mac80211.h revision e9ac0745c734d39cb55ce45f1fb03a85c972b35a
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/device.h> 20#include <linux/ieee80211.h> 21#include <net/cfg80211.h> 22#include <asm/unaligned.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#define IEEE80211_NUM_ACS 4 113 114/** 115 * struct ieee80211_tx_queue_params - transmit queue configuration 116 * 117 * The information provided in this structure is required for QoS 118 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 119 * 120 * @aifs: arbitration interframe space [0..255] 121 * @cw_min: minimum contention window [a value of the form 122 * 2^n-1 in the range 1..32767] 123 * @cw_max: maximum contention window [like @cw_min] 124 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 125 * @uapsd: is U-APSD mode enabled for the queue 126 */ 127struct ieee80211_tx_queue_params { 128 u16 txop; 129 u16 cw_min; 130 u16 cw_max; 131 u8 aifs; 132 bool uapsd; 133}; 134 135struct ieee80211_low_level_stats { 136 unsigned int dot11ACKFailureCount; 137 unsigned int dot11RTSFailureCount; 138 unsigned int dot11FCSErrorCount; 139 unsigned int dot11RTSSuccessCount; 140}; 141 142/** 143 * enum ieee80211_bss_change - BSS change notification flags 144 * 145 * These flags are used with the bss_info_changed() callback 146 * to indicate which BSS parameter changed. 147 * 148 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 149 * also implies a change in the AID. 150 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 151 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 152 * @BSS_CHANGED_ERP_SLOT: slot timing changed 153 * @BSS_CHANGED_HT: 802.11n parameters changed 154 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 155 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 156 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 157 * reason (IBSS and managed mode) 158 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 159 * new beacon (beaconing modes) 160 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 161 * enabled/disabled (beaconing modes) 162 * @BSS_CHANGED_CQM: Connection quality monitor config changed 163 * @BSS_CHANGED_IBSS: IBSS join status changed 164 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 165 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 166 * that it is only ever disabled for station mode. 167 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 168 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 169 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 170 */ 171enum ieee80211_bss_change { 172 BSS_CHANGED_ASSOC = 1<<0, 173 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 174 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 175 BSS_CHANGED_ERP_SLOT = 1<<3, 176 BSS_CHANGED_HT = 1<<4, 177 BSS_CHANGED_BASIC_RATES = 1<<5, 178 BSS_CHANGED_BEACON_INT = 1<<6, 179 BSS_CHANGED_BSSID = 1<<7, 180 BSS_CHANGED_BEACON = 1<<8, 181 BSS_CHANGED_BEACON_ENABLED = 1<<9, 182 BSS_CHANGED_CQM = 1<<10, 183 BSS_CHANGED_IBSS = 1<<11, 184 BSS_CHANGED_ARP_FILTER = 1<<12, 185 BSS_CHANGED_QOS = 1<<13, 186 BSS_CHANGED_IDLE = 1<<14, 187 BSS_CHANGED_SSID = 1<<15, 188 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 189 190 /* when adding here, make sure to change ieee80211_reconfig */ 191}; 192 193/* 194 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 195 * of addresses for an interface increase beyond this value, hardware ARP 196 * filtering will be disabled. 197 */ 198#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 199 200/** 201 * enum ieee80211_rssi_event - RSSI threshold event 202 * An indicator for when RSSI goes below/above a certain threshold. 203 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 204 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 205 */ 206enum ieee80211_rssi_event { 207 RSSI_EVENT_HIGH, 208 RSSI_EVENT_LOW, 209}; 210 211/** 212 * struct ieee80211_bss_conf - holds the BSS's changing parameters 213 * 214 * This structure keeps information about a BSS (and an association 215 * to that BSS) that can change during the lifetime of the BSS. 216 * 217 * @assoc: association status 218 * @ibss_joined: indicates whether this station is part of an IBSS 219 * or not 220 * @aid: association ID number, valid only when @assoc is true 221 * @use_cts_prot: use CTS protection 222 * @use_short_preamble: use 802.11b short preamble; 223 * if the hardware cannot handle this it must set the 224 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 225 * @use_short_slot: use short slot time (only relevant for ERP); 226 * if the hardware cannot handle this it must set the 227 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 228 * @dtim_period: num of beacons before the next DTIM, for beaconing, 229 * valid in station mode only while @assoc is true and if also 230 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 231 * @ps_dtim_period) 232 * @last_tsf: last beacon's/probe response's TSF timestamp (could be old 233 * as it may have been received during scanning long ago) 234 * @beacon_int: beacon interval 235 * @assoc_capability: capabilities taken from assoc resp 236 * @basic_rates: bitmap of basic rates, each bit stands for an 237 * index into the rate table configured by the driver in 238 * the current band. 239 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 240 * @bssid: The BSSID for this BSS 241 * @enable_beacon: whether beaconing should be enabled or not 242 * @channel_type: Channel type for this BSS -- the hardware might be 243 * configured for HT40+ while this BSS only uses no-HT, for 244 * example. 245 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 246 * This field is only valid when the channel type is one of the HT types. 247 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 248 * implies disabled 249 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 250 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 251 * may filter ARP queries targeted for other addresses than listed here. 252 * The driver must allow ARP queries targeted for all address listed here 253 * to pass through. An empty list implies no ARP queries need to pass. 254 * @arp_addr_cnt: Number of addresses currently on the list. 255 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 256 * filter ARP queries based on the @arp_addr_list, if disabled, the 257 * hardware must not perform any ARP filtering. Note, that the filter will 258 * be enabled also in promiscuous mode. 259 * @qos: This is a QoS-enabled BSS. 260 * @idle: This interface is idle. There's also a global idle flag in the 261 * hardware config which may be more appropriate depending on what 262 * your driver/device needs to do. 263 * @ssid: The SSID of the current vif. Only valid in AP-mode. 264 * @ssid_len: Length of SSID given in @ssid. 265 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 266 */ 267struct ieee80211_bss_conf { 268 const u8 *bssid; 269 /* association related data */ 270 bool assoc, ibss_joined; 271 u16 aid; 272 /* erp related data */ 273 bool use_cts_prot; 274 bool use_short_preamble; 275 bool use_short_slot; 276 bool enable_beacon; 277 u8 dtim_period; 278 u16 beacon_int; 279 u16 assoc_capability; 280 u64 last_tsf; 281 u32 basic_rates; 282 int mcast_rate[IEEE80211_NUM_BANDS]; 283 u16 ht_operation_mode; 284 s32 cqm_rssi_thold; 285 u32 cqm_rssi_hyst; 286 enum nl80211_channel_type channel_type; 287 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 288 u8 arp_addr_cnt; 289 bool arp_filter_enabled; 290 bool qos; 291 bool idle; 292 u8 ssid[IEEE80211_MAX_SSID_LEN]; 293 size_t ssid_len; 294 bool hidden_ssid; 295}; 296 297/** 298 * enum mac80211_tx_control_flags - flags to describe transmission information/status 299 * 300 * These flags are used with the @flags member of &ieee80211_tx_info. 301 * 302 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 303 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 304 * number to this frame, taking care of not overwriting the fragment 305 * number and increasing the sequence number only when the 306 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 307 * assign sequence numbers to QoS-data frames but cannot do so correctly 308 * for non-QoS-data and management frames because beacons need them from 309 * that counter as well and mac80211 cannot guarantee proper sequencing. 310 * If this flag is set, the driver should instruct the hardware to 311 * assign a sequence number to the frame or assign one itself. Cf. IEEE 312 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 313 * beacons and always be clear for frames without a sequence number field. 314 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 315 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 316 * station 317 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 318 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 319 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 320 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 321 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 322 * because the destination STA was in powersave mode. Note that to 323 * avoid race conditions, the filter must be set by the hardware or 324 * firmware upon receiving a frame that indicates that the station 325 * went to sleep (must be done on device to filter frames already on 326 * the queue) and may only be unset after mac80211 gives the OK for 327 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 328 * since only then is it guaranteed that no more frames are in the 329 * hardware queue. 330 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 331 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 332 * is for the whole aggregation. 333 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 334 * so consider using block ack request (BAR). 335 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 336 * set by rate control algorithms to indicate probe rate, will 337 * be cleared for fragmented frames (except on the last fragment) 338 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 339 * used to indicate that a pending frame requires TX processing before 340 * it can be sent out. 341 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 342 * used to indicate that a frame was already retried due to PS 343 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 344 * used to indicate frame should not be encrypted 345 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 346 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 347 * be sent although the station is in powersave mode. 348 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 349 * transmit function after the current frame, this can be used 350 * by drivers to kick the DMA queue only if unset or when the 351 * queue gets full. 352 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 353 * after TX status because the destination was asleep, it must not 354 * be modified again (no seqno assignment, crypto, etc.) 355 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 356 * MLME command (internal to mac80211 to figure out whether to send TX 357 * status to user space) 358 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 359 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 360 * frame and selects the maximum number of streams that it can use. 361 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 362 * the off-channel channel when a remain-on-channel offload is done 363 * in hardware -- normal packets still flow and are expected to be 364 * handled properly by the device. 365 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 366 * testing. It will be sent out with incorrect Michael MIC key to allow 367 * TKIP countermeasures to be tested. 368 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 369 * This flag is actually used for management frame especially for P2P 370 * frames not being sent at CCK rate in 2GHz band. 371 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 372 * when its status is reported the service period ends. For frames in 373 * an SP that mac80211 transmits, it is already set; for driver frames 374 * the driver may set this flag. It is also used to do the same for 375 * PS-Poll responses. 376 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 377 * This flag is used to send nullfunc frame at minimum rate when 378 * the nullfunc is used for connection monitoring purpose. 379 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 380 * would be fragmented by size (this is optional, only used for 381 * monitor injection). 382 * 383 * Note: If you have to add new flags to the enumeration, then don't 384 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 385 */ 386enum mac80211_tx_control_flags { 387 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 388 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 389 IEEE80211_TX_CTL_NO_ACK = BIT(2), 390 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 391 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 392 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 393 IEEE80211_TX_CTL_AMPDU = BIT(6), 394 IEEE80211_TX_CTL_INJECTED = BIT(7), 395 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 396 IEEE80211_TX_STAT_ACK = BIT(9), 397 IEEE80211_TX_STAT_AMPDU = BIT(10), 398 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 399 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 400 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 401 IEEE80211_TX_INTFL_RETRIED = BIT(15), 402 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 403 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 404 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 405 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 406 /* hole at 20, use later */ 407 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 408 IEEE80211_TX_CTL_LDPC = BIT(22), 409 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 410 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 411 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 412 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 413 IEEE80211_TX_STATUS_EOSP = BIT(28), 414 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 415 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 416}; 417 418#define IEEE80211_TX_CTL_STBC_SHIFT 23 419 420/* 421 * This definition is used as a mask to clear all temporary flags, which are 422 * set by the tx handlers for each transmission attempt by the mac80211 stack. 423 */ 424#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 425 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 426 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 427 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 428 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 429 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 430 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 431 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 432 433/** 434 * enum mac80211_rate_control_flags - per-rate flags set by the 435 * Rate Control algorithm. 436 * 437 * These flags are set by the Rate control algorithm for each rate during tx, 438 * in the @flags member of struct ieee80211_tx_rate. 439 * 440 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 441 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 442 * This is set if the current BSS requires ERP protection. 443 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 444 * @IEEE80211_TX_RC_MCS: HT rate. 445 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 446 * Greenfield mode. 447 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 448 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 449 * adjacent 20 MHz channels, if the current channel type is 450 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 451 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 452 */ 453enum mac80211_rate_control_flags { 454 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 455 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 456 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 457 458 /* rate index is an MCS rate number instead of an index */ 459 IEEE80211_TX_RC_MCS = BIT(3), 460 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 461 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 462 IEEE80211_TX_RC_DUP_DATA = BIT(6), 463 IEEE80211_TX_RC_SHORT_GI = BIT(7), 464}; 465 466 467/* there are 40 bytes if you don't need the rateset to be kept */ 468#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 469 470/* if you do need the rateset, then you have less space */ 471#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 472 473/* maximum number of rate stages */ 474#define IEEE80211_TX_MAX_RATES 5 475 476/** 477 * struct ieee80211_tx_rate - rate selection/status 478 * 479 * @idx: rate index to attempt to send with 480 * @flags: rate control flags (&enum mac80211_rate_control_flags) 481 * @count: number of tries in this rate before going to the next rate 482 * 483 * A value of -1 for @idx indicates an invalid rate and, if used 484 * in an array of retry rates, that no more rates should be tried. 485 * 486 * When used for transmit status reporting, the driver should 487 * always report the rate along with the flags it used. 488 * 489 * &struct ieee80211_tx_info contains an array of these structs 490 * in the control information, and it will be filled by the rate 491 * control algorithm according to what should be sent. For example, 492 * if this array contains, in the format { <idx>, <count> } the 493 * information 494 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 495 * then this means that the frame should be transmitted 496 * up to twice at rate 3, up to twice at rate 2, and up to four 497 * times at rate 1 if it doesn't get acknowledged. Say it gets 498 * acknowledged by the peer after the fifth attempt, the status 499 * information should then contain 500 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 501 * since it was transmitted twice at rate 3, twice at rate 2 502 * and once at rate 1 after which we received an acknowledgement. 503 */ 504struct ieee80211_tx_rate { 505 s8 idx; 506 u8 count; 507 u8 flags; 508} __packed; 509 510/** 511 * struct ieee80211_tx_info - skb transmit information 512 * 513 * This structure is placed in skb->cb for three uses: 514 * (1) mac80211 TX control - mac80211 tells the driver what to do 515 * (2) driver internal use (if applicable) 516 * (3) TX status information - driver tells mac80211 what happened 517 * 518 * The TX control's sta pointer is only valid during the ->tx call, 519 * it may be NULL. 520 * 521 * @flags: transmit info flags, defined above 522 * @band: the band to transmit on (use for checking for races) 523 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 524 * @ack_frame_id: internal frame ID for TX status, used internally 525 * @control: union for control data 526 * @status: union for status data 527 * @driver_data: array of driver_data pointers 528 * @ampdu_ack_len: number of acked aggregated frames. 