mac80211.h revision 8d77ec856200df31623074de3fde44519df7725b
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 71/** 72 * DOC: mac80211 workqueue 73 * 74 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 75 * The workqueue is a single threaded workqueue and can only be accessed by 76 * helpers for sanity checking. Drivers must ensure all work added onto the 77 * mac80211 workqueue should be cancelled on the driver stop() callback. 78 * 79 * mac80211 will flushed the workqueue upon interface removal and during 80 * suspend. 81 * 82 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 83 * 84 */ 85 86struct device; 87 88/** 89 * enum ieee80211_max_queues - maximum number of queues 90 * 91 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 92 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 93 */ 94enum ieee80211_max_queues { 95 IEEE80211_MAX_QUEUES = 16, 96 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 97}; 98 99#define IEEE80211_INVAL_HW_QUEUE 0xff 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 * @acm: is mandatory admission control required for the access category 128 * @uapsd: is U-APSD mode enabled for the queue 129 */ 130struct ieee80211_tx_queue_params { 131 u16 txop; 132 u16 cw_min; 133 u16 cw_max; 134 u8 aifs; 135 bool acm; 136 bool uapsd; 137}; 138 139struct ieee80211_low_level_stats { 140 unsigned int dot11ACKFailureCount; 141 unsigned int dot11RTSFailureCount; 142 unsigned int dot11FCSErrorCount; 143 unsigned int dot11RTSSuccessCount; 144}; 145 146/** 147 * enum ieee80211_chanctx_change - change flag for channel context 148 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 149 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 150 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 151 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 152 * this is used only with channel switching with CSA 153 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 154 */ 155enum ieee80211_chanctx_change { 156 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 157 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 158 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 159 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 160 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 161}; 162 163/** 164 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 165 * 166 * This is the driver-visible part. The ieee80211_chanctx 167 * that contains it is visible in mac80211 only. 168 * 169 * @def: the channel definition 170 * @min_def: the minimum channel definition currently required. 171 * @rx_chains_static: The number of RX chains that must always be 172 * active on the channel to receive MIMO transmissions 173 * @rx_chains_dynamic: The number of RX chains that must be enabled 174 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 175 * this will always be >= @rx_chains_static. 176 * @radar_enabled: whether radar detection is enabled on this channel. 177 * @drv_priv: data area for driver use, will always be aligned to 178 * sizeof(void *), size is determined in hw information. 179 */ 180struct ieee80211_chanctx_conf { 181 struct cfg80211_chan_def def; 182 struct cfg80211_chan_def min_def; 183 184 u8 rx_chains_static, rx_chains_dynamic; 185 186 bool radar_enabled; 187 188 u8 drv_priv[0] __aligned(sizeof(void *)); 189}; 190 191/** 192 * enum ieee80211_bss_change - BSS change notification flags 193 * 194 * These flags are used with the bss_info_changed() callback 195 * to indicate which BSS parameter changed. 196 * 197 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 198 * also implies a change in the AID. 199 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 200 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 201 * @BSS_CHANGED_ERP_SLOT: slot timing changed 202 * @BSS_CHANGED_HT: 802.11n parameters changed 203 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 204 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 205 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 206 * reason (IBSS and managed mode) 207 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 208 * new beacon (beaconing modes) 209 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 210 * enabled/disabled (beaconing modes) 211 * @BSS_CHANGED_CQM: Connection quality monitor config changed 212 * @BSS_CHANGED_IBSS: IBSS join status changed 213 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 214 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 215 * that it is only ever disabled for station mode. 216 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 217 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 218 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 219 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 220 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 221 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 222 * changed (currently only in P2P client mode, GO mode will be later) 223 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 224 * currently dtim_period only is under consideration. 225 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 226 * note that this is only called when it changes after the channel 227 * context had been assigned. 228 */ 229enum ieee80211_bss_change { 230 BSS_CHANGED_ASSOC = 1<<0, 231 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 232 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 233 BSS_CHANGED_ERP_SLOT = 1<<3, 234 BSS_CHANGED_HT = 1<<4, 235 BSS_CHANGED_BASIC_RATES = 1<<5, 236 BSS_CHANGED_BEACON_INT = 1<<6, 237 BSS_CHANGED_BSSID = 1<<7, 238 BSS_CHANGED_BEACON = 1<<8, 239 BSS_CHANGED_BEACON_ENABLED = 1<<9, 240 BSS_CHANGED_CQM = 1<<10, 241 BSS_CHANGED_IBSS = 1<<11, 242 BSS_CHANGED_ARP_FILTER = 1<<12, 243 BSS_CHANGED_QOS = 1<<13, 244 BSS_CHANGED_IDLE = 1<<14, 245 BSS_CHANGED_SSID = 1<<15, 246 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 247 BSS_CHANGED_PS = 1<<17, 248 BSS_CHANGED_TXPOWER = 1<<18, 249 BSS_CHANGED_P2P_PS = 1<<19, 250 BSS_CHANGED_BEACON_INFO = 1<<20, 251 BSS_CHANGED_BANDWIDTH = 1<<21, 252 253 /* when adding here, make sure to change ieee80211_reconfig */ 254}; 255 256/* 257 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 258 * of addresses for an interface increase beyond this value, hardware ARP 259 * filtering will be disabled. 260 */ 261#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 262 263/** 264 * enum ieee80211_rssi_event - RSSI threshold event 265 * An indicator for when RSSI goes below/above a certain threshold. 266 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 267 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 268 */ 269enum ieee80211_rssi_event { 270 RSSI_EVENT_HIGH, 271 RSSI_EVENT_LOW, 272}; 273 274/** 275 * struct ieee80211_bss_conf - holds the BSS's changing parameters 276 * 277 * This structure keeps information about a BSS (and an association 278 * to that BSS) that can change during the lifetime of the BSS. 279 * 280 * @assoc: association status 281 * @ibss_joined: indicates whether this station is part of an IBSS 282 * or not 283 * @ibss_creator: indicates if a new IBSS network is being created 284 * @aid: association ID number, valid only when @assoc is true 285 * @use_cts_prot: use CTS protection 286 * @use_short_preamble: use 802.11b short preamble; 287 * if the hardware cannot handle this it must set the 288 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 289 * @use_short_slot: use short slot time (only relevant for ERP); 290 * if the hardware cannot handle this it must set the 291 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 292 * @dtim_period: num of beacons before the next DTIM, for beaconing, 293 * valid in station mode only if after the driver was notified 294 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 295 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 296 * as it may have been received during scanning long ago). If the 297 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 298 * only come from a beacon, but might not become valid until after 299 * association when a beacon is received (which is notified with the 300 * %BSS_CHANGED_DTIM flag.) 301 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 302 * the driver/device can use this to calculate synchronisation 303 * (see @sync_tsf) 304 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 305 * is requested, see @sync_tsf/@sync_device_ts. 306 * @beacon_int: beacon interval 307 * @assoc_capability: capabilities taken from assoc resp 308 * @basic_rates: bitmap of basic rates, each bit stands for an 309 * index into the rate table configured by the driver in 310 * the current band. 311 * @beacon_rate: associated AP's beacon TX rate 312 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 313 * @bssid: The BSSID for this BSS 314 * @enable_beacon: whether beaconing should be enabled or not 315 * @chandef: Channel definition for this BSS -- the hardware might be 316 * configured a higher bandwidth than this BSS uses, for example. 317 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 318 * This field is only valid when the channel type is one of the HT types. 319 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 320 * implies disabled 321 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 322 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 323 * may filter ARP queries targeted for other addresses than listed here. 324 * The driver must allow ARP queries targeted for all address listed here 325 * to pass through. An empty list implies no ARP queries need to pass. 326 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 327 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 328 * array size), it's up to the driver what to do in that case. 329 * @qos: This is a QoS-enabled BSS. 330 * @idle: This interface is idle. There's also a global idle flag in the 331 * hardware config which may be more appropriate depending on what 332 * your driver/device needs to do. 333 * @ps: power-save mode (STA only). This flag is NOT affected by 334 * offchannel/dynamic_ps operations. 335 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 336 * @ssid_len: Length of SSID given in @ssid. 337 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 338 * @txpower: TX power in dBm 339 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 340 */ 341struct ieee80211_bss_conf { 342 const u8 *bssid; 343 /* association related data */ 344 bool assoc, ibss_joined; 345 bool ibss_creator; 346 u16 aid; 347 /* erp related data */ 348 bool use_cts_prot; 349 bool use_short_preamble; 350 bool use_short_slot; 351 bool enable_beacon; 352 u8 dtim_period; 353 u16 beacon_int; 354 u16 assoc_capability; 355 u64 sync_tsf; 356 u32 sync_device_ts; 357 u8 sync_dtim_count; 358 u32 basic_rates; 359 struct ieee80211_rate *beacon_rate; 360 int mcast_rate[IEEE80211_NUM_BANDS]; 361 u16 ht_operation_mode; 362 s32 cqm_rssi_thold; 363 u32 cqm_rssi_hyst; 364 struct cfg80211_chan_def chandef; 365 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 366 int arp_addr_cnt; 367 bool qos; 368 bool idle; 369 bool ps; 370 u8 ssid[IEEE80211_MAX_SSID_LEN]; 371 size_t ssid_len; 372 bool hidden_ssid; 373 int txpower; 374 struct ieee80211_p2p_noa_attr p2p_noa_attr; 375}; 376 377/** 378 * enum mac80211_tx_info_flags - flags to describe transmission information/status 379 * 380 * These flags are used with the @flags member of &ieee80211_tx_info. 381 * 382 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 383 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 384 * number to this frame, taking care of not overwriting the fragment 385 * number and increasing the sequence number only when the 386 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 387 * assign sequence numbers to QoS-data frames but cannot do so correctly 388 * for non-QoS-data and management frames because beacons need them from 389 * that counter as well and mac80211 cannot guarantee proper sequencing. 390 * If this flag is set, the driver should instruct the hardware to 391 * assign a sequence number to the frame or assign one itself. Cf. IEEE 392 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 393 * beacons and always be clear for frames without a sequence number field. 394 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 395 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 396 * station 397 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 398 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 399 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 400 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 401 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 402 * because the destination STA was in powersave mode. Note that to 403 * avoid race conditions, the filter must be set by the hardware or 404 * firmware upon receiving a frame that indicates that the station 405 * went to sleep (must be done on device to filter frames already on 406 * the queue) and may only be unset after mac80211 gives the OK for 407 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 408 * since only then is it guaranteed that no more frames are in the 409 * hardware queue. 410 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 411 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 412 * is for the whole aggregation. 413 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 414 * so consider using block ack request (BAR). 415 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 416 * set by rate control algorithms to indicate probe rate, will 417 * be cleared for fragmented frames (except on the last fragment) 418 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 419 * that a frame can be transmitted while the queues are stopped for 420 * off-channel operation. 421 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 422 * used to indicate that a pending frame requires TX processing before 423 * it can be sent out. 424 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 425 * used to indicate that a frame was already retried due to PS 426 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 427 * used to indicate frame should not be encrypted 428 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 429 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 430 * be sent although the station is in powersave mode. 431 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 432 * transmit function after the current frame, this can be used 433 * by drivers to kick the DMA queue only if unset or when the 434 * queue gets full. 435 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 436 * after TX status because the destination was asleep, it must not 437 * be modified again (no seqno assignment, crypto, etc.) 438 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 439 * code for connection establishment, this indicates that its status 440 * should kick the MLME state machine. 441 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 442 * MLME command (internal to mac80211 to figure out whether to send TX 443 * status to user space) 444 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 445 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 446 * frame and selects the maximum number of streams that it can use. 447 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 448 * the off-channel channel when a remain-on-channel offload is done 449 * in hardware -- normal packets still flow and are expected to be 450 * handled properly by the device. 451 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 452 * testing. It will be sent out with incorrect Michael MIC key to allow 453 * TKIP countermeasures to be tested. 454 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 455 * This flag is actually used for management frame especially for P2P 456 * frames not being sent at CCK rate in 2GHz band. 457 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 458 * when its status is reported the service period ends. For frames in 459 * an SP that mac80211 transmits, it is already set; for driver frames 460 * the driver may set this flag. It is also used to do the same for 461 * PS-Poll responses. 462 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 463 * This flag is used to send nullfunc frame at minimum rate when 464 * the nullfunc is used for connection monitoring purpose. 465 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 466 * would be fragmented by size (this is optional, only used for 467 * monitor injection). 468 * @IEEE80211_TX_CTL_PS_RESPONSE: This frame is a response to a poll 469 * frame (PS-Poll or uAPSD). 470 * 471 * Note: If you have to add new flags to the enumeration, then don't 472 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 473 */ 474enum mac80211_tx_info_flags { 475 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 476 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 477 IEEE80211_TX_CTL_NO_ACK = BIT(2), 478 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 479 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 480 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 481 IEEE80211_TX_CTL_AMPDU = BIT(6), 482 IEEE80211_TX_CTL_INJECTED = BIT(7), 483 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 484 IEEE80211_TX_STAT_ACK = BIT(9), 485 IEEE80211_TX_STAT_AMPDU = BIT(10), 486 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 487 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 488 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 489 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 490 IEEE80211_TX_INTFL_RETRIED = BIT(15), 491 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 492 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 493 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 494 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 495 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 496 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 497 IEEE80211_TX_CTL_LDPC = BIT(22), 498 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 499 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 500 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 501 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 502 IEEE80211_TX_STATUS_EOSP = BIT(28), 503 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 504 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 505 IEEE80211_TX_CTL_PS_RESPONSE = BIT(31), 506}; 507 508#define IEEE80211_TX_CTL_STBC_SHIFT 23 509 510/** 511 * enum mac80211_tx_control_flags - flags to describe transmit control 512 * 513 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 514 * protocol frame (e.g. EAP) 515 * 516 * These flags are used in tx_info->control.flags. 517 */ 518enum mac80211_tx_control_flags { 519 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 520}; 521 522/* 523 * This definition is used as a mask to clear all temporary flags, which are 524 * set by the tx handlers for each transmission attempt by the mac80211 stack. 525 */ 526#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 527 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 528 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 529 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 530 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 531 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 532 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 533 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 534 535/** 536 * enum mac80211_rate_control_flags - per-rate flags set by the 537 * Rate Control algorithm. 538 * 539 * These flags are set by the Rate control algorithm for each rate during tx, 540 * in the @flags member of struct ieee80211_tx_rate. 541 * 542 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 543 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 544 * This is set if the current BSS requires ERP protection. 545 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 546 * @IEEE80211_TX_RC_MCS: HT rate. 547 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 548 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 549 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 550 * Greenfield mode. 551 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 552 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 553 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 554 * (80+80 isn't supported yet) 555 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 556 * adjacent 20 MHz channels, if the current channel type is 557 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 558 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 559 */ 560enum mac80211_rate_control_flags { 561 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 562 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 563 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 564 565 /* rate index is an HT/VHT MCS instead of an index */ 566 IEEE80211_TX_RC_MCS = BIT(3), 567 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 568 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 569 IEEE80211_TX_RC_DUP_DATA = BIT(6), 570 IEEE80211_TX_RC_SHORT_GI = BIT(7), 571 IEEE80211_TX_RC_VHT_MCS = BIT(8), 572 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 573 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 574}; 575 576 577/* there are 40 bytes if you don't need the rateset to be kept */ 578#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 579 580/* if you do need the rateset, then you have less space */ 581#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 582 583/* maximum number of rate stages */ 584#define IEEE80211_TX_MAX_RATES 4 585 586/* maximum number of rate table entries */ 587#define IEEE80211_TX_RATE_TABLE_SIZE 4 588 589/** 590 * struct ieee80211_tx_rate - rate selection/status 591 * 592 * @idx: rate index to attempt to send with 593 * @flags: rate control flags (&enum mac80211_rate_control_flags) 594 * @count: number of tries in this rate before going to the next rate 595 * 596 * A value of -1 for @idx indicates an invalid rate and, if used 597 * in an array of retry rates, that no more rates should be tried. 598 * 599 * When used for transmit status reporting, the driver should 600 * always report the rate along with the flags it used. 601 * 602 * &struct ieee80211_tx_info contains an array of these structs 603 * in the control information, and it will be filled by the rate 604 * control algorithm according to what should be sent. For example, 605 * if this array contains, in the format { <idx>, <count> } the 606 * information 607 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 608 * then this means that the frame should be transmitted 609 * up to twice at rate 3, up to twice at rate 2, and up to four 610 * times at rate 1 if it doesn't get acknowledged. Say it gets 611 * acknowledged by the peer after the fifth attempt, the status 612 * information should then contain 613 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 614 * since it was transmitted twice at rate 3, twice at rate 2 615 * and once at rate 1 after which we received an acknowledgement. 616 */ 617struct ieee80211_tx_rate { 618 s8 idx; 619 u16 count:5, 620 flags:11; 621} __packed; 622 623#define IEEE80211_MAX_TX_RETRY 31 624 625static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 626 u8 mcs, u8 nss) 627{ 628 WARN_ON(mcs & ~0xF); 629 WARN_ON((nss - 1) & ~0x7); 630 rate->idx = ((nss - 1) << 4) | mcs; 631} 632 633static inline u8 634ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 635{ 636 return rate->idx & 0xF; 637} 638 639static inline u8 640ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 641{ 642 return (rate->idx >> 4) + 1; 643} 644 645/** 646 * struct ieee80211_tx_info - skb transmit information 647 * 648 * This structure is placed in skb->cb for three uses: 649 * (1) mac80211 TX control - mac80211 tells the driver what to do 650 * (2) driver internal use (if applicable) 651 * (3) TX status information - driver tells mac80211 what happened 652 * 653 * @flags: transmit info flags, defined above 654 * @band: the band to transmit on (use for checking for races) 655 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 656 * @ack_frame_id: internal frame ID for TX status, used internally 657 * @control: union for control data 658 * @status: union for status data 659 * @driver_data: array of driver_data pointers 660 * @ampdu_ack_len: number of acked aggregated frames. 