mac80211.h revision 8789d459bc5e837bf37d261453df96ef54018d7b
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_flags - key flags 793 * 794 * These flags are used for communication about keys between the driver 795 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 796 * 797 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 798 * that the STA this key will be used with could be using QoS. 799 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 800 * driver to indicate that it requires IV generation for this 801 * particular key. 802 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 803 * the driver for a TKIP key if it requires Michael MIC 804 * generation in software. 805 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 806 * that the key is pairwise rather then a shared key. 807 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 808 * CCMP key if it requires CCMP encryption of management frames (MFP) to 809 * be done in software. 810 */ 811enum ieee80211_key_flags { 812 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 813 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 814 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 815 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 816 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 817}; 818 819/** 820 * struct ieee80211_key_conf - key information 821 * 822 * This key information is given by mac80211 to the driver by 823 * the set_key() callback in &struct ieee80211_ops. 824 * 825 * @hw_key_idx: To be set by the driver, this is the key index the driver 826 * wants to be given when a frame is transmitted and needs to be 827 * encrypted in hardware. 828 * @cipher: The key's cipher suite selector. 829 * @flags: key flags, see &enum ieee80211_key_flags. 830 * @keyidx: the key index (0-3) 831 * @keylen: key material length 832 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 833 * data block: 834 * - Temporal Encryption Key (128 bits) 835 * - Temporal Authenticator Tx MIC Key (64 bits) 836 * - Temporal Authenticator Rx MIC Key (64 bits) 837 * @icv_len: The ICV length for this key type 838 * @iv_len: The IV length for this key type 839 */ 840struct ieee80211_key_conf { 841 u32 cipher; 842 u8 icv_len; 843 u8 iv_len; 844 u8 hw_key_idx; 845 u8 flags; 846 s8 keyidx; 847 u8 keylen; 848 u8 key[0]; 849}; 850 851/** 852 * enum set_key_cmd - key command 853 * 854 * Used with the set_key() callback in &struct ieee80211_ops, this 855 * indicates whether a key is being removed or added. 856 * 857 * @SET_KEY: a key is set 858 * @DISABLE_KEY: a key must be disabled 859 */ 860enum set_key_cmd { 861 SET_KEY, DISABLE_KEY, 862}; 863 864/** 865 * struct ieee80211_sta - station table entry 866 * 867 * A station table entry represents a station we are possibly 868 * communicating with. Since stations are RCU-managed in 869 * mac80211, any ieee80211_sta pointer you get access to must 870 * either be protected by rcu_read_lock() explicitly or implicitly, 871 * or you must take good care to not use such a pointer after a 872 * call to your sta_remove callback that removed it. 873 * 874 * @addr: MAC address 875 * @aid: AID we assigned to the station if we're an AP 876 * @supp_rates: Bitmap of supported rates (per band) 877 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 878 * @drv_priv: data area for driver use, will always be aligned to 879 * sizeof(void *), size is determined in hw information. 880 */ 881struct ieee80211_sta { 882 u32 supp_rates[IEEE80211_NUM_BANDS]; 883 u8 addr[ETH_ALEN]; 884 u16 aid; 885 struct ieee80211_sta_ht_cap ht_cap; 886 887 /* must be last */ 888 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 889}; 890 891/** 892 * enum sta_notify_cmd - sta notify command 893 * 894 * Used with the sta_notify() callback in &struct ieee80211_ops, this 895 * indicates if an associated station made a power state transition. 896 * 897 * @STA_NOTIFY_SLEEP: a station is now sleeping 898 * @STA_NOTIFY_AWAKE: a sleeping station woke up 899 */ 900enum sta_notify_cmd { 901 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 902}; 903 904/** 905 * enum ieee80211_tkip_key_type - get tkip key 906 * 907 * Used by drivers which need to get a tkip key for skb. Some drivers need a 908 * phase 1 key, others need a phase 2 key. A single function allows the driver 909 * to get the key, this enum indicates what type of key is required. 910 * 911 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 912 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 913 */ 914enum ieee80211_tkip_key_type { 915 IEEE80211_TKIP_P1_KEY, 916 IEEE80211_TKIP_P2_KEY, 917}; 918 919/** 920 * enum ieee80211_hw_flags - hardware flags 921 * 922 * These flags are used to indicate hardware capabilities to 923 * the stack. Generally, flags here should have their meaning 924 * done in a way that the simplest hardware doesn't need setting 925 * any particular flags. There are some exceptions to this rule, 926 * however, so you are advised to review these flags carefully. 927 * 928 * @IEEE80211_HW_HAS_RATE_CONTROL: 929 * The hardware or firmware includes rate control, and cannot be 930 * controlled by the stack. As such, no rate control algorithm 931 * should be instantiated, and the TX rate reported to userspace 932 * will be taken from the TX status instead of the rate control 933 * algorithm. 934 * Note that this requires that the driver implement a number of 935 * callbacks so it has the correct information, it needs to have 936 * the @set_rts_threshold callback and must look at the BSS config 937 * @use_cts_prot for G/N protection, @use_short_slot for slot 938 * timing in 2.4 GHz and @use_short_preamble for preambles for 939 * CCK frames. 940 * 941 * @IEEE80211_HW_RX_INCLUDES_FCS: 942 * Indicates that received frames passed to the stack include 943 * the FCS at the end. 944 * 945 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 946 * Some wireless LAN chipsets buffer broadcast/multicast frames 947 * for power saving stations in the hardware/firmware and others 948 * rely on the host system for such buffering. This option is used 949 * to configure the IEEE 802.11 upper layer to buffer broadcast and 950 * multicast frames when there are power saving stations so that 951 * the driver can fetch them with ieee80211_get_buffered_bc(). 952 * 953 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 954 * Hardware is not capable of short slot operation on the 2.4 GHz band. 955 * 956 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 957 * Hardware is not capable of receiving frames with short preamble on 958 * the 2.4 GHz band. 959 * 960 * @IEEE80211_HW_SIGNAL_UNSPEC: 961 * Hardware can provide signal values but we don't know its units. We 962 * expect values between 0 and @max_signal. 963 * If possible please provide dB or dBm instead. 964 * 965 * @IEEE80211_HW_SIGNAL_DBM: 966 * Hardware gives signal values in dBm, decibel difference from 967 * one milliwatt. This is the preferred method since it is standardized 968 * between different devices. @max_signal does not need to be set. 969 * 970 * @IEEE80211_HW_SPECTRUM_MGMT: 971 * Hardware supports spectrum management defined in 802.11h 972 * Measurement, Channel Switch, Quieting, TPC 973 * 974 * @IEEE80211_HW_AMPDU_AGGREGATION: 975 * Hardware supports 11n A-MPDU aggregation. 976 * 977 * @IEEE80211_HW_SUPPORTS_PS: 978 * Hardware has power save support (i.e. can go to sleep). 979 * 980 * @IEEE80211_HW_PS_NULLFUNC_STACK: 981 * Hardware requires nullfunc frame handling in stack, implies 982 * stack support for dynamic PS. 983 * 984 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 985 * Hardware has support for dynamic PS. 986 * 987 * @IEEE80211_HW_MFP_CAPABLE: 988 * Hardware supports management frame protection (MFP, IEEE 802.11w). 989 * 990 * @IEEE80211_HW_BEACON_FILTER: 991 * Hardware supports dropping of irrelevant beacon frames to 992 * avoid waking up cpu. 993 * 994 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 995 * Hardware supports static spatial multiplexing powersave, 996 * ie. can turn off all but one chain even on HT connections 997 * that should be using more chains. 998 * 999 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1000 * Hardware supports dynamic spatial multiplexing powersave, 1001 * ie. can turn off all but one chain and then wake the rest 1002 * up as required after, for example, rts/cts handshake. 1003 * 1004 * @IEEE80211_HW_SUPPORTS_UAPSD: 1005 * Hardware supports Unscheduled Automatic Power Save Delivery 1006 * (U-APSD) in managed mode. The mode is configured with 1007 * conf_tx() operation. 1008 * 1009 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1010 * Hardware can provide ack status reports of Tx frames to 1011 * the stack. 1012 * 1013 * @IEEE80211_HW_CONNECTION_MONITOR: 1014 * The hardware performs its own connection monitoring, including 1015 * periodic keep-alives to the AP and probing the AP on beacon loss. 1016 * When this flag is set, signaling beacon-loss will cause an immediate 1017 * change to disassociated state. 1018 * 1019 * @IEEE80211_HW_SUPPORTS_CQM_RSSI: 1020 * Hardware can do connection quality monitoring - i.e. it can monitor 1021 * connection quality related parameters, such as the RSSI level and 1022 * provide notifications if configured trigger levels are reached. 1023 * 1024 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1025 * This device needs to know the DTIM period for the BSS before 1026 * associating. 