529 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 530 * @ampdu_len: number of aggregated frames. 531 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 532 * @ack_signal: signal strength of the ACK frame 533 */ 534struct ieee80211_tx_info { 535 /* common information */ 536 u32 flags; 537 u8 band; 538 539 u8 antenna_sel_tx; 540 541 u16 ack_frame_id; 542 543 union { 544 struct { 545 union { 546 /* rate control */ 547 struct { 548 struct ieee80211_tx_rate rates[ 549 IEEE80211_TX_MAX_RATES]; 550 s8 rts_cts_rate_idx; 551 }; 552 /* only needed before rate control */ 553 unsigned long jiffies; 554 }; 555 /* NB: vif can be NULL for injected frames */ 556 struct ieee80211_vif *vif; 557 struct ieee80211_key_conf *hw_key; 558 struct ieee80211_sta *sta; 559 } control; 560 struct { 561 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 562 u8 ampdu_ack_len; 563 int ack_signal; 564 u8 ampdu_len; 565 /* 15 bytes free */ 566 } status; 567 struct { 568 struct ieee80211_tx_rate driver_rates[ 569 IEEE80211_TX_MAX_RATES]; 570 void *rate_driver_data[ 571 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 572 }; 573 void *driver_data[ 574 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 575 }; 576}; 577 578/** 579 * struct ieee80211_sched_scan_ies - scheduled scan IEs 580 * 581 * This structure is used to pass the appropriate IEs to be used in scheduled 582 * scans for all bands. It contains both the IEs passed from the userspace 583 * and the ones generated by mac80211. 584 * 585 * @ie: array with the IEs for each supported band 586 * @len: array with the total length of the IEs for each band 587 */ 588struct ieee80211_sched_scan_ies { 589 u8 *ie[IEEE80211_NUM_BANDS]; 590 size_t len[IEEE80211_NUM_BANDS]; 591}; 592 593static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 594{ 595 return (struct ieee80211_tx_info *)skb->cb; 596} 597 598static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 599{ 600 return (struct ieee80211_rx_status *)skb->cb; 601} 602 603/** 604 * ieee80211_tx_info_clear_status - clear TX status 605 * 606 * @info: The &struct ieee80211_tx_info to be cleared. 607 * 608 * When the driver passes an skb back to mac80211, it must report 609 * a number of things in TX status. This function clears everything 610 * in the TX status but the rate control information (it does clear 611 * the count since you need to fill that in anyway). 612 * 613 * NOTE: You can only use this function if you do NOT use 614 * info->driver_data! Use info->rate_driver_data 615 * instead if you need only the less space that allows. 616 */ 617static inline void 618ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 619{ 620 int i; 621 622 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 623 offsetof(struct ieee80211_tx_info, control.rates)); 624 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 625 offsetof(struct ieee80211_tx_info, driver_rates)); 626 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 627 /* clear the rate counts */ 628 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 629 info->status.rates[i].count = 0; 630 631 BUILD_BUG_ON( 632 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 633 memset(&info->status.ampdu_ack_len, 0, 634 sizeof(struct ieee80211_tx_info) - 635 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 636} 637 638 639/** 640 * enum mac80211_rx_flags - receive flags 641 * 642 * These flags are used with the @flag member of &struct ieee80211_rx_status. 643 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 644 * Use together with %RX_FLAG_MMIC_STRIPPED. 645 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 646 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 647 * verification has been done by the hardware. 648 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 649 * If this flag is set, the stack cannot do any replay detection 650 * hence the driver or hardware will have to do that. 651 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 652 * the frame. 653 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 654 * the frame. 655 * @RX_FLAG_MACTIME_MPDU: The timestamp passed in the RX status (@mactime 656 * field) is valid and contains the time the first symbol of the MPDU 657 * was received. This is useful in monitor mode and for proper IBSS 658 * merging. 659 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 660 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 661 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 662 * @RX_FLAG_SHORT_GI: Short guard interval was used 663 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 664 * Valid only for data frames (mainly A-MPDU) 665 */ 666enum mac80211_rx_flags { 667 RX_FLAG_MMIC_ERROR = 1<<0, 668 RX_FLAG_DECRYPTED = 1<<1, 669 RX_FLAG_MMIC_STRIPPED = 1<<3, 670 RX_FLAG_IV_STRIPPED = 1<<4, 671 RX_FLAG_FAILED_FCS_CRC = 1<<5, 672 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 673 RX_FLAG_MACTIME_MPDU = 1<<7, 674 RX_FLAG_SHORTPRE = 1<<8, 675 RX_FLAG_HT = 1<<9, 676 RX_FLAG_40MHZ = 1<<10, 677 RX_FLAG_SHORT_GI = 1<<11, 678 RX_FLAG_NO_SIGNAL_VAL = 1<<12, 679}; 680 681/** 682 * struct ieee80211_rx_status - receive status 683 * 684 * The low-level driver should provide this information (the subset 685 * supported by hardware) to the 802.11 code with each received 686 * frame, in the skb's control buffer (cb). 687 * 688 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 689 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 690 * @band: the active band when this frame was received 691 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 692 * @signal: signal strength when receiving this frame, either in dBm, in dB or 693 * unspecified depending on the hardware capabilities flags 694 * @IEEE80211_HW_SIGNAL_* 695 * @antenna: antenna used 696 * @rate_idx: index of data rate into band's supported rates or MCS index if 697 * HT rates are use (RX_FLAG_HT) 698 * @flag: %RX_FLAG_* 699 * @rx_flags: internal RX flags for mac80211 700 */ 701struct ieee80211_rx_status { 702 u64 mactime; 703 enum ieee80211_band band; 704 int freq; 705 int signal; 706 int antenna; 707 int rate_idx; 708 int flag; 709 unsigned int rx_flags; 710}; 711 712/** 713 * enum ieee80211_conf_flags - configuration flags 714 * 715 * Flags to define PHY configuration options 716 * 717 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 718 * to determine for example whether to calculate timestamps for packets 719 * or not, do not use instead of filter flags! 720 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 721 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 722 * meaning that the hardware still wakes up for beacons, is able to 723 * transmit frames and receive the possible acknowledgment frames. 724 * Not to be confused with hardware specific wakeup/sleep states, 725 * driver is responsible for that. See the section "Powersave support" 726 * for more. 727 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 728 * the driver should be prepared to handle configuration requests but 729 * may turn the device off as much as possible. Typically, this flag will 730 * be set when an interface is set UP but not associated or scanning, but 731 * it can also be unset in that case when monitor interfaces are active. 732 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 733 * operating channel. 734 */ 735enum ieee80211_conf_flags { 736 IEEE80211_CONF_MONITOR = (1<<0), 737 IEEE80211_CONF_PS = (1<<1), 738 IEEE80211_CONF_IDLE = (1<<2), 739 IEEE80211_CONF_OFFCHANNEL = (1<<3), 740}; 741 742 743/** 744 * enum ieee80211_conf_changed - denotes which configuration changed 745 * 746 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 747 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 748 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 749 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 750 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 751 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 752 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 753 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 754 */ 755enum ieee80211_conf_changed { 756 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 757 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 758 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 759 IEEE80211_CONF_CHANGE_PS = BIT(4), 760 IEEE80211_CONF_CHANGE_POWER = BIT(5), 761 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 762 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 763 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 764}; 765 766/** 767 * enum ieee80211_smps_mode - spatial multiplexing power save mode 768 * 769 * @IEEE80211_SMPS_AUTOMATIC: automatic 770 * @IEEE80211_SMPS_OFF: off 771 * @IEEE80211_SMPS_STATIC: static 772 * @IEEE80211_SMPS_DYNAMIC: dynamic 773 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 774 */ 775enum ieee80211_smps_mode { 776 IEEE80211_SMPS_AUTOMATIC, 777 IEEE80211_SMPS_OFF, 778 IEEE80211_SMPS_STATIC, 779 IEEE80211_SMPS_DYNAMIC, 780 781 /* keep last */ 782 IEEE80211_SMPS_NUM_MODES, 783}; 784 785/** 786 * struct ieee80211_conf - configuration of the device 787 * 788 * This struct indicates how the driver shall configure the hardware. 789 * 790 * @flags: configuration flags defined above 791 * 792 * @listen_interval: listen interval in units of beacon interval 793 * @max_sleep_period: the maximum number of beacon intervals to sleep for 794 * before checking the beacon for a TIM bit (managed mode only); this 795 * value will be only achievable between DTIM frames, the hardware 796 * needs to check for the multicast traffic bit in DTIM beacons. 797 * This variable is valid only when the CONF_PS flag is set. 798 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 799 * in power saving. Power saving will not be enabled until a beacon 800 * has been received and the DTIM period is known. 801 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 802 * powersave documentation below. This variable is valid only when 803 * the CONF_PS flag is set. 804 * 805 * @power_level: requested transmit power (in dBm) 806 * 807 * @channel: the channel to tune to 808 * @channel_type: the channel (HT) type 809 * 810 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 811 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 812 * but actually means the number of transmissions not the number of retries 813 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 814 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 815 * number of transmissions not the number of retries 816 * 817 * @smps_mode: spatial multiplexing powersave mode; note that 818 * %IEEE80211_SMPS_STATIC is used when the device is not 819 * configured for an HT channel 820 */ 821struct ieee80211_conf { 822 u32 flags; 823 int power_level, dynamic_ps_timeout; 824 int max_sleep_period; 825 826 u16 listen_interval; 827 u8 ps_dtim_period; 828 829 u8 long_frame_max_tx_count, short_frame_max_tx_count; 830 831 struct ieee80211_channel *channel; 832 enum nl80211_channel_type channel_type; 833 enum ieee80211_smps_mode smps_mode; 834}; 835 836/** 837 * struct ieee80211_channel_switch - holds the channel switch data 838 * 839 * The information provided in this structure is required for channel switch 840 * operation. 841 * 842 * @timestamp: value in microseconds of the 64-bit Time Synchronization 843 * Function (TSF) timer when the frame containing the channel switch 844 * announcement was received. This is simply the rx.mactime parameter 845 * the driver passed into mac80211. 846 * @block_tx: Indicates whether transmission must be blocked before the 847 * scheduled channel switch, as indicated by the AP. 848 * @channel: the new channel to switch to 849 * @count: the number of TBTT's until the channel switch event 850 */ 851struct ieee80211_channel_switch { 852 u64 timestamp; 853 bool block_tx; 854 struct ieee80211_channel *channel; 855 u8 count; 856}; 857 858/** 859 * enum ieee80211_vif_flags - virtual interface flags 860 * 861 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 862 * on this virtual interface to avoid unnecessary CPU wakeups 863 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 864 * monitoring on this virtual interface -- i.e. it can monitor 865 * connection quality related parameters, such as the RSSI level and 866 * provide notifications if configured trigger levels are reached. 867 */ 868enum ieee80211_vif_flags { 869 IEEE80211_VIF_BEACON_FILTER = BIT(0), 870 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 871}; 872 873/** 874 * struct ieee80211_vif - per-interface data 875 * 876 * Data in this structure is continually present for driver 877 * use during the life of a virtual interface. 878 * 879 * @type: type of this virtual interface 880 * @bss_conf: BSS configuration for this interface, either our own 881 * or the BSS we're associated to 882 * @addr: address of this interface 883 * @p2p: indicates whether this AP or STA interface is a p2p 884 * interface, i.e. a GO or p2p-sta respectively 885 * @driver_flags: flags/capabilities the driver has for this interface, 886 * these need to be set (or cleared) when the interface is added 887 * or, if supported by the driver, the interface type is changed 888 * at runtime, mac80211 will never touch this field 889 * @drv_priv: data area for driver use, will always be aligned to 890 * sizeof(void *). 891 */ 892struct ieee80211_vif { 893 enum nl80211_iftype type; 894 struct ieee80211_bss_conf bss_conf; 895 u8 addr[ETH_ALEN]; 896 bool p2p; 897 u32 driver_flags; 898 /* must be last */ 899 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 900}; 901 902static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 903{ 904#ifdef CONFIG_MAC80211_MESH 905 return vif->type == NL80211_IFTYPE_MESH_POINT; 906#endif 907 return false; 908} 909 910/** 911 * enum ieee80211_key_flags - key flags 912 * 913 * These flags are used for communication about keys between the driver 914 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 915 * 916 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 917 * that the STA this key will be used with could be using QoS. 918 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 919 * driver to indicate that it requires IV generation for this 920 * particular key. 921 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 922 * the driver for a TKIP key if it requires Michael MIC 923 * generation in software. 924 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 925 * that the key is pairwise rather then a shared key. 926 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 927 * CCMP key if it requires CCMP encryption of management frames (MFP) to 928 * be done in software. 929 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 930 * for a CCMP key if space should be prepared for the IV, but the IV 931 * itself should not be generated. Do not set together with 932 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 933 */ 934enum ieee80211_key_flags { 935 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 936 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 937 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 938 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 939 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 940 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 941}; 942 943/** 944 * struct ieee80211_key_conf - key information 945 * 946 * This key information is given by mac80211 to the driver by 947 * the set_key() callback in &struct ieee80211_ops. 948 * 949 * @hw_key_idx: To be set by the driver, this is the key index the driver 950 * wants to be given when a frame is transmitted and needs to be 951 * encrypted in hardware. 952 * @cipher: The key's cipher suite selector. 953 * @flags: key flags, see &enum ieee80211_key_flags. 954 * @keyidx: the key index (0-3) 955 * @keylen: key material length 956 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 957 * data block: 958 * - Temporal Encryption Key (128 bits) 959 * - Temporal Authenticator Tx MIC Key (64 bits) 960 * - Temporal Authenticator Rx MIC Key (64 bits) 961 * @icv_len: The ICV length for this key type 962 * @iv_len: The IV length for this key type 963 */ 964struct ieee80211_key_conf { 965 u32 cipher; 966 u8 icv_len; 967 u8 iv_len; 968 u8 hw_key_idx; 969 u8 flags; 970 s8 keyidx; 971 u8 keylen; 972 u8 key[0]; 973}; 974 975/** 976 * enum set_key_cmd - key command 977 * 978 * Used with the set_key() callback in &struct ieee80211_ops, this 979 * indicates whether a key is being removed or added. 980 * 981 * @SET_KEY: a key is set 982 * @DISABLE_KEY: a key must be disabled 983 */ 984enum set_key_cmd { 985 SET_KEY, DISABLE_KEY, 986}; 987 988/** 989 * enum ieee80211_sta_state - station state 990 * 991 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 992 * this is a special state for add/remove transitions 993 * @IEEE80211_STA_NONE: station exists without special state 994 * @IEEE80211_STA_AUTH: station is authenticated 995 * @IEEE80211_STA_ASSOC: station is associated 996 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 997 */ 998enum ieee80211_sta_state { 999 /* NOTE: These need to be ordered correctly! */ 1000 IEEE80211_STA_NOTEXIST, 1001 IEEE80211_STA_NONE, 1002 IEEE80211_STA_AUTH, 1003 IEEE80211_STA_ASSOC, 1004 IEEE80211_STA_AUTHORIZED, 1005}; 1006 1007/** 1008 * struct ieee80211_sta - station table entry 1009 * 1010 * A station table entry represents a station we are possibly 1011 * communicating with. Since stations are RCU-managed in 1012 * mac80211, any ieee80211_sta pointer you get access to must 1013 * either be protected by rcu_read_lock() explicitly or implicitly, 1014 * or you must take good care to not use such a pointer after a 1015 * call to your sta_remove callback that removed it. 1016 * 1017 * @addr: MAC address 1018 * @aid: AID we assigned to the station if we're an AP 1019 * @supp_rates: Bitmap of supported rates (per band) 1020 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1021 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1022 * @drv_priv: data area for driver use, will always be aligned to 1023 * sizeof(void *), size is determined in hw information. 1024 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1025 * if wme is supported. 1026 * @max_sp: max Service Period. Only valid if wme is supported. 1027 */ 1028struct ieee80211_sta { 1029 u32 supp_rates[IEEE80211_NUM_BANDS]; 1030 u8 addr[ETH_ALEN]; 1031 u16 aid; 1032 struct ieee80211_sta_ht_cap ht_cap; 1033 bool wme; 1034 u8 uapsd_queues; 1035 u8 max_sp; 1036 1037 /* must be last */ 1038 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 1039}; 1040 1041/** 1042 * enum sta_notify_cmd - sta notify command 1043 * 1044 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1045 * indicates if an associated station made a power state transition. 