mac80211.h revision 4b6f1dd6a6faf4ed8d209bbd548e78b15e55aee8
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/bug.h> 17#include <linux/kernel.h> 18#include <linux/if_ether.h> 19#include <linux/skbuff.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 90struct device; 91 92/** 93 * enum ieee80211_max_queues - maximum number of queues 94 * 95 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 96 */ 97enum ieee80211_max_queues { 98 IEEE80211_MAX_QUEUES = 4, 99}; 100 101/** 102 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 103 * @IEEE80211_AC_VO: voice 104 * @IEEE80211_AC_VI: video 105 * @IEEE80211_AC_BE: best effort 106 * @IEEE80211_AC_BK: background 107 */ 108enum ieee80211_ac_numbers { 109 IEEE80211_AC_VO = 0, 110 IEEE80211_AC_VI = 1, 111 IEEE80211_AC_BE = 2, 112 IEEE80211_AC_BK = 3, 113}; 114#define IEEE80211_NUM_ACS 4 115 116/** 117 * struct ieee80211_tx_queue_params - transmit queue configuration 118 * 119 * The information provided in this structure is required for QoS 120 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 121 * 122 * @aifs: arbitration interframe space [0..255] 123 * @cw_min: minimum contention window [a value of the form 124 * 2^n-1 in the range 1..32767] 125 * @cw_max: maximum contention window [like @cw_min] 126 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 127 * @uapsd: is U-APSD mode enabled for the queue 128 */ 129struct ieee80211_tx_queue_params { 130 u16 txop; 131 u16 cw_min; 132 u16 cw_max; 133 u8 aifs; 134 bool uapsd; 135}; 136 137struct ieee80211_low_level_stats { 138 unsigned int dot11ACKFailureCount; 139 unsigned int dot11RTSFailureCount; 140 unsigned int dot11FCSErrorCount; 141 unsigned int dot11RTSSuccessCount; 142}; 143 144/** 145 * enum ieee80211_bss_change - BSS change notification flags 146 * 147 * These flags are used with the bss_info_changed() callback 148 * to indicate which BSS parameter changed. 149 * 150 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 151 * also implies a change in the AID. 152 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 153 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 154 * @BSS_CHANGED_ERP_SLOT: slot timing changed 155 * @BSS_CHANGED_HT: 802.11n parameters changed 156 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 157 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 158 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 159 * reason (IBSS and managed mode) 160 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 161 * new beacon (beaconing modes) 162 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 163 * enabled/disabled (beaconing modes) 164 * @BSS_CHANGED_CQM: Connection quality monitor config changed 165 * @BSS_CHANGED_IBSS: IBSS join status changed 166 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 167 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 168 * that it is only ever disabled for station mode. 169 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 170 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 171 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 172 */ 173enum ieee80211_bss_change { 174 BSS_CHANGED_ASSOC = 1<<0, 175 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 176 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 177 BSS_CHANGED_ERP_SLOT = 1<<3, 178 BSS_CHANGED_HT = 1<<4, 179 BSS_CHANGED_BASIC_RATES = 1<<5, 180 BSS_CHANGED_BEACON_INT = 1<<6, 181 BSS_CHANGED_BSSID = 1<<7, 182 BSS_CHANGED_BEACON = 1<<8, 183 BSS_CHANGED_BEACON_ENABLED = 1<<9, 184 BSS_CHANGED_CQM = 1<<10, 185 BSS_CHANGED_IBSS = 1<<11, 186 BSS_CHANGED_ARP_FILTER = 1<<12, 187 BSS_CHANGED_QOS = 1<<13, 188 BSS_CHANGED_IDLE = 1<<14, 189 BSS_CHANGED_SSID = 1<<15, 190 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 191 192 /* when adding here, make sure to change ieee80211_reconfig */ 193}; 194 195/* 196 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 197 * of addresses for an interface increase beyond this value, hardware ARP 198 * filtering will be disabled. 199 */ 200#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 201 202/** 203 * enum ieee80211_rssi_event - RSSI threshold event 204 * An indicator for when RSSI goes below/above a certain threshold. 205 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 206 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 207 */ 208enum ieee80211_rssi_event { 209 RSSI_EVENT_HIGH, 210 RSSI_EVENT_LOW, 211}; 212 213/** 214 * struct ieee80211_bss_conf - holds the BSS's changing parameters 215 * 216 * This structure keeps information about a BSS (and an association 217 * to that BSS) that can change during the lifetime of the BSS. 218 * 219 * @assoc: association status 220 * @ibss_joined: indicates whether this station is part of an IBSS 221 * or not 222 * @aid: association ID number, valid only when @assoc is true 223 * @use_cts_prot: use CTS protection 224 * @use_short_preamble: use 802.11b short preamble; 225 * if the hardware cannot handle this it must set the 226 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 227 * @use_short_slot: use short slot time (only relevant for ERP); 228 * if the hardware cannot handle this it must set the 229 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 230 * @dtim_period: num of beacons before the next DTIM, for beaconing, 231 * valid in station mode only while @assoc is true and if also 232 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 233 * @ps_dtim_period) 234 * @last_tsf: last beacon's/probe response's TSF timestamp (could be old 235 * as it may have been received during scanning long ago) 236 * @beacon_int: beacon interval 237 * @assoc_capability: capabilities taken from assoc resp 238 * @basic_rates: bitmap of basic rates, each bit stands for an 239 * index into the rate table configured by the driver in 240 * the current band. 241 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 242 * @bssid: The BSSID for this BSS 243 * @enable_beacon: whether beaconing should be enabled or not 244 * @channel_type: Channel type for this BSS -- the hardware might be 245 * configured for HT40+ while this BSS only uses no-HT, for 246 * example. 247 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 248 * This field is only valid when the channel type is one of the HT types. 249 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 250 * implies disabled 251 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 252 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 253 * may filter ARP queries targeted for other addresses than listed here. 254 * The driver must allow ARP queries targeted for all address listed here 255 * to pass through. An empty list implies no ARP queries need to pass. 256 * @arp_addr_cnt: Number of addresses currently on the list. 257 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 258 * filter ARP queries based on the @arp_addr_list, if disabled, the 259 * hardware must not perform any ARP filtering. Note, that the filter will 260 * be enabled also in promiscuous mode. 261 * @qos: This is a QoS-enabled BSS. 262 * @idle: This interface is idle. There's also a global idle flag in the 263 * hardware config which may be more appropriate depending on what 264 * your driver/device needs to do. 265 * @ssid: The SSID of the current vif. Only valid in AP-mode. 266 * @ssid_len: Length of SSID given in @ssid. 267 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 268 */ 269struct ieee80211_bss_conf { 270 const u8 *bssid; 271 /* association related data */ 272 bool assoc, ibss_joined; 273 u16 aid; 274 /* erp related data */ 275 bool use_cts_prot; 276 bool use_short_preamble; 277 bool use_short_slot; 278 bool enable_beacon; 279 u8 dtim_period; 280 u16 beacon_int; 281 u16 assoc_capability; 282 u64 last_tsf; 283 u32 basic_rates; 284 int mcast_rate[IEEE80211_NUM_BANDS]; 285 u16 ht_operation_mode; 286 s32 cqm_rssi_thold; 287 u32 cqm_rssi_hyst; 288 enum nl80211_channel_type channel_type; 289 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 290 u8 arp_addr_cnt; 291 bool arp_filter_enabled; 292 bool qos; 293 bool idle; 294 u8 ssid[IEEE80211_MAX_SSID_LEN]; 295 size_t ssid_len; 296 bool hidden_ssid; 297}; 298 299/** 300 * enum mac80211_tx_control_flags - flags to describe transmission information/status 301 * 302 * These flags are used with the @flags member of &ieee80211_tx_info. 303 * 304 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 305 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 306 * number to this frame, taking care of not overwriting the fragment 307 * number and increasing the sequence number only when the 308 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 309 * assign sequence numbers to QoS-data frames but cannot do so correctly 310 * for non-QoS-data and management frames because beacons need them from 311 * that counter as well and mac80211 cannot guarantee proper sequencing. 312 * If this flag is set, the driver should instruct the hardware to 313 * assign a sequence number to the frame or assign one itself. Cf. IEEE 314 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 315 * beacons and always be clear for frames without a sequence number field. 316 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 317 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 318 * station 319 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 320 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 321 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 322 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 323 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 324 * because the destination STA was in powersave mode. Note that to 325 * avoid race conditions, the filter must be set by the hardware or 326 * firmware upon receiving a frame that indicates that the station 327 * went to sleep (must be done on device to filter frames already on 328 * the queue) and may only be unset after mac80211 gives the OK for 329 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 330 * since only then is it guaranteed that no more frames are in the 331 * hardware queue. 332 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 333 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 334 * is for the whole aggregation. 335 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 336 * so consider using block ack request (BAR). 337 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 338 * set by rate control algorithms to indicate probe rate, will 339 * be cleared for fragmented frames (except on the last fragment) 340 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 341 * used to indicate that a pending frame requires TX processing before 342 * it can be sent out. 343 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 344 * used to indicate that a frame was already retried due to PS 345 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 346 * used to indicate frame should not be encrypted 347 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 348 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 349 * be sent although the station is in powersave mode. 350 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 351 * transmit function after the current frame, this can be used 352 * by drivers to kick the DMA queue only if unset or when the 353 * queue gets full. 354 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 355 * after TX status because the destination was asleep, it must not 356 * be modified again (no seqno assignment, crypto, etc.) 357 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 358 * MLME command (internal to mac80211 to figure out whether to send TX 359 * status to user space) 360 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 361 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 362 * frame and selects the maximum number of streams that it can use. 363 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 364 * the off-channel channel when a remain-on-channel offload is done 365 * in hardware -- normal packets still flow and are expected to be 366 * handled properly by the device. 367 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 368 * testing. It will be sent out with incorrect Michael MIC key to allow 369 * TKIP countermeasures to be tested. 370 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 371 * This flag is actually used for management frame especially for P2P 372 * frames not being sent at CCK rate in 2GHz band. 373 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 374 * when its status is reported the service period ends. For frames in 375 * an SP that mac80211 transmits, it is already set; for driver frames 376 * the driver may set this flag. It is also used to do the same for 377 * PS-Poll responses. 378 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 379 * This flag is used to send nullfunc frame at minimum rate when 380 * the nullfunc is used for connection monitoring purpose. 381 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 382 * would be fragmented by size (this is optional, only used for 383 * monitor injection). 384 * 385 * Note: If you have to add new flags to the enumeration, then don't 386 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 387 */ 388enum mac80211_tx_control_flags { 389 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 390 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 391 IEEE80211_TX_CTL_NO_ACK = BIT(2), 392 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 393 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 394 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 395 IEEE80211_TX_CTL_AMPDU = BIT(6), 396 IEEE80211_TX_CTL_INJECTED = BIT(7), 397 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 398 IEEE80211_TX_STAT_ACK = BIT(9), 399 IEEE80211_TX_STAT_AMPDU = BIT(10), 400 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 401 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 402 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 403 IEEE80211_TX_INTFL_RETRIED = BIT(15), 404 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 405 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 406 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 407 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 408 /* hole at 20, use later */ 409 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 410 IEEE80211_TX_CTL_LDPC = BIT(22), 411 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 412 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 413 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 414 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 415 IEEE80211_TX_STATUS_EOSP = BIT(28), 416 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 417 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 418}; 419 420#define IEEE80211_TX_CTL_STBC_SHIFT 23 421 422/* 423 * This definition is used as a mask to clear all temporary flags, which are 424 * set by the tx handlers for each transmission attempt by the mac80211 stack. 425 */ 426#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 427 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 428 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 429 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 430 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 431 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 432 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 433 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 434 435/** 436 * enum mac80211_rate_control_flags - per-rate flags set by the 437 * Rate Control algorithm. 438 * 439 * These flags are set by the Rate control algorithm for each rate during tx, 440 * in the @flags member of struct ieee80211_tx_rate. 441 * 442 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 443 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 444 * This is set if the current BSS requires ERP protection. 445 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 446 * @IEEE80211_TX_RC_MCS: HT rate. 447 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 448 * Greenfield mode. 449 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 450 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 451 * adjacent 20 MHz channels, if the current channel type is 452 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 453 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 454 */ 455enum mac80211_rate_control_flags { 456 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 457 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 458 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 459 460 /* rate index is an MCS rate number instead of an index */ 461 IEEE80211_TX_RC_MCS = BIT(3), 462 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 463 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 464 IEEE80211_TX_RC_DUP_DATA = BIT(6), 465 IEEE80211_TX_RC_SHORT_GI = BIT(7), 466}; 467 468 469/* there are 40 bytes if you don't need the rateset to be kept */ 470#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 471 472/* if you do need the rateset, then you have less space */ 473#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 474 475/* maximum number of rate stages */ 476#define IEEE80211_TX_MAX_RATES 5 477 478/** 479 * struct ieee80211_tx_rate - rate selection/status 480 * 481 * @idx: rate index to attempt to send with 482 * @flags: rate control flags (&enum mac80211_rate_control_flags) 483 * @count: number of tries in this rate before going to the next rate 484 * 485 * A value of -1 for @idx indicates an invalid rate and, if used 486 * in an array of retry rates, that no more rates should be tried. 487 * 488 * When used for transmit status reporting, the driver should 489 * always report the rate along with the flags it used. 490 * 491 * &struct ieee80211_tx_info contains an array of these structs 492 * in the control information, and it will be filled by the rate 493 * control algorithm according to what should be sent. For example, 494 * if this array contains, in the format { <idx>, <count> } the 495 * information 496 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 497 * then this means that the frame should be transmitted 498 * up to twice at rate 3, up to twice at rate 2, and up to four 499 * times at rate 1 if it doesn't get acknowledged. Say it gets 500 * acknowledged by the peer after the fifth attempt, the status 501 * information should then contain 502 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 503 * since it was transmitted twice at rate 3, twice at rate 2 504 * and once at rate 1 after which we received an acknowledgement. 