mac80211.h revision 4bce22b9b84032c77c7e038b07b24fcc706dfc10
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 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 101 * @IEEE80211_AC_VO: voice 102 * @IEEE80211_AC_VI: video 103 * @IEEE80211_AC_BE: best effort 104 * @IEEE80211_AC_BK: background 105 */ 106enum ieee80211_ac_numbers { 107 IEEE80211_AC_VO = 0, 108 IEEE80211_AC_VI = 1, 109 IEEE80211_AC_BE = 2, 110 IEEE80211_AC_BK = 3, 111}; 112 113/** 114 * struct ieee80211_tx_queue_params - transmit queue configuration 115 * 116 * The information provided in this structure is required for QoS 117 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 118 * 119 * @aifs: arbitration interframe space [0..255] 120 * @cw_min: minimum contention window [a value of the form 121 * 2^n-1 in the range 1..32767] 122 * @cw_max: maximum contention window [like @cw_min] 123 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 124 * @uapsd: is U-APSD mode enabled for the queue 125 */ 126struct ieee80211_tx_queue_params { 127 u16 txop; 128 u16 cw_min; 129 u16 cw_max; 130 u8 aifs; 131 bool uapsd; 132}; 133 134struct ieee80211_low_level_stats { 135 unsigned int dot11ACKFailureCount; 136 unsigned int dot11RTSFailureCount; 137 unsigned int dot11FCSErrorCount; 138 unsigned int dot11RTSSuccessCount; 139}; 140 141/** 142 * enum ieee80211_bss_change - BSS change notification flags 143 * 144 * These flags are used with the bss_info_changed() callback 145 * to indicate which BSS parameter changed. 146 * 147 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 148 * also implies a change in the AID. 149 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 150 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 151 * @BSS_CHANGED_ERP_SLOT: slot timing changed 152 * @BSS_CHANGED_HT: 802.11n parameters changed 153 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 154 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 155 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 156 * reason (IBSS and managed mode) 157 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 158 * new beacon (beaconing modes) 159 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 160 * enabled/disabled (beaconing modes) 161 * @BSS_CHANGED_CQM: Connection quality monitor config changed 162 * @BSS_CHANGED_IBSS: IBSS join status changed 163 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 164 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 165 * that it is only ever disabled for station mode. 166 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 167 */ 168enum ieee80211_bss_change { 169 BSS_CHANGED_ASSOC = 1<<0, 170 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 171 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 172 BSS_CHANGED_ERP_SLOT = 1<<3, 173 BSS_CHANGED_HT = 1<<4, 174 BSS_CHANGED_BASIC_RATES = 1<<5, 175 BSS_CHANGED_BEACON_INT = 1<<6, 176 BSS_CHANGED_BSSID = 1<<7, 177 BSS_CHANGED_BEACON = 1<<8, 178 BSS_CHANGED_BEACON_ENABLED = 1<<9, 179 BSS_CHANGED_CQM = 1<<10, 180 BSS_CHANGED_IBSS = 1<<11, 181 BSS_CHANGED_ARP_FILTER = 1<<12, 182 BSS_CHANGED_QOS = 1<<13, 183 BSS_CHANGED_IDLE = 1<<14, 184 185 /* when adding here, make sure to change ieee80211_reconfig */ 186}; 187 188/* 189 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 190 * of addresses for an interface increase beyond this value, hardware ARP 191 * filtering will be disabled. 192 */ 193#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 194 195/** 196 * struct ieee80211_bss_conf - holds the BSS's changing parameters 197 * 198 * This structure keeps information about a BSS (and an association 199 * to that BSS) that can change during the lifetime of the BSS. 200 * 201 * @assoc: association status 202 * @ibss_joined: indicates whether this station is part of an IBSS 203 * or not 204 * @aid: association ID number, valid only when @assoc is true 205 * @use_cts_prot: use CTS protection 206 * @use_short_preamble: use 802.11b short preamble; 207 * if the hardware cannot handle this it must set the 208 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 209 * @use_short_slot: use short slot time (only relevant for ERP); 210 * if the hardware cannot handle this it must set the 211 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 212 * @dtim_period: num of beacons before the next DTIM, for beaconing, 213 * valid in station mode only while @assoc is true and if also 214 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 215 * @ps_dtim_period) 216 * @timestamp: beacon timestamp 217 * @beacon_int: beacon interval 218 * @assoc_capability: capabilities taken from assoc resp 219 * @basic_rates: bitmap of basic rates, each bit stands for an 220 * index into the rate table configured by the driver in 221 * the current band. 222 * @mcast_rate: multicast rate for AP and Ad-Hoc (in 100 kbps) 223 * @bssid: The BSSID for this BSS 224 * @enable_beacon: whether beaconing should be enabled or not 225 * @channel_type: Channel type for this BSS -- the hardware might be 226 * configured for HT40+ while this BSS only uses no-HT, for 227 * example. 228 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 229 * This field is only valid when the channel type is one of the HT types. 230 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 231 * implies disabled 232 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 233 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 234 * may filter ARP queries targeted for other addresses than listed here. 235 * The driver must allow ARP queries targeted for all address listed here 236 * to pass through. An empty list implies no ARP queries need to pass. 237 * @arp_addr_cnt: Number of addresses currently on the list. 238 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 239 * filter ARP queries based on the @arp_addr_list, if disabled, the 240 * hardware must not perform any ARP filtering. Note, that the filter will 241 * be enabled also in promiscuous mode. 242 * @qos: This is a QoS-enabled BSS. 243 * @idle: This interface is idle. There's also a global idle flag in the 244 * hardware config which may be more appropriate depending on what 245 * your driver/device needs to do. 246 */ 247struct ieee80211_bss_conf { 248 const u8 *bssid; 249 /* association related data */ 250 bool assoc, ibss_joined; 251 u16 aid; 252 /* erp related data */ 253 bool use_cts_prot; 254 bool use_short_preamble; 255 bool use_short_slot; 256 bool enable_beacon; 257 u8 dtim_period; 258 u16 beacon_int; 259 u16 assoc_capability; 260 u64 timestamp; 261 u32 basic_rates; 262 u32 mcast_rate; 263 u16 ht_operation_mode; 264 s32 cqm_rssi_thold; 265 u32 cqm_rssi_hyst; 266 enum nl80211_channel_type channel_type; 267 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 268 u8 arp_addr_cnt; 269 bool arp_filter_enabled; 270 bool qos; 271 bool idle; 272}; 273 274/** 275 * enum mac80211_tx_control_flags - flags to describe transmission information/status 276 * 277 * These flags are used with the @flags member of &ieee80211_tx_info. 278 * 279 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 280 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 281 * number to this frame, taking care of not overwriting the fragment 282 * number and increasing the sequence number only when the 283 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 284 * assign sequence numbers to QoS-data frames but cannot do so correctly 285 * for non-QoS-data and management frames because beacons need them from 286 * that counter as well and mac80211 cannot guarantee proper sequencing. 287 * If this flag is set, the driver should instruct the hardware to 288 * assign a sequence number to the frame or assign one itself. Cf. IEEE 289 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 290 * beacons and always be clear for frames without a sequence number field. 291 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 292 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 293 * station 294 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 295 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 296 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 297 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 298 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 299 * because the destination STA was in powersave mode. Note that to 300 * avoid race conditions, the filter must be set by the hardware or 301 * firmware upon receiving a frame that indicates that the station 302 * went to sleep (must be done on device to filter frames already on 303 * the queue) and may only be unset after mac80211 gives the OK for 304 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 305 * since only then is it guaranteed that no more frames are in the 306 * hardware queue. 307 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 308 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 309 * is for the whole aggregation. 310 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 311 * so consider using block ack request (BAR). 312 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 313 * set by rate control algorithms to indicate probe rate, will 314 * be cleared for fragmented frames (except on the last fragment) 315 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 316 * used to indicate that a pending frame requires TX processing before 317 * it can be sent out. 318 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 319 * used to indicate that a frame was already retried due to PS 320 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 321 * used to indicate frame should not be encrypted 322 * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) 323 * This frame is a response to a PS-poll frame and should be sent 324 * although the station is in powersave mode. 325 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 326 * transmit function after the current frame, this can be used 327 * by drivers to kick the DMA queue only if unset or when the 328 * queue gets full. 329 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 330 * after TX status because the destination was asleep, it must not 331 * be modified again (no seqno assignment, crypto, etc.) 332 * @IEEE80211_TX_INTFL_HAS_RADIOTAP: This frame was injected and still 333 * has a radiotap header at skb->data. 334 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 335 * MLME command (internal to mac80211 to figure out whether to send TX 336 * status to user space) 337 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 338 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 339 * frame and selects the maximum number of streams that it can use. 340 * 341 * Note: If you have to add new flags to the enumeration, then don't 342 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 343 */ 344enum mac80211_tx_control_flags { 345 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 346 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 347 IEEE80211_TX_CTL_NO_ACK = BIT(2), 348 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 349 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 350 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 351 IEEE80211_TX_CTL_AMPDU = BIT(6), 352 IEEE80211_TX_CTL_INJECTED = BIT(7), 353 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 354 IEEE80211_TX_STAT_ACK = BIT(9), 355 IEEE80211_TX_STAT_AMPDU = BIT(10), 356 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 357 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 358 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 359 IEEE80211_TX_INTFL_RETRIED = BIT(15), 360 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 361 IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), 362 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 363 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 364 IEEE80211_TX_INTFL_HAS_RADIOTAP = BIT(20), 365 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 366 IEEE80211_TX_CTL_LDPC = BIT(22), 367 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 368}; 369 370#define IEEE80211_TX_CTL_STBC_SHIFT 23 371 372/* 373 * This definition is used as a mask to clear all temporary flags, which are 374 * set by the tx handlers for each transmission attempt by the mac80211 stack. 375 */ 376#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 377 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 378 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 379 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 380 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 381 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_PSPOLL_RESPONSE | \ 382 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 383 IEEE80211_TX_CTL_STBC) 384 385/** 386 * enum mac80211_rate_control_flags - per-rate flags set by the 387 * Rate Control algorithm. 388 * 389 * These flags are set by the Rate control algorithm for each rate during tx, 390 * in the @flags member of struct ieee80211_tx_rate. 391 * 392 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 393 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 394 * This is set if the current BSS requires ERP protection. 395 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 396 * @IEEE80211_TX_RC_MCS: HT rate. 397 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 398 * Greenfield mode. 399 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 400 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 401 * adjacent 20 MHz channels, if the current channel type is 402 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 403 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 404 */ 405enum mac80211_rate_control_flags { 406 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 407 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 408 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 409 410 /* rate index is an MCS rate number instead of an index */ 411 IEEE80211_TX_RC_MCS = BIT(3), 412 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 413 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 414 IEEE80211_TX_RC_DUP_DATA = BIT(6), 415 IEEE80211_TX_RC_SHORT_GI = BIT(7), 416}; 417 418 419/* there are 40 bytes if you don't need the rateset to be kept */ 420#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 421 422/* if you do need the rateset, then you have less space */ 423#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 424 425/* maximum number of rate stages */ 426#define IEEE80211_TX_MAX_RATES 5 427 428/** 429 * struct ieee80211_tx_rate - rate selection/status 430 * 431 * @idx: rate index to attempt to send with 432 * @flags: rate control flags (&enum mac80211_rate_control_flags) 433 * @count: number of tries in this rate before going to the next rate 434 * 435 * A value of -1 for @idx indicates an invalid rate and, if used 436 * in an array of retry rates, that no more rates should be tried. 