1046 * 1047 * @STA_NOTIFY_SLEEP: a station is now sleeping 1048 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1049 */ 1050enum sta_notify_cmd { 1051 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1052}; 1053 1054/** 1055 * enum ieee80211_hw_flags - hardware flags 1056 * 1057 * These flags are used to indicate hardware capabilities to 1058 * the stack. Generally, flags here should have their meaning 1059 * done in a way that the simplest hardware doesn't need setting 1060 * any particular flags. There are some exceptions to this rule, 1061 * however, so you are advised to review these flags carefully. 1062 * 1063 * @IEEE80211_HW_HAS_RATE_CONTROL: 1064 * The hardware or firmware includes rate control, and cannot be 1065 * controlled by the stack. As such, no rate control algorithm 1066 * should be instantiated, and the TX rate reported to userspace 1067 * will be taken from the TX status instead of the rate control 1068 * algorithm. 1069 * Note that this requires that the driver implement a number of 1070 * callbacks so it has the correct information, it needs to have 1071 * the @set_rts_threshold callback and must look at the BSS config 1072 * @use_cts_prot for G/N protection, @use_short_slot for slot 1073 * timing in 2.4 GHz and @use_short_preamble for preambles for 1074 * CCK frames. 1075 * 1076 * @IEEE80211_HW_RX_INCLUDES_FCS: 1077 * Indicates that received frames passed to the stack include 1078 * the FCS at the end. 1079 * 1080 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1081 * Some wireless LAN chipsets buffer broadcast/multicast frames 1082 * for power saving stations in the hardware/firmware and others 1083 * rely on the host system for such buffering. This option is used 1084 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1085 * multicast frames when there are power saving stations so that 1086 * the driver can fetch them with ieee80211_get_buffered_bc(). 1087 * 1088 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1089 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1090 * 1091 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1092 * Hardware is not capable of receiving frames with short preamble on 1093 * the 2.4 GHz band. 1094 * 1095 * @IEEE80211_HW_SIGNAL_UNSPEC: 1096 * Hardware can provide signal values but we don't know its units. We 1097 * expect values between 0 and @max_signal. 1098 * If possible please provide dB or dBm instead. 1099 * 1100 * @IEEE80211_HW_SIGNAL_DBM: 1101 * Hardware gives signal values in dBm, decibel difference from 1102 * one milliwatt. This is the preferred method since it is standardized 1103 * between different devices. @max_signal does not need to be set. 1104 * 1105 * @IEEE80211_HW_SPECTRUM_MGMT: 1106 * Hardware supports spectrum management defined in 802.11h 1107 * Measurement, Channel Switch, Quieting, TPC 1108 * 1109 * @IEEE80211_HW_AMPDU_AGGREGATION: 1110 * Hardware supports 11n A-MPDU aggregation. 1111 * 1112 * @IEEE80211_HW_SUPPORTS_PS: 1113 * Hardware has power save support (i.e. can go to sleep). 1114 * 1115 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1116 * Hardware requires nullfunc frame handling in stack, implies 1117 * stack support for dynamic PS. 1118 * 1119 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1120 * Hardware has support for dynamic PS. 1121 * 1122 * @IEEE80211_HW_MFP_CAPABLE: 1123 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1124 * 1125 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1126 * Hardware supports static spatial multiplexing powersave, 1127 * ie. can turn off all but one chain even on HT connections 1128 * that should be using more chains. 1129 * 1130 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1131 * Hardware supports dynamic spatial multiplexing powersave, 1132 * ie. can turn off all but one chain and then wake the rest 1133 * up as required after, for example, rts/cts handshake. 1134 * 1135 * @IEEE80211_HW_SUPPORTS_UAPSD: 1136 * Hardware supports Unscheduled Automatic Power Save Delivery 1137 * (U-APSD) in managed mode. The mode is configured with 1138 * conf_tx() operation. 1139 * 1140 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1141 * Hardware can provide ack status reports of Tx frames to 1142 * the stack. 1143 * 1144 * @IEEE80211_HW_CONNECTION_MONITOR: 1145 * The hardware performs its own connection monitoring, including 1146 * periodic keep-alives to the AP and probing the AP on beacon loss. 1147 * When this flag is set, signaling beacon-loss will cause an immediate 1148 * change to disassociated state. 1149 * 1150 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1151 * This device needs to know the DTIM period for the BSS before 1152 * associating. 1153 * 1154 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1155 * per-station GTKs as used by IBSS RSN or during fast transition. If 1156 * the device doesn't support per-station GTKs, but can be asked not 1157 * to decrypt group addressed frames, then IBSS RSN support is still 1158 * possible but software crypto will be used. Advertise the wiphy flag 1159 * only in that case. 1160 * 1161 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1162 * autonomously manages the PS status of connected stations. When 1163 * this flag is set mac80211 will not trigger PS mode for connected 1164 * stations based on the PM bit of incoming frames. 1165 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1166 * the PS mode of connected stations. 1167 * 1168 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1169 * setup strictly in HW. mac80211 should not attempt to do this in 1170 * software. 1171 * 1172 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1173 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1174 * the scan). 1175 */ 1176enum ieee80211_hw_flags { 1177 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1178 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1179 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1180 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1181 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1182 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1183 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1184 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1185 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1186 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1187 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1188 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1189 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1190 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1191 /* reuse bit 14 */ 1192 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1193 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1194 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1195 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1196 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1197 /* reuse bit 20 */ 1198 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1199 IEEE80211_HW_AP_LINK_PS = 1<<22, 1200 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1201 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1202}; 1203 1204/** 1205 * struct ieee80211_hw - hardware information and state 1206 * 1207 * This structure contains the configuration and hardware 1208 * information for an 802.11 PHY. 1209 * 1210 * @wiphy: This points to the &struct wiphy allocated for this 1211 * 802.11 PHY. You must fill in the @perm_addr and @dev 1212 * members of this structure using SET_IEEE80211_DEV() 1213 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1214 * bands (with channels, bitrates) are registered here. 1215 * 1216 * @conf: &struct ieee80211_conf, device configuration, don't use. 1217 * 1218 * @priv: pointer to private area that was allocated for driver use 1219 * along with this structure. 1220 * 1221 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1222 * 1223 * @extra_tx_headroom: headroom to reserve in each transmit skb 1224 * for use by the driver (e.g. for transmit headers.) 1225 * 1226 * @channel_change_time: time (in microseconds) it takes to change channels. 1227 * 1228 * @max_signal: Maximum value for signal (rssi) in RX information, used 1229 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1230 * 1231 * @max_listen_interval: max listen interval in units of beacon interval 1232 * that HW supports 1233 * 1234 * @queues: number of available hardware transmit queues for 1235 * data packets. WMM/QoS requires at least four, these 1236 * queues need to have configurable access parameters. 1237 * 1238 * @rate_control_algorithm: rate control algorithm for this hardware. 1239 * If unset (NULL), the default algorithm will be used. Must be 1240 * set before calling ieee80211_register_hw(). 1241 * 1242 * @vif_data_size: size (in bytes) of the drv_priv data area 1243 * within &struct ieee80211_vif. 1244 * @sta_data_size: size (in bytes) of the drv_priv data area 1245 * within &struct ieee80211_sta. 1246 * 1247 * @max_rates: maximum number of alternate rate retry stages the hw 1248 * can handle. 1249 * @max_report_rates: maximum number of alternate rate retry stages 1250 * the hw can report back. 1251 * @max_rate_tries: maximum number of tries for each stage 1252 * 1253 * @napi_weight: weight used for NAPI polling. You must specify an 1254 * appropriate value here if a napi_poll operation is provided 1255 * by your driver. 1256 * 1257 * @max_rx_aggregation_subframes: maximum buffer size (number of 1258 * sub-frames) to be used for A-MPDU block ack receiver 1259 * aggregation. 1260 * This is only relevant if the device has restrictions on the 1261 * number of subframes, if it relies on mac80211 to do reordering 1262 * it shouldn't be set. 1263 * 1264 * @max_tx_aggregation_subframes: maximum number of subframes in an 1265 * aggregate an HT driver will transmit, used by the peer as a 1266 * hint to size its reorder buffer. 1267 */ 1268struct ieee80211_hw { 1269 struct ieee80211_conf conf; 1270 struct wiphy *wiphy; 1271 const char *rate_control_algorithm; 1272 void *priv; 1273 u32 flags; 1274 unsigned int extra_tx_headroom; 1275 int channel_change_time; 1276 int vif_data_size; 1277 int sta_data_size; 1278 int napi_weight; 1279 u16 queues; 1280 u16 max_listen_interval; 1281 s8 max_signal; 1282 u8 max_rates; 1283 u8 max_report_rates; 1284 u8 max_rate_tries; 1285 u8 max_rx_aggregation_subframes; 1286 u8 max_tx_aggregation_subframes; 1287}; 1288 1289/** 1290 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1291 * 1292 * @wiphy: the &struct wiphy which we want to query 1293 * 1294 * mac80211 drivers can use this to get to their respective 1295 * &struct ieee80211_hw. Drivers wishing to get to their own private 1296 * structure can then access it via hw->priv. Note that mac802111 drivers should 1297 * not use wiphy_priv() to try to get their private driver structure as this 1298 * is already used internally by mac80211. 1299 */ 1300struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1301 1302/** 1303 * SET_IEEE80211_DEV - set device for 802.11 hardware 1304 * 1305 * @hw: the &struct ieee80211_hw to set the device for 1306 * @dev: the &struct device of this 802.11 device 1307 */ 1308static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1309{ 1310 set_wiphy_dev(hw->wiphy, dev); 1311} 1312 1313/** 1314 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1315 * 1316 * @hw: the &struct ieee80211_hw to set the MAC address for 1317 * @addr: the address to set 1318 */ 1319static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1320{ 1321 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1322} 1323 1324static inline struct ieee80211_rate * 1325ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1326 const struct ieee80211_tx_info *c) 1327{ 1328 if (WARN_ON(c->control.rates[0].idx < 0)) 1329 return NULL; 1330 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1331} 1332 1333static inline struct ieee80211_rate * 1334ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1335 const struct ieee80211_tx_info *c) 1336{ 1337 if (c->control.rts_cts_rate_idx < 0) 1338 return NULL; 1339 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1340} 1341 1342static inline struct ieee80211_rate * 1343ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1344 const struct ieee80211_tx_info *c, int idx) 1345{ 1346 if (c->control.rates[idx + 1].idx < 0) 1347 return NULL; 1348 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1349} 1350 1351/** 1352 * ieee80211_free_txskb - free TX skb 1353 * @hw: the hardware 1354 * @skb: the skb 1355 * 1356 * Free a transmit skb. Use this funtion when some failure 1357 * to transmit happened and thus status cannot be reported. 1358 */ 1359void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1360 1361/** 1362 * DOC: Hardware crypto acceleration 1363 * 1364 * mac80211 is capable of taking advantage of many hardware 1365 * acceleration designs for encryption and decryption operations. 1366 * 1367 * The set_key() callback in the &struct ieee80211_ops for a given 1368 * device is called to enable hardware acceleration of encryption and 1369 * decryption. The callback takes a @sta parameter that will be NULL 1370 * for default keys or keys used for transmission only, or point to 1371 * the station information for the peer for individual keys. 1372 * Multiple transmission keys with the same key index may be used when 1373 * VLANs are configured for an access point. 1374 * 1375 * When transmitting, the TX control data will use the @hw_key_idx 1376 * selected by the driver by modifying the &struct ieee80211_key_conf 1377 * pointed to by the @key parameter to the set_key() function. 1378 * 1379 * The set_key() call for the %SET_KEY command should return 0 if 1380 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1381 * added; if you return 0 then hw_key_idx must be assigned to the 1382 * hardware key index, you are free to use the full u8 range. 1383 * 1384 * When the cmd is %DISABLE_KEY then it must succeed. 1385 * 1386 * Note that it is permissible to not decrypt a frame even if a key 1387 * for it has been uploaded to hardware, the stack will not make any 1388 * decision based on whether a key has been uploaded or not but rather 1389 * based on the receive flags. 1390 * 1391 * The &struct ieee80211_key_conf structure pointed to by the @key 1392 * parameter is guaranteed to be valid until another call to set_key() 1393 * removes it, but it can only be used as a cookie to differentiate 1394 * keys. 1395 * 1396 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1397 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1398 * handler. 1399 * The update_tkip_key() call updates the driver with the new phase 1 key. 1400 * This happens every time the iv16 wraps around (every 65536 packets). The 1401 * set_key() call will happen only once for each key (unless the AP did 1402 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1403 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1404 * handler is software decryption with wrap around of iv16. 1405 */ 1406 1407/** 1408 * DOC: Powersave support 1409 * 1410 * mac80211 has support for various powersave implementations. 1411 * 1412 * First, it can support hardware that handles all powersaving by itself, 1413 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1414 * flag. In that case, it will be told about the desired powersave mode 1415 * with the %IEEE80211_CONF_PS flag depending on the association status. 1416 * The hardware must take care of sending nullfunc frames when necessary, 1417 * i.e. when entering and leaving powersave mode. The hardware is required 1418 * to look at the AID in beacons and signal to the AP that it woke up when 1419 * it finds traffic directed to it. 1420 * 1421 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1422 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1423 * with hardware wakeup and sleep states. Driver is responsible for waking 1424 * up the hardware before issuing commands to the hardware and putting it 1425 * back to sleep at appropriate times. 1426 * 1427 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1428 * buffered multicast/broadcast frames after the beacon. Also it must be 1429 * possible to send frames and receive the acknowledment frame. 1430 * 1431 * Other hardware designs cannot send nullfunc frames by themselves and also 1432 * need software support for parsing the TIM bitmap. This is also supported 1433 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1434 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1435 * required to pass up beacons. The hardware is still required to handle 1436 * waking up for multicast traffic; if it cannot the driver must handle that 1437 * as best as it can, mac80211 is too slow to do that. 1438 * 1439 * Dynamic powersave is an extension to normal powersave in which the 1440 * hardware stays awake for a user-specified period of time after sending a 1441 * frame so that reply frames need not be buffered and therefore delayed to 1442 * the next wakeup. It's compromise of getting good enough latency when 1443 * there's data traffic and still saving significantly power in idle 1444 * periods. 1445 * 1446 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1447 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1448 * flag and mac80211 will handle everything automatically. Additionally, 1449 * hardware having support for the dynamic PS feature may set the 1450 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1451 * dynamic PS mode itself. The driver needs to look at the 1452 * @dynamic_ps_timeout hardware configuration value and use it that value 1453 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1454 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1455 * enabled whenever user has enabled powersave. 1456 * 1457 * Some hardware need to toggle a single shared antenna between WLAN and 1458 * Bluetooth to facilitate co-existence. These types of hardware set 1459 * limitations on the use of host controlled dynamic powersave whenever there 1460 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1461 * driver may request temporarily going into full power save, in order to 1462 * enable toggling the antenna between BT and WLAN. If the driver requests 1463 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1464 * temporarily set to zero until the driver re-enables dynamic powersave. 1465 * 1466 * Driver informs U-APSD client support by enabling 1467 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1468 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1469 * Nullfunc frames and stay awake until the service period has ended. To 1470 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1471 * from that AC are transmitted with powersave enabled. 