mac80211.h revision c65dd1477b6fe5971489dd8b6e28a07ec277fdd6
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#ifndef MAC80211_H 14#define MAC80211_H 15 16#include <linux/bug.h> 17#include <linux/kernel.h> 18#include <linux/if_ether.h> 19#include <linux/skbuff.h> 20#include <linux/ieee80211.h> 21#include <net/cfg80211.h> 22#include <asm/unaligned.h> 23 24/** 25 * DOC: Introduction 26 * 27 * mac80211 is the Linux stack for 802.11 hardware that implements 28 * only partial functionality in hard- or firmware. This document 29 * defines the interface between mac80211 and low-level hardware 30 * drivers. 31 */ 32 33/** 34 * DOC: Calling mac80211 from interrupts 35 * 36 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 37 * called in hardware interrupt context. The low-level driver must not call any 38 * other functions in hardware interrupt context. If there is a need for such 39 * call, the low-level driver should first ACK the interrupt and perform the 40 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 41 * tasklet function. 42 * 43 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 44 * use the non-IRQ-safe functions! 45 */ 46 47/** 48 * DOC: Warning 49 * 50 * If you're reading this document and not the header file itself, it will 51 * be incomplete because not all documentation has been converted yet. 52 */ 53 54/** 55 * DOC: Frame format 56 * 57 * As a general rule, when frames are passed between mac80211 and the driver, 58 * they start with the IEEE 802.11 header and include the same octets that are 59 * sent over the air except for the FCS which should be calculated by the 60 * hardware. 61 * 62 * There are, however, various exceptions to this rule for advanced features: 63 * 64 * The first exception is for hardware encryption and decryption offload 65 * where the IV/ICV may or may not be generated in hardware. 66 * 67 * Secondly, when the hardware handles fragmentation, the frame handed to 68 * the driver from mac80211 is the MSDU, not the MPDU. 69 * 70 * Finally, for received frames, the driver is able to indicate that it has 71 * filled a radiotap header and put that in front of the frame; if it does 72 * not do so then mac80211 may add this under certain circumstances. 73 */ 74 75/** 76 * DOC: mac80211 workqueue 77 * 78 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 79 * The workqueue is a single threaded workqueue and can only be accessed by 80 * helpers for sanity checking. Drivers must ensure all work added onto the 81 * mac80211 workqueue should be cancelled on the driver stop() callback. 82 * 83 * mac80211 will flushed the workqueue upon interface removal and during 84 * suspend. 85 * 86 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 87 * 88 */ 89 90struct device; 91 92/** 93 * enum ieee80211_max_queues - maximum number of queues 94 * 95 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 96 */ 97enum ieee80211_max_queues { 98 IEEE80211_MAX_QUEUES = 16, 99}; 100 101#define IEEE80211_INVAL_HW_QUEUE 0xff 102 103/** 104 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 105 * @IEEE80211_AC_VO: voice 106 * @IEEE80211_AC_VI: video 107 * @IEEE80211_AC_BE: best effort 108 * @IEEE80211_AC_BK: background 109 */ 110enum ieee80211_ac_numbers { 111 IEEE80211_AC_VO = 0, 112 IEEE80211_AC_VI = 1, 113 IEEE80211_AC_BE = 2, 114 IEEE80211_AC_BK = 3, 115}; 116#define IEEE80211_NUM_ACS 4 117 118/** 119 * struct ieee80211_tx_queue_params - transmit queue configuration 120 * 121 * The information provided in this structure is required for QoS 122 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 123 * 124 * @aifs: arbitration interframe space [0..255] 125 * @cw_min: minimum contention window [a value of the form 126 * 2^n-1 in the range 1..32767] 127 * @cw_max: maximum contention window [like @cw_min] 128 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 129 * @uapsd: is U-APSD mode enabled for the queue 130 */ 131struct ieee80211_tx_queue_params { 132 u16 txop; 133 u16 cw_min; 134 u16 cw_max; 135 u8 aifs; 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 */ 151enum ieee80211_chanctx_change { 152 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 153 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 154}; 155 156/** 157 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 158 * 159 * This is the driver-visible part. The ieee80211_chanctx 160 * that contains it is visible in mac80211 only. 161 * 162 * @def: the channel definition 163 * @rx_chains_static: The number of RX chains that must always be 164 * active on the channel to receive MIMO transmissions 165 * @rx_chains_dynamic: The number of RX chains that must be enabled 166 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 167 * this will always be >= @rx_chains_static. 168 * @drv_priv: data area for driver use, will always be aligned to 169 * sizeof(void *), size is determined in hw information. 170 */ 171struct ieee80211_chanctx_conf { 172 struct cfg80211_chan_def def; 173 174 u8 rx_chains_static, rx_chains_dynamic; 175 176 u8 drv_priv[0] __aligned(sizeof(void *)); 177}; 178 179/** 180 * enum ieee80211_bss_change - BSS change notification flags 181 * 182 * These flags are used with the bss_info_changed() callback 183 * to indicate which BSS parameter changed. 184 * 185 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 186 * also implies a change in the AID. 187 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 188 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 189 * @BSS_CHANGED_ERP_SLOT: slot timing changed 190 * @BSS_CHANGED_HT: 802.11n parameters changed 191 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 192 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 193 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 194 * reason (IBSS and managed mode) 195 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 196 * new beacon (beaconing modes) 197 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 198 * enabled/disabled (beaconing modes) 199 * @BSS_CHANGED_CQM: Connection quality monitor config changed 200 * @BSS_CHANGED_IBSS: IBSS join status changed 201 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 202 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 203 * that it is only ever disabled for station mode. 204 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 205 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 206 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 207 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 208 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 209 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 210 * changed (currently only in P2P client mode, GO mode will be later) 211 * @BSS_CHANGED_DTIM_PERIOD: the DTIM period value was changed (set when 212 * it becomes valid, managed mode only) 213 */ 214enum ieee80211_bss_change { 215 BSS_CHANGED_ASSOC = 1<<0, 216 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 217 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 218 BSS_CHANGED_ERP_SLOT = 1<<3, 219 BSS_CHANGED_HT = 1<<4, 220 BSS_CHANGED_BASIC_RATES = 1<<5, 221 BSS_CHANGED_BEACON_INT = 1<<6, 222 BSS_CHANGED_BSSID = 1<<7, 223 BSS_CHANGED_BEACON = 1<<8, 224 BSS_CHANGED_BEACON_ENABLED = 1<<9, 225 BSS_CHANGED_CQM = 1<<10, 226 BSS_CHANGED_IBSS = 1<<11, 227 BSS_CHANGED_ARP_FILTER = 1<<12, 228 BSS_CHANGED_QOS = 1<<13, 229 BSS_CHANGED_IDLE = 1<<14, 230 BSS_CHANGED_SSID = 1<<15, 231 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 232 BSS_CHANGED_PS = 1<<17, 233 BSS_CHANGED_TXPOWER = 1<<18, 234 BSS_CHANGED_P2P_PS = 1<<19, 235 BSS_CHANGED_DTIM_PERIOD = 1<<20, 236 237 /* when adding here, make sure to change ieee80211_reconfig */ 238}; 239 240/* 241 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 242 * of addresses for an interface increase beyond this value, hardware ARP 243 * filtering will be disabled. 244 */ 245#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 246 247/** 248 * enum ieee80211_rssi_event - RSSI threshold event 249 * An indicator for when RSSI goes below/above a certain threshold. 250 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 251 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 252 */ 253enum ieee80211_rssi_event { 254 RSSI_EVENT_HIGH, 255 RSSI_EVENT_LOW, 256}; 257 258/** 259 * struct ieee80211_bss_conf - holds the BSS's changing parameters 260 * 261 * This structure keeps information about a BSS (and an association 262 * to that BSS) that can change during the lifetime of the BSS. 263 * 264 * @assoc: association status 265 * @ibss_joined: indicates whether this station is part of an IBSS 266 * or not 267 * @ibss_creator: indicates if a new IBSS network is being created 268 * @aid: association ID number, valid only when @assoc is true 269 * @use_cts_prot: use CTS protection 270 * @use_short_preamble: use 802.11b short preamble; 271 * if the hardware cannot handle this it must set the 272 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 273 * @use_short_slot: use short slot time (only relevant for ERP); 274 * if the hardware cannot handle this it must set the 275 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 276 * @dtim_period: num of beacons before the next DTIM, for beaconing, 277 * valid in station mode only if after the driver was notified 278 * with the %BSS_CHANGED_DTIM_PERIOD flag, will be non-zero then. 279 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 280 * as it may have been received during scanning long ago) 281 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 282 * the driver/device can use this to calculate synchronisation 283 * @beacon_int: beacon interval 284 * @assoc_capability: capabilities taken from assoc resp 285 * @basic_rates: bitmap of basic rates, each bit stands for an 286 * index into the rate table configured by the driver in 287 * the current band. 288 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 289 * @bssid: The BSSID for this BSS 290 * @enable_beacon: whether beaconing should be enabled or not 291 * @chandef: Channel definition for this BSS -- the hardware might be 292 * configured a higher bandwidth than this BSS uses, for example. 293 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 294 * This field is only valid when the channel type is one of the HT types. 295 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 296 * implies disabled 297 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 298 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 299 * may filter ARP queries targeted for other addresses than listed here. 300 * The driver must allow ARP queries targeted for all address listed here 301 * to pass through. An empty list implies no ARP queries need to pass. 302 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 303 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 304 * array size), it's up to the driver what to do in that case. 305 * @qos: This is a QoS-enabled BSS. 306 * @idle: This interface is idle. There's also a global idle flag in the 307 * hardware config which may be more appropriate depending on what 308 * your driver/device needs to do. 309 * @ps: power-save mode (STA only). This flag is NOT affected by 310 * offchannel/dynamic_ps operations. 311 * @ssid: The SSID of the current vif. Only valid in AP-mode. 312 * @ssid_len: Length of SSID given in @ssid. 313 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 314 * @txpower: TX power in dBm 315 * @p2p_ctwindow: P2P CTWindow, only for P2P client interfaces 316 * @p2p_oppps: P2P opportunistic PS is enabled 317 */ 318struct ieee80211_bss_conf { 319 const u8 *bssid; 320 /* association related data */ 321 bool assoc, ibss_joined; 322 bool ibss_creator; 323 u16 aid; 324 /* erp related data */ 325 bool use_cts_prot; 326 bool use_short_preamble; 327 bool use_short_slot; 328 bool enable_beacon; 329 u8 dtim_period; 330 u16 beacon_int; 331 u16 assoc_capability; 332 u64 sync_tsf; 333 u32 sync_device_ts; 334 u32 basic_rates; 335 int mcast_rate[IEEE80211_NUM_BANDS]; 336 u16 ht_operation_mode; 337 s32 cqm_rssi_thold; 338 u32 cqm_rssi_hyst; 339 struct cfg80211_chan_def chandef; 340 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 341 int arp_addr_cnt; 342 bool qos; 343 bool idle; 344 bool ps; 345 u8 ssid[IEEE80211_MAX_SSID_LEN]; 346 size_t ssid_len; 347 bool hidden_ssid; 348 int txpower; 349 u8 p2p_ctwindow; 350 bool p2p_oppps; 351}; 352 353/** 354 * enum mac80211_tx_control_flags - flags to describe transmission information/status 355 * 356 * These flags are used with the @flags member of &ieee80211_tx_info. 357 * 358 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 359 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 360 * number to this frame, taking care of not overwriting the fragment 361 * number and increasing the sequence number only when the 362 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 363 * assign sequence numbers to QoS-data frames but cannot do so correctly 364 * for non-QoS-data and management frames because beacons need them from 365 * that counter as well and mac80211 cannot guarantee proper sequencing. 366 * If this flag is set, the driver should instruct the hardware to 367 * assign a sequence number to the frame or assign one itself. Cf. IEEE 368 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 369 * beacons and always be clear for frames without a sequence number field. 370 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 371 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 372 * station 373 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 374 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 375 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 376 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 377 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 378 * because the destination STA was in powersave mode. Note that to 379 * avoid race conditions, the filter must be set by the hardware or 380 * firmware upon receiving a frame that indicates that the station 381 * went to sleep (must be done on device to filter frames already on 382 * the queue) and may only be unset after mac80211 gives the OK for 383 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 384 * since only then is it guaranteed that no more frames are in the 385 * hardware queue. 386 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 387 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 388 * is for the whole aggregation. 389 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 390 * so consider using block ack request (BAR). 