661 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 662 * @ampdu_len: number of aggregated frames. 663 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 664 * @ack_signal: signal strength of the ACK frame 665 */ 666struct ieee80211_tx_info { 667 /* common information */ 668 u32 flags; 669 u8 band; 670 671 u8 hw_queue; 672 673 u16 ack_frame_id; 674 675 union { 676 struct { 677 union { 678 /* rate control */ 679 struct { 680 struct ieee80211_tx_rate rates[ 681 IEEE80211_TX_MAX_RATES]; 682 s8 rts_cts_rate_idx; 683 u8 use_rts:1; 684 u8 use_cts_prot:1; 685 u8 short_preamble:1; 686 u8 skip_table:1; 687 /* 2 bytes free */ 688 }; 689 /* only needed before rate control */ 690 unsigned long jiffies; 691 }; 692 /* NB: vif can be NULL for injected frames */ 693 struct ieee80211_vif *vif; 694 struct ieee80211_key_conf *hw_key; 695 u32 flags; 696 /* 4 bytes free */ 697 } control; 698 struct { 699 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 700 s32 ack_signal; 701 u8 ampdu_ack_len; 702 u8 ampdu_len; 703 u8 antenna; 704 void *status_driver_data[21 / sizeof(void *)]; 705 } status; 706 struct { 707 struct ieee80211_tx_rate driver_rates[ 708 IEEE80211_TX_MAX_RATES]; 709 u8 pad[4]; 710 711 void *rate_driver_data[ 712 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 713 }; 714 void *driver_data[ 715 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 716 }; 717}; 718 719/** 720 * struct ieee80211_sched_scan_ies - scheduled scan IEs 721 * 722 * This structure is used to pass the appropriate IEs to be used in scheduled 723 * scans for all bands. It contains both the IEs passed from the userspace 724 * and the ones generated by mac80211. 725 * 726 * @ie: array with the IEs for each supported band 727 * @len: array with the total length of the IEs for each band 728 */ 729struct ieee80211_sched_scan_ies { 730 u8 *ie[IEEE80211_NUM_BANDS]; 731 size_t len[IEEE80211_NUM_BANDS]; 732}; 733 734static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 735{ 736 return (struct ieee80211_tx_info *)skb->cb; 737} 738 739static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 740{ 741 return (struct ieee80211_rx_status *)skb->cb; 742} 743 744/** 745 * ieee80211_tx_info_clear_status - clear TX status 746 * 747 * @info: The &struct ieee80211_tx_info to be cleared. 748 * 749 * When the driver passes an skb back to mac80211, it must report 750 * a number of things in TX status. This function clears everything 751 * in the TX status but the rate control information (it does clear 752 * the count since you need to fill that in anyway). 753 * 754 * NOTE: You can only use this function if you do NOT use 755 * info->driver_data! Use info->rate_driver_data 756 * instead if you need only the less space that allows. 757 */ 758static inline void 759ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 760{ 761 int i; 762 763 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 764 offsetof(struct ieee80211_tx_info, control.rates)); 765 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 766 offsetof(struct ieee80211_tx_info, driver_rates)); 767 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 768 /* clear the rate counts */ 769 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 770 info->status.rates[i].count = 0; 771 772 BUILD_BUG_ON( 773 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 774 memset(&info->status.ampdu_ack_len, 0, 775 sizeof(struct ieee80211_tx_info) - 776 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 777} 778 779 780/** 781 * enum mac80211_rx_flags - receive flags 782 * 783 * These flags are used with the @flag member of &struct ieee80211_rx_status. 784 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 785 * Use together with %RX_FLAG_MMIC_STRIPPED. 786 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 787 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 788 * verification has been done by the hardware. 789 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 790 * If this flag is set, the stack cannot do any replay detection 791 * hence the driver or hardware will have to do that. 792 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 793 * the frame. 794 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 795 * the frame. 796 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 797 * field) is valid and contains the time the first symbol of the MPDU 798 * was received. This is useful in monitor mode and for proper IBSS 799 * merging. 800 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 801 * field) is valid and contains the time the last symbol of the MPDU 802 * (including FCS) was received. 803 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 804 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 805 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 806 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 807 * @RX_FLAG_SHORT_GI: Short guard interval was used 808 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 809 * Valid only for data frames (mainly A-MPDU) 810 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 811 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 812 * to hw.radiotap_mcs_details to advertise that fact 813 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 814 * number (@ampdu_reference) must be populated and be a distinct number for 815 * each A-MPDU 816 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 817 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 818 * monitoring purposes only 819 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 820 * subframes of a single A-MPDU 821 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 822 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 823 * on this subframe 824 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 825 * is stored in the @ampdu_delimiter_crc field) 826 * @RX_FLAG_LDPC: LDPC was used 827 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 828 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 829 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 830 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 831 * subframes instead of a one huge frame for performance reasons. 832 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 833 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 834 * the 3rd (last) one must not have this flag set. The flag is used to 835 * deal with retransmission/duplication recovery properly since A-MSDU 836 * subframes share the same sequence number. Reported subframes can be 837 * either regular MSDU or singly A-MSDUs. Subframes must not be 838 * interleaved with other frames. 839 */ 840enum mac80211_rx_flags { 841 RX_FLAG_MMIC_ERROR = BIT(0), 842 RX_FLAG_DECRYPTED = BIT(1), 843 RX_FLAG_MMIC_STRIPPED = BIT(3), 844 RX_FLAG_IV_STRIPPED = BIT(4), 845 RX_FLAG_FAILED_FCS_CRC = BIT(5), 846 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 847 RX_FLAG_MACTIME_START = BIT(7), 848 RX_FLAG_SHORTPRE = BIT(8), 849 RX_FLAG_HT = BIT(9), 850 RX_FLAG_40MHZ = BIT(10), 851 RX_FLAG_SHORT_GI = BIT(11), 852 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 853 RX_FLAG_HT_GF = BIT(13), 854 RX_FLAG_AMPDU_DETAILS = BIT(14), 855 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 856 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 857 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 858 RX_FLAG_AMPDU_IS_LAST = BIT(18), 859 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 860 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 861 RX_FLAG_MACTIME_END = BIT(21), 862 RX_FLAG_VHT = BIT(22), 863 RX_FLAG_LDPC = BIT(23), 864 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 865 RX_FLAG_10MHZ = BIT(28), 866 RX_FLAG_5MHZ = BIT(29), 867 RX_FLAG_AMSDU_MORE = BIT(30), 868}; 869 870#define RX_FLAG_STBC_SHIFT 26 871 872/** 873 * enum mac80211_rx_vht_flags - receive VHT flags 874 * 875 * These flags are used with the @vht_flag member of 876 * &struct ieee80211_rx_status. 877 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 878 * @RX_VHT_FLAG_80P80MHZ: 80+80 MHz was used 879 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 880 * @RX_VHT_FLAG_BF: packet was beamformed 881 */ 882enum mac80211_rx_vht_flags { 883 RX_VHT_FLAG_80MHZ = BIT(0), 884 RX_VHT_FLAG_80P80MHZ = BIT(1), 885 RX_VHT_FLAG_160MHZ = BIT(2), 886 RX_VHT_FLAG_BF = BIT(3), 887}; 888 889/** 890 * struct ieee80211_rx_status - receive status 891 * 892 * The low-level driver should provide this information (the subset 893 * supported by hardware) to the 802.11 code with each received 894 * frame, in the skb's control buffer (cb). 895 * 896 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 897 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 898 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 899 * it but can store it and pass it back to the driver for synchronisation 900 * @band: the active band when this frame was received 901 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 902 * @signal: signal strength when receiving this frame, either in dBm, in dB or 903 * unspecified depending on the hardware capabilities flags 904 * @IEEE80211_HW_SIGNAL_* 905 * @chains: bitmask of receive chains for which separate signal strength 906 * values were filled. 907 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 908 * support dB or unspecified units) 909 * @antenna: antenna used 910 * @rate_idx: index of data rate into band's supported rates or MCS index if 911 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 912 * @vht_nss: number of streams (VHT only) 913 * @flag: %RX_FLAG_* 914 * @vht_flag: %RX_VHT_FLAG_* 915 * @rx_flags: internal RX flags for mac80211 916 * @ampdu_reference: A-MPDU reference number, must be a different value for 917 * each A-MPDU but the same for each subframe within one A-MPDU 918 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 919 */ 920struct ieee80211_rx_status { 921 u64 mactime; 922 u32 device_timestamp; 923 u32 ampdu_reference; 924 u32 flag; 925 u16 freq; 926 u8 vht_flag; 927 u8 rate_idx; 928 u8 vht_nss; 929 u8 rx_flags; 930 u8 band; 931 u8 antenna; 932 s8 signal; 933 u8 chains; 934 s8 chain_signal[IEEE80211_MAX_CHAINS]; 935 u8 ampdu_delimiter_crc; 936}; 937 938/** 939 * enum ieee80211_conf_flags - configuration flags 940 * 941 * Flags to define PHY configuration options 942 * 943 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 944 * to determine for example whether to calculate timestamps for packets 945 * or not, do not use instead of filter flags! 946 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 947 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 948 * meaning that the hardware still wakes up for beacons, is able to 949 * transmit frames and receive the possible acknowledgment frames. 950 * Not to be confused with hardware specific wakeup/sleep states, 951 * driver is responsible for that. See the section "Powersave support" 952 * for more. 953 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 954 * the driver should be prepared to handle configuration requests but 955 * may turn the device off as much as possible. Typically, this flag will 956 * be set when an interface is set UP but not associated or scanning, but 957 * it can also be unset in that case when monitor interfaces are active. 958 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 959 * operating channel. 960 */ 961enum ieee80211_conf_flags { 962 IEEE80211_CONF_MONITOR = (1<<0), 963 IEEE80211_CONF_PS = (1<<1), 964 IEEE80211_CONF_IDLE = (1<<2), 965 IEEE80211_CONF_OFFCHANNEL = (1<<3), 966}; 967 968 969/** 970 * enum ieee80211_conf_changed - denotes which configuration changed 971 * 972 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 973 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 974 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 975 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 976 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 977 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 978 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 979 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 980 * Note that this is only valid if channel contexts are not used, 981 * otherwise each channel context has the number of chains listed. 982 */ 983enum ieee80211_conf_changed { 984 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 985 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 986 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 987 IEEE80211_CONF_CHANGE_PS = BIT(4), 988 IEEE80211_CONF_CHANGE_POWER = BIT(5), 989 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 990 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 991 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 992}; 993 994/** 995 * enum ieee80211_smps_mode - spatial multiplexing power save mode 996 * 997 * @IEEE80211_SMPS_AUTOMATIC: automatic 998 * @IEEE80211_SMPS_OFF: off 999 * @IEEE80211_SMPS_STATIC: static 1000 * @IEEE80211_SMPS_DYNAMIC: dynamic 1001 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1002 */ 1003enum ieee80211_smps_mode { 1004 IEEE80211_SMPS_AUTOMATIC, 1005 IEEE80211_SMPS_OFF, 1006 IEEE80211_SMPS_STATIC, 1007 IEEE80211_SMPS_DYNAMIC, 1008 1009 /* keep last */ 1010 IEEE80211_SMPS_NUM_MODES, 1011}; 1012 1013/** 1014 * struct ieee80211_conf - configuration of the device 1015 * 1016 * This struct indicates how the driver shall configure the hardware. 1017 * 1018 * @flags: configuration flags defined above 1019 * 1020 * @listen_interval: listen interval in units of beacon interval 1021 * @max_sleep_period: the maximum number of beacon intervals to sleep for 1022 * before checking the beacon for a TIM bit (managed mode only); this 1023 * value will be only achievable between DTIM frames, the hardware 1024 * needs to check for the multicast traffic bit in DTIM beacons. 1025 * This variable is valid only when the CONF_PS flag is set. 1026 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1027 * in power saving. Power saving will not be enabled until a beacon 1028 * has been received and the DTIM period is known. 1029 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1030 * powersave documentation below. This variable is valid only when 1031 * the CONF_PS flag is set. 1032 * 1033 * @power_level: requested transmit power (in dBm), backward compatibility 1034 * value only that is set to the minimum of all interfaces 1035 * 1036 * @chandef: the channel definition to tune to 1037 * @radar_enabled: whether radar detection is enabled 1038 * 1039 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1040 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1041 * but actually means the number of transmissions not the number of retries 1042 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1043 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1044 * number of transmissions not the number of retries 1045 * 1046 * @smps_mode: spatial multiplexing powersave mode; note that 1047 * %IEEE80211_SMPS_STATIC is used when the device is not 1048 * configured for an HT channel. 1049 * Note that this is only valid if channel contexts are not used, 1050 * otherwise each channel context has the number of chains listed. 1051 */ 1052struct ieee80211_conf { 1053 u32 flags; 1054 int power_level, dynamic_ps_timeout; 1055 int max_sleep_period; 1056 1057 u16 listen_interval; 1058 u8 ps_dtim_period; 1059 1060 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1061 1062 struct cfg80211_chan_def chandef; 1063 bool radar_enabled; 1064 enum ieee80211_smps_mode smps_mode; 1065}; 1066 1067/** 1068 * struct ieee80211_channel_switch - holds the channel switch data 1069 * 1070 * The information provided in this structure is required for channel switch 1071 * operation. 1072 * 1073 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1074 * Function (TSF) timer when the frame containing the channel switch 1075 * announcement was received. This is simply the rx.mactime parameter 1076 * the driver passed into mac80211. 1077 * @block_tx: Indicates whether transmission must be blocked before the 1078 * scheduled channel switch, as indicated by the AP. 1079 * @chandef: the new channel to switch to 1080 * @count: the number of TBTT's until the channel switch event 1081 */ 1082struct ieee80211_channel_switch { 1083 u64 timestamp; 1084 bool block_tx; 1085 struct cfg80211_chan_def chandef; 1086 u8 count; 1087}; 1088 1089/** 1090 * enum ieee80211_vif_flags - virtual interface flags 1091 * 1092 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1093 * on this virtual interface to avoid unnecessary CPU wakeups 1094 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1095 * monitoring on this virtual interface -- i.e. it can monitor 1096 * connection quality related parameters, such as the RSSI level and 1097 * provide notifications if configured trigger levels are reached. 1098 */ 1099enum ieee80211_vif_flags { 1100 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1101 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1102}; 1103 1104/** 1105 * struct ieee80211_vif - per-interface data 1106 * 1107 * Data in this structure is continually present for driver 1108 * use during the life of a virtual interface. 1109 * 1110 * @type: type of this virtual interface 1111 * @bss_conf: BSS configuration for this interface, either our own 1112 * or the BSS we're associated to 1113 * @addr: address of this interface 1114 * @p2p: indicates whether this AP or STA interface is a p2p 1115 * interface, i.e. a GO or p2p-sta respectively 1116 * @csa_active: marks whether a channel switch is going on. Internally it is 1117 * write-protected by sdata_lock and local->mtx so holding either is fine 1118 * for read access. 1119 * @driver_flags: flags/capabilities the driver has for this interface, 1120 * these need to be set (or cleared) when the interface is added 1121 * or, if supported by the driver, the interface type is changed 1122 * at runtime, mac80211 will never touch this field 1123 * @hw_queue: hardware queue for each AC 1124 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1125 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1126 * when it is not assigned. This pointer is RCU-protected due to the TX 1127 * path needing to access it; even though the netdev carrier will always 1128 * be off when it is %NULL there can still be races and packets could be 1129 * processed after it switches back to %NULL. 1130 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1131 * interface debug files. Note that it will be NULL for the virtual 1132 * monitor interface (if that is requested.) 1133 * @drv_priv: data area for driver use, will always be aligned to 1134 * sizeof(void *). 1135 */ 1136struct ieee80211_vif { 1137 enum nl80211_iftype type; 1138 struct ieee80211_bss_conf bss_conf; 1139 u8 addr[ETH_ALEN]; 1140 bool p2p; 1141 bool csa_active; 1142 1143 u8 cab_queue; 1144 u8 hw_queue[IEEE80211_NUM_ACS]; 1145 1146 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1147 1148 u32 driver_flags; 1149 1150#ifdef CONFIG_MAC80211_DEBUGFS 1151 struct dentry *debugfs_dir; 1152#endif 1153 1154 /* must be last */ 1155 u8 drv_priv[0] __aligned(sizeof(void *)); 1156}; 1157 1158static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1159{ 1160#ifdef CONFIG_MAC80211_MESH 1161 return vif->type == NL80211_IFTYPE_MESH_POINT; 1162#endif 1163 return false; 1164} 1165 1166/** 1167 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1168 * @wdev: the wdev to get the vif for 1169 * 1170 * This can be used by mac80211 drivers with direct cfg80211 APIs 1171 * (like the vendor commands) that get a wdev. 1172 * 1173 * Note that this function may return %NULL if the given wdev isn't 1174 * associated with a vif that the driver knows about (e.g. monitor 1175 * or AP_VLAN interfaces.) 1176 */ 1177struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1178 1179/** 1180 * enum ieee80211_key_flags - key flags 1181 * 1182 * These flags are used for communication about keys between the driver 1183 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1184 * 1185 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1186 * driver to indicate that it requires IV generation for this 1187 * particular key. 1188 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1189 * the driver for a TKIP key if it requires Michael MIC 1190 * generation in software. 1191 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1192 * that the key is pairwise rather then a shared key. 1193 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1194 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1195 * be done in software. 1196 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1197 * if space should be prepared for the IV, but the IV 1198 * itself should not be generated. Do not set together with 1199 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1200 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1201 * management frames. The flag can help drivers that have a hardware 1202 * crypto implementation that doesn't deal with management frames 1203 * properly by allowing them to not upload the keys to hardware and 1204 * fall back to software crypto. Note that this flag deals only with 1205 * RX, if your crypto engine can't deal with TX you can also set the 1206 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1207 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the 1208 * driver for a CCMP key to indicate that is requires IV generation 1209 * only for managment frames (MFP). 1210 */ 1211enum ieee80211_key_flags { 1212 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), 1213 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), 1214 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), 1215 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), 1216 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), 1217 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), 1218 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), 1219}; 1220 1221/** 1222 * struct ieee80211_key_conf - key information 1223 * 1224 * This key information is given by mac80211 to the driver by 1225 * the set_key() callback in &struct ieee80211_ops. 1226 * 1227 * @hw_key_idx: To be set by the driver, this is the key index the driver 1228 * wants to be given when a frame is transmitted and needs to be 1229 * encrypted in hardware. 1230 * @cipher: The key's cipher suite selector. 1231 * @flags: key flags, see &enum ieee80211_key_flags. 1232 * @keyidx: the key index (0-3) 1233 * @keylen: key material length 1234 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1235 * data block: 1236 * - Temporal Encryption Key (128 bits) 1237 * - Temporal Authenticator Tx MIC Key (64 bits) 1238 * - Temporal Authenticator Rx MIC Key (64 bits) 1239 * @icv_len: The ICV length for this key type 1240 * @iv_len: The IV length for this key type 1241 */ 1242struct ieee80211_key_conf { 1243 u32 cipher; 1244 u8 icv_len; 1245 u8 iv_len; 1246 u8 hw_key_idx; 1247 u8 flags; 1248 s8 keyidx; 1249 u8 keylen; 1250 u8 key[0]; 1251}; 1252 1253/** 1254 * struct ieee80211_cipher_scheme - cipher scheme 1255 * 1256 * This structure contains a cipher scheme information defining 1257 * the secure packet crypto handling. 1258 * 1259 * @cipher: a cipher suite selector 1260 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1261 * @hdr_len: a length of a security header used the cipher 1262 * @pn_len: a length of a packet number in the security header 1263 * @pn_off: an offset of pn from the beginning of the security header 1264 * @key_idx_off: an offset of key index byte in the security header 1265 * @key_idx_mask: a bit mask of key_idx bits 1266 * @key_idx_shift: a bit shift needed to get key_idx 1267 * key_idx value calculation: 1268 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1269 * @mic_len: a mic length in bytes 1270 */ 1271struct ieee80211_cipher_scheme { 1272 u32 cipher; 1273 u16 iftype; 1274 u8 hdr_len; 1275 u8 pn_len; 1276 u8 pn_off; 1277 u8 key_idx_off; 1278 u8 key_idx_mask; 1279 u8 key_idx_shift; 1280 u8 mic_len; 1281}; 1282 1283/** 1284 * enum set_key_cmd - key command 1285 * 1286 * Used with the set_key() callback in &struct ieee80211_ops, this 1287 * indicates whether a key is being removed or added. 