1472 * 1473 * Note: U-APSD client mode is not yet supported with 1474 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1475 */ 1476 1477/** 1478 * DOC: Beacon filter support 1479 * 1480 * Some hardware have beacon filter support to reduce host cpu wakeups 1481 * which will reduce system power consumption. It usually works so that 1482 * the firmware creates a checksum of the beacon but omits all constantly 1483 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1484 * beacon is forwarded to the host, otherwise it will be just dropped. That 1485 * way the host will only receive beacons where some relevant information 1486 * (for example ERP protection or WMM settings) have changed. 1487 * 1488 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1489 * interface capability. The driver needs to enable beacon filter support 1490 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1491 * power save is enabled, the stack will not check for beacon loss and the 1492 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1493 * 1494 * The time (or number of beacons missed) until the firmware notifies the 1495 * driver of a beacon loss event (which in turn causes the driver to call 1496 * ieee80211_beacon_loss()) should be configurable and will be controlled 1497 * by mac80211 and the roaming algorithm in the future. 1498 * 1499 * Since there may be constantly changing information elements that nothing 1500 * in the software stack cares about, we will, in the future, have mac80211 1501 * tell the driver which information elements are interesting in the sense 1502 * that we want to see changes in them. This will include 1503 * - a list of information element IDs 1504 * - a list of OUIs for the vendor information element 1505 * 1506 * Ideally, the hardware would filter out any beacons without changes in the 1507 * requested elements, but if it cannot support that it may, at the expense 1508 * of some efficiency, filter out only a subset. For example, if the device 1509 * doesn't support checking for OUIs it should pass up all changes in all 1510 * vendor information elements. 1511 * 1512 * Note that change, for the sake of simplification, also includes information 1513 * elements appearing or disappearing from the beacon. 1514 * 1515 * Some hardware supports an "ignore list" instead, just make sure nothing 1516 * that was requested is on the ignore list, and include commonly changing 1517 * information element IDs in the ignore list, for example 11 (BSS load) and 1518 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1519 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1520 * it could also include some currently unused IDs. 1521 * 1522 * 1523 * In addition to these capabilities, hardware should support notifying the 1524 * host of changes in the beacon RSSI. This is relevant to implement roaming 1525 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1526 * the received data packets). This can consist in notifying the host when 1527 * the RSSI changes significantly or when it drops below or rises above 1528 * configurable thresholds. In the future these thresholds will also be 1529 * configured by mac80211 (which gets them from userspace) to implement 1530 * them as the roaming algorithm requires. 1531 * 1532 * If the hardware cannot implement this, the driver should ask it to 1533 * periodically pass beacon frames to the host so that software can do the 1534 * signal strength threshold checking. 1535 */ 1536 1537/** 1538 * DOC: Spatial multiplexing power save 1539 * 1540 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1541 * power in an 802.11n implementation. For details on the mechanism 1542 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1543 * "11.2.3 SM power save". 1544 * 1545 * The mac80211 implementation is capable of sending action frames 1546 * to update the AP about the station's SMPS mode, and will instruct 1547 * the driver to enter the specific mode. It will also announce the 1548 * requested SMPS mode during the association handshake. Hardware 1549 * support for this feature is required, and can be indicated by 1550 * hardware flags. 1551 * 1552 * The default mode will be "automatic", which nl80211/cfg80211 1553 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1554 * turned off otherwise. 1555 * 1556 * To support this feature, the driver must set the appropriate 1557 * hardware support flags, and handle the SMPS flag to the config() 1558 * operation. It will then with this mechanism be instructed to 1559 * enter the requested SMPS mode while associated to an HT AP. 1560 */ 1561 1562/** 1563 * DOC: Frame filtering 1564 * 1565 * mac80211 requires to see many management frames for proper 1566 * operation, and users may want to see many more frames when 1567 * in monitor mode. However, for best CPU usage and power consumption, 1568 * having as few frames as possible percolate through the stack is 1569 * desirable. Hence, the hardware should filter as much as possible. 1570 * 1571 * To achieve this, mac80211 uses filter flags (see below) to tell 1572 * the driver's configure_filter() function which frames should be 1573 * passed to mac80211 and which should be filtered out. 1574 * 1575 * Before configure_filter() is invoked, the prepare_multicast() 1576 * callback is invoked with the parameters @mc_count and @mc_list 1577 * for the combined multicast address list of all virtual interfaces. 1578 * It's use is optional, and it returns a u64 that is passed to 1579 * configure_filter(). Additionally, configure_filter() has the 1580 * arguments @changed_flags telling which flags were changed and 1581 * @total_flags with the new flag states. 1582 * 1583 * If your device has no multicast address filters your driver will 1584 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1585 * parameter to see whether multicast frames should be accepted 1586 * or dropped. 1587 * 1588 * All unsupported flags in @total_flags must be cleared. 1589 * Hardware does not support a flag if it is incapable of _passing_ 1590 * the frame to the stack. Otherwise the driver must ignore 1591 * the flag, but not clear it. 1592 * You must _only_ clear the flag (announce no support for the 1593 * flag to mac80211) if you are not able to pass the packet type 1594 * to the stack (so the hardware always filters it). 1595 * So for example, you should clear @FIF_CONTROL, if your hardware 1596 * always filters control frames. If your hardware always passes 1597 * control frames to the kernel and is incapable of filtering them, 1598 * you do _not_ clear the @FIF_CONTROL flag. 1599 * This rule applies to all other FIF flags as well. 1600 */ 1601 1602/** 1603 * DOC: AP support for powersaving clients 1604 * 1605 * In order to implement AP and P2P GO modes, mac80211 has support for 1606 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1607 * There currently is no support for sAPSD. 1608 * 1609 * There is one assumption that mac80211 makes, namely that a client 1610 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1611 * Both are supported, and both can be used by the same client, but 1612 * they can't be used concurrently by the same client. This simplifies 1613 * the driver code. 1614 * 1615 * The first thing to keep in mind is that there is a flag for complete 1616 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1617 * mac80211 expects the driver to handle most of the state machine for 1618 * powersaving clients and will ignore the PM bit in incoming frames. 1619 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1620 * stations' powersave transitions. In this mode, mac80211 also doesn't 1621 * handle PS-Poll/uAPSD. 1622 * 1623 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1624 * PM bit in incoming frames for client powersave transitions. When a 1625 * station goes to sleep, we will stop transmitting to it. There is, 1626 * however, a race condition: a station might go to sleep while there is 1627 * data buffered on hardware queues. If the device has support for this 1628 * it will reject frames, and the driver should give the frames back to 1629 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1630 * cause mac80211 to retry the frame when the station wakes up. The 1631 * driver is also notified of powersave transitions by calling its 1632 * @sta_notify callback. 1633 * 1634 * When the station is asleep, it has three choices: it can wake up, 1635 * it can PS-Poll, or it can possibly start a uAPSD service period. 1636 * Waking up is implemented by simply transmitting all buffered (and 1637 * filtered) frames to the station. This is the easiest case. When 1638 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1639 * will inform the driver of this with the @allow_buffered_frames 1640 * callback; this callback is optional. mac80211 will then transmit 1641 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1642 * on each frame. The last frame in the service period (or the only 1643 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1644 * indicate that it ends the service period; as this frame must have 1645 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1646 * When TX status is reported for this frame, the service period is 1647 * marked has having ended and a new one can be started by the peer. 1648 * 1649 * Additionally, non-bufferable MMPDUs can also be transmitted by 1650 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1651 * 1652 * Another race condition can happen on some devices like iwlwifi 1653 * when there are frames queued for the station and it wakes up 1654 * or polls; the frames that are already queued could end up being 1655 * transmitted first instead, causing reordering and/or wrong 1656 * processing of the EOSP. The cause is that allowing frames to be 1657 * transmitted to a certain station is out-of-band communication to 1658 * the device. To allow this problem to be solved, the driver can 1659 * call ieee80211_sta_block_awake() if frames are buffered when it 1660 * is notified that the station went to sleep. When all these frames 1661 * have been filtered (see above), it must call the function again 1662 * to indicate that the station is no longer blocked. 1663 * 1664 * If the driver buffers frames in the driver for aggregation in any 1665 * way, it must use the ieee80211_sta_set_buffered() call when it is 1666 * notified of the station going to sleep to inform mac80211 of any 1667 * TIDs that have frames buffered. Note that when a station wakes up 1668 * this information is reset (hence the requirement to call it when 1669 * informed of the station going to sleep). Then, when a service 1670 * period starts for any reason, @release_buffered_frames is called 1671 * with the number of frames to be released and which TIDs they are 1672 * to come from. In this case, the driver is responsible for setting 1673 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1674 * to help the @more_data paramter is passed to tell the driver if 1675 * there is more data on other TIDs -- the TIDs to release frames 1676 * from are ignored since mac80211 doesn't know how many frames the 1677 * buffers for those TIDs contain. 1678 * 1679 * If the driver also implement GO mode, where absence periods may 1680 * shorten service periods (or abort PS-Poll responses), it must 1681 * filter those response frames except in the case of frames that 1682 * are buffered in the driver -- those must remain buffered to avoid 1683 * reordering. Because it is possible that no frames are released 1684 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1685 * to indicate to mac80211 that the service period ended anyway. 1686 * 1687 * Finally, if frames from multiple TIDs are released from mac80211 1688 * but the driver might reorder them, it must clear & set the flags 1689 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1690 * and also take care of the EOSP and MORE_DATA bits in the frame. 1691 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1692 */ 1693 1694/** 1695 * enum ieee80211_filter_flags - hardware filter flags 1696 * 1697 * These flags determine what the filter in hardware should be 1698 * programmed to let through and what should not be passed to the 1699 * stack. It is always safe to pass more frames than requested, 1700 * but this has negative impact on power consumption. 1701 * 1702 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1703 * think of the BSS as your network segment and then this corresponds 1704 * to the regular ethernet device promiscuous mode. 1705 * 1706 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1707 * by the user or if the hardware is not capable of filtering by 1708 * multicast address. 1709 * 1710 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1711 * %RX_FLAG_FAILED_FCS_CRC for them) 1712 * 1713 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1714 * the %RX_FLAG_FAILED_PLCP_CRC for them 1715 * 1716 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1717 * to the hardware that it should not filter beacons or probe responses 1718 * by BSSID. Filtering them can greatly reduce the amount of processing 1719 * mac80211 needs to do and the amount of CPU wakeups, so you should 1720 * honour this flag if possible. 1721 * 1722 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1723 * is not set then only those addressed to this station. 1724 * 1725 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1726 * 1727 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1728 * those addressed to this station. 1729 * 1730 * @FIF_PROBE_REQ: pass probe request frames 1731 */ 1732enum ieee80211_filter_flags { 1733 FIF_PROMISC_IN_BSS = 1<<0, 1734 FIF_ALLMULTI = 1<<1, 1735 FIF_FCSFAIL = 1<<2, 1736 FIF_PLCPFAIL = 1<<3, 1737 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1738 FIF_CONTROL = 1<<5, 1739 FIF_OTHER_BSS = 1<<6, 1740 FIF_PSPOLL = 1<<7, 1741 FIF_PROBE_REQ = 1<<8, 1742}; 1743 1744/** 1745 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1746 * 1747 * These flags are used with the ampdu_action() callback in 1748 * &struct ieee80211_ops to indicate which action is needed. 1749 * 1750 * Note that drivers MUST be able to deal with a TX aggregation 1751 * session being stopped even before they OK'ed starting it by 1752 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1753 * might receive the addBA frame and send a delBA right away! 1754 * 1755 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1756 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1757 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1758 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1759 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1760 */ 1761enum ieee80211_ampdu_mlme_action { 1762 IEEE80211_AMPDU_RX_START, 1763 IEEE80211_AMPDU_RX_STOP, 1764 IEEE80211_AMPDU_TX_START, 1765 IEEE80211_AMPDU_TX_STOP, 1766 IEEE80211_AMPDU_TX_OPERATIONAL, 1767}; 1768 1769/** 1770 * enum ieee80211_frame_release_type - frame release reason 1771 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 1772 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 1773 * frame received on trigger-enabled AC 1774 */ 1775enum ieee80211_frame_release_type { 1776 IEEE80211_FRAME_RELEASE_PSPOLL, 1777 IEEE80211_FRAME_RELEASE_UAPSD, 1778}; 1779 1780/** 1781 * struct ieee80211_ops - callbacks from mac80211 to the driver 1782 * 1783 * This structure contains various callbacks that the driver may 1784 * handle or, in some cases, must handle, for example to configure 1785 * the hardware to a new channel or to transmit a frame. 1786 * 1787 * @tx: Handler that 802.11 module calls for each transmitted frame. 1788 * skb contains the buffer starting from the IEEE 802.11 header. 1789 * The low-level driver should send the frame out based on 1790 * configuration in the TX control data. This handler should, 1791 * preferably, never fail and stop queues appropriately. 1792 * This must be implemented if @tx_frags is not. 1793 * Must be atomic. 1794 * 1795 * @tx_frags: Called to transmit multiple fragments of a single MSDU. 1796 * This handler must consume all fragments, sending out some of 1797 * them only is useless and it can't ask for some of them to be 1798 * queued again. If the frame is not fragmented the queue has a 1799 * single SKB only. To avoid issues with the networking stack 1800 * when TX status is reported the frames should be removed from 1801 * the skb queue. 1802 * If this is used, the tx_info @vif and @sta pointers will be 1803 * invalid -- you must not use them in that case. 1804 * This must be implemented if @tx isn't. 1805 * Must be atomic. 1806 * 1807 * @start: Called before the first netdevice attached to the hardware 1808 * is enabled. This should turn on the hardware and must turn on 1809 * frame reception (for possibly enabled monitor interfaces.) 1810 * Returns negative error codes, these may be seen in userspace, 1811 * or zero. 1812 * When the device is started it should not have a MAC address 1813 * to avoid acknowledging frames before a non-monitor device 1814 * is added. 1815 * Must be implemented and can sleep. 1816 * 1817 * @stop: Called after last netdevice attached to the hardware 1818 * is disabled. This should turn off the hardware (at least 1819 * it must turn off frame reception.) 1820 * May be called right after add_interface if that rejects 1821 * an interface. If you added any work onto the mac80211 workqueue 1822 * you should ensure to cancel it on this callback. 1823 * Must be implemented and can sleep. 1824 * 1825 * @suspend: Suspend the device; mac80211 itself will quiesce before and 1826 * stop transmitting and doing any other configuration, and then 1827 * ask the device to suspend. This is only invoked when WoWLAN is 1828 * configured, otherwise the device is deconfigured completely and 1829 * reconfigured at resume time. 1830 * The driver may also impose special conditions under which it 1831 * wants to use the "normal" suspend (deconfigure), say if it only 1832 * supports WoWLAN when the device is associated. In this case, it 1833 * must return 1 from this function. 1834 * 1835 * @resume: If WoWLAN was configured, this indicates that mac80211 is 1836 * now resuming its operation, after this the device must be fully 1837 * functional again. If this returns an error, the only way out is 1838 * to also unregister the device. If it returns 1, then mac80211 1839 * will also go through the regular complete restart on resume. 1840 * 1841 * @add_interface: Called when a netdevice attached to the hardware is 1842 * enabled. Because it is not called for monitor mode devices, @start 1843 * and @stop must be implemented. 1844 * The driver should perform any initialization it needs before 1845 * the device can be enabled. The initial configuration for the 1846 * interface is given in the conf parameter. 1847 * The callback may refuse to add an interface by returning a 1848 * negative error code (which will be seen in userspace.) 