reset all 1908 * internal state that it has prior to calling this function. 1909 * 1910 * @hw: the hardware to restart 1911 */ 1912void ieee80211_restart_hw(struct ieee80211_hw *hw); 1913 1914/** ieee80211_napi_schedule - schedule NAPI poll 1915 * 1916 * Use this function to schedule NAPI polling on a device. 1917 * 1918 * @hw: the hardware to start polling 1919 */ 1920void ieee80211_napi_schedule(struct ieee80211_hw *hw); 1921 1922/** ieee80211_napi_complete - complete NAPI polling 1923 * 1924 * Use this function to finish NAPI polling on a device. 1925 * 1926 * @hw: the hardware to stop polling 1927 */ 1928void ieee80211_napi_complete(struct ieee80211_hw *hw); 1929 1930/** 1931 * ieee80211_rx - receive frame 1932 * 1933 * Use this function to hand received frames to mac80211. The receive 1934 * buffer in @skb must start with an IEEE 802.11 header. In case of a 1935 * paged @skb is used, the driver is recommended to put the ieee80211 1936 * header of the frame on the linear part of the @skb to avoid memory 1937 * allocation and/or memcpy by the stack. 1938 * 1939 * This function may not be called in IRQ context. Calls to this function 1940 * for a single hardware must be synchronized against each other. Calls to 1941 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 1942 * mixed for a single hardware. 1943 * 1944 * In process context use instead ieee80211_rx_ni(). 1945 * 1946 * @hw: the hardware this frame came in on 1947 * @skb: the buffer to receive, owned by mac80211 after this call 1948 */ 1949void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 1950 1951/** 1952 * ieee80211_rx_irqsafe - receive frame 1953 * 1954 * Like ieee80211_rx() but can be called in IRQ context 1955 * (internally defers to a tasklet.) 1956 * 1957 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 1958 * be mixed for a single hardware. 1959 * 1960 * @hw: the hardware this frame came in on 1961 * @skb: the buffer to receive, owned by mac80211 after this call 1962 */ 1963void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 1964 1965/** 1966 * ieee80211_rx_ni - receive frame (in process context) 1967 * 1968 * Like ieee80211_rx() but can be called in process context 1969 * (internally disables bottom halves). 1970 * 1971 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 1972 * not be mixed for a single hardware. 1973 * 1974 * @hw: the hardware this frame came in on 1975 * @skb: the buffer to receive, owned by mac80211 after this call 1976 */ 1977static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 1978 struct sk_buff *skb) 1979{ 1980 local_bh_disable(); 1981 ieee80211_rx(hw, skb); 1982 local_bh_enable(); 1983} 1984 1985/* 1986 * The TX headroom reserved by mac80211 for its own tx_status functions. 1987 * This is enough for the radiotap header. 1988 */ 1989#define IEEE80211_TX_STATUS_HEADROOM 13 1990 1991/** 1992 * ieee80211_tx_status - transmit status callback 1993 * 1994 * Call this function for all transmitted frames after they have been 1995 * transmitted. It is permissible to not call this function for 1996 * multicast frames but this can affect statistics. 1997 * 1998 * This function may not be called in IRQ context. Calls to this function 1999 * for a single hardware must be synchronized against each other. Calls 2000 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 2001 * for a single hardware. 2002 * 2003 * @hw: the hardware the frame was transmitted by 2004 * @skb: the frame that was transmitted, owned by mac80211 after this call 2005 */ 2006void ieee80211_tx_status(struct ieee80211_hw *hw, 2007 struct sk_buff *skb); 2008 2009/** 2010 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 2011 * 2012 * Like ieee80211_tx_status() but can be called in IRQ context 2013 * (internally defers to a tasklet.) 2014 * 2015 * Calls to this function and ieee80211_tx_status() may not be mixed for a 2016 * single hardware. 2017 * 2018 * @hw: the hardware the frame was transmitted by 2019 * @skb: the frame that was transmitted, owned by mac80211 after this call 2020 */ 2021void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2022 struct sk_buff *skb); 2023 2024/** 2025 * ieee80211_beacon_get_tim - beacon generation function 2026 * @hw: pointer obtained from ieee80211_alloc_hw(). 2027 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2028 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2029 * Set to 0 if invalid (in non-AP modes). 2030 * @tim_length: pointer to variable that will receive the TIM IE length, 2031 * (including the ID and length bytes!). 