1288 * 1289 * @SET_KEY: a key is set 1290 * @DISABLE_KEY: a key must be disabled 1291 */ 1292enum set_key_cmd { 1293 SET_KEY, DISABLE_KEY, 1294}; 1295 1296/** 1297 * enum ieee80211_sta_state - station state 1298 * 1299 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1300 * this is a special state for add/remove transitions 1301 * @IEEE80211_STA_NONE: station exists without special state 1302 * @IEEE80211_STA_AUTH: station is authenticated 1303 * @IEEE80211_STA_ASSOC: station is associated 1304 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1305 */ 1306enum ieee80211_sta_state { 1307 /* NOTE: These need to be ordered correctly! */ 1308 IEEE80211_STA_NOTEXIST, 1309 IEEE80211_STA_NONE, 1310 IEEE80211_STA_AUTH, 1311 IEEE80211_STA_ASSOC, 1312 IEEE80211_STA_AUTHORIZED, 1313}; 1314 1315/** 1316 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1317 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1318 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1319 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1320 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1321 * (including 80+80 MHz) 1322 * 1323 * Implementation note: 20 must be zero to be initialized 1324 * correctly, the values must be sorted. 1325 */ 1326enum ieee80211_sta_rx_bandwidth { 1327 IEEE80211_STA_RX_BW_20 = 0, 1328 IEEE80211_STA_RX_BW_40, 1329 IEEE80211_STA_RX_BW_80, 1330 IEEE80211_STA_RX_BW_160, 1331}; 1332 1333/** 1334 * struct ieee80211_sta_rates - station rate selection table 1335 * 1336 * @rcu_head: RCU head used for freeing the table on update 1337 * @rate: transmit rates/flags to be used by default. 1338 * Overriding entries per-packet is possible by using cb tx control. 1339 */ 1340struct ieee80211_sta_rates { 1341 struct rcu_head rcu_head; 1342 struct { 1343 s8 idx; 1344 u8 count; 1345 u8 count_cts; 1346 u8 count_rts; 1347 u16 flags; 1348 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1349}; 1350 1351/** 1352 * struct ieee80211_sta - station table entry 1353 * 1354 * A station table entry represents a station we are possibly 1355 * communicating with. Since stations are RCU-managed in 1356 * mac80211, any ieee80211_sta pointer you get access to must 1357 * either be protected by rcu_read_lock() explicitly or implicitly, 1358 * or you must take good care to not use such a pointer after a 1359 * call to your sta_remove callback that removed it. 1360 * 1361 * @addr: MAC address 1362 * @aid: AID we assigned to the station if we're an AP 1363 * @supp_rates: Bitmap of supported rates (per band) 1364 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1365 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1366 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1367 * @drv_priv: data area for driver use, will always be aligned to 1368 * sizeof(void *), size is determined in hw information. 1369 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1370 * if wme is supported. 1371 * @max_sp: max Service Period. Only valid if wme is supported. 1372 * @bandwidth: current bandwidth the station can receive with 1373 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1374 * station can receive at the moment, changed by operating mode 1375 * notifications and capabilities. The value is only valid after 1376 * the station moves to associated state. 1377 * @smps_mode: current SMPS mode (off, static or dynamic) 1378 * @rates: rate control selection table 1379 * @tdls: indicates whether the STA is a TDLS peer 1380 */ 1381struct ieee80211_sta { 1382 u32 supp_rates[IEEE80211_NUM_BANDS]; 1383 u8 addr[ETH_ALEN]; 1384 u16 aid; 1385 struct ieee80211_sta_ht_cap ht_cap; 1386 struct ieee80211_sta_vht_cap vht_cap; 1387 bool wme; 1388 u8 uapsd_queues; 1389 u8 max_sp; 1390 u8 rx_nss; 1391 enum ieee80211_sta_rx_bandwidth bandwidth; 1392 enum ieee80211_smps_mode smps_mode; 1393 struct ieee80211_sta_rates __rcu *rates; 1394 bool tdls; 1395 1396 /* must be last */ 1397 u8 drv_priv[0] __aligned(sizeof(void *)); 1398}; 1399 1400/** 1401 * enum sta_notify_cmd - sta notify command 1402 * 1403 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1404 * indicates if an associated station made a power state transition. 1405 * 1406 * @STA_NOTIFY_SLEEP: a station is now sleeping 1407 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1408 */ 1409enum sta_notify_cmd { 1410 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1411}; 1412 1413/** 1414 * struct ieee80211_tx_control - TX control data 1415 * 1416 * @sta: station table entry, this sta pointer may be NULL and 1417 * it is not allowed to copy the pointer, due to RCU. 1418 */ 1419struct ieee80211_tx_control { 1420 struct ieee80211_sta *sta; 1421}; 1422 1423/** 1424 * enum ieee80211_hw_flags - hardware flags 1425 * 1426 * These flags are used to indicate hardware capabilities to 1427 * the stack. Generally, flags here should have their meaning 1428 * done in a way that the simplest hardware doesn't need setting 1429 * any particular flags. There are some exceptions to this rule, 1430 * however, so you are advised to review these flags carefully. 1431 * 1432 * @IEEE80211_HW_HAS_RATE_CONTROL: 1433 * The hardware or firmware includes rate control, and cannot be 1434 * controlled by the stack. As such, no rate control algorithm 1435 * should be instantiated, and the TX rate reported to userspace 1436 * will be taken from the TX status instead of the rate control 1437 * algorithm. 1438 * Note that this requires that the driver implement a number of 1439 * callbacks so it has the correct information, it needs to have 1440 * the @set_rts_threshold callback and must look at the BSS config 1441 * @use_cts_prot for G/N protection, @use_short_slot for slot 1442 * timing in 2.4 GHz and @use_short_preamble for preambles for 1443 * CCK frames. 1444 * 1445 * @IEEE80211_HW_RX_INCLUDES_FCS: 1446 * Indicates that received frames passed to the stack include 1447 * the FCS at the end. 1448 * 1449 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1450 * Some wireless LAN chipsets buffer broadcast/multicast frames 1451 * for power saving stations in the hardware/firmware and others 1452 * rely on the host system for such buffering. This option is used 1453 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1454 * multicast frames when there are power saving stations so that 1455 * the driver can fetch them with ieee80211_get_buffered_bc(). 1456 * 1457 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1458 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1459 * 1460 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1461 * Hardware is not capable of receiving frames with short preamble on 1462 * the 2.4 GHz band. 1463 * 1464 * @IEEE80211_HW_SIGNAL_UNSPEC: 1465 * Hardware can provide signal values but we don't know its units. We 1466 * expect values between 0 and @max_signal. 1467 * If possible please provide dB or dBm instead. 1468 * 1469 * @IEEE80211_HW_SIGNAL_DBM: 1470 * Hardware gives signal values in dBm, decibel difference from 1471 * one milliwatt. This is the preferred method since it is standardized 1472 * between different devices. @max_signal does not need to be set. 1473 * 1474 * @IEEE80211_HW_SPECTRUM_MGMT: 1475 * Hardware supports spectrum management defined in 802.11h 1476 * Measurement, Channel Switch, Quieting, TPC 1477 * 1478 * @IEEE80211_HW_AMPDU_AGGREGATION: 1479 * Hardware supports 11n A-MPDU aggregation. 1480 * 1481 * @IEEE80211_HW_SUPPORTS_PS: 1482 * Hardware has power save support (i.e. can go to sleep). 1483 * 1484 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1485 * Hardware requires nullfunc frame handling in stack, implies 1486 * stack support for dynamic PS. 1487 * 1488 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1489 * Hardware has support for dynamic PS. 1490 * 1491 * @IEEE80211_HW_MFP_CAPABLE: 1492 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1493 * 1494 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1495 * Hardware supports static spatial multiplexing powersave, 1496 * ie. can turn off all but one chain even on HT connections 1497 * that should be using more chains. 1498 * 1499 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1500 * Hardware supports dynamic spatial multiplexing powersave, 1501 * ie. can turn off all but one chain and then wake the rest 1502 * up as required after, for example, rts/cts handshake. 1503 * 1504 * @IEEE80211_HW_SUPPORTS_UAPSD: 1505 * Hardware supports Unscheduled Automatic Power Save Delivery 1506 * (U-APSD) in managed mode. The mode is configured with 1507 * conf_tx() operation. 1508 * 1509 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1510 * Hardware can provide ack status reports of Tx frames to 1511 * the stack. 1512 * 1513 * @IEEE80211_HW_CONNECTION_MONITOR: 1514 * The hardware performs its own connection monitoring, including 1515 * periodic keep-alives to the AP and probing the AP on beacon loss. 1516 * 1517 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1518 * This device needs to get data from beacon before association (i.e. 1519 * dtim_period). 1520 * 1521 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1522 * per-station GTKs as used by IBSS RSN or during fast transition. If 1523 * the device doesn't support per-station GTKs, but can be asked not 1524 * to decrypt group addressed frames, then IBSS RSN support is still 1525 * possible but software crypto will be used. Advertise the wiphy flag 1526 * only in that case. 1527 * 1528 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1529 * autonomously manages the PS status of connected stations. When 1530 * this flag is set mac80211 will not trigger PS mode for connected 1531 * stations based on the PM bit of incoming frames. 1532 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1533 * the PS mode of connected stations. 1534 * 1535 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1536 * setup strictly in HW. mac80211 should not attempt to do this in 1537 * software. 1538 * 1539 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1540 * a virtual monitor interface when monitor interfaces are the only 1541 * active interfaces. 1542 * 1543 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1544 * queue mapping in order to use different queues (not just one per AC) 1545 * for different virtual interfaces. See the doc section on HW queue 1546 * control for more details. 1547 * 1548 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1549 * selection table provided by the rate control algorithm. 1550 * 1551 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1552 * P2P Interface. This will be honoured even if more than one interface 1553 * is supported. 1554 * 1555 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1556 * only, to allow getting TBTT of a DTIM beacon. 1557 * 1558 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1559 * and can cope with CCK rates in an aggregation session (e.g. by not 1560 * using aggregation for such frames.) 1561 * 1562 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1563 * for a single active channel while using channel contexts. When support 1564 * is not enabled the default action is to disconnect when getting the 1565 * CSA frame. 1566 * 1567 * @IEEE80211_HW_CHANGE_RUNNING_CHANCTX: The hardware can change a 1568 * channel context on-the-fly. This is needed for channel switch 1569 * on single-channel hardware. It can also be used as an 1570 * optimization in certain channel switch cases with 1571 * multi-channel. 1572 */ 1573enum ieee80211_hw_flags { 1574 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1575 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1576 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1577 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1578 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1579 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1580 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1581 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1582 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1583 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1584 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1585 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1586 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1587 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1588 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1589 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1590 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1591 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1592 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1593 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1594 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1595 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1596 IEEE80211_HW_AP_LINK_PS = 1<<22, 1597 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1598 IEEE80211_HW_SUPPORTS_RC_TABLE = 1<<24, 1599 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1600 IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, 1601 IEEE80211_HW_SUPPORTS_HT_CCK_RATES = 1<<27, 1602 IEEE80211_HW_CHANCTX_STA_CSA = 1<<28, 1603 IEEE80211_HW_CHANGE_RUNNING_CHANCTX = 1<<29, 1604}; 1605 1606/** 1607 * struct ieee80211_hw - hardware information and state 1608 * 1609 * This structure contains the configuration and hardware 1610 * information for an 802.11 PHY. 1611 * 1612 * @wiphy: This points to the &struct wiphy allocated for this 1613 * 802.11 PHY. You must fill in the @perm_addr and @dev 1614 * members of this structure using SET_IEEE80211_DEV() 1615 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1616 * bands (with channels, bitrates) are registered here. 1617 * 1618 * @conf: &struct ieee80211_conf, device configuration, don't use. 1619 * 1620 * @priv: pointer to private area that was allocated for driver use 1621 * along with this structure. 1622 * 1623 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1624 * 1625 * @extra_tx_headroom: headroom to reserve in each transmit skb 1626 * for use by the driver (e.g. for transmit headers.) 1627 * 1628 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 1629 * Can be used by drivers to add extra IEs. 1630 * 1631 * @max_signal: Maximum value for signal (rssi) in RX information, used 1632 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1633 * 1634 * @max_listen_interval: max listen interval in units of beacon interval 1635 * that HW supports 1636 * 1637 * @queues: number of available hardware transmit queues for 1638 * data packets. WMM/QoS requires at least four, these 1639 * queues need to have configurable access parameters. 1640 * 1641 * @rate_control_algorithm: rate control algorithm for this hardware. 1642 * If unset (NULL), the default algorithm will be used. Must be 1643 * set before calling ieee80211_register_hw(). 1644 * 1645 * @vif_data_size: size (in bytes) of the drv_priv data area 1646 * within &struct ieee80211_vif. 1647 * @sta_data_size: size (in bytes) of the drv_priv data area 1648 * within &struct ieee80211_sta. 1649 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1650 * within &struct ieee80211_chanctx_conf. 1651 * 1652 * @max_rates: maximum number of alternate rate retry stages the hw 1653 * can handle. 1654 * @max_report_rates: maximum number of alternate rate retry stages 1655 * the hw can report back. 1656 * @max_rate_tries: maximum number of tries for each stage 1657 * 1658 * @max_rx_aggregation_subframes: maximum buffer size (number of 1659 * sub-frames) to be used for A-MPDU block ack receiver 1660 * aggregation. 1661 * This is only relevant if the device has restrictions on the 1662 * number of subframes, if it relies on mac80211 to do reordering 1663 * it shouldn't be set. 1664 * 1665 * @max_tx_aggregation_subframes: maximum number of subframes in an 1666 * aggregate an HT driver will transmit, used by the peer as a 1667 * hint to size its reorder buffer. 1668 * 1669 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1670 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1671 * 1672 * @radiotap_mcs_details: lists which MCS information can the HW 1673 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1674 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1675 * adding _BW is supported today. 1676 * 1677 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1678 * the default is _GI | _BANDWIDTH. 1679 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1680 * 1681 * @netdev_features: netdev features to be set in each netdev created 1682 * from this HW. Note only HW checksum features are currently 1683 * compatible with mac80211. Other feature bits will be rejected. 1684 * 1685 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 1686 * for each access category if it is uAPSD trigger-enabled and delivery- 1687 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 1688 * Each bit corresponds to different AC. Value '1' in specific bit means 1689 * that corresponding AC is both trigger- and delivery-enabled. '0' means 1690 * neither enabled. 1691 * 1692 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 1693 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 1694 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 1695 * 1696 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 1697 * @cipher_schemes: a pointer to an array of cipher scheme definitions 1698 * supported by HW. 1699 */ 1700struct ieee80211_hw { 1701 struct ieee80211_conf conf; 1702 struct wiphy *wiphy; 1703 const char *rate_control_algorithm; 1704 void *priv; 1705 u32 flags; 1706 unsigned int extra_tx_headroom; 1707 unsigned int extra_beacon_tailroom; 1708 int vif_data_size; 1709 int sta_data_size; 1710 int chanctx_data_size; 1711 u16 queues; 1712 u16 max_listen_interval; 1713 s8 max_signal; 1714 u8 max_rates; 1715 u8 max_report_rates; 1716 u8 max_rate_tries; 1717 u8 max_rx_aggregation_subframes; 1718 u8 max_tx_aggregation_subframes; 1719 u8 offchannel_tx_hw_queue; 1720 u8 radiotap_mcs_details; 1721 u16 radiotap_vht_details; 1722 netdev_features_t netdev_features; 1723 u8 uapsd_queues; 1724 u8 uapsd_max_sp_len; 1725 u8 n_cipher_schemes; 1726 const struct ieee80211_cipher_scheme *cipher_schemes; 1727}; 1728 1729/** 1730 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1731 * 1732 * @wiphy: the &struct wiphy which we want to query 1733 * 1734 * mac80211 drivers can use this to get to their respective 1735 * &struct ieee80211_hw. Drivers wishing to get to their own private 1736 * structure can then access it via hw->priv. Note that mac802111 drivers should 1737 * not use wiphy_priv() to try to get their private driver structure as this 1738 * is already used internally by mac80211. 1739 * 1740 * Return: The mac80211 driver hw struct of @wiphy. 1741 */ 1742struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1743 1744/** 1745 * SET_IEEE80211_DEV - set device for 802.11 hardware 1746 * 1747 * @hw: the &struct ieee80211_hw to set the device for 1748 * @dev: the &struct device of this 802.11 device 1749 */ 1750static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1751{ 1752 set_wiphy_dev(hw->wiphy, dev); 1753} 1754 1755/** 1756 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1757 * 1758 * @hw: the &struct ieee80211_hw to set the MAC address for 1759 * @addr: the address to set 1760 */ 1761static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1762{ 1763 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1764} 1765 1766static inline struct ieee80211_rate * 1767ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1768 const struct ieee80211_tx_info *c) 1769{ 1770 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1771 return NULL; 1772 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1773} 1774 1775static inline struct ieee80211_rate * 1776ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1777 const struct ieee80211_tx_info *c) 1778{ 1779 if (c->control.rts_cts_rate_idx < 0) 1780 return NULL; 1781 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1782} 1783 1784static inline struct ieee80211_rate * 1785ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1786 const struct ieee80211_tx_info *c, int idx) 1787{ 1788 if (c->control.rates[idx + 1].idx < 0) 1789 return NULL; 1790 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1791} 1792 1793/** 1794 * ieee80211_free_txskb - free TX skb 1795 * @hw: the hardware 1796 * @skb: the skb 1797 * 1798 * Free a transmit skb. Use this funtion when some failure 1799 * to transmit happened and thus status cannot be reported. 1800 */ 1801void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1802 1803/** 1804 * DOC: Hardware crypto acceleration 1805 * 1806 * mac80211 is capable of taking advantage of many hardware 1807 * acceleration designs for encryption and decryption operations. 1808 * 1809 * The set_key() callback in the &struct ieee80211_ops for a given 1810 * device is called to enable hardware acceleration of encryption and 1811 * decryption. The callback takes a @sta parameter that will be NULL 1812 * for default keys or keys used for transmission only, or point to 1813 * the station information for the peer for individual keys. 1814 * Multiple transmission keys with the same key index may be used when 1815 * VLANs are configured for an access point. 1816 * 1817 * When transmitting, the TX control data will use the @hw_key_idx 1818 * selected by the driver by modifying the &struct ieee80211_key_conf 1819 * pointed to by the @key parameter to the set_key() function. 1820 * 1821 * The set_key() call for the %SET_KEY command should return 0 if 1822 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1823 * added; if you return 0 then hw_key_idx must be assigned to the 1824 * hardware key index, you are free to use the full u8 range. 1825 * 1826 * When the cmd is %DISABLE_KEY then it must succeed. 1827 * 1828 * Note that it is permissible to not decrypt a frame even if a key 1829 * for it has been uploaded to hardware, the stack will not make any 1830 * decision based on whether a key has been uploaded or not but rather 1831 * based on the receive flags. 1832 * 1833 * The &struct ieee80211_key_conf structure pointed to by the @key 1834 * parameter is guaranteed to be valid until another call to set_key() 1835 * removes it, but it can only be used as a cookie to differentiate 1836 * keys. 1837 * 1838 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1839 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1840 * handler. 1841 * The update_tkip_key() call updates the driver with the new phase 1 key. 1842 * This happens every time the iv16 wraps around (every 65536 packets). The 1843 * set_key() call will happen only once for each key (unless the AP did 1844 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1845 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1846 * handler is software decryption with wrap around of iv16. 1847 * 1848 * The set_default_unicast_key() call updates the default WEP key index 1849 * configured to the hardware for WEP encryption type. This is required 1850 * for devices that support offload of data packets (e.g. ARP responses). 1851 */ 1852 1853/** 1854 * DOC: Powersave support 1855 * 1856 * mac80211 has support for various powersave implementations. 1857 * 1858 * First, it can support hardware that handles all powersaving by itself, 1859 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1860 * flag. In that case, it will be told about the desired powersave mode 1861 * with the %IEEE80211_CONF_PS flag depending on the association status. 1862 * The hardware must take care of sending nullfunc frames when necessary, 1863 * i.e. when entering and leaving powersave mode. The hardware is required 1864 * to look at the AID in beacons and signal to the AP that it woke up when 1865 * it finds traffic directed to it. 1866 * 1867 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1868 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1869 * with hardware wakeup and sleep states. Driver is responsible for waking 1870 * up the hardware before issuing commands to the hardware and putting it 1871 * back to sleep at appropriate times. 1872 * 1873 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1874 * buffered multicast/broadcast frames after the beacon. Also it must be 1875 * possible to send frames and receive the acknowledment frame. 