1027 */ 1028enum ieee80211_hw_flags { 1029 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1030 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1031 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1032 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1033 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1034 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1035 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1036 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1037 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1038 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1039 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1040 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1041 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1042 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1043 IEEE80211_HW_BEACON_FILTER = 1<<14, 1044 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1045 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1046 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1047 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1048 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1049 IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20, 1050}; 1051 1052/** 1053 * struct ieee80211_hw - hardware information and state 1054 * 1055 * This structure contains the configuration and hardware 1056 * information for an 802.11 PHY. 1057 * 1058 * @wiphy: This points to the &struct wiphy allocated for this 1059 * 802.11 PHY. You must fill in the @perm_addr and @dev 1060 * members of this structure using SET_IEEE80211_DEV() 1061 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1062 * bands (with channels, bitrates) are registered here. 1063 * 1064 * @conf: &struct ieee80211_conf, device configuration, don't use. 1065 * 1066 * @priv: pointer to private area that was allocated for driver use 1067 * along with this structure. 1068 * 1069 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1070 * 1071 * @extra_tx_headroom: headroom to reserve in each transmit skb 1072 * for use by the driver (e.g. for transmit headers.) 1073 * 1074 * @channel_change_time: time (in microseconds) it takes to change channels. 1075 * 1076 * @max_signal: Maximum value for signal (rssi) in RX information, used 1077 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1078 * 1079 * @max_listen_interval: max listen interval in units of beacon interval 1080 * that HW supports 1081 * 1082 * @queues: number of available hardware transmit queues for 1083 * data packets. WMM/QoS requires at least four, these 1084 * queues need to have configurable access parameters. 1085 * 1086 * @rate_control_algorithm: rate control algorithm for this hardware. 1087 * If unset (NULL), the default algorithm will be used. Must be 1088 * set before calling ieee80211_register_hw(). 1089 * 1090 * @vif_data_size: size (in bytes) of the drv_priv data area 1091 * within &struct ieee80211_vif. 1092 * @sta_data_size: size (in bytes) of the drv_priv data area 1093 * within &struct ieee80211_sta. 1094 * 1095 * @max_rates: maximum number of alternate rate retry stages 1096 * @max_rate_tries: maximum number of tries for each stage 1097 * 1098 * @napi_weight: weight used for NAPI polling. You must specify an 1099 * appropriate value here if a napi_poll operation is provided 1100 * by your driver. 1101 */ 1102struct ieee80211_hw { 1103 struct ieee80211_conf conf; 1104 struct wiphy *wiphy; 1105 const char *rate_control_algorithm; 1106 void *priv; 1107 u32 flags; 1108 unsigned int extra_tx_headroom; 1109 int channel_change_time; 1110 int vif_data_size; 1111 int sta_data_size; 1112 int napi_weight; 1113 u16 queues; 1114 u16 max_listen_interval; 1115 s8 max_signal; 1116 u8 max_rates; 1117 u8 max_rate_tries; 1118}; 1119 1120/** 1121 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1122 * 1123 * @wiphy: the &struct wiphy which we want to query 1124 * 1125 * mac80211 drivers can use this to get to their respective 1126 * &struct ieee80211_hw. Drivers wishing to get to their own private 1127 * structure can then access it via hw->priv. Note that mac802111 drivers should 1128 * not use wiphy_priv() to try to get their private driver structure as this 1129 * is already used internally by mac80211. 1130 */ 1131struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1132 1133/** 1134 * SET_IEEE80211_DEV - set device for 802.11 hardware 1135 * 1136 * @hw: the &struct ieee80211_hw to set the device for 1137 * @dev: the &struct device of this 802.11 device 1138 */ 1139static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1140{ 1141 set_wiphy_dev(hw->wiphy, dev); 1142} 1143 1144/** 1145 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1146 * 1147 * @hw: the &struct ieee80211_hw to set the MAC address for 1148 * @addr: the address to set 1149 */ 1150static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1151{ 1152 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1153} 1154 1155static inline struct ieee80211_rate * 1156ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1157 const struct ieee80211_tx_info *c) 1158{ 1159 if (WARN_ON(c->control.rates[0].idx < 0)) 1160 return NULL; 1161 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1162} 1163 1164static inline struct ieee80211_rate * 1165ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1166 const struct ieee80211_tx_info *c) 1167{ 1168 if (c->control.rts_cts_rate_idx < 0) 1169 return NULL; 1170 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1171} 1172 1173static inline struct ieee80211_rate * 1174ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1175 const struct ieee80211_tx_info *c, int idx) 1176{ 1177 if (c->control.rates[idx + 1].idx < 0) 1178 return NULL; 1179 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1180} 1181 1182/** 1183 * DOC: Hardware crypto acceleration 1184 * 1185 * mac80211 is capable of taking advantage of many hardware 1186 * acceleration designs for encryption and decryption operations. 1187 * 1188 * The set_key() callback in the &struct ieee80211_ops for a given 1189 * device is called to enable hardware acceleration of encryption and 1190 * decryption. The callback takes a @sta parameter that will be NULL 1191 * for default keys or keys used for transmission only, or point to 1192 * the station information for the peer for individual keys. 1193 * Multiple transmission keys with the same key index may be used when 1194 * VLANs are configured for an access point. 1195 * 1196 * When transmitting, the TX control data will use the @hw_key_idx 1197 * selected by the driver by modifying the &struct ieee80211_key_conf 1198 * pointed to by the @key parameter to the set_key() function. 1199 * 1200 * The set_key() call for the %SET_KEY command should return 0 if 1201 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1202 * added; if you return 0 then hw_key_idx must be assigned to the 1203 * hardware key index, you are free to use the full u8 range. 1204 * 1205 * When the cmd is %DISABLE_KEY then it must succeed. 1206 * 1207 * Note that it is permissible to not decrypt a frame even if a key 1208 * for it has been uploaded to hardware, the stack will not make any 1209 * decision based on whether a key has been uploaded or not but rather 1210 * based on the receive flags. 1211 * 1212 * The &struct ieee80211_key_conf structure pointed to by the @key 1213 * parameter is guaranteed to be valid until another call to set_key() 1214 * removes it, but it can only be used as a cookie to differentiate 1215 * keys. 1216 * 1217 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1218 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1219 * handler. 1220 * The update_tkip_key() call updates the driver with the new phase 1 key. 1221 * This happens everytime the iv16 wraps around (every 65536 packets). The 1222 * set_key() call will happen only once for each key (unless the AP did 1223 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1224 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1225 * handler is software decryption with wrap around of iv16. 1226 */ 1227 1228/** 1229 * DOC: Powersave support 1230 * 1231 * mac80211 has support for various powersave implementations. 1232 * 1233 * First, it can support hardware that handles all powersaving by itself, 1234 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1235 * flag. In that case, it will be told about the desired powersave mode 1236 * with the %IEEE80211_CONF_PS flag depending on the association status. 1237 * The hardware must take care of sending nullfunc frames when necessary, 1238 * i.e. when entering and leaving powersave mode. The hardware is required 1239 * to look at the AID in beacons and signal to the AP that it woke up when 1240 * it finds traffic directed to it. 1241 * 1242 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1243 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1244 * with hardware wakeup and sleep states. Driver is responsible for waking 1245 * up the hardware before issuing commands to the hardware and putting it 1246 * back to sleep at appropriate times. 1247 * 1248 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1249 * buffered multicast/broadcast frames after the beacon. Also it must be 1250 * possible to send frames and receive the acknowledment frame. 1251 * 1252 * Other hardware designs cannot send nullfunc frames by themselves and also 1253 * need software support for parsing the TIM bitmap. This is also supported 1254 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1255 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1256 * required to pass up beacons. The hardware is still required to handle 1257 * waking up for multicast traffic; if it cannot the driver must handle that 1258 * as best as it can, mac80211 is too slow to do that. 1259 * 1260 * Dynamic powersave is an extension to normal powersave in which the 1261 * hardware stays awake for a user-specified period of time after sending a 1262 * frame so that reply frames need not be buffered and therefore delayed to 1263 * the next wakeup. It's compromise of getting good enough latency when 1264 * there's data traffic and still saving significantly power in idle 1265 * periods. 