391 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 392 * set by rate control algorithms to indicate probe rate, will 393 * be cleared for fragmented frames (except on the last fragment) 394 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 395 * used to indicate that a pending frame requires TX processing before 396 * it can be sent out. 397 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 398 * used to indicate that a frame was already retried due to PS 399 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 400 * used to indicate frame should not be encrypted 401 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 402 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 403 * be sent although the station is in powersave mode. 404 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 405 * transmit function after the current frame, this can be used 406 * by drivers to kick the DMA queue only if unset or when the 407 * queue gets full. 408 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 409 * after TX status because the destination was asleep, it must not 410 * be modified again (no seqno assignment, crypto, etc.) 411 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 412 * MLME command (internal to mac80211 to figure out whether to send TX 413 * status to user space) 414 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 415 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 416 * frame and selects the maximum number of streams that it can use. 417 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 418 * the off-channel channel when a remain-on-channel offload is done 419 * in hardware -- normal packets still flow and are expected to be 420 * handled properly by the device. 421 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 422 * testing. It will be sent out with incorrect Michael MIC key to allow 423 * TKIP countermeasures to be tested. 424 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 425 * This flag is actually used for management frame especially for P2P 426 * frames not being sent at CCK rate in 2GHz band. 427 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 428 * when its status is reported the service period ends. For frames in 429 * an SP that mac80211 transmits, it is already set; for driver frames 430 * the driver may set this flag. It is also used to do the same for 431 * PS-Poll responses. 432 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 433 * This flag is used to send nullfunc frame at minimum rate when 434 * the nullfunc is used for connection monitoring purpose. 435 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 436 * would be fragmented by size (this is optional, only used for 437 * monitor injection). 438 * 439 * Note: If you have to add new flags to the enumeration, then don't 440 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 441 */ 442enum mac80211_tx_control_flags { 443 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 444 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 445 IEEE80211_TX_CTL_NO_ACK = BIT(2), 446 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 447 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 448 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 449 IEEE80211_TX_CTL_AMPDU = BIT(6), 450 IEEE80211_TX_CTL_INJECTED = BIT(7), 451 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 452 IEEE80211_TX_STAT_ACK = BIT(9), 453 IEEE80211_TX_STAT_AMPDU = BIT(10), 454 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 455 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 456 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 457 IEEE80211_TX_INTFL_RETRIED = BIT(15), 458 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 459 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 460 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 461 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 462 /* hole at 20, use later */ 463 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 464 IEEE80211_TX_CTL_LDPC = BIT(22), 465 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 466 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 467 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 468 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 469 IEEE80211_TX_STATUS_EOSP = BIT(28), 470 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 471 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 472}; 473 474#define IEEE80211_TX_CTL_STBC_SHIFT 23 475 476/* 477 * This definition is used as a mask to clear all temporary flags, which are 478 * set by the tx handlers for each transmission attempt by the mac80211 stack. 479 */ 480#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 481 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 482 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 483 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 484 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 485 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 486 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 487 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 488 489/** 490 * enum mac80211_rate_control_flags - per-rate flags set by the 491 * Rate Control algorithm. 492 * 493 * These flags are set by the Rate control algorithm for each rate during tx, 494 * in the @flags member of struct ieee80211_tx_rate. 495 * 496 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 497 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 498 * This is set if the current BSS requires ERP protection. 499 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 500 * @IEEE80211_TX_RC_MCS: HT rate. 501 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 502 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 503 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 504 * Greenfield mode. 505 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 506 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 507 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 508 * (80+80 isn't supported yet) 509 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 510 * adjacent 20 MHz channels, if the current channel type is 511 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 512 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 513 */ 514enum mac80211_rate_control_flags { 515 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 516 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 517 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 518 519 /* rate index is an HT/VHT MCS instead of an index */ 520 IEEE80211_TX_RC_MCS = BIT(3), 521 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 522 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 523 IEEE80211_TX_RC_DUP_DATA = BIT(6), 524 IEEE80211_TX_RC_SHORT_GI = BIT(7), 525 IEEE80211_TX_RC_VHT_MCS = BIT(8), 526 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 527 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 528}; 529 530 531/* there are 40 bytes if you don't need the rateset to be kept */ 532#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 533 534/* if you do need the rateset, then you have less space */ 535#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 536 537/* maximum number of rate stages */ 538#define IEEE80211_TX_MAX_RATES 4 539 540/** 541 * struct ieee80211_tx_rate - rate selection/status 542 * 543 * @idx: rate index to attempt to send with 544 * @flags: rate control flags (&enum mac80211_rate_control_flags) 545 * @count: number of tries in this rate before going to the next rate 546 * 547 * A value of -1 for @idx indicates an invalid rate and, if used 548 * in an array of retry rates, that no more rates should be tried. 549 * 550 * When used for transmit status reporting, the driver should 551 * always report the rate along with the flags it used. 552 * 553 * &struct ieee80211_tx_info contains an array of these structs 554 * in the control information, and it will be filled by the rate 555 * control algorithm according to what should be sent. For example, 556 * if this array contains, in the format { <idx>, <count> } the 557 * information 558 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 559 * then this means that the frame should be transmitted 560 * up to twice at rate 3, up to twice at rate 2, and up to four 561 * times at rate 1 if it doesn't get acknowledged. Say it gets 562 * acknowledged by the peer after the fifth attempt, the status 563 * information should then contain 564 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 565 * since it was transmitted twice at rate 3, twice at rate 2 566 * and once at rate 1 after which we received an acknowledgement. 567 */ 568struct ieee80211_tx_rate { 569 s8 idx; 570 u16 count:5, 571 flags:11; 572} __packed; 573 574#define IEEE80211_MAX_TX_RETRY 31 575 576static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 577 u8 mcs, u8 nss) 578{ 579 WARN_ON(mcs & ~0xF); 580 WARN_ON(nss & ~0x7); 581 rate->idx = (nss << 4) | mcs; 582} 583 584static inline u8 585ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 586{ 587 return rate->idx & 0xF; 588} 589 590static inline u8 591ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 592{ 593 return rate->idx >> 4; 594} 595 596/** 597 * struct ieee80211_tx_info - skb transmit information 598 * 599 * This structure is placed in skb->cb for three uses: 600 * (1) mac80211 TX control - mac80211 tells the driver what to do 601 * (2) driver internal use (if applicable) 602 * (3) TX status information - driver tells mac80211 what happened 603 * 604 * @flags: transmit info flags, defined above 605 * @band: the band to transmit on (use for checking for races) 606 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 607 * @ack_frame_id: internal frame ID for TX status, used internally 608 * @control: union for control data 609 * @status: union for status data 610 * @driver_data: array of driver_data pointers 611 * @ampdu_ack_len: number of acked aggregated frames. 612 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 613 * @ampdu_len: number of aggregated frames. 614 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 615 * @ack_signal: signal strength of the ACK frame 616 */ 617struct ieee80211_tx_info { 618 /* common information */ 619 u32 flags; 620 u8 band; 621 622 u8 hw_queue; 623 624 u16 ack_frame_id; 625 626 union { 627 struct { 628 union { 629 /* rate control */ 630 struct { 631 struct ieee80211_tx_rate rates[ 632 IEEE80211_TX_MAX_RATES]; 633 s8 rts_cts_rate_idx; 634 /* 3 bytes free */ 635 }; 636 /* only needed before rate control */ 637 unsigned long jiffies; 638 }; 639 /* NB: vif can be NULL for injected frames */ 640 struct ieee80211_vif *vif; 641 struct ieee80211_key_conf *hw_key; 642 /* 8 bytes free */ 643 } control; 644 struct { 645 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 646 int ack_signal; 647 u8 ampdu_ack_len; 648 u8 ampdu_len; 649 u8 antenna; 650 /* 21 bytes free */ 651 } status; 652 struct { 653 struct ieee80211_tx_rate driver_rates[ 654 IEEE80211_TX_MAX_RATES]; 655 void *rate_driver_data[ 656 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 657 }; 658 void *driver_data[ 659 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 660 }; 661}; 662 663/** 664 * struct ieee80211_sched_scan_ies - scheduled scan IEs 665 * 666 * This structure is used to pass the appropriate IEs to be used in scheduled 667 * scans for all bands. It contains both the IEs passed from the userspace 668 * and the ones generated by mac80211. 669 * 670 * @ie: array with the IEs for each supported band 671 * @len: array with the total length of the IEs for each band 672 */ 673struct ieee80211_sched_scan_ies { 674 u8 *ie[IEEE80211_NUM_BANDS]; 675 size_t len[IEEE80211_NUM_BANDS]; 676}; 677 678static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 679{ 680 return (struct ieee80211_tx_info *)skb->cb; 681} 682 683static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 684{ 685 return (struct ieee80211_rx_status *)skb->cb; 686} 687 688/** 689 * ieee80211_tx_info_clear_status - clear TX status 690 * 691 * @info: The &struct ieee80211_tx_info to be cleared. 692 * 693 * When the driver passes an skb back to mac80211, it must report 694 * a number of things in TX status. This function clears everything 695 * in the TX status but the rate control information (it does clear 696 * the count since you need to fill that in anyway). 697 * 698 * NOTE: You can only use this function if you do NOT use 699 * info->driver_data! Use info->rate_driver_data 700 * instead if you need only the less space that allows. 701 */ 702static inline void 703ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 704{ 705 int i; 706 707 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 708 offsetof(struct ieee80211_tx_info, control.rates)); 709 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 710 offsetof(struct ieee80211_tx_info, driver_rates)); 711 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 712 /* clear the rate counts */ 713 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 714 info->status.rates[i].count = 0; 715 716 BUILD_BUG_ON( 717 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 718 memset(&info->status.ampdu_ack_len, 0, 719 sizeof(struct ieee80211_tx_info) - 720 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 721} 722 723 724/** 725 * enum mac80211_rx_flags - receive flags 726 * 727 * These flags are used with the @flag member of &struct ieee80211_rx_status. 728 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 729 * Use together with %RX_FLAG_MMIC_STRIPPED. 730 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 731 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 732 * verification has been done by the hardware. 733 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 734 * If this flag is set, the stack cannot do any replay detection 735 * hence the driver or hardware will have to do that. 736 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 737 * the frame. 738 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 739 * the frame. 740 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 741 * field) is valid and contains the time the first symbol of the MPDU 742 * was received. This is useful in monitor mode and for proper IBSS 743 * merging. 744 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 745 * field) is valid and contains the time the last symbol of the MPDU 746 * (including FCS) was received. 747 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 748 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 749 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 750 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 751 * @RX_FLAG_80MHZ: 80 MHz was used 752 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 753 * @RX_FLAG_160MHZ: 160 MHz was used 754 * @RX_FLAG_SHORT_GI: Short guard interval was used 755 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 756 * Valid only for data frames (mainly A-MPDU) 757 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 758 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 759 * to hw.radiotap_mcs_details to advertise that fact 760 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 761 * number (@ampdu_reference) must be populated and be a distinct number for 762 * each A-MPDU 763 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 764 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 765 * monitoring purposes only 766 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 767 * subframes of a single A-MPDU 768 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 769 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 770 * on this subframe 771 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 772 * is stored in the @ampdu_delimiter_crc field) 773 */ 774enum mac80211_rx_flags { 775 RX_FLAG_MMIC_ERROR = BIT(0), 776 RX_FLAG_DECRYPTED = BIT(1), 777 RX_FLAG_MMIC_STRIPPED = BIT(3), 778 RX_FLAG_IV_STRIPPED = BIT(4), 779 RX_FLAG_FAILED_FCS_CRC = BIT(5), 780 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 781 RX_FLAG_MACTIME_START = BIT(7), 782 RX_FLAG_SHORTPRE = BIT(8), 783 RX_FLAG_HT = BIT(9), 784 RX_FLAG_40MHZ = BIT(10), 785 RX_FLAG_SHORT_GI = BIT(11), 786 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 787 RX_FLAG_HT_GF = BIT(13), 788 RX_FLAG_AMPDU_DETAILS = BIT(14), 789 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 790 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 791 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 792 RX_FLAG_AMPDU_IS_LAST = BIT(18), 793 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 794 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 795 RX_FLAG_MACTIME_END = BIT(21), 796 RX_FLAG_VHT = BIT(22), 797 RX_FLAG_80MHZ = BIT(23), 798 RX_FLAG_80P80MHZ = BIT(24), 799 RX_FLAG_160MHZ = BIT(25), 800}; 801 802/** 803 * struct ieee80211_rx_status - receive status 804 * 805 * The low-level driver should provide this information (the subset 806 * supported by hardware) to the 802.11 code with each received 807 * frame, in the skb's control buffer (cb). 