505 */ 506struct ieee80211_tx_rate { 507 s8 idx; 508 u8 count; 509 u8 flags; 510} __packed; 511 512/** 513 * struct ieee80211_tx_info - skb transmit information 514 * 515 * This structure is placed in skb->cb for three uses: 516 * (1) mac80211 TX control - mac80211 tells the driver what to do 517 * (2) driver internal use (if applicable) 518 * (3) TX status information - driver tells mac80211 what happened 519 * 520 * The TX control's sta pointer is only valid during the ->tx call, 521 * it may be NULL. 522 * 523 * @flags: transmit info flags, defined above 524 * @band: the band to transmit on (use for checking for races) 525 * @reserved: reserved for future use 526 * @ack_frame_id: internal frame ID for TX status, used internally 527 * @control: union for control data 528 * @status: union for status data 529 * @driver_data: array of driver_data pointers 530 * @ampdu_ack_len: number of acked aggregated frames. 531 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 532 * @ampdu_len: number of aggregated frames. 533 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 534 * @ack_signal: signal strength of the ACK frame 535 */ 536struct ieee80211_tx_info { 537 /* common information */ 538 u32 flags; 539 u8 band; 540 541 u8 reserved; 542 543 u16 ack_frame_id; 544 545 union { 546 struct { 547 union { 548 /* rate control */ 549 struct { 550 struct ieee80211_tx_rate rates[ 551 IEEE80211_TX_MAX_RATES]; 552 s8 rts_cts_rate_idx; 553 }; 554 /* only needed before rate control */ 555 unsigned long jiffies; 556 }; 557 /* NB: vif can be NULL for injected frames */ 558 struct ieee80211_vif *vif; 559 struct ieee80211_key_conf *hw_key; 560 struct ieee80211_sta *sta; 561 } control; 562 struct { 563 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 564 u8 ampdu_ack_len; 565 int ack_signal; 566 u8 ampdu_len; 567 u8 antenna; 568 /* 14 bytes free */ 569 } status; 570 struct { 571 struct ieee80211_tx_rate driver_rates[ 572 IEEE80211_TX_MAX_RATES]; 573 void *rate_driver_data[ 574 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 575 }; 576 void *driver_data[ 577 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 578 }; 579}; 580 581/** 582 * struct ieee80211_sched_scan_ies - scheduled scan IEs 583 * 584 * This structure is used to pass the appropriate IEs to be used in scheduled 585 * scans for all bands. It contains both the IEs passed from the userspace 586 * and the ones generated by mac80211. 587 * 588 * @ie: array with the IEs for each supported band 589 * @len: array with the total length of the IEs for each band 590 */ 591struct ieee80211_sched_scan_ies { 592 u8 *ie[IEEE80211_NUM_BANDS]; 593 size_t len[IEEE80211_NUM_BANDS]; 594}; 595 596static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 597{ 598 return (struct ieee80211_tx_info *)skb->cb; 599} 600 601static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 602{ 603 return (struct ieee80211_rx_status *)skb->cb; 604} 605 606/** 607 * ieee80211_tx_info_clear_status - clear TX status 608 * 609 * @info: The &struct ieee80211_tx_info to be cleared. 610 * 611 * When the driver passes an skb back to mac80211, it must report 612 * a number of things in TX status. This function clears everything 613 * in the TX status but the rate control information (it does clear 614 * the count since you need to fill that in anyway). 615 * 616 * NOTE: You can only use this function if you do NOT use 617 * info->driver_data! Use info->rate_driver_data 618 * instead if you need only the less space that allows. 619 */ 620static inline void 621ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 622{ 623 int i; 624 625 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 626 offsetof(struct ieee80211_tx_info, control.rates)); 627 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 628 offsetof(struct ieee80211_tx_info, driver_rates)); 629 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 630 /* clear the rate counts */ 631 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 632 info->status.rates[i].count = 0; 633 634 BUILD_BUG_ON( 635 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 636 memset(&info->status.ampdu_ack_len, 0, 637 sizeof(struct ieee80211_tx_info) - 638 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 639} 640 641 642/** 643 * enum mac80211_rx_flags - receive flags 644 * 645 * These flags are used with the @flag member of &struct ieee80211_rx_status. 646 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 647 * Use together with %RX_FLAG_MMIC_STRIPPED. 648 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 649 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 650 * verification has been done by the hardware. 651 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 652 * If this flag is set, the stack cannot do any replay detection 653 * hence the driver or hardware will have to do that. 654 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 655 * the frame. 656 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 657 * the frame. 658 * @RX_FLAG_MACTIME_MPDU: The timestamp passed in the RX status (@mactime 659 * field) is valid and contains the time the first symbol of the MPDU 660 * was received. This is useful in monitor mode and for proper IBSS 661 * merging. 662 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 663 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 664 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 665 * @RX_FLAG_SHORT_GI: Short guard interval was used 666 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 667 * Valid only for data frames (mainly A-MPDU) 668 */ 669enum mac80211_rx_flags { 670 RX_FLAG_MMIC_ERROR = 1<<0, 671 RX_FLAG_DECRYPTED = 1<<1, 672 RX_FLAG_MMIC_STRIPPED = 1<<3, 673 RX_FLAG_IV_STRIPPED = 1<<4, 674 RX_FLAG_FAILED_FCS_CRC = 1<<5, 675 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 676 RX_FLAG_MACTIME_MPDU = 1<<7, 677 RX_FLAG_SHORTPRE = 1<<8, 678 RX_FLAG_HT = 1<<9, 679 RX_FLAG_40MHZ = 1<<10, 680 RX_FLAG_SHORT_GI = 1<<11, 681 RX_FLAG_NO_SIGNAL_VAL = 1<<12, 682}; 683 684/** 685 * struct ieee80211_rx_status - receive status 686 * 687 * The low-level driver should provide this information (the subset 688 * supported by hardware) to the 802.11 code with each received 689 * frame, in the skb's control buffer (cb). 690 * 691 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 692 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 693 * @band: the active band when this frame was received 694 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 695 * @signal: signal strength when receiving this frame, either in dBm, in dB or 696 * unspecified depending on the hardware capabilities flags 697 * @IEEE80211_HW_SIGNAL_* 698 * @antenna: antenna used 699 * @rate_idx: index of data rate into band's supported rates or MCS index if 700 * HT rates are use (RX_FLAG_HT) 701 * @flag: %RX_FLAG_* 702 * @rx_flags: internal RX flags for mac80211 703 */ 704struct ieee80211_rx_status { 705 u64 mactime; 706 enum ieee80211_band band; 707 int freq; 708 int signal; 709 int antenna; 710 int rate_idx; 711 int flag; 712 unsigned int rx_flags; 713}; 714 715/** 716 * enum ieee80211_conf_flags - configuration flags 717 * 718 * Flags to define PHY configuration options 719 * 720 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 721 * to determine for example whether to calculate timestamps for packets 722 * or not, do not use instead of filter flags! 723 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 724 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 725 * meaning that the hardware still wakes up for beacons, is able to 726 * transmit frames and receive the possible acknowledgment frames. 727 * Not to be confused with hardware specific wakeup/sleep states, 728 * driver is responsible for that. See the section "Powersave support" 729 * for more. 730 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 731 * the driver should be prepared to handle configuration requests but 732 * may turn the device off as much as possible. Typically, this flag will 733 * be set when an interface is set UP but not associated or scanning, but 734 * it can also be unset in that case when monitor interfaces are active. 735 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 736 * operating channel. 737 */ 738enum ieee80211_conf_flags { 739 IEEE80211_CONF_MONITOR = (1<<0), 740 IEEE80211_CONF_PS = (1<<1), 741 IEEE80211_CONF_IDLE = (1<<2), 742 IEEE80211_CONF_OFFCHANNEL = (1<<3), 743}; 744 745 746/** 747 * enum ieee80211_conf_changed - denotes which configuration changed 748 * 749 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 750 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 751 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 752 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 753 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 754 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 755 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 756 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 757 */ 758enum ieee80211_conf_changed { 759 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 760 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 761 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 762 IEEE80211_CONF_CHANGE_PS = BIT(4), 763 IEEE80211_CONF_CHANGE_POWER = BIT(5), 764 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 765 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 766 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 767}; 768 769/** 770 * enum ieee80211_smps_mode - spatial multiplexing power save mode 771 * 772 * @IEEE80211_SMPS_AUTOMATIC: automatic 773 * @IEEE80211_SMPS_OFF: off 774 * @IEEE80211_SMPS_STATIC: static 775 * @IEEE80211_SMPS_DYNAMIC: dynamic 776 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 777 */ 778enum ieee80211_smps_mode { 779 IEEE80211_SMPS_AUTOMATIC, 780 IEEE80211_SMPS_OFF, 781 IEEE80211_SMPS_STATIC, 782 IEEE80211_SMPS_DYNAMIC, 783 784 /* keep last */ 785 IEEE80211_SMPS_NUM_MODES, 786}; 787 788/** 789 * struct ieee80211_conf - configuration of the device 790 * 791 * This struct indicates how the driver shall configure the hardware. 792 * 793 * @flags: configuration flags defined above 794 * 795 * @listen_interval: listen interval in units of beacon interval 796 * @max_sleep_period: the maximum number of beacon intervals to sleep for 797 * before checking the beacon for a TIM bit (managed mode only); this 798 * value will be only achievable between DTIM frames, the hardware 799 * needs to check for the multicast traffic bit in DTIM beacons. 800 * This variable is valid only when the CONF_PS flag is set. 801 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 802 * in power saving. Power saving will not be enabled until a beacon 803 * has been received and the DTIM period is known. 804 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 805 * powersave documentation below. This variable is valid only when 806 * the CONF_PS flag is set. 807 * 808 * @power_level: requested transmit power (in dBm) 809 * 810 * @channel: the channel to tune to 811 * @channel_type: the channel (HT) type 812 * 813 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 814 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 815 * but actually means the number of transmissions not the number of retries 816 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 817 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 818 * number of transmissions not the number of retries 819 * 820 * @smps_mode: spatial multiplexing powersave mode; note that 821 * %IEEE80211_SMPS_STATIC is used when the device is not 822 * configured for an HT channel 823 */ 824struct ieee80211_conf { 825 u32 flags; 826 int power_level, dynamic_ps_timeout; 827 int max_sleep_period; 828 829 u16 listen_interval; 830 u8 ps_dtim_period; 831 832 u8 long_frame_max_tx_count, short_frame_max_tx_count; 833 834 struct ieee80211_channel *channel; 835 enum nl80211_channel_type channel_type; 836 enum ieee80211_smps_mode smps_mode; 837}; 838 839/** 840 * struct ieee80211_channel_switch - holds the channel switch data 841 * 842 * The information provided in this structure is required for channel switch 843 * operation. 844 * 845 * @timestamp: value in microseconds of the 64-bit Time Synchronization 846 * Function (TSF) timer when the frame containing the channel switch 847 * announcement was received. This is simply the rx.mactime parameter 848 * the driver passed into mac80211. 849 * @block_tx: Indicates whether transmission must be blocked before the 850 * scheduled channel switch, as indicated by the AP. 851 * @channel: the new channel to switch to 852 * @count: the number of TBTT's until the channel switch event 853 */ 854struct ieee80211_channel_switch { 855 u64 timestamp; 856 bool block_tx; 857 struct ieee80211_channel *channel; 858 u8 count; 859}; 860 861/** 862 * enum ieee80211_vif_flags - virtual interface flags 863 * 864 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 865 * on this virtual interface to avoid unnecessary CPU wakeups 866 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 867 * monitoring on this virtual interface -- i.e. it can monitor 868 * connection quality related parameters, such as the RSSI level and 869 * provide notifications if configured trigger levels are reached. 870 */ 871enum ieee80211_vif_flags { 872 IEEE80211_VIF_BEACON_FILTER = BIT(0), 873 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 874}; 875 876/** 877 * struct ieee80211_vif - per-interface data 878 * 879 * Data in this structure is continually present for driver 880 * use during the life of a virtual interface. 881 * 882 * @type: type of this virtual interface 883 * @bss_conf: BSS configuration for this interface, either our own 884 * or the BSS we're associated to 885 * @addr: address of this interface 886 * @p2p: indicates whether this AP or STA interface is a p2p 887 * interface, i.e. a GO or p2p-sta respectively 888 * @driver_flags: flags/capabilities the driver has for this interface, 889 * these need to be set (or cleared) when the interface is added 890 * or, if supported by the driver, the interface type is changed 891 * at runtime, mac80211 will never touch this field 892 * @drv_priv: data area for driver use, will always be aligned to 893 * sizeof(void *). 894 */ 895struct ieee80211_vif { 896 enum nl80211_iftype type; 897 struct ieee80211_bss_conf bss_conf; 898 u8 addr[ETH_ALEN]; 899 bool p2p; 900 u32 driver_flags; 901 /* must be last */ 902 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 903}; 904 905static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 906{ 907#ifdef CONFIG_MAC80211_MESH 908 return vif->type == NL80211_IFTYPE_MESH_POINT; 909#endif 910 return false; 911} 912 913/** 914 * enum ieee80211_key_flags - key flags 915 * 916 * These flags are used for communication about keys between the driver 917 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 918 * 919 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 920 * that the STA this key will be used with could be using QoS. 921 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 922 * driver to indicate that it requires IV generation for this 923 * particular key. 924 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 925 * the driver for a TKIP key if it requires Michael MIC 926 * generation in software. 927 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 928 * that the key is pairwise rather then a shared key. 929 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 930 * CCMP key if it requires CCMP encryption of management frames (MFP) to 931 * be done in software. 932 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 933 * for a CCMP key if space should be prepared for the IV, but the IV 934 * itself should not be generated. Do not set together with 935 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 936 */ 937enum ieee80211_key_flags { 938 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 939 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 940 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 941 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 942 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 943 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 944}; 945 946/** 947 * struct ieee80211_key_conf - key information 948 * 949 * This key information is given by mac80211 to the driver by 950 * the set_key() callback in &struct ieee80211_ops. 951 * 952 * @hw_key_idx: To be set by the driver, this is the key index the driver 953 * wants to be given when a frame is transmitted and needs to be 954 * encrypted in hardware. 955 * @cipher: The key's cipher suite selector. 956 * @flags: key flags, see &enum ieee80211_key_flags. 957 * @keyidx: the key index (0-3) 958 * @keylen: key material length 959 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 960 * data block: 961 * - Temporal Encryption Key (128 bits) 962 * - Temporal Authenticator Tx MIC Key (64 bits) 963 * - Temporal Authenticator Rx MIC Key (64 bits) 964 * @icv_len: The ICV length for this key type 965 * @iv_len: The IV length for this key type 966 */ 967struct ieee80211_key_conf { 968 u32 cipher; 969 u8 icv_len; 970 u8 iv_len; 971 u8 hw_key_idx; 972 u8 flags; 973 s8 keyidx; 974 u8 keylen; 975 u8 key[0]; 976}; 977 978/** 979 * enum set_key_cmd - key command 980 * 981 * Used with the set_key() callback in &struct ieee80211_ops, this 982 * indicates whether a key is being removed or added. 983 * 984 * @SET_KEY: a key is set 985 * @DISABLE_KEY: a key must be disabled 986 */ 987enum set_key_cmd { 988 SET_KEY, DISABLE_KEY, 989}; 990 991/** 992 * enum ieee80211_sta_state - station state 993 * 994 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 995 * this is a special state for add/remove transitions 996 * @IEEE80211_STA_NONE: station exists without special state 997 * @IEEE80211_STA_AUTH: station is authenticated 998 * @IEEE80211_STA_ASSOC: station is associated 999 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1000 */ 1001enum ieee80211_sta_state { 1002 /* NOTE: These need to be ordered correctly! */ 1003 IEEE80211_STA_NOTEXIST, 1004 IEEE80211_STA_NONE, 1005 IEEE80211_STA_AUTH, 1006 IEEE80211_STA_ASSOC, 1007 IEEE80211_STA_AUTHORIZED, 1008}; 1009 1010/** 1011 * struct ieee80211_sta - station table entry 1012 * 1013 * A station table entry represents a station we are possibly 1014 * communicating with. Since stations are RCU-managed in 1015 * mac80211, any ieee80211_sta pointer you get access to must 1016 * either be protected by rcu_read_lock() explicitly or implicitly, 1017 * or you must take good care to not use such a pointer after a 1018 * call to your sta_remove callback that removed it. 1019 * 1020 * @addr: MAC address 1021 * @aid: AID we assigned to the station if we're an AP 1022 * @supp_rates: Bitmap of supported rates (per band) 1023 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1024 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1025 * @drv_priv: data area for driver use, will always be aligned to 1026 * sizeof(void *), size is determined in hw information. 1027 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1028 * if wme is supported. 1029 * @max_sp: max Service Period. Only valid if wme is supported. 