1876 * 1877 * Other hardware designs cannot send nullfunc frames by themselves and also 1878 * need software support for parsing the TIM bitmap. This is also supported 1879 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1880 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1881 * required to pass up beacons. The hardware is still required to handle 1882 * waking up for multicast traffic; if it cannot the driver must handle that 1883 * as best as it can, mac80211 is too slow to do that. 1884 * 1885 * Dynamic powersave is an extension to normal powersave in which the 1886 * hardware stays awake for a user-specified period of time after sending a 1887 * frame so that reply frames need not be buffered and therefore delayed to 1888 * the next wakeup. It's compromise of getting good enough latency when 1889 * there's data traffic and still saving significantly power in idle 1890 * periods. 1891 * 1892 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1893 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1894 * flag and mac80211 will handle everything automatically. Additionally, 1895 * hardware having support for the dynamic PS feature may set the 1896 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1897 * dynamic PS mode itself. The driver needs to look at the 1898 * @dynamic_ps_timeout hardware configuration value and use it that value 1899 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1900 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1901 * enabled whenever user has enabled powersave. 1902 * 1903 * Driver informs U-APSD client support by enabling 1904 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1905 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS 1906 * Nullfunc frames and stay awake until the service period has ended. To 1907 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1908 * from that AC are transmitted with powersave enabled. 1909 * 1910 * Note: U-APSD client mode is not yet supported with 1911 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1912 */ 1913 1914/** 1915 * DOC: Beacon filter support 1916 * 1917 * Some hardware have beacon filter support to reduce host cpu wakeups 1918 * which will reduce system power consumption. It usually works so that 1919 * the firmware creates a checksum of the beacon but omits all constantly 1920 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1921 * beacon is forwarded to the host, otherwise it will be just dropped. That 1922 * way the host will only receive beacons where some relevant information 1923 * (for example ERP protection or WMM settings) have changed. 1924 * 1925 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1926 * interface capability. The driver needs to enable beacon filter support 1927 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1928 * power save is enabled, the stack will not check for beacon loss and the 1929 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1930 * 1931 * The time (or number of beacons missed) until the firmware notifies the 1932 * driver of a beacon loss event (which in turn causes the driver to call 1933 * ieee80211_beacon_loss()) should be configurable and will be controlled 1934 * by mac80211 and the roaming algorithm in the future. 1935 * 1936 * Since there may be constantly changing information elements that nothing 1937 * in the software stack cares about, we will, in the future, have mac80211 1938 * tell the driver which information elements are interesting in the sense 1939 * that we want to see changes in them. This will include 1940 * - a list of information element IDs 1941 * - a list of OUIs for the vendor information element 1942 * 1943 * Ideally, the hardware would filter out any beacons without changes in the 1944 * requested elements, but if it cannot support that it may, at the expense 1945 * of some efficiency, filter out only a subset. For example, if the device 1946 * doesn't support checking for OUIs it should pass up all changes in all 1947 * vendor information elements. 1948 * 1949 * Note that change, for the sake of simplification, also includes information 1950 * elements appearing or disappearing from the beacon. 1951 * 1952 * Some hardware supports an "ignore list" instead, just make sure nothing 1953 * that was requested is on the ignore list, and include commonly changing 1954 * information element IDs in the ignore list, for example 11 (BSS load) and 1955 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1956 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1957 * it could also include some currently unused IDs. 1958 * 1959 * 1960 * In addition to these capabilities, hardware should support notifying the 1961 * host of changes in the beacon RSSI. This is relevant to implement roaming 1962 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1963 * the received data packets). This can consist in notifying the host when 1964 * the RSSI changes significantly or when it drops below or rises above 1965 * configurable thresholds. In the future these thresholds will also be 1966 * configured by mac80211 (which gets them from userspace) to implement 1967 * them as the roaming algorithm requires. 1968 * 1969 * If the hardware cannot implement this, the driver should ask it to 1970 * periodically pass beacon frames to the host so that software can do the 1971 * signal strength threshold checking. 1972 */ 1973 1974/** 1975 * DOC: Spatial multiplexing power save 1976 * 1977 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1978 * power in an 802.11n implementation. For details on the mechanism 1979 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1980 * "11.2.3 SM power save". 1981 * 1982 * The mac80211 implementation is capable of sending action frames 1983 * to update the AP about the station's SMPS mode, and will instruct 1984 * the driver to enter the specific mode. It will also announce the 1985 * requested SMPS mode during the association handshake. Hardware 1986 * support for this feature is required, and can be indicated by 1987 * hardware flags. 1988 * 1989 * The default mode will be "automatic", which nl80211/cfg80211 1990 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1991 * turned off otherwise. 1992 * 1993 * To support this feature, the driver must set the appropriate 1994 * hardware support flags, and handle the SMPS flag to the config() 1995 * operation. It will then with this mechanism be instructed to 1996 * enter the requested SMPS mode while associated to an HT AP. 1997 */ 1998 1999/** 2000 * DOC: Frame filtering 2001 * 2002 * mac80211 requires to see many management frames for proper 2003 * operation, and users may want to see many more frames when 2004 * in monitor mode. However, for best CPU usage and power consumption, 2005 * having as few frames as possible percolate through the stack is 2006 * desirable. Hence, the hardware should filter as much as possible. 2007 * 2008 * To achieve this, mac80211 uses filter flags (see below) to tell 2009 * the driver's configure_filter() function which frames should be 2010 * passed to mac80211 and which should be filtered out. 2011 * 2012 * Before configure_filter() is invoked, the prepare_multicast() 2013 * callback is invoked with the parameters @mc_count and @mc_list 2014 * for the combined multicast address list of all virtual interfaces. 2015 * It's use is optional, and it returns a u64 that is passed to 2016 * configure_filter(). Additionally, configure_filter() has the 2017 * arguments @changed_flags telling which flags were changed and 2018 * @total_flags with the new flag states. 2019 * 2020 * If your device has no multicast address filters your driver will 2021 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2022 * parameter to see whether multicast frames should be accepted 2023 * or dropped. 2024 * 2025 * All unsupported flags in @total_flags must be cleared. 2026 * Hardware does not support a flag if it is incapable of _passing_ 2027 * the frame to the stack. Otherwise the driver must ignore 2028 * the flag, but not clear it. 2029 * You must _only_ clear the flag (announce no support for the 2030 * flag to mac80211) if you are not able to pass the packet type 2031 * to the stack (so the hardware always filters it). 2032 * So for example, you should clear @FIF_CONTROL, if your hardware 2033 * always filters control frames. If your hardware always passes 2034 * control frames to the kernel and is incapable of filtering them, 2035 * you do _not_ clear the @FIF_CONTROL flag. 2036 * This rule applies to all other FIF flags as well. 2037 */ 2038 2039/** 2040 * DOC: AP support for powersaving clients 2041 * 2042 * In order to implement AP and P2P GO modes, mac80211 has support for 2043 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2044 * There currently is no support for sAPSD. 2045 * 2046 * There is one assumption that mac80211 makes, namely that a client 2047 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2048 * Both are supported, and both can be used by the same client, but 2049 * they can't be used concurrently by the same client. This simplifies 2050 * the driver code. 2051 * 2052 * The first thing to keep in mind is that there is a flag for complete 2053 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2054 * mac80211 expects the driver to handle most of the state machine for 2055 * powersaving clients and will ignore the PM bit in incoming frames. 2056 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2057 * stations' powersave transitions. In this mode, mac80211 also doesn't 2058 * handle PS-Poll/uAPSD. 2059 * 2060 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2061 * PM bit in incoming frames for client powersave transitions. When a 2062 * station goes to sleep, we will stop transmitting to it. There is, 2063 * however, a race condition: a station might go to sleep while there is 2064 * data buffered on hardware queues. If the device has support for this 2065 * it will reject frames, and the driver should give the frames back to 2066 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2067 * cause mac80211 to retry the frame when the station wakes up. The 2068 * driver is also notified of powersave transitions by calling its 2069 * @sta_notify callback. 2070 * 2071 * When the station is asleep, it has three choices: it can wake up, 2072 * it can PS-Poll, or it can possibly start a uAPSD service period. 2073 * Waking up is implemented by simply transmitting all buffered (and 2074 * filtered) frames to the station. This is the easiest case. When 2075 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2076 * will inform the driver of this with the @allow_buffered_frames 2077 * callback; this callback is optional. mac80211 will then transmit 2078 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2079 * on each frame. The last frame in the service period (or the only 2080 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2081 * indicate that it ends the service period; as this frame must have 2082 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2083 * When TX status is reported for this frame, the service period is 2084 * marked has having ended and a new one can be started by the peer. 2085 * 2086 * Additionally, non-bufferable MMPDUs can also be transmitted by 2087 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2088 * 2089 * Another race condition can happen on some devices like iwlwifi 2090 * when there are frames queued for the station and it wakes up 2091 * or polls; the frames that are already queued could end up being 2092 * transmitted first instead, causing reordering and/or wrong 2093 * processing of the EOSP. The cause is that allowing frames to be 2094 * transmitted to a certain station is out-of-band communication to 2095 * the device. To allow this problem to be solved, the driver can 2096 * call ieee80211_sta_block_awake() if frames are buffered when it 2097 * is notified that the station went to sleep. When all these frames 2098 * have been filtered (see above), it must call the function again 2099 * to indicate that the station is no longer blocked. 2100 * 2101 * If the driver buffers frames in the driver for aggregation in any 2102 * way, it must use the ieee80211_sta_set_buffered() call when it is 2103 * notified of the station going to sleep to inform mac80211 of any 2104 * TIDs that have frames buffered. Note that when a station wakes up 2105 * this information is reset (hence the requirement to call it when 2106 * informed of the station going to sleep). Then, when a service 2107 * period starts for any reason, @release_buffered_frames is called 2108 * with the number of frames to be released and which TIDs they are 2109 * to come from. In this case, the driver is responsible for setting 2110 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2111 * to help the @more_data parameter is passed to tell the driver if 2112 * there is more data on other TIDs -- the TIDs to release frames 2113 * from are ignored since mac80211 doesn't know how many frames the 2114 * buffers for those TIDs contain. 2115 * 2116 * If the driver also implement GO mode, where absence periods may 2117 * shorten service periods (or abort PS-Poll responses), it must 2118 * filter those response frames except in the case of frames that 2119 * are buffered in the driver -- those must remain buffered to avoid 2120 * reordering. Because it is possible that no frames are released 2121 * in this case, the driver must call ieee80211_sta_eosp() 2122 * to indicate to mac80211 that the service period ended anyway. 2123 * 2124 * Finally, if frames from multiple TIDs are released from mac80211 2125 * but the driver might reorder them, it must clear & set the flags 2126 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2127 * and also take care of the EOSP and MORE_DATA bits in the frame. 2128 * The driver may also use ieee80211_sta_eosp() in this case. 2129 * 2130 * Note that if the driver ever buffers frames other than QoS-data 2131 * frames, it must take care to never send a non-QoS-data frame as 2132 * the last frame in a service period, adding a QoS-nulldata frame 2133 * after a non-QoS-data frame if needed. 2134 */ 2135 2136/** 2137 * DOC: HW queue control 2138 * 2139 * Before HW queue control was introduced, mac80211 only had a single static 2140 * assignment of per-interface AC software queues to hardware queues. This 2141 * was problematic for a few reasons: 2142 * 1) off-channel transmissions might get stuck behind other frames 2143 * 2) multiple virtual interfaces couldn't be handled correctly 2144 * 3) after-DTIM frames could get stuck behind other frames 2145 * 2146 * To solve this, hardware typically uses multiple different queues for all 2147 * the different usages, and this needs to be propagated into mac80211 so it 2148 * won't have the same problem with the software queues. 2149 * 2150 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2151 * flag that tells it that the driver implements its own queue control. To do 2152 * so, the driver will set up the various queues in each &struct ieee80211_vif 2153 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2154 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2155 * if necessary will queue the frame on the right software queue that mirrors 2156 * the hardware queue. 2157 * Additionally, the driver has to then use these HW queue IDs for the queue 2158 * management functions (ieee80211_stop_queue() et al.) 2159 * 2160 * The driver is free to set up the queue mappings as needed, multiple virtual 2161 * interfaces may map to the same hardware queues if needed. The setup has to 2162 * happen during add_interface or change_interface callbacks. For example, a 2163 * driver supporting station+station and station+AP modes might decide to have 2164 * 10 hardware queues to handle different scenarios: 2165 * 2166 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2167 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2168 * after-DTIM queue for AP: 8 2169 * off-channel queue: 9 2170 * 2171 * It would then set up the hardware like this: 2172 * hw.offchannel_tx_hw_queue = 9 2173 * 2174 * and the first virtual interface that is added as follows: 2175 * vif.hw_queue[IEEE80211_AC_VO] = 0 2176 * vif.hw_queue[IEEE80211_AC_VI] = 1 2177 * vif.hw_queue[IEEE80211_AC_BE] = 2 2178 * vif.hw_queue[IEEE80211_AC_BK] = 3 2179 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2180 * and the second virtual interface with 4-7. 2181 * 2182 * If queue 6 gets full, for example, mac80211 would only stop the second 2183 * virtual interface's BE queue since virtual interface queues are per AC. 2184 * 2185 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2186 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2187 * queue could potentially be shared since mac80211 will look at cab_queue when 2188 * a queue is stopped/woken even if the interface is not in AP mode. 2189 */ 2190 2191/** 2192 * enum ieee80211_filter_flags - hardware filter flags 2193 * 2194 * These flags determine what the filter in hardware should be 2195 * programmed to let through and what should not be passed to the 2196 * stack. It is always safe to pass more frames than requested, 2197 * but this has negative impact on power consumption. 2198 * 2199 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 2200 * think of the BSS as your network segment and then this corresponds 2201 * to the regular ethernet device promiscuous mode. 2202 * 2203 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2204 * by the user or if the hardware is not capable of filtering by 2205 * multicast address. 2206 * 2207 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2208 * %RX_FLAG_FAILED_FCS_CRC for them) 2209 * 2210 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2211 * the %RX_FLAG_FAILED_PLCP_CRC for them 2212 * 2213 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2214 * to the hardware that it should not filter beacons or probe responses 2215 * by BSSID. Filtering them can greatly reduce the amount of processing 2216 * mac80211 needs to do and the amount of CPU wakeups, so you should 2217 * honour this flag if possible. 2218 * 2219 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2220 * is not set then only those addressed to this station. 2221 * 2222 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2223 * 2224 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2225 * those addressed to this station. 2226 * 2227 * @FIF_PROBE_REQ: pass probe request frames 2228 */ 2229enum ieee80211_filter_flags { 2230 FIF_PROMISC_IN_BSS = 1<<0, 2231 FIF_ALLMULTI = 1<<1, 2232 FIF_FCSFAIL = 1<<2, 2233 FIF_PLCPFAIL = 1<<3, 2234 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2235 FIF_CONTROL = 1<<5, 2236 FIF_OTHER_BSS = 1<<6, 2237 FIF_PSPOLL = 1<<7, 2238 FIF_PROBE_REQ = 1<<8, 2239}; 2240 2241/** 2242 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2243 * 2244 * These flags are used with the ampdu_action() callback in 2245 * &struct ieee80211_ops to indicate which action is needed. 2246 * 2247 * Note that drivers MUST be able to deal with a TX aggregation 2248 * session being stopped even before they OK'ed starting it by 2249 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2250 * might receive the addBA frame and send a delBA right away! 2251 * 2252 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2253 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2254 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2255 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2256 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2257 * queued packets, now unaggregated. After all packets are transmitted the 2258 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2259 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2260 * called when the station is removed. There's no need or reason to call 2261 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2262 * session is gone and removes the station. 2263 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2264 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2265 * now the connection is dropped and the station will be removed. Drivers 2266 * should clean up and drop remaining packets when this is called. 2267 */ 2268enum ieee80211_ampdu_mlme_action { 2269 IEEE80211_AMPDU_RX_START, 2270 IEEE80211_AMPDU_RX_STOP, 2271 IEEE80211_AMPDU_TX_START, 2272 IEEE80211_AMPDU_TX_STOP_CONT, 2273 IEEE80211_AMPDU_TX_STOP_FLUSH, 2274 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2275 IEEE80211_AMPDU_TX_OPERATIONAL, 2276}; 2277 2278/** 2279 * enum ieee80211_frame_release_type - frame release reason 2280 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2281 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2282 * frame received on trigger-enabled AC 2283 */ 2284enum ieee80211_frame_release_type { 2285 IEEE80211_FRAME_RELEASE_PSPOLL, 2286 IEEE80211_FRAME_RELEASE_UAPSD, 2287}; 2288 2289/** 2290 * enum ieee80211_rate_control_changed - flags to indicate what changed 2291 * 2292 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2293 * to this station changed. The actual bandwidth is in the station 2294 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2295 * flag changes, for HT and VHT the bandwidth field changes. 2296 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2297 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2298 * changed (in IBSS mode) due to discovering more information about 2299 * the peer. 2300 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2301 * by the peer 2302 */ 2303enum ieee80211_rate_control_changed { 2304 IEEE80211_RC_BW_CHANGED = BIT(0), 2305 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2306 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2307 IEEE80211_RC_NSS_CHANGED = BIT(3), 2308}; 2309 2310/** 2311 * enum ieee80211_roc_type - remain on channel type 2312 * 2313 * With the support for multi channel contexts and multi channel operations, 2314 * remain on channel operations might be limited/deferred/aborted by other 2315 * flows/operations which have higher priority (and vise versa). 2316 * Specifying the ROC type can be used by devices to prioritize the ROC 2317 * operations compared to other operations/flows. 2318 * 2319 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2320 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2321 * for sending managment frames offchannel. 2322 */ 2323enum ieee80211_roc_type { 2324 IEEE80211_ROC_TYPE_NORMAL = 0, 2325 IEEE80211_ROC_TYPE_MGMT_TX, 2326}; 2327 2328/** 2329 * struct ieee80211_ops - callbacks from mac80211 to the driver 2330 * 2331 * This structure contains various callbacks that the driver may 2332 * handle or, in some cases, must handle, for example to configure 2333 * the hardware to a new channel or to transmit a frame. 2334 * 2335 * @tx: Handler that 802.11 module calls for each transmitted frame. 2336 * skb contains the buffer starting from the IEEE 802.11 header. 2337 * The low-level driver should send the frame out based on 2338 * configuration in the TX control data. This handler should, 2339 * preferably, never fail and stop queues appropriately. 2340 * Must be atomic. 2341 * 2342 * @start: Called before the first netdevice attached to the hardware 2343 * is enabled. This should turn on the hardware and must turn on 2344 * frame reception (for possibly enabled monitor interfaces.) 2345 * Returns negative error codes, these may be seen in userspace, 2346 * or zero. 2347 * When the device is started it should not have a MAC address 2348 * to avoid acknowledging frames before a non-monitor device 2349 * is added. 2350 * Must be implemented and can sleep. 2351 * 2352 * @stop: Called after last netdevice attached to the hardware 2353 * is disabled. This should turn off the hardware (at least 2354 * it must turn off frame reception.) 2355 * May be called right after add_interface if that rejects 2356 * an interface. If you added any work onto the mac80211 workqueue 2357 * you should ensure to cancel it on this callback. 2358 * Must be implemented and can sleep. 2359 * 2360 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2361 * stop transmitting and doing any other configuration, and then 2362 * ask the device to suspend. This is only invoked when WoWLAN is 2363 * configured, otherwise the device is deconfigured completely and 2364 * reconfigured at resume time. 2365 * The driver may also impose special conditions under which it 2366 * wants to use the "normal" suspend (deconfigure), say if it only 2367 * supports WoWLAN when the device is associated. In this case, it 2368 * must return 1 from this function. 