1266 * 1267 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1268 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1269 * flag and mac80211 will handle everything automatically. Additionally, 1270 * hardware having support for the dynamic PS feature may set the 1271 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1272 * dynamic PS mode itself. The driver needs to look at the 1273 * @dynamic_ps_timeout hardware configuration value and use it that value 1274 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1275 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1276 * enabled whenever user has enabled powersave. 1277 * 1278 * Some hardware need to toggle a single shared antenna between WLAN and 1279 * Bluetooth to facilitate co-existence. These types of hardware set 1280 * limitations on the use of host controlled dynamic powersave whenever there 1281 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1282 * driver may request temporarily going into full power save, in order to 1283 * enable toggling the antenna between BT and WLAN. If the driver requests 1284 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1285 * temporarily set to zero until the driver re-enables dynamic powersave. 1286 * 1287 * Driver informs U-APSD client support by enabling 1288 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1289 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1290 * Nullfunc frames and stay awake until the service period has ended. To 1291 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1292 * from that AC are transmitted with powersave enabled. 1293 * 1294 * Note: U-APSD client mode is not yet supported with 1295 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1296 */ 1297 1298/** 1299 * DOC: Beacon filter support 1300 * 1301 * Some hardware have beacon filter support to reduce host cpu wakeups 1302 * which will reduce system power consumption. It usuallly works so that 1303 * the firmware creates a checksum of the beacon but omits all constantly 1304 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1305 * beacon is forwarded to the host, otherwise it will be just dropped. That 1306 * way the host will only receive beacons where some relevant information 1307 * (for example ERP protection or WMM settings) have changed. 1308 * 1309 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER 1310 * hardware capability. The driver needs to enable beacon filter support 1311 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1312 * power save is enabled, the stack will not check for beacon loss and the 1313 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1314 * 1315 * The time (or number of beacons missed) until the firmware notifies the 1316 * driver of a beacon loss event (which in turn causes the driver to call 1317 * ieee80211_beacon_loss()) should be configurable and will be controlled 1318 * by mac80211 and the roaming algorithm in the future. 1319 * 1320 * Since there may be constantly changing information elements that nothing 1321 * in the software stack cares about, we will, in the future, have mac80211 1322 * tell the driver which information elements are interesting in the sense 1323 * that we want to see changes in them. This will include 1324 * - a list of information element IDs 1325 * - a list of OUIs for the vendor information element 1326 * 1327 * Ideally, the hardware would filter out any beacons without changes in the 1328 * requested elements, but if it cannot support that it may, at the expense 1329 * of some efficiency, filter out only a subset. For example, if the device 1330 * doesn't support checking for OUIs it should pass up all changes in all 1331 * vendor information elements. 1332 * 1333 * Note that change, for the sake of simplification, also includes information 1334 * elements appearing or disappearing from the beacon. 1335 * 1336 * Some hardware supports an "ignore list" instead, just make sure nothing 1337 * that was requested is on the ignore list, and include commonly changing 1338 * information element IDs in the ignore list, for example 11 (BSS load) and 1339 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1340 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1341 * it could also include some currently unused IDs. 1342 * 1343 * 1344 * In addition to these capabilities, hardware should support notifying the 1345 * host of changes in the beacon RSSI. This is relevant to implement roaming 1346 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1347 * the received data packets). This can consist in notifying the host when 1348 * the RSSI changes significantly or when it drops below or rises above 1349 * configurable thresholds. In the future these thresholds will also be 1350 * configured by mac80211 (which gets them from userspace) to implement 1351 * them as the roaming algorithm requires. 1352 * 1353 * If the hardware cannot implement this, the driver should ask it to 1354 * periodically pass beacon frames to the host so that software can do the 1355 * signal strength threshold checking. 1356 */ 1357 1358/** 1359 * DOC: Spatial multiplexing power save 1360 * 1361 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1362 * power in an 802.11n implementation. For details on the mechanism 1363 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1364 * "11.2.3 SM power save". 1365 * 1366 * The mac80211 implementation is capable of sending action frames 1367 * to update the AP about the station's SMPS mode, and will instruct 1368 * the driver to enter the specific mode. It will also announce the 1369 * requested SMPS mode during the association handshake. Hardware 1370 * support for this feature is required, and can be indicated by 1371 * hardware flags. 1372 * 1373 * The default mode will be "automatic", which nl80211/cfg80211 1374 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1375 * turned off otherwise. 1376 * 1377 * To support this feature, the driver must set the appropriate 1378 * hardware support flags, and handle the SMPS flag to the config() 1379 * operation. It will then with this mechanism be instructed to 1380 * enter the requested SMPS mode while associated to an HT AP. 1381 */ 1382 1383/** 1384 * DOC: Frame filtering 1385 * 1386 * mac80211 requires to see many management frames for proper 1387 * operation, and users may want to see many more frames when 1388 * in monitor mode. However, for best CPU usage and power consumption, 1389 * having as few frames as possible percolate through the stack is 1390 * desirable. Hence, the hardware should filter as much as possible. 1391 * 1392 * To achieve this, mac80211 uses filter flags (see below) to tell 1393 * the driver's configure_filter() function which frames should be 1394 * passed to mac80211 and which should be filtered out. 1395 * 1396 * Before configure_filter() is invoked, the prepare_multicast() 1397 * callback is invoked with the parameters @mc_count and @mc_list 1398 * for the combined multicast address list of all virtual interfaces. 1399 * It's use is optional, and it returns a u64 that is passed to 1400 * configure_filter(). Additionally, configure_filter() has the 1401 * arguments @changed_flags telling which flags were changed and 1402 * @total_flags with the new flag states. 1403 * 1404 * If your device has no multicast address filters your driver will 1405 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1406 * parameter to see whether multicast frames should be accepted 1407 * or dropped. 1408 * 1409 * All unsupported flags in @total_flags must be cleared. 1410 * Hardware does not support a flag if it is incapable of _passing_ 1411 * the frame to the stack. Otherwise the driver must ignore 1412 * the flag, but not clear it. 1413 * You must _only_ clear the flag (announce no support for the 1414 * flag to mac80211) if you are not able to pass the packet type 1415 * to the stack (so the hardware always filters it). 1416 * So for example, you should clear @FIF_CONTROL, if your hardware 1417 * always filters control frames. If your hardware always passes 1418 * control frames to the kernel and is incapable of filtering them, 1419 * you do _not_ clear the @FIF_CONTROL flag. 1420 * This rule applies to all other FIF flags as well. 1421 */ 1422 1423/** 1424 * enum ieee80211_filter_flags - hardware filter flags 1425 * 1426 * These flags determine what the filter in hardware should be 1427 * programmed to let through and what should not be passed to the 1428 * stack. It is always safe to pass more frames than requested, 1429 * but this has negative impact on power consumption. 1430 * 1431 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1432 * think of the BSS as your network segment and then this corresponds 1433 * to the regular ethernet device promiscuous mode. 1434 * 1435 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1436 * by the user or if the hardware is not capable of filtering by 1437 * multicast address. 1438 * 1439 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1440 * %RX_FLAG_FAILED_FCS_CRC for them) 1441 * 1442 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1443 * the %RX_FLAG_FAILED_PLCP_CRC for them 1444 * 1445 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1446 * to the hardware that it should not filter beacons or probe responses 1447 * by BSSID. Filtering them can greatly reduce the amount of processing 1448 * mac80211 needs to do and the amount of CPU wakeups, so you should 1449 * honour this flag if possible. 1450 * 1451 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1452 * is not set then only those addressed to this station. 1453 * 1454 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1455 * 1456 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1457 * those addressed to this station. 1458 */ 1459enum ieee80211_filter_flags { 1460 FIF_PROMISC_IN_BSS = 1<<0, 1461 FIF_ALLMULTI = 1<<1, 1462 FIF_FCSFAIL = 1<<2, 1463 FIF_PLCPFAIL = 1<<3, 1464 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1465 FIF_CONTROL = 1<<5, 1466 FIF_OTHER_BSS = 1<<6, 1467 FIF_PSPOLL = 1<<7, 1468}; 1469 1470/** 1471 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1472 * 1473 * These flags are used with the ampdu_action() callback in 1474 * &struct ieee80211_ops to indicate which action is needed. 