1030 */ 1031struct ieee80211_sta { 1032 u32 supp_rates[IEEE80211_NUM_BANDS]; 1033 u8 addr[ETH_ALEN]; 1034 u16 aid; 1035 struct ieee80211_sta_ht_cap ht_cap; 1036 bool wme; 1037 u8 uapsd_queues; 1038 u8 max_sp; 1039 1040 /* must be last */ 1041 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 1042}; 1043 1044/** 1045 * enum sta_notify_cmd - sta notify command 1046 * 1047 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1048 * indicates if an associated station made a power state transition. 1049 * 1050 * @STA_NOTIFY_SLEEP: a station is now sleeping 1051 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1052 */ 1053enum sta_notify_cmd { 1054 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1055}; 1056 1057/** 1058 * enum ieee80211_hw_flags - hardware flags 1059 * 1060 * These flags are used to indicate hardware capabilities to 1061 * the stack. Generally, flags here should have their meaning 1062 * done in a way that the simplest hardware doesn't need setting 1063 * any particular flags. There are some exceptions to this rule, 1064 * however, so you are advised to review these flags carefully. 1065 * 1066 * @IEEE80211_HW_HAS_RATE_CONTROL: 1067 * The hardware or firmware includes rate control, and cannot be 1068 * controlled by the stack. As such, no rate control algorithm 1069 * should be instantiated, and the TX rate reported to userspace 1070 * will be taken from the TX status instead of the rate control 1071 * algorithm. 1072 * Note that this requires that the driver implement a number of 1073 * callbacks so it has the correct information, it needs to have 1074 * the @set_rts_threshold callback and must look at the BSS config 1075 * @use_cts_prot for G/N protection, @use_short_slot for slot 1076 * timing in 2.4 GHz and @use_short_preamble for preambles for 1077 * CCK frames. 1078 * 1079 * @IEEE80211_HW_RX_INCLUDES_FCS: 1080 * Indicates that received frames passed to the stack include 1081 * the FCS at the end. 1082 * 1083 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1084 * Some wireless LAN chipsets buffer broadcast/multicast frames 1085 * for power saving stations in the hardware/firmware and others 1086 * rely on the host system for such buffering. This option is used 1087 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1088 * multicast frames when there are power saving stations so that 1089 * the driver can fetch them with ieee80211_get_buffered_bc(). 1090 * 1091 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1092 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1093 * 1094 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1095 * Hardware is not capable of receiving frames with short preamble on 1096 * the 2.4 GHz band. 1097 * 1098 * @IEEE80211_HW_SIGNAL_UNSPEC: 1099 * Hardware can provide signal values but we don't know its units. We 1100 * expect values between 0 and @max_signal. 1101 * If possible please provide dB or dBm instead. 1102 * 1103 * @IEEE80211_HW_SIGNAL_DBM: 1104 * Hardware gives signal values in dBm, decibel difference from 1105 * one milliwatt. This is the preferred method since it is standardized 1106 * between different devices. @max_signal does not need to be set. 1107 * 1108 * @IEEE80211_HW_SPECTRUM_MGMT: 1109 * Hardware supports spectrum management defined in 802.11h 1110 * Measurement, Channel Switch, Quieting, TPC 1111 * 1112 * @IEEE80211_HW_AMPDU_AGGREGATION: 1113 * Hardware supports 11n A-MPDU aggregation. 1114 * 1115 * @IEEE80211_HW_SUPPORTS_PS: 1116 * Hardware has power save support (i.e. can go to sleep). 1117 * 1118 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1119 * Hardware requires nullfunc frame handling in stack, implies 1120 * stack support for dynamic PS. 1121 * 1122 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1123 * Hardware has support for dynamic PS. 1124 * 1125 * @IEEE80211_HW_MFP_CAPABLE: 1126 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1127 * 1128 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1129 * Hardware supports static spatial multiplexing powersave, 1130 * ie. can turn off all but one chain even on HT connections 1131 * that should be using more chains. 1132 * 1133 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1134 * Hardware supports dynamic spatial multiplexing powersave, 1135 * ie. can turn off all but one chain and then wake the rest 1136 * up as required after, for example, rts/cts handshake. 1137 * 1138 * @IEEE80211_HW_SUPPORTS_UAPSD: 1139 * Hardware supports Unscheduled Automatic Power Save Delivery 1140 * (U-APSD) in managed mode. The mode is configured with 1141 * conf_tx() operation. 1142 * 1143 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1144 * Hardware can provide ack status reports of Tx frames to 1145 * the stack. 1146 * 1147 * @IEEE80211_HW_CONNECTION_MONITOR: 1148 * The hardware performs its own connection monitoring, including 1149 * periodic keep-alives to the AP and probing the AP on beacon loss. 1150 * When this flag is set, signaling beacon-loss will cause an immediate 1151 * change to disassociated state. 1152 * 1153 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1154 * This device needs to know the DTIM period for the BSS before 1155 * associating. 1156 * 1157 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1158 * per-station GTKs as used by IBSS RSN or during fast transition. If 1159 * the device doesn't support per-station GTKs, but can be asked not 1160 * to decrypt group addressed frames, then IBSS RSN support is still 1161 * possible but software crypto will be used. Advertise the wiphy flag 1162 * only in that case. 1163 * 1164 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1165 * autonomously manages the PS status of connected stations. When 1166 * this flag is set mac80211 will not trigger PS mode for connected 1167 * stations based on the PM bit of incoming frames. 1168 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1169 * the PS mode of connected stations. 1170 * 1171 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1172 * setup strictly in HW. mac80211 should not attempt to do this in 1173 * software. 1174 * 1175 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1176 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1177 * the scan). 1178 * 1179 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1180 * a virtual monitor interface when monitor interfaces are the only 1181 * active interfaces. 1182 */ 1183enum ieee80211_hw_flags { 1184 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1185 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1186 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1187 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1188 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1189 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1190 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1191 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1192 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1193 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1194 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1195 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1196 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1197 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1198 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1199 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1200 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1201 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1202 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1203 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1204 /* reuse bit 20 */ 1205 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1206 IEEE80211_HW_AP_LINK_PS = 1<<22, 1207 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1208 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1209}; 1210 1211/** 1212 * struct ieee80211_hw - hardware information and state 1213 * 1214 * This structure contains the configuration and hardware 1215 * information for an 802.11 PHY. 1216 * 1217 * @wiphy: This points to the &struct wiphy allocated for this 1218 * 802.11 PHY. You must fill in the @perm_addr and @dev 1219 * members of this structure using SET_IEEE80211_DEV() 1220 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1221 * bands (with channels, bitrates) are registered here. 1222 * 1223 * @conf: &struct ieee80211_conf, device configuration, don't use. 1224 * 1225 * @priv: pointer to private area that was allocated for driver use 1226 * along with this structure. 1227 * 1228 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1229 * 1230 * @extra_tx_headroom: headroom to reserve in each transmit skb 1231 * for use by the driver (e.g. for transmit headers.) 1232 * 1233 * @channel_change_time: time (in microseconds) it takes to change channels. 1234 * 1235 * @max_signal: Maximum value for signal (rssi) in RX information, used 1236 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1237 * 1238 * @max_listen_interval: max listen interval in units of beacon interval 1239 * that HW supports 1240 * 1241 * @queues: number of available hardware transmit queues for 1242 * data packets. WMM/QoS requires at least four, these 1243 * queues need to have configurable access parameters. 1244 * 1245 * @rate_control_algorithm: rate control algorithm for this hardware. 1246 * If unset (NULL), the default algorithm will be used. Must be 1247 * set before calling ieee80211_register_hw(). 1248 * 1249 * @vif_data_size: size (in bytes) of the drv_priv data area 1250 * within &struct ieee80211_vif. 1251 * @sta_data_size: size (in bytes) of the drv_priv data area 1252 * within &struct ieee80211_sta. 1253 * 1254 * @max_rates: maximum number of alternate rate retry stages the hw 1255 * can handle. 1256 * @max_report_rates: maximum number of alternate rate retry stages 1257 * the hw can report back. 1258 * @max_rate_tries: maximum number of tries for each stage 1259 * 1260 * @napi_weight: weight used for NAPI polling. You must specify an 1261 * appropriate value here if a napi_poll operation is provided 1262 * by your driver. 1263 * 1264 * @max_rx_aggregation_subframes: maximum buffer size (number of 1265 * sub-frames) to be used for A-MPDU block ack receiver 1266 * aggregation. 1267 * This is only relevant if the device has restrictions on the 1268 * number of subframes, if it relies on mac80211 to do reordering 1269 * it shouldn't be set. 1270 * 1271 * @max_tx_aggregation_subframes: maximum number of subframes in an 1272 * aggregate an HT driver will transmit, used by the peer as a 1273 * hint to size its reorder buffer. 1274 */ 1275struct ieee80211_hw { 1276 struct ieee80211_conf conf; 1277 struct wiphy *wiphy; 1278 const char *rate_control_algorithm; 1279 void *priv; 1280 u32 flags; 1281 unsigned int extra_tx_headroom; 1282 int channel_change_time; 1283 int vif_data_size; 1284 int sta_data_size; 1285 int napi_weight; 1286 u16 queues; 1287 u16 max_listen_interval; 1288 s8 max_signal; 1289 u8 max_rates; 1290 u8 max_report_rates; 1291 u8 max_rate_tries; 1292 u8 max_rx_aggregation_subframes; 1293 u8 max_tx_aggregation_subframes; 1294}; 1295 1296/** 1297 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1298 * 1299 * @wiphy: the &struct wiphy which we want to query 1300 * 1301 * mac80211 drivers can use this to get to their respective 1302 * &struct ieee80211_hw. Drivers wishing to get to their own private 1303 * structure can then access it via hw->priv. Note that mac802111 drivers should 1304 * not use wiphy_priv() to try to get their private driver structure as this 1305 * is already used internally by mac80211. 1306 */ 1307struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1308 1309/** 1310 * SET_IEEE80211_DEV - set device for 802.11 hardware 1311 * 1312 * @hw: the &struct ieee80211_hw to set the device for 1313 * @dev: the &struct device of this 802.11 device 1314 */ 1315static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1316{ 1317 set_wiphy_dev(hw->wiphy, dev); 1318} 1319 1320/** 1321 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1322 * 1323 * @hw: the &struct ieee80211_hw to set the MAC address for 1324 * @addr: the address to set 1325 */ 1326static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1327{ 1328 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1329} 1330 1331static inline struct ieee80211_rate * 1332ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1333 const struct ieee80211_tx_info *c) 1334{ 1335 if (WARN_ON(c->control.rates[0].idx < 0)) 1336 return NULL; 1337 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1338} 1339 1340static inline struct ieee80211_rate * 1341ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1342 const struct ieee80211_tx_info *c) 1343{ 1344 if (c->control.rts_cts_rate_idx < 0) 1345 return NULL; 1346 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1347} 1348 1349static inline struct ieee80211_rate * 1350ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1351 const struct ieee80211_tx_info *c, int idx) 1352{ 1353 if (c->control.rates[idx + 1].idx < 0) 1354 return NULL; 1355 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1356} 1357 1358/** 1359 * ieee80211_free_txskb - free TX skb 1360 * @hw: the hardware 1361 * @skb: the skb 1362 * 1363 * Free a transmit skb. Use this funtion when some failure 1364 * to transmit happened and thus status cannot be reported. 1365 */ 1366void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1367 1368/** 1369 * DOC: Hardware crypto acceleration 1370 * 1371 * mac80211 is capable of taking advantage of many hardware 1372 * acceleration designs for encryption and decryption operations. 1373 * 1374 * The set_key() callback in the &struct ieee80211_ops for a given 1375 * device is called to enable hardware acceleration of encryption and 1376 * decryption. The callback takes a @sta parameter that will be NULL 1377 * for default keys or keys used for transmission only, or point to 1378 * the station information for the peer for individual keys. 1379 * Multiple transmission keys with the same key index may be used when 1380 * VLANs are configured for an access point. 1381 * 1382 * When transmitting, the TX control data will use the @hw_key_idx 1383 * selected by the driver by modifying the &struct ieee80211_key_conf 1384 * pointed to by the @key parameter to the set_key() function. 1385 * 1386 * The set_key() call for the %SET_KEY command should return 0 if 1387 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1388 * added; if you return 0 then hw_key_idx must be assigned to the 1389 * hardware key index, you are free to use the full u8 range. 1390 * 1391 * When the cmd is %DISABLE_KEY then it must succeed. 1392 * 1393 * Note that it is permissible to not decrypt a frame even if a key 1394 * for it has been uploaded to hardware, the stack will not make any 1395 * decision based on whether a key has been uploaded or not but rather 1396 * based on the receive flags. 1397 * 1398 * The &struct ieee80211_key_conf structure pointed to by the @key 1399 * parameter is guaranteed to be valid until another call to set_key() 1400 * removes it, but it can only be used as a cookie to differentiate 1401 * keys. 1402 * 1403 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1404 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1405 * handler. 1406 * The update_tkip_key() call updates the driver with the new phase 1 key. 1407 * This happens every time the iv16 wraps around (every 65536 packets). The 1408 * set_key() call will happen only once for each key (unless the AP did 1409 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1410 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1411 * handler is software decryption with wrap around of iv16. 1412 */ 1413 1414/** 1415 * DOC: Powersave support 1416 * 1417 * mac80211 has support for various powersave implementations. 1418 * 1419 * First, it can support hardware that handles all powersaving by itself, 1420 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1421 * flag. In that case, it will be told about the desired powersave mode 1422 * with the %IEEE80211_CONF_PS flag depending on the association status. 1423 * The hardware must take care of sending nullfunc frames when necessary, 1424 * i.e. when entering and leaving powersave mode. The hardware is required 1425 * to look at the AID in beacons and signal to the AP that it woke up when 1426 * it finds traffic directed to it. 1427 * 1428 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1429 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1430 * with hardware wakeup and sleep states. Driver is responsible for waking 1431 * up the hardware before issuing commands to the hardware and putting it 1432 * back to sleep at appropriate times. 1433 * 1434 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1435 * buffered multicast/broadcast frames after the beacon. Also it must be 1436 * possible to send frames and receive the acknowledment frame. 1437 * 1438 * Other hardware designs cannot send nullfunc frames by themselves and also 1439 * need software support for parsing the TIM bitmap. This is also supported 1440 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1441 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1442 * required to pass up beacons. The hardware is still required to handle 1443 * waking up for multicast traffic; if it cannot the driver must handle that 1444 * as best as it can, mac80211 is too slow to do that. 1445 * 1446 * Dynamic powersave is an extension to normal powersave in which the 1447 * hardware stays awake for a user-specified period of time after sending a 1448 * frame so that reply frames need not be buffered and therefore delayed to 1449 * the next wakeup. It's compromise of getting good enough latency when 1450 * there's data traffic and still saving significantly power in idle 1451 * periods. 1452 * 1453 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1454 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1455 * flag and mac80211 will handle everything automatically. Additionally, 1456 * hardware having support for the dynamic PS feature may set the 1457 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1458 * dynamic PS mode itself. The driver needs to look at the 1459 * @dynamic_ps_timeout hardware configuration value and use it that value 1460 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1461 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1462 * enabled whenever user has enabled powersave. 1463 * 1464 * Some hardware need to toggle a single shared antenna between WLAN and 1465 * Bluetooth to facilitate co-existence. These types of hardware set 1466 * limitations on the use of host controlled dynamic powersave whenever there 1467 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1468 * driver may request temporarily going into full power save, in order to 1469 * enable toggling the antenna between BT and WLAN. If the driver requests 1470 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1471 * temporarily set to zero until the driver re-enables dynamic powersave. 