437 * 438 * When used for transmit status reporting, the driver should 439 * always report the rate along with the flags it used. 440 * 441 * &struct ieee80211_tx_info contains an array of these structs 442 * in the control information, and it will be filled by the rate 443 * control algorithm according to what should be sent. For example, 444 * if this array contains, in the format { <idx>, <count> } the 445 * information 446 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 447 * then this means that the frame should be transmitted 448 * up to twice at rate 3, up to twice at rate 2, and up to four 449 * times at rate 1 if it doesn't get acknowledged. Say it gets 450 * acknowledged by the peer after the fifth attempt, the status 451 * information should then contain 452 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 453 * since it was transmitted twice at rate 3, twice at rate 2 454 * and once at rate 1 after which we received an acknowledgement. 455 */ 456struct ieee80211_tx_rate { 457 s8 idx; 458 u8 count; 459 u8 flags; 460} __packed; 461 462/** 463 * struct ieee80211_tx_info - skb transmit information 464 * 465 * This structure is placed in skb->cb for three uses: 466 * (1) mac80211 TX control - mac80211 tells the driver what to do 467 * (2) driver internal use (if applicable) 468 * (3) TX status information - driver tells mac80211 what happened 469 * 470 * The TX control's sta pointer is only valid during the ->tx call, 471 * it may be NULL. 472 * 473 * @flags: transmit info flags, defined above 474 * @band: the band to transmit on (use for checking for races) 475 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 476 * @pad: padding, ignore 477 * @control: union for control data 478 * @status: union for status data 479 * @driver_data: array of driver_data pointers 480 * @ampdu_ack_len: number of acked aggregated frames. 481 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 482 * @ampdu_len: number of aggregated frames. 483 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 484 * @ack_signal: signal strength of the ACK frame 485 */ 486struct ieee80211_tx_info { 487 /* common information */ 488 u32 flags; 489 u8 band; 490 491 u8 antenna_sel_tx; 492 493 /* 2 byte hole */ 494 u8 pad[2]; 495 496 union { 497 struct { 498 union { 499 /* rate control */ 500 struct { 501 struct ieee80211_tx_rate rates[ 502 IEEE80211_TX_MAX_RATES]; 503 s8 rts_cts_rate_idx; 504 }; 505 /* only needed before rate control */ 506 unsigned long jiffies; 507 }; 508 /* NB: vif can be NULL for injected frames */ 509 struct ieee80211_vif *vif; 510 struct ieee80211_key_conf *hw_key; 511 struct ieee80211_sta *sta; 512 } control; 513 struct { 514 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 515 u8 ampdu_ack_len; 516 int ack_signal; 517 u8 ampdu_len; 518 /* 15 bytes free */ 519 } status; 520 struct { 521 struct ieee80211_tx_rate driver_rates[ 522 IEEE80211_TX_MAX_RATES]; 523 void *rate_driver_data[ 524 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 525 }; 526 void *driver_data[ 527 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 528 }; 529}; 530 531static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 532{ 533 return (struct ieee80211_tx_info *)skb->cb; 534} 535 536static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 537{ 538 return (struct ieee80211_rx_status *)skb->cb; 539} 540 541/** 542 * ieee80211_tx_info_clear_status - clear TX status 543 * 544 * @info: The &struct ieee80211_tx_info to be cleared. 545 * 546 * When the driver passes an skb back to mac80211, it must report 547 * a number of things in TX status. This function clears everything 548 * in the TX status but the rate control information (it does clear 549 * the count since you need to fill that in anyway). 550 * 551 * NOTE: You can only use this function if you do NOT use 552 * info->driver_data! Use info->rate_driver_data 553 * instead if you need only the less space that allows. 554 */ 555static inline void 556ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 557{ 558 int i; 559 560 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 561 offsetof(struct ieee80211_tx_info, control.rates)); 562 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 563 offsetof(struct ieee80211_tx_info, driver_rates)); 564 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 565 /* clear the rate counts */ 566 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 567 info->status.rates[i].count = 0; 568 569 BUILD_BUG_ON( 570 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 571 memset(&info->status.ampdu_ack_len, 0, 572 sizeof(struct ieee80211_tx_info) - 573 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 574} 575 576 577/** 578 * enum mac80211_rx_flags - receive flags 579 * 580 * These flags are used with the @flag member of &struct ieee80211_rx_status. 581 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 582 * Use together with %RX_FLAG_MMIC_STRIPPED. 583 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 584 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 585 * verification has been done by the hardware. 586 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 587 * If this flag is set, the stack cannot do any replay detection 588 * hence the driver or hardware will have to do that. 589 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 590 * the frame. 591 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 592 * the frame. 593 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 594 * is valid. This is useful in monitor mode and necessary for beacon frames 595 * to enable IBSS merging. 596 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 597 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 598 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 599 * @RX_FLAG_SHORT_GI: Short guard interval was used 600 */ 601enum mac80211_rx_flags { 602 RX_FLAG_MMIC_ERROR = 1<<0, 603 RX_FLAG_DECRYPTED = 1<<1, 604 RX_FLAG_MMIC_STRIPPED = 1<<3, 605 RX_FLAG_IV_STRIPPED = 1<<4, 606 RX_FLAG_FAILED_FCS_CRC = 1<<5, 607 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 608 RX_FLAG_TSFT = 1<<7, 609 RX_FLAG_SHORTPRE = 1<<8, 610 RX_FLAG_HT = 1<<9, 611 RX_FLAG_40MHZ = 1<<10, 612 RX_FLAG_SHORT_GI = 1<<11, 613}; 614 615/** 616 * struct ieee80211_rx_status - receive status 617 * 618 * The low-level driver should provide this information (the subset 619 * supported by hardware) to the 802.11 code with each received 620 * frame, in the skb's control buffer (cb). 621 * 622 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 623 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 624 * @band: the active band when this frame was received 625 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 626 * @signal: signal strength when receiving this frame, either in dBm, in dB or 627 * unspecified depending on the hardware capabilities flags 628 * @IEEE80211_HW_SIGNAL_* 629 * @antenna: antenna used 630 * @rate_idx: index of data rate into band's supported rates or MCS index if 631 * HT rates are use (RX_FLAG_HT) 632 * @flag: %RX_FLAG_* 633 * @rx_flags: internal RX flags for mac80211 634 */ 635struct ieee80211_rx_status { 636 u64 mactime; 637 enum ieee80211_band band; 638 int freq; 639 int signal; 640 int antenna; 641 int rate_idx; 642 int flag; 643 unsigned int rx_flags; 644}; 645 646/** 647 * enum ieee80211_conf_flags - configuration flags 648 * 649 * Flags to define PHY configuration options 650 * 651 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 652 * to determine for example whether to calculate timestamps for packets 653 * or not, do not use instead of filter flags! 654 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 655 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 656 * meaning that the hardware still wakes up for beacons, is able to 657 * transmit frames and receive the possible acknowledgment frames. 658 * Not to be confused with hardware specific wakeup/sleep states, 659 * driver is responsible for that. See the section "Powersave support" 660 * for more. 661 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 662 * the driver should be prepared to handle configuration requests but 663 * may turn the device off as much as possible. Typically, this flag will 664 * be set when an interface is set UP but not associated or scanning, but 665 * it can also be unset in that case when monitor interfaces are active. 666 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 667 * operating channel. 668 */ 669enum ieee80211_conf_flags { 670 IEEE80211_CONF_MONITOR = (1<<0), 671 IEEE80211_CONF_PS = (1<<1), 672 IEEE80211_CONF_IDLE = (1<<2), 673 IEEE80211_CONF_OFFCHANNEL = (1<<3), 674}; 675 676 677/** 678 * enum ieee80211_conf_changed - denotes which configuration changed 679 * 680 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 681 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 682 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 683 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 684 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 685 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 686 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 687 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 688 */ 689enum ieee80211_conf_changed { 690 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 691 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 692 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 693 IEEE80211_CONF_CHANGE_PS = BIT(4), 694 IEEE80211_CONF_CHANGE_POWER = BIT(5), 695 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 696 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 697 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 698}; 699 700/** 701 * enum ieee80211_smps_mode - spatial multiplexing power save mode 702 * 703 * @IEEE80211_SMPS_AUTOMATIC: automatic 704 * @IEEE80211_SMPS_OFF: off 705 * @IEEE80211_SMPS_STATIC: static 706 * @IEEE80211_SMPS_DYNAMIC: dynamic 707 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 708 */ 709enum ieee80211_smps_mode { 710 IEEE80211_SMPS_AUTOMATIC, 711 IEEE80211_SMPS_OFF, 712 IEEE80211_SMPS_STATIC, 713 IEEE80211_SMPS_DYNAMIC, 714 715 /* keep last */ 716 IEEE80211_SMPS_NUM_MODES, 717}; 718 719/** 720 * struct ieee80211_conf - configuration of the device 721 * 722 * This struct indicates how the driver shall configure the hardware. 723 * 724 * @flags: configuration flags defined above 725 * 726 * @listen_interval: listen interval in units of beacon interval 727 * @max_sleep_period: the maximum number of beacon intervals to sleep for 728 * before checking the beacon for a TIM bit (managed mode only); this 729 * value will be only achievable between DTIM frames, the hardware 730 * needs to check for the multicast traffic bit in DTIM beacons. 731 * This variable is valid only when the CONF_PS flag is set. 732 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 733 * in power saving. Power saving will not be enabled until a beacon 734 * has been received and the DTIM period is known. 735 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 736 * powersave documentation below. This variable is valid only when 737 * the CONF_PS flag is set. 738 * 739 * @power_level: requested transmit power (in dBm) 740 * 741 * @channel: the channel to tune to 742 * @channel_type: the channel (HT) type 743 * 744 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 745 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 746 * but actually means the number of transmissions not the number of retries 747 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 748 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 749 * number of transmissions not the number of retries 750 * 751 * @smps_mode: spatial multiplexing powersave mode; note that 752 * %IEEE80211_SMPS_STATIC is used when the device is not 753 * configured for an HT channel 754 */ 755struct ieee80211_conf { 756 u32 flags; 757 int power_level, dynamic_ps_timeout; 758 int max_sleep_period; 759 760 u16 listen_interval; 761 u8 ps_dtim_period; 762 763 u8 long_frame_max_tx_count, short_frame_max_tx_count; 764 765 struct ieee80211_channel *channel; 766 enum nl80211_channel_type channel_type; 767 enum ieee80211_smps_mode smps_mode; 768}; 769 770/** 771 * struct ieee80211_channel_switch - holds the channel switch data 772 * 773 * The information provided in this structure is required for channel switch 774 * operation. 775 * 776 * @timestamp: value in microseconds of the 64-bit Time Synchronization 777 * Function (TSF) timer when the frame containing the channel switch 778 * announcement was received. This is simply the rx.mactime parameter 779 * the driver passed into mac80211. 780 * @block_tx: Indicates whether transmission must be blocked before the 781 * scheduled channel switch, as indicated by the AP. 782 * @channel: the new channel to switch to 783 * @count: the number of TBTT's until the channel switch event 784 */ 785struct ieee80211_channel_switch { 786 u64 timestamp; 787 bool block_tx; 788 struct ieee80211_channel *channel; 789 u8 count; 790}; 791 792/** 793 * struct ieee80211_vif - per-interface data 794 * 795 * Data in this structure is continually present for driver 796 * use during the life of a virtual interface. 