2369 * 2370 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2371 * now resuming its operation, after this the device must be fully 2372 * functional again. If this returns an error, the only way out is 2373 * to also unregister the device. If it returns 1, then mac80211 2374 * will also go through the regular complete restart on resume. 2375 * 2376 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2377 * modified. The reason is that device_set_wakeup_enable() is 2378 * supposed to be called when the configuration changes, not only 2379 * in suspend(). 2380 * 2381 * @add_interface: Called when a netdevice attached to the hardware is 2382 * enabled. Because it is not called for monitor mode devices, @start 2383 * and @stop must be implemented. 2384 * The driver should perform any initialization it needs before 2385 * the device can be enabled. The initial configuration for the 2386 * interface is given in the conf parameter. 2387 * The callback may refuse to add an interface by returning a 2388 * negative error code (which will be seen in userspace.) 2389 * Must be implemented and can sleep. 2390 * 2391 * @change_interface: Called when a netdevice changes type. This callback 2392 * is optional, but only if it is supported can interface types be 2393 * switched while the interface is UP. The callback may sleep. 2394 * Note that while an interface is being switched, it will not be 2395 * found by the interface iteration callbacks. 2396 * 2397 * @remove_interface: Notifies a driver that an interface is going down. 2398 * The @stop callback is called after this if it is the last interface 2399 * and no monitor interfaces are present. 2400 * When all interfaces are removed, the MAC address in the hardware 2401 * must be cleared so the device no longer acknowledges packets, 2402 * the mac_addr member of the conf structure is, however, set to the 2403 * MAC address of the device going away. 2404 * Hence, this callback must be implemented. It can sleep. 2405 * 2406 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2407 * function to change hardware configuration, e.g., channel. 2408 * This function should never fail but returns a negative error code 2409 * if it does. The callback can sleep. 2410 * 2411 * @bss_info_changed: Handler for configuration requests related to BSS 2412 * parameters that may vary during BSS's lifespan, and may affect low 2413 * level driver (e.g. assoc/disassoc status, erp parameters). 2414 * This function should not be used if no BSS has been set, unless 2415 * for association indication. The @changed parameter indicates which 2416 * of the bss parameters has changed when a call is made. The callback 2417 * can sleep. 2418 * 2419 * @prepare_multicast: Prepare for multicast filter configuration. 2420 * This callback is optional, and its return value is passed 2421 * to configure_filter(). This callback must be atomic. 2422 * 2423 * @configure_filter: Configure the device's RX filter. 2424 * See the section "Frame filtering" for more information. 2425 * This callback must be implemented and can sleep. 2426 * 2427 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2428 * must be set or cleared for a given STA. Must be atomic. 2429 * 2430 * @set_key: See the section "Hardware crypto acceleration" 2431 * This callback is only called between add_interface and 2432 * remove_interface calls, i.e. while the given virtual interface 2433 * is enabled. 2434 * Returns a negative error code if the key can't be added. 2435 * The callback can sleep. 2436 * 2437 * @update_tkip_key: See the section "Hardware crypto acceleration" 2438 * This callback will be called in the context of Rx. Called for drivers 2439 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2440 * The callback must be atomic. 2441 * 2442 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2443 * host is suspended, it can assign this callback to retrieve the data 2444 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2445 * After rekeying was done it should (for example during resume) notify 2446 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2447 * 2448 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2449 * WEP when the device sends data packets autonomously, e.g. for ARP 2450 * offloading. The index can be 0-3, or -1 for unsetting it. 2451 * 2452 * @hw_scan: Ask the hardware to service the scan request, no need to start 2453 * the scan state machine in stack. The scan must honour the channel 2454 * configuration done by the regulatory agent in the wiphy's 2455 * registered bands. The hardware (or the driver) needs to make sure 2456 * that power save is disabled. 2457 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2458 * entire IEs after the SSID, so that drivers need not look at these 2459 * at all but just send them after the SSID -- mac80211 includes the 2460 * (extended) supported rates and HT information (where applicable). 2461 * When the scan finishes, ieee80211_scan_completed() must be called; 2462 * note that it also must be called when the scan cannot finish due to 2463 * any error unless this callback returned a negative error code. 2464 * The callback can sleep. 2465 * 2466 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2467 * The driver should ask the hardware to cancel the scan (if possible), 2468 * but the scan will be completed only after the driver will call 2469 * ieee80211_scan_completed(). 2470 * This callback is needed for wowlan, to prevent enqueueing a new 2471 * scan_work after the low-level driver was already suspended. 2472 * The callback can sleep. 2473 * 2474 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2475 * specific intervals. The driver must call the 2476 * ieee80211_sched_scan_results() function whenever it finds results. 2477 * This process will continue until sched_scan_stop is called. 2478 * 2479 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2480 * In this case, ieee80211_sched_scan_stopped() must not be called. 2481 * 2482 * @sw_scan_start: Notifier function that is called just before a software scan 2483 * is started. Can be NULL, if the driver doesn't need this notification. 2484 * The callback can sleep. 2485 * 2486 * @sw_scan_complete: Notifier function that is called just after a 2487 * software scan finished. Can be NULL, if the driver doesn't need 2488 * this notification. 2489 * The callback can sleep. 2490 * 2491 * @get_stats: Return low-level statistics. 2492 * Returns zero if statistics are available. 2493 * The callback can sleep. 2494 * 2495 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2496 * callback should be provided to read the TKIP transmit IVs (both IV32 2497 * and IV16) for the given key from hardware. 2498 * The callback must be atomic. 2499 * 2500 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2501 * if the device does fragmentation by itself; if this callback is 2502 * implemented then the stack will not do fragmentation. 2503 * The callback can sleep. 2504 * 2505 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2506 * The callback can sleep. 2507 * 2508 * @sta_add: Notifies low level driver about addition of an associated station, 2509 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2510 * 2511 * @sta_remove: Notifies low level driver about removal of an associated 2512 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 2513 * returns it isn't safe to use the pointer, not even RCU protected; 2514 * no RCU grace period is guaranteed between returning here and freeing 2515 * the station. See @sta_pre_rcu_remove if needed. 2516 * This callback can sleep. 2517 * 2518 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2519 * when a station is added to mac80211's station list. This callback 2520 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2521 * conditional. This callback can sleep. 2522 * 2523 * @sta_remove_debugfs: Remove the debugfs files which were added using 2524 * @sta_add_debugfs. This callback can sleep. 2525 * 2526 * @sta_notify: Notifies low level driver about power state transition of an 2527 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2528 * in AP mode, this callback will not be called when the flag 2529 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2530 * 2531 * @sta_state: Notifies low level driver about state transition of a 2532 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2533 * This callback is mutually exclusive with @sta_add/@sta_remove. 2534 * It must not fail for down transitions but may fail for transitions 2535 * up the list of states. Also note that after the callback returns it 2536 * isn't safe to use the pointer, not even RCU protected - no RCU grace 2537 * period is guaranteed between returning here and freeing the station. 2538 * See @sta_pre_rcu_remove if needed. 2539 * The callback can sleep. 2540 * 2541 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 2542 * synchronisation. This is useful if a driver needs to have station 2543 * pointers protected using RCU, it can then use this call to clear 2544 * the pointers instead of waiting for an RCU grace period to elapse 2545 * in @sta_state. 2546 * The callback can sleep. 2547 * 2548 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2549 * used to transmit to the station. The changes are advertised with bits 2550 * from &enum ieee80211_rate_control_changed and the values are reflected 2551 * in the station data. This callback should only be used when the driver 2552 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2553 * otherwise the rate control algorithm is notified directly. 2554 * Must be atomic. 2555 * 2556 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2557 * bursting) for a hardware TX queue. 2558 * Returns a negative error code on failure. 2559 * The callback can sleep. 2560 * 2561 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2562 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2563 * required function. 2564 * The callback can sleep. 2565 * 2566 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2567 * Currently, this is only used for IBSS mode debugging. Is not a 2568 * required function. 2569 * The callback can sleep. 2570 * 2571 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2572 * with other STAs in the IBSS. This is only used in IBSS mode. This 2573 * function is optional if the firmware/hardware takes full care of 2574 * TSF synchronization. 2575 * The callback can sleep. 2576 * 2577 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2578 * This is needed only for IBSS mode and the result of this function is 2579 * used to determine whether to reply to Probe Requests. 2580 * Returns non-zero if this device sent the last beacon. 2581 * The callback can sleep. 2582 * 2583 * @ampdu_action: Perform a certain A-MPDU action 2584 * The RA/TID combination determines the destination and TID we want 2585 * the ampdu action to be performed for. The action is defined through 2586 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2587 * is the first frame we expect to perform the action on. Notice 2588 * that TX/RX_STOP can pass NULL for this parameter. 2589 * The @buf_size parameter is only valid when the action is set to 2590 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2591 * buffer size (number of subframes) for this session -- the driver 2592 * may neither send aggregates containing more subframes than this 2593 * nor send aggregates in a way that lost frames would exceed the 2594 * buffer size. If just limiting the aggregate size, this would be 2595 * possible with a buf_size of 8: 2596 * - TX: 1.....7 2597 * - RX: 2....7 (lost frame #1) 2598 * - TX: 8..1... 2599 * which is invalid since #1 was now re-transmitted well past the 2600 * buffer size of 8. Correct ways to retransmit #1 would be: 2601 * - TX: 1 or 18 or 81 2602 * Even "189" would be wrong since 1 could be lost again. 2603 * 2604 * Returns a negative error code on failure. 2605 * The callback can sleep. 2606 * 2607 * @get_survey: Return per-channel survey information 2608 * 2609 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2610 * need to set wiphy->rfkill_poll to %true before registration, 2611 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2612 * The callback can sleep. 2613 * 2614 * @set_coverage_class: Set slot time for given coverage class as specified 2615 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2616 * accordingly. This callback is not required and may sleep. 2617 * 2618 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 2619 * be %NULL. The callback can sleep. 2620 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2621 * 2622 * @flush: Flush all pending frames from the hardware queue, making sure 2623 * that the hardware queues are empty. The @queues parameter is a bitmap 2624 * of queues to flush, which is useful if different virtual interfaces 2625 * use different hardware queues; it may also indicate all queues. 2626 * If the parameter @drop is set to %true, pending frames may be dropped. 2627 * Note that vif can be NULL. 2628 * The callback can sleep. 2629 * 2630 * @channel_switch: Drivers that need (or want) to offload the channel 2631 * switch operation for CSAs received from the AP may implement this 2632 * callback. They must then call ieee80211_chswitch_done() to indicate 2633 * completion of the channel switch. 2634 * 2635 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2636 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2637 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2638 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2639 * 2640 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2641 * 2642 * @remain_on_channel: Starts an off-channel period on the given channel, must 2643 * call back to ieee80211_ready_on_channel() when on that channel. Note 2644 * that normal channel traffic is not stopped as this is intended for hw 2645 * offload. Frames to transmit on the off-channel channel are transmitted 2646 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2647 * duration (which will always be non-zero) expires, the driver must call 2648 * ieee80211_remain_on_channel_expired(). 2649 * Note that this callback may be called while the device is in IDLE and 2650 * must be accepted in this case. 2651 * This callback may sleep. 2652 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2653 * aborted before it expires. This callback may sleep. 2654 * 2655 * @set_ringparam: Set tx and rx ring sizes. 2656 * 2657 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2658 * 2659 * @tx_frames_pending: Check if there is any pending frame in the hardware 2660 * queues before entering power save. 2661 * 2662 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2663 * when transmitting a frame. Currently only legacy rates are handled. 2664 * The callback can sleep. 2665 * @rssi_callback: Notify driver when the average RSSI goes above/below 2666 * thresholds that were registered previously. The callback can sleep. 2667 * 2668 * @release_buffered_frames: Release buffered frames according to the given 2669 * parameters. In the case where the driver buffers some frames for 2670 * sleeping stations mac80211 will use this callback to tell the driver 2671 * to release some frames, either for PS-poll or uAPSD. 2672 * Note that if the @more_data parameter is %false the driver must check 2673 * if there are more frames on the given TIDs, and if there are more than 2674 * the frames being released then it must still set the more-data bit in 2675 * the frame. If the @more_data parameter is %true, then of course the 2676 * more-data bit must always be set. 2677 * The @tids parameter tells the driver which TIDs to release frames 2678 * from, for PS-poll it will always have only a single bit set. 2679 * In the case this is used for a PS-poll initiated release, the 2680 * @num_frames parameter will always be 1 so code can be shared. In 2681 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2682 * on the TX status (and must report TX status) so that the PS-poll 2683 * period is properly ended. This is used to avoid sending multiple 2684 * responses for a retried PS-poll frame. 2685 * In the case this is used for uAPSD, the @num_frames parameter may be 2686 * bigger than one, but the driver may send fewer frames (it must send 2687 * at least one, however). In this case it is also responsible for 2688 * setting the EOSP flag in the QoS header of the frames. Also, when the 2689 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2690 * on the last frame in the SP. Alternatively, it may call the function 2691 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 2692 * This callback must be atomic. 2693 * @allow_buffered_frames: Prepare device to allow the given number of frames 2694 * to go out to the given station. The frames will be sent by mac80211 2695 * via the usual TX path after this call. The TX information for frames 2696 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2697 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2698 * frames from multiple TIDs are released and the driver might reorder 2699 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2700 * on the last frame and clear it on all others and also handle the EOSP 2701 * bit in the QoS header correctly. Alternatively, it can also call the 2702 * ieee80211_sta_eosp() function. 2703 * The @tids parameter is a bitmap and tells the driver which TIDs the 2704 * frames will be on; it will at most have two bits set. 2705 * This callback must be atomic. 2706 * 2707 * @get_et_sset_count: Ethtool API to get string-set count. 2708 * 2709 * @get_et_stats: Ethtool API to get a set of u64 stats. 2710 * 2711 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2712 * and perhaps other supported types of ethtool data-sets. 2713 * 2714 * @get_rssi: Get current signal strength in dBm, the function is optional 2715 * and can sleep. 2716 * 2717 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2718 * before associated. In multi-channel scenarios, a virtual interface is 2719 * bound to a channel before it is associated, but as it isn't associated 2720 * yet it need not necessarily be given airtime, in particular since any 2721 * transmission to a P2P GO needs to be synchronized against the GO's 2722 * powersave state. mac80211 will call this function before transmitting a 2723 * management frame prior to having successfully associated to allow the 2724 * driver to give it channel time for the transmission, to get a response 2725 * and to be able to synchronize with the GO. 2726 * The callback will be called before each transmission and upon return 2727 * mac80211 will transmit the frame right away. 2728 * The callback is optional and can (should!) sleep. 2729 * 2730 * @add_chanctx: Notifies device driver about new channel context creation. 2731 * @remove_chanctx: Notifies device driver about channel context destruction. 2732 * @change_chanctx: Notifies device driver about channel context changes that 2733 * may happen when combining different virtual interfaces on the same 2734 * channel context with different settings 2735 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2736 * to vif. Possible use is for hw queue remapping. 2737 * @unassign_vif_chanctx: Notifies device driver about channel context being 2738 * unbound from vif. 2739 * @start_ap: Start operation on the AP interface, this is called after all the 2740 * information in bss_conf is set and beacon can be retrieved. A channel 2741 * context is bound before this is called. Note that if the driver uses 2742 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2743 * just "paused" for scanning/ROC, which is indicated by the beacon being 2744 * disabled/enabled via @bss_info_changed. 2745 * @stop_ap: Stop operation on the AP interface. 2746 * 2747 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2748 * reconfiguration has completed. This can help the driver implement the 2749 * reconfiguration step. Also called when reconfiguring because the 2750 * driver's resume function returned 1, as this is just like an "inline" 2751 * hardware restart. This callback may sleep. 2752 * 2753 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2754 * Currently, this is only called for managed or P2P client interfaces. 2755 * This callback is optional; it must not sleep. 2756 * 2757 * @channel_switch_beacon: Starts a channel switch to a new channel. 2758 * Beacons are modified to include CSA or ECSA IEs before calling this 2759 * function. The corresponding count fields in these IEs must be 2760 * decremented, and when they reach 1 the driver must call 2761 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 2762 * get the csa counter decremented by mac80211, but must check if it is 2763 * 1 using ieee80211_csa_is_complete() after the beacon has been 2764 * transmitted and then call ieee80211_csa_finish(). 2765 * If the CSA count starts as zero or 1, this function will not be called, 2766 * since there won't be any time to beacon before the switch anyway. 2767 * 2768 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 2769 * information in bss_conf is set up and the beacon can be retrieved. A 2770 * channel context is bound before this is called. 2771 * @leave_ibss: Leave the IBSS again. 