1472 * 1473 * Driver informs U-APSD client support by enabling 1474 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1475 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1476 * Nullfunc frames and stay awake until the service period has ended. To 1477 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1478 * from that AC are transmitted with powersave enabled. 1479 * 1480 * Note: U-APSD client mode is not yet supported with 1481 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1482 */ 1483 1484/** 1485 * DOC: Beacon filter support 1486 * 1487 * Some hardware have beacon filter support to reduce host cpu wakeups 1488 * which will reduce system power consumption. It usually works so that 1489 * the firmware creates a checksum of the beacon but omits all constantly 1490 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1491 * beacon is forwarded to the host, otherwise it will be just dropped. That 1492 * way the host will only receive beacons where some relevant information 1493 * (for example ERP protection or WMM settings) have changed. 1494 * 1495 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1496 * interface capability. The driver needs to enable beacon filter support 1497 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1498 * power save is enabled, the stack will not check for beacon loss and the 1499 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1500 * 1501 * The time (or number of beacons missed) until the firmware notifies the 1502 * driver of a beacon loss event (which in turn causes the driver to call 1503 * ieee80211_beacon_loss()) should be configurable and will be controlled 1504 * by mac80211 and the roaming algorithm in the future. 1505 * 1506 * Since there may be constantly changing information elements that nothing 1507 * in the software stack cares about, we will, in the future, have mac80211 1508 * tell the driver which information elements are interesting in the sense 1509 * that we want to see changes in them. This will include 1510 * - a list of information element IDs 1511 * - a list of OUIs for the vendor information element 1512 * 1513 * Ideally, the hardware would filter out any beacons without changes in the 1514 * requested elements, but if it cannot support that it may, at the expense 1515 * of some efficiency, filter out only a subset. For example, if the device 1516 * doesn't support checking for OUIs it should pass up all changes in all 1517 * vendor information elements. 1518 * 1519 * Note that change, for the sake of simplification, also includes information 1520 * elements appearing or disappearing from the beacon. 1521 * 1522 * Some hardware supports an "ignore list" instead, just make sure nothing 1523 * that was requested is on the ignore list, and include commonly changing 1524 * information element IDs in the ignore list, for example 11 (BSS load) and 1525 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1526 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1527 * it could also include some currently unused IDs. 1528 * 1529 * 1530 * In addition to these capabilities, hardware should support notifying the 1531 * host of changes in the beacon RSSI. This is relevant to implement roaming 1532 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1533 * the received data packets). This can consist in notifying the host when 1534 * the RSSI changes significantly or when it drops below or rises above 1535 * configurable thresholds. In the future these thresholds will also be 1536 * configured by mac80211 (which gets them from userspace) to implement 1537 * them as the roaming algorithm requires. 1538 * 1539 * If the hardware cannot implement this, the driver should ask it to 1540 * periodically pass beacon frames to the host so that software can do the 1541 * signal strength threshold checking. 1542 */ 1543 1544/** 1545 * DOC: Spatial multiplexing power save 1546 * 1547 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1548 * power in an 802.11n implementation. For details on the mechanism 1549 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1550 * "11.2.3 SM power save". 1551 * 1552 * The mac80211 implementation is capable of sending action frames 1553 * to update the AP about the station's SMPS mode, and will instruct 1554 * the driver to enter the specific mode. It will also announce the 1555 * requested SMPS mode during the association handshake. Hardware 1556 * support for this feature is required, and can be indicated by 1557 * hardware flags. 1558 * 1559 * The default mode will be "automatic", which nl80211/cfg80211 1560 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1561 * turned off otherwise. 1562 * 1563 * To support this feature, the driver must set the appropriate 1564 * hardware support flags, and handle the SMPS flag to the config() 1565 * operation. It will then with this mechanism be instructed to 1566 * enter the requested SMPS mode while associated to an HT AP. 1567 */ 1568 1569/** 1570 * DOC: Frame filtering 1571 * 1572 * mac80211 requires to see many management frames for proper 1573 * operation, and users may want to see many more frames when 1574 * in monitor mode. However, for best CPU usage and power consumption, 1575 * having as few frames as possible percolate through the stack is 1576 * desirable. Hence, the hardware should filter as much as possible. 1577 * 1578 * To achieve this, mac80211 uses filter flags (see below) to tell 1579 * the driver's configure_filter() function which frames should be 1580 * passed to mac80211 and which should be filtered out. 1581 * 1582 * Before configure_filter() is invoked, the prepare_multicast() 1583 * callback is invoked with the parameters @mc_count and @mc_list 1584 * for the combined multicast address list of all virtual interfaces. 1585 * It's use is optional, and it returns a u64 that is passed to 1586 * configure_filter(). Additionally, configure_filter() has the 1587 * arguments @changed_flags telling which flags were changed and 1588 * @total_flags with the new flag states. 1589 * 1590 * If your device has no multicast address filters your driver will 1591 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1592 * parameter to see whether multicast frames should be accepted 1593 * or dropped. 1594 * 1595 * All unsupported flags in @total_flags must be cleared. 1596 * Hardware does not support a flag if it is incapable of _passing_ 1597 * the frame to the stack. Otherwise the driver must ignore 1598 * the flag, but not clear it. 1599 * You must _only_ clear the flag (announce no support for the 1600 * flag to mac80211) if you are not able to pass the packet type 1601 * to the stack (so the hardware always filters it). 1602 * So for example, you should clear @FIF_CONTROL, if your hardware 1603 * always filters control frames. If your hardware always passes 1604 * control frames to the kernel and is incapable of filtering them, 1605 * you do _not_ clear the @FIF_CONTROL flag. 1606 * This rule applies to all other FIF flags as well. 1607 */ 1608 1609/** 1610 * DOC: AP support for powersaving clients 1611 * 1612 * In order to implement AP and P2P GO modes, mac80211 has support for 1613 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1614 * There currently is no support for sAPSD. 1615 * 1616 * There is one assumption that mac80211 makes, namely that a client 1617 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1618 * Both are supported, and both can be used by the same client, but 1619 * they can't be used concurrently by the same client. This simplifies 1620 * the driver code. 1621 * 1622 * The first thing to keep in mind is that there is a flag for complete 1623 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1624 * mac80211 expects the driver to handle most of the state machine for 1625 * powersaving clients and will ignore the PM bit in incoming frames. 1626 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1627 * stations' powersave transitions. In this mode, mac80211 also doesn't 1628 * handle PS-Poll/uAPSD. 1629 * 1630 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1631 * PM bit in incoming frames for client powersave transitions. When a 1632 * station goes to sleep, we will stop transmitting to it. There is, 1633 * however, a race condition: a station might go to sleep while there is 1634 * data buffered on hardware queues. If the device has support for this 1635 * it will reject frames, and the driver should give the frames back to 1636 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1637 * cause mac80211 to retry the frame when the station wakes up. The 1638 * driver is also notified of powersave transitions by calling its 1639 * @sta_notify callback. 1640 * 1641 * When the station is asleep, it has three choices: it can wake up, 1642 * it can PS-Poll, or it can possibly start a uAPSD service period. 1643 * Waking up is implemented by simply transmitting all buffered (and 1644 * filtered) frames to the station. This is the easiest case. When 1645 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1646 * will inform the driver of this with the @allow_buffered_frames 1647 * callback; this callback is optional. mac80211 will then transmit 1648 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1649 * on each frame. The last frame in the service period (or the only 1650 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1651 * indicate that it ends the service period; as this frame must have 1652 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1653 * When TX status is reported for this frame, the service period is 1654 * marked has having ended and a new one can be started by the peer. 1655 * 1656 * Additionally, non-bufferable MMPDUs can also be transmitted by 1657 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1658 * 1659 * Another race condition can happen on some devices like iwlwifi 1660 * when there are frames queued for the station and it wakes up 1661 * or polls; the frames that are already queued could end up being 1662 * transmitted first instead, causing reordering and/or wrong 1663 * processing of the EOSP. The cause is that allowing frames to be 1664 * transmitted to a certain station is out-of-band communication to 1665 * the device. To allow this problem to be solved, the driver can 1666 * call ieee80211_sta_block_awake() if frames are buffered when it 1667 * is notified that the station went to sleep. When all these frames 1668 * have been filtered (see above), it must call the function again 1669 * to indicate that the station is no longer blocked. 1670 * 1671 * If the driver buffers frames in the driver for aggregation in any 1672 * way, it must use the ieee80211_sta_set_buffered() call when it is 1673 * notified of the station going to sleep to inform mac80211 of any 1674 * TIDs that have frames buffered. Note that when a station wakes up 1675 * this information is reset (hence the requirement to call it when 1676 * informed of the station going to sleep). Then, when a service 1677 * period starts for any reason, @release_buffered_frames is called 1678 * with the number of frames to be released and which TIDs they are 1679 * to come from. In this case, the driver is responsible for setting 1680 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1681 * to help the @more_data paramter is passed to tell the driver if 1682 * there is more data on other TIDs -- the TIDs to release frames 1683 * from are ignored since mac80211 doesn't know how many frames the 1684 * buffers for those TIDs contain. 1685 * 1686 * If the driver also implement GO mode, where absence periods may 1687 * shorten service periods (or abort PS-Poll responses), it must 1688 * filter those response frames except in the case of frames that 1689 * are buffered in the driver -- those must remain buffered to avoid 1690 * reordering. Because it is possible that no frames are released 1691 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1692 * to indicate to mac80211 that the service period ended anyway. 1693 * 1694 * Finally, if frames from multiple TIDs are released from mac80211 1695 * but the driver might reorder them, it must clear & set the flags 1696 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1697 * and also take care of the EOSP and MORE_DATA bits in the frame. 1698 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1699 */ 1700 1701/** 1702 * enum ieee80211_filter_flags - hardware filter flags 1703 * 1704 * These flags determine what the filter in hardware should be 1705 * programmed to let through and what should not be passed to the 1706 * stack. It is always safe to pass more frames than requested, 1707 * but this has negative impact on power consumption. 1708 * 1709 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1710 * think of the BSS as your network segment and then this corresponds 1711 * to the regular ethernet device promiscuous mode. 1712 * 1713 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1714 * by the user or if the hardware is not capable of filtering by 1715 * multicast address. 1716 * 1717 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1718 * %RX_FLAG_FAILED_FCS_CRC for them) 1719 * 1720 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1721 * the %RX_FLAG_FAILED_PLCP_CRC for them 1722 * 1723 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1724 * to the hardware that it should not filter beacons or probe responses 1725 * by BSSID. Filtering them can greatly reduce the amount of processing 1726 * mac80211 needs to do and the amount of CPU wakeups, so you should 1727 * honour this flag if possible. 1728 * 1729 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1730 * is not set then only those addressed to this station. 1731 * 1732 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1733 * 1734 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1735 * those addressed to this station. 1736 * 1737 * @FIF_PROBE_REQ: pass probe request frames 1738 */ 1739enum ieee80211_filter_flags { 1740 FIF_PROMISC_IN_BSS = 1<<0, 1741 FIF_ALLMULTI = 1<<1, 1742 FIF_FCSFAIL = 1<<2, 1743 FIF_PLCPFAIL = 1<<3, 1744 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1745 FIF_CONTROL = 1<<5, 1746 FIF_OTHER_BSS = 1<<6, 1747 FIF_PSPOLL = 1<<7, 1748 FIF_PROBE_REQ = 1<<8, 1749}; 1750 1751/** 1752 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1753 * 1754 * These flags are used with the ampdu_action() callback in 1755 * &struct ieee80211_ops to indicate which action is needed. 1756 * 1757 * Note that drivers MUST be able to deal with a TX aggregation 1758 * session being stopped even before they OK'ed starting it by 1759 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1760 * might receive the addBA frame and send a delBA right away! 1761 * 1762 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1763 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1764 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1765 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1766 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1767 */ 1768enum ieee80211_ampdu_mlme_action { 1769 IEEE80211_AMPDU_RX_START, 1770 IEEE80211_AMPDU_RX_STOP, 1771 IEEE80211_AMPDU_TX_START, 1772 IEEE80211_AMPDU_TX_STOP, 1773 IEEE80211_AMPDU_TX_OPERATIONAL, 1774}; 1775 1776/** 1777 * enum ieee80211_frame_release_type - frame release reason 1778 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 1779 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 1780 * frame received on trigger-enabled AC 1781 */ 1782enum ieee80211_frame_release_type { 1783 IEEE80211_FRAME_RELEASE_PSPOLL, 1784 IEEE80211_FRAME_RELEASE_UAPSD, 1785}; 1786 1787/** 1788 * enum ieee80211_rate_control_changed - flags to indicate what changed 1789 * 1790 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 1791 * to this station changed. 1792 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 1793 */ 1794enum ieee80211_rate_control_changed { 1795 IEEE80211_RC_BW_CHANGED = BIT(0), 1796 IEEE80211_RC_SMPS_CHANGED = BIT(1), 1797}; 1798 1799/** 1800 * struct ieee80211_ops - callbacks from mac80211 to the driver 1801 * 1802 * This structure contains various callbacks that the driver may 1803 * handle or, in some cases, must handle, for example to configure 1804 * the hardware to a new channel or to transmit a frame. 1805 * 1806 * @tx: Handler that 802.11 module calls for each transmitted frame. 1807 * skb contains the buffer starting from the IEEE 802.11 header. 1808 * The low-level driver should send the frame out based on 1809 * configuration in the TX control data. This handler should, 1810 * preferably, never fail and stop queues appropriately. 1811 * This must be implemented if @tx_frags is not. 1812 * Must be atomic. 1813 * 1814 * @tx_frags: Called to transmit multiple fragments of a single MSDU. 1815 * This handler must consume all fragments, sending out some of 1816 * them only is useless and it can't ask for some of them to be 1817 * queued again. If the frame is not fragmented the queue has a 1818 * single SKB only. To avoid issues with the networking stack 1819 * when TX status is reported the frames should be removed from 1820 * the skb queue. 1821 * If this is used, the tx_info @vif and @sta pointers will be 1822 * invalid -- you must not use them in that case. 1823 * This must be implemented if @tx isn't. 1824 * Must be atomic. 1825 * 1826 * @start: Called before the first netdevice attached to the hardware 1827 * is enabled. This should turn on the hardware and must turn on 1828 * frame reception (for possibly enabled monitor interfaces.) 1829 * Returns negative error codes, these may be seen in userspace, 1830 * or zero. 1831 * When the device is started it should not have a MAC address 1832 * to avoid acknowledging frames before a non-monitor device 1833 * is added. 1834 * Must be implemented and can sleep. 1835 * 1836 * @stop: Called after last netdevice attached to the hardware 1837 * is disabled. This should turn off the hardware (at least 1838 * it must turn off frame reception.) 1839 * May be called right after add_interface if that rejects 1840 * an interface. If you added any work onto the mac80211 workqueue 1841 * you should ensure to cancel it on this callback. 1842 * Must be implemented and can sleep. 1843 * 1844 * @suspend: Suspend the device; mac80211 itself will quiesce before and 1845 * stop transmitting and doing any other configuration, and then 1846 * ask the device to suspend. This is only invoked when WoWLAN is 1847 * configured, otherwise the device is deconfigured completely and 1848 * reconfigured at resume time. 1849 * The driver may also impose special conditions under which it 1850 * wants to use the "normal" suspend (deconfigure), say if it only 1851 * supports WoWLAN when the device is associated. In this case, it 1852 * must return 1 from this function. 1853 * 1854 * @resume: If WoWLAN was configured, this indicates that mac80211 is 1855 * now resuming its operation, after this the device must be fully 1856 * functional again. If this returns an error, the only way out is 1857 * to also unregister the device. If it returns 1, then mac80211 1858 * will also go through the regular complete restart on resume. 