1849 * Must be implemented and can sleep. 1850 * 1851 * @change_interface: Called when a netdevice changes type. This callback 1852 * is optional, but only if it is supported can interface types be 1853 * switched while the interface is UP. The callback may sleep. 1854 * Note that while an interface is being switched, it will not be 1855 * found by the interface iteration callbacks. 1856 * 1857 * @remove_interface: Notifies a driver that an interface is going down. 1858 * The @stop callback is called after this if it is the last interface 1859 * and no monitor interfaces are present. 1860 * When all interfaces are removed, the MAC address in the hardware 1861 * must be cleared so the device no longer acknowledges packets, 1862 * the mac_addr member of the conf structure is, however, set to the 1863 * MAC address of the device going away. 1864 * Hence, this callback must be implemented. It can sleep. 1865 * 1866 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1867 * function to change hardware configuration, e.g., channel. 1868 * This function should never fail but returns a negative error code 1869 * if it does. The callback can sleep. 1870 * 1871 * @bss_info_changed: Handler for configuration requests related to BSS 1872 * parameters that may vary during BSS's lifespan, and may affect low 1873 * level driver (e.g. assoc/disassoc status, erp parameters). 1874 * This function should not be used if no BSS has been set, unless 1875 * for association indication. The @changed parameter indicates which 1876 * of the bss parameters has changed when a call is made. The callback 1877 * can sleep. 1878 * 1879 * @prepare_multicast: Prepare for multicast filter configuration. 1880 * This callback is optional, and its return value is passed 1881 * to configure_filter(). This callback must be atomic. 1882 * 1883 * @configure_filter: Configure the device's RX filter. 1884 * See the section "Frame filtering" for more information. 1885 * This callback must be implemented and can sleep. 1886 * 1887 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1888 * must be set or cleared for a given STA. Must be atomic. 1889 * 1890 * @set_key: See the section "Hardware crypto acceleration" 1891 * This callback is only called between add_interface and 1892 * remove_interface calls, i.e. while the given virtual interface 1893 * is enabled. 1894 * Returns a negative error code if the key can't be added. 1895 * The callback can sleep. 1896 * 1897 * @update_tkip_key: See the section "Hardware crypto acceleration" 1898 * This callback will be called in the context of Rx. Called for drivers 1899 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1900 * The callback must be atomic. 1901 * 1902 * @set_rekey_data: If the device supports GTK rekeying, for example while the 1903 * host is suspended, it can assign this callback to retrieve the data 1904 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 1905 * After rekeying was done it should (for example during resume) notify 1906 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 1907 * 1908 * @hw_scan: Ask the hardware to service the scan request, no need to start 1909 * the scan state machine in stack. The scan must honour the channel 1910 * configuration done by the regulatory agent in the wiphy's 1911 * registered bands. The hardware (or the driver) needs to make sure 1912 * that power save is disabled. 1913 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1914 * entire IEs after the SSID, so that drivers need not look at these 1915 * at all but just send them after the SSID -- mac80211 includes the 1916 * (extended) supported rates and HT information (where applicable). 1917 * When the scan finishes, ieee80211_scan_completed() must be called; 1918 * note that it also must be called when the scan cannot finish due to 1919 * any error unless this callback returned a negative error code. 1920 * The callback can sleep. 1921 * 1922 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 1923 * The driver should ask the hardware to cancel the scan (if possible), 1924 * but the scan will be completed only after the driver will call 1925 * ieee80211_scan_completed(). 1926 * This callback is needed for wowlan, to prevent enqueueing a new 1927 * scan_work after the low-level driver was already suspended. 1928 * The callback can sleep. 1929 * 1930 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 1931 * specific intervals. The driver must call the 1932 * ieee80211_sched_scan_results() function whenever it finds results. 1933 * This process will continue until sched_scan_stop is called. 1934 * 1935 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 1936 * 1937 * @sw_scan_start: Notifier function that is called just before a software scan 1938 * is started. Can be NULL, if the driver doesn't need this notification. 1939 * The callback can sleep. 1940 * 1941 * @sw_scan_complete: Notifier function that is called just after a 1942 * software scan finished. Can be NULL, if the driver doesn't need 1943 * this notification. 1944 * The callback can sleep. 1945 * 1946 * @get_stats: Return low-level statistics. 1947 * Returns zero if statistics are available. 1948 * The callback can sleep. 1949 * 1950 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1951 * callback should be provided to read the TKIP transmit IVs (both IV32 1952 * and IV16) for the given key from hardware. 1953 * The callback must be atomic. 1954 * 1955 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 1956 * if the device does fragmentation by itself; if this callback is 1957 * implemented then the stack will not do fragmentation. 1958 * The callback can sleep. 1959 * 1960 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1961 * The callback can sleep. 1962 * 1963 * @sta_add: Notifies low level driver about addition of an associated station, 1964 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1965 * 1966 * @sta_remove: Notifies low level driver about removal of an associated 1967 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1968 * 1969 * @sta_notify: Notifies low level driver about power state transition of an 1970 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 1971 * in AP mode, this callback will not be called when the flag 1972 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 1973 * 1974 * @sta_state: Notifies low level driver about state transition of a 1975 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 1976 * This callback is mutually exclusive with @sta_add/@sta_remove. 1977 * It must not fail for down transitions but may fail for transitions 1978 * up the list of states. 1979 * The callback can sleep. 1980 * 1981 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1982 * bursting) for a hardware TX queue. 1983 * Returns a negative error code on failure. 1984 * The callback can sleep. 1985 * 1986 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1987 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1988 * required function. 1989 * The callback can sleep. 1990 * 1991 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1992 * Currently, this is only used for IBSS mode debugging. Is not a 1993 * required function. 1994 * The callback can sleep. 1995 * 1996 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1997 * with other STAs in the IBSS. This is only used in IBSS mode. This 1998 * function is optional if the firmware/hardware takes full care of 1999 * TSF synchronization. 2000 * The callback can sleep. 2001 * 2002 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2003 * This is needed only for IBSS mode and the result of this function is 2004 * used to determine whether to reply to Probe Requests. 2005 * Returns non-zero if this device sent the last beacon. 2006 * The callback can sleep. 2007 * 2008 * @ampdu_action: Perform a certain A-MPDU action 2009 * The RA/TID combination determines the destination and TID we want 2010 * the ampdu action to be performed for. The action is defined through 2011 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2012 * is the first frame we expect to perform the action on. Notice 2013 * that TX/RX_STOP can pass NULL for this parameter. 2014 * The @buf_size parameter is only valid when the action is set to 2015 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2016 * buffer size (number of subframes) for this session -- the driver 2017 * may neither send aggregates containing more subframes than this 2018 * nor send aggregates in a way that lost frames would exceed the 2019 * buffer size. If just limiting the aggregate size, this would be 2020 * possible with a buf_size of 8: 2021 * - TX: 1.....7 2022 * - RX: 2....7 (lost frame #1) 2023 * - TX: 8..1... 2024 * which is invalid since #1 was now re-transmitted well past the 2025 * buffer size of 8. Correct ways to retransmit #1 would be: 2026 * - TX: 1 or 18 or 81 2027 * Even "189" would be wrong since 1 could be lost again. 2028 * 2029 * Returns a negative error code on failure. 2030 * The callback can sleep. 2031 * 2032 * @get_survey: Return per-channel survey information 2033 * 2034 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2035 * need to set wiphy->rfkill_poll to %true before registration, 2036 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2037 * The callback can sleep. 2038 * 2039 * @set_coverage_class: Set slot time for given coverage class as specified 2040 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2041 * accordingly. This callback is not required and may sleep. 2042 * 2043 * @testmode_cmd: Implement a cfg80211 test mode command. 2044 * The callback can sleep. 2045 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2046 * 2047 * @flush: Flush all pending frames from the hardware queue, making sure 2048 * that the hardware queues are empty. If the parameter @drop is set 2049 * to %true, pending frames may be dropped. The callback can sleep. 2050 * 2051 * @channel_switch: Drivers that need (or want) to offload the channel 2052 * switch operation for CSAs received from the AP may implement this 2053 * callback. They must then call ieee80211_chswitch_done() to indicate 2054 * completion of the channel switch. 2055 * 2056 * @napi_poll: Poll Rx queue for incoming data frames. 2057 * 2058 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2059 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2060 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2061 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2062 * 2063 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2064 * 2065 * @remain_on_channel: Starts an off-channel period on the given channel, must 2066 * call back to ieee80211_ready_on_channel() when on that channel. Note 2067 * that normal channel traffic is not stopped as this is intended for hw 2068 * offload. Frames to transmit on the off-channel channel are transmitted 2069 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2070 * duration (which will always be non-zero) expires, the driver must call 2071 * ieee80211_remain_on_channel_expired(). This callback may sleep. 2072 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2073 * aborted before it expires. This callback may sleep. 2074 * 2075 * @set_ringparam: Set tx and rx ring sizes. 2076 * 2077 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2078 * 2079 * @tx_frames_pending: Check if there is any pending frame in the hardware 2080 * queues before entering power save. 2081 * 2082 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2083 * when transmitting a frame. Currently only legacy rates are handled. 2084 * The callback can sleep. 2085 * @rssi_callback: Notify driver when the average RSSI goes above/below 2086 * thresholds that were registered previously. The callback can sleep. 2087 * 2088 * @release_buffered_frames: Release buffered frames according to the given 2089 * parameters. In the case where the driver buffers some frames for 2090 * sleeping stations mac80211 will use this callback to tell the driver 2091 * to release some frames, either for PS-poll or uAPSD. 2092 * Note that if the @more_data paramter is %false the driver must check 2093 * if there are more frames on the given TIDs, and if there are more than 2094 * the frames being released then it must still set the more-data bit in 2095 * the frame. If the @more_data parameter is %true, then of course the 2096 * more-data bit must always be set. 2097 * The @tids parameter tells the driver which TIDs to release frames 2098 * from, for PS-poll it will always have only a single bit set. 2099 * In the case this is used for a PS-poll initiated release, the 2100 * @num_frames parameter will always be 1 so code can be shared. In 2101 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2102 * on the TX status (and must report TX status) so that the PS-poll 2103 * period is properly ended. This is used to avoid sending multiple 2104 * responses for a retried PS-poll frame. 2105 * In the case this is used for uAPSD, the @num_frames parameter may be 2106 * bigger than one, but the driver may send fewer frames (it must send 2107 * at least one, however). In this case it is also responsible for 2108 * setting the EOSP flag in the QoS header of the frames. Also, when the 2109 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2110 * on the last frame in the SP. Alternatively, it may call the function 2111 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2112 * This callback must be atomic. 2113 * @allow_buffered_frames: Prepare device to allow the given number of frames 2114 * to go out to the given station. The frames will be sent by mac80211 2115 * via the usual TX path after this call. The TX information for frames 2116 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2117 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2118 * frames from multiple TIDs are released and the driver might reorder 2119 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2120 * on the last frame and clear it on all others and also handle the EOSP 2121 * bit in the QoS header correctly. Alternatively, it can also call the 2122 * ieee80211_sta_eosp_irqsafe() function. 2123 * The @tids parameter is a bitmap and tells the driver which TIDs the 2124 * frames will be on; it will at most have two bits set. 2125 * This callback must be atomic. 2126 */ 2127struct ieee80211_ops { 2128 void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 2129 void (*tx_frags)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2130 struct ieee80211_sta *sta, struct sk_buff_head *skbs); 2131 int (*start)(struct ieee80211_hw *hw); 2132 void (*stop)(struct ieee80211_hw *hw); 2133#ifdef CONFIG_PM 2134 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2135 int (*resume)(struct ieee80211_hw *hw); 2136#endif 2137 int (*add_interface)(struct ieee80211_hw *hw, 2138 struct ieee80211_vif *vif); 2139 int (*change_interface)(struct ieee80211_hw *hw, 2140 struct ieee80211_vif *vif, 2141 enum nl80211_iftype new_type, bool p2p); 2142 void (*remove_interface)(struct ieee80211_hw *hw, 2143 struct ieee80211_vif *vif); 2144 int (*config)(struct ieee80211_hw *hw, u32 changed); 2145 void (*bss_info_changed)(struct ieee80211_hw *hw, 2146 struct ieee80211_vif *vif, 2147 struct ieee80211_bss_conf *info, 2148 u32 changed); 2149 2150 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2151 struct netdev_hw_addr_list *mc_list); 2152 void (*configure_filter)(struct ieee80211_hw *hw, 2153 unsigned int changed_flags, 2154 unsigned int *total_flags, 2155 u64 multicast); 2156 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2157 bool set); 2158 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2159 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2160 struct ieee80211_key_conf *key); 2161 void (*update_tkip_key)(struct ieee80211_hw *hw, 2162 struct ieee80211_vif *vif, 2163 struct ieee80211_key_conf *conf, 2164 struct ieee80211_sta *sta, 2165 u32 iv32, u16 *phase1key); 2166 void (*set_rekey_data)(struct ieee80211_hw *hw, 2167 struct ieee80211_vif *vif, 2168 struct cfg80211_gtk_rekey_data *data); 2169 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2170 struct cfg80211_scan_request *req); 2171 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2172 struct ieee80211_vif *vif); 2173 int (*sched_scan_start)(struct ieee80211_hw *hw, 2174 struct ieee80211_vif *vif, 2175 struct cfg80211_sched_scan_request *req, 2176 struct ieee80211_sched_scan_ies *ies); 2177 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2178 struct ieee80211_vif *vif); 2179 void (*sw_scan_start)(struct ieee80211_hw *hw); 2180 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2181 int (*get_stats)(struct ieee80211_hw *hw, 2182 struct ieee80211_low_level_stats *stats); 2183 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2184 u32 *iv32, u16 *iv16); 2185 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2186 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2187 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2188 struct ieee80211_sta *sta); 2189 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2190 struct ieee80211_sta *sta); 2191 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2192 enum sta_notify_cmd, struct ieee80211_sta *sta); 2193 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2194 struct ieee80211_sta *sta, 2195 enum ieee80211_sta_state old_state, 2196 enum ieee80211_sta_state new_state); 2197 int (*conf_tx)(struct ieee80211_hw *hw, 2198 struct ieee80211_vif *vif, u16 queue, 2199 const struct ieee80211_tx_queue_params *params); 2200 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2201 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2202 u64 tsf); 2203 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2204 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2205 int (*ampdu_action)(struct ieee80211_hw *hw, 2206 struct ieee80211_vif *vif, 2207 enum ieee80211_ampdu_mlme_action action, 2208 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2209 u8 buf_size); 2210 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2211 struct survey_info *survey); 2212 void (*rfkill_poll)(struct ieee80211_hw *hw); 2213 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2214#ifdef CONFIG_NL80211_TESTMODE 2215 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2216 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2217 struct netlink_callback *cb, 2218 void *data, int len); 2219#endif 2220 void (*flush)(struct ieee80211_hw *hw, bool drop); 2221 void (*channel_switch)(struct ieee80211_hw *hw, 2222 struct ieee80211_channel_switch *ch_switch); 2223 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2224 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2225 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2226 2227 int (*remain_on_channel)(struct ieee80211_hw *hw, 2228 struct ieee80211_channel *chan, 2229 enum nl80211_channel_type channel_type, 2230 int duration); 2231 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2232 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2233 void (*get_ringparam)(struct ieee80211_hw *hw, 2234 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2235 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2236 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2237 const struct cfg80211_bitrate_mask *mask); 2238 void (*rssi_callback)(struct ieee80211_hw *hw, 2239 enum ieee80211_rssi_event rssi_event); 2240 2241 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2242 struct ieee80211_sta *sta, 2243 u16 tids, int num_frames, 2244 enum ieee80211_frame_release_type reason, 2245 bool more_data); 2246 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2247 struct ieee80211_sta *sta, 2248 u16 tids, int num_frames, 2249 enum ieee80211_frame_release_type reason, 2250 bool more_data); 2251}; 2252 2253/** 2254 * ieee80211_alloc_hw - Allocate a new hardware device 2255 * 2256 * This must be called once for each hardware device. The returned pointer 2257 * must be used to refer to this device when calling other functions. 