808 * 809 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 810 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 811 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 812 * it but can store it and pass it back to the driver for synchronisation 813 * @band: the active band when this frame was received 814 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 815 * @signal: signal strength when receiving this frame, either in dBm, in dB or 816 * unspecified depending on the hardware capabilities flags 817 * @IEEE80211_HW_SIGNAL_* 818 * @antenna: antenna used 819 * @rate_idx: index of data rate into band's supported rates or MCS index if 820 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 821 * @vht_nss: number of streams (VHT only) 822 * @flag: %RX_FLAG_* 823 * @rx_flags: internal RX flags for mac80211 824 * @ampdu_reference: A-MPDU reference number, must be a different value for 825 * each A-MPDU but the same for each subframe within one A-MPDU 826 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 827 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 828 * @vendor_radiotap_len: radiotap vendor namespace length 829 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 830 * that the actual data must be at the start of the SKB data 831 * already. 832 * @vendor_radiotap_oui: radiotap vendor namespace OUI 833 * @vendor_radiotap_subns: radiotap vendor sub namespace 834 */ 835struct ieee80211_rx_status { 836 u64 mactime; 837 u32 device_timestamp; 838 u32 ampdu_reference; 839 u32 flag; 840 u32 vendor_radiotap_bitmap; 841 u16 vendor_radiotap_len; 842 u16 freq; 843 u8 rate_idx; 844 u8 vht_nss; 845 u8 rx_flags; 846 u8 band; 847 u8 antenna; 848 s8 signal; 849 u8 ampdu_delimiter_crc; 850 u8 vendor_radiotap_align; 851 u8 vendor_radiotap_oui[3]; 852 u8 vendor_radiotap_subns; 853}; 854 855/** 856 * enum ieee80211_conf_flags - configuration flags 857 * 858 * Flags to define PHY configuration options 859 * 860 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 861 * to determine for example whether to calculate timestamps for packets 862 * or not, do not use instead of filter flags! 863 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 864 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 865 * meaning that the hardware still wakes up for beacons, is able to 866 * transmit frames and receive the possible acknowledgment frames. 867 * Not to be confused with hardware specific wakeup/sleep states, 868 * driver is responsible for that. See the section "Powersave support" 869 * for more. 870 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 871 * the driver should be prepared to handle configuration requests but 872 * may turn the device off as much as possible. Typically, this flag will 873 * be set when an interface is set UP but not associated or scanning, but 874 * it can also be unset in that case when monitor interfaces are active. 875 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 876 * operating channel. 877 */ 878enum ieee80211_conf_flags { 879 IEEE80211_CONF_MONITOR = (1<<0), 880 IEEE80211_CONF_PS = (1<<1), 881 IEEE80211_CONF_IDLE = (1<<2), 882 IEEE80211_CONF_OFFCHANNEL = (1<<3), 883}; 884 885 886/** 887 * enum ieee80211_conf_changed - denotes which configuration changed 888 * 889 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 890 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 891 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 892 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 893 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 894 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 895 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 896 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 897 * Note that this is only valid if channel contexts are not used, 898 * otherwise each channel context has the number of chains listed. 899 */ 900enum ieee80211_conf_changed { 901 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 902 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 903 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 904 IEEE80211_CONF_CHANGE_PS = BIT(4), 905 IEEE80211_CONF_CHANGE_POWER = BIT(5), 906 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 907 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 908 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 909}; 910 911/** 912 * enum ieee80211_smps_mode - spatial multiplexing power save mode 913 * 914 * @IEEE80211_SMPS_AUTOMATIC: automatic 915 * @IEEE80211_SMPS_OFF: off 916 * @IEEE80211_SMPS_STATIC: static 917 * @IEEE80211_SMPS_DYNAMIC: dynamic 918 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 919 */ 920enum ieee80211_smps_mode { 921 IEEE80211_SMPS_AUTOMATIC, 922 IEEE80211_SMPS_OFF, 923 IEEE80211_SMPS_STATIC, 924 IEEE80211_SMPS_DYNAMIC, 925 926 /* keep last */ 927 IEEE80211_SMPS_NUM_MODES, 928}; 929 930/** 931 * struct ieee80211_conf - configuration of the device 932 * 933 * This struct indicates how the driver shall configure the hardware. 934 * 935 * @flags: configuration flags defined above 936 * 937 * @listen_interval: listen interval in units of beacon interval 938 * @max_sleep_period: the maximum number of beacon intervals to sleep for 939 * before checking the beacon for a TIM bit (managed mode only); this 940 * value will be only achievable between DTIM frames, the hardware 941 * needs to check for the multicast traffic bit in DTIM beacons. 942 * This variable is valid only when the CONF_PS flag is set. 943 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 944 * in power saving. Power saving will not be enabled until a beacon 945 * has been received and the DTIM period is known. 946 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 947 * powersave documentation below. This variable is valid only when 948 * the CONF_PS flag is set. 949 * 950 * @power_level: requested transmit power (in dBm), backward compatibility 951 * value only that is set to the minimum of all interfaces 952 * 953 * @channel: the channel to tune to 954 * @channel_type: the channel (HT) type 955 * 956 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 957 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 958 * but actually means the number of transmissions not the number of retries 959 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 960 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 961 * number of transmissions not the number of retries 962 * 963 * @smps_mode: spatial multiplexing powersave mode; note that 964 * %IEEE80211_SMPS_STATIC is used when the device is not 965 * configured for an HT channel. 966 * Note that this is only valid if channel contexts are not used, 967 * otherwise each channel context has the number of chains listed. 968 */ 969struct ieee80211_conf { 970 u32 flags; 971 int power_level, dynamic_ps_timeout; 972 int max_sleep_period; 973 974 u16 listen_interval; 975 u8 ps_dtim_period; 976 977 u8 long_frame_max_tx_count, short_frame_max_tx_count; 978 979 struct ieee80211_channel *channel; 980 enum nl80211_channel_type channel_type; 981 enum ieee80211_smps_mode smps_mode; 982}; 983 984/** 985 * struct ieee80211_channel_switch - holds the channel switch data 986 * 987 * The information provided in this structure is required for channel switch 988 * operation. 989 * 990 * @timestamp: value in microseconds of the 64-bit Time Synchronization 991 * Function (TSF) timer when the frame containing the channel switch 992 * announcement was received. This is simply the rx.mactime parameter 993 * the driver passed into mac80211. 994 * @block_tx: Indicates whether transmission must be blocked before the 995 * scheduled channel switch, as indicated by the AP. 996 * @channel: the new channel to switch to 997 * @count: the number of TBTT's until the channel switch event 998 */ 999struct ieee80211_channel_switch { 1000 u64 timestamp; 1001 bool block_tx; 1002 struct ieee80211_channel *channel; 1003 u8 count; 1004}; 1005 1006/** 1007 * enum ieee80211_vif_flags - virtual interface flags 1008 * 1009 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1010 * on this virtual interface to avoid unnecessary CPU wakeups 1011 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1012 * monitoring on this virtual interface -- i.e. it can monitor 1013 * connection quality related parameters, such as the RSSI level and 1014 * provide notifications if configured trigger levels are reached. 1015 */ 1016enum ieee80211_vif_flags { 1017 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1018 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1019}; 1020 1021/** 1022 * struct ieee80211_vif - per-interface data 1023 * 1024 * Data in this structure is continually present for driver 1025 * use during the life of a virtual interface. 1026 * 1027 * @type: type of this virtual interface 1028 * @bss_conf: BSS configuration for this interface, either our own 1029 * or the BSS we're associated to 1030 * @addr: address of this interface 1031 * @p2p: indicates whether this AP or STA interface is a p2p 1032 * interface, i.e. a GO or p2p-sta respectively 1033 * @driver_flags: flags/capabilities the driver has for this interface, 1034 * these need to be set (or cleared) when the interface is added 1035 * or, if supported by the driver, the interface type is changed 1036 * at runtime, mac80211 will never touch this field 1037 * @hw_queue: hardware queue for each AC 1038 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1039 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1040 * when it is not assigned. This pointer is RCU-protected due to the TX 1041 * path needing to access it; even though the netdev carrier will always 1042 * be off when it is %NULL there can still be races and packets could be 1043 * processed after it switches back to %NULL. 1044 * @drv_priv: data area for driver use, will always be aligned to 1045 * sizeof(void *). 1046 */ 1047struct ieee80211_vif { 1048 enum nl80211_iftype type; 1049 struct ieee80211_bss_conf bss_conf; 1050 u8 addr[ETH_ALEN]; 1051 bool p2p; 1052 1053 u8 cab_queue; 1054 u8 hw_queue[IEEE80211_NUM_ACS]; 1055 1056 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1057 1058 u32 driver_flags; 1059 1060 /* must be last */ 1061 u8 drv_priv[0] __aligned(sizeof(void *)); 1062}; 1063 1064static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1065{ 1066#ifdef CONFIG_MAC80211_MESH 1067 return vif->type == NL80211_IFTYPE_MESH_POINT; 1068#endif 1069 return false; 1070} 1071 1072/** 1073 * enum ieee80211_key_flags - key flags 1074 * 1075 * These flags are used for communication about keys between the driver 1076 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1077 * 1078 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 1079 * that the STA this key will be used with could be using QoS. 1080 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1081 * driver to indicate that it requires IV generation for this 1082 * particular key. 1083 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1084 * the driver for a TKIP key if it requires Michael MIC 1085 * generation in software. 1086 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1087 * that the key is pairwise rather then a shared key. 1088 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1089 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1090 * be done in software. 1091 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1092 * if space should be prepared for the IV, but the IV 1093 * itself should not be generated. Do not set together with 1094 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1095 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1096 * management frames. The flag can help drivers that have a hardware 1097 * crypto implementation that doesn't deal with management frames 1098 * properly by allowing them to not upload the keys to hardware and 1099 * fall back to software crypto. Note that this flag deals only with 1100 * RX, if your crypto engine can't deal with TX you can also set the 1101 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1102 */ 1103enum ieee80211_key_flags { 1104 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 1105 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1106 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1107 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1108 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1109 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1110 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1111}; 1112 1113/** 1114 * struct ieee80211_key_conf - key information 1115 * 1116 * This key information is given by mac80211 to the driver by 1117 * the set_key() callback in &struct ieee80211_ops. 1118 * 1119 * @hw_key_idx: To be set by the driver, this is the key index the driver 1120 * wants to be given when a frame is transmitted and needs to be 1121 * encrypted in hardware. 1122 * @cipher: The key's cipher suite selector. 1123 * @flags: key flags, see &enum ieee80211_key_flags. 1124 * @keyidx: the key index (0-3) 1125 * @keylen: key material length 1126 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1127 * data block: 1128 * - Temporal Encryption Key (128 bits) 1129 * - Temporal Authenticator Tx MIC Key (64 bits) 1130 * - Temporal Authenticator Rx MIC Key (64 bits) 1131 * @icv_len: The ICV length for this key type 1132 * @iv_len: The IV length for this key type 1133 */ 1134struct ieee80211_key_conf { 1135 u32 cipher; 1136 u8 icv_len; 1137 u8 iv_len; 1138 u8 hw_key_idx; 1139 u8 flags; 1140 s8 keyidx; 1141 u8 keylen; 1142 u8 key[0]; 1143}; 1144 1145/** 1146 * enum set_key_cmd - key command 1147 * 1148 * Used with the set_key() callback in &struct ieee80211_ops, this 1149 * indicates whether a key is being removed or added. 