1859 * 1860 * @add_interface: Called when a netdevice attached to the hardware is 1861 * enabled. Because it is not called for monitor mode devices, @start 1862 * and @stop must be implemented. 1863 * The driver should perform any initialization it needs before 1864 * the device can be enabled. The initial configuration for the 1865 * interface is given in the conf parameter. 1866 * The callback may refuse to add an interface by returning a 1867 * negative error code (which will be seen in userspace.) 1868 * Must be implemented and can sleep. 1869 * 1870 * @change_interface: Called when a netdevice changes type. This callback 1871 * is optional, but only if it is supported can interface types be 1872 * switched while the interface is UP. The callback may sleep. 1873 * Note that while an interface is being switched, it will not be 1874 * found by the interface iteration callbacks. 1875 * 1876 * @remove_interface: Notifies a driver that an interface is going down. 1877 * The @stop callback is called after this if it is the last interface 1878 * and no monitor interfaces are present. 1879 * When all interfaces are removed, the MAC address in the hardware 1880 * must be cleared so the device no longer acknowledges packets, 1881 * the mac_addr member of the conf structure is, however, set to the 1882 * MAC address of the device going away. 1883 * Hence, this callback must be implemented. It can sleep. 1884 * 1885 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1886 * function to change hardware configuration, e.g., channel. 1887 * This function should never fail but returns a negative error code 1888 * if it does. The callback can sleep. 1889 * 1890 * @bss_info_changed: Handler for configuration requests related to BSS 1891 * parameters that may vary during BSS's lifespan, and may affect low 1892 * level driver (e.g. assoc/disassoc status, erp parameters). 1893 * This function should not be used if no BSS has been set, unless 1894 * for association indication. The @changed parameter indicates which 1895 * of the bss parameters has changed when a call is made. The callback 1896 * can sleep. 1897 * 1898 * @prepare_multicast: Prepare for multicast filter configuration. 1899 * This callback is optional, and its return value is passed 1900 * to configure_filter(). This callback must be atomic. 1901 * 1902 * @configure_filter: Configure the device's RX filter. 1903 * See the section "Frame filtering" for more information. 1904 * This callback must be implemented and can sleep. 1905 * 1906 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1907 * must be set or cleared for a given STA. Must be atomic. 1908 * 1909 * @set_key: See the section "Hardware crypto acceleration" 1910 * This callback is only called between add_interface and 1911 * remove_interface calls, i.e. while the given virtual interface 1912 * is enabled. 1913 * Returns a negative error code if the key can't be added. 1914 * The callback can sleep. 1915 * 1916 * @update_tkip_key: See the section "Hardware crypto acceleration" 1917 * This callback will be called in the context of Rx. Called for drivers 1918 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1919 * The callback must be atomic. 1920 * 1921 * @set_rekey_data: If the device supports GTK rekeying, for example while the 1922 * host is suspended, it can assign this callback to retrieve the data 1923 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 1924 * After rekeying was done it should (for example during resume) notify 1925 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 1926 * 1927 * @hw_scan: Ask the hardware to service the scan request, no need to start 1928 * the scan state machine in stack. The scan must honour the channel 1929 * configuration done by the regulatory agent in the wiphy's 1930 * registered bands. The hardware (or the driver) needs to make sure 1931 * that power save is disabled. 1932 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1933 * entire IEs after the SSID, so that drivers need not look at these 1934 * at all but just send them after the SSID -- mac80211 includes the 1935 * (extended) supported rates and HT information (where applicable). 1936 * When the scan finishes, ieee80211_scan_completed() must be called; 1937 * note that it also must be called when the scan cannot finish due to 1938 * any error unless this callback returned a negative error code. 1939 * The callback can sleep. 1940 * 1941 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 1942 * The driver should ask the hardware to cancel the scan (if possible), 1943 * but the scan will be completed only after the driver will call 1944 * ieee80211_scan_completed(). 1945 * This callback is needed for wowlan, to prevent enqueueing a new 1946 * scan_work after the low-level driver was already suspended. 1947 * The callback can sleep. 1948 * 1949 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 1950 * specific intervals. The driver must call the 1951 * ieee80211_sched_scan_results() function whenever it finds results. 1952 * This process will continue until sched_scan_stop is called. 1953 * 1954 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 1955 * 1956 * @sw_scan_start: Notifier function that is called just before a software scan 1957 * is started. Can be NULL, if the driver doesn't need this notification. 1958 * The callback can sleep. 1959 * 1960 * @sw_scan_complete: Notifier function that is called just after a 1961 * software scan finished. Can be NULL, if the driver doesn't need 1962 * this notification. 1963 * The callback can sleep. 1964 * 1965 * @get_stats: Return low-level statistics. 1966 * Returns zero if statistics are available. 1967 * The callback can sleep. 1968 * 1969 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1970 * callback should be provided to read the TKIP transmit IVs (both IV32 1971 * and IV16) for the given key from hardware. 1972 * The callback must be atomic. 1973 * 1974 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 1975 * if the device does fragmentation by itself; if this callback is 1976 * implemented then the stack will not do fragmentation. 1977 * The callback can sleep. 1978 * 1979 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1980 * The callback can sleep. 1981 * 1982 * @sta_add: Notifies low level driver about addition of an associated station, 1983 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1984 * 1985 * @sta_remove: Notifies low level driver about removal of an associated 1986 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1987 * 1988 * @sta_notify: Notifies low level driver about power state transition of an 1989 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 1990 * in AP mode, this callback will not be called when the flag 1991 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 1992 * 1993 * @sta_state: Notifies low level driver about state transition of a 1994 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 1995 * This callback is mutually exclusive with @sta_add/@sta_remove. 1996 * It must not fail for down transitions but may fail for transitions 1997 * up the list of states. 1998 * The callback can sleep. 1999 * 2000 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2001 * used to transmit to the station. The changes are advertised with bits 2002 * from &enum ieee80211_rate_control_changed and the values are reflected 2003 * in the station data. This callback should only be used when the driver 2004 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2005 * otherwise the rate control algorithm is notified directly. 2006 * Must be atomic. 2007 * 2008 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2009 * bursting) for a hardware TX queue. 2010 * Returns a negative error code on failure. 2011 * The callback can sleep. 2012 * 2013 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2014 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2015 * required function. 2016 * The callback can sleep. 2017 * 2018 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2019 * Currently, this is only used for IBSS mode debugging. Is not a 2020 * required function. 2021 * The callback can sleep. 2022 * 2023 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2024 * with other STAs in the IBSS. This is only used in IBSS mode. This 2025 * function is optional if the firmware/hardware takes full care of 2026 * TSF synchronization. 2027 * The callback can sleep. 2028 * 2029 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2030 * This is needed only for IBSS mode and the result of this function is 2031 * used to determine whether to reply to Probe Requests. 2032 * Returns non-zero if this device sent the last beacon. 2033 * The callback can sleep. 2034 * 2035 * @ampdu_action: Perform a certain A-MPDU action 2036 * The RA/TID combination determines the destination and TID we want 2037 * the ampdu action to be performed for. The action is defined through 2038 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2039 * is the first frame we expect to perform the action on. Notice 2040 * that TX/RX_STOP can pass NULL for this parameter. 2041 * The @buf_size parameter is only valid when the action is set to 2042 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2043 * buffer size (number of subframes) for this session -- the driver 2044 * may neither send aggregates containing more subframes than this 2045 * nor send aggregates in a way that lost frames would exceed the 2046 * buffer size. If just limiting the aggregate size, this would be 2047 * possible with a buf_size of 8: 2048 * - TX: 1.....7 2049 * - RX: 2....7 (lost frame #1) 2050 * - TX: 8..1... 2051 * which is invalid since #1 was now re-transmitted well past the 2052 * buffer size of 8. Correct ways to retransmit #1 would be: 2053 * - TX: 1 or 18 or 81 2054 * Even "189" would be wrong since 1 could be lost again. 2055 * 2056 * Returns a negative error code on failure. 2057 * The callback can sleep. 2058 * 2059 * @get_survey: Return per-channel survey information 2060 * 2061 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2062 * need to set wiphy->rfkill_poll to %true before registration, 2063 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2064 * The callback can sleep. 2065 * 2066 * @set_coverage_class: Set slot time for given coverage class as specified 2067 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2068 * accordingly. This callback is not required and may sleep. 2069 * 2070 * @testmode_cmd: Implement a cfg80211 test mode command. 2071 * The callback can sleep. 2072 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2073 * 2074 * @flush: Flush all pending frames from the hardware queue, making sure 2075 * that the hardware queues are empty. If the parameter @drop is set 2076 * to %true, pending frames may be dropped. The callback can sleep. 2077 * 2078 * @channel_switch: Drivers that need (or want) to offload the channel 2079 * switch operation for CSAs received from the AP may implement this 2080 * callback. They must then call ieee80211_chswitch_done() to indicate 2081 * completion of the channel switch. 2082 * 2083 * @napi_poll: Poll Rx queue for incoming data frames. 2084 * 2085 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2086 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2087 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2088 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2089 * 2090 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2091 * 2092 * @remain_on_channel: Starts an off-channel period on the given channel, must 2093 * call back to ieee80211_ready_on_channel() when on that channel. Note 2094 * that normal channel traffic is not stopped as this is intended for hw 2095 * offload. Frames to transmit on the off-channel channel are transmitted 2096 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2097 * duration (which will always be non-zero) expires, the driver must call 2098 * ieee80211_remain_on_channel_expired(). This callback may sleep. 2099 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2100 * aborted before it expires. This callback may sleep. 2101 * 2102 * @set_ringparam: Set tx and rx ring sizes. 2103 * 2104 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2105 * 2106 * @tx_frames_pending: Check if there is any pending frame in the hardware 2107 * queues before entering power save. 2108 * 2109 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2110 * when transmitting a frame. Currently only legacy rates are handled. 2111 * The callback can sleep. 2112 * @rssi_callback: Notify driver when the average RSSI goes above/below 2113 * thresholds that were registered previously. The callback can sleep. 2114 * 2115 * @release_buffered_frames: Release buffered frames according to the given 2116 * parameters. In the case where the driver buffers some frames for 2117 * sleeping stations mac80211 will use this callback to tell the driver 2118 * to release some frames, either for PS-poll or uAPSD. 2119 * Note that if the @more_data paramter is %false the driver must check 2120 * if there are more frames on the given TIDs, and if there are more than 2121 * the frames being released then it must still set the more-data bit in 2122 * the frame. If the @more_data parameter is %true, then of course the 2123 * more-data bit must always be set. 2124 * The @tids parameter tells the driver which TIDs to release frames 2125 * from, for PS-poll it will always have only a single bit set. 2126 * In the case this is used for a PS-poll initiated release, the 2127 * @num_frames parameter will always be 1 so code can be shared. In 2128 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2129 * on the TX status (and must report TX status) so that the PS-poll 2130 * period is properly ended. This is used to avoid sending multiple 2131 * responses for a retried PS-poll frame. 2132 * In the case this is used for uAPSD, the @num_frames parameter may be 2133 * bigger than one, but the driver may send fewer frames (it must send 2134 * at least one, however). In this case it is also responsible for 2135 * setting the EOSP flag in the QoS header of the frames. Also, when the 2136 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2137 * on the last frame in the SP. Alternatively, it may call the function 2138 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2139 * This callback must be atomic. 2140 * @allow_buffered_frames: Prepare device to allow the given number of frames 2141 * to go out to the given station. The frames will be sent by mac80211 2142 * via the usual TX path after this call. The TX information for frames 2143 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2144 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2145 * frames from multiple TIDs are released and the driver might reorder 2146 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2147 * on the last frame and clear it on all others and also handle the EOSP 2148 * bit in the QoS header correctly. Alternatively, it can also call the 2149 * ieee80211_sta_eosp_irqsafe() function. 2150 * The @tids parameter is a bitmap and tells the driver which TIDs the 2151 * frames will be on; it will at most have two bits set. 2152 * This callback must be atomic. 2153 */ 2154struct ieee80211_ops { 2155 void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 2156 void (*tx_frags)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2157 struct ieee80211_sta *sta, struct sk_buff_head *skbs); 2158 int (*start)(struct ieee80211_hw *hw); 2159 void (*stop)(struct ieee80211_hw *hw); 2160#ifdef CONFIG_PM 2161 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2162 int (*resume)(struct ieee80211_hw *hw); 2163#endif 2164 int (*add_interface)(struct ieee80211_hw *hw, 2165 struct ieee80211_vif *vif); 2166 int (*change_interface)(struct ieee80211_hw *hw, 2167 struct ieee80211_vif *vif, 2168 enum nl80211_iftype new_type, bool p2p); 2169 void (*remove_interface)(struct ieee80211_hw *hw, 2170 struct ieee80211_vif *vif); 2171 int (*config)(struct ieee80211_hw *hw, u32 changed); 2172 void (*bss_info_changed)(struct ieee80211_hw *hw, 2173 struct ieee80211_vif *vif, 2174 struct ieee80211_bss_conf *info, 2175 u32 changed); 2176 2177 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2178 struct netdev_hw_addr_list *mc_list); 2179 void (*configure_filter)(struct ieee80211_hw *hw, 2180 unsigned int changed_flags, 2181 unsigned int *total_flags, 2182 u64 multicast); 2183 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2184 bool set); 2185 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2186 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2187 struct ieee80211_key_conf *key); 2188 void (*update_tkip_key)(struct ieee80211_hw *hw, 2189 struct ieee80211_vif *vif, 2190 struct ieee80211_key_conf *conf, 2191 struct ieee80211_sta *sta, 2192 u32 iv32, u16 *phase1key); 2193 void (*set_rekey_data)(struct ieee80211_hw *hw, 2194 struct ieee80211_vif *vif, 2195 struct cfg80211_gtk_rekey_data *data); 2196 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2197 struct cfg80211_scan_request *req); 2198 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2199 struct ieee80211_vif *vif); 2200 int (*sched_scan_start)(struct ieee80211_hw *hw, 2201 struct ieee80211_vif *vif, 2202 struct cfg80211_sched_scan_request *req, 2203 struct ieee80211_sched_scan_ies *ies); 2204 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2205 struct ieee80211_vif *vif); 2206 void (*sw_scan_start)(struct ieee80211_hw *hw); 2207 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2208 int (*get_stats)(struct ieee80211_hw *hw, 2209 struct ieee80211_low_level_stats *stats); 2210 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2211 u32 *iv32, u16 *iv16); 2212 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2213 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2214 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2215 struct ieee80211_sta *sta); 2216 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2217 struct ieee80211_sta *sta); 2218 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2219 enum sta_notify_cmd, struct ieee80211_sta *sta); 2220 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2221 struct ieee80211_sta *sta, 2222 enum ieee80211_sta_state old_state, 2223 enum ieee80211_sta_state new_state); 2224 void (*sta_rc_update)(struct ieee80211_hw *hw, 2225 struct ieee80211_vif *vif, 2226 struct ieee80211_sta *sta, 2227 u32 changed); 2228 int (*conf_tx)(struct ieee80211_hw *hw, 2229 struct ieee80211_vif *vif, u16 ac, 2230 const struct ieee80211_tx_queue_params *params); 2231 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2232 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2233 u64 tsf); 2234 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2235 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2236 int (*ampdu_action)(struct ieee80211_hw *hw, 2237 struct ieee80211_vif *vif, 2238 enum ieee80211_ampdu_mlme_action action, 2239 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2240 u8 buf_size); 2241 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2242 struct survey_info *survey); 2243 void (*rfkill_poll)(struct ieee80211_hw *hw); 2244 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2245#ifdef CONFIG_NL80211_TESTMODE 2246 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2247 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2248 struct netlink_callback *cb, 2249 void *data, int len); 2250#endif 2251 void (*flush)(struct ieee80211_hw *hw, bool drop); 2252 void (*channel_switch)(struct ieee80211_hw *hw, 2253 struct ieee80211_channel_switch *ch_switch); 2254 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2255 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2256 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2257 2258 int (*remain_on_channel)(struct ieee80211_hw *hw, 2259 struct ieee80211_channel *chan, 2260 enum nl80211_channel_type channel_type, 2261 int duration); 2262 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2263 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2264 void (*get_ringparam)(struct ieee80211_hw *hw, 2265 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2266 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2267 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2268 const struct cfg80211_bitrate_mask *mask); 2269 void (*rssi_callback)(struct ieee80211_hw *hw, 2270 enum ieee80211_rssi_event rssi_event); 2271 2272 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2273 struct ieee80211_sta *sta, 2274 u16 tids, int num_frames, 2275 enum ieee80211_frame_release_type reason, 2276 bool more_data); 2277 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2278 struct ieee80211_sta *sta, 2279 u16 tids, int num_frames, 2280 enum ieee80211_frame_release_type reason, 2281 bool more_data); 2282}; 2283 2284/** 2285 * ieee80211_alloc_hw - Allocate a new hardware device 2286 * 2287 * This must be called once for each hardware device. The returned pointer 2288 * must be used to refer to this device when calling other functions. 