2032 * Set to 0 if invalid (in non-AP modes). 2033 * 2034 * If the driver implements beaconing modes, it must use this function to 2035 * obtain the beacon frame/template. 2036 * 2037 * If the beacon frames are generated by the host system (i.e., not in 2038 * hardware/firmware), the driver uses this function to get each beacon 2039 * frame from mac80211 -- it is responsible for calling this function 2040 * before the beacon is needed (e.g. based on hardware interrupt). 2041 * 2042 * If the beacon frames are generated by the device, then the driver 2043 * must use the returned beacon as the template and change the TIM IE 2044 * according to the current DTIM parameters/TIM bitmap. 2045 * 2046 * The driver is responsible for freeing the returned skb. 2047 */ 2048struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2049 struct ieee80211_vif *vif, 2050 u16 *tim_offset, u16 *tim_length); 2051 2052/** 2053 * ieee80211_beacon_get - beacon generation function 2054 * @hw: pointer obtained from ieee80211_alloc_hw(). 2055 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2056 * 2057 * See ieee80211_beacon_get_tim(). 2058 */ 2059static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2060 struct ieee80211_vif *vif) 2061{ 2062 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2063} 2064 2065/** 2066 * ieee80211_pspoll_get - retrieve a PS Poll template 2067 * @hw: pointer obtained from ieee80211_alloc_hw(). 2068 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2069 * 2070 * Creates a PS Poll a template which can, for example, uploaded to 2071 * hardware. The template must be updated after association so that correct 2072 * AID, BSSID and MAC address is used. 2073 * 2074 * Note: Caller (or hardware) is responsible for setting the 2075 * &IEEE80211_FCTL_PM bit. 2076 */ 2077struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2078 struct ieee80211_vif *vif); 2079 2080/** 2081 * ieee80211_nullfunc_get - retrieve a nullfunc template 2082 * @hw: pointer obtained from ieee80211_alloc_hw(). 2083 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2084 * 2085 * Creates a Nullfunc template which can, for example, uploaded to 2086 * hardware. The template must be updated after association so that correct 2087 * BSSID and address is used. 2088 * 2089 * Note: Caller (or hardware) is responsible for setting the 2090 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2091 */ 2092struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2093 struct ieee80211_vif *vif); 2094 2095/** 2096 * ieee80211_probereq_get - retrieve a Probe Request template 2097 * @hw: pointer obtained from ieee80211_alloc_hw(). 2098 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2099 * @ssid: SSID buffer 2100 * @ssid_len: length of SSID 2101 * @ie: buffer containing all IEs except SSID for the template 2102 * @ie_len: length of the IE buffer 2103 * 2104 * Creates a Probe Request template which can, for example, be uploaded to 2105 * hardware. 2106 */ 2107struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2108 struct ieee80211_vif *vif, 2109 const u8 *ssid, size_t ssid_len, 2110 const u8 *ie, size_t ie_len); 2111 2112/** 2113 * ieee80211_rts_get - RTS frame generation function 2114 * @hw: pointer obtained from ieee80211_alloc_hw(). 2115 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2116 * @frame: pointer to the frame that is going to be protected by the RTS. 2117 * @frame_len: the frame length (in octets). 2118 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2119 * @rts: The buffer where to store the RTS frame. 2120 * 2121 * If the RTS frames are generated by the host system (i.e., not in 2122 * hardware/firmware), the low-level driver uses this function to receive 2123 * the next RTS frame from the 802.11 code. The low-level is responsible 2124 * for calling this function before and RTS frame is needed. 2125 */ 2126void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2127 const void *frame, size_t frame_len, 2128 const struct ieee80211_tx_info *frame_txctl, 2129 struct ieee80211_rts *rts); 2130 2131/** 2132 * ieee80211_rts_duration - Get the duration field for an RTS frame 2133 * @hw: pointer obtained from ieee80211_alloc_hw(). 2134 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2135 * @frame_len: the length of the frame that is going to be protected by the RTS. 2136 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2137 * 2138 * If the RTS is generated in firmware, but the host system must provide 2139 * the duration field, the low-level driver uses this function to receive 2140 * the duration field value in little-endian byteorder. 