797 * 798 * @type: type of this virtual interface 799 * @bss_conf: BSS configuration for this interface, either our own 800 * or the BSS we're associated to 801 * @addr: address of this interface 802 * @p2p: indicates whether this AP or STA interface is a p2p 803 * interface, i.e. a GO or p2p-sta respectively 804 * @drv_priv: data area for driver use, will always be aligned to 805 * sizeof(void *). 806 */ 807struct ieee80211_vif { 808 enum nl80211_iftype type; 809 struct ieee80211_bss_conf bss_conf; 810 u8 addr[ETH_ALEN]; 811 bool p2p; 812 /* must be last */ 813 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 814}; 815 816static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 817{ 818#ifdef CONFIG_MAC80211_MESH 819 return vif->type == NL80211_IFTYPE_MESH_POINT; 820#endif 821 return false; 822} 823 824/** 825 * enum ieee80211_key_flags - key flags 826 * 827 * These flags are used for communication about keys between the driver 828 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 829 * 830 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 831 * that the STA this key will be used with could be using QoS. 832 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 833 * driver to indicate that it requires IV generation for this 834 * particular key. 835 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 836 * the driver for a TKIP key if it requires Michael MIC 837 * generation in software. 838 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 839 * that the key is pairwise rather then a shared key. 840 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 841 * CCMP key if it requires CCMP encryption of management frames (MFP) to 842 * be done in software. 843 */ 844enum ieee80211_key_flags { 845 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 846 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 847 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 848 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 849 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 850}; 851 852/** 853 * struct ieee80211_key_conf - key information 854 * 855 * This key information is given by mac80211 to the driver by 856 * the set_key() callback in &struct ieee80211_ops. 857 * 858 * @hw_key_idx: To be set by the driver, this is the key index the driver 859 * wants to be given when a frame is transmitted and needs to be 860 * encrypted in hardware. 861 * @cipher: The key's cipher suite selector. 862 * @flags: key flags, see &enum ieee80211_key_flags. 863 * @keyidx: the key index (0-3) 864 * @keylen: key material length 865 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 866 * data block: 867 * - Temporal Encryption Key (128 bits) 868 * - Temporal Authenticator Tx MIC Key (64 bits) 869 * - Temporal Authenticator Rx MIC Key (64 bits) 870 * @icv_len: The ICV length for this key type 871 * @iv_len: The IV length for this key type 872 */ 873struct ieee80211_key_conf { 874 u32 cipher; 875 u8 icv_len; 876 u8 iv_len; 877 u8 hw_key_idx; 878 u8 flags; 879 s8 keyidx; 880 u8 keylen; 881 u8 key[0]; 882}; 883 884/** 885 * enum set_key_cmd - key command 886 * 887 * Used with the set_key() callback in &struct ieee80211_ops, this 888 * indicates whether a key is being removed or added. 889 * 890 * @SET_KEY: a key is set 891 * @DISABLE_KEY: a key must be disabled 892 */ 893enum set_key_cmd { 894 SET_KEY, DISABLE_KEY, 895}; 896 897/** 898 * struct ieee80211_sta - station table entry 899 * 900 * A station table entry represents a station we are possibly 901 * communicating with. Since stations are RCU-managed in 902 * mac80211, any ieee80211_sta pointer you get access to must 903 * either be protected by rcu_read_lock() explicitly or implicitly, 904 * or you must take good care to not use such a pointer after a 905 * call to your sta_remove callback that removed it. 906 * 907 * @addr: MAC address 908 * @aid: AID we assigned to the station if we're an AP 909 * @supp_rates: Bitmap of supported rates (per band) 910 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 911 * @drv_priv: data area for driver use, will always be aligned to 912 * sizeof(void *), size is determined in hw information. 913 */ 914struct ieee80211_sta { 915 u32 supp_rates[IEEE80211_NUM_BANDS]; 916 u8 addr[ETH_ALEN]; 917 u16 aid; 918 struct ieee80211_sta_ht_cap ht_cap; 919 920 /* must be last */ 921 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 922}; 923 924/** 925 * enum sta_notify_cmd - sta notify command 926 * 927 * Used with the sta_notify() callback in &struct ieee80211_ops, this 928 * indicates if an associated station made a power state transition. 929 * 930 * @STA_NOTIFY_SLEEP: a station is now sleeping 931 * @STA_NOTIFY_AWAKE: a sleeping station woke up 932 */ 933enum sta_notify_cmd { 934 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 935}; 936 937/** 938 * enum ieee80211_tkip_key_type - get tkip key 939 * 940 * Used by drivers which need to get a tkip key for skb. Some drivers need a 941 * phase 1 key, others need a phase 2 key. A single function allows the driver 942 * to get the key, this enum indicates what type of key is required. 943 * 944 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 945 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 946 */ 947enum ieee80211_tkip_key_type { 948 IEEE80211_TKIP_P1_KEY, 949 IEEE80211_TKIP_P2_KEY, 950}; 951 952/** 953 * enum ieee80211_hw_flags - hardware flags 954 * 955 * These flags are used to indicate hardware capabilities to 956 * the stack. Generally, flags here should have their meaning 957 * done in a way that the simplest hardware doesn't need setting 958 * any particular flags. There are some exceptions to this rule, 959 * however, so you are advised to review these flags carefully. 960 * 961 * @IEEE80211_HW_HAS_RATE_CONTROL: 962 * The hardware or firmware includes rate control, and cannot be 963 * controlled by the stack. As such, no rate control algorithm 964 * should be instantiated, and the TX rate reported to userspace 965 * will be taken from the TX status instead of the rate control 966 * algorithm. 967 * Note that this requires that the driver implement a number of 968 * callbacks so it has the correct information, it needs to have 969 * the @set_rts_threshold callback and must look at the BSS config 970 * @use_cts_prot for G/N protection, @use_short_slot for slot 971 * timing in 2.4 GHz and @use_short_preamble for preambles for 972 * CCK frames. 973 * 974 * @IEEE80211_HW_RX_INCLUDES_FCS: 975 * Indicates that received frames passed to the stack include 976 * the FCS at the end. 977 * 978 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 979 * Some wireless LAN chipsets buffer broadcast/multicast frames 980 * for power saving stations in the hardware/firmware and others 981 * rely on the host system for such buffering. This option is used 982 * to configure the IEEE 802.11 upper layer to buffer broadcast and 983 * multicast frames when there are power saving stations so that 984 * the driver can fetch them with ieee80211_get_buffered_bc(). 985 * 986 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 987 * Hardware is not capable of short slot operation on the 2.4 GHz band. 988 * 989 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 990 * Hardware is not capable of receiving frames with short preamble on 991 * the 2.4 GHz band. 992 * 993 * @IEEE80211_HW_SIGNAL_UNSPEC: 994 * Hardware can provide signal values but we don't know its units. We 995 * expect values between 0 and @max_signal. 996 * If possible please provide dB or dBm instead. 997 * 998 * @IEEE80211_HW_SIGNAL_DBM: 999 * Hardware gives signal values in dBm, decibel difference from 1000 * one milliwatt. This is the preferred method since it is standardized 1001 * between different devices. @max_signal does not need to be set. 1002 * 1003 * @IEEE80211_HW_SPECTRUM_MGMT: 1004 * Hardware supports spectrum management defined in 802.11h 1005 * Measurement, Channel Switch, Quieting, TPC 1006 * 1007 * @IEEE80211_HW_AMPDU_AGGREGATION: 1008 * Hardware supports 11n A-MPDU aggregation. 1009 * 1010 * @IEEE80211_HW_SUPPORTS_PS: 1011 * Hardware has power save support (i.e. can go to sleep). 1012 * 1013 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1014 * Hardware requires nullfunc frame handling in stack, implies 1015 * stack support for dynamic PS. 1016 * 1017 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1018 * Hardware has support for dynamic PS. 1019 * 1020 * @IEEE80211_HW_MFP_CAPABLE: 1021 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1022 * 1023 * @IEEE80211_HW_BEACON_FILTER: 1024 * Hardware supports dropping of irrelevant beacon frames to 1025 * avoid waking up cpu. 1026 * 1027 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1028 * Hardware supports static spatial multiplexing powersave, 1029 * ie. can turn off all but one chain even on HT connections 1030 * that should be using more chains. 1031 * 1032 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1033 * Hardware supports dynamic spatial multiplexing powersave, 1034 * ie. can turn off all but one chain and then wake the rest 1035 * up as required after, for example, rts/cts handshake. 1036 * 1037 * @IEEE80211_HW_SUPPORTS_UAPSD: 1038 * Hardware supports Unscheduled Automatic Power Save Delivery 1039 * (U-APSD) in managed mode. The mode is configured with 1040 * conf_tx() operation. 1041 * 1042 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1043 * Hardware can provide ack status reports of Tx frames to 1044 * the stack. 1045 * 1046 * @IEEE80211_HW_CONNECTION_MONITOR: 1047 * The hardware performs its own connection monitoring, including 1048 * periodic keep-alives to the AP and probing the AP on beacon loss. 1049 * When this flag is set, signaling beacon-loss will cause an immediate 1050 * change to disassociated state. 1051 * 1052 * @IEEE80211_HW_SUPPORTS_CQM_RSSI: 1053 * Hardware can do connection quality monitoring - i.e. it can monitor 1054 * connection quality related parameters, such as the RSSI level and 1055 * provide notifications if configured trigger levels are reached. 1056 * 1057 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1058 * This device needs to know the DTIM period for the BSS before 1059 * associating. 1060 * 1061 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1062 * per-station GTKs as used by IBSS RSN or during fast transition. If 1063 * the device doesn't support per-station GTKs, but can be asked not 1064 * to decrypt group addressed frames, then IBSS RSN support is still 1065 * possible but software crypto will be used. Advertise the wiphy flag 1066 * only in that case. 1067 */ 1068enum ieee80211_hw_flags { 1069 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1070 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1071 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1072 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1073 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1074 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1075 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1076 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1077 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1078 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1079 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1080 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1081 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1082 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1083 IEEE80211_HW_BEACON_FILTER = 1<<14, 1084 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1085 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1086 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1087 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1088 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1089 IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20, 1090 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1091}; 1092 1093/** 1094 * struct ieee80211_hw - hardware information and state 1095 * 1096 * This structure contains the configuration and hardware 1097 * information for an 802.11 PHY. 1098 * 1099 * @wiphy: This points to the &struct wiphy allocated for this 1100 * 802.11 PHY. You must fill in the @perm_addr and @dev 1101 * members of this structure using SET_IEEE80211_DEV() 1102 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1103 * bands (with channels, bitrates) are registered here. 1104 * 1105 * @conf: &struct ieee80211_conf, device configuration, don't use. 1106 * 1107 * @priv: pointer to private area that was allocated for driver use 1108 * along with this structure. 1109 * 1110 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1111 * 1112 * @extra_tx_headroom: headroom to reserve in each transmit skb 1113 * for use by the driver (e.g. for transmit headers.) 1114 * 1115 * @channel_change_time: time (in microseconds) it takes to change channels. 1116 * 1117 * @max_signal: Maximum value for signal (rssi) in RX information, used 1118 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1119 * 1120 * @max_listen_interval: max listen interval in units of beacon interval 1121 * that HW supports 1122 * 1123 * @queues: number of available hardware transmit queues for 1124 * data packets. WMM/QoS requires at least four, these 1125 * queues need to have configurable access parameters. 1126 * 1127 * @rate_control_algorithm: rate control algorithm for this hardware. 1128 * If unset (NULL), the default algorithm will be used. Must be 1129 * set before calling ieee80211_register_hw(). 1130 * 1131 * @vif_data_size: size (in bytes) of the drv_priv data area 1132 * within &struct ieee80211_vif. 1133 * @sta_data_size: size (in bytes) of the drv_priv data area 1134 * within &struct ieee80211_sta. 1135 * 1136 * @max_rates: maximum number of alternate rate retry stages the hw 1137 * can handle. 1138 * @max_report_rates: maximum number of alternate rate retry stages 1139 * the hw can report back. 1140 * @max_rate_tries: maximum number of tries for each stage 1141 * 1142 * @napi_weight: weight used for NAPI polling. You must specify an 1143 * appropriate value here if a napi_poll operation is provided 1144 * by your driver. 