2289 * mac80211 allocates a private data area for the driver pointed to by 2290 * @priv in &struct ieee80211_hw, the size of this area is given as 2291 * @priv_data_len. 2292 * 2293 * @priv_data_len: length of private data 2294 * @ops: callbacks for this device 2295 */ 2296struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2297 const struct ieee80211_ops *ops); 2298 2299/** 2300 * ieee80211_register_hw - Register hardware device 2301 * 2302 * You must call this function before any other functions in 2303 * mac80211. Note that before a hardware can be registered, you 2304 * need to fill the contained wiphy's information. 2305 * 2306 * @hw: the device to register as returned by ieee80211_alloc_hw() 2307 */ 2308int ieee80211_register_hw(struct ieee80211_hw *hw); 2309 2310/** 2311 * struct ieee80211_tpt_blink - throughput blink description 2312 * @throughput: throughput in Kbit/sec 2313 * @blink_time: blink time in milliseconds 2314 * (full cycle, ie. one off + one on period) 2315 */ 2316struct ieee80211_tpt_blink { 2317 int throughput; 2318 int blink_time; 2319}; 2320 2321/** 2322 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2323 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2324 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2325 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2326 * interface is connected in some way, including being an AP 2327 */ 2328enum ieee80211_tpt_led_trigger_flags { 2329 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2330 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2331 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2332}; 2333 2334#ifdef CONFIG_MAC80211_LEDS 2335extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2336extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2337extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2338extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2339extern char *__ieee80211_create_tpt_led_trigger( 2340 struct ieee80211_hw *hw, unsigned int flags, 2341 const struct ieee80211_tpt_blink *blink_table, 2342 unsigned int blink_table_len); 2343#endif 2344/** 2345 * ieee80211_get_tx_led_name - get name of TX LED 2346 * 2347 * mac80211 creates a transmit LED trigger for each wireless hardware 2348 * that can be used to drive LEDs if your driver registers a LED device. 2349 * This function returns the name (or %NULL if not configured for LEDs) 2350 * of the trigger so you can automatically link the LED device. 2351 * 2352 * @hw: the hardware to get the LED trigger name for 2353 */ 2354static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2355{ 2356#ifdef CONFIG_MAC80211_LEDS 2357 return __ieee80211_get_tx_led_name(hw); 2358#else 2359 return NULL; 2360#endif 2361} 2362 2363/** 2364 * ieee80211_get_rx_led_name - get name of RX LED 2365 * 2366 * mac80211 creates a receive LED trigger for each wireless hardware 2367 * that can be used to drive LEDs if your driver registers a LED device. 2368 * This function returns the name (or %NULL if not configured for LEDs) 2369 * of the trigger so you can automatically link the LED device. 2370 * 2371 * @hw: the hardware to get the LED trigger name for 2372 */ 2373static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2374{ 2375#ifdef CONFIG_MAC80211_LEDS 2376 return __ieee80211_get_rx_led_name(hw); 2377#else 2378 return NULL; 2379#endif 2380} 2381 2382/** 2383 * ieee80211_get_assoc_led_name - get name of association LED 2384 * 2385 * mac80211 creates a association LED trigger for each wireless hardware 2386 * that can be used to drive LEDs if your driver registers a LED device. 2387 * This function returns the name (or %NULL if not configured for LEDs) 2388 * of the trigger so you can automatically link the LED device. 2389 * 2390 * @hw: the hardware to get the LED trigger name for 2391 */ 2392static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2393{ 2394#ifdef CONFIG_MAC80211_LEDS 2395 return __ieee80211_get_assoc_led_name(hw); 2396#else 2397 return NULL; 2398#endif 2399} 2400 2401/** 2402 * ieee80211_get_radio_led_name - get name of radio LED 2403 * 2404 * mac80211 creates a radio change LED trigger for each wireless hardware 2405 * that can be used to drive LEDs if your driver registers a LED device. 2406 * This function returns the name (or %NULL if not configured for LEDs) 2407 * of the trigger so you can automatically link the LED device. 2408 * 2409 * @hw: the hardware to get the LED trigger name for 2410 */ 2411static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2412{ 2413#ifdef CONFIG_MAC80211_LEDS 2414 return __ieee80211_get_radio_led_name(hw); 2415#else 2416 return NULL; 2417#endif 2418} 2419 2420/** 2421 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2422 * @hw: the hardware to create the trigger for 2423 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2424 * @blink_table: the blink table -- needs to be ordered by throughput 2425 * @blink_table_len: size of the blink table 2426 * 2427 * This function returns %NULL (in case of error, or if no LED 2428 * triggers are configured) or the name of the new trigger. 2429 * This function must be called before ieee80211_register_hw(). 2430 */ 2431static inline char * 2432ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2433 const struct ieee80211_tpt_blink *blink_table, 2434 unsigned int blink_table_len) 2435{ 2436#ifdef CONFIG_MAC80211_LEDS 2437 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2438 blink_table_len); 2439#else 2440 return NULL; 2441#endif 2442} 2443 2444/** 2445 * ieee80211_unregister_hw - Unregister a hardware device 2446 * 2447 * This function instructs mac80211 to free allocated resources 2448 * and unregister netdevices from the networking subsystem. 2449 * 2450 * @hw: the hardware to unregister 2451 */ 2452void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2453 2454/** 2455 * ieee80211_free_hw - free hardware descriptor 2456 * 2457 * This function frees everything that was allocated, including the 2458 * private data for the driver. You must call ieee80211_unregister_hw() 2459 * before calling this function. 2460 * 2461 * @hw: the hardware to free 2462 */ 2463void ieee80211_free_hw(struct ieee80211_hw *hw); 2464 2465/** 2466 * ieee80211_restart_hw - restart hardware completely 2467 * 2468 * Call this function when the hardware was restarted for some reason 2469 * (hardware error, ...) and the driver is unable to restore its state 2470 * by itself. mac80211 assumes that at this point the driver/hardware 2471 * is completely uninitialised and stopped, it starts the process by 2472 * calling the ->start() operation. The driver will need to reset all 2473 * internal state that it has prior to calling this function. 2474 * 2475 * @hw: the hardware to restart 2476 */ 2477void ieee80211_restart_hw(struct ieee80211_hw *hw); 2478 2479/** ieee80211_napi_schedule - schedule NAPI poll 2480 * 2481 * Use this function to schedule NAPI polling on a device. 2482 * 2483 * @hw: the hardware to start polling 2484 */ 2485void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2486 2487/** ieee80211_napi_complete - complete NAPI polling 2488 * 2489 * Use this function to finish NAPI polling on a device. 2490 * 2491 * @hw: the hardware to stop polling 2492 */ 2493void ieee80211_napi_complete(struct ieee80211_hw *hw); 2494 2495/** 2496 * ieee80211_rx - receive frame 2497 * 2498 * Use this function to hand received frames to mac80211. The receive 2499 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2500 * paged @skb is used, the driver is recommended to put the ieee80211 2501 * header of the frame on the linear part of the @skb to avoid memory 2502 * allocation and/or memcpy by the stack. 2503 * 2504 * This function may not be called in IRQ context. Calls to this function 2505 * for a single hardware must be synchronized against each other. Calls to 2506 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2507 * mixed for a single hardware. 2508 * 2509 * In process context use instead ieee80211_rx_ni(). 2510 * 2511 * @hw: the hardware this frame came in on 2512 * @skb: the buffer to receive, owned by mac80211 after this call 2513 */ 2514void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2515 2516/** 2517 * ieee80211_rx_irqsafe - receive frame 2518 * 2519 * Like ieee80211_rx() but can be called in IRQ context 2520 * (internally defers to a tasklet.) 2521 * 2522 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2523 * be mixed for a single hardware. 2524 * 2525 * @hw: the hardware this frame came in on 2526 * @skb: the buffer to receive, owned by mac80211 after this call 2527 */ 2528void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2529 2530/** 2531 * ieee80211_rx_ni - receive frame (in process context) 2532 * 2533 * Like ieee80211_rx() but can be called in process context 2534 * (internally disables bottom halves). 2535 * 2536 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2537 * not be mixed for a single hardware. 2538 * 2539 * @hw: the hardware this frame came in on 2540 * @skb: the buffer to receive, owned by mac80211 after this call 2541 */ 2542static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2543 struct sk_buff *skb) 2544{ 2545 local_bh_disable(); 2546 ieee80211_rx(hw, skb); 2547 local_bh_enable(); 2548} 2549 2550/** 2551 * ieee80211_sta_ps_transition - PS transition for connected sta 2552 * 2553 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2554 * flag set, use this function to inform mac80211 about a connected station 2555 * entering/leaving PS mode. 2556 * 2557 * This function may not be called in IRQ context or with softirqs enabled. 2558 * 2559 * Calls to this function for a single hardware must be synchronized against 2560 * each other. 2561 * 2562 * The function returns -EINVAL when the requested PS mode is already set. 2563 * 2564 * @sta: currently connected sta 2565 * @start: start or stop PS 2566 */ 2567int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2568 2569/** 2570 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2571 * (in process context) 2572 * 2573 * Like ieee80211_sta_ps_transition() but can be called in process context 2574 * (internally disables bottom halves). Concurrent call restriction still 2575 * applies. 2576 * 2577 * @sta: currently connected sta 2578 * @start: start or stop PS 2579 */ 2580static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2581 bool start) 2582{ 2583 int ret; 2584 2585 local_bh_disable(); 2586 ret = ieee80211_sta_ps_transition(sta, start); 2587 local_bh_enable(); 2588 2589 return ret; 2590} 2591 2592/* 2593 * The TX headroom reserved by mac80211 for its own tx_status functions. 2594 * This is enough for the radiotap header. 2595 */ 2596#define IEEE80211_TX_STATUS_HEADROOM 14 2597 2598/** 2599 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 2600 * @sta: &struct ieee80211_sta pointer for the sleeping station 2601 * @tid: the TID that has buffered frames 2602 * @buffered: indicates whether or not frames are buffered for this TID 2603 * 2604 * If a driver buffers frames for a powersave station instead of passing 2605 * them back to mac80211 for retransmission, the station may still need 2606 * to be told that there are buffered frames via the TIM bit. 2607 * 2608 * This function informs mac80211 whether or not there are frames that are 2609 * buffered in the driver for a given TID; mac80211 can then use this data 2610 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 2611 * call! Beware of the locking!) 2612 * 2613 * If all frames are released to the station (due to PS-poll or uAPSD) 2614 * then the driver needs to inform mac80211 that there no longer are 2615 * frames buffered. However, when the station wakes up mac80211 assumes 2616 * that all buffered frames will be transmitted and clears this data, 2617 * drivers need to make sure they inform mac80211 about all buffered 2618 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 2619 * 2620 * Note that technically mac80211 only needs to know this per AC, not per 2621 * TID, but since driver buffering will inevitably happen per TID (since 2622 * it is related to aggregation) it is easier to make mac80211 map the 2623 * TID to the AC as required instead of keeping track in all drivers that 2624 * use this API. 2625 */ 2626void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 2627 u8 tid, bool buffered); 2628 2629/** 2630 * ieee80211_tx_status - transmit status callback 2631 * 2632 * Call this function for all transmitted frames after they have been 2633 * transmitted. It is permissible to not call this function for 2634 * multicast frames but this can affect statistics. 2635 * 2636 * This function may not be called in IRQ context. Calls to this function 2637 * for a single hardware must be synchronized against each other. Calls 2638 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 2639 * may not be mixed for a single hardware. 2640 * 2641 * @hw: the hardware the frame was transmitted by 2642 * @skb: the frame that was transmitted, owned by mac80211 after this call 2643 */ 2644void ieee80211_tx_status(struct ieee80211_hw *hw, 2645 struct sk_buff *skb); 2646 2647/** 2648 * ieee80211_tx_status_ni - transmit status callback (in process context) 2649 * 2650 * Like ieee80211_tx_status() but can be called in process context. 2651 * 2652 * Calls to this function, ieee80211_tx_status() and 2653 * ieee80211_tx_status_irqsafe() may not be mixed 2654 * for a single hardware. 2655 * 2656 * @hw: the hardware the frame was transmitted by 2657 * @skb: the frame that was transmitted, owned by mac80211 after this call 2658 */ 2659static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 2660 struct sk_buff *skb) 2661{ 2662 local_bh_disable(); 2663 ieee80211_tx_status(hw, skb); 2664 local_bh_enable(); 2665} 2666 2667/** 2668 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 2669 * 2670 * Like ieee80211_tx_status() but can be called in IRQ context 2671 * (internally defers to a tasklet.) 2672 * 2673 * Calls to this function, ieee80211_tx_status() and 2674 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 2675 * 2676 * @hw: the hardware the frame was transmitted by 2677 * @skb: the frame that was transmitted, owned by mac80211 after this call 2678 */ 2679void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2680 struct sk_buff *skb); 2681 2682/** 2683 * ieee80211_report_low_ack - report non-responding station 2684 * 2685 * When operating in AP-mode, call this function to report a non-responding 2686 * connected STA. 2687 * 2688 * @sta: the non-responding connected sta 2689 * @num_packets: number of packets sent to @sta without a response 2690 */ 2691void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 2692 2693/** 2694 * ieee80211_beacon_get_tim - beacon generation function 2695 * @hw: pointer obtained from ieee80211_alloc_hw(). 2696 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2697 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2698 * Set to 0 if invalid (in non-AP modes). 2699 * @tim_length: pointer to variable that will receive the TIM IE length, 2700 * (including the ID and length bytes!). 2701 * Set to 0 if invalid (in non-AP modes). 2702 * 2703 * If the driver implements beaconing modes, it must use this function to 2704 * obtain the beacon frame/template. 2705 * 2706 * If the beacon frames are generated by the host system (i.e., not in 2707 * hardware/firmware), the driver uses this function to get each beacon 2708 * frame from mac80211 -- it is responsible for calling this function 2709 * before the beacon is needed (e.g. based on hardware interrupt). 2710 * 2711 * If the beacon frames are generated by the device, then the driver 2712 * must use the returned beacon as the template and change the TIM IE 2713 * according to the current DTIM parameters/TIM bitmap. 2714 * 2715 * The driver is responsible for freeing the returned skb. 2716 */ 2717struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2718 struct ieee80211_vif *vif, 2719 u16 *tim_offset, u16 *tim_length); 2720 2721/** 2722 * ieee80211_beacon_get - beacon generation function 2723 * @hw: pointer obtained from ieee80211_alloc_hw(). 2724 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2725 * 2726 * See ieee80211_beacon_get_tim(). 2727 */ 2728static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2729 struct ieee80211_vif *vif) 2730{ 2731 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2732} 2733 2734/** 2735 * ieee80211_proberesp_get - retrieve a Probe Response template 2736 * @hw: pointer obtained from ieee80211_alloc_hw(). 2737 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2738 * 2739 * Creates a Probe Response template which can, for example, be uploaded to 2740 * hardware. The destination address should be set by the caller. 