2141 */ 2142__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2143 struct ieee80211_vif *vif, size_t frame_len, 2144 const struct ieee80211_tx_info *frame_txctl); 2145 2146/** 2147 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2148 * @hw: pointer obtained from ieee80211_alloc_hw(). 2149 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2150 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2151 * @frame_len: the frame length (in octets). 2152 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2153 * @cts: The buffer where to store the CTS-to-self frame. 2154 * 2155 * If the CTS-to-self frames are generated by the host system (i.e., not in 2156 * hardware/firmware), the low-level driver uses this function to receive 2157 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2158 * for calling this function before and CTS-to-self frame is needed. 2159 */ 2160void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2161 struct ieee80211_vif *vif, 2162 const void *frame, size_t frame_len, 2163 const struct ieee80211_tx_info *frame_txctl, 2164 struct ieee80211_cts *cts); 2165 2166/** 2167 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2168 * @hw: pointer obtained from ieee80211_alloc_hw(). 2169 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2170 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2171 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2172 * 2173 * If the CTS-to-self is generated in firmware, but the host system must provide 2174 * the duration field, the low-level driver uses this function to receive 2175 * the duration field value in little-endian byteorder. 2176 */ 2177__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2178 struct ieee80211_vif *vif, 2179 size_t frame_len, 2180 const struct ieee80211_tx_info *frame_txctl); 2181 2182/** 2183 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2184 * @hw: pointer obtained from ieee80211_alloc_hw(). 2185 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2186 * @frame_len: the length of the frame. 2187 * @rate: the rate at which the frame is going to be transmitted. 2188 * 2189 * Calculate the duration field of some generic frame, given its 2190 * length and transmission rate (in 100kbps). 2191 */ 2192__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2193 struct ieee80211_vif *vif, 2194 size_t frame_len, 2195 struct ieee80211_rate *rate); 2196 2197/** 2198 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2199 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2200 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2201 * 2202 * Function for accessing buffered broadcast and multicast frames. If 2203 * hardware/firmware does not implement buffering of broadcast/multicast 2204 * frames when power saving is used, 802.11 code buffers them in the host 2205 * memory. The low-level driver uses this function to fetch next buffered 2206 * frame. In most cases, this is used when generating beacon frame. This 2207 * function returns a pointer to the next buffered skb or NULL if no more 2208 * buffered frames are available. 2209 * 2210 * Note: buffered frames are returned only after DTIM beacon frame was 2211 * generated with ieee80211_beacon_get() and the low-level driver must thus 2212 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2213 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2214 * does not need to check for DTIM beacons separately and should be able to 2215 * use common code for all beacons. 2216 */ 2217struct sk_buff * 2218ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2219 2220/** 2221 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 2222 * 2223 * This function computes a TKIP rc4 key for an skb. It computes 2224 * a phase 1 key if needed (iv16 wraps around). This function is to 2225 * be used by drivers which can do HW encryption but need to compute 2226 * to phase 1/2 key in SW. 2227 * 2228 * @keyconf: the parameter passed with the set key 2229 * @skb: the skb for which the key is needed 2230 * @type: TBD 2231 * @key: a buffer to which the key will be written 2232 */ 2233void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 2234 struct sk_buff *skb, 2235 enum ieee80211_tkip_key_type type, u8 *key); 2236/** 2237 * ieee80211_wake_queue - wake specific queue 2238 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2239 * @queue: queue number (counted from zero). 