1145 */ 1146struct ieee80211_hw { 1147 struct ieee80211_conf conf; 1148 struct wiphy *wiphy; 1149 const char *rate_control_algorithm; 1150 void *priv; 1151 u32 flags; 1152 unsigned int extra_tx_headroom; 1153 int channel_change_time; 1154 int vif_data_size; 1155 int sta_data_size; 1156 int napi_weight; 1157 u16 queues; 1158 u16 max_listen_interval; 1159 s8 max_signal; 1160 u8 max_rates; 1161 u8 max_report_rates; 1162 u8 max_rate_tries; 1163}; 1164 1165/** 1166 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1167 * 1168 * @wiphy: the &struct wiphy which we want to query 1169 * 1170 * mac80211 drivers can use this to get to their respective 1171 * &struct ieee80211_hw. Drivers wishing to get to their own private 1172 * structure can then access it via hw->priv. Note that mac802111 drivers should 1173 * not use wiphy_priv() to try to get their private driver structure as this 1174 * is already used internally by mac80211. 1175 */ 1176struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1177 1178/** 1179 * SET_IEEE80211_DEV - set device for 802.11 hardware 1180 * 1181 * @hw: the &struct ieee80211_hw to set the device for 1182 * @dev: the &struct device of this 802.11 device 1183 */ 1184static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1185{ 1186 set_wiphy_dev(hw->wiphy, dev); 1187} 1188 1189/** 1190 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1191 * 1192 * @hw: the &struct ieee80211_hw to set the MAC address for 1193 * @addr: the address to set 1194 */ 1195static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1196{ 1197 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1198} 1199 1200static inline struct ieee80211_rate * 1201ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1202 const struct ieee80211_tx_info *c) 1203{ 1204 if (WARN_ON(c->control.rates[0].idx < 0)) 1205 return NULL; 1206 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1207} 1208 1209static inline struct ieee80211_rate * 1210ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1211 const struct ieee80211_tx_info *c) 1212{ 1213 if (c->control.rts_cts_rate_idx < 0) 1214 return NULL; 1215 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1216} 1217 1218static inline struct ieee80211_rate * 1219ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1220 const struct ieee80211_tx_info *c, int idx) 1221{ 1222 if (c->control.rates[idx + 1].idx < 0) 1223 return NULL; 1224 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1225} 1226 1227/** 1228 * DOC: Hardware crypto acceleration 1229 * 1230 * mac80211 is capable of taking advantage of many hardware 1231 * acceleration designs for encryption and decryption operations. 1232 * 1233 * The set_key() callback in the &struct ieee80211_ops for a given 1234 * device is called to enable hardware acceleration of encryption and 1235 * decryption. The callback takes a @sta parameter that will be NULL 1236 * for default keys or keys used for transmission only, or point to 1237 * the station information for the peer for individual keys. 1238 * Multiple transmission keys with the same key index may be used when 1239 * VLANs are configured for an access point. 1240 * 1241 * When transmitting, the TX control data will use the @hw_key_idx 1242 * selected by the driver by modifying the &struct ieee80211_key_conf 1243 * pointed to by the @key parameter to the set_key() function. 1244 * 1245 * The set_key() call for the %SET_KEY command should return 0 if 1246 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1247 * added; if you return 0 then hw_key_idx must be assigned to the 1248 * hardware key index, you are free to use the full u8 range. 1249 * 1250 * When the cmd is %DISABLE_KEY then it must succeed. 1251 * 1252 * Note that it is permissible to not decrypt a frame even if a key 1253 * for it has been uploaded to hardware, the stack will not make any 1254 * decision based on whether a key has been uploaded or not but rather 1255 * based on the receive flags. 1256 * 1257 * The &struct ieee80211_key_conf structure pointed to by the @key 1258 * parameter is guaranteed to be valid until another call to set_key() 1259 * removes it, but it can only be used as a cookie to differentiate 1260 * keys. 1261 * 1262 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1263 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1264 * handler. 1265 * The update_tkip_key() call updates the driver with the new phase 1 key. 1266 * This happens everytime the iv16 wraps around (every 65536 packets). The 1267 * set_key() call will happen only once for each key (unless the AP did 1268 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1269 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1270 * handler is software decryption with wrap around of iv16. 1271 */ 1272 1273/** 1274 * DOC: Powersave support 1275 * 1276 * mac80211 has support for various powersave implementations. 1277 * 1278 * First, it can support hardware that handles all powersaving by itself, 1279 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1280 * flag. In that case, it will be told about the desired powersave mode 1281 * with the %IEEE80211_CONF_PS flag depending on the association status. 1282 * The hardware must take care of sending nullfunc frames when necessary, 1283 * i.e. when entering and leaving powersave mode. The hardware is required 1284 * to look at the AID in beacons and signal to the AP that it woke up when 1285 * it finds traffic directed to it. 1286 * 1287 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1288 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1289 * with hardware wakeup and sleep states. Driver is responsible for waking 1290 * up the hardware before issuing commands to the hardware and putting it 1291 * back to sleep at appropriate times. 1292 * 1293 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1294 * buffered multicast/broadcast frames after the beacon. Also it must be 1295 * possible to send frames and receive the acknowledment frame. 1296 * 1297 * Other hardware designs cannot send nullfunc frames by themselves and also 1298 * need software support for parsing the TIM bitmap. This is also supported 1299 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1300 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1301 * required to pass up beacons. The hardware is still required to handle 1302 * waking up for multicast traffic; if it cannot the driver must handle that 1303 * as best as it can, mac80211 is too slow to do that. 1304 * 1305 * Dynamic powersave is an extension to normal powersave in which the 1306 * hardware stays awake for a user-specified period of time after sending a 1307 * frame so that reply frames need not be buffered and therefore delayed to 1308 * the next wakeup. It's compromise of getting good enough latency when 1309 * there's data traffic and still saving significantly power in idle 1310 * periods. 1311 * 1312 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1313 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1314 * flag and mac80211 will handle everything automatically. Additionally, 1315 * hardware having support for the dynamic PS feature may set the 1316 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1317 * dynamic PS mode itself. The driver needs to look at the 1318 * @dynamic_ps_timeout hardware configuration value and use it that value 1319 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1320 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1321 * enabled whenever user has enabled powersave. 1322 * 1323 * Some hardware need to toggle a single shared antenna between WLAN and 1324 * Bluetooth to facilitate co-existence. These types of hardware set 1325 * limitations on the use of host controlled dynamic powersave whenever there 1326 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1327 * driver may request temporarily going into full power save, in order to 1328 * enable toggling the antenna between BT and WLAN. If the driver requests 1329 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1330 * temporarily set to zero until the driver re-enables dynamic powersave. 1331 * 1332 * Driver informs U-APSD client support by enabling 1333 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1334 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1335 * Nullfunc frames and stay awake until the service period has ended. To 1336 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1337 * from that AC are transmitted with powersave enabled. 1338 * 1339 * Note: U-APSD client mode is not yet supported with 1340 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1341 */ 1342 1343/** 1344 * DOC: Beacon filter support 1345 * 1346 * Some hardware have beacon filter support to reduce host cpu wakeups 1347 * which will reduce system power consumption. It usuallly works so that 1348 * the firmware creates a checksum of the beacon but omits all constantly 1349 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1350 * beacon is forwarded to the host, otherwise it will be just dropped. That 1351 * way the host will only receive beacons where some relevant information 1352 * (for example ERP protection or WMM settings) have changed. 1353 * 1354 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER 1355 * hardware capability. The driver needs to enable beacon filter support 1356 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1357 * power save is enabled, the stack will not check for beacon loss and the 1358 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1359 * 1360 * The time (or number of beacons missed) until the firmware notifies the 1361 * driver of a beacon loss event (which in turn causes the driver to call 1362 * ieee80211_beacon_loss()) should be configurable and will be controlled 1363 * by mac80211 and the roaming algorithm in the future. 1364 * 1365 * Since there may be constantly changing information elements that nothing 1366 * in the software stack cares about, we will, in the future, have mac80211 1367 * tell the driver which information elements are interesting in the sense 1368 * that we want to see changes in them. This will include 1369 * - a list of information element IDs 1370 * - a list of OUIs for the vendor information element 1371 * 1372 * Ideally, the hardware would filter out any beacons without changes in the 1373 * requested elements, but if it cannot support that it may, at the expense 1374 * of some efficiency, filter out only a subset. For example, if the device 1375 * doesn't support checking for OUIs it should pass up all changes in all 1376 * vendor information elements. 1377 * 1378 * Note that change, for the sake of simplification, also includes information 1379 * elements appearing or disappearing from the beacon. 1380 * 1381 * Some hardware supports an "ignore list" instead, just make sure nothing 1382 * that was requested is on the ignore list, and include commonly changing 1383 * information element IDs in the ignore list, for example 11 (BSS load) and 1384 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1385 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1386 * it could also include some currently unused IDs. 1387 * 1388 * 1389 * In addition to these capabilities, hardware should support notifying the 1390 * host of changes in the beacon RSSI. This is relevant to implement roaming 1391 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1392 * the received data packets). This can consist in notifying the host when 1393 * the RSSI changes significantly or when it drops below or rises above 1394 * configurable thresholds. In the future these thresholds will also be 1395 * configured by mac80211 (which gets them from userspace) to implement 1396 * them as the roaming algorithm requires. 1397 * 1398 * If the hardware cannot implement this, the driver should ask it to 1399 * periodically pass beacon frames to the host so that software can do the 1400 * signal strength threshold checking. 1401 */ 1402 1403/** 1404 * DOC: Spatial multiplexing power save 1405 * 1406 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1407 * power in an 802.11n implementation. For details on the mechanism 1408 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1409 * "11.2.3 SM power save". 1410 * 1411 * The mac80211 implementation is capable of sending action frames 1412 * to update the AP about the station's SMPS mode, and will instruct 1413 * the driver to enter the specific mode. It will also announce the 1414 * requested SMPS mode during the association handshake. Hardware 1415 * support for this feature is required, and can be indicated by 1416 * hardware flags. 1417 * 1418 * The default mode will be "automatic", which nl80211/cfg80211 1419 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1420 * turned off otherwise. 1421 * 1422 * To support this feature, the driver must set the appropriate 1423 * hardware support flags, and handle the SMPS flag to the config() 1424 * operation. It will then with this mechanism be instructed to 1425 * enter the requested SMPS mode while associated to an HT AP. 1426 */ 1427 1428/** 1429 * DOC: Frame filtering 1430 * 1431 * mac80211 requires to see many management frames for proper 1432 * operation, and users may want to see many more frames when 1433 * in monitor mode. However, for best CPU usage and power consumption, 1434 * having as few frames as possible percolate through the stack is 1435 * desirable. Hence, the hardware should filter as much as possible. 1436 * 1437 * To achieve this, mac80211 uses filter flags (see below) to tell 1438 * the driver's configure_filter() function which frames should be 1439 * passed to mac80211 and which should be filtered out. 1440 * 1441 * Before configure_filter() is invoked, the prepare_multicast() 1442 * callback is invoked with the parameters @mc_count and @mc_list 1443 * for the combined multicast address list of all virtual interfaces. 1444 * It's use is optional, and it returns a u64 that is passed to 1445 * configure_filter(). Additionally, configure_filter() has the 1446 * arguments @changed_flags telling which flags were changed and 1447 * @total_flags with the new flag states. 