2772 */ 2773struct ieee80211_ops { 2774 void (*tx)(struct ieee80211_hw *hw, 2775 struct ieee80211_tx_control *control, 2776 struct sk_buff *skb); 2777 int (*start)(struct ieee80211_hw *hw); 2778 void (*stop)(struct ieee80211_hw *hw); 2779#ifdef CONFIG_PM 2780 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2781 int (*resume)(struct ieee80211_hw *hw); 2782 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2783#endif 2784 int (*add_interface)(struct ieee80211_hw *hw, 2785 struct ieee80211_vif *vif); 2786 int (*change_interface)(struct ieee80211_hw *hw, 2787 struct ieee80211_vif *vif, 2788 enum nl80211_iftype new_type, bool p2p); 2789 void (*remove_interface)(struct ieee80211_hw *hw, 2790 struct ieee80211_vif *vif); 2791 int (*config)(struct ieee80211_hw *hw, u32 changed); 2792 void (*bss_info_changed)(struct ieee80211_hw *hw, 2793 struct ieee80211_vif *vif, 2794 struct ieee80211_bss_conf *info, 2795 u32 changed); 2796 2797 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2798 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2799 2800 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2801 struct netdev_hw_addr_list *mc_list); 2802 void (*configure_filter)(struct ieee80211_hw *hw, 2803 unsigned int changed_flags, 2804 unsigned int *total_flags, 2805 u64 multicast); 2806 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2807 bool set); 2808 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2809 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2810 struct ieee80211_key_conf *key); 2811 void (*update_tkip_key)(struct ieee80211_hw *hw, 2812 struct ieee80211_vif *vif, 2813 struct ieee80211_key_conf *conf, 2814 struct ieee80211_sta *sta, 2815 u32 iv32, u16 *phase1key); 2816 void (*set_rekey_data)(struct ieee80211_hw *hw, 2817 struct ieee80211_vif *vif, 2818 struct cfg80211_gtk_rekey_data *data); 2819 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2820 struct ieee80211_vif *vif, int idx); 2821 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2822 struct cfg80211_scan_request *req); 2823 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2824 struct ieee80211_vif *vif); 2825 int (*sched_scan_start)(struct ieee80211_hw *hw, 2826 struct ieee80211_vif *vif, 2827 struct cfg80211_sched_scan_request *req, 2828 struct ieee80211_sched_scan_ies *ies); 2829 int (*sched_scan_stop)(struct ieee80211_hw *hw, 2830 struct ieee80211_vif *vif); 2831 void (*sw_scan_start)(struct ieee80211_hw *hw); 2832 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2833 int (*get_stats)(struct ieee80211_hw *hw, 2834 struct ieee80211_low_level_stats *stats); 2835 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2836 u32 *iv32, u16 *iv16); 2837 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2838 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2839 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2840 struct ieee80211_sta *sta); 2841 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2842 struct ieee80211_sta *sta); 2843#ifdef CONFIG_MAC80211_DEBUGFS 2844 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2845 struct ieee80211_vif *vif, 2846 struct ieee80211_sta *sta, 2847 struct dentry *dir); 2848 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2849 struct ieee80211_vif *vif, 2850 struct ieee80211_sta *sta, 2851 struct dentry *dir); 2852#endif 2853 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2854 enum sta_notify_cmd, struct ieee80211_sta *sta); 2855 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2856 struct ieee80211_sta *sta, 2857 enum ieee80211_sta_state old_state, 2858 enum ieee80211_sta_state new_state); 2859 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 2860 struct ieee80211_vif *vif, 2861 struct ieee80211_sta *sta); 2862 void (*sta_rc_update)(struct ieee80211_hw *hw, 2863 struct ieee80211_vif *vif, 2864 struct ieee80211_sta *sta, 2865 u32 changed); 2866 int (*conf_tx)(struct ieee80211_hw *hw, 2867 struct ieee80211_vif *vif, u16 ac, 2868 const struct ieee80211_tx_queue_params *params); 2869 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2870 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2871 u64 tsf); 2872 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2873 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2874 int (*ampdu_action)(struct ieee80211_hw *hw, 2875 struct ieee80211_vif *vif, 2876 enum ieee80211_ampdu_mlme_action action, 2877 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2878 u8 buf_size); 2879 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2880 struct survey_info *survey); 2881 void (*rfkill_poll)(struct ieee80211_hw *hw); 2882 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2883#ifdef CONFIG_NL80211_TESTMODE 2884 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2885 void *data, int len); 2886 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2887 struct netlink_callback *cb, 2888 void *data, int len); 2889#endif 2890 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2891 u32 queues, bool drop); 2892 void (*channel_switch)(struct ieee80211_hw *hw, 2893 struct ieee80211_channel_switch *ch_switch); 2894 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2895 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2896 2897 int (*remain_on_channel)(struct ieee80211_hw *hw, 2898 struct ieee80211_vif *vif, 2899 struct ieee80211_channel *chan, 2900 int duration, 2901 enum ieee80211_roc_type type); 2902 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2903 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2904 void (*get_ringparam)(struct ieee80211_hw *hw, 2905 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2906 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2907 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2908 const struct cfg80211_bitrate_mask *mask); 2909 void (*rssi_callback)(struct ieee80211_hw *hw, 2910 struct ieee80211_vif *vif, 2911 enum ieee80211_rssi_event rssi_event); 2912 2913 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2914 struct ieee80211_sta *sta, 2915 u16 tids, int num_frames, 2916 enum ieee80211_frame_release_type reason, 2917 bool more_data); 2918 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2919 struct ieee80211_sta *sta, 2920 u16 tids, int num_frames, 2921 enum ieee80211_frame_release_type reason, 2922 bool more_data); 2923 2924 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2925 struct ieee80211_vif *vif, int sset); 2926 void (*get_et_stats)(struct ieee80211_hw *hw, 2927 struct ieee80211_vif *vif, 2928 struct ethtool_stats *stats, u64 *data); 2929 void (*get_et_strings)(struct ieee80211_hw *hw, 2930 struct ieee80211_vif *vif, 2931 u32 sset, u8 *data); 2932 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2933 struct ieee80211_sta *sta, s8 *rssi_dbm); 2934 2935 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2936 struct ieee80211_vif *vif); 2937 2938 int (*add_chanctx)(struct ieee80211_hw *hw, 2939 struct ieee80211_chanctx_conf *ctx); 2940 void (*remove_chanctx)(struct ieee80211_hw *hw, 2941 struct ieee80211_chanctx_conf *ctx); 2942 void (*change_chanctx)(struct ieee80211_hw *hw, 2943 struct ieee80211_chanctx_conf *ctx, 2944 u32 changed); 2945 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2946 struct ieee80211_vif *vif, 2947 struct ieee80211_chanctx_conf *ctx); 2948 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2949 struct ieee80211_vif *vif, 2950 struct ieee80211_chanctx_conf *ctx); 2951 2952 void (*restart_complete)(struct ieee80211_hw *hw); 2953 2954#if IS_ENABLED(CONFIG_IPV6) 2955 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2956 struct ieee80211_vif *vif, 2957 struct inet6_dev *idev); 2958#endif 2959 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 2960 struct ieee80211_vif *vif, 2961 struct cfg80211_chan_def *chandef); 2962 2963 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2964 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2965}; 2966 2967/** 2968 * ieee80211_alloc_hw - Allocate a new hardware device 2969 * 2970 * This must be called once for each hardware device. The returned pointer 2971 * must be used to refer to this device when calling other functions. 2972 * mac80211 allocates a private data area for the driver pointed to by 2973 * @priv in &struct ieee80211_hw, the size of this area is given as 2974 * @priv_data_len. 2975 * 2976 * @priv_data_len: length of private data 2977 * @ops: callbacks for this device 2978 * 2979 * Return: A pointer to the new hardware device, or %NULL on error. 2980 */ 2981struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2982 const struct ieee80211_ops *ops); 2983 2984/** 2985 * ieee80211_register_hw - Register hardware device 2986 * 2987 * You must call this function before any other functions in 2988 * mac80211. Note that before a hardware can be registered, you 2989 * need to fill the contained wiphy's information. 2990 * 2991 * @hw: the device to register as returned by ieee80211_alloc_hw() 2992 * 2993 * Return: 0 on success. An error code otherwise. 2994 */ 2995int ieee80211_register_hw(struct ieee80211_hw *hw); 2996 2997/** 2998 * struct ieee80211_tpt_blink - throughput blink description 2999 * @throughput: throughput in Kbit/sec 3000 * @blink_time: blink time in milliseconds 3001 * (full cycle, ie. one off + one on period) 3002 */ 3003struct ieee80211_tpt_blink { 3004 int throughput; 3005 int blink_time; 3006}; 3007 3008/** 3009 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3010 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3011 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3012 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3013 * interface is connected in some way, including being an AP 3014 */ 3015enum ieee80211_tpt_led_trigger_flags { 3016 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3017 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3018 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3019}; 3020 3021#ifdef CONFIG_MAC80211_LEDS 3022char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3023char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3024char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3025char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3026char *__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3027 unsigned int flags, 3028 const struct ieee80211_tpt_blink *blink_table, 3029 unsigned int blink_table_len); 3030#endif 3031/** 3032 * ieee80211_get_tx_led_name - get name of TX LED 3033 * 3034 * mac80211 creates a transmit LED trigger for each wireless hardware 3035 * that can be used to drive LEDs if your driver registers a LED device. 3036 * This function returns the name (or %NULL if not configured for LEDs) 3037 * of the trigger so you can automatically link the LED device. 3038 * 3039 * @hw: the hardware to get the LED trigger name for 3040 * 3041 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3042 */ 3043static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3044{ 3045#ifdef CONFIG_MAC80211_LEDS 3046 return __ieee80211_get_tx_led_name(hw); 3047#else 3048 return NULL; 3049#endif 3050} 3051 3052/** 3053 * ieee80211_get_rx_led_name - get name of RX LED 3054 * 3055 * mac80211 creates a receive LED trigger for each wireless hardware 3056 * that can be used to drive LEDs if your driver registers a LED device. 3057 * This function returns the name (or %NULL if not configured for LEDs) 3058 * of the trigger so you can automatically link the LED device. 3059 * 3060 * @hw: the hardware to get the LED trigger name for 3061 * 3062 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3063 */ 3064static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3065{ 3066#ifdef CONFIG_MAC80211_LEDS 3067 return __ieee80211_get_rx_led_name(hw); 3068#else 3069 return NULL; 3070#endif 3071} 3072 3073/** 3074 * ieee80211_get_assoc_led_name - get name of association LED 3075 * 3076 * mac80211 creates a association LED trigger for each wireless hardware 3077 * that can be used to drive LEDs if your driver registers a LED device. 3078 * This function returns the name (or %NULL if not configured for LEDs) 3079 * of the trigger so you can automatically link the LED device. 3080 * 3081 * @hw: the hardware to get the LED trigger name for 3082 * 3083 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3084 */ 3085static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3086{ 3087#ifdef CONFIG_MAC80211_LEDS 3088 return __ieee80211_get_assoc_led_name(hw); 3089#else 3090 return NULL; 3091#endif 3092} 3093 3094/** 3095 * ieee80211_get_radio_led_name - get name of radio LED 3096 * 3097 * mac80211 creates a radio change LED trigger for each wireless hardware 3098 * that can be used to drive LEDs if your driver registers a LED device. 3099 * This function returns the name (or %NULL if not configured for LEDs) 3100 * of the trigger so you can automatically link the LED device. 3101 * 3102 * @hw: the hardware to get the LED trigger name for 3103 * 3104 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3105 */ 3106static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3107{ 3108#ifdef CONFIG_MAC80211_LEDS 3109 return __ieee80211_get_radio_led_name(hw); 3110#else 3111 return NULL; 3112#endif 3113} 3114 3115/** 3116 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3117 * @hw: the hardware to create the trigger for 3118 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3119 * @blink_table: the blink table -- needs to be ordered by throughput 3120 * @blink_table_len: size of the blink table 3121 * 3122 * Return: %NULL (in case of error, or if no LED triggers are 3123 * configured) or the name of the new trigger. 3124 * 3125 * Note: This function must be called before ieee80211_register_hw(). 3126 */ 3127static inline char * 3128ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3129 const struct ieee80211_tpt_blink *blink_table, 3130 unsigned int blink_table_len) 3131{ 3132#ifdef CONFIG_MAC80211_LEDS 3133 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3134 blink_table_len); 3135#else 3136 return NULL; 3137#endif 3138} 3139 3140/** 3141 * ieee80211_unregister_hw - Unregister a hardware device 3142 * 3143 * This function instructs mac80211 to free allocated resources 3144 * and unregister netdevices from the networking subsystem. 3145 * 3146 * @hw: the hardware to unregister 3147 */ 3148void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3149 3150/** 3151 * ieee80211_free_hw - free hardware descriptor 3152 * 3153 * This function frees everything that was allocated, including the 3154 * private data for the driver. You must call ieee80211_unregister_hw() 3155 * before calling this function. 3156 * 3157 * @hw: the hardware to free 3158 */ 3159void ieee80211_free_hw(struct ieee80211_hw *hw); 3160 3161/** 3162 * ieee80211_restart_hw - restart hardware completely 3163 * 3164 * Call this function when the hardware was restarted for some reason 3165 * (hardware error, ...) and the driver is unable to restore its state 3166 * by itself. mac80211 assumes that at this point the driver/hardware 3167 * is completely uninitialised and stopped, it starts the process by 3168 * calling the ->start() operation. The driver will need to reset all 3169 * internal state that it has prior to calling this function. 3170 * 3171 * @hw: the hardware to restart 3172 */ 3173void ieee80211_restart_hw(struct ieee80211_hw *hw); 3174 3175/** 3176 * ieee80211_napi_add - initialize mac80211 NAPI context 3177 * @hw: the hardware to initialize the NAPI context on 3178 * @napi: the NAPI context to initialize 3179 * @napi_dev: dummy NAPI netdevice, here to not waste the space if the 3180 * driver doesn't use NAPI 3181 * @poll: poll function 3182 * @weight: default weight 3183 * 3184 * See also netif_napi_add(). 3185 */ 3186void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 3187 struct net_device *napi_dev, 3188 int (*poll)(struct napi_struct *, int), 3189 int weight); 3190 3191/** 3192 * ieee80211_rx - receive frame 3193 * 3194 * Use this function to hand received frames to mac80211. The receive 3195 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3196 * paged @skb is used, the driver is recommended to put the ieee80211 3197 * header of the frame on the linear part of the @skb to avoid memory 3198 * allocation and/or memcpy by the stack. 3199 * 3200 * This function may not be called in IRQ context. Calls to this function 3201 * for a single hardware must be synchronized against each other. Calls to 3202 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3203 * mixed for a single hardware. Must not run concurrently with 3204 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3205 * 3206 * In process context use instead ieee80211_rx_ni(). 3207 * 3208 * @hw: the hardware this frame came in on 3209 * @skb: the buffer to receive, owned by mac80211 after this call 3210 */ 3211void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 3212 3213/** 3214 * ieee80211_rx_irqsafe - receive frame 3215 * 3216 * Like ieee80211_rx() but can be called in IRQ context 3217 * (internally defers to a tasklet.) 3218 * 3219 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3220 * be mixed for a single hardware.Must not run concurrently with 3221 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3222 * 3223 * @hw: the hardware this frame came in on 3224 * @skb: the buffer to receive, owned by mac80211 after this call 3225 */ 3226void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3227 3228/** 3229 * ieee80211_rx_ni - receive frame (in process context) 3230 * 3231 * Like ieee80211_rx() but can be called in process context 3232 * (internally disables bottom halves). 3233 * 3234 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3235 * not be mixed for a single hardware. Must not run concurrently with 3236 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3237 * 3238 * @hw: the hardware this frame came in on 3239 * @skb: the buffer to receive, owned by mac80211 after this call 3240 */ 3241static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3242 struct sk_buff *skb) 3243{ 3244 local_bh_disable(); 3245 ieee80211_rx(hw, skb); 3246 local_bh_enable(); 3247} 3248 3249/** 3250 * ieee80211_sta_ps_transition - PS transition for connected sta 3251 * 3252 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3253 * flag set, use this function to inform mac80211 about a connected station 3254 * entering/leaving PS mode. 3255 * 3256 * This function may not be called in IRQ context or with softirqs enabled. 3257 * 3258 * Calls to this function for a single hardware must be synchronized against 3259 * each other. 3260 * 3261 * @sta: currently connected sta 3262 * @start: start or stop PS 3263 * 3264 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3265 */ 3266int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3267 3268/** 3269 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3270 * (in process context) 3271 * 3272 * Like ieee80211_sta_ps_transition() but can be called in process context 3273 * (internally disables bottom halves). Concurrent call restriction still 3274 * applies. 3275 * 3276 * @sta: currently connected sta 3277 * @start: start or stop PS 3278 * 3279 * Return: Like ieee80211_sta_ps_transition(). 3280 */ 3281static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3282 bool start) 3283{ 3284 int ret; 3285 3286 local_bh_disable(); 3287 ret = ieee80211_sta_ps_transition(sta, start); 3288 local_bh_enable(); 3289 3290 return ret; 3291} 3292 3293/* 3294 * The TX headroom reserved by mac80211 for its own tx_status functions. 3295 * This is enough for the radiotap header. 3296 */ 3297#define IEEE80211_TX_STATUS_HEADROOM 14 3298 3299/** 3300 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3301 * @sta: &struct ieee80211_sta pointer for the sleeping station 3302 * @tid: the TID that has buffered frames 3303 * @buffered: indicates whether or not frames are buffered for this TID 3304 * 3305 * If a driver buffers frames for a powersave station instead of passing 3306 * them back to mac80211 for retransmission, the station may still need 3307 * to be told that there are buffered frames via the TIM bit. 3308 * 3309 * This function informs mac80211 whether or not there are frames that are 3310 * buffered in the driver for a given TID; mac80211 can then use this data 3311 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3312 * call! Beware of the locking!) 3313 * 3314 * If all frames are released to the station (due to PS-poll or uAPSD) 3315 * then the driver needs to inform mac80211 that there no longer are 3316 * frames buffered. However, when the station wakes up mac80211 assumes 3317 * that all buffered frames will be transmitted and clears this data, 3318 * drivers need to make sure they inform mac80211 about all buffered 3319 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3320 * 3321 * Note that technically mac80211 only needs to know this per AC, not per 3322 * TID, but since driver buffering will inevitably happen per TID (since 3323 * it is related to aggregation) it is easier to make mac80211 map the 3324 * TID to the AC as required instead of keeping track in all drivers that 3325 * use this API. 3326 */ 3327void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3328 u8 tid, bool buffered); 3329 3330/** 3331 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 3332 * 3333 * Call this function in a driver with per-packet rate selection support 3334 * to combine the rate info in the packet tx info with the most recent 3335 * rate selection table for the station entry. 3336 * 3337 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3338 * @sta: the receiver station to which this packet is sent. 3339 * @skb: the frame to be transmitted. 3340 * @dest: buffer for extracted rate/retry information 3341 * @max_rates: maximum number of rates to fetch 3342 */ 3343void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 3344 struct ieee80211_sta *sta, 3345 struct sk_buff *skb, 3346 struct ieee80211_tx_rate *dest, 3347 int max_rates); 3348 3349/** 3350 * ieee80211_tx_status - transmit status callback 3351 * 3352 * Call this function for all transmitted frames after they have been 3353 * transmitted. It is permissible to not call this function for 3354 * multicast frames but this can affect statistics. 3355 * 3356 * This function may not be called in IRQ context. Calls to this function 3357 * for a single hardware must be synchronized against each other. Calls 3358 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3359 * may not be mixed for a single hardware. Must not run concurrently with 3360 * ieee80211_rx() or ieee80211_rx_ni(). 3361 * 3362 * @hw: the hardware the frame was transmitted by 3363 * @skb: the frame that was transmitted, owned by mac80211 after this call 3364 */ 3365void ieee80211_tx_status(struct ieee80211_hw *hw, 3366 struct sk_buff *skb); 3367 3368/** 3369 * ieee80211_tx_status_ni - transmit status callback (in process context) 3370 * 3371 * Like ieee80211_tx_status() but can be called in process context. 3372 * 3373 * Calls to this function, ieee80211_tx_status() and 3374 * ieee80211_tx_status_irqsafe() may not be mixed 3375 * for a single hardware. 3376 * 3377 * @hw: the hardware the frame was transmitted by 3378 * @skb: the frame that was transmitted, owned by mac80211 after this call 3379 */ 3380static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3381 struct sk_buff *skb) 3382{ 3383 local_bh_disable(); 3384 ieee80211_tx_status(hw, skb); 3385 local_bh_enable(); 3386} 3387 3388/** 3389 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3390 * 3391 * Like ieee80211_tx_status() but can be called in IRQ context 3392 * (internally defers to a tasklet.) 3393 * 3394 * Calls to this function, ieee80211_tx_status() and 3395 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3396 * 3397 * @hw: the hardware the frame was transmitted by 3398 * @skb: the frame that was transmitted, owned by mac80211 after this call 3399 */ 3400void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3401 struct sk_buff *skb); 3402 3403/** 3404 * ieee80211_report_low_ack - report non-responding station 3405 * 3406 * When operating in AP-mode, call this function to report a non-responding 3407 * connected STA. 3408 * 3409 * @sta: the non-responding connected sta 3410 * @num_packets: number of packets sent to @sta without a response 3411 */ 3412void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3413 3414#define IEEE80211_MAX_CSA_COUNTERS_NUM 2 3415 3416/** 3417 * struct ieee80211_mutable_offsets - mutable beacon offsets 3418 * @tim_offset: position of TIM element 3419 * @tim_length: size of TIM element 3420 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets 3421 * to CSA counters. This array can contain zero values which 3422 * should be ignored. 3423 */ 3424struct ieee80211_mutable_offsets { 3425 u16 tim_offset; 3426 u16 tim_length; 3427 3428 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; 3429}; 3430 3431/** 3432 * ieee80211_beacon_get_template - beacon template generation function 3433 * @hw: pointer obtained from ieee80211_alloc_hw(). 3434 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3435 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will 3436 * receive the offsets that may be updated by the driver. 3437 * 3438 * If the driver implements beaconing modes, it must use this function to 3439 * obtain the beacon template. 3440 * 3441 * This function should be used if the beacon frames are generated by the 3442 * device, and then the driver must use the returned beacon as the template 3443 * The driver or the device are responsible to update the DTIM and, when 3444 * applicable, the CSA count. 3445 * 3446 * The driver is responsible for freeing the returned skb. 3447 * 3448 * Return: The beacon template. %NULL on error. 3449 */ 3450struct sk_buff * 3451ieee80211_beacon_get_template(struct ieee80211_hw *hw, 3452 struct ieee80211_vif *vif, 3453 struct ieee80211_mutable_offsets *offs); 3454 3455/** 3456 * ieee80211_beacon_get_tim - beacon generation function 3457 * @hw: pointer obtained from ieee80211_alloc_hw(). 3458 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3459 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3460 * Set to 0 if invalid (in non-AP modes). 3461 * @tim_length: pointer to variable that will receive the TIM IE length, 3462 * (including the ID and length bytes!). 3463 * Set to 0 if invalid (in non-AP modes). 3464 * 3465 * If the driver implements beaconing modes, it must use this function to 3466 * obtain the beacon frame. 3467 * 3468 * If the beacon frames are generated by the host system (i.e., not in 3469 * hardware/firmware), the driver uses this function to get each beacon 3470 * frame from mac80211 -- it is responsible for calling this function exactly 3471 * once before the beacon is needed (e.g. based on hardware interrupt). 3472 * 3473 * The driver is responsible for freeing the returned skb. 3474 * 3475 * Return: The beacon template. %NULL on error. 3476 */ 3477struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3478 struct ieee80211_vif *vif, 3479 u16 *tim_offset, u16 *tim_length); 3480 3481/** 3482 * ieee80211_beacon_get - beacon generation function 3483 * @hw: pointer obtained from ieee80211_alloc_hw(). 3484 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3485 * 3486 * See ieee80211_beacon_get_tim(). 3487 * 3488 * Return: See ieee80211_beacon_get_tim(). 