1475 * 1476 * Note that drivers MUST be able to deal with a TX aggregation 1477 * session being stopped even before they OK'ed starting it by 1478 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1479 * might receive the addBA frame and send a delBA right away! 1480 * 1481 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1482 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1483 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1484 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1485 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1486 */ 1487enum ieee80211_ampdu_mlme_action { 1488 IEEE80211_AMPDU_RX_START, 1489 IEEE80211_AMPDU_RX_STOP, 1490 IEEE80211_AMPDU_TX_START, 1491 IEEE80211_AMPDU_TX_STOP, 1492 IEEE80211_AMPDU_TX_OPERATIONAL, 1493}; 1494 1495/** 1496 * struct ieee80211_ops - callbacks from mac80211 to the driver 1497 * 1498 * This structure contains various callbacks that the driver may 1499 * handle or, in some cases, must handle, for example to configure 1500 * the hardware to a new channel or to transmit a frame. 1501 * 1502 * @tx: Handler that 802.11 module calls for each transmitted frame. 1503 * skb contains the buffer starting from the IEEE 802.11 header. 1504 * The low-level driver should send the frame out based on 1505 * configuration in the TX control data. This handler should, 1506 * preferably, never fail and stop queues appropriately, more 1507 * importantly, however, it must never fail for A-MPDU-queues. 1508 * This function should return NETDEV_TX_OK except in very 1509 * limited cases. 1510 * Must be implemented and atomic. 1511 * 1512 * @start: Called before the first netdevice attached to the hardware 1513 * is enabled. This should turn on the hardware and must turn on 1514 * frame reception (for possibly enabled monitor interfaces.) 1515 * Returns negative error codes, these may be seen in userspace, 1516 * or zero. 1517 * When the device is started it should not have a MAC address 1518 * to avoid acknowledging frames before a non-monitor device 1519 * is added. 1520 * Must be implemented and can sleep. 1521 * 1522 * @stop: Called after last netdevice attached to the hardware 1523 * is disabled. This should turn off the hardware (at least 1524 * it must turn off frame reception.) 1525 * May be called right after add_interface if that rejects 1526 * an interface. If you added any work onto the mac80211 workqueue 1527 * you should ensure to cancel it on this callback. 1528 * Must be implemented and can sleep. 1529 * 1530 * @add_interface: Called when a netdevice attached to the hardware is 1531 * enabled. Because it is not called for monitor mode devices, @start 1532 * and @stop must be implemented. 1533 * The driver should perform any initialization it needs before 1534 * the device can be enabled. The initial configuration for the 1535 * interface is given in the conf parameter. 1536 * The callback may refuse to add an interface by returning a 1537 * negative error code (which will be seen in userspace.) 1538 * Must be implemented and can sleep. 1539 * 1540 * @remove_interface: Notifies a driver that an interface is going down. 1541 * The @stop callback is called after this if it is the last interface 1542 * and no monitor interfaces are present. 1543 * When all interfaces are removed, the MAC address in the hardware 1544 * must be cleared so the device no longer acknowledges packets, 1545 * the mac_addr member of the conf structure is, however, set to the 1546 * MAC address of the device going away. 1547 * Hence, this callback must be implemented. It can sleep. 1548 * 1549 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1550 * function to change hardware configuration, e.g., channel. 1551 * This function should never fail but returns a negative error code 1552 * if it does. The callback can sleep. 1553 * 1554 * @bss_info_changed: Handler for configuration requests related to BSS 1555 * parameters that may vary during BSS's lifespan, and may affect low 1556 * level driver (e.g. assoc/disassoc status, erp parameters). 1557 * This function should not be used if no BSS has been set, unless 1558 * for association indication. The @changed parameter indicates which 1559 * of the bss parameters has changed when a call is made. The callback 1560 * can sleep. 1561 * 1562 * @prepare_multicast: Prepare for multicast filter configuration. 1563 * This callback is optional, and its return value is passed 1564 * to configure_filter(). This callback must be atomic. 1565 * 1566 * @configure_filter: Configure the device's RX filter. 1567 * See the section "Frame filtering" for more information. 1568 * This callback must be implemented and can sleep. 1569 * 1570 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1571 * must be set or cleared for a given STA. Must be atomic. 1572 * 1573 * @set_key: See the section "Hardware crypto acceleration" 1574 * This callback is only called between add_interface and 1575 * remove_interface calls, i.e. while the given virtual interface 1576 * is enabled. 1577 * Returns a negative error code if the key can't be added. 1578 * The callback can sleep. 1579 * 1580 * @update_tkip_key: See the section "Hardware crypto acceleration" 1581 * This callback will be called in the context of Rx. Called for drivers 1582 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1583 * The callback must be atomic. 1584 * 1585 * @hw_scan: Ask the hardware to service the scan request, no need to start 1586 * the scan state machine in stack. The scan must honour the channel 1587 * configuration done by the regulatory agent in the wiphy's 1588 * registered bands. The hardware (or the driver) needs to make sure 1589 * that power save is disabled. 1590 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1591 * entire IEs after the SSID, so that drivers need not look at these 1592 * at all but just send them after the SSID -- mac80211 includes the 1593 * (extended) supported rates and HT information (where applicable). 1594 * When the scan finishes, ieee80211_scan_completed() must be called; 1595 * note that it also must be called when the scan cannot finish due to 1596 * any error unless this callback returned a negative error code. 1597 * The callback can sleep. 1598 * 1599 * @sw_scan_start: Notifier function that is called just before a software scan 1600 * is started. Can be NULL, if the driver doesn't need this notification. 1601 * The callback can sleep. 1602 * 1603 * @sw_scan_complete: Notifier function that is called just after a 1604 * software scan finished. Can be NULL, if the driver doesn't need 1605 * this notification. 1606 * The callback can sleep. 1607 * 1608 * @get_stats: Return low-level statistics. 1609 * Returns zero if statistics are available. 1610 * The callback can sleep. 1611 * 1612 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1613 * callback should be provided to read the TKIP transmit IVs (both IV32 1614 * and IV16) for the given key from hardware. 1615 * The callback must be atomic. 1616 * 1617 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1618 * The callback can sleep. 1619 * 1620 * @sta_add: Notifies low level driver about addition of an associated station, 1621 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1622 * 1623 * @sta_remove: Notifies low level driver about removal of an associated 1624 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1625 * 1626 * @sta_notify: Notifies low level driver about power state transition of an 1627 * associated station, AP, IBSS/WDS/mesh peer etc. Must be atomic. 1628 * 1629 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1630 * bursting) for a hardware TX queue. 1631 * Returns a negative error code on failure. 1632 * The callback can sleep. 1633 * 1634 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1635 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1636 * required function. 1637 * The callback can sleep. 1638 * 1639 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1640 * Currently, this is only used for IBSS mode debugging. Is not a 1641 * required function. 1642 * The callback can sleep. 1643 * 1644 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1645 * with other STAs in the IBSS. This is only used in IBSS mode. This 1646 * function is optional if the firmware/hardware takes full care of 1647 * TSF synchronization. 1648 * The callback can sleep. 1649 * 1650 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1651 * This is needed only for IBSS mode and the result of this function is 1652 * used to determine whether to reply to Probe Requests. 1653 * Returns non-zero if this device sent the last beacon. 1654 * The callback can sleep. 1655 * 1656 * @ampdu_action: Perform a certain A-MPDU action 1657 * The RA/TID combination determines the destination and TID we want 1658 * the ampdu action to be performed for. The action is defined through 1659 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1660 * is the first frame we expect to perform the action on. Notice 1661 * that TX/RX_STOP can pass NULL for this parameter. 1662 * Returns a negative error code on failure. 1663 * The callback can sleep. 1664 * 1665 * @get_survey: Return per-channel survey information 1666 * 1667 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 1668 * need to set wiphy->rfkill_poll to %true before registration, 1669 * and need to call wiphy_rfkill_set_hw_state() in the callback. 1670 * The callback can sleep. 1671 * 1672 * @set_coverage_class: Set slot time for given coverage class as specified 1673 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 1674 * accordingly. This callback is not required and may sleep. 1675 * 1676 * @testmode_cmd: Implement a cfg80211 test mode command. 1677 * The callback can sleep. 1678 * 1679 * @flush: Flush all pending frames from the hardware queue, making sure 1680 * that the hardware queues are empty. If the parameter @drop is set 1681 * to %true, pending frames may be dropped. The callback can sleep. 