1448 * 1449 * If your device has no multicast address filters your driver will 1450 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1451 * parameter to see whether multicast frames should be accepted 1452 * or dropped. 1453 * 1454 * All unsupported flags in @total_flags must be cleared. 1455 * Hardware does not support a flag if it is incapable of _passing_ 1456 * the frame to the stack. Otherwise the driver must ignore 1457 * the flag, but not clear it. 1458 * You must _only_ clear the flag (announce no support for the 1459 * flag to mac80211) if you are not able to pass the packet type 1460 * to the stack (so the hardware always filters it). 1461 * So for example, you should clear @FIF_CONTROL, if your hardware 1462 * always filters control frames. If your hardware always passes 1463 * control frames to the kernel and is incapable of filtering them, 1464 * you do _not_ clear the @FIF_CONTROL flag. 1465 * This rule applies to all other FIF flags as well. 1466 */ 1467 1468/** 1469 * enum ieee80211_filter_flags - hardware filter flags 1470 * 1471 * These flags determine what the filter in hardware should be 1472 * programmed to let through and what should not be passed to the 1473 * stack. It is always safe to pass more frames than requested, 1474 * but this has negative impact on power consumption. 1475 * 1476 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1477 * think of the BSS as your network segment and then this corresponds 1478 * to the regular ethernet device promiscuous mode. 1479 * 1480 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1481 * by the user or if the hardware is not capable of filtering by 1482 * multicast address. 1483 * 1484 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1485 * %RX_FLAG_FAILED_FCS_CRC for them) 1486 * 1487 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1488 * the %RX_FLAG_FAILED_PLCP_CRC for them 1489 * 1490 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1491 * to the hardware that it should not filter beacons or probe responses 1492 * by BSSID. Filtering them can greatly reduce the amount of processing 1493 * mac80211 needs to do and the amount of CPU wakeups, so you should 1494 * honour this flag if possible. 1495 * 1496 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1497 * is not set then only those addressed to this station. 1498 * 1499 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1500 * 1501 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1502 * those addressed to this station. 1503 * 1504 * @FIF_PROBE_REQ: pass probe request frames 1505 */ 1506enum ieee80211_filter_flags { 1507 FIF_PROMISC_IN_BSS = 1<<0, 1508 FIF_ALLMULTI = 1<<1, 1509 FIF_FCSFAIL = 1<<2, 1510 FIF_PLCPFAIL = 1<<3, 1511 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1512 FIF_CONTROL = 1<<5, 1513 FIF_OTHER_BSS = 1<<6, 1514 FIF_PSPOLL = 1<<7, 1515 FIF_PROBE_REQ = 1<<8, 1516}; 1517 1518/** 1519 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1520 * 1521 * These flags are used with the ampdu_action() callback in 1522 * &struct ieee80211_ops to indicate which action is needed. 1523 * 1524 * Note that drivers MUST be able to deal with a TX aggregation 1525 * session being stopped even before they OK'ed starting it by 1526 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1527 * might receive the addBA frame and send a delBA right away! 1528 * 1529 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1530 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1531 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1532 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1533 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1534 */ 1535enum ieee80211_ampdu_mlme_action { 1536 IEEE80211_AMPDU_RX_START, 1537 IEEE80211_AMPDU_RX_STOP, 1538 IEEE80211_AMPDU_TX_START, 1539 IEEE80211_AMPDU_TX_STOP, 1540 IEEE80211_AMPDU_TX_OPERATIONAL, 1541}; 1542 1543/** 1544 * struct ieee80211_ops - callbacks from mac80211 to the driver 1545 * 1546 * This structure contains various callbacks that the driver may 1547 * handle or, in some cases, must handle, for example to configure 1548 * the hardware to a new channel or to transmit a frame. 1549 * 1550 * @tx: Handler that 802.11 module calls for each transmitted frame. 1551 * skb contains the buffer starting from the IEEE 802.11 header. 1552 * The low-level driver should send the frame out based on 1553 * configuration in the TX control data. This handler should, 1554 * preferably, never fail and stop queues appropriately, more 1555 * importantly, however, it must never fail for A-MPDU-queues. 1556 * This function should return NETDEV_TX_OK except in very 1557 * limited cases. 1558 * Must be implemented and atomic. 1559 * 1560 * @start: Called before the first netdevice attached to the hardware 1561 * is enabled. This should turn on the hardware and must turn on 1562 * frame reception (for possibly enabled monitor interfaces.) 1563 * Returns negative error codes, these may be seen in userspace, 1564 * or zero. 1565 * When the device is started it should not have a MAC address 1566 * to avoid acknowledging frames before a non-monitor device 1567 * is added. 1568 * Must be implemented and can sleep. 1569 * 1570 * @stop: Called after last netdevice attached to the hardware 1571 * is disabled. This should turn off the hardware (at least 1572 * it must turn off frame reception.) 1573 * May be called right after add_interface if that rejects 1574 * an interface. If you added any work onto the mac80211 workqueue 1575 * you should ensure to cancel it on this callback. 1576 * Must be implemented and can sleep. 1577 * 1578 * @add_interface: Called when a netdevice attached to the hardware is 1579 * enabled. Because it is not called for monitor mode devices, @start 1580 * and @stop must be implemented. 1581 * The driver should perform any initialization it needs before 1582 * the device can be enabled. The initial configuration for the 1583 * interface is given in the conf parameter. 1584 * The callback may refuse to add an interface by returning a 1585 * negative error code (which will be seen in userspace.) 1586 * Must be implemented and can sleep. 1587 * 1588 * @change_interface: Called when a netdevice changes type. This callback 1589 * is optional, but only if it is supported can interface types be 1590 * switched while the interface is UP. The callback may sleep. 1591 * Note that while an interface is being switched, it will not be 1592 * found by the interface iteration callbacks. 1593 * 1594 * @remove_interface: Notifies a driver that an interface is going down. 1595 * The @stop callback is called after this if it is the last interface 1596 * and no monitor interfaces are present. 1597 * When all interfaces are removed, the MAC address in the hardware 1598 * must be cleared so the device no longer acknowledges packets, 1599 * the mac_addr member of the conf structure is, however, set to the 1600 * MAC address of the device going away. 1601 * Hence, this callback must be implemented. It can sleep. 1602 * 1603 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1604 * function to change hardware configuration, e.g., channel. 1605 * This function should never fail but returns a negative error code 1606 * if it does. The callback can sleep. 1607 * 1608 * @bss_info_changed: Handler for configuration requests related to BSS 1609 * parameters that may vary during BSS's lifespan, and may affect low 1610 * level driver (e.g. assoc/disassoc status, erp parameters). 1611 * This function should not be used if no BSS has been set, unless 1612 * for association indication. The @changed parameter indicates which 1613 * of the bss parameters has changed when a call is made. The callback 1614 * can sleep. 1615 * 1616 * @prepare_multicast: Prepare for multicast filter configuration. 1617 * This callback is optional, and its return value is passed 1618 * to configure_filter(). This callback must be atomic. 1619 * 1620 * @configure_filter: Configure the device's RX filter. 1621 * See the section "Frame filtering" for more information. 1622 * This callback must be implemented and can sleep. 1623 * 1624 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1625 * must be set or cleared for a given STA. Must be atomic. 1626 * 1627 * @set_key: See the section "Hardware crypto acceleration" 1628 * This callback is only called between add_interface and 1629 * remove_interface calls, i.e. while the given virtual interface 1630 * is enabled. 1631 * Returns a negative error code if the key can't be added. 1632 * The callback can sleep. 1633 * 1634 * @update_tkip_key: See the section "Hardware crypto acceleration" 1635 * This callback will be called in the context of Rx. Called for drivers 1636 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1637 * The callback must be atomic. 1638 * 1639 * @hw_scan: Ask the hardware to service the scan request, no need to start 1640 * the scan state machine in stack. The scan must honour the channel 1641 * configuration done by the regulatory agent in the wiphy's 1642 * registered bands. The hardware (or the driver) needs to make sure 1643 * that power save is disabled. 1644 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1645 * entire IEs after the SSID, so that drivers need not look at these 1646 * at all but just send them after the SSID -- mac80211 includes the 1647 * (extended) supported rates and HT information (where applicable). 1648 * When the scan finishes, ieee80211_scan_completed() must be called; 1649 * note that it also must be called when the scan cannot finish due to 1650 * any error unless this callback returned a negative error code. 1651 * The callback can sleep. 1652 * 1653 * @sw_scan_start: Notifier function that is called just before a software scan 1654 * is started. Can be NULL, if the driver doesn't need this notification. 1655 * The callback can sleep. 1656 * 1657 * @sw_scan_complete: Notifier function that is called just after a 1658 * software scan finished. Can be NULL, if the driver doesn't need 1659 * this notification. 1660 * The callback can sleep. 1661 * 1662 * @get_stats: Return low-level statistics. 1663 * Returns zero if statistics are available. 1664 * The callback can sleep. 1665 * 1666 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1667 * callback should be provided to read the TKIP transmit IVs (both IV32 1668 * and IV16) for the given key from hardware. 1669 * The callback must be atomic. 1670 * 1671 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 1672 * if the device does fragmentation by itself; if this callback is 1673 * implemented then the stack will not do fragmentation. 1674 * The callback can sleep. 1675 * 1676 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1677 * The callback can sleep. 1678 * 1679 * @sta_add: Notifies low level driver about addition of an associated station, 1680 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1681 * 1682 * @sta_remove: Notifies low level driver about removal of an associated 1683 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1684 * 1685 * @sta_notify: Notifies low level driver about power state transition of an 1686 * associated station, AP, IBSS/WDS/mesh peer etc. Must be atomic. 1687 * 1688 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1689 * bursting) for a hardware TX queue. 1690 * Returns a negative error code on failure. 1691 * The callback can sleep. 1692 * 1693 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1694 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1695 * required function. 1696 * The callback can sleep. 1697 * 1698 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1699 * Currently, this is only used for IBSS mode debugging. Is not a 1700 * required function. 1701 * The callback can sleep. 1702 * 1703 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1704 * with other STAs in the IBSS. This is only used in IBSS mode. This 1705 * function is optional if the firmware/hardware takes full care of 1706 * TSF synchronization. 1707 * The callback can sleep. 1708 * 1709 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1710 * This is needed only for IBSS mode and the result of this function is 1711 * used to determine whether to reply to Probe Requests. 1712 * Returns non-zero if this device sent the last beacon. 1713 * The callback can sleep. 1714 * 1715 * @ampdu_action: Perform a certain A-MPDU action 1716 * The RA/TID combination determines the destination and TID we want 1717 * the ampdu action to be performed for. The action is defined through 1718 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1719 * is the first frame we expect to perform the action on. Notice 1720 * that TX/RX_STOP can pass NULL for this parameter. 1721 * Returns a negative error code on failure. 1722 * The callback can sleep. 1723 * 1724 * @get_survey: Return per-channel survey information 1725 * 1726 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 1727 * need to set wiphy->rfkill_poll to %true before registration, 1728 * and need to call wiphy_rfkill_set_hw_state() in the callback. 1729 * The callback can sleep. 1730 * 1731 * @set_coverage_class: Set slot time for given coverage class as specified 1732 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 1733 * accordingly. This callback is not required and may sleep. 1734 * 1735 * @testmode_cmd: Implement a cfg80211 test mode command. 1736 * The callback can sleep. 1737 * 1738 * @flush: Flush all pending frames from the hardware queue, making sure 1739 * that the hardware queues are empty. If the parameter @drop is set 1740 * to %true, pending frames may be dropped. The callback can sleep. 1741 * 1742 * @channel_switch: Drivers that need (or want) to offload the channel 1743 * switch operation for CSAs received from the AP may implement this 1744 * callback. They must then call ieee80211_chswitch_done() to indicate 1745 * completion of the channel switch. 1746 * 1747 * @napi_poll: Poll Rx queue for incoming data frames. 