2240 * 2241 * Drivers should use this function instead of netif_wake_queue. 2242 */ 2243void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 2244 2245/** 2246 * ieee80211_stop_queue - stop specific queue 2247 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2248 * @queue: queue number (counted from zero). 2249 * 2250 * Drivers should use this function instead of netif_stop_queue. 2251 */ 2252void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 2253 2254/** 2255 * ieee80211_queue_stopped - test status of the queue 2256 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2257 * @queue: queue number (counted from zero). 2258 * 2259 * Drivers should use this function instead of netif_stop_queue. 2260 */ 2261 2262int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 2263 2264/** 2265 * ieee80211_stop_queues - stop all queues 2266 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2267 * 2268 * Drivers should use this function instead of netif_stop_queue. 2269 */ 2270void ieee80211_stop_queues(struct ieee80211_hw *hw); 2271 2272/** 2273 * ieee80211_wake_queues - wake all queues 2274 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2275 * 2276 * Drivers should use this function instead of netif_wake_queue. 2277 */ 2278void ieee80211_wake_queues(struct ieee80211_hw *hw); 2279 2280/** 2281 * ieee80211_scan_completed - completed hardware scan 2282 * 2283 * When hardware scan offload is used (i.e. the hw_scan() callback is 2284 * assigned) this function needs to be called by the driver to notify 2285 * mac80211 that the scan finished. 2286 * 2287 * @hw: the hardware that finished the scan 2288 * @aborted: set to true if scan was aborted 2289 */ 2290void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 2291 2292/** 2293 * ieee80211_iterate_active_interfaces - iterate active interfaces 2294 * 2295 * This function iterates over the interfaces associated with a given 2296 * hardware that are currently active and calls the callback for them. 2297 * This function allows the iterator function to sleep, when the iterator 2298 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 2299 * be used. 2300 * 2301 * @hw: the hardware struct of which the interfaces should be iterated over 2302 * @iterator: the iterator function to call 2303 * @data: first argument of the iterator function 2304 */ 2305void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 2306 void (*iterator)(void *data, u8 *mac, 2307 struct ieee80211_vif *vif), 2308 void *data); 2309 2310/** 2311 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 2312 * 2313 * This function iterates over the interfaces associated with a given 2314 * hardware that are currently active and calls the callback for them. 2315 * This function requires the iterator callback function to be atomic, 2316 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 2317 * 2318 * @hw: the hardware struct of which the interfaces should be iterated over 2319 * @iterator: the iterator function to call, cannot sleep 2320 * @data: first argument of the iterator function 2321 */ 2322void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 2323 void (*iterator)(void *data, 2324 u8 *mac, 2325 struct ieee80211_vif *vif), 2326 void *data); 2327 2328/** 2329 * ieee80211_queue_work - add work onto the mac80211 workqueue 2330 * 2331 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 2332 * This helper ensures drivers are not queueing work when they should not be. 2333 * 2334 * @hw: the hardware struct for the interface we are adding work for 2335 * @work: the work we want to add onto the mac80211 workqueue 2336 */ 2337void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 2338 2339/** 2340 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 2341 * 2342 * Drivers and mac80211 use this to queue delayed work onto the mac80211 2343 * workqueue. 2344 * 2345 * @hw: the hardware struct for the interface we are adding work for 2346 * @dwork: delayable work to queue onto the mac80211 workqueue 2347 * @delay: number of jiffies to wait before queueing 2348 */ 2349void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 2350 struct delayed_work *dwork, 2351 unsigned long delay); 2352 2353/** 2354 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 2355 * @sta: the station for which to start a BA session 2356 * @tid: the TID to BA on. 2357 * 2358 * Return: success if addBA request was sent, failure otherwise 2359 * 2360 * Although mac80211/low level driver/user space application can estimate 2361 * the need to start aggregation on a certain RA/TID, the session level 2362 * will be managed by the mac80211. 