2258 * mac80211 allocates a private data area for the driver pointed to by 2259 * @priv in &struct ieee80211_hw, the size of this area is given as 2260 * @priv_data_len. 2261 * 2262 * @priv_data_len: length of private data 2263 * @ops: callbacks for this device 2264 */ 2265struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2266 const struct ieee80211_ops *ops); 2267 2268/** 2269 * ieee80211_register_hw - Register hardware device 2270 * 2271 * You must call this function before any other functions in 2272 * mac80211. Note that before a hardware can be registered, you 2273 * need to fill the contained wiphy's information. 2274 * 2275 * @hw: the device to register as returned by ieee80211_alloc_hw() 2276 */ 2277int ieee80211_register_hw(struct ieee80211_hw *hw); 2278 2279/** 2280 * struct ieee80211_tpt_blink - throughput blink description 2281 * @throughput: throughput in Kbit/sec 2282 * @blink_time: blink time in milliseconds 2283 * (full cycle, ie. one off + one on period) 2284 */ 2285struct ieee80211_tpt_blink { 2286 int throughput; 2287 int blink_time; 2288}; 2289 2290/** 2291 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2292 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2293 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2294 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2295 * interface is connected in some way, including being an AP 2296 */ 2297enum ieee80211_tpt_led_trigger_flags { 2298 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2299 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2300 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2301}; 2302 2303#ifdef CONFIG_MAC80211_LEDS 2304extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2305extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2306extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2307extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2308extern char *__ieee80211_create_tpt_led_trigger( 2309 struct ieee80211_hw *hw, unsigned int flags, 2310 const struct ieee80211_tpt_blink *blink_table, 2311 unsigned int blink_table_len); 2312#endif 2313/** 2314 * ieee80211_get_tx_led_name - get name of TX LED 2315 * 2316 * mac80211 creates a transmit LED trigger for each wireless hardware 2317 * that can be used to drive LEDs if your driver registers a LED device. 2318 * This function returns the name (or %NULL if not configured for LEDs) 2319 * of the trigger so you can automatically link the LED device. 2320 * 2321 * @hw: the hardware to get the LED trigger name for 2322 */ 2323static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2324{ 2325#ifdef CONFIG_MAC80211_LEDS 2326 return __ieee80211_get_tx_led_name(hw); 2327#else 2328 return NULL; 2329#endif 2330} 2331 2332/** 2333 * ieee80211_get_rx_led_name - get name of RX LED 2334 * 2335 * mac80211 creates a receive LED trigger for each wireless hardware 2336 * that can be used to drive LEDs if your driver registers a LED device. 2337 * This function returns the name (or %NULL if not configured for LEDs) 2338 * of the trigger so you can automatically link the LED device. 2339 * 2340 * @hw: the hardware to get the LED trigger name for 2341 */ 2342static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2343{ 2344#ifdef CONFIG_MAC80211_LEDS 2345 return __ieee80211_get_rx_led_name(hw); 2346#else 2347 return NULL; 2348#endif 2349} 2350 2351/** 2352 * ieee80211_get_assoc_led_name - get name of association LED 2353 * 2354 * mac80211 creates a association LED trigger for each wireless hardware 2355 * that can be used to drive LEDs if your driver registers a LED device. 2356 * This function returns the name (or %NULL if not configured for LEDs) 2357 * of the trigger so you can automatically link the LED device. 2358 * 2359 * @hw: the hardware to get the LED trigger name for 2360 */ 2361static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2362{ 2363#ifdef CONFIG_MAC80211_LEDS 2364 return __ieee80211_get_assoc_led_name(hw); 2365#else 2366 return NULL; 2367#endif 2368} 2369 2370/** 2371 * ieee80211_get_radio_led_name - get name of radio LED 2372 * 2373 * mac80211 creates a radio change LED trigger for each wireless hardware 2374 * that can be used to drive LEDs if your driver registers a LED device. 2375 * This function returns the name (or %NULL if not configured for LEDs) 2376 * of the trigger so you can automatically link the LED device. 2377 * 2378 * @hw: the hardware to get the LED trigger name for 2379 */ 2380static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2381{ 2382#ifdef CONFIG_MAC80211_LEDS 2383 return __ieee80211_get_radio_led_name(hw); 2384#else 2385 return NULL; 2386#endif 2387} 2388 2389/** 2390 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2391 * @hw: the hardware to create the trigger for 2392 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2393 * @blink_table: the blink table -- needs to be ordered by throughput 2394 * @blink_table_len: size of the blink table 2395 * 2396 * This function returns %NULL (in case of error, or if no LED 2397 * triggers are configured) or the name of the new trigger. 2398 * This function must be called before ieee80211_register_hw(). 2399 */ 2400static inline char * 2401ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2402 const struct ieee80211_tpt_blink *blink_table, 2403 unsigned int blink_table_len) 2404{ 2405#ifdef CONFIG_MAC80211_LEDS 2406 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2407 blink_table_len); 2408#else 2409 return NULL; 2410#endif 2411} 2412 2413/** 2414 * ieee80211_unregister_hw - Unregister a hardware device 2415 * 2416 * This function instructs mac80211 to free allocated resources 2417 * and unregister netdevices from the networking subsystem. 2418 * 2419 * @hw: the hardware to unregister 2420 */ 2421void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2422 2423/** 2424 * ieee80211_free_hw - free hardware descriptor 2425 * 2426 * This function frees everything that was allocated, including the 2427 * private data for the driver. You must call ieee80211_unregister_hw() 2428 * before calling this function. 2429 * 2430 * @hw: the hardware to free 2431 */ 2432void ieee80211_free_hw(struct ieee80211_hw *hw); 2433 2434/** 2435 * ieee80211_restart_hw - restart hardware completely 2436 * 2437 * Call this function when the hardware was restarted for some reason 2438 * (hardware error, ...) and the driver is unable to restore its state 2439 * by itself. mac80211 assumes that at this point the driver/hardware 2440 * is completely uninitialised and stopped, it starts the process by 2441 * calling the ->start() operation. The driver will need to reset all 2442 * internal state that it has prior to calling this function. 2443 * 2444 * @hw: the hardware to restart 2445 */ 2446void ieee80211_restart_hw(struct ieee80211_hw *hw); 2447 2448/** ieee80211_napi_schedule - schedule NAPI poll 2449 * 2450 * Use this function to schedule NAPI polling on a device. 2451 * 2452 * @hw: the hardware to start polling 2453 */ 2454void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2455 2456/** ieee80211_napi_complete - complete NAPI polling 2457 * 2458 * Use this function to finish NAPI polling on a device. 2459 * 2460 * @hw: the hardware to stop polling 2461 */ 2462void ieee80211_napi_complete(struct ieee80211_hw *hw); 2463 2464/** 2465 * ieee80211_rx - receive frame 2466 * 2467 * Use this function to hand received frames to mac80211. The receive 2468 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2469 * paged @skb is used, the driver is recommended to put the ieee80211 2470 * header of the frame on the linear part of the @skb to avoid memory 2471 * allocation and/or memcpy by the stack. 2472 * 2473 * This function may not be called in IRQ context. Calls to this function 2474 * for a single hardware must be synchronized against each other. Calls to 2475 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2476 * mixed for a single hardware. 2477 * 2478 * In process context use instead ieee80211_rx_ni(). 2479 * 2480 * @hw: the hardware this frame came in on 2481 * @skb: the buffer to receive, owned by mac80211 after this call 2482 */ 2483void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2484 2485/** 2486 * ieee80211_rx_irqsafe - receive frame 2487 * 2488 * Like ieee80211_rx() but can be called in IRQ context 2489 * (internally defers to a tasklet.) 2490 * 2491 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2492 * be mixed for a single hardware. 2493 * 2494 * @hw: the hardware this frame came in on 2495 * @skb: the buffer to receive, owned by mac80211 after this call 2496 */ 2497void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2498 2499/** 2500 * ieee80211_rx_ni - receive frame (in process context) 2501 * 2502 * Like ieee80211_rx() but can be called in process context 2503 * (internally disables bottom halves). 2504 * 2505 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2506 * not be mixed for a single hardware. 2507 * 2508 * @hw: the hardware this frame came in on 2509 * @skb: the buffer to receive, owned by mac80211 after this call 2510 */ 2511static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2512 struct sk_buff *skb) 2513{ 2514 local_bh_disable(); 2515 ieee80211_rx(hw, skb); 2516 local_bh_enable(); 2517} 2518 2519/** 2520 * ieee80211_sta_ps_transition - PS transition for connected sta 2521 * 2522 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2523 * flag set, use this function to inform mac80211 about a connected station 2524 * entering/leaving PS mode. 2525 * 2526 * This function may not be called in IRQ context or with softirqs enabled. 2527 * 2528 * Calls to this function for a single hardware must be synchronized against 2529 * each other. 2530 * 2531 * The function returns -EINVAL when the requested PS mode is already set. 2532 * 2533 * @sta: currently connected sta 2534 * @start: start or stop PS 2535 */ 2536int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2537 2538/** 2539 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2540 * (in process context) 2541 * 2542 * Like ieee80211_sta_ps_transition() but can be called in process context 2543 * (internally disables bottom halves). Concurrent call restriction still 2544 * applies. 2545 * 2546 * @sta: currently connected sta 2547 * @start: start or stop PS 2548 */ 2549static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2550 bool start) 2551{ 2552 int ret; 2553 2554 local_bh_disable(); 2555 ret = ieee80211_sta_ps_transition(sta, start); 2556 local_bh_enable(); 2557 2558 return ret; 2559} 2560 2561/* 2562 * The TX headroom reserved by mac80211 for its own tx_status functions. 2563 * This is enough for the radiotap header. 2564 */ 2565#define IEEE80211_TX_STATUS_HEADROOM 14 2566 2567/** 2568 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 2569 * @sta: &struct ieee80211_sta pointer for the sleeping station 2570 * @tid: the TID that has buffered frames 2571 * @buffered: indicates whether or not frames are buffered for this TID 2572 * 2573 * If a driver buffers frames for a powersave station instead of passing 2574 * them back to mac80211 for retransmission, the station may still need 2575 * to be told that there are buffered frames via the TIM bit. 2576 * 2577 * This function informs mac80211 whether or not there are frames that are 2578 * buffered in the driver for a given TID; mac80211 can then use this data 2579 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 2580 * call! Beware of the locking!) 2581 * 2582 * If all frames are released to the station (due to PS-poll or uAPSD) 2583 * then the driver needs to inform mac80211 that there no longer are 2584 * frames buffered. However, when the station wakes up mac80211 assumes 2585 * that all buffered frames will be transmitted and clears this data, 2586 * drivers need to make sure they inform mac80211 about all buffered 2587 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 2588 * 2589 * Note that technically mac80211 only needs to know this per AC, not per 2590 * TID, but since driver buffering will inevitably happen per TID (since 2591 * it is related to aggregation) it is easier to make mac80211 map the 2592 * TID to the AC as required instead of keeping track in all drivers that 2593 * use this API. 2594 */ 2595void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 2596 u8 tid, bool buffered); 2597 2598/** 2599 * ieee80211_tx_status - transmit status callback 2600 * 2601 * Call this function for all transmitted frames after they have been 2602 * transmitted. It is permissible to not call this function for 2603 * multicast frames but this can affect statistics. 2604 * 2605 * This function may not be called in IRQ context. Calls to this function 2606 * for a single hardware must be synchronized against each other. Calls 2607 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 2608 * may not be mixed for a single hardware. 2609 * 2610 * @hw: the hardware the frame was transmitted by 2611 * @skb: the frame that was transmitted, owned by mac80211 after this call 2612 */ 2613void ieee80211_tx_status(struct ieee80211_hw *hw, 2614 struct sk_buff *skb); 2615 2616/** 2617 * ieee80211_tx_status_ni - transmit status callback (in process context) 2618 * 2619 * Like ieee80211_tx_status() but can be called in process context. 2620 * 2621 * Calls to this function, ieee80211_tx_status() and 2622 * ieee80211_tx_status_irqsafe() may not be mixed 2623 * for a single hardware. 2624 * 2625 * @hw: the hardware the frame was transmitted by 2626 * @skb: the frame that was transmitted, owned by mac80211 after this call 2627 */ 2628static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 2629 struct sk_buff *skb) 2630{ 2631 local_bh_disable(); 2632 ieee80211_tx_status(hw, skb); 2633 local_bh_enable(); 2634} 2635 2636/** 2637 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 2638 * 2639 * Like ieee80211_tx_status() but can be called in IRQ context 2640 * (internally defers to a tasklet.) 2641 * 2642 * Calls to this function, ieee80211_tx_status() and 2643 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 2644 * 2645 * @hw: the hardware the frame was transmitted by 2646 * @skb: the frame that was transmitted, owned by mac80211 after this call 2647 */ 2648void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2649 struct sk_buff *skb); 2650 2651/** 2652 * ieee80211_report_low_ack - report non-responding station 2653 * 2654 * When operating in AP-mode, call this function to report a non-responding 2655 * connected STA. 2656 * 2657 * @sta: the non-responding connected sta 2658 * @num_packets: number of packets sent to @sta without a response 2659 */ 2660void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 2661 2662/** 2663 * ieee80211_beacon_get_tim - beacon generation function 2664 * @hw: pointer obtained from ieee80211_alloc_hw(). 2665 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2666 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2667 * Set to 0 if invalid (in non-AP modes). 2668 * @tim_length: pointer to variable that will receive the TIM IE length, 2669 * (including the ID and length bytes!). 2670 * Set to 0 if invalid (in non-AP modes). 2671 * 2672 * If the driver implements beaconing modes, it must use this function to 2673 * obtain the beacon frame/template. 2674 * 2675 * If the beacon frames are generated by the host system (i.e., not in 2676 * hardware/firmware), the driver uses this function to get each beacon 2677 * frame from mac80211 -- it is responsible for calling this function 2678 * before the beacon is needed (e.g. based on hardware interrupt). 2679 * 2680 * If the beacon frames are generated by the device, then the driver 2681 * must use the returned beacon as the template and change the TIM IE 2682 * according to the current DTIM parameters/TIM bitmap. 2683 * 2684 * The driver is responsible for freeing the returned skb. 2685 */ 2686struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2687 struct ieee80211_vif *vif, 2688 u16 *tim_offset, u16 *tim_length); 2689 2690/** 2691 * ieee80211_beacon_get - beacon generation function 2692 * @hw: pointer obtained from ieee80211_alloc_hw(). 2693 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2694 * 2695 * See ieee80211_beacon_get_tim(). 2696 */ 2697static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2698 struct ieee80211_vif *vif) 2699{ 2700 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2701} 2702 2703/** 2704 * ieee80211_proberesp_get - retrieve a Probe Response template 2705 * @hw: pointer obtained from ieee80211_alloc_hw(). 2706 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2707 * 2708 * Creates a Probe Response template which can, for example, be uploaded to 2709 * hardware. The destination address should be set by the caller. 2710 * 2711 * Can only be called in AP mode. 2712 */ 2713struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 2714 struct ieee80211_vif *vif); 2715 2716/** 2717 * ieee80211_pspoll_get - retrieve a PS Poll template 2718 * @hw: pointer obtained from ieee80211_alloc_hw(). 2719 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2720 * 2721 * Creates a PS Poll a template which can, for example, uploaded to 2722 * hardware. The template must be updated after association so that correct 2723 * AID, BSSID and MAC address is used. 2724 * 2725 * Note: Caller (or hardware) is responsible for setting the 2726 * &IEEE80211_FCTL_PM bit. 2727 */ 2728struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2729 struct ieee80211_vif *vif); 2730 2731/** 2732 * ieee80211_nullfunc_get - retrieve a nullfunc template 2733 * @hw: pointer obtained from ieee80211_alloc_hw(). 