1748 */ 1749struct ieee80211_ops { 1750 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1751 int (*start)(struct ieee80211_hw *hw); 1752 void (*stop)(struct ieee80211_hw *hw); 1753 int (*add_interface)(struct ieee80211_hw *hw, 1754 struct ieee80211_vif *vif); 1755 int (*change_interface)(struct ieee80211_hw *hw, 1756 struct ieee80211_vif *vif, 1757 enum nl80211_iftype new_type, bool p2p); 1758 void (*remove_interface)(struct ieee80211_hw *hw, 1759 struct ieee80211_vif *vif); 1760 int (*config)(struct ieee80211_hw *hw, u32 changed); 1761 void (*bss_info_changed)(struct ieee80211_hw *hw, 1762 struct ieee80211_vif *vif, 1763 struct ieee80211_bss_conf *info, 1764 u32 changed); 1765 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 1766 struct netdev_hw_addr_list *mc_list); 1767 void (*configure_filter)(struct ieee80211_hw *hw, 1768 unsigned int changed_flags, 1769 unsigned int *total_flags, 1770 u64 multicast); 1771 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1772 bool set); 1773 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1774 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 1775 struct ieee80211_key_conf *key); 1776 void (*update_tkip_key)(struct ieee80211_hw *hw, 1777 struct ieee80211_vif *vif, 1778 struct ieee80211_key_conf *conf, 1779 struct ieee80211_sta *sta, 1780 u32 iv32, u16 *phase1key); 1781 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1782 struct cfg80211_scan_request *req); 1783 void (*sw_scan_start)(struct ieee80211_hw *hw); 1784 void (*sw_scan_complete)(struct ieee80211_hw *hw); 1785 int (*get_stats)(struct ieee80211_hw *hw, 1786 struct ieee80211_low_level_stats *stats); 1787 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1788 u32 *iv32, u16 *iv16); 1789 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 1790 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1791 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1792 struct ieee80211_sta *sta); 1793 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1794 struct ieee80211_sta *sta); 1795 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1796 enum sta_notify_cmd, struct ieee80211_sta *sta); 1797 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1798 const struct ieee80211_tx_queue_params *params); 1799 u64 (*get_tsf)(struct ieee80211_hw *hw); 1800 void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); 1801 void (*reset_tsf)(struct ieee80211_hw *hw); 1802 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1803 int (*ampdu_action)(struct ieee80211_hw *hw, 1804 struct ieee80211_vif *vif, 1805 enum ieee80211_ampdu_mlme_action action, 1806 struct ieee80211_sta *sta, u16 tid, u16 *ssn); 1807 int (*get_survey)(struct ieee80211_hw *hw, int idx, 1808 struct survey_info *survey); 1809 void (*rfkill_poll)(struct ieee80211_hw *hw); 1810 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 1811#ifdef CONFIG_NL80211_TESTMODE 1812 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 1813#endif 1814 void (*flush)(struct ieee80211_hw *hw, bool drop); 1815 void (*channel_switch)(struct ieee80211_hw *hw, 1816 struct ieee80211_channel_switch *ch_switch); 1817 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 1818 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 1819 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 1820}; 1821 1822/** 1823 * ieee80211_alloc_hw - Allocate a new hardware device 1824 * 1825 * This must be called once for each hardware device. The returned pointer 1826 * must be used to refer to this device when calling other functions. 1827 * mac80211 allocates a private data area for the driver pointed to by 1828 * @priv in &struct ieee80211_hw, the size of this area is given as 1829 * @priv_data_len. 1830 * 1831 * @priv_data_len: length of private data 1832 * @ops: callbacks for this device 1833 */ 1834struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1835 const struct ieee80211_ops *ops); 1836 1837/** 1838 * ieee80211_register_hw - Register hardware device 1839 * 1840 * You must call this function before any other functions in 1841 * mac80211. Note that before a hardware can be registered, you 1842 * need to fill the contained wiphy's information. 1843 * 1844 * @hw: the device to register as returned by ieee80211_alloc_hw() 1845 */ 1846int ieee80211_register_hw(struct ieee80211_hw *hw); 1847 1848#ifdef CONFIG_MAC80211_LEDS 1849extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1850extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1851extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1852extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1853#endif 1854/** 1855 * ieee80211_get_tx_led_name - get name of TX LED 1856 * 1857 * mac80211 creates a transmit LED trigger for each wireless hardware 1858 * that can be used to drive LEDs if your driver registers a LED device. 1859 * This function returns the name (or %NULL if not configured for LEDs) 1860 * of the trigger so you can automatically link the LED device. 1861 * 1862 * @hw: the hardware to get the LED trigger name for 1863 */ 1864static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1865{ 1866#ifdef CONFIG_MAC80211_LEDS 1867 return __ieee80211_get_tx_led_name(hw); 1868#else 1869 return NULL; 1870#endif 1871} 1872 1873/** 1874 * ieee80211_get_rx_led_name - get name of RX LED 1875 * 1876 * mac80211 creates a receive LED trigger for each wireless hardware 1877 * that can be used to drive LEDs if your driver registers a LED device. 1878 * This function returns the name (or %NULL if not configured for LEDs) 1879 * of the trigger so you can automatically link the LED device. 1880 * 1881 * @hw: the hardware to get the LED trigger name for 1882 */ 1883static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1884{ 1885#ifdef CONFIG_MAC80211_LEDS 1886 return __ieee80211_get_rx_led_name(hw); 1887#else 1888 return NULL; 1889#endif 1890} 1891 1892/** 1893 * ieee80211_get_assoc_led_name - get name of association LED 1894 * 1895 * mac80211 creates a association LED trigger for each wireless hardware 1896 * that can be used to drive LEDs if your driver registers a LED device. 1897 * This function returns the name (or %NULL if not configured for LEDs) 1898 * of the trigger so you can automatically link the LED device. 1899 * 1900 * @hw: the hardware to get the LED trigger name for 1901 */ 1902static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1903{ 1904#ifdef CONFIG_MAC80211_LEDS 1905 return __ieee80211_get_assoc_led_name(hw); 1906#else 1907 return NULL; 1908#endif 1909} 1910 1911/** 1912 * ieee80211_get_radio_led_name - get name of radio LED 1913 * 1914 * mac80211 creates a radio change LED trigger for each wireless hardware 1915 * that can be used to drive LEDs if your driver registers a LED device. 1916 * This function returns the name (or %NULL if not configured for LEDs) 1917 * of the trigger so you can automatically link the LED device. 1918 * 1919 * @hw: the hardware to get the LED trigger name for 1920 */ 1921static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1922{ 1923#ifdef CONFIG_MAC80211_LEDS 1924 return __ieee80211_get_radio_led_name(hw); 1925#else 1926 return NULL; 1927#endif 1928} 1929 1930/** 1931 * ieee80211_unregister_hw - Unregister a hardware device 1932 * 1933 * This function instructs mac80211 to free allocated resources 1934 * and unregister netdevices from the networking subsystem. 1935 * 1936 * @hw: the hardware to unregister 1937 */ 1938void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1939 1940/** 1941 * ieee80211_free_hw - free hardware descriptor 1942 * 1943 * This function frees everything that was allocated, including the 1944 * private data for the driver. You must call ieee80211_unregister_hw() 1945 * before calling this function. 1946 * 1947 * @hw: the hardware to free 1948 */ 1949void ieee80211_free_hw(struct ieee80211_hw *hw); 1950 1951/** 1952 * ieee80211_restart_hw - restart hardware completely 1953 * 1954 * Call this function when the hardware was restarted for some reason 1955 * (hardware error, ...) and the driver is unable to restore its state 1956 * by itself. mac80211 assumes that at this point the driver/hardware 1957 * is completely uninitialised and stopped, it starts the process by 1958 * calling the ->start() operation. The driver will need to reset all 1959 * internal state that it has prior to calling this function. 1960 * 1961 * @hw: the hardware to restart 1962 */ 1963void ieee80211_restart_hw(struct ieee80211_hw *hw); 1964 1965/** ieee80211_napi_schedule - schedule NAPI poll 1966 * 1967 * Use this function to schedule NAPI polling on a device. 1968 * 1969 * @hw: the hardware to start polling 1970 */ 1971void ieee80211_napi_schedule(struct ieee80211_hw *hw); 1972 1973/** ieee80211_napi_complete - complete NAPI polling 1974 * 1975 * Use this function to finish NAPI polling on a device. 1976 * 1977 * @hw: the hardware to stop polling 1978 */ 1979void ieee80211_napi_complete(struct ieee80211_hw *hw); 1980 1981/** 1982 * ieee80211_rx - receive frame 1983 * 1984 * Use this function to hand received frames to mac80211. The receive 1985 * buffer in @skb must start with an IEEE 802.11 header. In case of a 1986 * paged @skb is used, the driver is recommended to put the ieee80211 1987 * header of the frame on the linear part of the @skb to avoid memory 1988 * allocation and/or memcpy by the stack. 1989 * 1990 * This function may not be called in IRQ context. Calls to this function 1991 * for a single hardware must be synchronized against each other. Calls to 1992 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 1993 * mixed for a single hardware. 1994 * 1995 * In process context use instead ieee80211_rx_ni(). 1996 * 1997 * @hw: the hardware this frame came in on 1998 * @skb: the buffer to receive, owned by mac80211 after this call 1999 */ 2000void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2001 2002/** 2003 * ieee80211_rx_irqsafe - receive frame 2004 * 2005 * Like ieee80211_rx() but can be called in IRQ context 2006 * (internally defers to a tasklet.) 2007 * 2008 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2009 * be mixed for a single hardware. 2010 * 2011 * @hw: the hardware this frame came in on 2012 * @skb: the buffer to receive, owned by mac80211 after this call 2013 */ 2014void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2015 2016/** 2017 * ieee80211_rx_ni - receive frame (in process context) 2018 * 2019 * Like ieee80211_rx() but can be called in process context 2020 * (internally disables bottom halves). 2021 * 2022 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2023 * not be mixed for a single hardware. 2024 * 2025 * @hw: the hardware this frame came in on 2026 * @skb: the buffer to receive, owned by mac80211 after this call 2027 */ 2028static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2029 struct sk_buff *skb) 2030{ 2031 local_bh_disable(); 2032 ieee80211_rx(hw, skb); 2033 local_bh_enable(); 2034} 2035 2036/* 2037 * The TX headroom reserved by mac80211 for its own tx_status functions. 2038 * This is enough for the radiotap header. 2039 */ 2040#define IEEE80211_TX_STATUS_HEADROOM 13 2041 2042/** 2043 * ieee80211_tx_status - transmit status callback 2044 * 2045 * Call this function for all transmitted frames after they have been 2046 * transmitted. It is permissible to not call this function for 2047 * multicast frames but this can affect statistics. 2048 * 2049 * This function may not be called in IRQ context. Calls to this function 2050 * for a single hardware must be synchronized against each other. Calls 2051 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 2052 * for a single hardware. 2053 * 2054 * @hw: the hardware the frame was transmitted by 2055 * @skb: the frame that was transmitted, owned by mac80211 after this call 2056 */ 2057void ieee80211_tx_status(struct ieee80211_hw *hw, 2058 struct sk_buff *skb); 2059 2060/** 2061 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 2062 * 2063 * Like ieee80211_tx_status() but can be called in IRQ context 2064 * (internally defers to a tasklet.) 2065 * 2066 * Calls to this function and ieee80211_tx_status() may not be mixed for a 2067 * single hardware. 2068 * 2069 * @hw: the hardware the frame was transmitted by 2070 * @skb: the frame that was transmitted, owned by mac80211 after this call 2071 */ 2072void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2073 struct sk_buff *skb); 2074 2075/** 2076 * ieee80211_beacon_get_tim - beacon generation function 2077 * @hw: pointer obtained from ieee80211_alloc_hw(). 2078 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2079 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2080 * Set to 0 if invalid (in non-AP modes). 2081 * @tim_length: pointer to variable that will receive the TIM IE length, 2082 * (including the ID and length bytes!). 2083 * Set to 0 if invalid (in non-AP modes). 2084 * 2085 * If the driver implements beaconing modes, it must use this function to 2086 * obtain the beacon frame/template. 2087 * 2088 * If the beacon frames are generated by the host system (i.e., not in 2089 * hardware/firmware), the driver uses this function to get each beacon 2090 * frame from mac80211 -- it is responsible for calling this function 2091 * before the beacon is needed (e.g. based on hardware interrupt). 2092 * 2093 * If the beacon frames are generated by the device, then the driver 2094 * must use the returned beacon as the template and change the TIM IE 2095 * according to the current DTIM parameters/TIM bitmap. 2096 * 2097 * The driver is responsible for freeing the returned skb. 2098 */ 2099struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2100 struct ieee80211_vif *vif, 2101 u16 *tim_offset, u16 *tim_length); 2102 2103/** 2104 * ieee80211_beacon_get - beacon generation function 2105 * @hw: pointer obtained from ieee80211_alloc_hw(). 2106 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2107 * 2108 * See ieee80211_beacon_get_tim(). 