1682 * 1683 * @channel_switch: Drivers that need (or want) to offload the channel 1684 * switch operation for CSAs received from the AP may implement this 1685 * callback. They must then call ieee80211_chswitch_done() to indicate 1686 * completion of the channel switch. 1687 * 1688 * @napi_poll: Poll Rx queue for incoming data frames. 1689 */ 1690struct ieee80211_ops { 1691 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1692 int (*start)(struct ieee80211_hw *hw); 1693 void (*stop)(struct ieee80211_hw *hw); 1694 int (*add_interface)(struct ieee80211_hw *hw, 1695 struct ieee80211_vif *vif); 1696 void (*remove_interface)(struct ieee80211_hw *hw, 1697 struct ieee80211_vif *vif); 1698 int (*config)(struct ieee80211_hw *hw, u32 changed); 1699 void (*bss_info_changed)(struct ieee80211_hw *hw, 1700 struct ieee80211_vif *vif, 1701 struct ieee80211_bss_conf *info, 1702 u32 changed); 1703 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 1704 struct netdev_hw_addr_list *mc_list); 1705 void (*configure_filter)(struct ieee80211_hw *hw, 1706 unsigned int changed_flags, 1707 unsigned int *total_flags, 1708 u64 multicast); 1709 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1710 bool set); 1711 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1712 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 1713 struct ieee80211_key_conf *key); 1714 void (*update_tkip_key)(struct ieee80211_hw *hw, 1715 struct ieee80211_vif *vif, 1716 struct ieee80211_key_conf *conf, 1717 struct ieee80211_sta *sta, 1718 u32 iv32, u16 *phase1key); 1719 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1720 struct cfg80211_scan_request *req); 1721 void (*sw_scan_start)(struct ieee80211_hw *hw); 1722 void (*sw_scan_complete)(struct ieee80211_hw *hw); 1723 int (*get_stats)(struct ieee80211_hw *hw, 1724 struct ieee80211_low_level_stats *stats); 1725 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1726 u32 *iv32, u16 *iv16); 1727 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1728 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1729 struct ieee80211_sta *sta); 1730 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1731 struct ieee80211_sta *sta); 1732 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1733 enum sta_notify_cmd, struct ieee80211_sta *sta); 1734 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1735 const struct ieee80211_tx_queue_params *params); 1736 u64 (*get_tsf)(struct ieee80211_hw *hw); 1737 void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); 1738 void (*reset_tsf)(struct ieee80211_hw *hw); 1739 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1740 int (*ampdu_action)(struct ieee80211_hw *hw, 1741 struct ieee80211_vif *vif, 1742 enum ieee80211_ampdu_mlme_action action, 1743 struct ieee80211_sta *sta, u16 tid, u16 *ssn); 1744 int (*get_survey)(struct ieee80211_hw *hw, int idx, 1745 struct survey_info *survey); 1746 void (*rfkill_poll)(struct ieee80211_hw *hw); 1747 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 1748#ifdef CONFIG_NL80211_TESTMODE 1749 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 1750#endif 1751 void (*flush)(struct ieee80211_hw *hw, bool drop); 1752 void (*channel_switch)(struct ieee80211_hw *hw, 1753 struct ieee80211_channel_switch *ch_switch); 1754 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 1755}; 1756 1757/** 1758 * ieee80211_alloc_hw - Allocate a new hardware device 1759 * 1760 * This must be called once for each hardware device. The returned pointer 1761 * must be used to refer to this device when calling other functions. 1762 * mac80211 allocates a private data area for the driver pointed to by 1763 * @priv in &struct ieee80211_hw, the size of this area is given as 1764 * @priv_data_len. 1765 * 1766 * @priv_data_len: length of private data 1767 * @ops: callbacks for this device 1768 */ 1769struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1770 const struct ieee80211_ops *ops); 1771 1772/** 1773 * ieee80211_register_hw - Register hardware device 1774 * 1775 * You must call this function before any other functions in 1776 * mac80211. Note that before a hardware can be registered, you 1777 * need to fill the contained wiphy's information. 1778 * 1779 * @hw: the device to register as returned by ieee80211_alloc_hw() 1780 */ 1781int ieee80211_register_hw(struct ieee80211_hw *hw); 1782 1783#ifdef CONFIG_MAC80211_LEDS 1784extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1785extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1786extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1787extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1788#endif 1789/** 1790 * ieee80211_get_tx_led_name - get name of TX LED 1791 * 1792 * mac80211 creates a transmit LED trigger for each wireless hardware 1793 * that can be used to drive LEDs if your driver registers a LED device. 1794 * This function returns the name (or %NULL if not configured for LEDs) 1795 * of the trigger so you can automatically link the LED device. 1796 * 1797 * @hw: the hardware to get the LED trigger name for 1798 */ 1799static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1800{ 1801#ifdef CONFIG_MAC80211_LEDS 1802 return __ieee80211_get_tx_led_name(hw); 1803#else 1804 return NULL; 1805#endif 1806} 1807 1808/** 1809 * ieee80211_get_rx_led_name - get name of RX LED 1810 * 1811 * mac80211 creates a receive LED trigger for each wireless hardware 1812 * that can be used to drive LEDs if your driver registers a LED device. 1813 * This function returns the name (or %NULL if not configured for LEDs) 1814 * of the trigger so you can automatically link the LED device. 1815 * 1816 * @hw: the hardware to get the LED trigger name for 1817 */ 1818static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1819{ 1820#ifdef CONFIG_MAC80211_LEDS 1821 return __ieee80211_get_rx_led_name(hw); 1822#else 1823 return NULL; 1824#endif 1825} 1826 1827/** 1828 * ieee80211_get_assoc_led_name - get name of association LED 1829 * 1830 * mac80211 creates a association LED trigger for each wireless hardware 1831 * that can be used to drive LEDs if your driver registers a LED device. 1832 * This function returns the name (or %NULL if not configured for LEDs) 1833 * of the trigger so you can automatically link the LED device. 1834 * 1835 * @hw: the hardware to get the LED trigger name for 1836 */ 1837static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1838{ 1839#ifdef CONFIG_MAC80211_LEDS 1840 return __ieee80211_get_assoc_led_name(hw); 1841#else 1842 return NULL; 1843#endif 1844} 1845 1846/** 1847 * ieee80211_get_radio_led_name - get name of radio LED 1848 * 1849 * mac80211 creates a radio change LED trigger for each wireless hardware 1850 * that can be used to drive LEDs if your driver registers a LED device. 1851 * This function returns the name (or %NULL if not configured for LEDs) 1852 * of the trigger so you can automatically link the LED device. 1853 * 1854 * @hw: the hardware to get the LED trigger name for 1855 */ 1856static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1857{ 1858#ifdef CONFIG_MAC80211_LEDS 1859 return __ieee80211_get_radio_led_name(hw); 1860#else 1861 return NULL; 1862#endif 1863} 1864 1865/** 1866 * ieee80211_unregister_hw - Unregister a hardware device 1867 * 1868 * This function instructs mac80211 to free allocated resources 1869 * and unregister netdevices from the networking subsystem. 1870 * 1871 * @hw: the hardware to unregister 1872 */ 1873void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1874 1875/** 1876 * ieee80211_free_hw - free hardware descriptor 1877 * 1878 * This function frees everything that was allocated, including the 1879 * private data for the driver. You must call ieee80211_unregister_hw() 1880 * before calling this function. 1881 * 1882 * @hw: the hardware to free 1883 */ 1884void ieee80211_free_hw(struct ieee80211_hw *hw); 1885 1886/** 1887 * ieee80211_restart_hw - restart hardware completely 1888 * 1889 * Call this function when the hardware was restarted for some reason 1890 * (hardware error, ...) and the driver is unable to restore its state 1891 * by itself. mac80211 assumes that at this point the driver/hardware 1892 * is completely uninitialised and stopped, it starts the process by 1893 * calling the ->start() operation. The driver will need to reset all 1894 * internal state that it has prior to calling this function. 1895 * 1896 * @hw: the hardware to restart 1897 */ 1898void ieee80211_restart_hw(struct ieee80211_hw *hw); 1899 1900/** ieee80211_napi_schedule - schedule NAPI poll 1901 * 1902 * Use this function to schedule NAPI polling on a device. 1903 * 1904 * @hw: the hardware to start polling 1905 */ 1906void ieee80211_napi_schedule(struct ieee80211_hw *hw); 1907 1908/** ieee80211_napi_complete - complete NAPI polling 1909 * 1910 * Use this function to finish NAPI polling on a device. 1911 * 1912 * @hw: the hardware to stop polling 1913 */ 1914void ieee80211_napi_complete(struct ieee80211_hw *hw); 1915 1916/** 1917 * ieee80211_rx - receive frame 1918 * 1919 * Use this function to hand received frames to mac80211. The receive 1920 * buffer in @skb must start with an IEEE 802.11 header. In case of a 1921 * paged @skb is used, the driver is recommended to put the ieee80211 1922 * header of the frame on the linear part of the @skb to avoid memory 1923 * allocation and/or memcpy by the stack. 1924 * 1925 * This function may not be called in IRQ context. Calls to this function 1926 * for a single hardware must be synchronized against each other. Calls to 1927 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 1928 * mixed for a single hardware. 1929 * 1930 * In process context use instead ieee80211_rx_ni(). 1931 * 1932 * @hw: the hardware this frame came in on 1933 * @skb: the buffer to receive, owned by mac80211 after this call 1934 */ 1935void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 1936 1937/** 1938 * ieee80211_rx_irqsafe - receive frame 1939 * 1940 * Like ieee80211_rx() but can be called in IRQ context 1941 * (internally defers to a tasklet.) 