2741 * 2742 * Can only be called in AP mode. 2743 */ 2744struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 2745 struct ieee80211_vif *vif); 2746 2747/** 2748 * ieee80211_pspoll_get - retrieve a PS Poll template 2749 * @hw: pointer obtained from ieee80211_alloc_hw(). 2750 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2751 * 2752 * Creates a PS Poll a template which can, for example, uploaded to 2753 * hardware. The template must be updated after association so that correct 2754 * AID, BSSID and MAC address is used. 2755 * 2756 * Note: Caller (or hardware) is responsible for setting the 2757 * &IEEE80211_FCTL_PM bit. 2758 */ 2759struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2760 struct ieee80211_vif *vif); 2761 2762/** 2763 * ieee80211_nullfunc_get - retrieve a nullfunc template 2764 * @hw: pointer obtained from ieee80211_alloc_hw(). 2765 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2766 * 2767 * Creates a Nullfunc template which can, for example, uploaded to 2768 * hardware. The template must be updated after association so that correct 2769 * BSSID and address is used. 2770 * 2771 * Note: Caller (or hardware) is responsible for setting the 2772 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2773 */ 2774struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2775 struct ieee80211_vif *vif); 2776 2777/** 2778 * ieee80211_probereq_get - retrieve a Probe Request template 2779 * @hw: pointer obtained from ieee80211_alloc_hw(). 2780 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2781 * @ssid: SSID buffer 2782 * @ssid_len: length of SSID 2783 * @ie: buffer containing all IEs except SSID for the template 2784 * @ie_len: length of the IE buffer 2785 * 2786 * Creates a Probe Request template which can, for example, be uploaded to 2787 * hardware. 2788 */ 2789struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2790 struct ieee80211_vif *vif, 2791 const u8 *ssid, size_t ssid_len, 2792 const u8 *ie, size_t ie_len); 2793 2794/** 2795 * ieee80211_rts_get - RTS frame generation function 2796 * @hw: pointer obtained from ieee80211_alloc_hw(). 2797 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2798 * @frame: pointer to the frame that is going to be protected by the RTS. 2799 * @frame_len: the frame length (in octets). 2800 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2801 * @rts: The buffer where to store the RTS frame. 2802 * 2803 * If the RTS frames are generated by the host system (i.e., not in 2804 * hardware/firmware), the low-level driver uses this function to receive 2805 * the next RTS frame from the 802.11 code. The low-level is responsible 2806 * for calling this function before and RTS frame is needed. 2807 */ 2808void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2809 const void *frame, size_t frame_len, 2810 const struct ieee80211_tx_info *frame_txctl, 2811 struct ieee80211_rts *rts); 2812 2813/** 2814 * ieee80211_rts_duration - Get the duration field for an RTS frame 2815 * @hw: pointer obtained from ieee80211_alloc_hw(). 2816 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2817 * @frame_len: the length of the frame that is going to be protected by the RTS. 2818 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2819 * 2820 * If the RTS is generated in firmware, but the host system must provide 2821 * the duration field, the low-level driver uses this function to receive 2822 * the duration field value in little-endian byteorder. 2823 */ 2824__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2825 struct ieee80211_vif *vif, size_t frame_len, 2826 const struct ieee80211_tx_info *frame_txctl); 2827 2828/** 2829 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2830 * @hw: pointer obtained from ieee80211_alloc_hw(). 2831 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2832 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2833 * @frame_len: the frame length (in octets). 2834 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2835 * @cts: The buffer where to store the CTS-to-self frame. 2836 * 2837 * If the CTS-to-self frames are generated by the host system (i.e., not in 2838 * hardware/firmware), the low-level driver uses this function to receive 2839 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2840 * for calling this function before and CTS-to-self frame is needed. 2841 */ 2842void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2843 struct ieee80211_vif *vif, 2844 const void *frame, size_t frame_len, 2845 const struct ieee80211_tx_info *frame_txctl, 2846 struct ieee80211_cts *cts); 2847 2848/** 2849 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2850 * @hw: pointer obtained from ieee80211_alloc_hw(). 2851 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2852 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2853 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2854 * 2855 * If the CTS-to-self is generated in firmware, but the host system must provide 2856 * the duration field, the low-level driver uses this function to receive 2857 * the duration field value in little-endian byteorder. 2858 */ 2859__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2860 struct ieee80211_vif *vif, 2861 size_t frame_len, 2862 const struct ieee80211_tx_info *frame_txctl); 2863 2864/** 2865 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2866 * @hw: pointer obtained from ieee80211_alloc_hw(). 2867 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2868 * @frame_len: the length of the frame. 2869 * @rate: the rate at which the frame is going to be transmitted. 2870 * 2871 * Calculate the duration field of some generic frame, given its 2872 * length and transmission rate (in 100kbps). 2873 */ 2874__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2875 struct ieee80211_vif *vif, 2876 size_t frame_len, 2877 struct ieee80211_rate *rate); 2878 2879/** 2880 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2881 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2882 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2883 * 2884 * Function for accessing buffered broadcast and multicast frames. If 2885 * hardware/firmware does not implement buffering of broadcast/multicast 2886 * frames when power saving is used, 802.11 code buffers them in the host 2887 * memory. The low-level driver uses this function to fetch next buffered 2888 * frame. In most cases, this is used when generating beacon frame. This 2889 * function returns a pointer to the next buffered skb or NULL if no more 2890 * buffered frames are available. 2891 * 2892 * Note: buffered frames are returned only after DTIM beacon frame was 2893 * generated with ieee80211_beacon_get() and the low-level driver must thus 2894 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2895 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2896 * does not need to check for DTIM beacons separately and should be able to 2897 * use common code for all beacons. 2898 */ 2899struct sk_buff * 2900ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2901 2902/** 2903 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 2904 * 2905 * This function returns the TKIP phase 1 key for the given IV32. 2906 * 2907 * @keyconf: the parameter passed with the set key 2908 * @iv32: IV32 to get the P1K for 2909 * @p1k: a buffer to which the key will be written, as 5 u16 values 2910 */ 2911void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 2912 u32 iv32, u16 *p1k); 2913 2914/** 2915 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 2916 * 2917 * This function returns the TKIP phase 1 key for the IV32 taken 2918 * from the given packet. 2919 * 2920 * @keyconf: the parameter passed with the set key 2921 * @skb: the packet to take the IV32 value from that will be encrypted 2922 * with this P1K 2923 * @p1k: a buffer to which the key will be written, as 5 u16 values 2924 */ 2925static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 2926 struct sk_buff *skb, u16 *p1k) 2927{ 2928 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2929 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 2930 u32 iv32 = get_unaligned_le32(&data[4]); 2931 2932 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 2933} 2934 2935/** 2936 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 2937 * 2938 * This function returns the TKIP phase 1 key for the given IV32 2939 * and transmitter address. 2940 * 2941 * @keyconf: the parameter passed with the set key 2942 * @ta: TA that will be used with the key 2943 * @iv32: IV32 to get the P1K for 2944 * @p1k: a buffer to which the key will be written, as 5 u16 values 2945 */ 2946void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 2947 const u8 *ta, u32 iv32, u16 *p1k); 2948 2949/** 2950 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 2951 * 2952 * This function computes the TKIP RC4 key for the IV values 2953 * in the packet. 2954 * 2955 * @keyconf: the parameter passed with the set key 2956 * @skb: the packet to take the IV32/IV16 values from that will be 2957 * encrypted with this key 2958 * @p2k: a buffer to which the key will be written, 16 bytes 2959 */ 2960void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 2961 struct sk_buff *skb, u8 *p2k); 2962 2963/** 2964 * struct ieee80211_key_seq - key sequence counter 2965 * 2966 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 2967 * @ccmp: PN data, most significant byte first (big endian, 2968 * reverse order than in packet) 2969 * @aes_cmac: PN data, most significant byte first (big endian, 2970 * reverse order than in packet) 2971 */ 2972struct ieee80211_key_seq { 2973 union { 2974 struct { 2975 u32 iv32; 2976 u16 iv16; 2977 } tkip; 2978 struct { 2979 u8 pn[6]; 2980 } ccmp; 2981 struct { 2982 u8 pn[6]; 2983 } aes_cmac; 2984 }; 2985}; 2986 2987/** 2988 * ieee80211_get_key_tx_seq - get key TX sequence counter 2989 * 2990 * @keyconf: the parameter passed with the set key 2991 * @seq: buffer to receive the sequence data 2992 * 2993 * This function allows a driver to retrieve the current TX IV/PN 2994 * for the given key. It must not be called if IV generation is 2995 * offloaded to the device. 2996 * 2997 * Note that this function may only be called when no TX processing 2998 * can be done concurrently, for example when queues are stopped 2999 * and the stop has been synchronized. 3000 */ 3001void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3002 struct ieee80211_key_seq *seq); 3003 3004/** 3005 * ieee80211_get_key_rx_seq - get key RX sequence counter 3006 * 3007 * @keyconf: the parameter passed with the set key 3008 * @tid: The TID, or -1 for the management frame value (CCMP only); 3009 * the value on TID 0 is also used for non-QoS frames. For 3010 * CMAC, only TID 0 is valid. 3011 * @seq: buffer to receive the sequence data 3012 * 3013 * This function allows a driver to retrieve the current RX IV/PNs 3014 * for the given key. It must not be called if IV checking is done 3015 * by the device and not by mac80211. 3016 * 3017 * Note that this function may only be called when no RX processing 3018 * can be done concurrently. 3019 */ 3020void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3021 int tid, struct ieee80211_key_seq *seq); 3022 3023/** 3024 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3025 * @vif: virtual interface the rekeying was done on 3026 * @bssid: The BSSID of the AP, for checking association 3027 * @replay_ctr: the new replay counter after GTK rekeying 3028 * @gfp: allocation flags 3029 */ 3030void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3031 const u8 *replay_ctr, gfp_t gfp); 3032 3033/** 3034 * ieee80211_wake_queue - wake specific queue 3035 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3036 * @queue: queue number (counted from zero). 3037 * 3038 * Drivers should use this function instead of netif_wake_queue. 3039 */ 3040void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3041 3042/** 3043 * ieee80211_stop_queue - stop specific queue 3044 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3045 * @queue: queue number (counted from zero). 3046 * 3047 * Drivers should use this function instead of netif_stop_queue. 3048 */ 3049void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3050 3051/** 3052 * ieee80211_queue_stopped - test status of the queue 3053 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3054 * @queue: queue number (counted from zero). 3055 * 3056 * Drivers should use this function instead of netif_stop_queue. 3057 */ 3058 3059int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3060 3061/** 3062 * ieee80211_stop_queues - stop all queues 3063 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3064 * 3065 * Drivers should use this function instead of netif_stop_queue. 3066 */ 3067void ieee80211_stop_queues(struct ieee80211_hw *hw); 3068 3069/** 3070 * ieee80211_wake_queues - wake all queues 3071 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3072 * 3073 * Drivers should use this function instead of netif_wake_queue. 3074 */ 3075void ieee80211_wake_queues(struct ieee80211_hw *hw); 3076 3077/** 3078 * ieee80211_scan_completed - completed hardware scan 3079 * 3080 * When hardware scan offload is used (i.e. the hw_scan() callback is 3081 * assigned) this function needs to be called by the driver to notify 3082 * mac80211 that the scan finished. This function can be called from 3083 * any context, including hardirq context. 3084 * 3085 * @hw: the hardware that finished the scan 3086 * @aborted: set to true if scan was aborted 3087 */ 3088void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3089 3090/** 3091 * ieee80211_sched_scan_results - got results from scheduled scan 3092 * 3093 * When a scheduled scan is running, this function needs to be called by the 3094 * driver whenever there are new scan results available. 3095 * 3096 * @hw: the hardware that is performing scheduled scans 3097 */ 3098void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3099 3100/** 3101 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3102 * 3103 * When a scheduled scan is running, this function can be called by 3104 * the driver if it needs to stop the scan to perform another task. 3105 * Usual scenarios are drivers that cannot continue the scheduled scan 3106 * while associating, for instance. 3107 * 3108 * @hw: the hardware that is performing scheduled scans 3109 */ 3110void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3111 3112/** 3113 * ieee80211_iterate_active_interfaces - iterate active interfaces 3114 * 3115 * This function iterates over the interfaces associated with a given 3116 * hardware that are currently active and calls the callback for them. 3117 * This function allows the iterator function to sleep, when the iterator 3118 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3119 * be used. 3120 * Does not iterate over a new interface during add_interface() 3121 * 3122 * @hw: the hardware struct of which the interfaces should be iterated over 3123 * @iterator: the iterator function to call 3124 * @data: first argument of the iterator function 3125 */ 3126void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3127 void (*iterator)(void *data, u8 *mac, 3128 struct ieee80211_vif *vif), 3129 void *data); 3130 3131/** 3132 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3133 * 3134 * This function iterates over the interfaces associated with a given 3135 * hardware that are currently active and calls the callback for them. 3136 * This function requires the iterator callback function to be atomic, 3137 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3138 * Does not iterate over a new interface during add_interface() 3139 * 3140 * @hw: the hardware struct of which the interfaces should be iterated over 3141 * @iterator: the iterator function to call, cannot sleep 3142 * @data: first argument of the iterator function 3143 */ 3144void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3145 void (*iterator)(void *data, 3146 u8 *mac, 3147 struct ieee80211_vif *vif), 3148 void *data); 3149 3150/** 3151 * ieee80211_queue_work - add work onto the mac80211 workqueue 3152 * 3153 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3154 * This helper ensures drivers are not queueing work when they should not be. 3155 * 3156 * @hw: the hardware struct for the interface we are adding work for 3157 * @work: the work we want to add onto the mac80211 workqueue 3158 */ 3159void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3160 3161/** 3162 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3163 * 3164 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3165 * workqueue. 3166 * 3167 * @hw: the hardware struct for the interface we are adding work for 3168 * @dwork: delayable work to queue onto the mac80211 workqueue 3169 * @delay: number of jiffies to wait before queueing 3170 */ 3171void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3172 struct delayed_work *dwork, 3173 unsigned long delay); 3174 3175/** 3176 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3177 * @sta: the station for which to start a BA session 3178 * @tid: the TID to BA on. 3179 * @timeout: session timeout value (in TUs) 3180 * 3181 * Return: success if addBA request was sent, failure otherwise 3182 * 3183 * Although mac80211/low level driver/user space application can estimate 3184 * the need to start aggregation on a certain RA/TID, the session level 3185 * will be managed by the mac80211. 3186 */ 3187int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3188 u16 timeout); 3189 3190/** 3191 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3192 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3193 * @ra: receiver address of the BA session recipient. 3194 * @tid: the TID to BA on. 3195 * 3196 * This function must be called by low level driver once it has 3197 * finished with preparations for the BA session. It can be called 3198 * from any context. 3199 */ 3200void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3201 u16 tid); 3202 3203/** 3204 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3205 * @sta: the station whose BA session to stop 3206 * @tid: the TID to stop BA. 3207 * 3208 * Return: negative error if the TID is invalid, or no aggregation active 3209 * 3210 * Although mac80211/low level driver/user space application can estimate 3211 * the need to stop aggregation on a certain RA/TID, the session level 3212 * will be managed by the mac80211. 3213 */ 3214int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3215 3216/** 3217 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3218 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3219 * @ra: receiver address of the BA session recipient. 3220 * @tid: the desired TID to BA on. 3221 * 3222 * This function must be called by low level driver once it has 3223 * finished with preparations for the BA session tear down. It 3224 * can be called from any context. 