2109 */ 2110static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2111 struct ieee80211_vif *vif) 2112{ 2113 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2114} 2115 2116/** 2117 * ieee80211_pspoll_get - retrieve a PS Poll template 2118 * @hw: pointer obtained from ieee80211_alloc_hw(). 2119 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2120 * 2121 * Creates a PS Poll a template which can, for example, uploaded to 2122 * hardware. The template must be updated after association so that correct 2123 * AID, BSSID and MAC address is used. 2124 * 2125 * Note: Caller (or hardware) is responsible for setting the 2126 * &IEEE80211_FCTL_PM bit. 2127 */ 2128struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2129 struct ieee80211_vif *vif); 2130 2131/** 2132 * ieee80211_nullfunc_get - retrieve a nullfunc template 2133 * @hw: pointer obtained from ieee80211_alloc_hw(). 2134 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2135 * 2136 * Creates a Nullfunc template which can, for example, uploaded to 2137 * hardware. The template must be updated after association so that correct 2138 * BSSID and address is used. 2139 * 2140 * Note: Caller (or hardware) is responsible for setting the 2141 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2142 */ 2143struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2144 struct ieee80211_vif *vif); 2145 2146/** 2147 * ieee80211_probereq_get - retrieve a Probe Request template 2148 * @hw: pointer obtained from ieee80211_alloc_hw(). 2149 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2150 * @ssid: SSID buffer 2151 * @ssid_len: length of SSID 2152 * @ie: buffer containing all IEs except SSID for the template 2153 * @ie_len: length of the IE buffer 2154 * 2155 * Creates a Probe Request template which can, for example, be uploaded to 2156 * hardware. 2157 */ 2158struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2159 struct ieee80211_vif *vif, 2160 const u8 *ssid, size_t ssid_len, 2161 const u8 *ie, size_t ie_len); 2162 2163/** 2164 * ieee80211_rts_get - RTS frame generation function 2165 * @hw: pointer obtained from ieee80211_alloc_hw(). 2166 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2167 * @frame: pointer to the frame that is going to be protected by the RTS. 2168 * @frame_len: the frame length (in octets). 2169 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2170 * @rts: The buffer where to store the RTS frame. 2171 * 2172 * If the RTS frames are generated by the host system (i.e., not in 2173 * hardware/firmware), the low-level driver uses this function to receive 2174 * the next RTS frame from the 802.11 code. The low-level is responsible 2175 * for calling this function before and RTS frame is needed. 2176 */ 2177void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2178 const void *frame, size_t frame_len, 2179 const struct ieee80211_tx_info *frame_txctl, 2180 struct ieee80211_rts *rts); 2181 2182/** 2183 * ieee80211_rts_duration - Get the duration field for an RTS frame 2184 * @hw: pointer obtained from ieee80211_alloc_hw(). 2185 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2186 * @frame_len: the length of the frame that is going to be protected by the RTS. 2187 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2188 * 2189 * If the RTS is generated in firmware, but the host system must provide 2190 * the duration field, the low-level driver uses this function to receive 2191 * the duration field value in little-endian byteorder. 2192 */ 2193__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2194 struct ieee80211_vif *vif, size_t frame_len, 2195 const struct ieee80211_tx_info *frame_txctl); 2196 2197/** 2198 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2199 * @hw: pointer obtained from ieee80211_alloc_hw(). 2200 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2201 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2202 * @frame_len: the frame length (in octets). 2203 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2204 * @cts: The buffer where to store the CTS-to-self frame. 2205 * 2206 * If the CTS-to-self frames are generated by the host system (i.e., not in 2207 * hardware/firmware), the low-level driver uses this function to receive 2208 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2209 * for calling this function before and CTS-to-self frame is needed. 2210 */ 2211void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2212 struct ieee80211_vif *vif, 2213 const void *frame, size_t frame_len, 2214 const struct ieee80211_tx_info *frame_txctl, 2215 struct ieee80211_cts *cts); 2216 2217/** 2218 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2219 * @hw: pointer obtained from ieee80211_alloc_hw(). 2220 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2221 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2222 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2223 * 2224 * If the CTS-to-self is generated in firmware, but the host system must provide 2225 * the duration field, the low-level driver uses this function to receive 2226 * the duration field value in little-endian byteorder. 2227 */ 2228__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2229 struct ieee80211_vif *vif, 2230 size_t frame_len, 2231 const struct ieee80211_tx_info *frame_txctl); 2232 2233/** 2234 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2235 * @hw: pointer obtained from ieee80211_alloc_hw(). 2236 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2237 * @frame_len: the length of the frame. 2238 * @rate: the rate at which the frame is going to be transmitted. 2239 * 2240 * Calculate the duration field of some generic frame, given its 2241 * length and transmission rate (in 100kbps). 2242 */ 2243__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2244 struct ieee80211_vif *vif, 2245 size_t frame_len, 2246 struct ieee80211_rate *rate); 2247 2248/** 2249 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2250 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2251 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2252 * 2253 * Function for accessing buffered broadcast and multicast frames. If 2254 * hardware/firmware does not implement buffering of broadcast/multicast 2255 * frames when power saving is used, 802.11 code buffers them in the host 2256 * memory. The low-level driver uses this function to fetch next buffered 2257 * frame. In most cases, this is used when generating beacon frame. This 2258 * function returns a pointer to the next buffered skb or NULL if no more 2259 * buffered frames are available. 2260 * 2261 * Note: buffered frames are returned only after DTIM beacon frame was 2262 * generated with ieee80211_beacon_get() and the low-level driver must thus 2263 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2264 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2265 * does not need to check for DTIM beacons separately and should be able to 2266 * use common code for all beacons. 2267 */ 2268struct sk_buff * 2269ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2270 2271/** 2272 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 2273 * 2274 * This function computes a TKIP rc4 key for an skb. It computes 2275 * a phase 1 key if needed (iv16 wraps around). This function is to 2276 * be used by drivers which can do HW encryption but need to compute 2277 * to phase 1/2 key in SW. 2278 * 2279 * @keyconf: the parameter passed with the set key 2280 * @skb: the skb for which the key is needed 2281 * @type: TBD 2282 * @key: a buffer to which the key will be written 2283 */ 2284void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 2285 struct sk_buff *skb, 2286 enum ieee80211_tkip_key_type type, u8 *key); 2287/** 2288 * ieee80211_wake_queue - wake specific queue 2289 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2290 * @queue: queue number (counted from zero). 2291 * 2292 * Drivers should use this function instead of netif_wake_queue. 2293 */ 2294void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 2295 2296/** 2297 * ieee80211_stop_queue - stop specific queue 2298 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2299 * @queue: queue number (counted from zero). 2300 * 2301 * Drivers should use this function instead of netif_stop_queue. 2302 */ 2303void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 2304 2305/** 2306 * ieee80211_queue_stopped - test status of the queue 2307 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2308 * @queue: queue number (counted from zero). 2309 * 2310 * Drivers should use this function instead of netif_stop_queue. 2311 */ 2312 2313int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 2314 2315/** 2316 * ieee80211_stop_queues - stop all queues 2317 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2318 * 2319 * Drivers should use this function instead of netif_stop_queue. 2320 */ 2321void ieee80211_stop_queues(struct ieee80211_hw *hw); 2322 2323/** 2324 * ieee80211_wake_queues - wake all queues 2325 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2326 * 2327 * Drivers should use this function instead of netif_wake_queue. 2328 */ 2329void ieee80211_wake_queues(struct ieee80211_hw *hw); 2330 2331/** 2332 * ieee80211_scan_completed - completed hardware scan 2333 * 2334 * When hardware scan offload is used (i.e. the hw_scan() callback is 2335 * assigned) this function needs to be called by the driver to notify 2336 * mac80211 that the scan finished. This function can be called from 2337 * any context, including hardirq context. 2338 * 2339 * @hw: the hardware that finished the scan 2340 * @aborted: set to true if scan was aborted 2341 */ 2342void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 2343 2344/** 2345 * ieee80211_iterate_active_interfaces - iterate active interfaces 2346 * 2347 * This function iterates over the interfaces associated with a given 2348 * hardware that are currently active and calls the callback for them. 2349 * This function allows the iterator function to sleep, when the iterator 2350 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 2351 * be used. 2352 * Does not iterate over a new interface during add_interface() 2353 * 2354 * @hw: the hardware struct of which the interfaces should be iterated over 2355 * @iterator: the iterator function to call 2356 * @data: first argument of the iterator function 2357 */ 2358void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 2359 void (*iterator)(void *data, u8 *mac, 2360 struct ieee80211_vif *vif), 2361 void *data); 2362 2363/** 2364 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 2365 * 2366 * This function iterates over the interfaces associated with a given 2367 * hardware that are currently active and calls the callback for them. 2368 * This function requires the iterator callback function to be atomic, 2369 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 2370 * Does not iterate over a new interface during add_interface() 2371 * 2372 * @hw: the hardware struct of which the interfaces should be iterated over 2373 * @iterator: the iterator function to call, cannot sleep 2374 * @data: first argument of the iterator function 2375 */ 2376void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 2377 void (*iterator)(void *data, 2378 u8 *mac, 2379 struct ieee80211_vif *vif), 2380 void *data); 2381 2382/** 2383 * ieee80211_queue_work - add work onto the mac80211 workqueue 2384 * 2385 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 2386 * This helper ensures drivers are not queueing work when they should not be. 2387 * 2388 * @hw: the hardware struct for the interface we are adding work for 2389 * @work: the work we want to add onto the mac80211 workqueue 2390 */ 2391void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 2392 2393/** 2394 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 2395 * 2396 * Drivers and mac80211 use this to queue delayed work onto the mac80211 2397 * workqueue. 2398 * 2399 * @hw: the hardware struct for the interface we are adding work for 2400 * @dwork: delayable work to queue onto the mac80211 workqueue 2401 * @delay: number of jiffies to wait before queueing 2402 */ 2403void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 2404 struct delayed_work *dwork, 2405 unsigned long delay); 2406 2407/** 2408 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 2409 * @sta: the station for which to start a BA session 2410 * @tid: the TID to BA on. 2411 * 2412 * Return: success if addBA request was sent, failure otherwise 2413 * 2414 * Although mac80211/low level driver/user space application can estimate 2415 * the need to start aggregation on a certain RA/TID, the session level 2416 * will be managed by the mac80211. 2417 */ 2418int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2419 2420/** 2421 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 2422 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2423 * @ra: receiver address of the BA session recipient. 2424 * @tid: the TID to BA on. 2425 * 2426 * This function must be called by low level driver once it has 2427 * finished with preparations for the BA session. It can be called 2428 * from any context. 2429 */ 2430void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2431 u16 tid); 2432 2433/** 2434 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 2435 * @sta: the station whose BA session to stop 2436 * @tid: the TID to stop BA. 2437 * 2438 * Return: negative error if the TID is invalid, or no aggregation active 2439 * 2440 * Although mac80211/low level driver/user space application can estimate 2441 * the need to stop aggregation on a certain RA/TID, the session level 2442 * will be managed by the mac80211. 2443 */ 2444int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2445 2446/** 2447 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 2448 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2449 * @ra: receiver address of the BA session recipient. 2450 * @tid: the desired TID to BA on. 2451 * 2452 * This function must be called by low level driver once it has 2453 * finished with preparations for the BA session tear down. It 2454 * can be called from any context. 