1942 * 1943 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 1944 * be mixed for a single hardware. 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_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 1950 1951/** 1952 * ieee80211_rx_ni - receive frame (in process context) 1953 * 1954 * Like ieee80211_rx() but can be called in process context 1955 * (internally disables bottom halves). 1956 * 1957 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 1958 * not 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 */ 1963static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 1964 struct sk_buff *skb) 1965{ 1966 local_bh_disable(); 1967 ieee80211_rx(hw, skb); 1968 local_bh_enable(); 1969} 1970 1971/* 1972 * The TX headroom reserved by mac80211 for its own tx_status functions. 1973 * This is enough for the radiotap header. 1974 */ 1975#define IEEE80211_TX_STATUS_HEADROOM 13 1976 1977/** 1978 * ieee80211_tx_status - transmit status callback 1979 * 1980 * Call this function for all transmitted frames after they have been 1981 * transmitted. It is permissible to not call this function for 1982 * multicast frames but this can affect statistics. 1983 * 1984 * This function may not be called in IRQ context. Calls to this function 1985 * for a single hardware must be synchronized against each other. Calls 1986 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1987 * for a single hardware. 1988 * 1989 * @hw: the hardware the frame was transmitted by 1990 * @skb: the frame that was transmitted, owned by mac80211 after this call 1991 */ 1992void ieee80211_tx_status(struct ieee80211_hw *hw, 1993 struct sk_buff *skb); 1994 1995/** 1996 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 1997 * 1998 * Like ieee80211_tx_status() but can be called in IRQ context 1999 * (internally defers to a tasklet.) 2000 * 2001 * Calls to this function and ieee80211_tx_status() may not be mixed for a 2002 * single hardware. 2003 * 2004 * @hw: the hardware the frame was transmitted by 2005 * @skb: the frame that was transmitted, owned by mac80211 after this call 2006 */ 2007void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2008 struct sk_buff *skb); 2009 2010/** 2011 * ieee80211_beacon_get_tim - beacon generation function 2012 * @hw: pointer obtained from ieee80211_alloc_hw(). 2013 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2014 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2015 * Set to 0 if invalid (in non-AP modes). 2016 * @tim_length: pointer to variable that will receive the TIM IE length, 2017 * (including the ID and length bytes!). 2018 * Set to 0 if invalid (in non-AP modes). 2019 * 2020 * If the driver implements beaconing modes, it must use this function to 2021 * obtain the beacon frame/template. 2022 * 2023 * If the beacon frames are generated by the host system (i.e., not in 2024 * hardware/firmware), the driver uses this function to get each beacon 2025 * frame from mac80211 -- it is responsible for calling this function 2026 * before the beacon is needed (e.g. based on hardware interrupt). 2027 * 2028 * If the beacon frames are generated by the device, then the driver 2029 * must use the returned beacon as the template and change the TIM IE 2030 * according to the current DTIM parameters/TIM bitmap. 2031 * 2032 * The driver is responsible for freeing the returned skb. 2033 */ 2034struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2035 struct ieee80211_vif *vif, 2036 u16 *tim_offset, u16 *tim_length); 2037 2038/** 2039 * ieee80211_beacon_get - beacon generation function 2040 * @hw: pointer obtained from ieee80211_alloc_hw(). 2041 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2042 * 2043 * See ieee80211_beacon_get_tim(). 2044 */ 2045static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2046 struct ieee80211_vif *vif) 2047{ 2048 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2049} 2050 2051/** 2052 * ieee80211_pspoll_get - retrieve a PS Poll template 2053 * @hw: pointer obtained from ieee80211_alloc_hw(). 2054 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2055 * 2056 * Creates a PS Poll a template which can, for example, uploaded to 2057 * hardware. The template must be updated after association so that correct 2058 * AID, BSSID and MAC address is used. 2059 * 2060 * Note: Caller (or hardware) is responsible for setting the 2061 * &IEEE80211_FCTL_PM bit. 2062 */ 2063struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2064 struct ieee80211_vif *vif); 2065 2066/** 2067 * ieee80211_nullfunc_get - retrieve a nullfunc template 2068 * @hw: pointer obtained from ieee80211_alloc_hw(). 2069 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2070 * 2071 * Creates a Nullfunc template which can, for example, uploaded to 2072 * hardware. The template must be updated after association so that correct 2073 * BSSID and address is used. 2074 * 2075 * Note: Caller (or hardware) is responsible for setting the 2076 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2077 */ 2078struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2079 struct ieee80211_vif *vif); 2080 2081/** 2082 * ieee80211_probereq_get - retrieve a Probe Request template 2083 * @hw: pointer obtained from ieee80211_alloc_hw(). 2084 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2085 * @ssid: SSID buffer 2086 * @ssid_len: length of SSID 2087 * @ie: buffer containing all IEs except SSID for the template 2088 * @ie_len: length of the IE buffer 2089 * 2090 * Creates a Probe Request template which can, for example, be uploaded to 2091 * hardware. 2092 */ 2093struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2094 struct ieee80211_vif *vif, 2095 const u8 *ssid, size_t ssid_len, 2096 const u8 *ie, size_t ie_len); 2097 2098/** 2099 * ieee80211_rts_get - RTS frame generation function 2100 * @hw: pointer obtained from ieee80211_alloc_hw(). 2101 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2102 * @frame: pointer to the frame that is going to be protected by the RTS. 2103 * @frame_len: the frame length (in octets). 2104 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2105 * @rts: The buffer where to store the RTS frame. 2106 * 2107 * If the RTS frames are generated by the host system (i.e., not in 2108 * hardware/firmware), the low-level driver uses this function to receive 2109 * the next RTS frame from the 802.11 code. The low-level is responsible 2110 * for calling this function before and RTS frame is needed. 2111 */ 2112void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2113 const void *frame, size_t frame_len, 2114 const struct ieee80211_tx_info *frame_txctl, 2115 struct ieee80211_rts *rts); 2116 2117/** 2118 * ieee80211_rts_duration - Get the duration field for an RTS frame 2119 * @hw: pointer obtained from ieee80211_alloc_hw(). 2120 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2121 * @frame_len: the length of the frame that is going to be protected by the RTS. 2122 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2123 * 2124 * If the RTS is generated in firmware, but the host system must provide 2125 * the duration field, the low-level driver uses this function to receive 2126 * the duration field value in little-endian byteorder. 2127 */ 2128__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2129 struct ieee80211_vif *vif, size_t frame_len, 2130 const struct ieee80211_tx_info *frame_txctl); 2131 2132/** 2133 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2134 * @hw: pointer obtained from ieee80211_alloc_hw(). 2135 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2136 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2137 * @frame_len: the frame length (in octets). 2138 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2139 * @cts: The buffer where to store the CTS-to-self frame. 2140 * 2141 * If the CTS-to-self frames are generated by the host system (i.e., not in 2142 * hardware/firmware), the low-level driver uses this function to receive 2143 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2144 * for calling this function before and CTS-to-self frame is needed. 2145 */ 2146void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2147 struct ieee80211_vif *vif, 2148 const void *frame, size_t frame_len, 2149 const struct ieee80211_tx_info *frame_txctl, 2150 struct ieee80211_cts *cts); 2151 2152/** 2153 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2154 * @hw: pointer obtained from ieee80211_alloc_hw(). 2155 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2156 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2157 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2158 * 2159 * If the CTS-to-self is generated in firmware, but the host system must provide 2160 * the duration field, the low-level driver uses this function to receive 2161 * the duration field value in little-endian byteorder. 2162 */ 2163__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2164 struct ieee80211_vif *vif, 2165 size_t frame_len, 2166 const struct ieee80211_tx_info *frame_txctl); 2167 2168/** 2169 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2170 * @hw: pointer obtained from ieee80211_alloc_hw(). 2171 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2172 * @frame_len: the length of the frame. 2173 * @rate: the rate at which the frame is going to be transmitted. 2174 * 2175 * Calculate the duration field of some generic frame, given its 2176 * length and transmission rate (in 100kbps). 