2734 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2735 * 2736 * Creates a Nullfunc template which can, for example, uploaded to 2737 * hardware. The template must be updated after association so that correct 2738 * BSSID and address is used. 2739 * 2740 * Note: Caller (or hardware) is responsible for setting the 2741 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2742 */ 2743struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2744 struct ieee80211_vif *vif); 2745 2746/** 2747 * ieee80211_probereq_get - retrieve a Probe Request template 2748 * @hw: pointer obtained from ieee80211_alloc_hw(). 2749 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2750 * @ssid: SSID buffer 2751 * @ssid_len: length of SSID 2752 * @ie: buffer containing all IEs except SSID for the template 2753 * @ie_len: length of the IE buffer 2754 * 2755 * Creates a Probe Request template which can, for example, be uploaded to 2756 * hardware. 2757 */ 2758struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2759 struct ieee80211_vif *vif, 2760 const u8 *ssid, size_t ssid_len, 2761 const u8 *ie, size_t ie_len); 2762 2763/** 2764 * ieee80211_rts_get - RTS frame generation function 2765 * @hw: pointer obtained from ieee80211_alloc_hw(). 2766 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2767 * @frame: pointer to the frame that is going to be protected by the RTS. 2768 * @frame_len: the frame length (in octets). 2769 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2770 * @rts: The buffer where to store the RTS frame. 2771 * 2772 * If the RTS frames are generated by the host system (i.e., not in 2773 * hardware/firmware), the low-level driver uses this function to receive 2774 * the next RTS frame from the 802.11 code. The low-level is responsible 2775 * for calling this function before and RTS frame is needed. 2776 */ 2777void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2778 const void *frame, size_t frame_len, 2779 const struct ieee80211_tx_info *frame_txctl, 2780 struct ieee80211_rts *rts); 2781 2782/** 2783 * ieee80211_rts_duration - Get the duration field for an RTS frame 2784 * @hw: pointer obtained from ieee80211_alloc_hw(). 2785 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2786 * @frame_len: the length of the frame that is going to be protected by the RTS. 2787 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2788 * 2789 * If the RTS is generated in firmware, but the host system must provide 2790 * the duration field, the low-level driver uses this function to receive 2791 * the duration field value in little-endian byteorder. 2792 */ 2793__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2794 struct ieee80211_vif *vif, size_t frame_len, 2795 const struct ieee80211_tx_info *frame_txctl); 2796 2797/** 2798 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2799 * @hw: pointer obtained from ieee80211_alloc_hw(). 2800 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2801 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2802 * @frame_len: the frame length (in octets). 2803 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2804 * @cts: The buffer where to store the CTS-to-self frame. 2805 * 2806 * If the CTS-to-self frames are generated by the host system (i.e., not in 2807 * hardware/firmware), the low-level driver uses this function to receive 2808 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2809 * for calling this function before and CTS-to-self frame is needed. 2810 */ 2811void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2812 struct ieee80211_vif *vif, 2813 const void *frame, size_t frame_len, 2814 const struct ieee80211_tx_info *frame_txctl, 2815 struct ieee80211_cts *cts); 2816 2817/** 2818 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2819 * @hw: pointer obtained from ieee80211_alloc_hw(). 2820 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2821 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2822 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2823 * 2824 * If the CTS-to-self is generated in firmware, but the host system must provide 2825 * the duration field, the low-level driver uses this function to receive 2826 * the duration field value in little-endian byteorder. 2827 */ 2828__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2829 struct ieee80211_vif *vif, 2830 size_t frame_len, 2831 const struct ieee80211_tx_info *frame_txctl); 2832 2833/** 2834 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2835 * @hw: pointer obtained from ieee80211_alloc_hw(). 2836 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2837 * @frame_len: the length of the frame. 2838 * @rate: the rate at which the frame is going to be transmitted. 2839 * 2840 * Calculate the duration field of some generic frame, given its 2841 * length and transmission rate (in 100kbps). 2842 */ 2843__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2844 struct ieee80211_vif *vif, 2845 size_t frame_len, 2846 struct ieee80211_rate *rate); 2847 2848/** 2849 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2850 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2851 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2852 * 2853 * Function for accessing buffered broadcast and multicast frames. If 2854 * hardware/firmware does not implement buffering of broadcast/multicast 2855 * frames when power saving is used, 802.11 code buffers them in the host 2856 * memory. The low-level driver uses this function to fetch next buffered 2857 * frame. In most cases, this is used when generating beacon frame. This 2858 * function returns a pointer to the next buffered skb or NULL if no more 2859 * buffered frames are available. 2860 * 2861 * Note: buffered frames are returned only after DTIM beacon frame was 2862 * generated with ieee80211_beacon_get() and the low-level driver must thus 2863 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2864 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2865 * does not need to check for DTIM beacons separately and should be able to 2866 * use common code for all beacons. 2867 */ 2868struct sk_buff * 2869ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2870 2871/** 2872 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 2873 * 2874 * This function returns the TKIP phase 1 key for the given IV32. 2875 * 2876 * @keyconf: the parameter passed with the set key 2877 * @iv32: IV32 to get the P1K for 2878 * @p1k: a buffer to which the key will be written, as 5 u16 values 2879 */ 2880void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 2881 u32 iv32, u16 *p1k); 2882 2883/** 2884 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 2885 * 2886 * This function returns the TKIP phase 1 key for the IV32 taken 2887 * from the given packet. 2888 * 2889 * @keyconf: the parameter passed with the set key 2890 * @skb: the packet to take the IV32 value from that will be encrypted 2891 * with this P1K 2892 * @p1k: a buffer to which the key will be written, as 5 u16 values 2893 */ 2894static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 2895 struct sk_buff *skb, u16 *p1k) 2896{ 2897 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2898 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 2899 u32 iv32 = get_unaligned_le32(&data[4]); 2900 2901 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 2902} 2903 2904/** 2905 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 2906 * 2907 * This function returns the TKIP phase 1 key for the given IV32 2908 * and transmitter address. 2909 * 2910 * @keyconf: the parameter passed with the set key 2911 * @ta: TA that will be used with the key 2912 * @iv32: IV32 to get the P1K for 2913 * @p1k: a buffer to which the key will be written, as 5 u16 values 2914 */ 2915void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 2916 const u8 *ta, u32 iv32, u16 *p1k); 2917 2918/** 2919 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 2920 * 2921 * This function computes the TKIP RC4 key for the IV values 2922 * in the packet. 2923 * 2924 * @keyconf: the parameter passed with the set key 2925 * @skb: the packet to take the IV32/IV16 values from that will be 2926 * encrypted with this key 2927 * @p2k: a buffer to which the key will be written, 16 bytes 2928 */ 2929void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 2930 struct sk_buff *skb, u8 *p2k); 2931 2932/** 2933 * struct ieee80211_key_seq - key sequence counter 2934 * 2935 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 2936 * @ccmp: PN data, most significant byte first (big endian, 2937 * reverse order than in packet) 2938 * @aes_cmac: PN data, most significant byte first (big endian, 2939 * reverse order than in packet) 2940 */ 2941struct ieee80211_key_seq { 2942 union { 2943 struct { 2944 u32 iv32; 2945 u16 iv16; 2946 } tkip; 2947 struct { 2948 u8 pn[6]; 2949 } ccmp; 2950 struct { 2951 u8 pn[6]; 2952 } aes_cmac; 2953 }; 2954}; 2955 2956/** 2957 * ieee80211_get_key_tx_seq - get key TX sequence counter 2958 * 2959 * @keyconf: the parameter passed with the set key 2960 * @seq: buffer to receive the sequence data 2961 * 2962 * This function allows a driver to retrieve the current TX IV/PN 2963 * for the given key. It must not be called if IV generation is 2964 * offloaded to the device. 2965 * 2966 * Note that this function may only be called when no TX processing 2967 * can be done concurrently, for example when queues are stopped 2968 * and the stop has been synchronized. 2969 */ 2970void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 2971 struct ieee80211_key_seq *seq); 2972 2973/** 2974 * ieee80211_get_key_rx_seq - get key RX sequence counter 2975 * 2976 * @keyconf: the parameter passed with the set key 2977 * @tid: The TID, or -1 for the management frame value (CCMP only); 2978 * the value on TID 0 is also used for non-QoS frames. For 2979 * CMAC, only TID 0 is valid. 2980 * @seq: buffer to receive the sequence data 2981 * 2982 * This function allows a driver to retrieve the current RX IV/PNs 2983 * for the given key. It must not be called if IV checking is done 2984 * by the device and not by mac80211. 2985 * 2986 * Note that this function may only be called when no RX processing 2987 * can be done concurrently. 2988 */ 2989void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 2990 int tid, struct ieee80211_key_seq *seq); 2991 2992/** 2993 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 2994 * @vif: virtual interface the rekeying was done on 2995 * @bssid: The BSSID of the AP, for checking association 2996 * @replay_ctr: the new replay counter after GTK rekeying 2997 * @gfp: allocation flags 2998 */ 2999void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3000 const u8 *replay_ctr, gfp_t gfp); 3001 3002/** 3003 * ieee80211_wake_queue - wake specific queue 3004 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3005 * @queue: queue number (counted from zero). 3006 * 3007 * Drivers should use this function instead of netif_wake_queue. 3008 */ 3009void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3010 3011/** 3012 * ieee80211_stop_queue - stop specific queue 3013 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3014 * @queue: queue number (counted from zero). 3015 * 3016 * Drivers should use this function instead of netif_stop_queue. 3017 */ 3018void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3019 3020/** 3021 * ieee80211_queue_stopped - test status of the queue 3022 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3023 * @queue: queue number (counted from zero). 3024 * 3025 * Drivers should use this function instead of netif_stop_queue. 3026 */ 3027 3028int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3029 3030/** 3031 * ieee80211_stop_queues - stop all queues 3032 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3033 * 3034 * Drivers should use this function instead of netif_stop_queue. 3035 */ 3036void ieee80211_stop_queues(struct ieee80211_hw *hw); 3037 3038/** 3039 * ieee80211_wake_queues - wake all queues 3040 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3041 * 3042 * Drivers should use this function instead of netif_wake_queue. 3043 */ 3044void ieee80211_wake_queues(struct ieee80211_hw *hw); 3045 3046/** 3047 * ieee80211_scan_completed - completed hardware scan 3048 * 3049 * When hardware scan offload is used (i.e. the hw_scan() callback is 3050 * assigned) this function needs to be called by the driver to notify 3051 * mac80211 that the scan finished. This function can be called from 3052 * any context, including hardirq context. 3053 * 3054 * @hw: the hardware that finished the scan 3055 * @aborted: set to true if scan was aborted 3056 */ 3057void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3058 3059/** 3060 * ieee80211_sched_scan_results - got results from scheduled scan 3061 * 3062 * When a scheduled scan is running, this function needs to be called by the 3063 * driver whenever there are new scan results available. 3064 * 3065 * @hw: the hardware that is performing scheduled scans 3066 */ 3067void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3068 3069/** 3070 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3071 * 3072 * When a scheduled scan is running, this function can be called by 3073 * the driver if it needs to stop the scan to perform another task. 3074 * Usual scenarios are drivers that cannot continue the scheduled scan 3075 * while associating, for instance. 3076 * 3077 * @hw: the hardware that is performing scheduled scans 3078 */ 3079void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3080 3081/** 3082 * ieee80211_iterate_active_interfaces - iterate active interfaces 3083 * 3084 * This function iterates over the interfaces associated with a given 3085 * hardware that are currently active and calls the callback for them. 3086 * This function allows the iterator function to sleep, when the iterator 3087 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3088 * be used. 3089 * Does not iterate over a new interface during add_interface() 3090 * 3091 * @hw: the hardware struct of which the interfaces should be iterated over 3092 * @iterator: the iterator function to call 3093 * @data: first argument of the iterator function 3094 */ 3095void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3096 void (*iterator)(void *data, u8 *mac, 3097 struct ieee80211_vif *vif), 3098 void *data); 3099 3100/** 3101 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3102 * 3103 * This function iterates over the interfaces associated with a given 3104 * hardware that are currently active and calls the callback for them. 3105 * This function requires the iterator callback function to be atomic, 3106 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3107 * Does not iterate over a new interface during add_interface() 3108 * 3109 * @hw: the hardware struct of which the interfaces should be iterated over 3110 * @iterator: the iterator function to call, cannot sleep 3111 * @data: first argument of the iterator function 3112 */ 3113void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3114 void (*iterator)(void *data, 3115 u8 *mac, 3116 struct ieee80211_vif *vif), 3117 void *data); 3118 3119/** 3120 * ieee80211_queue_work - add work onto the mac80211 workqueue 3121 * 3122 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3123 * This helper ensures drivers are not queueing work when they should not be. 3124 * 3125 * @hw: the hardware struct for the interface we are adding work for 3126 * @work: the work we want to add onto the mac80211 workqueue 3127 */ 3128void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3129 3130/** 3131 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3132 * 3133 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3134 * workqueue. 3135 * 3136 * @hw: the hardware struct for the interface we are adding work for 3137 * @dwork: delayable work to queue onto the mac80211 workqueue 3138 * @delay: number of jiffies to wait before queueing 3139 */ 3140void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3141 struct delayed_work *dwork, 3142 unsigned long delay); 3143 3144/** 3145 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3146 * @sta: the station for which to start a BA session 3147 * @tid: the TID to BA on. 3148 * @timeout: session timeout value (in TUs) 3149 * 3150 * Return: success if addBA request was sent, failure otherwise 3151 * 3152 * Although mac80211/low level driver/user space application can estimate 3153 * the need to start aggregation on a certain RA/TID, the session level 3154 * will be managed by the mac80211. 3155 */ 3156int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3157 u16 timeout); 3158 3159/** 3160 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3161 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3162 * @ra: receiver address of the BA session recipient. 3163 * @tid: the TID to BA on. 3164 * 3165 * This function must be called by low level driver once it has 3166 * finished with preparations for the BA session. It can be called 3167 * from any context. 3168 */ 3169void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3170 u16 tid); 3171 3172/** 3173 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3174 * @sta: the station whose BA session to stop 3175 * @tid: the TID to stop BA. 3176 * 3177 * Return: negative error if the TID is invalid, or no aggregation active 3178 * 3179 * Although mac80211/low level driver/user space application can estimate 3180 * the need to stop aggregation on a certain RA/TID, the session level 3181 * will be managed by the mac80211. 3182 */ 3183int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3184 3185/** 3186 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3187 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3188 * @ra: receiver address of the BA session recipient. 3189 * @tid: the desired TID to BA on. 3190 * 3191 * This function must be called by low level driver once it has 3192 * finished with preparations for the BA session tear down. It 3193 * can be called from any context. 3194 */ 3195void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3196 u16 tid); 3197 3198/** 3199 * ieee80211_find_sta - find a station 3200 * 3201 * @vif: virtual interface to look for station on 3202 * @addr: station's address 3203 * 3204 * This function must be called under RCU lock and the 3205 * resulting pointer is only valid under RCU lock as well. 3206 */ 3207struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3208 const u8 *addr); 3209 3210/** 3211 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3212 * 3213 * @hw: pointer as obtained from ieee80211_alloc_hw() 3214 * @addr: remote station's address 3215 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3216 * 3217 * This function must be called under RCU lock and the 3218 * resulting pointer is only valid under RCU lock as well. 3219 * 3220 * NOTE: You may pass NULL for localaddr, but then you will just get 3221 * the first STA that matches the remote address 'addr'. 