2363 */ 2364int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2365 2366/** 2367 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 2368 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2369 * @ra: receiver address of the BA session recipient. 2370 * @tid: the TID to BA on. 2371 * 2372 * This function must be called by low level driver once it has 2373 * finished with preparations for the BA session. It can be called 2374 * from any context. 2375 */ 2376void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2377 u16 tid); 2378 2379/** 2380 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 2381 * @sta: the station whose BA session to stop 2382 * @tid: the TID to stop BA. 2383 * 2384 * Return: negative error if the TID is invalid, or no aggregation active 2385 * 2386 * Although mac80211/low level driver/user space application can estimate 2387 * the need to stop aggregation on a certain RA/TID, the session level 2388 * will be managed by the mac80211. 2389 */ 2390int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2391 2392/** 2393 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 2394 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2395 * @ra: receiver address of the BA session recipient. 2396 * @tid: the desired TID to BA on. 2397 * 2398 * This function must be called by low level driver once it has 2399 * finished with preparations for the BA session tear down. It 2400 * can be called from any context. 2401 */ 2402void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2403 u16 tid); 2404 2405/** 2406 * ieee80211_find_sta - find a station 2407 * 2408 * @vif: virtual interface to look for station on 2409 * @addr: station's address 2410 * 2411 * This function must be called under RCU lock and the 2412 * resulting pointer is only valid under RCU lock as well. 2413 */ 2414struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 2415 const u8 *addr); 2416 2417/** 2418 * ieee80211_find_sta_by_hw - find a station on hardware 2419 * 2420 * @hw: pointer as obtained from ieee80211_alloc_hw() 2421 * @addr: station's address 2422 * 2423 * This function must be called under RCU lock and the 2424 * resulting pointer is only valid under RCU lock as well. 2425 * 2426 * NOTE: This function should not be used! When mac80211 is converted 2427 * internally to properly keep track of stations on multiple 2428 * virtual interfaces, it will not always know which station to 2429 * return here since a single address might be used by multiple 2430 * logical stations (e.g. consider a station connecting to another 2431 * BSSID on the same AP hardware without disconnecting first). 2432 * 2433 * DO NOT USE THIS FUNCTION. 2434 */ 2435struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw, 2436 const u8 *addr); 2437 2438/** 2439 * ieee80211_sta_block_awake - block station from waking up 2440 * @hw: the hardware 2441 * @pubsta: the station 2442 * @block: whether to block or unblock 2443 * 2444 * Some devices require that all frames that are on the queues 2445 * for a specific station that went to sleep are flushed before 2446 * a poll response or frames after the station woke up can be 2447 * delivered to that it. Note that such frames must be rejected 2448 * by the driver as filtered, with the appropriate status flag. 2449 * 2450 * This function allows implementing this mode in a race-free 2451 * manner. 2452 * 2453 * To do this, a driver must keep track of the number of frames 2454 * still enqueued for a specific station. If this number is not 2455 * zero when the station goes to sleep, the driver must call 2456 * this function to force mac80211 to consider the station to 2457 * be asleep regardless of the station's actual state. Once the 2458 * number of outstanding frames reaches zero, the driver must 2459 * call this function again to unblock the station. That will 2460 * cause mac80211 to be able to send ps-poll responses, and if 2461 * the station queried in the meantime then frames will also 2462 * be sent out as a result of this. Additionally, the driver 2463 * will be notified that the station woke up some time after 2464 * it is unblocked, regardless of whether the station actually 2465 * woke up while blocked or not. 2466 */ 2467void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2468 struct ieee80211_sta *pubsta, bool block); 2469 2470/** 2471 * ieee80211_beacon_loss - inform hardware does not receive beacons 2472 * 2473 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2474 * 2475 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTERING and 2476 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 2477 * hardware is not receiving beacons with this function. 