2177 */ 2178__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2179 struct ieee80211_vif *vif, 2180 size_t frame_len, 2181 struct ieee80211_rate *rate); 2182 2183/** 2184 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2185 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2186 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2187 * 2188 * Function for accessing buffered broadcast and multicast frames. If 2189 * hardware/firmware does not implement buffering of broadcast/multicast 2190 * frames when power saving is used, 802.11 code buffers them in the host 2191 * memory. The low-level driver uses this function to fetch next buffered 2192 * frame. In most cases, this is used when generating beacon frame. This 2193 * function returns a pointer to the next buffered skb or NULL if no more 2194 * buffered frames are available. 2195 * 2196 * Note: buffered frames are returned only after DTIM beacon frame was 2197 * generated with ieee80211_beacon_get() and the low-level driver must thus 2198 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2199 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2200 * does not need to check for DTIM beacons separately and should be able to 2201 * use common code for all beacons. 2202 */ 2203struct sk_buff * 2204ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2205 2206/** 2207 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 2208 * 2209 * This function computes a TKIP rc4 key for an skb. It computes 2210 * a phase 1 key if needed (iv16 wraps around). This function is to 2211 * be used by drivers which can do HW encryption but need to compute 2212 * to phase 1/2 key in SW. 2213 * 2214 * @keyconf: the parameter passed with the set key 2215 * @skb: the skb for which the key is needed 2216 * @type: TBD 2217 * @key: a buffer to which the key will be written 2218 */ 2219void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 2220 struct sk_buff *skb, 2221 enum ieee80211_tkip_key_type type, u8 *key); 2222/** 2223 * ieee80211_wake_queue - wake specific queue 2224 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2225 * @queue: queue number (counted from zero). 2226 * 2227 * Drivers should use this function instead of netif_wake_queue. 2228 */ 2229void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 2230 2231/** 2232 * ieee80211_stop_queue - stop specific queue 2233 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2234 * @queue: queue number (counted from zero). 2235 * 2236 * Drivers should use this function instead of netif_stop_queue. 2237 */ 2238void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 2239 2240/** 2241 * ieee80211_queue_stopped - test status of the queue 2242 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2243 * @queue: queue number (counted from zero). 2244 * 2245 * Drivers should use this function instead of netif_stop_queue. 2246 */ 2247 2248int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 2249 2250/** 2251 * ieee80211_stop_queues - stop all queues 2252 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2253 * 2254 * Drivers should use this function instead of netif_stop_queue. 2255 */ 2256void ieee80211_stop_queues(struct ieee80211_hw *hw); 2257 2258/** 2259 * ieee80211_wake_queues - wake all queues 2260 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2261 * 2262 * Drivers should use this function instead of netif_wake_queue. 2263 */ 2264void ieee80211_wake_queues(struct ieee80211_hw *hw); 2265 2266/** 2267 * ieee80211_scan_completed - completed hardware scan 2268 * 2269 * When hardware scan offload is used (i.e. the hw_scan() callback is 2270 * assigned) this function needs to be called by the driver to notify 2271 * mac80211 that the scan finished. This function can be called from 2272 * any context, including hardirq context. 2273 * 2274 * @hw: the hardware that finished the scan 2275 * @aborted: set to true if scan was aborted 2276 */ 2277void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 2278 2279/** 2280 * ieee80211_iterate_active_interfaces - iterate active interfaces 2281 * 2282 * This function iterates over the interfaces associated with a given 2283 * hardware that are currently active and calls the callback for them. 2284 * This function allows the iterator function to sleep, when the iterator 2285 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 2286 * be used. 2287 * 2288 * @hw: the hardware struct of which the interfaces should be iterated over 2289 * @iterator: the iterator function to call 2290 * @data: first argument of the iterator function 2291 */ 2292void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 2293 void (*iterator)(void *data, u8 *mac, 2294 struct ieee80211_vif *vif), 2295 void *data); 2296 2297/** 2298 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 2299 * 2300 * This function iterates over the interfaces associated with a given 2301 * hardware that are currently active and calls the callback for them. 2302 * This function requires the iterator callback function to be atomic, 2303 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 2304 * 2305 * @hw: the hardware struct of which the interfaces should be iterated over 2306 * @iterator: the iterator function to call, cannot sleep 2307 * @data: first argument of the iterator function 2308 */ 2309void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 2310 void (*iterator)(void *data, 2311 u8 *mac, 2312 struct ieee80211_vif *vif), 2313 void *data); 2314 2315/** 2316 * ieee80211_queue_work - add work onto the mac80211 workqueue 2317 * 2318 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 2319 * This helper ensures drivers are not queueing work when they should not be. 2320 * 2321 * @hw: the hardware struct for the interface we are adding work for 2322 * @work: the work we want to add onto the mac80211 workqueue 2323 */ 2324void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 2325 2326/** 2327 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 2328 * 2329 * Drivers and mac80211 use this to queue delayed work onto the mac80211 2330 * workqueue. 2331 * 2332 * @hw: the hardware struct for the interface we are adding work for 2333 * @dwork: delayable work to queue onto the mac80211 workqueue 2334 * @delay: number of jiffies to wait before queueing 2335 */ 2336void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 2337 struct delayed_work *dwork, 2338 unsigned long delay); 2339 2340/** 2341 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 2342 * @sta: the station for which to start a BA session 2343 * @tid: the TID to BA on. 2344 * 2345 * Return: success if addBA request was sent, failure otherwise 2346 * 2347 * Although mac80211/low level driver/user space application can estimate 2348 * the need to start aggregation on a certain RA/TID, the session level 2349 * will be managed by the mac80211. 2350 */ 2351int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2352 2353/** 2354 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 2355 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2356 * @ra: receiver address of the BA session recipient. 2357 * @tid: the TID to BA on. 2358 * 2359 * This function must be called by low level driver once it has 2360 * finished with preparations for the BA session. It can be called 2361 * from any context. 2362 */ 2363void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2364 u16 tid); 2365 2366/** 2367 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 2368 * @sta: the station whose BA session to stop 2369 * @tid: the TID to stop BA. 2370 * 2371 * Return: negative error if the TID is invalid, or no aggregation active 2372 * 2373 * Although mac80211/low level driver/user space application can estimate 2374 * the need to stop aggregation on a certain RA/TID, the session level 2375 * will be managed by the mac80211. 2376 */ 2377int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2378 2379/** 2380 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 2381 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2382 * @ra: receiver address of the BA session recipient. 2383 * @tid: the desired TID to BA on. 2384 * 2385 * This function must be called by low level driver once it has 2386 * finished with preparations for the BA session tear down. It 2387 * can be called from any context. 2388 */ 2389void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2390 u16 tid); 2391 2392/** 2393 * ieee80211_find_sta - find a station 2394 * 2395 * @vif: virtual interface to look for station on 2396 * @addr: station's address 2397 * 2398 * This function must be called under RCU lock and the 2399 * resulting pointer is only valid under RCU lock as well. 2400 */ 2401struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 2402 const u8 *addr); 2403 2404/** 2405 * ieee80211_find_sta_by_hw - find a station on hardware 2406 * 2407 * @hw: pointer as obtained from ieee80211_alloc_hw() 2408 * @addr: station's address 2409 * 2410 * This function must be called under RCU lock and the 2411 * resulting pointer is only valid under RCU lock as well. 2412 * 2413 * NOTE: This function should not be used! When mac80211 is converted 2414 * internally to properly keep track of stations on multiple 2415 * virtual interfaces, it will not always know which station to 2416 * return here since a single address might be used by multiple 2417 * logical stations (e.g. consider a station connecting to another 2418 * BSSID on the same AP hardware without disconnecting first). 2419 * 2420 * DO NOT USE THIS FUNCTION. 2421 */ 2422struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw, 2423 const u8 *addr); 2424 2425/** 2426 * ieee80211_sta_block_awake - block station from waking up 2427 * @hw: the hardware 2428 * @pubsta: the station 2429 * @block: whether to block or unblock 2430 * 2431 * Some devices require that all frames that are on the queues 2432 * for a specific station that went to sleep are flushed before 2433 * a poll response or frames after the station woke up can be 2434 * delivered to that it. Note that such frames must be rejected 2435 * by the driver as filtered, with the appropriate status flag. 2436 * 2437 * This function allows implementing this mode in a race-free 2438 * manner. 