3222 * We can have multiple STA associated with multiple 3223 * logical stations (e.g. consider a station connecting to another 3224 * BSSID on the same AP hardware without disconnecting first). 3225 * In this case, the result of this method with localaddr NULL 3226 * is not reliable. 3227 * 3228 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3229 */ 3230struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3231 const u8 *addr, 3232 const u8 *localaddr); 3233 3234/** 3235 * ieee80211_sta_block_awake - block station from waking up 3236 * @hw: the hardware 3237 * @pubsta: the station 3238 * @block: whether to block or unblock 3239 * 3240 * Some devices require that all frames that are on the queues 3241 * for a specific station that went to sleep are flushed before 3242 * a poll response or frames after the station woke up can be 3243 * delivered to that it. Note that such frames must be rejected 3244 * by the driver as filtered, with the appropriate status flag. 3245 * 3246 * This function allows implementing this mode in a race-free 3247 * manner. 3248 * 3249 * To do this, a driver must keep track of the number of frames 3250 * still enqueued for a specific station. If this number is not 3251 * zero when the station goes to sleep, the driver must call 3252 * this function to force mac80211 to consider the station to 3253 * be asleep regardless of the station's actual state. Once the 3254 * number of outstanding frames reaches zero, the driver must 3255 * call this function again to unblock the station. That will 3256 * cause mac80211 to be able to send ps-poll responses, and if 3257 * the station queried in the meantime then frames will also 3258 * be sent out as a result of this. Additionally, the driver 3259 * will be notified that the station woke up some time after 3260 * it is unblocked, regardless of whether the station actually 3261 * woke up while blocked or not. 3262 */ 3263void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3264 struct ieee80211_sta *pubsta, bool block); 3265 3266/** 3267 * ieee80211_sta_eosp - notify mac80211 about end of SP 3268 * @pubsta: the station 3269 * 3270 * When a device transmits frames in a way that it can't tell 3271 * mac80211 in the TX status about the EOSP, it must clear the 3272 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3273 * This applies for PS-Poll as well as uAPSD. 3274 * 3275 * Note that there is no non-_irqsafe version right now as 3276 * it wasn't needed, but just like _tx_status() and _rx() 3277 * must not be mixed in irqsafe/non-irqsafe versions, this 3278 * function must not be mixed with those either. Use the 3279 * all irqsafe, or all non-irqsafe, don't mix! If you need 3280 * the non-irqsafe version of this, you need to add it. 3281 */ 3282void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3283 3284/** 3285 * ieee80211_iter_keys - iterate keys programmed into the device 3286 * @hw: pointer obtained from ieee80211_alloc_hw() 3287 * @vif: virtual interface to iterate, may be %NULL for all 3288 * @iter: iterator function that will be called for each key 3289 * @iter_data: custom data to pass to the iterator function 3290 * 3291 * This function can be used to iterate all the keys known to 3292 * mac80211, even those that weren't previously programmed into 3293 * the device. This is intended for use in WoWLAN if the device 3294 * needs reprogramming of the keys during suspend. Note that due 3295 * to locking reasons, it is also only safe to call this at few 3296 * spots since it must hold the RTNL and be able to sleep. 3297 * 3298 * The order in which the keys are iterated matches the order 3299 * in which they were originally installed and handed to the 3300 * set_key callback. 3301 */ 3302void ieee80211_iter_keys(struct ieee80211_hw *hw, 3303 struct ieee80211_vif *vif, 3304 void (*iter)(struct ieee80211_hw *hw, 3305 struct ieee80211_vif *vif, 3306 struct ieee80211_sta *sta, 3307 struct ieee80211_key_conf *key, 3308 void *data), 3309 void *iter_data); 3310 3311/** 3312 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3313 * @hw: pointer obtained from ieee80211_alloc_hw(). 3314 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3315 * 3316 * Creates a Probe Request template which can, for example, be uploaded to 3317 * hardware. The template is filled with bssid, ssid and supported rate 3318 * information. This function must only be called from within the 3319 * .bss_info_changed callback function and only in managed mode. The function 3320 * is only useful when the interface is associated, otherwise it will return 3321 * NULL. 3322 */ 3323struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3324 struct ieee80211_vif *vif); 3325 3326/** 3327 * ieee80211_beacon_loss - inform hardware does not receive beacons 3328 * 3329 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3330 * 3331 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3332 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3333 * hardware is not receiving beacons with this function. 3334 */ 3335void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3336 3337/** 3338 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3339 * 3340 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3341 * 3342 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3343 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3344 * needs to inform if the connection to the AP has been lost. 3345 * 3346 * This function will cause immediate change to disassociated state, 3347 * without connection recovery attempts. 3348 */ 3349void ieee80211_connection_loss(struct ieee80211_vif *vif); 3350 3351/** 3352 * ieee80211_resume_disconnect - disconnect from AP after resume 3353 * 3354 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3355 * 3356 * Instructs mac80211 to disconnect from the AP after resume. 3357 * Drivers can use this after WoWLAN if they know that the 3358 * connection cannot be kept up, for example because keys were 3359 * used while the device was asleep but the replay counters or 3360 * similar cannot be retrieved from the device during resume. 3361 * 3362 * Note that due to implementation issues, if the driver uses 3363 * the reconfiguration functionality during resume the interface 3364 * will still be added as associated first during resume and then 3365 * disconnect normally later. 3366 * 3367 * This function can only be called from the resume callback and 3368 * the driver must not be holding any of its own locks while it 3369 * calls this function, or at least not any locks it needs in the 3370 * key configuration paths (if it supports HW crypto). 3371 */ 3372void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3373 3374/** 3375 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3376 * 3377 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3378 * 3379 * Some hardware require full power save to manage simultaneous BT traffic 3380 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3381 * burst of BT traffic. The hardware gets information of BT traffic via 3382 * hardware co-existence lines, and consequentially requests mac80211 to 3383 * (temporarily) enter full psm. 3384 * This function will only temporarily disable dynamic PS, not enable PSM if 3385 * it was not already enabled. 3386 * The driver must make sure to re-enable dynamic PS using 3387 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3388 * 3389 */ 3390void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3391 3392/** 3393 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3394 * 3395 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3396 * 3397 * This function restores dynamic PS after being temporarily disabled via 3398 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3399 * be coupled with an eventual call to this function. 3400 * 3401 */ 3402void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3403 3404/** 3405 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3406 * rssi threshold triggered 3407 * 3408 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3409 * @rssi_event: the RSSI trigger event type 3410 * @gfp: context flags 3411 * 3412 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3413 * monitoring is configured with an rssi threshold, the driver will inform 3414 * whenever the rssi level reaches the threshold. 3415 */ 3416void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3417 enum nl80211_cqm_rssi_threshold_event rssi_event, 3418 gfp_t gfp); 3419 3420/** 3421 * ieee80211_get_operstate - get the operstate of the vif 3422 * 3423 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3424 * 3425 * The driver might need to know the operstate of the net_device 3426 * (specifically, whether the link is IF_OPER_UP after resume) 3427 */ 3428unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif); 3429 3430/** 3431 * ieee80211_chswitch_done - Complete channel switch process 3432 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3433 * @success: make the channel switch successful or not 3434 * 3435 * Complete the channel switch post-process: set the new operational channel 3436 * and wake up the suspended queues. 3437 */ 3438void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3439 3440/** 3441 * ieee80211_request_smps - request SM PS transition 3442 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3443 * @smps_mode: new SM PS mode 3444 * 3445 * This allows the driver to request an SM PS transition in managed 3446 * mode. This is useful when the driver has more information than 3447 * the stack about possible interference, for example by bluetooth. 3448 */ 3449void ieee80211_request_smps(struct ieee80211_vif *vif, 3450 enum ieee80211_smps_mode smps_mode); 3451 3452/** 3453 * ieee80211_key_removed - disable hw acceleration for key 3454 * @key_conf: The key hw acceleration should be disabled for 3455 * 3456 * This allows drivers to indicate that the given key has been 3457 * removed from hardware acceleration, due to a new key that 3458 * was added. Don't use this if the key can continue to be used 3459 * for TX, if the key restriction is on RX only it is permitted 3460 * to keep the key for TX only and not call this function. 3461 * 3462 * Due to locking constraints, it may only be called during 3463 * @set_key. This function must be allowed to sleep, and the 3464 * key it tries to disable may still be used until it returns. 3465 */ 3466void ieee80211_key_removed(struct ieee80211_key_conf *key_conf); 3467 3468/** 3469 * ieee80211_ready_on_channel - notification of remain-on-channel start 3470 * @hw: pointer as obtained from ieee80211_alloc_hw() 3471 */ 3472void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3473 3474/** 3475 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3476 * @hw: pointer as obtained from ieee80211_alloc_hw() 3477 */ 3478void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3479 3480/** 3481 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3482 * 3483 * in order not to harm the system performance and user experience, the device 3484 * may request not to allow any rx ba session and tear down existing rx ba 3485 * sessions based on system constraints such as periodic BT activity that needs 3486 * to limit wlan activity (eg.sco or a2dp)." 3487 * in such cases, the intention is to limit the duration of the rx ppdu and 3488 * therefore prevent the peer device to use a-mpdu aggregation. 3489 * 3490 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3491 * @ba_rx_bitmap: Bit map of open rx ba per tid 3492 * @addr: & to bssid mac address 3493 */ 3494void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 3495 const u8 *addr); 3496 3497/** 3498 * ieee80211_send_bar - send a BlockAckReq frame 3499 * 3500 * can be used to flush pending frames from the peer's aggregation reorder 3501 * buffer. 3502 * 3503 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3504 * @ra: the peer's destination address 3505 * @tid: the TID of the aggregation session 3506 * @ssn: the new starting sequence number for the receiver 3507 */ 3508void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 3509 3510/* Rate control API */ 3511 3512/** 3513 * enum rate_control_changed - flags to indicate which parameter changed 3514 * 3515 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 3516 * changed, rate control algorithm can update its internal state if needed. 3517 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed, the rate 3518 * control algorithm needs to adjust accordingly. 3519 */ 3520enum rate_control_changed { 3521 IEEE80211_RC_HT_CHANGED = BIT(0), 3522 IEEE80211_RC_SMPS_CHANGED = BIT(1), 3523}; 3524 3525/** 3526 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 3527 * 3528 * @hw: The hardware the algorithm is invoked for. 3529 * @sband: The band this frame is being transmitted on. 3530 * @bss_conf: the current BSS configuration 3531 * @skb: the skb that will be transmitted, the control information in it needs 3532 * to be filled in 3533 * @reported_rate: The rate control algorithm can fill this in to indicate 3534 * which rate should be reported to userspace as the current rate and 3535 * used for rate calculations in the mesh network. 3536 * @rts: whether RTS will be used for this frame because it is longer than the 3537 * RTS threshold 3538 * @short_preamble: whether mac80211 will request short-preamble transmission 3539 * if the selected rate supports it 3540 * @max_rate_idx: user-requested maximum (legacy) rate 3541 * (deprecated; this will be removed once drivers get updated to use 3542 * rate_idx_mask) 3543 * @rate_idx_mask: user-requested (legacy) rate mask 3544 * @rate_idx_mcs_mask: user-requested MCS rate mask 3545 * @bss: whether this frame is sent out in AP or IBSS mode 3546 */ 3547struct ieee80211_tx_rate_control { 3548 struct ieee80211_hw *hw; 3549 struct ieee80211_supported_band *sband; 3550 struct ieee80211_bss_conf *bss_conf; 3551 struct sk_buff *skb; 3552 struct ieee80211_tx_rate reported_rate; 3553 bool rts, short_preamble; 3554 u8 max_rate_idx; 3555 u32 rate_idx_mask; 3556 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 3557 bool bss; 3558}; 3559 3560struct rate_control_ops { 3561 struct module *module; 3562 const char *name; 3563 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 3564 void (*free)(void *priv); 3565 3566 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 3567 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 3568 struct ieee80211_sta *sta, void *priv_sta); 3569 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 3570 struct ieee80211_sta *sta, 3571 void *priv_sta, u32 changed, 3572 enum nl80211_channel_type oper_chan_type); 3573 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 3574 void *priv_sta); 3575 3576 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 3577 struct ieee80211_sta *sta, void *priv_sta, 3578 struct sk_buff *skb); 3579 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 3580 struct ieee80211_tx_rate_control *txrc); 3581 3582 void (*add_sta_debugfs)(void *priv, void *priv_sta, 3583 struct dentry *dir); 3584 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 3585}; 3586 3587static inline int rate_supported(struct ieee80211_sta *sta, 3588 enum ieee80211_band band, 3589 int index) 3590{ 3591 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 3592} 3593 3594/** 3595 * rate_control_send_low - helper for drivers for management/no-ack frames 3596 * 3597 * Rate control algorithms that agree to use the lowest rate to 3598 * send management frames and NO_ACK data with the respective hw 3599 * retries should use this in the beginning of their mac80211 get_rate 3600 * callback. If true is returned the rate control can simply return. 3601 * If false is returned we guarantee that sta and sta and priv_sta is 3602 * not null. 3603 * 3604 * Rate control algorithms wishing to do more intelligent selection of 3605 * rate for multicast/broadcast frames may choose to not use this. 3606 * 3607 * @sta: &struct ieee80211_sta pointer to the target destination. Note 3608 * that this may be null. 3609 * @priv_sta: private rate control structure. This may be null. 3610 * @txrc: rate control information we sholud populate for mac80211. 3611 */ 3612bool rate_control_send_low(struct ieee80211_sta *sta, 3613 void *priv_sta, 3614 struct ieee80211_tx_rate_control *txrc); 3615 3616 3617static inline s8 3618rate_lowest_index(struct ieee80211_supported_band *sband, 3619 struct ieee80211_sta *sta) 3620{ 3621 int i; 3622 3623 for (i = 0; i < sband->n_bitrates; i++) 3624 if (rate_supported(sta, sband->band, i)) 3625 return i; 3626 3627 /* warn when we cannot find a rate. */ 3628 WARN_ON_ONCE(1); 3629 3630 /* and return 0 (the lowest index) */ 3631 return 0; 3632} 3633 3634static inline 3635bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 3636 struct ieee80211_sta *sta) 3637{ 3638 unsigned int i; 3639 3640 for (i = 0; i < sband->n_bitrates; i++) 3641 if (rate_supported(sta, sband->band, i)) 3642 return true; 3643 return false; 3644} 3645 3646int ieee80211_rate_control_register(struct rate_control_ops *ops); 3647void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 3648 3649static inline bool 3650conf_is_ht20(struct ieee80211_conf *conf) 3651{ 3652 return conf->channel_type == NL80211_CHAN_HT20; 3653} 3654 3655static inline bool 3656conf_is_ht40_minus(struct ieee80211_conf *conf) 3657{ 3658 return conf->channel_type == NL80211_CHAN_HT40MINUS; 3659} 3660 3661static inline bool 3662conf_is_ht40_plus(struct ieee80211_conf *conf) 3663{ 3664 return conf->channel_type == NL80211_CHAN_HT40PLUS; 3665} 3666 3667static inline bool 3668conf_is_ht40(struct ieee80211_conf *conf) 3669{ 3670 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 3671} 3672 3673static inline bool 3674conf_is_ht(struct ieee80211_conf *conf) 3675{ 3676 return conf->channel_type != NL80211_CHAN_NO_HT; 3677} 3678 3679static inline enum nl80211_iftype 3680ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 3681{ 3682 if (p2p) { 3683 switch (type) { 3684 case NL80211_IFTYPE_STATION: 3685 return NL80211_IFTYPE_P2P_CLIENT; 3686 case NL80211_IFTYPE_AP: 3687 return NL80211_IFTYPE_P2P_GO; 3688 default: 3689 break; 3690 } 3691 } 3692 return type; 3693} 3694 3695static inline enum nl80211_iftype 3696ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 3697{ 3698 return ieee80211_iftype_p2p(vif->type, vif->p2p); 3699} 3700 3701void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 3702 int rssi_min_thold, 3703 int rssi_max_thold); 3704 3705void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 3706 3707int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb); 3708 3709int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, 3710 struct sk_buff *skb); 3711#endif /* MAC80211_H */ 3712