2455 */ 2456void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2457 u16 tid); 2458 2459/** 2460 * ieee80211_find_sta - find a station 2461 * 2462 * @vif: virtual interface to look for station on 2463 * @addr: station's address 2464 * 2465 * This function must be called under RCU lock and the 2466 * resulting pointer is only valid under RCU lock as well. 2467 */ 2468struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 2469 const u8 *addr); 2470 2471/** 2472 * ieee80211_find_sta_by_ifaddr - find a station on hardware 2473 * 2474 * @hw: pointer as obtained from ieee80211_alloc_hw() 2475 * @addr: remote station's address 2476 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 2477 * 2478 * This function must be called under RCU lock and the 2479 * resulting pointer is only valid under RCU lock as well. 2480 * 2481 * NOTE: You may pass NULL for localaddr, but then you will just get 2482 * the first STA that matches the remote address 'addr'. 2483 * We can have multiple STA associated with multiple 2484 * logical stations (e.g. consider a station connecting to another 2485 * BSSID on the same AP hardware without disconnecting first). 2486 * In this case, the result of this method with localaddr NULL 2487 * is not reliable. 2488 * 2489 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 2490 */ 2491struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 2492 const u8 *addr, 2493 const u8 *localaddr); 2494 2495/** 2496 * ieee80211_sta_block_awake - block station from waking up 2497 * @hw: the hardware 2498 * @pubsta: the station 2499 * @block: whether to block or unblock 2500 * 2501 * Some devices require that all frames that are on the queues 2502 * for a specific station that went to sleep are flushed before 2503 * a poll response or frames after the station woke up can be 2504 * delivered to that it. Note that such frames must be rejected 2505 * by the driver as filtered, with the appropriate status flag. 2506 * 2507 * This function allows implementing this mode in a race-free 2508 * manner. 2509 * 2510 * To do this, a driver must keep track of the number of frames 2511 * still enqueued for a specific station. If this number is not 2512 * zero when the station goes to sleep, the driver must call 2513 * this function to force mac80211 to consider the station to 2514 * be asleep regardless of the station's actual state. Once the 2515 * number of outstanding frames reaches zero, the driver must 2516 * call this function again to unblock the station. That will 2517 * cause mac80211 to be able to send ps-poll responses, and if 2518 * the station queried in the meantime then frames will also 2519 * be sent out as a result of this. Additionally, the driver 2520 * will be notified that the station woke up some time after 2521 * it is unblocked, regardless of whether the station actually 2522 * woke up while blocked or not. 2523 */ 2524void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2525 struct ieee80211_sta *pubsta, bool block); 2526 2527/** 2528 * ieee80211_ap_probereq_get - retrieve a Probe Request template 2529 * @hw: pointer obtained from ieee80211_alloc_hw(). 2530 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2531 * 2532 * Creates a Probe Request template which can, for example, be uploaded to 2533 * hardware. The template is filled with bssid, ssid and supported rate 2534 * information. This function must only be called from within the 2535 * .bss_info_changed callback function and only in managed mode. The function 2536 * is only useful when the interface is associated, otherwise it will return 2537 * NULL. 2538 */ 2539struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 2540 struct ieee80211_vif *vif); 2541 2542/** 2543 * ieee80211_beacon_loss - inform hardware does not receive beacons 2544 * 2545 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2546 * 2547 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER and 2548 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 2549 * hardware is not receiving beacons with this function. 2550 */ 2551void ieee80211_beacon_loss(struct ieee80211_vif *vif); 2552 2553/** 2554 * ieee80211_connection_loss - inform hardware has lost connection to the AP 2555 * 2556 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2557 * 2558 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER, and 2559 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 2560 * needs to inform if the connection to the AP has been lost. 2561 * 2562 * This function will cause immediate change to disassociated state, 2563 * without connection recovery attempts. 2564 */ 2565void ieee80211_connection_loss(struct ieee80211_vif *vif); 2566 2567/** 2568 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 2569 * 2570 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2571 * 2572 * Some hardware require full power save to manage simultaneous BT traffic 2573 * on the WLAN frequency. Full PSM is required periodically, whenever there are 2574 * burst of BT traffic. The hardware gets information of BT traffic via 2575 * hardware co-existence lines, and consequentially requests mac80211 to 2576 * (temporarily) enter full psm. 2577 * This function will only temporarily disable dynamic PS, not enable PSM if 2578 * it was not already enabled. 2579 * The driver must make sure to re-enable dynamic PS using 2580 * ieee80211_enable_dyn_ps() if the driver has disabled it. 2581 * 2582 */ 2583void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 2584 2585/** 2586 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 2587 * 2588 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2589 * 2590 * This function restores dynamic PS after being temporarily disabled via 2591 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 2592 * be coupled with an eventual call to this function. 2593 * 2594 */ 2595void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 2596 2597/** 2598 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 2599 * rssi threshold triggered 2600 * 2601 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2602 * @rssi_event: the RSSI trigger event type 2603 * @gfp: context flags 2604 * 2605 * When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality 2606 * monitoring is configured with an rssi threshold, the driver will inform 2607 * whenever the rssi level reaches the threshold. 2608 */ 2609void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 2610 enum nl80211_cqm_rssi_threshold_event rssi_event, 2611 gfp_t gfp); 2612 2613/** 2614 * ieee80211_chswitch_done - Complete channel switch process 2615 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2616 * @success: make the channel switch successful or not 2617 * 2618 * Complete the channel switch post-process: set the new operational channel 2619 * and wake up the suspended queues. 2620 */ 2621void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 2622 2623/** 2624 * ieee80211_request_smps - request SM PS transition 2625 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2626 * @smps_mode: new SM PS mode 2627 * 2628 * This allows the driver to request an SM PS transition in managed 2629 * mode. This is useful when the driver has more information than 2630 * the stack about possible interference, for example by bluetooth. 2631 */ 2632void ieee80211_request_smps(struct ieee80211_vif *vif, 2633 enum ieee80211_smps_mode smps_mode); 2634 2635/** 2636 * ieee80211_key_removed - disable hw acceleration for key 2637 * @key_conf: The key hw acceleration should be disabled for 2638 * 2639 * This allows drivers to indicate that the given key has been 2640 * removed from hardware acceleration, due to a new key that 2641 * was added. Don't use this if the key can continue to be used 2642 * for TX, if the key restriction is on RX only it is permitted 2643 * to keep the key for TX only and not call this function. 2644 * 2645 * Due to locking constraints, it may only be called during 2646 * @set_key. This function must be allowed to sleep, and the 2647 * key it tries to disable may still be used until it returns. 2648 */ 2649void ieee80211_key_removed(struct ieee80211_key_conf *key_conf); 2650 2651/* Rate control API */ 2652 2653/** 2654 * enum rate_control_changed - flags to indicate which parameter changed 2655 * 2656 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 2657 * changed, rate control algorithm can update its internal state if needed. 2658 */ 2659enum rate_control_changed { 2660 IEEE80211_RC_HT_CHANGED = BIT(0) 2661}; 2662 2663/** 2664 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 2665 * 2666 * @hw: The hardware the algorithm is invoked for. 2667 * @sband: The band this frame is being transmitted on. 2668 * @bss_conf: the current BSS configuration 2669 * @reported_rate: The rate control algorithm can fill this in to indicate 2670 * which rate should be reported to userspace as the current rate and 2671 * used for rate calculations in the mesh network. 2672 * @rts: whether RTS will be used for this frame because it is longer than the 2673 * RTS threshold 2674 * @short_preamble: whether mac80211 will request short-preamble transmission 2675 * if the selected rate supports it 2676 * @max_rate_idx: user-requested maximum rate (not MCS for now) 2677 * (deprecated; this will be removed once drivers get updated to use 2678 * rate_idx_mask) 2679 * @rate_idx_mask: user-requested rate mask (not MCS for now) 2680 * @skb: the skb that will be transmitted, the control information in it needs 2681 * to be filled in 2682 * @bss: whether this frame is sent out in AP or IBSS mode 2683 */ 2684struct ieee80211_tx_rate_control { 2685 struct ieee80211_hw *hw; 2686 struct ieee80211_supported_band *sband; 2687 struct ieee80211_bss_conf *bss_conf; 2688 struct sk_buff *skb; 2689 struct ieee80211_tx_rate reported_rate; 2690 bool rts, short_preamble; 2691 u8 max_rate_idx; 2692 u32 rate_idx_mask; 2693 bool bss; 2694}; 2695 2696struct rate_control_ops { 2697 struct module *module; 2698 const char *name; 2699 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 2700 void (*free)(void *priv); 2701 2702 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 2703 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 2704 struct ieee80211_sta *sta, void *priv_sta); 2705 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 2706 struct ieee80211_sta *sta, 2707 void *priv_sta, u32 changed, 2708 enum nl80211_channel_type oper_chan_type); 2709 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 2710 void *priv_sta); 2711 2712 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 2713 struct ieee80211_sta *sta, void *priv_sta, 2714 struct sk_buff *skb); 2715 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 2716 struct ieee80211_tx_rate_control *txrc); 2717 2718 void (*add_sta_debugfs)(void *priv, void *priv_sta, 2719 struct dentry *dir); 2720 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 2721}; 2722 2723static inline int rate_supported(struct ieee80211_sta *sta, 2724 enum ieee80211_band band, 2725 int index) 2726{ 2727 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 2728} 2729 2730/** 2731 * rate_control_send_low - helper for drivers for management/no-ack frames 2732 * 2733 * Rate control algorithms that agree to use the lowest rate to 2734 * send management frames and NO_ACK data with the respective hw 2735 * retries should use this in the beginning of their mac80211 get_rate 2736 * callback. If true is returned the rate control can simply return. 2737 * If false is returned we guarantee that sta and sta and priv_sta is 2738 * not null. 2739 * 2740 * Rate control algorithms wishing to do more intelligent selection of 2741 * rate for multicast/broadcast frames may choose to not use this. 2742 * 2743 * @sta: &struct ieee80211_sta pointer to the target destination. Note 2744 * that this may be null. 2745 * @priv_sta: private rate control structure. This may be null. 2746 * @txrc: rate control information we sholud populate for mac80211. 2747 */ 2748bool rate_control_send_low(struct ieee80211_sta *sta, 2749 void *priv_sta, 2750 struct ieee80211_tx_rate_control *txrc); 2751 2752 2753static inline s8 2754rate_lowest_index(struct ieee80211_supported_band *sband, 2755 struct ieee80211_sta *sta) 2756{ 2757 int i; 2758 2759 for (i = 0; i < sband->n_bitrates; i++) 2760 if (rate_supported(sta, sband->band, i)) 2761 return i; 2762 2763 /* warn when we cannot find a rate. */ 2764 WARN_ON(1); 2765 2766 return 0; 2767} 2768 2769static inline 2770bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 2771 struct ieee80211_sta *sta) 2772{ 2773 unsigned int i; 2774 2775 for (i = 0; i < sband->n_bitrates; i++) 2776 if (rate_supported(sta, sband->band, i)) 2777 return true; 2778 return false; 2779} 2780 2781int ieee80211_rate_control_register(struct rate_control_ops *ops); 2782void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 2783 2784static inline bool 2785conf_is_ht20(struct ieee80211_conf *conf) 2786{ 2787 return conf->channel_type == NL80211_CHAN_HT20; 2788} 2789 2790static inline bool 2791conf_is_ht40_minus(struct ieee80211_conf *conf) 2792{ 2793 return conf->channel_type == NL80211_CHAN_HT40MINUS; 2794} 2795 2796static inline bool 2797conf_is_ht40_plus(struct ieee80211_conf *conf) 2798{ 2799 return conf->channel_type == NL80211_CHAN_HT40PLUS; 2800} 2801 2802static inline bool 2803conf_is_ht40(struct ieee80211_conf *conf) 2804{ 2805 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 2806} 2807 2808static inline bool 2809conf_is_ht(struct ieee80211_conf *conf) 2810{ 2811 return conf->channel_type != NL80211_CHAN_NO_HT; 2812} 2813 2814static inline enum nl80211_iftype 2815ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 2816{ 2817 if (p2p) { 2818 switch (type) { 2819 case NL80211_IFTYPE_STATION: 2820 return NL80211_IFTYPE_P2P_CLIENT; 2821 case NL80211_IFTYPE_AP: 2822 return NL80211_IFTYPE_P2P_GO; 2823 default: 2824 break; 2825 } 2826 } 2827 return type; 2828} 2829 2830static inline enum nl80211_iftype 2831ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 2832{ 2833 return ieee80211_iftype_p2p(vif->type, vif->p2p); 2834} 2835 2836#endif /* MAC80211_H */ 2837