2478 */ 2479void ieee80211_beacon_loss(struct ieee80211_vif *vif); 2480 2481/** 2482 * ieee80211_connection_loss - inform hardware has lost connection to the AP 2483 * 2484 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2485 * 2486 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTERING, and 2487 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 2488 * needs to inform if the connection to the AP has been lost. 2489 * 2490 * This function will cause immediate change to disassociated state, 2491 * without connection recovery attempts. 2492 */ 2493void ieee80211_connection_loss(struct ieee80211_vif *vif); 2494 2495/** 2496 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 2497 * 2498 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2499 * 2500 * Some hardware require full power save to manage simultaneous BT traffic 2501 * on the WLAN frequency. Full PSM is required periodically, whenever there are 2502 * burst of BT traffic. The hardware gets information of BT traffic via 2503 * hardware co-existence lines, and consequentially requests mac80211 to 2504 * (temporarily) enter full psm. 2505 * This function will only temporarily disable dynamic PS, not enable PSM if 2506 * it was not already enabled. 2507 * The driver must make sure to re-enable dynamic PS using 2508 * ieee80211_enable_dyn_ps() if the driver has disabled it. 2509 * 2510 */ 2511void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 2512 2513/** 2514 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 2515 * 2516 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2517 * 2518 * This function restores dynamic PS after being temporarily disabled via 2519 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 2520 * be coupled with an eventual call to this function. 2521 * 2522 */ 2523void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 2524 2525/** 2526 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 2527 * rssi threshold triggered 2528 * 2529 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2530 * @rssi_event: the RSSI trigger event type 2531 * @gfp: context flags 2532 * 2533 * When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality 2534 * monitoring is configured with an rssi threshold, the driver will inform 2535 * whenever the rssi level reaches the threshold. 2536 */ 2537void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 2538 enum nl80211_cqm_rssi_threshold_event rssi_event, 2539 gfp_t gfp); 2540 2541/** 2542 * ieee80211_chswitch_done - Complete channel switch process 2543 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2544 * @success: make the channel switch successful or not 2545 * 2546 * Complete the channel switch post-process: set the new operational channel 2547 * and wake up the suspended queues. 2548 */ 2549void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 2550 2551/** 2552 * ieee80211_request_smps - request SM PS transition 2553 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2554 * @mode: new SM PS mode 2555 * 2556 * This allows the driver to request an SM PS transition in managed 2557 * mode. This is useful when the driver has more information than 2558 * the stack about possible interference, for example by bluetooth. 2559 */ 2560void ieee80211_request_smps(struct ieee80211_vif *vif, 2561 enum ieee80211_smps_mode smps_mode); 2562 2563/* Rate control API */ 2564 2565/** 2566 * enum rate_control_changed - flags to indicate which parameter changed 2567 * 2568 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 2569 * changed, rate control algorithm can update its internal state if needed. 2570 */ 2571enum rate_control_changed { 2572 IEEE80211_RC_HT_CHANGED = BIT(0) 2573}; 2574 2575/** 2576 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 2577 * 2578 * @hw: The hardware the algorithm is invoked for. 2579 * @sband: The band this frame is being transmitted on. 2580 * @bss_conf: the current BSS configuration 2581 * @reported_rate: The rate control algorithm can fill this in to indicate 2582 * which rate should be reported to userspace as the current rate and 2583 * used for rate calculations in the mesh network. 