2439 * 2440 * To do this, a driver must keep track of the number of frames 2441 * still enqueued for a specific station. If this number is not 2442 * zero when the station goes to sleep, the driver must call 2443 * this function to force mac80211 to consider the station to 2444 * be asleep regardless of the station's actual state. Once the 2445 * number of outstanding frames reaches zero, the driver must 2446 * call this function again to unblock the station. That will 2447 * cause mac80211 to be able to send ps-poll responses, and if 2448 * the station queried in the meantime then frames will also 2449 * be sent out as a result of this. Additionally, the driver 2450 * will be notified that the station woke up some time after 2451 * it is unblocked, regardless of whether the station actually 2452 * woke up while blocked or not. 2453 */ 2454void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2455 struct ieee80211_sta *pubsta, bool block); 2456 2457/** 2458 * ieee80211_beacon_loss - inform hardware does not receive beacons 2459 * 2460 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2461 * 2462 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER and 2463 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 2464 * hardware is not receiving beacons with this function. 2465 */ 2466void ieee80211_beacon_loss(struct ieee80211_vif *vif); 2467 2468/** 2469 * ieee80211_connection_loss - inform hardware has lost connection to the AP 2470 * 2471 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2472 * 2473 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER, and 2474 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 2475 * needs to inform if the connection to the AP has been lost. 2476 * 2477 * This function will cause immediate change to disassociated state, 2478 * without connection recovery attempts. 2479 */ 2480void ieee80211_connection_loss(struct ieee80211_vif *vif); 2481 2482/** 2483 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 2484 * 2485 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2486 * 2487 * Some hardware require full power save to manage simultaneous BT traffic 2488 * on the WLAN frequency. Full PSM is required periodically, whenever there are 2489 * burst of BT traffic. The hardware gets information of BT traffic via 2490 * hardware co-existence lines, and consequentially requests mac80211 to 2491 * (temporarily) enter full psm. 2492 * This function will only temporarily disable dynamic PS, not enable PSM if 2493 * it was not already enabled. 2494 * The driver must make sure to re-enable dynamic PS using 2495 * ieee80211_enable_dyn_ps() if the driver has disabled it. 2496 * 2497 */ 2498void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 2499 2500/** 2501 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 2502 * 2503 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2504 * 2505 * This function restores dynamic PS after being temporarily disabled via 2506 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 2507 * be coupled with an eventual call to this function. 2508 * 2509 */ 2510void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 2511 2512/** 2513 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 2514 * rssi threshold triggered 2515 * 2516 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2517 * @rssi_event: the RSSI trigger event type 2518 * @gfp: context flags 2519 * 2520 * When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality 2521 * monitoring is configured with an rssi threshold, the driver will inform 2522 * whenever the rssi level reaches the threshold. 2523 */ 2524void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 2525 enum nl80211_cqm_rssi_threshold_event rssi_event, 2526 gfp_t gfp); 2527 2528/** 2529 * ieee80211_chswitch_done - Complete channel switch process 2530 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2531 * @success: make the channel switch successful or not 2532 * 2533 * Complete the channel switch post-process: set the new operational channel 2534 * and wake up the suspended queues. 2535 */ 2536void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 2537 2538/** 2539 * ieee80211_request_smps - request SM PS transition 2540 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2541 * @smps_mode: new SM PS mode 2542 * 2543 * This allows the driver to request an SM PS transition in managed 2544 * mode. This is useful when the driver has more information than 2545 * the stack about possible interference, for example by bluetooth. 2546 */ 2547void ieee80211_request_smps(struct ieee80211_vif *vif, 2548 enum ieee80211_smps_mode smps_mode); 2549 2550/* Rate control API */ 2551 2552/** 2553 * enum rate_control_changed - flags to indicate which parameter changed 2554 * 2555 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 2556 * changed, rate control algorithm can update its internal state if needed. 2557 */ 2558enum rate_control_changed { 2559 IEEE80211_RC_HT_CHANGED = BIT(0) 2560}; 2561 2562/** 2563 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 2564 * 2565 * @hw: The hardware the algorithm is invoked for. 2566 * @sband: The band this frame is being transmitted on. 2567 * @bss_conf: the current BSS configuration 2568 * @reported_rate: The rate control algorithm can fill this in to indicate 2569 * which rate should be reported to userspace as the current rate and 2570 * used for rate calculations in the mesh network. 2571 * @rts: whether RTS will be used for this frame because it is longer than the 2572 * RTS threshold 2573 * @short_preamble: whether mac80211 will request short-preamble transmission 2574 * if the selected rate supports it 2575 * @max_rate_idx: user-requested maximum rate (not MCS for now) 2576 * (deprecated; this will be removed once drivers get updated to use 2577 * rate_idx_mask) 2578 * @rate_idx_mask: user-requested rate mask (not MCS for now) 2579 * @skb: the skb that will be transmitted, the control information in it needs 2580 * to be filled in 2581 * @ap: whether this frame is sent out in AP mode 2582 */ 2583struct ieee80211_tx_rate_control { 2584 struct ieee80211_hw *hw; 2585 struct ieee80211_supported_band *sband; 2586 struct ieee80211_bss_conf *bss_conf; 2587 struct sk_buff *skb; 2588 struct ieee80211_tx_rate reported_rate; 2589 bool rts, short_preamble; 2590 u8 max_rate_idx; 2591 u32 rate_idx_mask; 2592 bool ap; 2593}; 2594 2595struct rate_control_ops { 2596 struct module *module; 2597 const char *name; 2598 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 2599 void (*free)(void *priv); 2600 2601 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 2602 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 2603 struct ieee80211_sta *sta, void *priv_sta); 2604 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 2605 struct ieee80211_sta *sta, 2606 void *priv_sta, u32 changed, 2607 enum nl80211_channel_type oper_chan_type); 2608 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 2609 void *priv_sta); 2610 2611 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 2612 struct ieee80211_sta *sta, void *priv_sta, 2613 struct sk_buff *skb); 2614 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 2615 struct ieee80211_tx_rate_control *txrc); 2616 2617 void (*add_sta_debugfs)(void *priv, void *priv_sta, 2618 struct dentry *dir); 2619 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 2620}; 2621 2622static inline int rate_supported(struct ieee80211_sta *sta, 2623 enum ieee80211_band band, 2624 int index) 2625{ 2626 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 2627} 2628 2629/** 2630 * rate_control_send_low - helper for drivers for management/no-ack frames 2631 * 2632 * Rate control algorithms that agree to use the lowest rate to 2633 * send management frames and NO_ACK data with the respective hw 2634 * retries should use this in the beginning of their mac80211 get_rate 2635 * callback. If true is returned the rate control can simply return. 2636 * If false is returned we guarantee that sta and sta and priv_sta is 2637 * not null. 2638 * 2639 * Rate control algorithms wishing to do more intelligent selection of 2640 * rate for multicast/broadcast frames may choose to not use this. 2641 * 2642 * @sta: &struct ieee80211_sta pointer to the target destination. Note 2643 * that this may be null. 2644 * @priv_sta: private rate control structure. This may be null. 2645 * @txrc: rate control information we sholud populate for mac80211. 2646 */ 2647bool rate_control_send_low(struct ieee80211_sta *sta, 2648 void *priv_sta, 2649 struct ieee80211_tx_rate_control *txrc); 2650 2651 2652static inline s8 2653rate_lowest_index(struct ieee80211_supported_band *sband, 2654 struct ieee80211_sta *sta) 2655{ 2656 int i; 2657 2658 for (i = 0; i < sband->n_bitrates; i++) 2659 if (rate_supported(sta, sband->band, i)) 2660 return i; 2661 2662 /* warn when we cannot find a rate. */ 2663 WARN_ON(1); 2664 2665 return 0; 2666} 2667 2668static inline 2669bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 2670 struct ieee80211_sta *sta) 2671{ 2672 unsigned int i; 2673 2674 for (i = 0; i < sband->n_bitrates; i++) 2675 if (rate_supported(sta, sband->band, i)) 2676 return true; 2677 return false; 2678} 2679 2680int ieee80211_rate_control_register(struct rate_control_ops *ops); 2681void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 2682 2683static inline bool 2684conf_is_ht20(struct ieee80211_conf *conf) 2685{ 2686 return conf->channel_type == NL80211_CHAN_HT20; 2687} 2688 2689static inline bool 2690conf_is_ht40_minus(struct ieee80211_conf *conf) 2691{ 2692 return conf->channel_type == NL80211_CHAN_HT40MINUS; 2693} 2694 2695static inline bool 2696conf_is_ht40_plus(struct ieee80211_conf *conf) 2697{ 2698 return conf->channel_type == NL80211_CHAN_HT40PLUS; 2699} 2700 2701static inline bool 2702conf_is_ht40(struct ieee80211_conf *conf) 2703{ 2704 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 2705} 2706 2707static inline bool 2708conf_is_ht(struct ieee80211_conf *conf) 2709{ 2710 return conf->channel_type != NL80211_CHAN_NO_HT; 2711} 2712 2713#endif /* MAC80211_H */ 2714