3225 */ 3226void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3227 u16 tid); 3228 3229/** 3230 * ieee80211_find_sta - find a station 3231 * 3232 * @vif: virtual interface to look for station on 3233 * @addr: station's address 3234 * 3235 * This function must be called under RCU lock and the 3236 * resulting pointer is only valid under RCU lock as well. 3237 */ 3238struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3239 const u8 *addr); 3240 3241/** 3242 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3243 * 3244 * @hw: pointer as obtained from ieee80211_alloc_hw() 3245 * @addr: remote station's address 3246 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3247 * 3248 * This function must be called under RCU lock and the 3249 * resulting pointer is only valid under RCU lock as well. 3250 * 3251 * NOTE: You may pass NULL for localaddr, but then you will just get 3252 * the first STA that matches the remote address 'addr'. 3253 * We can have multiple STA associated with multiple 3254 * logical stations (e.g. consider a station connecting to another 3255 * BSSID on the same AP hardware without disconnecting first). 3256 * In this case, the result of this method with localaddr NULL 3257 * is not reliable. 3258 * 3259 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3260 */ 3261struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3262 const u8 *addr, 3263 const u8 *localaddr); 3264 3265/** 3266 * ieee80211_sta_block_awake - block station from waking up 3267 * @hw: the hardware 3268 * @pubsta: the station 3269 * @block: whether to block or unblock 3270 * 3271 * Some devices require that all frames that are on the queues 3272 * for a specific station that went to sleep are flushed before 3273 * a poll response or frames after the station woke up can be 3274 * delivered to that it. Note that such frames must be rejected 3275 * by the driver as filtered, with the appropriate status flag. 3276 * 3277 * This function allows implementing this mode in a race-free 3278 * manner. 3279 * 3280 * To do this, a driver must keep track of the number of frames 3281 * still enqueued for a specific station. If this number is not 3282 * zero when the station goes to sleep, the driver must call 3283 * this function to force mac80211 to consider the station to 3284 * be asleep regardless of the station's actual state. Once the 3285 * number of outstanding frames reaches zero, the driver must 3286 * call this function again to unblock the station. That will 3287 * cause mac80211 to be able to send ps-poll responses, and if 3288 * the station queried in the meantime then frames will also 3289 * be sent out as a result of this. Additionally, the driver 3290 * will be notified that the station woke up some time after 3291 * it is unblocked, regardless of whether the station actually 3292 * woke up while blocked or not. 3293 */ 3294void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3295 struct ieee80211_sta *pubsta, bool block); 3296 3297/** 3298 * ieee80211_sta_eosp - notify mac80211 about end of SP 3299 * @pubsta: the station 3300 * 3301 * When a device transmits frames in a way that it can't tell 3302 * mac80211 in the TX status about the EOSP, it must clear the 3303 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3304 * This applies for PS-Poll as well as uAPSD. 3305 * 3306 * Note that there is no non-_irqsafe version right now as 3307 * it wasn't needed, but just like _tx_status() and _rx() 3308 * must not be mixed in irqsafe/non-irqsafe versions, this 3309 * function must not be mixed with those either. Use the 3310 * all irqsafe, or all non-irqsafe, don't mix! If you need 3311 * the non-irqsafe version of this, you need to add it. 3312 */ 3313void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3314 3315/** 3316 * ieee80211_iter_keys - iterate keys programmed into the device 3317 * @hw: pointer obtained from ieee80211_alloc_hw() 3318 * @vif: virtual interface to iterate, may be %NULL for all 3319 * @iter: iterator function that will be called for each key 3320 * @iter_data: custom data to pass to the iterator function 3321 * 3322 * This function can be used to iterate all the keys known to 3323 * mac80211, even those that weren't previously programmed into 3324 * the device. This is intended for use in WoWLAN if the device 3325 * needs reprogramming of the keys during suspend. Note that due 3326 * to locking reasons, it is also only safe to call this at few 3327 * spots since it must hold the RTNL and be able to sleep. 3328 * 3329 * The order in which the keys are iterated matches the order 3330 * in which they were originally installed and handed to the 3331 * set_key callback. 3332 */ 3333void ieee80211_iter_keys(struct ieee80211_hw *hw, 3334 struct ieee80211_vif *vif, 3335 void (*iter)(struct ieee80211_hw *hw, 3336 struct ieee80211_vif *vif, 3337 struct ieee80211_sta *sta, 3338 struct ieee80211_key_conf *key, 3339 void *data), 3340 void *iter_data); 3341 3342/** 3343 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3344 * @hw: pointer obtained from ieee80211_alloc_hw(). 3345 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3346 * 3347 * Creates a Probe Request template which can, for example, be uploaded to 3348 * hardware. The template is filled with bssid, ssid and supported rate 3349 * information. This function must only be called from within the 3350 * .bss_info_changed callback function and only in managed mode. The function 3351 * is only useful when the interface is associated, otherwise it will return 3352 * NULL. 3353 */ 3354struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3355 struct ieee80211_vif *vif); 3356 3357/** 3358 * ieee80211_beacon_loss - inform hardware does not receive beacons 3359 * 3360 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3361 * 3362 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3363 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3364 * hardware is not receiving beacons with this function. 3365 */ 3366void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3367 3368/** 3369 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3370 * 3371 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3372 * 3373 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3374 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3375 * needs to inform if the connection to the AP has been lost. 3376 * 3377 * This function will cause immediate change to disassociated state, 3378 * without connection recovery attempts. 3379 */ 3380void ieee80211_connection_loss(struct ieee80211_vif *vif); 3381 3382/** 3383 * ieee80211_resume_disconnect - disconnect from AP after resume 3384 * 3385 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3386 * 3387 * Instructs mac80211 to disconnect from the AP after resume. 3388 * Drivers can use this after WoWLAN if they know that the 3389 * connection cannot be kept up, for example because keys were 3390 * used while the device was asleep but the replay counters or 3391 * similar cannot be retrieved from the device during resume. 3392 * 3393 * Note that due to implementation issues, if the driver uses 3394 * the reconfiguration functionality during resume the interface 3395 * will still be added as associated first during resume and then 3396 * disconnect normally later. 3397 * 3398 * This function can only be called from the resume callback and 3399 * the driver must not be holding any of its own locks while it 3400 * calls this function, or at least not any locks it needs in the 3401 * key configuration paths (if it supports HW crypto). 3402 */ 3403void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3404 3405/** 3406 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3407 * 3408 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3409 * 3410 * Some hardware require full power save to manage simultaneous BT traffic 3411 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3412 * burst of BT traffic. The hardware gets information of BT traffic via 3413 * hardware co-existence lines, and consequentially requests mac80211 to 3414 * (temporarily) enter full psm. 3415 * This function will only temporarily disable dynamic PS, not enable PSM if 3416 * it was not already enabled. 3417 * The driver must make sure to re-enable dynamic PS using 3418 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3419 * 3420 */ 3421void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3422 3423/** 3424 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3425 * 3426 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3427 * 3428 * This function restores dynamic PS after being temporarily disabled via 3429 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3430 * be coupled with an eventual call to this function. 3431 * 3432 */ 3433void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3434 3435/** 3436 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3437 * rssi threshold triggered 3438 * 3439 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3440 * @rssi_event: the RSSI trigger event type 3441 * @gfp: context flags 3442 * 3443 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3444 * monitoring is configured with an rssi threshold, the driver will inform 3445 * whenever the rssi level reaches the threshold. 3446 */ 3447void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3448 enum nl80211_cqm_rssi_threshold_event rssi_event, 3449 gfp_t gfp); 3450 3451/** 3452 * ieee80211_get_operstate - get the operstate of the vif 3453 * 3454 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3455 * 3456 * The driver might need to know the operstate of the net_device 3457 * (specifically, whether the link is IF_OPER_UP after resume) 3458 */ 3459unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif); 3460 3461/** 3462 * ieee80211_chswitch_done - Complete channel switch process 3463 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3464 * @success: make the channel switch successful or not 3465 * 3466 * Complete the channel switch post-process: set the new operational channel 3467 * and wake up the suspended queues. 3468 */ 3469void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3470 3471/** 3472 * ieee80211_request_smps - request SM PS transition 3473 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3474 * @smps_mode: new SM PS mode 3475 * 3476 * This allows the driver to request an SM PS transition in managed 3477 * mode. This is useful when the driver has more information than 3478 * the stack about possible interference, for example by bluetooth. 3479 */ 3480void ieee80211_request_smps(struct ieee80211_vif *vif, 3481 enum ieee80211_smps_mode smps_mode); 3482 3483/** 3484 * ieee80211_key_removed - disable hw acceleration for key 3485 * @key_conf: The key hw acceleration should be disabled for 3486 * 3487 * This allows drivers to indicate that the given key has been 3488 * removed from hardware acceleration, due to a new key that 3489 * was added. Don't use this if the key can continue to be used 3490 * for TX, if the key restriction is on RX only it is permitted 3491 * to keep the key for TX only and not call this function. 3492 * 3493 * Due to locking constraints, it may only be called during 3494 * @set_key. This function must be allowed to sleep, and the 3495 * key it tries to disable may still be used until it returns. 3496 */ 3497void ieee80211_key_removed(struct ieee80211_key_conf *key_conf); 3498 3499/** 3500 * ieee80211_ready_on_channel - notification of remain-on-channel start 3501 * @hw: pointer as obtained from ieee80211_alloc_hw() 3502 */ 3503void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3504 3505/** 3506 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3507 * @hw: pointer as obtained from ieee80211_alloc_hw() 3508 */ 3509void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3510 3511/** 3512 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3513 * 3514 * in order not to harm the system performance and user experience, the device 3515 * may request not to allow any rx ba session and tear down existing rx ba 3516 * sessions based on system constraints such as periodic BT activity that needs 3517 * to limit wlan activity (eg.sco or a2dp)." 3518 * in such cases, the intention is to limit the duration of the rx ppdu and 3519 * therefore prevent the peer device to use a-mpdu aggregation. 3520 * 3521 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3522 * @ba_rx_bitmap: Bit map of open rx ba per tid 3523 * @addr: & to bssid mac address 3524 */ 3525void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 3526 const u8 *addr); 3527 3528/** 3529 * ieee80211_send_bar - send a BlockAckReq frame 3530 * 3531 * can be used to flush pending frames from the peer's aggregation reorder 3532 * buffer. 3533 * 3534 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3535 * @ra: the peer's destination address 3536 * @tid: the TID of the aggregation session 3537 * @ssn: the new starting sequence number for the receiver 3538 */ 3539void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 3540 3541/* Rate control API */ 3542 3543/** 3544 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 3545 * 3546 * @hw: The hardware the algorithm is invoked for. 3547 * @sband: The band this frame is being transmitted on. 3548 * @bss_conf: the current BSS configuration 3549 * @skb: the skb that will be transmitted, the control information in it needs 3550 * to be filled in 3551 * @reported_rate: The rate control algorithm can fill this in to indicate 3552 * which rate should be reported to userspace as the current rate and 3553 * used for rate calculations in the mesh network. 3554 * @rts: whether RTS will be used for this frame because it is longer than the 3555 * RTS threshold 3556 * @short_preamble: whether mac80211 will request short-preamble transmission 3557 * if the selected rate supports it 3558 * @max_rate_idx: user-requested maximum (legacy) rate 3559 * (deprecated; this will be removed once drivers get updated to use 3560 * rate_idx_mask) 3561 * @rate_idx_mask: user-requested (legacy) rate mask 3562 * @rate_idx_mcs_mask: user-requested MCS rate mask 3563 * @bss: whether this frame is sent out in AP or IBSS mode 3564 */ 3565struct ieee80211_tx_rate_control { 3566 struct ieee80211_hw *hw; 3567 struct ieee80211_supported_band *sband; 3568 struct ieee80211_bss_conf *bss_conf; 3569 struct sk_buff *skb; 3570 struct ieee80211_tx_rate reported_rate; 3571 bool rts, short_preamble; 3572 u8 max_rate_idx; 3573 u32 rate_idx_mask; 3574 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 3575 bool bss; 3576}; 3577 3578struct rate_control_ops { 3579 struct module *module; 3580 const char *name; 3581 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 3582 void (*free)(void *priv); 3583 3584 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 3585 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 3586 struct ieee80211_sta *sta, void *priv_sta); 3587 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 3588 struct ieee80211_sta *sta, void *priv_sta, 3589 u32 changed); 3590 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 3591 void *priv_sta); 3592 3593 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 3594 struct ieee80211_sta *sta, void *priv_sta, 3595 struct sk_buff *skb); 3596 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 3597 struct ieee80211_tx_rate_control *txrc); 3598 3599 void (*add_sta_debugfs)(void *priv, void *priv_sta, 3600 struct dentry *dir); 3601 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 3602}; 3603 3604static inline int rate_supported(struct ieee80211_sta *sta, 3605 enum ieee80211_band band, 3606 int index) 3607{ 3608 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 3609} 3610 3611/** 3612 * rate_control_send_low - helper for drivers for management/no-ack frames 3613 * 3614 * Rate control algorithms that agree to use the lowest rate to 3615 * send management frames and NO_ACK data with the respective hw 3616 * retries should use this in the beginning of their mac80211 get_rate 3617 * callback. If true is returned the rate control can simply return. 3618 * If false is returned we guarantee that sta and sta and priv_sta is 3619 * not null. 3620 * 3621 * Rate control algorithms wishing to do more intelligent selection of 3622 * rate for multicast/broadcast frames may choose to not use this. 3623 * 3624 * @sta: &struct ieee80211_sta pointer to the target destination. Note 3625 * that this may be null. 3626 * @priv_sta: private rate control structure. This may be null. 3627 * @txrc: rate control information we sholud populate for mac80211. 3628 */ 3629bool rate_control_send_low(struct ieee80211_sta *sta, 3630 void *priv_sta, 3631 struct ieee80211_tx_rate_control *txrc); 3632 3633 3634static inline s8 3635rate_lowest_index(struct ieee80211_supported_band *sband, 3636 struct ieee80211_sta *sta) 3637{ 3638 int i; 3639 3640 for (i = 0; i < sband->n_bitrates; i++) 3641 if (rate_supported(sta, sband->band, i)) 3642 return i; 3643 3644 /* warn when we cannot find a rate. */ 3645 WARN_ON_ONCE(1); 3646 3647 /* and return 0 (the lowest index) */ 3648 return 0; 3649} 3650 3651static inline 3652bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 3653 struct ieee80211_sta *sta) 3654{ 3655 unsigned int i; 3656 3657 for (i = 0; i < sband->n_bitrates; i++) 3658 if (rate_supported(sta, sband->band, i)) 3659 return true; 3660 return false; 3661} 3662 3663int ieee80211_rate_control_register(struct rate_control_ops *ops); 3664void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 3665 3666static inline bool 3667conf_is_ht20(struct ieee80211_conf *conf) 3668{ 3669 return conf->channel_type == NL80211_CHAN_HT20; 3670} 3671 3672static inline bool 3673conf_is_ht40_minus(struct ieee80211_conf *conf) 3674{ 3675 return conf->channel_type == NL80211_CHAN_HT40MINUS; 3676} 3677 3678static inline bool 3679conf_is_ht40_plus(struct ieee80211_conf *conf) 3680{ 3681 return conf->channel_type == NL80211_CHAN_HT40PLUS; 3682} 3683 3684static inline bool 3685conf_is_ht40(struct ieee80211_conf *conf) 3686{ 3687 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 3688} 3689 3690static inline bool 3691conf_is_ht(struct ieee80211_conf *conf) 3692{ 3693 return conf->channel_type != NL80211_CHAN_NO_HT; 3694} 3695 3696static inline enum nl80211_iftype 3697ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 3698{ 3699 if (p2p) { 3700 switch (type) { 3701 case NL80211_IFTYPE_STATION: 3702 return NL80211_IFTYPE_P2P_CLIENT; 3703 case NL80211_IFTYPE_AP: 3704 return NL80211_IFTYPE_P2P_GO; 3705 default: 3706 break; 3707 } 3708 } 3709 return type; 3710} 3711 3712static inline enum nl80211_iftype 3713ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 3714{ 3715 return ieee80211_iftype_p2p(vif->type, vif->p2p); 3716} 3717 3718void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 3719 int rssi_min_thold, 3720 int rssi_max_thold); 3721 3722void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 3723 3724int ieee80211_add_srates_ie(struct ieee80211_vif *vif, 3725 struct sk_buff *skb, bool need_basic); 3726 3727int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, 3728 struct sk_buff *skb, bool need_basic); 3729#endif /* MAC80211_H */ 3730