1150 * 1151 * @SET_KEY: a key is set 1152 * @DISABLE_KEY: a key must be disabled 1153 */ 1154enum set_key_cmd { 1155 SET_KEY, DISABLE_KEY, 1156}; 1157 1158/** 1159 * enum ieee80211_sta_state - station state 1160 * 1161 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1162 * this is a special state for add/remove transitions 1163 * @IEEE80211_STA_NONE: station exists without special state 1164 * @IEEE80211_STA_AUTH: station is authenticated 1165 * @IEEE80211_STA_ASSOC: station is associated 1166 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1167 */ 1168enum ieee80211_sta_state { 1169 /* NOTE: These need to be ordered correctly! */ 1170 IEEE80211_STA_NOTEXIST, 1171 IEEE80211_STA_NONE, 1172 IEEE80211_STA_AUTH, 1173 IEEE80211_STA_ASSOC, 1174 IEEE80211_STA_AUTHORIZED, 1175}; 1176 1177/** 1178 * struct ieee80211_sta - station table entry 1179 * 1180 * A station table entry represents a station we are possibly 1181 * communicating with. Since stations are RCU-managed in 1182 * mac80211, any ieee80211_sta pointer you get access to must 1183 * either be protected by rcu_read_lock() explicitly or implicitly, 1184 * or you must take good care to not use such a pointer after a 1185 * call to your sta_remove callback that removed it. 1186 * 1187 * @addr: MAC address 1188 * @aid: AID we assigned to the station if we're an AP 1189 * @supp_rates: Bitmap of supported rates (per band) 1190 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1191 * @vht_cap: VHT capabilities of this STA; Not restricting any capabilities 1192 * of remote STA. Taking as is. 1193 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1194 * @drv_priv: data area for driver use, will always be aligned to 1195 * sizeof(void *), size is determined in hw information. 1196 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1197 * if wme is supported. 1198 * @max_sp: max Service Period. Only valid if wme is supported. 1199 */ 1200struct ieee80211_sta { 1201 u32 supp_rates[IEEE80211_NUM_BANDS]; 1202 u8 addr[ETH_ALEN]; 1203 u16 aid; 1204 struct ieee80211_sta_ht_cap ht_cap; 1205 struct ieee80211_sta_vht_cap vht_cap; 1206 bool wme; 1207 u8 uapsd_queues; 1208 u8 max_sp; 1209 1210 /* must be last */ 1211 u8 drv_priv[0] __aligned(sizeof(void *)); 1212}; 1213 1214/** 1215 * enum sta_notify_cmd - sta notify command 1216 * 1217 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1218 * indicates if an associated station made a power state transition. 1219 * 1220 * @STA_NOTIFY_SLEEP: a station is now sleeping 1221 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1222 */ 1223enum sta_notify_cmd { 1224 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1225}; 1226 1227/** 1228 * struct ieee80211_tx_control - TX control data 1229 * 1230 * @sta: station table entry, this sta pointer may be NULL and 1231 * it is not allowed to copy the pointer, due to RCU. 1232 */ 1233struct ieee80211_tx_control { 1234 struct ieee80211_sta *sta; 1235}; 1236 1237/** 1238 * enum ieee80211_hw_flags - hardware flags 1239 * 1240 * These flags are used to indicate hardware capabilities to 1241 * the stack. Generally, flags here should have their meaning 1242 * done in a way that the simplest hardware doesn't need setting 1243 * any particular flags. There are some exceptions to this rule, 1244 * however, so you are advised to review these flags carefully. 1245 * 1246 * @IEEE80211_HW_HAS_RATE_CONTROL: 1247 * The hardware or firmware includes rate control, and cannot be 1248 * controlled by the stack. As such, no rate control algorithm 1249 * should be instantiated, and the TX rate reported to userspace 1250 * will be taken from the TX status instead of the rate control 1251 * algorithm. 1252 * Note that this requires that the driver implement a number of 1253 * callbacks so it has the correct information, it needs to have 1254 * the @set_rts_threshold callback and must look at the BSS config 1255 * @use_cts_prot for G/N protection, @use_short_slot for slot 1256 * timing in 2.4 GHz and @use_short_preamble for preambles for 1257 * CCK frames. 1258 * 1259 * @IEEE80211_HW_RX_INCLUDES_FCS: 1260 * Indicates that received frames passed to the stack include 1261 * the FCS at the end. 1262 * 1263 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1264 * Some wireless LAN chipsets buffer broadcast/multicast frames 1265 * for power saving stations in the hardware/firmware and others 1266 * rely on the host system for such buffering. This option is used 1267 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1268 * multicast frames when there are power saving stations so that 1269 * the driver can fetch them with ieee80211_get_buffered_bc(). 1270 * 1271 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1272 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1273 * 1274 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1275 * Hardware is not capable of receiving frames with short preamble on 1276 * the 2.4 GHz band. 1277 * 1278 * @IEEE80211_HW_SIGNAL_UNSPEC: 1279 * Hardware can provide signal values but we don't know its units. We 1280 * expect values between 0 and @max_signal. 1281 * If possible please provide dB or dBm instead. 1282 * 1283 * @IEEE80211_HW_SIGNAL_DBM: 1284 * Hardware gives signal values in dBm, decibel difference from 1285 * one milliwatt. This is the preferred method since it is standardized 1286 * between different devices. @max_signal does not need to be set. 1287 * 1288 * @IEEE80211_HW_SPECTRUM_MGMT: 1289 * Hardware supports spectrum management defined in 802.11h 1290 * Measurement, Channel Switch, Quieting, TPC 1291 * 1292 * @IEEE80211_HW_AMPDU_AGGREGATION: 1293 * Hardware supports 11n A-MPDU aggregation. 1294 * 1295 * @IEEE80211_HW_SUPPORTS_PS: 1296 * Hardware has power save support (i.e. can go to sleep). 1297 * 1298 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1299 * Hardware requires nullfunc frame handling in stack, implies 1300 * stack support for dynamic PS. 1301 * 1302 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1303 * Hardware has support for dynamic PS. 1304 * 1305 * @IEEE80211_HW_MFP_CAPABLE: 1306 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1307 * 1308 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1309 * Hardware supports static spatial multiplexing powersave, 1310 * ie. can turn off all but one chain even on HT connections 1311 * that should be using more chains. 1312 * 1313 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1314 * Hardware supports dynamic spatial multiplexing powersave, 1315 * ie. can turn off all but one chain and then wake the rest 1316 * up as required after, for example, rts/cts handshake. 1317 * 1318 * @IEEE80211_HW_SUPPORTS_UAPSD: 1319 * Hardware supports Unscheduled Automatic Power Save Delivery 1320 * (U-APSD) in managed mode. The mode is configured with 1321 * conf_tx() operation. 1322 * 1323 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1324 * Hardware can provide ack status reports of Tx frames to 1325 * the stack. 1326 * 1327 * @IEEE80211_HW_CONNECTION_MONITOR: 1328 * The hardware performs its own connection monitoring, including 1329 * periodic keep-alives to the AP and probing the AP on beacon loss. 1330 * When this flag is set, signaling beacon-loss will cause an immediate 1331 * change to disassociated state. 1332 * 1333 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1334 * This device needs to get data from beacon before association (i.e. 1335 * dtim_period). 1336 * 1337 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1338 * per-station GTKs as used by IBSS RSN or during fast transition. If 1339 * the device doesn't support per-station GTKs, but can be asked not 1340 * to decrypt group addressed frames, then IBSS RSN support is still 1341 * possible but software crypto will be used. Advertise the wiphy flag 1342 * only in that case. 1343 * 1344 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1345 * autonomously manages the PS status of connected stations. When 1346 * this flag is set mac80211 will not trigger PS mode for connected 1347 * stations based on the PM bit of incoming frames. 1348 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1349 * the PS mode of connected stations. 1350 * 1351 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1352 * setup strictly in HW. mac80211 should not attempt to do this in 1353 * software. 1354 * 1355 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1356 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1357 * the scan). 1358 * 1359 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1360 * a virtual monitor interface when monitor interfaces are the only 1361 * active interfaces. 1362 * 1363 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1364 * queue mapping in order to use different queues (not just one per AC) 1365 * for different virtual interfaces. See the doc section on HW queue 1366 * control for more details. 1367 * 1368 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1369 * P2P Interface. This will be honoured even if more than one interface 1370 * is supported. 1371 */ 1372enum ieee80211_hw_flags { 1373 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1374 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1375 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1376 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1377 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1378 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1379 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1380 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1381 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1382 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1383 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1384 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1385 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1386 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1387 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1388 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1389 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1390 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1391 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1392 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1393 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1394 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1395 IEEE80211_HW_AP_LINK_PS = 1<<22, 1396 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1397 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1398 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1399}; 1400 1401/** 1402 * struct ieee80211_hw - hardware information and state 1403 * 1404 * This structure contains the configuration and hardware 1405 * information for an 802.11 PHY. 1406 * 1407 * @wiphy: This points to the &struct wiphy allocated for this 1408 * 802.11 PHY. You must fill in the @perm_addr and @dev 1409 * members of this structure using SET_IEEE80211_DEV() 1410 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1411 * bands (with channels, bitrates) are registered here. 1412 * 1413 * @conf: &struct ieee80211_conf, device configuration, don't use. 1414 * 1415 * @priv: pointer to private area that was allocated for driver use 1416 * along with this structure. 1417 * 1418 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1419 * 1420 * @extra_tx_headroom: headroom to reserve in each transmit skb 1421 * for use by the driver (e.g. for transmit headers.) 1422 * 1423 * @channel_change_time: time (in microseconds) it takes to change channels. 1424 * 1425 * @max_signal: Maximum value for signal (rssi) in RX information, used 1426 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1427 * 1428 * @max_listen_interval: max listen interval in units of beacon interval 1429 * that HW supports 1430 * 1431 * @queues: number of available hardware transmit queues for 1432 * data packets. WMM/QoS requires at least four, these 1433 * queues need to have configurable access parameters. 1434 * 1435 * @rate_control_algorithm: rate control algorithm for this hardware. 1436 * If unset (NULL), the default algorithm will be used. Must be 1437 * set before calling ieee80211_register_hw(). 1438 * 1439 * @vif_data_size: size (in bytes) of the drv_priv data area 1440 * within &struct ieee80211_vif. 1441 * @sta_data_size: size (in bytes) of the drv_priv data area 1442 * within &struct ieee80211_sta. 1443 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1444 * within &struct ieee80211_chanctx_conf. 1445 * 1446 * @max_rates: maximum number of alternate rate retry stages the hw 1447 * can handle. 1448 * @max_report_rates: maximum number of alternate rate retry stages 1449 * the hw can report back. 1450 * @max_rate_tries: maximum number of tries for each stage 1451 * 1452 * @napi_weight: weight used for NAPI polling. You must specify an 1453 * appropriate value here if a napi_poll operation is provided 1454 * by your driver. 1455 * 1456 * @max_rx_aggregation_subframes: maximum buffer size (number of 1457 * sub-frames) to be used for A-MPDU block ack receiver 1458 * aggregation. 1459 * This is only relevant if the device has restrictions on the 1460 * number of subframes, if it relies on mac80211 to do reordering 1461 * it shouldn't be set. 1462 * 1463 * @max_tx_aggregation_subframes: maximum number of subframes in an 1464 * aggregate an HT driver will transmit, used by the peer as a 1465 * hint to size its reorder buffer. 1466 * 1467 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1468 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1469 * 1470 * @radiotap_mcs_details: lists which MCS information can the HW 1471 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1472 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1473 * adding _BW is supported today. 1474 * 1475 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1476 * the default is _GI | _BANDWIDTH. 1477 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1478 * 1479 * @netdev_features: netdev features to be set in each netdev created 1480 * from this HW. Note only HW checksum features are currently 1481 * compatible with mac80211. Other feature bits will be rejected. 1482 */ 1483struct ieee80211_hw { 1484 struct ieee80211_conf conf; 1485 struct wiphy *wiphy; 1486 const char *rate_control_algorithm; 1487 void *priv; 1488 u32 flags; 1489 unsigned int extra_tx_headroom; 1490 int channel_change_time; 1491 int vif_data_size; 1492 int sta_data_size; 1493 int chanctx_data_size; 1494 int napi_weight; 1495 u16 queues; 1496 u16 max_listen_interval; 1497 s8 max_signal; 1498 u8 max_rates; 1499 u8 max_report_rates; 1500 u8 max_rate_tries; 1501 u8 max_rx_aggregation_subframes; 1502 u8 max_tx_aggregation_subframes; 1503 u8 offchannel_tx_hw_queue; 1504 u8 radiotap_mcs_details; 1505 u16 radiotap_vht_details; 1506 netdev_features_t netdev_features; 1507}; 1508 1509/** 1510 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1511 * 1512 * @wiphy: the &struct wiphy which we want to query 1513 * 1514 * mac80211 drivers can use this to get to their respective 1515 * &struct ieee80211_hw. Drivers wishing to get to their own private 1516 * structure can then access it via hw->priv. Note that mac802111 drivers should 1517 * not use wiphy_priv() to try to get their private driver structure as this 1518 * is already used internally by mac80211. 1519 * 1520 * Return: The mac80211 driver hw struct of @wiphy. 