3489 */ 3490static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3491 struct ieee80211_vif *vif) 3492{ 3493 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3494} 3495 3496/** 3497 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter 3498 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3499 * 3500 * The csa counter should be updated after each beacon transmission. 3501 * This function is called implicitly when 3502 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the 3503 * beacon frames are generated by the device, the driver should call this 3504 * function after each beacon transmission to sync mac80211's csa counters. 3505 * 3506 * Return: new csa counter value 3507 */ 3508u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif); 3509 3510/** 3511 * ieee80211_csa_finish - notify mac80211 about channel switch 3512 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3513 * 3514 * After a channel switch announcement was scheduled and the counter in this 3515 * announcement hits 1, this function must be called by the driver to 3516 * notify mac80211 that the channel can be changed. 3517 */ 3518void ieee80211_csa_finish(struct ieee80211_vif *vif); 3519 3520/** 3521 * ieee80211_csa_is_complete - find out if counters reached 1 3522 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3523 * 3524 * This function returns whether the channel switch counters reached zero. 3525 */ 3526bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 3527 3528 3529/** 3530 * ieee80211_proberesp_get - retrieve a Probe Response template 3531 * @hw: pointer obtained from ieee80211_alloc_hw(). 3532 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3533 * 3534 * Creates a Probe Response template which can, for example, be uploaded to 3535 * hardware. The destination address should be set by the caller. 3536 * 3537 * Can only be called in AP mode. 3538 * 3539 * Return: The Probe Response template. %NULL on error. 3540 */ 3541struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3542 struct ieee80211_vif *vif); 3543 3544/** 3545 * ieee80211_pspoll_get - retrieve a PS Poll template 3546 * @hw: pointer obtained from ieee80211_alloc_hw(). 3547 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3548 * 3549 * Creates a PS Poll a template which can, for example, uploaded to 3550 * hardware. The template must be updated after association so that correct 3551 * AID, BSSID and MAC address is used. 3552 * 3553 * Note: Caller (or hardware) is responsible for setting the 3554 * &IEEE80211_FCTL_PM bit. 3555 * 3556 * Return: The PS Poll template. %NULL on error. 3557 */ 3558struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3559 struct ieee80211_vif *vif); 3560 3561/** 3562 * ieee80211_nullfunc_get - retrieve a nullfunc template 3563 * @hw: pointer obtained from ieee80211_alloc_hw(). 3564 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3565 * 3566 * Creates a Nullfunc template which can, for example, uploaded to 3567 * hardware. The template must be updated after association so that correct 3568 * BSSID and address is used. 3569 * 3570 * Note: Caller (or hardware) is responsible for setting the 3571 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3572 * 3573 * Return: The nullfunc template. %NULL on error. 3574 */ 3575struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3576 struct ieee80211_vif *vif); 3577 3578/** 3579 * ieee80211_probereq_get - retrieve a Probe Request template 3580 * @hw: pointer obtained from ieee80211_alloc_hw(). 3581 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3582 * @ssid: SSID buffer 3583 * @ssid_len: length of SSID 3584 * @tailroom: tailroom to reserve at end of SKB for IEs 3585 * 3586 * Creates a Probe Request template which can, for example, be uploaded to 3587 * hardware. 3588 * 3589 * Return: The Probe Request template. %NULL on error. 3590 */ 3591struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3592 struct ieee80211_vif *vif, 3593 const u8 *ssid, size_t ssid_len, 3594 size_t tailroom); 3595 3596/** 3597 * ieee80211_rts_get - RTS frame generation function 3598 * @hw: pointer obtained from ieee80211_alloc_hw(). 3599 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3600 * @frame: pointer to the frame that is going to be protected by the RTS. 3601 * @frame_len: the frame length (in octets). 3602 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3603 * @rts: The buffer where to store the RTS frame. 3604 * 3605 * If the RTS frames are generated by the host system (i.e., not in 3606 * hardware/firmware), the low-level driver uses this function to receive 3607 * the next RTS frame from the 802.11 code. The low-level is responsible 3608 * for calling this function before and RTS frame is needed. 3609 */ 3610void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3611 const void *frame, size_t frame_len, 3612 const struct ieee80211_tx_info *frame_txctl, 3613 struct ieee80211_rts *rts); 3614 3615/** 3616 * ieee80211_rts_duration - Get the duration field for an RTS frame 3617 * @hw: pointer obtained from ieee80211_alloc_hw(). 3618 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3619 * @frame_len: the length of the frame that is going to be protected by the RTS. 3620 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3621 * 3622 * If the RTS is generated in firmware, but the host system must provide 3623 * the duration field, the low-level driver uses this function to receive 3624 * the duration field value in little-endian byteorder. 3625 * 3626 * Return: The duration. 3627 */ 3628__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3629 struct ieee80211_vif *vif, size_t frame_len, 3630 const struct ieee80211_tx_info *frame_txctl); 3631 3632/** 3633 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3634 * @hw: pointer obtained from ieee80211_alloc_hw(). 3635 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3636 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3637 * @frame_len: the frame length (in octets). 3638 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3639 * @cts: The buffer where to store the CTS-to-self frame. 3640 * 3641 * If the CTS-to-self frames are generated by the host system (i.e., not in 3642 * hardware/firmware), the low-level driver uses this function to receive 3643 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3644 * for calling this function before and CTS-to-self frame is needed. 3645 */ 3646void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3647 struct ieee80211_vif *vif, 3648 const void *frame, size_t frame_len, 3649 const struct ieee80211_tx_info *frame_txctl, 3650 struct ieee80211_cts *cts); 3651 3652/** 3653 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3654 * @hw: pointer obtained from ieee80211_alloc_hw(). 3655 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3656 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3657 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3658 * 3659 * If the CTS-to-self is generated in firmware, but the host system must provide 3660 * the duration field, the low-level driver uses this function to receive 3661 * the duration field value in little-endian byteorder. 3662 * 3663 * Return: The duration. 3664 */ 3665__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3666 struct ieee80211_vif *vif, 3667 size_t frame_len, 3668 const struct ieee80211_tx_info *frame_txctl); 3669 3670/** 3671 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3672 * @hw: pointer obtained from ieee80211_alloc_hw(). 3673 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3674 * @band: the band to calculate the frame duration on 3675 * @frame_len: the length of the frame. 3676 * @rate: the rate at which the frame is going to be transmitted. 3677 * 3678 * Calculate the duration field of some generic frame, given its 3679 * length and transmission rate (in 100kbps). 3680 * 3681 * Return: The duration. 3682 */ 3683__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3684 struct ieee80211_vif *vif, 3685 enum ieee80211_band band, 3686 size_t frame_len, 3687 struct ieee80211_rate *rate); 3688 3689/** 3690 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3691 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3692 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3693 * 3694 * Function for accessing buffered broadcast and multicast frames. If 3695 * hardware/firmware does not implement buffering of broadcast/multicast 3696 * frames when power saving is used, 802.11 code buffers them in the host 3697 * memory. The low-level driver uses this function to fetch next buffered 3698 * frame. In most cases, this is used when generating beacon frame. 3699 * 3700 * Return: A pointer to the next buffered skb or NULL if no more buffered 3701 * frames are available. 3702 * 3703 * Note: buffered frames are returned only after DTIM beacon frame was 3704 * generated with ieee80211_beacon_get() and the low-level driver must thus 3705 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3706 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3707 * does not need to check for DTIM beacons separately and should be able to 3708 * use common code for all beacons. 3709 */ 3710struct sk_buff * 3711ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3712 3713/** 3714 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3715 * 3716 * This function returns the TKIP phase 1 key for the given IV32. 3717 * 3718 * @keyconf: the parameter passed with the set key 3719 * @iv32: IV32 to get the P1K for 3720 * @p1k: a buffer to which the key will be written, as 5 u16 values 3721 */ 3722void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3723 u32 iv32, u16 *p1k); 3724 3725/** 3726 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3727 * 3728 * This function returns the TKIP phase 1 key for the IV32 taken 3729 * from the given packet. 3730 * 3731 * @keyconf: the parameter passed with the set key 3732 * @skb: the packet to take the IV32 value from that will be encrypted 3733 * with this P1K 3734 * @p1k: a buffer to which the key will be written, as 5 u16 values 3735 */ 3736static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3737 struct sk_buff *skb, u16 *p1k) 3738{ 3739 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3740 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3741 u32 iv32 = get_unaligned_le32(&data[4]); 3742 3743 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3744} 3745 3746/** 3747 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3748 * 3749 * This function returns the TKIP phase 1 key for the given IV32 3750 * and transmitter address. 3751 * 3752 * @keyconf: the parameter passed with the set key 3753 * @ta: TA that will be used with the key 3754 * @iv32: IV32 to get the P1K for 3755 * @p1k: a buffer to which the key will be written, as 5 u16 values 3756 */ 3757void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3758 const u8 *ta, u32 iv32, u16 *p1k); 3759 3760/** 3761 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3762 * 3763 * This function computes the TKIP RC4 key for the IV values 3764 * in the packet. 3765 * 3766 * @keyconf: the parameter passed with the set key 3767 * @skb: the packet to take the IV32/IV16 values from that will be 3768 * encrypted with this key 3769 * @p2k: a buffer to which the key will be written, 16 bytes 3770 */ 3771void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3772 struct sk_buff *skb, u8 *p2k); 3773 3774/** 3775 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3776 * 3777 * This function computes the two AES-CMAC sub-keys, based on the 3778 * previously installed master key. 3779 * 3780 * @keyconf: the parameter passed with the set key 3781 * @k1: a buffer to be filled with the 1st sub-key 3782 * @k2: a buffer to be filled with the 2nd sub-key 3783 */ 3784void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3785 u8 *k1, u8 *k2); 3786 3787/** 3788 * struct ieee80211_key_seq - key sequence counter 3789 * 3790 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3791 * @ccmp: PN data, most significant byte first (big endian, 3792 * reverse order than in packet) 3793 * @aes_cmac: PN data, most significant byte first (big endian, 3794 * reverse order than in packet) 3795 */ 3796struct ieee80211_key_seq { 3797 union { 3798 struct { 3799 u32 iv32; 3800 u16 iv16; 3801 } tkip; 3802 struct { 3803 u8 pn[6]; 3804 } ccmp; 3805 struct { 3806 u8 pn[6]; 3807 } aes_cmac; 3808 }; 3809}; 3810 3811/** 3812 * ieee80211_get_key_tx_seq - get key TX sequence counter 3813 * 3814 * @keyconf: the parameter passed with the set key 3815 * @seq: buffer to receive the sequence data 3816 * 3817 * This function allows a driver to retrieve the current TX IV/PN 3818 * for the given key. It must not be called if IV generation is 3819 * offloaded to the device. 3820 * 3821 * Note that this function may only be called when no TX processing 3822 * can be done concurrently, for example when queues are stopped 3823 * and the stop has been synchronized. 3824 */ 3825void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3826 struct ieee80211_key_seq *seq); 3827 3828/** 3829 * ieee80211_get_key_rx_seq - get key RX sequence counter 3830 * 3831 * @keyconf: the parameter passed with the set key 3832 * @tid: The TID, or -1 for the management frame value (CCMP only); 3833 * the value on TID 0 is also used for non-QoS frames. For 3834 * CMAC, only TID 0 is valid. 3835 * @seq: buffer to receive the sequence data 3836 * 3837 * This function allows a driver to retrieve the current RX IV/PNs 3838 * for the given key. It must not be called if IV checking is done 3839 * by the device and not by mac80211. 3840 * 3841 * Note that this function may only be called when no RX processing 3842 * can be done concurrently. 3843 */ 3844void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3845 int tid, struct ieee80211_key_seq *seq); 3846 3847/** 3848 * ieee80211_set_key_tx_seq - set key TX sequence counter 3849 * 3850 * @keyconf: the parameter passed with the set key 3851 * @seq: new sequence data 3852 * 3853 * This function allows a driver to set the current TX IV/PNs for the 3854 * given key. This is useful when resuming from WoWLAN sleep and the 3855 * device may have transmitted frames using the PTK, e.g. replies to 3856 * ARP requests. 3857 * 3858 * Note that this function may only be called when no TX processing 3859 * can be done concurrently. 3860 */ 3861void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf, 3862 struct ieee80211_key_seq *seq); 3863 3864/** 3865 * ieee80211_set_key_rx_seq - set key RX sequence counter 3866 * 3867 * @keyconf: the parameter passed with the set key 3868 * @tid: The TID, or -1 for the management frame value (CCMP only); 3869 * the value on TID 0 is also used for non-QoS frames. For 3870 * CMAC, only TID 0 is valid. 3871 * @seq: new sequence data 3872 * 3873 * This function allows a driver to set the current RX IV/PNs for the 3874 * given key. This is useful when resuming from WoWLAN sleep and GTK 3875 * rekey may have been done while suspended. It should not be called 3876 * if IV checking is done by the device and not by mac80211. 3877 * 3878 * Note that this function may only be called when no RX processing 3879 * can be done concurrently. 3880 */ 3881void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 3882 int tid, struct ieee80211_key_seq *seq); 3883 3884/** 3885 * ieee80211_remove_key - remove the given key 3886 * @keyconf: the parameter passed with the set key 3887 * 3888 * Remove the given key. If the key was uploaded to the hardware at the 3889 * time this function is called, it is not deleted in the hardware but 3890 * instead assumed to have been removed already. 3891 * 3892 * Note that due to locking considerations this function can (currently) 3893 * only be called during key iteration (ieee80211_iter_keys().) 3894 */ 3895void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 3896 3897/** 3898 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 3899 * @vif: the virtual interface to add the key on 3900 * @keyconf: new key data 3901 * 3902 * When GTK rekeying was done while the system was suspended, (a) new 3903 * key(s) will be available. These will be needed by mac80211 for proper 3904 * RX processing, so this function allows setting them. 3905 * 3906 * The function returns the newly allocated key structure, which will 3907 * have similar contents to the passed key configuration but point to 3908 * mac80211-owned memory. In case of errors, the function returns an 3909 * ERR_PTR(), use IS_ERR() etc. 3910 * 3911 * Note that this function assumes the key isn't added to hardware 3912 * acceleration, so no TX will be done with the key. Since it's a GTK 3913 * on managed (station) networks, this is true anyway. If the driver 3914 * calls this function from the resume callback and subsequently uses 3915 * the return code 1 to reconfigure the device, this key will be part 3916 * of the reconfiguration. 3917 * 3918 * Note that the driver should also call ieee80211_set_key_rx_seq() 3919 * for the new key for each TID to set up sequence counters properly. 3920 * 3921 * IMPORTANT: If this replaces a key that is present in the hardware, 3922 * then it will attempt to remove it during this call. In many cases 3923 * this isn't what you want, so call ieee80211_remove_key() first for 3924 * the key that's being replaced. 3925 */ 3926struct ieee80211_key_conf * 3927ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 3928 struct ieee80211_key_conf *keyconf); 3929 3930/** 3931 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3932 * @vif: virtual interface the rekeying was done on 3933 * @bssid: The BSSID of the AP, for checking association 3934 * @replay_ctr: the new replay counter after GTK rekeying 3935 * @gfp: allocation flags 3936 */ 3937void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3938 const u8 *replay_ctr, gfp_t gfp); 3939 3940/** 3941 * ieee80211_wake_queue - wake specific queue 3942 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3943 * @queue: queue number (counted from zero). 3944 * 3945 * Drivers should use this function instead of netif_wake_queue. 3946 */ 3947void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3948 3949/** 3950 * ieee80211_stop_queue - stop specific queue 3951 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3952 * @queue: queue number (counted from zero). 3953 * 3954 * Drivers should use this function instead of netif_stop_queue. 3955 */ 3956void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3957 3958/** 3959 * ieee80211_queue_stopped - test status of the queue 3960 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3961 * @queue: queue number (counted from zero). 3962 * 3963 * Drivers should use this function instead of netif_stop_queue. 3964 * 3965 * Return: %true if the queue is stopped. %false otherwise. 3966 */ 3967 3968int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3969 3970/** 3971 * ieee80211_stop_queues - stop all queues 3972 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3973 * 3974 * Drivers should use this function instead of netif_stop_queue. 3975 */ 3976void ieee80211_stop_queues(struct ieee80211_hw *hw); 3977 3978/** 3979 * ieee80211_wake_queues - wake all queues 3980 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3981 * 3982 * Drivers should use this function instead of netif_wake_queue. 3983 */ 3984void ieee80211_wake_queues(struct ieee80211_hw *hw); 3985 3986/** 3987 * ieee80211_scan_completed - completed hardware scan 3988 * 3989 * When hardware scan offload is used (i.e. the hw_scan() callback is 3990 * assigned) this function needs to be called by the driver to notify 3991 * mac80211 that the scan finished. This function can be called from 3992 * any context, including hardirq context. 3993 * 3994 * @hw: the hardware that finished the scan 3995 * @aborted: set to true if scan was aborted 3996 */ 3997void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3998 3999/** 4000 * ieee80211_sched_scan_results - got results from scheduled scan 4001 * 4002 * When a scheduled scan is running, this function needs to be called by the 4003 * driver whenever there are new scan results available. 4004 * 4005 * @hw: the hardware that is performing scheduled scans 4006 */ 4007void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 4008 4009/** 4010 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 4011 * 4012 * When a scheduled scan is running, this function can be called by 4013 * the driver if it needs to stop the scan to perform another task. 4014 * Usual scenarios are drivers that cannot continue the scheduled scan 4015 * while associating, for instance. 4016 * 4017 * @hw: the hardware that is performing scheduled scans 4018 */ 4019void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 4020 4021/** 4022 * enum ieee80211_interface_iteration_flags - interface iteration flags 4023 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 4024 * been added to the driver; However, note that during hardware 4025 * reconfiguration (after restart_hw) it will iterate over a new 4026 * interface and over all the existing interfaces even if they 4027 * haven't been re-added to the driver yet. 4028 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 4029 * interfaces, even if they haven't been re-added to the driver yet. 4030 */ 4031enum ieee80211_interface_iteration_flags { 4032 IEEE80211_IFACE_ITER_NORMAL = 0, 4033 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 4034}; 4035 4036/** 4037 * ieee80211_iterate_active_interfaces - iterate active interfaces 4038 * 4039 * This function iterates over the interfaces associated with a given 4040 * hardware that are currently active and calls the callback for them. 4041 * This function allows the iterator function to sleep, when the iterator 4042 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 4043 * be used. 4044 * Does not iterate over a new interface during add_interface(). 4045 * 4046 * @hw: the hardware struct of which the interfaces should be iterated over 4047 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4048 * @iterator: the iterator function to call 4049 * @data: first argument of the iterator function 4050 */ 4051void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 4052 u32 iter_flags, 4053 void (*iterator)(void *data, u8 *mac, 4054 struct ieee80211_vif *vif), 4055 void *data); 4056 4057/** 4058 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 4059 * 4060 * This function iterates over the interfaces associated with a given 4061 * hardware that are currently active and calls the callback for them. 4062 * This function requires the iterator callback function to be atomic, 4063 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4064 * Does not iterate over a new interface during add_interface(). 4065 * 4066 * @hw: the hardware struct of which the interfaces should be iterated over 4067 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4068 * @iterator: the iterator function to call, cannot sleep 4069 * @data: first argument of the iterator function 4070 */ 4071void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4072 u32 iter_flags, 4073 void (*iterator)(void *data, 4074 u8 *mac, 4075 struct ieee80211_vif *vif), 4076 void *data); 4077 4078/** 4079 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4080 * 4081 * This function iterates over the interfaces associated with a given 4082 * hardware that are currently active and calls the callback for them. 4083 * This version can only be used while holding the RTNL. 4084 * 4085 * @hw: the hardware struct of which the interfaces should be iterated over 4086 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4087 * @iterator: the iterator function to call, cannot sleep 4088 * @data: first argument of the iterator function 4089 */ 4090void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4091 u32 iter_flags, 4092 void (*iterator)(void *data, 4093 u8 *mac, 4094 struct ieee80211_vif *vif), 4095 void *data); 4096 4097/** 4098 * ieee80211_queue_work - add work onto the mac80211 workqueue 4099 * 4100 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4101 * This helper ensures drivers are not queueing work when they should not be. 4102 * 4103 * @hw: the hardware struct for the interface we are adding work for 4104 * @work: the work we want to add onto the mac80211 workqueue 4105 */ 4106void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4107 4108/** 4109 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4110 * 4111 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4112 * workqueue. 