2584 * @rts: whether RTS will be used for this frame because it is longer than the 2585 * RTS threshold 2586 * @short_preamble: whether mac80211 will request short-preamble transmission 2587 * if the selected rate supports it 2588 * @max_rate_idx: user-requested maximum rate (not MCS for now) 2589 * (deprecated; this will be removed once drivers get updated to use 2590 * rate_idx_mask) 2591 * @rate_idx_mask: user-requested rate mask (not MCS for now) 2592 * @skb: the skb that will be transmitted, the control information in it needs 2593 * to be filled in 2594 * @ap: whether this frame is sent out in AP mode 2595 */ 2596struct ieee80211_tx_rate_control { 2597 struct ieee80211_hw *hw; 2598 struct ieee80211_supported_band *sband; 2599 struct ieee80211_bss_conf *bss_conf; 2600 struct sk_buff *skb; 2601 struct ieee80211_tx_rate reported_rate; 2602 bool rts, short_preamble; 2603 u8 max_rate_idx; 2604 u32 rate_idx_mask; 2605 bool ap; 2606}; 2607 2608struct rate_control_ops { 2609 struct module *module; 2610 const char *name; 2611 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 2612 void (*free)(void *priv); 2613 2614 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 2615 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 2616 struct ieee80211_sta *sta, void *priv_sta); 2617 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 2618 struct ieee80211_sta *sta, 2619 void *priv_sta, u32 changed, 2620 enum nl80211_channel_type oper_chan_type); 2621 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 2622 void *priv_sta); 2623 2624 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 2625 struct ieee80211_sta *sta, void *priv_sta, 2626 struct sk_buff *skb); 2627 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 2628 struct ieee80211_tx_rate_control *txrc); 2629 2630 void (*add_sta_debugfs)(void *priv, void *priv_sta, 2631 struct dentry *dir); 2632 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 2633}; 2634 2635static inline int rate_supported(struct ieee80211_sta *sta, 2636 enum ieee80211_band band, 2637 int index) 2638{ 2639 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 2640} 2641 2642/** 2643 * rate_control_send_low - helper for drivers for management/no-ack frames 2644 * 2645 * Rate control algorithms that agree to use the lowest rate to 2646 * send management frames and NO_ACK data with the respective hw 2647 * retries should use this in the beginning of their mac80211 get_rate 2648 * callback. If true is returned the rate control can simply return. 2649 * If false is returned we guarantee that sta and sta and priv_sta is 2650 * not null. 2651 * 2652 * Rate control algorithms wishing to do more intelligent selection of 2653 * rate for multicast/broadcast frames may choose to not use this. 2654 * 2655 * @sta: &struct ieee80211_sta pointer to the target destination. Note 2656 * that this may be null. 2657 * @priv_sta: private rate control structure. This may be null. 2658 * @txrc: rate control information we sholud populate for mac80211. 2659 */ 2660bool rate_control_send_low(struct ieee80211_sta *sta, 2661 void *priv_sta, 2662 struct ieee80211_tx_rate_control *txrc); 2663 2664 2665static inline s8 2666rate_lowest_index(struct ieee80211_supported_band *sband, 2667 struct ieee80211_sta *sta) 2668{ 2669 int i; 2670 2671 for (i = 0; i < sband->n_bitrates; i++) 2672 if (rate_supported(sta, sband->band, i)) 2673 return i; 2674 2675 /* warn when we cannot find a rate. */ 2676 WARN_ON(1); 2677 2678 return 0; 2679} 2680 2681static inline 2682bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 2683 struct ieee80211_sta *sta) 2684{ 2685 unsigned int i; 2686 2687 for (i = 0; i < sband->n_bitrates; i++) 2688 if (rate_supported(sta, sband->band, i)) 2689 return true; 2690 return false; 2691} 2692 2693int ieee80211_rate_control_register(struct rate_control_ops *ops); 2694void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 2695 2696static inline bool 2697conf_is_ht20(struct ieee80211_conf *conf) 2698{ 2699 return conf->channel_type == NL80211_CHAN_HT20; 2700} 2701 2702static inline bool 2703conf_is_ht40_minus(struct ieee80211_conf *conf) 2704{ 2705 return conf->channel_type == NL80211_CHAN_HT40MINUS; 2706} 2707 2708static inline bool 2709conf_is_ht40_plus(struct ieee80211_conf *conf) 2710{ 2711 return conf->channel_type == NL80211_CHAN_HT40PLUS; 2712} 2713 2714static inline bool 2715conf_is_ht40(struct ieee80211_conf *conf) 2716{ 2717 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 2718} 2719 2720static inline bool 2721conf_is_ht(struct ieee80211_conf *conf) 2722{ 2723 return conf->channel_type != NL80211_CHAN_NO_HT; 2724} 2725 2726#endif /* MAC80211_H */ 2727