1521 */ 1522struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1523 1524/** 1525 * SET_IEEE80211_DEV - set device for 802.11 hardware 1526 * 1527 * @hw: the &struct ieee80211_hw to set the device for 1528 * @dev: the &struct device of this 802.11 device 1529 */ 1530static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1531{ 1532 set_wiphy_dev(hw->wiphy, dev); 1533} 1534 1535/** 1536 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1537 * 1538 * @hw: the &struct ieee80211_hw to set the MAC address for 1539 * @addr: the address to set 1540 */ 1541static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1542{ 1543 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1544} 1545 1546static inline struct ieee80211_rate * 1547ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1548 const struct ieee80211_tx_info *c) 1549{ 1550 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1551 return NULL; 1552 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1553} 1554 1555static inline struct ieee80211_rate * 1556ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1557 const struct ieee80211_tx_info *c) 1558{ 1559 if (c->control.rts_cts_rate_idx < 0) 1560 return NULL; 1561 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1562} 1563 1564static inline struct ieee80211_rate * 1565ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1566 const struct ieee80211_tx_info *c, int idx) 1567{ 1568 if (c->control.rates[idx + 1].idx < 0) 1569 return NULL; 1570 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1571} 1572 1573/** 1574 * ieee80211_free_txskb - free TX skb 1575 * @hw: the hardware 1576 * @skb: the skb 1577 * 1578 * Free a transmit skb. Use this funtion when some failure 1579 * to transmit happened and thus status cannot be reported. 1580 */ 1581void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1582 1583/** 1584 * DOC: Hardware crypto acceleration 1585 * 1586 * mac80211 is capable of taking advantage of many hardware 1587 * acceleration designs for encryption and decryption operations. 1588 * 1589 * The set_key() callback in the &struct ieee80211_ops for a given 1590 * device is called to enable hardware acceleration of encryption and 1591 * decryption. The callback takes a @sta parameter that will be NULL 1592 * for default keys or keys used for transmission only, or point to 1593 * the station information for the peer for individual keys. 1594 * Multiple transmission keys with the same key index may be used when 1595 * VLANs are configured for an access point. 1596 * 1597 * When transmitting, the TX control data will use the @hw_key_idx 1598 * selected by the driver by modifying the &struct ieee80211_key_conf 1599 * pointed to by the @key parameter to the set_key() function. 1600 * 1601 * The set_key() call for the %SET_KEY command should return 0 if 1602 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1603 * added; if you return 0 then hw_key_idx must be assigned to the 1604 * hardware key index, you are free to use the full u8 range. 1605 * 1606 * When the cmd is %DISABLE_KEY then it must succeed. 1607 * 1608 * Note that it is permissible to not decrypt a frame even if a key 1609 * for it has been uploaded to hardware, the stack will not make any 1610 * decision based on whether a key has been uploaded or not but rather 1611 * based on the receive flags. 1612 * 1613 * The &struct ieee80211_key_conf structure pointed to by the @key 1614 * parameter is guaranteed to be valid until another call to set_key() 1615 * removes it, but it can only be used as a cookie to differentiate 1616 * keys. 1617 * 1618 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1619 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1620 * handler. 1621 * The update_tkip_key() call updates the driver with the new phase 1 key. 1622 * This happens every time the iv16 wraps around (every 65536 packets). The 1623 * set_key() call will happen only once for each key (unless the AP did 1624 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1625 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1626 * handler is software decryption with wrap around of iv16. 1627 * 1628 * The set_default_unicast_key() call updates the default WEP key index 1629 * configured to the hardware for WEP encryption type. This is required 1630 * for devices that support offload of data packets (e.g. ARP responses). 1631 */ 1632 1633/** 1634 * DOC: Powersave support 1635 * 1636 * mac80211 has support for various powersave implementations. 1637 * 1638 * First, it can support hardware that handles all powersaving by itself, 1639 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1640 * flag. In that case, it will be told about the desired powersave mode 1641 * with the %IEEE80211_CONF_PS flag depending on the association status. 1642 * The hardware must take care of sending nullfunc frames when necessary, 1643 * i.e. when entering and leaving powersave mode. The hardware is required 1644 * to look at the AID in beacons and signal to the AP that it woke up when 1645 * it finds traffic directed to it. 1646 * 1647 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1648 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1649 * with hardware wakeup and sleep states. Driver is responsible for waking 1650 * up the hardware before issuing commands to the hardware and putting it 1651 * back to sleep at appropriate times. 1652 * 1653 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1654 * buffered multicast/broadcast frames after the beacon. Also it must be 1655 * possible to send frames and receive the acknowledment frame. 1656 * 1657 * Other hardware designs cannot send nullfunc frames by themselves and also 1658 * need software support for parsing the TIM bitmap. This is also supported 1659 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1660 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1661 * required to pass up beacons. The hardware is still required to handle 1662 * waking up for multicast traffic; if it cannot the driver must handle that 1663 * as best as it can, mac80211 is too slow to do that. 1664 * 1665 * Dynamic powersave is an extension to normal powersave in which the 1666 * hardware stays awake for a user-specified period of time after sending a 1667 * frame so that reply frames need not be buffered and therefore delayed to 1668 * the next wakeup. It's compromise of getting good enough latency when 1669 * there's data traffic and still saving significantly power in idle 1670 * periods. 1671 * 1672 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1673 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1674 * flag and mac80211 will handle everything automatically. Additionally, 1675 * hardware having support for the dynamic PS feature may set the 1676 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1677 * dynamic PS mode itself. The driver needs to look at the 1678 * @dynamic_ps_timeout hardware configuration value and use it that value 1679 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1680 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1681 * enabled whenever user has enabled powersave. 1682 * 1683 * Some hardware need to toggle a single shared antenna between WLAN and 1684 * Bluetooth to facilitate co-existence. These types of hardware set 1685 * limitations on the use of host controlled dynamic powersave whenever there 1686 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1687 * driver may request temporarily going into full power save, in order to 1688 * enable toggling the antenna between BT and WLAN. If the driver requests 1689 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1690 * temporarily set to zero until the driver re-enables dynamic powersave. 1691 * 1692 * Driver informs U-APSD client support by enabling 1693 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1694 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1695 * Nullfunc frames and stay awake until the service period has ended. To 1696 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1697 * from that AC are transmitted with powersave enabled. 1698 * 1699 * Note: U-APSD client mode is not yet supported with 1700 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1701 */ 1702 1703/** 1704 * DOC: Beacon filter support 1705 * 1706 * Some hardware have beacon filter support to reduce host cpu wakeups 1707 * which will reduce system power consumption. It usually works so that 1708 * the firmware creates a checksum of the beacon but omits all constantly 1709 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1710 * beacon is forwarded to the host, otherwise it will be just dropped. That 1711 * way the host will only receive beacons where some relevant information 1712 * (for example ERP protection or WMM settings) have changed. 1713 * 1714 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1715 * interface capability. The driver needs to enable beacon filter support 1716 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1717 * power save is enabled, the stack will not check for beacon loss and the 1718 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1719 * 1720 * The time (or number of beacons missed) until the firmware notifies the 1721 * driver of a beacon loss event (which in turn causes the driver to call 1722 * ieee80211_beacon_loss()) should be configurable and will be controlled 1723 * by mac80211 and the roaming algorithm in the future. 1724 * 1725 * Since there may be constantly changing information elements that nothing 1726 * in the software stack cares about, we will, in the future, have mac80211 1727 * tell the driver which information elements are interesting in the sense 1728 * that we want to see changes in them. This will include 1729 * - a list of information element IDs 1730 * - a list of OUIs for the vendor information element 1731 * 1732 * Ideally, the hardware would filter out any beacons without changes in the 1733 * requested elements, but if it cannot support that it may, at the expense 1734 * of some efficiency, filter out only a subset. For example, if the device 1735 * doesn't support checking for OUIs it should pass up all changes in all 1736 * vendor information elements. 1737 * 1738 * Note that change, for the sake of simplification, also includes information 1739 * elements appearing or disappearing from the beacon. 1740 * 1741 * Some hardware supports an "ignore list" instead, just make sure nothing 1742 * that was requested is on the ignore list, and include commonly changing 1743 * information element IDs in the ignore list, for example 11 (BSS load) and 1744 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1745 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1746 * it could also include some currently unused IDs. 1747 * 1748 * 1749 * In addition to these capabilities, hardware should support notifying the 1750 * host of changes in the beacon RSSI. This is relevant to implement roaming 1751 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1752 * the received data packets). This can consist in notifying the host when 1753 * the RSSI changes significantly or when it drops below or rises above 1754 * configurable thresholds. In the future these thresholds will also be 1755 * configured by mac80211 (which gets them from userspace) to implement 1756 * them as the roaming algorithm requires. 1757 * 1758 * If the hardware cannot implement this, the driver should ask it to 1759 * periodically pass beacon frames to the host so that software can do the 1760 * signal strength threshold checking. 1761 */ 1762 1763/** 1764 * DOC: Spatial multiplexing power save 1765 * 1766 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1767 * power in an 802.11n implementation. For details on the mechanism 1768 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1769 * "11.2.3 SM power save". 1770 * 1771 * The mac80211 implementation is capable of sending action frames 1772 * to update the AP about the station's SMPS mode, and will instruct 1773 * the driver to enter the specific mode. It will also announce the 1774 * requested SMPS mode during the association handshake. Hardware 1775 * support for this feature is required, and can be indicated by 1776 * hardware flags. 1777 * 1778 * The default mode will be "automatic", which nl80211/cfg80211 1779 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1780 * turned off otherwise. 1781 * 1782 * To support this feature, the driver must set the appropriate 1783 * hardware support flags, and handle the SMPS flag to the config() 1784 * operation. It will then with this mechanism be instructed to 1785 * enter the requested SMPS mode while associated to an HT AP. 1786 */ 1787 1788/** 1789 * DOC: Frame filtering 1790 * 1791 * mac80211 requires to see many management frames for proper 1792 * operation, and users may want to see many more frames when 1793 * in monitor mode. However, for best CPU usage and power consumption, 1794 * having as few frames as possible percolate through the stack is 1795 * desirable. Hence, the hardware should filter as much as possible. 1796 * 1797 * To achieve this, mac80211 uses filter flags (see below) to tell 1798 * the driver's configure_filter() function which frames should be 1799 * passed to mac80211 and which should be filtered out. 1800 * 1801 * Before configure_filter() is invoked, the prepare_multicast() 1802 * callback is invoked with the parameters @mc_count and @mc_list 1803 * for the combined multicast address list of all virtual interfaces. 1804 * It's use is optional, and it returns a u64 that is passed to 1805 * configure_filter(). Additionally, configure_filter() has the 1806 * arguments @changed_flags telling which flags were changed and 1807 * @total_flags with the new flag states. 1808 * 1809 * If your device has no multicast address filters your driver will 1810 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1811 * parameter to see whether multicast frames should be accepted 1812 * or dropped. 1813 * 1814 * All unsupported flags in @total_flags must be cleared. 1815 * Hardware does not support a flag if it is incapable of _passing_ 1816 * the frame to the stack. Otherwise the driver must ignore 1817 * the flag, but not clear it. 1818 * You must _only_ clear the flag (announce no support for the 1819 * flag to mac80211) if you are not able to pass the packet type 1820 * to the stack (so the hardware always filters it). 1821 * So for example, you should clear @FIF_CONTROL, if your hardware 1822 * always filters control frames. If your hardware always passes 1823 * control frames to the kernel and is incapable of filtering them, 1824 * you do _not_ clear the @FIF_CONTROL flag. 1825 * This rule applies to all other FIF flags as well. 1826 */ 1827 1828/** 1829 * DOC: AP support for powersaving clients 1830 * 1831 * In order to implement AP and P2P GO modes, mac80211 has support for 1832 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1833 * There currently is no support for sAPSD. 1834 * 1835 * There is one assumption that mac80211 makes, namely that a client 1836 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1837 * Both are supported, and both can be used by the same client, but 1838 * they can't be used concurrently by the same client. This simplifies 1839 * the driver code. 1840 * 1841 * The first thing to keep in mind is that there is a flag for complete 1842 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1843 * mac80211 expects the driver to handle most of the state machine for 1844 * powersaving clients and will ignore the PM bit in incoming frames. 1845 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1846 * stations' powersave transitions. In this mode, mac80211 also doesn't 1847 * handle PS-Poll/uAPSD. 1848 * 1849 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1850 * PM bit in incoming frames for client powersave transitions. When a 1851 * station goes to sleep, we will stop transmitting to it. There is, 1852 * however, a race condition: a station might go to sleep while there is 1853 * data buffered on hardware queues. If the device has support for this 1854 * it will reject frames, and the driver should give the frames back to 1855 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1856 * cause mac80211 to retry the frame when the station wakes up. The 1857 * driver is also notified of powersave transitions by calling its 1858 * @sta_notify callback. 