4113 * 4114 * @hw: the hardware struct for the interface we are adding work for 4115 * @dwork: delayable work to queue onto the mac80211 workqueue 4116 * @delay: number of jiffies to wait before queueing 4117 */ 4118void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4119 struct delayed_work *dwork, 4120 unsigned long delay); 4121 4122/** 4123 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4124 * @sta: the station for which to start a BA session 4125 * @tid: the TID to BA on. 4126 * @timeout: session timeout value (in TUs) 4127 * 4128 * Return: success if addBA request was sent, failure otherwise 4129 * 4130 * Although mac80211/low level driver/user space application can estimate 4131 * the need to start aggregation on a certain RA/TID, the session level 4132 * will be managed by the mac80211. 4133 */ 4134int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4135 u16 timeout); 4136 4137/** 4138 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4139 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4140 * @ra: receiver address of the BA session recipient. 4141 * @tid: the TID to BA on. 4142 * 4143 * This function must be called by low level driver once it has 4144 * finished with preparations for the BA session. It can be called 4145 * from any context. 4146 */ 4147void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4148 u16 tid); 4149 4150/** 4151 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4152 * @sta: the station whose BA session to stop 4153 * @tid: the TID to stop BA. 4154 * 4155 * Return: negative error if the TID is invalid, or no aggregation active 4156 * 4157 * Although mac80211/low level driver/user space application can estimate 4158 * the need to stop aggregation on a certain RA/TID, the session level 4159 * will be managed by the mac80211. 4160 */ 4161int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4162 4163/** 4164 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4165 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4166 * @ra: receiver address of the BA session recipient. 4167 * @tid: the desired TID to BA on. 4168 * 4169 * This function must be called by low level driver once it has 4170 * finished with preparations for the BA session tear down. It 4171 * can be called from any context. 4172 */ 4173void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4174 u16 tid); 4175 4176/** 4177 * ieee80211_find_sta - find a station 4178 * 4179 * @vif: virtual interface to look for station on 4180 * @addr: station's address 4181 * 4182 * Return: The station, if found. %NULL otherwise. 4183 * 4184 * Note: This function must be called under RCU lock and the 4185 * resulting pointer is only valid under RCU lock as well. 4186 */ 4187struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4188 const u8 *addr); 4189 4190/** 4191 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4192 * 4193 * @hw: pointer as obtained from ieee80211_alloc_hw() 4194 * @addr: remote station's address 4195 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4196 * 4197 * Return: The station, if found. %NULL otherwise. 4198 * 4199 * Note: This function must be called under RCU lock and the 4200 * resulting pointer is only valid under RCU lock as well. 4201 * 4202 * NOTE: You may pass NULL for localaddr, but then you will just get 4203 * the first STA that matches the remote address 'addr'. 4204 * We can have multiple STA associated with multiple 4205 * logical stations (e.g. consider a station connecting to another 4206 * BSSID on the same AP hardware without disconnecting first). 4207 * In this case, the result of this method with localaddr NULL 4208 * is not reliable. 4209 * 4210 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4211 */ 4212struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4213 const u8 *addr, 4214 const u8 *localaddr); 4215 4216/** 4217 * ieee80211_sta_block_awake - block station from waking up 4218 * @hw: the hardware 4219 * @pubsta: the station 4220 * @block: whether to block or unblock 4221 * 4222 * Some devices require that all frames that are on the queues 4223 * for a specific station that went to sleep are flushed before 4224 * a poll response or frames after the station woke up can be 4225 * delivered to that it. Note that such frames must be rejected 4226 * by the driver as filtered, with the appropriate status flag. 4227 * 4228 * This function allows implementing this mode in a race-free 4229 * manner. 4230 * 4231 * To do this, a driver must keep track of the number of frames 4232 * still enqueued for a specific station. If this number is not 4233 * zero when the station goes to sleep, the driver must call 4234 * this function to force mac80211 to consider the station to 4235 * be asleep regardless of the station's actual state. Once the 4236 * number of outstanding frames reaches zero, the driver must 4237 * call this function again to unblock the station. That will 4238 * cause mac80211 to be able to send ps-poll responses, and if 4239 * the station queried in the meantime then frames will also 4240 * be sent out as a result of this. Additionally, the driver 4241 * will be notified that the station woke up some time after 4242 * it is unblocked, regardless of whether the station actually 4243 * woke up while blocked or not. 4244 */ 4245void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4246 struct ieee80211_sta *pubsta, bool block); 4247 4248/** 4249 * ieee80211_sta_eosp - notify mac80211 about end of SP 4250 * @pubsta: the station 4251 * 4252 * When a device transmits frames in a way that it can't tell 4253 * mac80211 in the TX status about the EOSP, it must clear the 4254 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 4255 * This applies for PS-Poll as well as uAPSD. 4256 * 4257 * Note that just like with _tx_status() and _rx() drivers must 4258 * not mix calls to irqsafe/non-irqsafe versions, this function 4259 * must not be mixed with those either. Use the all irqsafe, or 4260 * all non-irqsafe, don't mix! 4261 * 4262 * NB: the _irqsafe version of this function doesn't exist, no 4263 * driver needs it right now. Don't call this function if 4264 * you'd need the _irqsafe version, look at the git history 4265 * and restore the _irqsafe version! 4266 */ 4267void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 4268 4269/** 4270 * ieee80211_iter_keys - iterate keys programmed into the device 4271 * @hw: pointer obtained from ieee80211_alloc_hw() 4272 * @vif: virtual interface to iterate, may be %NULL for all 4273 * @iter: iterator function that will be called for each key 4274 * @iter_data: custom data to pass to the iterator function 4275 * 4276 * This function can be used to iterate all the keys known to 4277 * mac80211, even those that weren't previously programmed into 4278 * the device. This is intended for use in WoWLAN if the device 4279 * needs reprogramming of the keys during suspend. Note that due 4280 * to locking reasons, it is also only safe to call this at few 4281 * spots since it must hold the RTNL and be able to sleep. 4282 * 4283 * The order in which the keys are iterated matches the order 4284 * in which they were originally installed and handed to the 4285 * set_key callback. 4286 */ 4287void ieee80211_iter_keys(struct ieee80211_hw *hw, 4288 struct ieee80211_vif *vif, 4289 void (*iter)(struct ieee80211_hw *hw, 4290 struct ieee80211_vif *vif, 4291 struct ieee80211_sta *sta, 4292 struct ieee80211_key_conf *key, 4293 void *data), 4294 void *iter_data); 4295 4296/** 4297 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 4298 * @hw: pointre obtained from ieee80211_alloc_hw(). 4299 * @iter: iterator function 4300 * @iter_data: data passed to iterator function 4301 * 4302 * Iterate all active channel contexts. This function is atomic and 4303 * doesn't acquire any locks internally that might be held in other 4304 * places while calling into the driver. 4305 * 4306 * The iterator will not find a context that's being added (during 4307 * the driver callback to add it) but will find it while it's being 4308 * removed. 4309 * 4310 * Note that during hardware restart, all contexts that existed 4311 * before the restart are considered already present so will be 4312 * found while iterating, whether they've been re-added already 4313 * or not. 4314 */ 4315void ieee80211_iter_chan_contexts_atomic( 4316 struct ieee80211_hw *hw, 4317 void (*iter)(struct ieee80211_hw *hw, 4318 struct ieee80211_chanctx_conf *chanctx_conf, 4319 void *data), 4320 void *iter_data); 4321 4322/** 4323 * ieee80211_ap_probereq_get - retrieve a Probe Request template 4324 * @hw: pointer obtained from ieee80211_alloc_hw(). 4325 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4326 * 4327 * Creates a Probe Request template which can, for example, be uploaded to 4328 * hardware. The template is filled with bssid, ssid and supported rate 4329 * information. This function must only be called from within the 4330 * .bss_info_changed callback function and only in managed mode. The function 4331 * is only useful when the interface is associated, otherwise it will return 4332 * %NULL. 4333 * 4334 * Return: The Probe Request template. %NULL on error. 4335 */ 4336struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4337 struct ieee80211_vif *vif); 4338 4339/** 4340 * ieee80211_beacon_loss - inform hardware does not receive beacons 4341 * 4342 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4343 * 4344 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 4345 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 4346 * hardware is not receiving beacons with this function. 4347 */ 4348void ieee80211_beacon_loss(struct ieee80211_vif *vif); 4349 4350/** 4351 * ieee80211_connection_loss - inform hardware has lost connection to the AP 4352 * 4353 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4354 * 4355 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 4356 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 4357 * needs to inform if the connection to the AP has been lost. 4358 * The function may also be called if the connection needs to be terminated 4359 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 4360 * 4361 * This function will cause immediate change to disassociated state, 4362 * without connection recovery attempts. 4363 */ 4364void ieee80211_connection_loss(struct ieee80211_vif *vif); 4365 4366/** 4367 * ieee80211_resume_disconnect - disconnect from AP after resume 4368 * 4369 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4370 * 4371 * Instructs mac80211 to disconnect from the AP after resume. 4372 * Drivers can use this after WoWLAN if they know that the 4373 * connection cannot be kept up, for example because keys were 4374 * used while the device was asleep but the replay counters or 4375 * similar cannot be retrieved from the device during resume. 4376 * 4377 * Note that due to implementation issues, if the driver uses 4378 * the reconfiguration functionality during resume the interface 4379 * will still be added as associated first during resume and then 4380 * disconnect normally later. 4381 * 4382 * This function can only be called from the resume callback and 4383 * the driver must not be holding any of its own locks while it 4384 * calls this function, or at least not any locks it needs in the 4385 * key configuration paths (if it supports HW crypto). 4386 */ 4387void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 4388 4389/** 4390 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 4391 * rssi threshold triggered 4392 * 4393 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4394 * @rssi_event: the RSSI trigger event type 4395 * @gfp: context flags 4396 * 4397 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 4398 * monitoring is configured with an rssi threshold, the driver will inform 4399 * whenever the rssi level reaches the threshold. 4400 */ 4401void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4402 enum nl80211_cqm_rssi_threshold_event rssi_event, 4403 gfp_t gfp); 4404 4405/** 4406 * ieee80211_radar_detected - inform that a radar was detected 4407 * 4408 * @hw: pointer as obtained from ieee80211_alloc_hw() 4409 */ 4410void ieee80211_radar_detected(struct ieee80211_hw *hw); 4411 4412/** 4413 * ieee80211_chswitch_done - Complete channel switch process 4414 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4415 * @success: make the channel switch successful or not 4416 * 4417 * Complete the channel switch post-process: set the new operational channel 4418 * and wake up the suspended queues. 4419 */ 4420void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 4421 4422/** 4423 * ieee80211_request_smps - request SM PS transition 4424 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4425 * @smps_mode: new SM PS mode 4426 * 4427 * This allows the driver to request an SM PS transition in managed 4428 * mode. This is useful when the driver has more information than 4429 * the stack about possible interference, for example by bluetooth. 4430 */ 4431void ieee80211_request_smps(struct ieee80211_vif *vif, 4432 enum ieee80211_smps_mode smps_mode); 4433 4434/** 4435 * ieee80211_ready_on_channel - notification of remain-on-channel start 4436 * @hw: pointer as obtained from ieee80211_alloc_hw() 4437 */ 4438void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4439 4440/** 4441 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4442 * @hw: pointer as obtained from ieee80211_alloc_hw() 4443 */ 4444void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4445 4446/** 4447 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4448 * 4449 * in order not to harm the system performance and user experience, the device 4450 * may request not to allow any rx ba session and tear down existing rx ba 4451 * sessions based on system constraints such as periodic BT activity that needs 4452 * to limit wlan activity (eg.sco or a2dp)." 4453 * in such cases, the intention is to limit the duration of the rx ppdu and 4454 * therefore prevent the peer device to use a-mpdu aggregation. 4455 * 4456 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4457 * @ba_rx_bitmap: Bit map of open rx ba per tid 4458 * @addr: & to bssid mac address 4459 */ 4460void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4461 const u8 *addr); 4462 4463/** 4464 * ieee80211_send_bar - send a BlockAckReq frame 4465 * 4466 * can be used to flush pending frames from the peer's aggregation reorder 4467 * buffer. 4468 * 4469 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4470 * @ra: the peer's destination address 4471 * @tid: the TID of the aggregation session 4472 * @ssn: the new starting sequence number for the receiver 4473 */ 4474void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4475 4476/* Rate control API */ 4477 4478/** 4479 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4480 * 4481 * @hw: The hardware the algorithm is invoked for. 4482 * @sband: The band this frame is being transmitted on. 4483 * @bss_conf: the current BSS configuration 4484 * @skb: the skb that will be transmitted, the control information in it needs 4485 * to be filled in 4486 * @reported_rate: The rate control algorithm can fill this in to indicate 4487 * which rate should be reported to userspace as the current rate and 4488 * used for rate calculations in the mesh network. 4489 * @rts: whether RTS will be used for this frame because it is longer than the 4490 * RTS threshold 4491 * @short_preamble: whether mac80211 will request short-preamble transmission 4492 * if the selected rate supports it 4493 * @max_rate_idx: user-requested maximum (legacy) rate 4494 * (deprecated; this will be removed once drivers get updated to use 4495 * rate_idx_mask) 4496 * @rate_idx_mask: user-requested (legacy) rate mask 4497 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 4498 * @bss: whether this frame is sent out in AP or IBSS mode 4499 */ 4500struct ieee80211_tx_rate_control { 4501 struct ieee80211_hw *hw; 4502 struct ieee80211_supported_band *sband; 4503 struct ieee80211_bss_conf *bss_conf; 4504 struct sk_buff *skb; 4505 struct ieee80211_tx_rate reported_rate; 4506 bool rts, short_preamble; 4507 u8 max_rate_idx; 4508 u32 rate_idx_mask; 4509 u8 *rate_idx_mcs_mask; 4510 bool bss; 4511}; 4512 4513struct rate_control_ops { 4514 const char *name; 4515 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4516 void (*free)(void *priv); 4517 4518 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4519 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4520 struct cfg80211_chan_def *chandef, 4521 struct ieee80211_sta *sta, void *priv_sta); 4522 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4523 struct cfg80211_chan_def *chandef, 4524 struct ieee80211_sta *sta, void *priv_sta, 4525 u32 changed); 4526 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4527 void *priv_sta); 4528 4529 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4530 struct ieee80211_sta *sta, void *priv_sta, 4531 struct sk_buff *skb); 4532 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4533 struct ieee80211_tx_rate_control *txrc); 4534 4535 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4536 struct dentry *dir); 4537 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4538}; 4539 4540static inline int rate_supported(struct ieee80211_sta *sta, 4541 enum ieee80211_band band, 4542 int index) 4543{ 4544 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4545} 4546 4547/** 4548 * rate_control_send_low - helper for drivers for management/no-ack frames 4549 * 4550 * Rate control algorithms that agree to use the lowest rate to 4551 * send management frames and NO_ACK data with the respective hw 4552 * retries should use this in the beginning of their mac80211 get_rate 4553 * callback. If true is returned the rate control can simply return. 4554 * If false is returned we guarantee that sta and sta and priv_sta is 4555 * not null. 4556 * 4557 * Rate control algorithms wishing to do more intelligent selection of 4558 * rate for multicast/broadcast frames may choose to not use this. 4559 * 4560 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4561 * that this may be null. 4562 * @priv_sta: private rate control structure. This may be null. 4563 * @txrc: rate control information we sholud populate for mac80211. 4564 */ 4565bool rate_control_send_low(struct ieee80211_sta *sta, 4566 void *priv_sta, 4567 struct ieee80211_tx_rate_control *txrc); 4568 4569 4570static inline s8 4571rate_lowest_index(struct ieee80211_supported_band *sband, 4572 struct ieee80211_sta *sta) 4573{ 4574 int i; 4575 4576 for (i = 0; i < sband->n_bitrates; i++) 4577 if (rate_supported(sta, sband->band, i)) 4578 return i; 4579 4580 /* warn when we cannot find a rate. */ 4581 WARN_ON_ONCE(1); 4582 4583 /* and return 0 (the lowest index) */ 4584 return 0; 4585} 4586 4587static inline 4588bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4589 struct ieee80211_sta *sta) 4590{ 4591 unsigned int i; 4592 4593 for (i = 0; i < sband->n_bitrates; i++) 4594 if (rate_supported(sta, sband->band, i)) 4595 return true; 4596 return false; 4597} 4598 4599/** 4600 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 4601 * 4602 * When not doing a rate control probe to test rates, rate control should pass 4603 * its rate selection to mac80211. If the driver supports receiving a station 4604 * rate table, it will use it to ensure that frames are always sent based on 4605 * the most recent rate control module decision. 4606 * 4607 * @hw: pointer as obtained from ieee80211_alloc_hw() 4608 * @pubsta: &struct ieee80211_sta pointer to the target destination. 4609 * @rates: new tx rate set to be used for this station. 4610 */ 4611int rate_control_set_rates(struct ieee80211_hw *hw, 4612 struct ieee80211_sta *pubsta, 4613 struct ieee80211_sta_rates *rates); 4614 4615int ieee80211_rate_control_register(const struct rate_control_ops *ops); 4616void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 4617 4618static inline bool 4619conf_is_ht20(struct ieee80211_conf *conf) 4620{ 4621 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 4622} 4623 4624static inline bool 4625conf_is_ht40_minus(struct ieee80211_conf *conf) 4626{ 4627 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4628 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 4629} 4630 4631static inline bool 4632conf_is_ht40_plus(struct ieee80211_conf *conf) 4633{ 4634 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4635 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 4636} 4637 4638static inline bool 4639conf_is_ht40(struct ieee80211_conf *conf) 4640{ 4641 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 4642} 4643 4644static inline bool 4645conf_is_ht(struct ieee80211_conf *conf) 4646{ 4647 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) && 4648 (conf->chandef.width != NL80211_CHAN_WIDTH_10) && 4649 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT); 4650} 4651 4652static inline enum nl80211_iftype 4653ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4654{ 4655 if (p2p) { 4656 switch (type) { 4657 case NL80211_IFTYPE_STATION: 4658 return NL80211_IFTYPE_P2P_CLIENT; 4659 case NL80211_IFTYPE_AP: 4660 return NL80211_IFTYPE_P2P_GO; 4661 default: 4662 break; 4663 } 4664 } 4665 return type; 4666} 4667 4668static inline enum nl80211_iftype 4669ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4670{ 4671 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4672} 4673 4674void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4675 int rssi_min_thold, 4676 int rssi_max_thold); 4677 4678void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4679 4680/** 4681 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4682 * 4683 * @vif: the specified virtual interface 4684 * 4685 * Note: This function assumes that the given vif is valid. 4686 * 4687 * Return: The average RSSI value for the requested interface, or 0 if not 4688 * applicable. 4689 */ 4690int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4691 4692/** 4693 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4694 * @vif: virtual interface 4695 * @wakeup: wakeup reason(s) 4696 * @gfp: allocation flags 4697 * 4698 * See cfg80211_report_wowlan_wakeup(). 4699 */ 4700void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4701 struct cfg80211_wowlan_wakeup *wakeup, 4702 gfp_t gfp); 4703 4704/** 4705 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 4706 * @hw: pointer as obtained from ieee80211_alloc_hw() 4707 * @vif: virtual interface 4708 * @skb: frame to be sent from within the driver 4709 * @band: the band to transmit on 4710 * @sta: optional pointer to get the station to send the frame to 4711 * 4712 * Note: must be called under RCU lock 4713 */ 4714bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 4715 struct ieee80211_vif *vif, struct sk_buff *skb, 4716 int band, struct ieee80211_sta **sta); 4717 4718/** 4719 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 4720 * 4721 * @next_tsf: TSF timestamp of the next absent state change 4722 * @has_next_tsf: next absent state change event pending 4723 * 4724 * @absent: descriptor bitmask, set if GO is currently absent 4725 * 4726 * private: 4727 * 4728 * @count: count fields from the NoA descriptors 4729 * @desc: adjusted data from the NoA 4730 */ 4731struct ieee80211_noa_data { 4732 u32 next_tsf; 4733 bool has_next_tsf; 4734 4735 u8 absent; 4736 4737 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 4738 struct { 4739 u32 start; 4740 u32 duration; 4741 u32 interval; 4742 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 4743}; 4744 4745/** 4746 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 4747 * 4748 * @attr: P2P NoA IE 4749 * @data: NoA tracking data 4750 * @tsf: current TSF timestamp 4751 * 4752 * Return: number of successfully parsed descriptors 4753 */ 4754int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4755 struct ieee80211_noa_data *data, u32 tsf); 4756 4757/** 4758 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 4759 * 4760 * @data: NoA tracking data 4761 * @tsf: current TSF timestamp 4762 */ 4763void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 4764 4765#endif /* MAC80211_H */ 4766