1859 * 1860 * When the station is asleep, it has three choices: it can wake up, 1861 * it can PS-Poll, or it can possibly start a uAPSD service period. 1862 * Waking up is implemented by simply transmitting all buffered (and 1863 * filtered) frames to the station. This is the easiest case. When 1864 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1865 * will inform the driver of this with the @allow_buffered_frames 1866 * callback; this callback is optional. mac80211 will then transmit 1867 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1868 * on each frame. The last frame in the service period (or the only 1869 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1870 * indicate that it ends the service period; as this frame must have 1871 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1872 * When TX status is reported for this frame, the service period is 1873 * marked has having ended and a new one can be started by the peer. 1874 * 1875 * Additionally, non-bufferable MMPDUs can also be transmitted by 1876 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1877 * 1878 * Another race condition can happen on some devices like iwlwifi 1879 * when there are frames queued for the station and it wakes up 1880 * or polls; the frames that are already queued could end up being 1881 * transmitted first instead, causing reordering and/or wrong 1882 * processing of the EOSP. The cause is that allowing frames to be 1883 * transmitted to a certain station is out-of-band communication to 1884 * the device. To allow this problem to be solved, the driver can 1885 * call ieee80211_sta_block_awake() if frames are buffered when it 1886 * is notified that the station went to sleep. When all these frames 1887 * have been filtered (see above), it must call the function again 1888 * to indicate that the station is no longer blocked. 1889 * 1890 * If the driver buffers frames in the driver for aggregation in any 1891 * way, it must use the ieee80211_sta_set_buffered() call when it is 1892 * notified of the station going to sleep to inform mac80211 of any 1893 * TIDs that have frames buffered. Note that when a station wakes up 1894 * this information is reset (hence the requirement to call it when 1895 * informed of the station going to sleep). Then, when a service 1896 * period starts for any reason, @release_buffered_frames is called 1897 * with the number of frames to be released and which TIDs they are 1898 * to come from. In this case, the driver is responsible for setting 1899 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1900 * to help the @more_data paramter is passed to tell the driver if 1901 * there is more data on other TIDs -- the TIDs to release frames 1902 * from are ignored since mac80211 doesn't know how many frames the 1903 * buffers for those TIDs contain. 1904 * 1905 * If the driver also implement GO mode, where absence periods may 1906 * shorten service periods (or abort PS-Poll responses), it must 1907 * filter those response frames except in the case of frames that 1908 * are buffered in the driver -- those must remain buffered to avoid 1909 * reordering. Because it is possible that no frames are released 1910 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1911 * to indicate to mac80211 that the service period ended anyway. 1912 * 1913 * Finally, if frames from multiple TIDs are released from mac80211 1914 * but the driver might reorder them, it must clear & set the flags 1915 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1916 * and also take care of the EOSP and MORE_DATA bits in the frame. 1917 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1918 */ 1919 1920/** 1921 * DOC: HW queue control 1922 * 1923 * Before HW queue control was introduced, mac80211 only had a single static 1924 * assignment of per-interface AC software queues to hardware queues. This 1925 * was problematic for a few reasons: 1926 * 1) off-channel transmissions might get stuck behind other frames 1927 * 2) multiple virtual interfaces couldn't be handled correctly 1928 * 3) after-DTIM frames could get stuck behind other frames 1929 * 1930 * To solve this, hardware typically uses multiple different queues for all 1931 * the different usages, and this needs to be propagated into mac80211 so it 1932 * won't have the same problem with the software queues. 1933 * 1934 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 1935 * flag that tells it that the driver implements its own queue control. To do 1936 * so, the driver will set up the various queues in each &struct ieee80211_vif 1937 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 1938 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 1939 * if necessary will queue the frame on the right software queue that mirrors 1940 * the hardware queue. 1941 * Additionally, the driver has to then use these HW queue IDs for the queue 1942 * management functions (ieee80211_stop_queue() et al.) 1943 * 1944 * The driver is free to set up the queue mappings as needed, multiple virtual 1945 * interfaces may map to the same hardware queues if needed. The setup has to 1946 * happen during add_interface or change_interface callbacks. For example, a 1947 * driver supporting station+station and station+AP modes might decide to have 1948 * 10 hardware queues to handle different scenarios: 1949 * 1950 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 1951 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 1952 * after-DTIM queue for AP: 8 1953 * off-channel queue: 9 1954 * 1955 * It would then set up the hardware like this: 1956 * hw.offchannel_tx_hw_queue = 9 1957 * 1958 * and the first virtual interface that is added as follows: 1959 * vif.hw_queue[IEEE80211_AC_VO] = 0 1960 * vif.hw_queue[IEEE80211_AC_VI] = 1 1961 * vif.hw_queue[IEEE80211_AC_BE] = 2 1962 * vif.hw_queue[IEEE80211_AC_BK] = 3 1963 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 1964 * and the second virtual interface with 4-7. 1965 * 1966 * If queue 6 gets full, for example, mac80211 would only stop the second 1967 * virtual interface's BE queue since virtual interface queues are per AC. 1968 * 1969 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 1970 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 1971 * queue could potentially be shared since mac80211 will look at cab_queue when 1972 * a queue is stopped/woken even if the interface is not in AP mode. 1973 */ 1974 1975/** 1976 * enum ieee80211_filter_flags - hardware filter flags 1977 * 1978 * These flags determine what the filter in hardware should be 1979 * programmed to let through and what should not be passed to the 1980 * stack. It is always safe to pass more frames than requested, 1981 * but this has negative impact on power consumption. 1982 * 1983 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1984 * think of the BSS as your network segment and then this corresponds 1985 * to the regular ethernet device promiscuous mode. 1986 * 1987 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1988 * by the user or if the hardware is not capable of filtering by 1989 * multicast address. 1990 * 1991 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1992 * %RX_FLAG_FAILED_FCS_CRC for them) 1993 * 1994 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1995 * the %RX_FLAG_FAILED_PLCP_CRC for them 1996 * 1997 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1998 * to the hardware that it should not filter beacons or probe responses 1999 * by BSSID. Filtering them can greatly reduce the amount of processing 2000 * mac80211 needs to do and the amount of CPU wakeups, so you should 2001 * honour this flag if possible. 2002 * 2003 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2004 * is not set then only those addressed to this station. 2005 * 2006 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2007 * 2008 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2009 * those addressed to this station. 2010 * 2011 * @FIF_PROBE_REQ: pass probe request frames 2012 */ 2013enum ieee80211_filter_flags { 2014 FIF_PROMISC_IN_BSS = 1<<0, 2015 FIF_ALLMULTI = 1<<1, 2016 FIF_FCSFAIL = 1<<2, 2017 FIF_PLCPFAIL = 1<<3, 2018 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2019 FIF_CONTROL = 1<<5, 2020 FIF_OTHER_BSS = 1<<6, 2021 FIF_PSPOLL = 1<<7, 2022 FIF_PROBE_REQ = 1<<8, 2023}; 2024 2025/** 2026 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2027 * 2028 * These flags are used with the ampdu_action() callback in 2029 * &struct ieee80211_ops to indicate which action is needed. 2030 * 2031 * Note that drivers MUST be able to deal with a TX aggregation 2032 * session being stopped even before they OK'ed starting it by 2033 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2034 * might receive the addBA frame and send a delBA right away! 2035 * 2036 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2037 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2038 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2039 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2040 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2041 * queued packets, now unaggregated. After all packets are transmitted the 2042 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2043 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2044 * called when the station is removed. There's no need or reason to call 2045 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2046 * session is gone and removes the station. 2047 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2048 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2049 * now the connection is dropped and the station will be removed. Drivers 2050 * should clean up and drop remaining packets when this is called. 2051 */ 2052enum ieee80211_ampdu_mlme_action { 2053 IEEE80211_AMPDU_RX_START, 2054 IEEE80211_AMPDU_RX_STOP, 2055 IEEE80211_AMPDU_TX_START, 2056 IEEE80211_AMPDU_TX_STOP_CONT, 2057 IEEE80211_AMPDU_TX_STOP_FLUSH, 2058 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2059 IEEE80211_AMPDU_TX_OPERATIONAL, 2060}; 2061 2062/** 2063 * enum ieee80211_frame_release_type - frame release reason 2064 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2065 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2066 * frame received on trigger-enabled AC 2067 */ 2068enum ieee80211_frame_release_type { 2069 IEEE80211_FRAME_RELEASE_PSPOLL, 2070 IEEE80211_FRAME_RELEASE_UAPSD, 2071}; 2072 2073/** 2074 * enum ieee80211_rate_control_changed - flags to indicate what changed 2075 * 2076 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2077 * to this station changed. 2078 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2079 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2080 * changed (in IBSS mode) due to discovering more information about 2081 * the peer. 2082 */ 2083enum ieee80211_rate_control_changed { 2084 IEEE80211_RC_BW_CHANGED = BIT(0), 2085 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2086 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2087}; 2088 2089/** 2090 * struct ieee80211_ops - callbacks from mac80211 to the driver 2091 * 2092 * This structure contains various callbacks that the driver may 2093 * handle or, in some cases, must handle, for example to configure 2094 * the hardware to a new channel or to transmit a frame. 2095 * 2096 * @tx: Handler that 802.11 module calls for each transmitted frame. 2097 * skb contains the buffer starting from the IEEE 802.11 header. 2098 * The low-level driver should send the frame out based on 2099 * configuration in the TX control data. This handler should, 2100 * preferably, never fail and stop queues appropriately. 2101 * Must be atomic. 2102 * 2103 * @start: Called before the first netdevice attached to the hardware 2104 * is enabled. This should turn on the hardware and must turn on 2105 * frame reception (for possibly enabled monitor interfaces.) 2106 * Returns negative error codes, these may be seen in userspace, 2107 * or zero. 2108 * When the device is started it should not have a MAC address 2109 * to avoid acknowledging frames before a non-monitor device 2110 * is added. 2111 * Must be implemented and can sleep. 2112 * 2113 * @stop: Called after last netdevice attached to the hardware 2114 * is disabled. This should turn off the hardware (at least 2115 * it must turn off frame reception.) 2116 * May be called right after add_interface if that rejects 2117 * an interface. If you added any work onto the mac80211 workqueue 2118 * you should ensure to cancel it on this callback. 2119 * Must be implemented and can sleep. 2120 * 2121 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2122 * stop transmitting and doing any other configuration, and then 2123 * ask the device to suspend. This is only invoked when WoWLAN is 2124 * configured, otherwise the device is deconfigured completely and 2125 * reconfigured at resume time. 2126 * The driver may also impose special conditions under which it 2127 * wants to use the "normal" suspend (deconfigure), say if it only 2128 * supports WoWLAN when the device is associated. In this case, it 2129 * must return 1 from this function. 2130 * 2131 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2132 * now resuming its operation, after this the device must be fully 2133 * functional again. If this returns an error, the only way out is 2134 * to also unregister the device. If it returns 1, then mac80211 2135 * will also go through the regular complete restart on resume. 2136 * 2137 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2138 * modified. The reason is that device_set_wakeup_enable() is 2139 * supposed to be called when the configuration changes, not only 2140 * in suspend(). 2141 * 2142 * @add_interface: Called when a netdevice attached to the hardware is 2143 * enabled. Because it is not called for monitor mode devices, @start 2144 * and @stop must be implemented. 2145 * The driver should perform any initialization it needs before 2146 * the device can be enabled. The initial configuration for the 2147 * interface is given in the conf parameter. 2148 * The callback may refuse to add an interface by returning a 2149 * negative error code (which will be seen in userspace.) 2150 * Must be implemented and can sleep. 2151 * 2152 * @change_interface: Called when a netdevice changes type. This callback 2153 * is optional, but only if it is supported can interface types be 2154 * switched while the interface is UP. The callback may sleep. 2155 * Note that while an interface is being switched, it will not be 2156 * found by the interface iteration callbacks. 2157 * 2158 * @remove_interface: Notifies a driver that an interface is going down. 2159 * The @stop callback is called after this if it is the last interface 2160 * and no monitor interfaces are present. 2161 * When all interfaces are removed, the MAC address in the hardware 2162 * must be cleared so the device no longer acknowledges packets, 2163 * the mac_addr member of the conf structure is, however, set to the 2164 * MAC address of the device going away. 2165 * Hence, this callback must be implemented. It can sleep. 2166 * 2167 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2168 * function to change hardware configuration, e.g., channel. 2169 * This function should never fail but returns a negative error code 2170 * if it does. The callback can sleep. 2171 * 2172 * @bss_info_changed: Handler for configuration requests related to BSS 2173 * parameters that may vary during BSS's lifespan, and may affect low 2174 * level driver (e.g. assoc/disassoc status, erp parameters). 2175 * This function should not be used if no BSS has been set, unless 2176 * for association indication. The @changed parameter indicates which 2177 * of the bss parameters has changed when a call is made. The callback 2178 * can sleep. 2179 * 2180 * @prepare_multicast: Prepare for multicast filter configuration. 2181 * This callback is optional, and its return value is passed 2182 * to configure_filter(). This callback must be atomic. 2183 * 2184 * @configure_filter: Configure the device's RX filter. 2185 * See the section "Frame filtering" for more information. 2186 * This callback must be implemented and can sleep. 2187 * 2188 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2189 * must be set or cleared for a given STA. Must be atomic. 2190 * 2191 * @set_key: See the section "Hardware crypto acceleration" 2192 * This callback is only called between add_interface and 2193 * remove_interface calls, i.e. while the given virtual interface 2194 * is enabled. 2195 * Returns a negative error code if the key can't be added. 2196 * The callback can sleep. 2197 * 2198 * @update_tkip_key: See the section "Hardware crypto acceleration" 2199 * This callback will be called in the context of Rx. Called for drivers 2200 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2201 * The callback must be atomic. 2202 * 2203 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2204 * host is suspended, it can assign this callback to retrieve the data 2205 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2206 * After rekeying was done it should (for example during resume) notify 2207 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2208 * 2209 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2210 * WEP when the device sends data packets autonomously, e.g. for ARP 2211 * offloading. The index can be 0-3, or -1 for unsetting it. 2212 * 2213 * @hw_scan: Ask the hardware to service the scan request, no need to start 2214 * the scan state machine in stack. The scan must honour the channel 2215 * configuration done by the regulatory agent in the wiphy's 2216 * registered bands. The hardware (or the driver) needs to make sure 2217 * that power save is disabled. 2218 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2219 * entire IEs after the SSID, so that drivers need not look at these 2220 * at all but just send them after the SSID -- mac80211 includes the 2221 * (extended) supported rates and HT information (where applicable). 2222 * When the scan finishes, ieee80211_scan_completed() must be called; 2223 * note that it also must be called when the scan cannot finish due to 2224 * any error unless this callback returned a negative error code. 2225 * The callback can sleep. 2226 * 2227 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2228 * The driver should ask the hardware to cancel the scan (if possible), 2229 * but the scan will be completed only after the driver will call 2230 * ieee80211_scan_completed(). 2231 * This callback is needed for wowlan, to prevent enqueueing a new 2232 * scan_work after the low-level driver was already suspended. 2233 * The callback can sleep. 2234 * 2235 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2236 * specific intervals. The driver must call the 2237 * ieee80211_sched_scan_results() function whenever it finds results. 2238 * This process will continue until sched_scan_stop is called. 2239 * 2240 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2241 * 2242 * @sw_scan_start: Notifier function that is called just before a software scan 2243 * is started. Can be NULL, if the driver doesn't need this notification. 2244 * The callback can sleep. 2245 * 2246 * @sw_scan_complete: Notifier function that is called just after a 2247 * software scan finished. Can be NULL, if the driver doesn't need 2248 * this notification. 2249 * The callback can sleep. 2250 * 2251 * @get_stats: Return low-level statistics. 2252 * Returns zero if statistics are available. 2253 * The callback can sleep. 2254 * 2255 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2256 * callback should be provided to read the TKIP transmit IVs (both IV32 2257 * and IV16) for the given key from hardware. 2258 * The callback must be atomic. 2259 * 2260 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2261 * if the device does fragmentation by itself; if this callback is 2262 * implemented then the stack will not do fragmentation. 2263 * The callback can sleep. 2264 * 2265 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2266 * The callback can sleep. 2267 * 2268 * @sta_add: Notifies low level driver about addition of an associated station, 2269 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2270 * 2271 * @sta_remove: Notifies low level driver about removal of an associated 2272 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2273 * 2274 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2275 * when a station is added to mac80211's station list. This callback 2276 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2277 * conditional. This callback can sleep. 2278 * 2279 * @sta_remove_debugfs: Remove the debugfs files which were added using 2280 * @sta_add_debugfs. This callback can sleep. 2281 * 2282 * @sta_notify: Notifies low level driver about power state transition of an 2283 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2284 * in AP mode, this callback will not be called when the flag 2285 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2286 * 2287 * @sta_state: Notifies low level driver about state transition of a 2288 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2289 * This callback is mutually exclusive with @sta_add/@sta_remove. 2290 * It must not fail for down transitions but may fail for transitions 2291 * up the list of states. 2292 * The callback can sleep. 2293 * 2294 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2295 * used to transmit to the station. The changes are advertised with bits 2296 * from &enum ieee80211_rate_control_changed and the values are reflected 2297 * in the station data. This callback should only be used when the driver 2298 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2299 * otherwise the rate control algorithm is notified directly. 2300 * Must be atomic. 2301 * 2302 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2303 * bursting) for a hardware TX queue. 2304 * Returns a negative error code on failure. 2305 * The callback can sleep. 2306 * 2307 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2308 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2309 * required function. 2310 * The callback can sleep. 2311 * 2312 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2313 * Currently, this is only used for IBSS mode debugging. Is not a 2314 * required function. 2315 * The callback can sleep. 2316 * 2317 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2318 * with other STAs in the IBSS. This is only used in IBSS mode. This 2319 * function is optional if the firmware/hardware takes full care of 2320 * TSF synchronization. 2321 * The callback can sleep. 2322 * 2323 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2324 * This is needed only for IBSS mode and the result of this function is 2325 * used to determine whether to reply to Probe Requests. 2326 * Returns non-zero if this device sent the last beacon. 2327 * The callback can sleep. 2328 * 2329 * @ampdu_action: Perform a certain A-MPDU action 2330 * The RA/TID combination determines the destination and TID we want 2331 * the ampdu action to be performed for. The action is defined through 2332 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2333 * is the first frame we expect to perform the action on. Notice 2334 * that TX/RX_STOP can pass NULL for this parameter. 2335 * The @buf_size parameter is only valid when the action is set to 2336 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2337 * buffer size (number of subframes) for this session -- the driver 2338 * may neither send aggregates containing more subframes than this 2339 * nor send aggregates in a way that lost frames would exceed the 2340 * buffer size. If just limiting the aggregate size, this would be 2341 * possible with a buf_size of 8: 2342 * - TX: 1.....7 2343 * - RX: 2....7 (lost frame #1) 2344 * - TX: 8..1... 2345 * which is invalid since #1 was now re-transmitted well past the 2346 * buffer size of 8. Correct ways to retransmit #1 would be: 2347 * - TX: 1 or 18 or 81 2348 * Even "189" would be wrong since 1 could be lost again. 2349 * 2350 * Returns a negative error code on failure. 2351 * The callback can sleep. 2352 * 2353 * @get_survey: Return per-channel survey information 2354 * 2355 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2356 * need to set wiphy->rfkill_poll to %true before registration, 2357 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2358 * The callback can sleep. 2359 * 2360 * @set_coverage_class: Set slot time for given coverage class as specified 2361 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2362 * accordingly. This callback is not required and may sleep. 2363 * 2364 * @testmode_cmd: Implement a cfg80211 test mode command. 2365 * The callback can sleep. 2366 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2367 * 2368 * @flush: Flush all pending frames from the hardware queue, making sure 2369 * that the hardware queues are empty. If the parameter @drop is set 2370 * to %true, pending frames may be dropped. The callback can sleep. 2371 * 2372 * @channel_switch: Drivers that need (or want) to offload the channel 2373 * switch operation for CSAs received from the AP may implement this 2374 * callback. They must then call ieee80211_chswitch_done() to indicate 2375 * completion of the channel switch. 2376 * 2377 * @napi_poll: Poll Rx queue for incoming data frames. 2378 * 2379 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2380 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2381 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2382 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2383 * 2384 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2385 * 2386 * @remain_on_channel: Starts an off-channel period on the given channel, must 2387 * call back to ieee80211_ready_on_channel() when on that channel. Note 2388 * that normal channel traffic is not stopped as this is intended for hw 2389 * offload. Frames to transmit on the off-channel channel are transmitted 2390 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2391 * duration (which will always be non-zero) expires, the driver must call 2392 * ieee80211_remain_on_channel_expired(). 2393 * Note that this callback may be called while the device is in IDLE and 2394 * must be accepted in this case. 2395 * This callback may sleep. 2396 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2397 * aborted before it expires. This callback may sleep. 2398 * 2399 * @set_ringparam: Set tx and rx ring sizes. 2400 * 2401 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2402 * 2403 * @tx_frames_pending: Check if there is any pending frame in the hardware 2404 * queues before entering power save. 2405 * 2406 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2407 * when transmitting a frame. Currently only legacy rates are handled. 2408 * The callback can sleep. 2409 * @rssi_callback: Notify driver when the average RSSI goes above/below 2410 * thresholds that were registered previously. The callback can sleep. 2411 * 2412 * @release_buffered_frames: Release buffered frames according to the given 2413 * parameters. In the case where the driver buffers some frames for 2414 * sleeping stations mac80211 will use this callback to tell the driver 2415 * to release some frames, either for PS-poll or uAPSD. 2416 * Note that if the @more_data paramter is %false the driver must check 2417 * if there are more frames on the given TIDs, and if there are more than 2418 * the frames being released then it must still set the more-data bit in 2419 * the frame. If the @more_data parameter is %true, then of course the 2420 * more-data bit must always be set. 2421 * The @tids parameter tells the driver which TIDs to release frames 2422 * from, for PS-poll it will always have only a single bit set. 2423 * In the case this is used for a PS-poll initiated release, the 2424 * @num_frames parameter will always be 1 so code can be shared. In 2425 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2426 * on the TX status (and must report TX status) so that the PS-poll 2427 * period is properly ended. This is used to avoid sending multiple 2428 * responses for a retried PS-poll frame. 2429 * In the case this is used for uAPSD, the @num_frames parameter may be 2430 * bigger than one, but the driver may send fewer frames (it must send 2431 * at least one, however). In this case it is also responsible for 2432 * setting the EOSP flag in the QoS header of the frames. Also, when the 2433 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2434 * on the last frame in the SP. Alternatively, it may call the function 2435 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2436 * This callback must be atomic. 2437 * @allow_buffered_frames: Prepare device to allow the given number of frames 2438 * to go out to the given station. The frames will be sent by mac80211 2439 * via the usual TX path after this call. The TX information for frames 2440 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2441 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2442 * frames from multiple TIDs are released and the driver might reorder 2443 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2444 * on the last frame and clear it on all others and also handle the EOSP 2445 * bit in the QoS header correctly. Alternatively, it can also call the 2446 * ieee80211_sta_eosp_irqsafe() function. 2447 * The @tids parameter is a bitmap and tells the driver which TIDs the 2448 * frames will be on; it will at most have two bits set. 2449 * This callback must be atomic. 2450 * 2451 * @get_et_sset_count: Ethtool API to get string-set count. 2452 * 2453 * @get_et_stats: Ethtool API to get a set of u64 stats. 2454 * 2455 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2456 * and perhaps other supported types of ethtool data-sets. 2457 * 2458 * @get_rssi: Get current signal strength in dBm, the function is optional 2459 * and can sleep. 2460 * 2461 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2462 * before associated. In multi-channel scenarios, a virtual interface is 2463 * bound to a channel before it is associated, but as it isn't associated 2464 * yet it need not necessarily be given airtime, in particular since any 2465 * transmission to a P2P GO needs to be synchronized against the GO's 2466 * powersave state. mac80211 will call this function before transmitting a 2467 * management frame prior to having successfully associated to allow the 2468 * driver to give it channel time for the transmission, to get a response 2469 * and to be able to synchronize with the GO. 2470 * The callback will be called before each transmission and upon return 2471 * mac80211 will transmit the frame right away. 2472 * The callback is optional and can (should!) sleep. 2473 * 2474 * @add_chanctx: Notifies device driver about new channel context creation. 2475 * @remove_chanctx: Notifies device driver about channel context destruction. 2476 * @change_chanctx: Notifies device driver about channel context changes that 2477 * may happen when combining different virtual interfaces on the same 2478 * channel context with different settings 2479 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2480 * to vif. Possible use is for hw queue remapping. 2481 * @unassign_vif_chanctx: Notifies device driver about channel context being 2482 * unbound from vif. 2483 * @start_ap: Start operation on the AP interface, this is called after all the 2484 * information in bss_conf is set and beacon can be retrieved. A channel 2485 * context is bound before this is called. Note that if the driver uses 2486 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2487 * just "paused" for scanning/ROC, which is indicated by the beacon being 2488 * disabled/enabled via @bss_info_changed. 2489 * @stop_ap: Stop operation on the AP interface. 2490 * 2491 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2492 * reconfiguration has completed. This can help the driver implement the 2493 * reconfiguration step. Also called when reconfiguring because the 2494 * driver's resume function returned 1, as this is just like an "inline" 2495 * hardware restart. This callback may sleep. 2496 * 2497 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2498 * Currently, this is only called for managed or P2P client interfaces. 2499 * This callback is optional; it must not sleep. 2500 */ 2501struct ieee80211_ops { 2502 void (*tx)(struct ieee80211_hw *hw, 2503 struct ieee80211_tx_control *control, 2504 struct sk_buff *skb); 2505 int (*start)(struct ieee80211_hw *hw); 2506 void (*stop)(struct ieee80211_hw *hw); 2507#ifdef CONFIG_PM 2508 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2509 int (*resume)(struct ieee80211_hw *hw); 2510 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2511#endif 2512 int (*add_interface)(struct ieee80211_hw *hw, 2513 struct ieee80211_vif *vif); 2514 int (*change_interface)(struct ieee80211_hw *hw, 2515 struct ieee80211_vif *vif, 2516 enum nl80211_iftype new_type, bool p2p); 2517 void (*remove_interface)(struct ieee80211_hw *hw, 2518 struct ieee80211_vif *vif); 2519 int (*config)(struct ieee80211_hw *hw, u32 changed); 2520 void (*bss_info_changed)(struct ieee80211_hw *hw, 2521 struct ieee80211_vif *vif, 2522 struct ieee80211_bss_conf *info, 2523 u32 changed); 2524 2525 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2526 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2527 2528 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2529 struct netdev_hw_addr_list *mc_list); 2530 void (*configure_filter)(struct ieee80211_hw *hw, 2531 unsigned int changed_flags, 2532 unsigned int *total_flags, 2533 u64 multicast); 2534 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2535 bool set); 2536 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2537 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2538 struct ieee80211_key_conf *key); 2539 void (*update_tkip_key)(struct ieee80211_hw *hw, 2540 struct ieee80211_vif *vif, 2541 struct ieee80211_key_conf *conf, 2542 struct ieee80211_sta *sta, 2543 u32 iv32, u16 *phase1key); 2544 void (*set_rekey_data)(struct ieee80211_hw *hw, 2545 struct ieee80211_vif *vif, 2546 struct cfg80211_gtk_rekey_data *data); 2547 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2548 struct ieee80211_vif *vif, int idx); 2549 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2550 struct cfg80211_scan_request *req); 2551 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2552 struct ieee80211_vif *vif); 2553 int (*sched_scan_start)(struct ieee80211_hw *hw, 2554 struct ieee80211_vif *vif, 2555 struct cfg80211_sched_scan_request *req, 2556 struct ieee80211_sched_scan_ies *ies); 2557 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2558 struct ieee80211_vif *vif); 2559 void (*sw_scan_start)(struct ieee80211_hw *hw); 2560 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2561 int (*get_stats)(struct ieee80211_hw *hw, 2562 struct ieee80211_low_level_stats *stats); 2563 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2564 u32 *iv32, u16 *iv16); 2565 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2566 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2567 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2568 struct ieee80211_sta *sta); 2569 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2570 struct ieee80211_sta *sta); 2571#ifdef CONFIG_MAC80211_DEBUGFS 2572 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2573 struct ieee80211_vif *vif, 2574 struct ieee80211_sta *sta, 2575 struct dentry *dir); 2576 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2577 struct ieee80211_vif *vif, 2578 struct ieee80211_sta *sta, 2579 struct dentry *dir); 2580#endif 2581 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2582 enum sta_notify_cmd, struct ieee80211_sta *sta); 2583 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2584 struct ieee80211_sta *sta, 2585 enum ieee80211_sta_state old_state, 2586 enum ieee80211_sta_state new_state); 2587 void (*sta_rc_update)(struct ieee80211_hw *hw, 2588 struct ieee80211_vif *vif, 2589 struct ieee80211_sta *sta, 2590 u32 changed); 2591 int (*conf_tx)(struct ieee80211_hw *hw, 2592 struct ieee80211_vif *vif, u16 ac, 2593 const struct ieee80211_tx_queue_params *params); 2594 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2595 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2596 u64 tsf); 2597 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2598 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2599 int (*ampdu_action)(struct ieee80211_hw *hw, 2600 struct ieee80211_vif *vif, 2601 enum ieee80211_ampdu_mlme_action action, 2602 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2603 u8 buf_size); 2604 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2605 struct survey_info *survey); 2606 void (*rfkill_poll)(struct ieee80211_hw *hw); 2607 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2608#ifdef CONFIG_NL80211_TESTMODE 2609 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2610 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2611 struct netlink_callback *cb, 2612 void *data, int len); 2613#endif 2614 void (*flush)(struct ieee80211_hw *hw, bool drop); 2615 void (*channel_switch)(struct ieee80211_hw *hw, 2616 struct ieee80211_channel_switch *ch_switch); 2617 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2618 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2619 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2620 2621 int (*remain_on_channel)(struct ieee80211_hw *hw, 2622 struct ieee80211_vif *vif, 2623 struct ieee80211_channel *chan, 2624 int duration); 2625 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2626 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2627 void (*get_ringparam)(struct ieee80211_hw *hw, 2628 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2629 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2630 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2631 const struct cfg80211_bitrate_mask *mask); 2632 void (*rssi_callback)(struct ieee80211_hw *hw, 2633 struct ieee80211_vif *vif, 2634 enum ieee80211_rssi_event rssi_event); 2635 2636 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2637 struct ieee80211_sta *sta, 2638 u16 tids, int num_frames, 2639 enum ieee80211_frame_release_type reason, 2640 bool more_data); 2641 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2642 struct ieee80211_sta *sta, 2643 u16 tids, int num_frames, 2644 enum ieee80211_frame_release_type reason, 2645 bool more_data); 2646 2647 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2648 struct ieee80211_vif *vif, int sset); 2649 void (*get_et_stats)(struct ieee80211_hw *hw, 2650 struct ieee80211_vif *vif, 2651 struct ethtool_stats *stats, u64 *data); 2652 void (*get_et_strings)(struct ieee80211_hw *hw, 2653 struct ieee80211_vif *vif, 2654 u32 sset, u8 *data); 2655 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2656 struct ieee80211_sta *sta, s8 *rssi_dbm); 2657 2658 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2659 struct ieee80211_vif *vif); 2660 2661 int (*add_chanctx)(struct ieee80211_hw *hw, 2662 struct ieee80211_chanctx_conf *ctx); 2663 void (*remove_chanctx)(struct ieee80211_hw *hw, 2664 struct ieee80211_chanctx_conf *ctx); 2665 void (*change_chanctx)(struct ieee80211_hw *hw, 2666 struct ieee80211_chanctx_conf *ctx, 2667 u32 changed); 2668 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2669 struct ieee80211_vif *vif, 2670 struct ieee80211_chanctx_conf *ctx); 2671 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2672 struct ieee80211_vif *vif, 2673 struct ieee80211_chanctx_conf *ctx); 2674 2675 void (*restart_complete)(struct ieee80211_hw *hw); 2676 2677#if IS_ENABLED(CONFIG_IPV6) 2678 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2679 struct ieee80211_vif *vif, 2680 struct inet6_dev *idev); 2681#endif 2682}; 2683 2684/** 2685 * ieee80211_alloc_hw - Allocate a new hardware device 2686 * 2687 * This must be called once for each hardware device. The returned pointer 2688 * must be used to refer to this device when calling other functions. 2689 * mac80211 allocates a private data area for the driver pointed to by 2690 * @priv in &struct ieee80211_hw, the size of this area is given as 2691 * @priv_data_len. 2692 * 2693 * @priv_data_len: length of private data 2694 * @ops: callbacks for this device 2695 * 2696 * Return: A pointer to the new hardware device, or %NULL on error. 2697 */ 2698struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2699 const struct ieee80211_ops *ops); 2700 2701/** 2702 * ieee80211_register_hw - Register hardware device 2703 * 2704 * You must call this function before any other functions in 2705 * mac80211. Note that before a hardware can be registered, you 2706 * need to fill the contained wiphy's information. 2707 * 2708 * @hw: the device to register as returned by ieee80211_alloc_hw() 2709 * 2710 * Return: 0 on success. An error code otherwise. 2711 */ 2712int ieee80211_register_hw(struct ieee80211_hw *hw); 2713 2714/** 2715 * struct ieee80211_tpt_blink - throughput blink description 2716 * @throughput: throughput in Kbit/sec 2717 * @blink_time: blink time in milliseconds 2718 * (full cycle, ie. one off + one on period) 2719 */ 2720struct ieee80211_tpt_blink { 2721 int throughput; 2722 int blink_time; 2723}; 2724 2725/** 2726 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2727 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2728 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2729 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2730 * interface is connected in some way, including being an AP 2731 */ 2732enum ieee80211_tpt_led_trigger_flags { 2733 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2734 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2735 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2736}; 2737 2738#ifdef CONFIG_MAC80211_LEDS 2739extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2740extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2741extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2742extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2743extern char *__ieee80211_create_tpt_led_trigger( 2744 struct ieee80211_hw *hw, unsigned int flags, 2745 const struct ieee80211_tpt_blink *blink_table, 2746 unsigned int blink_table_len); 2747#endif 2748/** 2749 * ieee80211_get_tx_led_name - get name of TX LED 2750 * 2751 * mac80211 creates a transmit LED trigger for each wireless hardware 2752 * that can be used to drive LEDs if your driver registers a LED device. 2753 * This function returns the name (or %NULL if not configured for LEDs) 2754 * of the trigger so you can automatically link the LED device. 2755 * 2756 * @hw: the hardware to get the LED trigger name for 2757 * 2758 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2759 */ 2760static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2761{ 2762#ifdef CONFIG_MAC80211_LEDS 2763 return __ieee80211_get_tx_led_name(hw); 2764#else 2765 return NULL; 2766#endif 2767} 2768 2769/** 2770 * ieee80211_get_rx_led_name - get name of RX LED 2771 * 2772 * mac80211 creates a receive LED trigger for each wireless hardware 2773 * that can be used to drive LEDs if your driver registers a LED device. 2774 * This function returns the name (or %NULL if not configured for LEDs) 2775 * of the trigger so you can automatically link the LED device. 2776 * 2777 * @hw: the hardware to get the LED trigger name for 2778 * 2779 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2780 */ 2781static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2782{ 2783#ifdef CONFIG_MAC80211_LEDS 2784 return __ieee80211_get_rx_led_name(hw); 2785#else 2786 return NULL; 2787#endif 2788} 2789 2790/** 2791 * ieee80211_get_assoc_led_name - get name of association LED 2792 * 2793 * mac80211 creates a association LED trigger for each wireless hardware 2794 * that can be used to drive LEDs if your driver registers a LED device. 2795 * This function returns the name (or %NULL if not configured for LEDs) 2796 * of the trigger so you can automatically link the LED device. 2797 * 2798 * @hw: the hardware to get the LED trigger name for 2799 * 2800 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2801 */ 2802static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2803{ 2804#ifdef CONFIG_MAC80211_LEDS 2805 return __ieee80211_get_assoc_led_name(hw); 2806#else 2807 return NULL; 2808#endif 2809} 2810 2811/** 2812 * ieee80211_get_radio_led_name - get name of radio LED 2813 * 2814 * mac80211 creates a radio change LED trigger for each wireless hardware 2815 * that can be used to drive LEDs if your driver registers a LED device. 2816 * This function returns the name (or %NULL if not configured for LEDs) 2817 * of the trigger so you can automatically link the LED device. 2818 * 2819 * @hw: the hardware to get the LED trigger name for 2820 * 2821 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2822 */ 2823static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2824{ 2825#ifdef CONFIG_MAC80211_LEDS 2826 return __ieee80211_get_radio_led_name(hw); 2827#else 2828 return NULL; 2829#endif 2830} 2831 2832/** 2833 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2834 * @hw: the hardware to create the trigger for 2835 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2836 * @blink_table: the blink table -- needs to be ordered by throughput 2837 * @blink_table_len: size of the blink table 2838 * 2839 * Return: %NULL (in case of error, or if no LED triggers are 2840 * configured) or the name of the new trigger. 2841 * 2842 * Note: This function must be called before ieee80211_register_hw(). 2843 */ 2844static inline char * 2845ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2846 const struct ieee80211_tpt_blink *blink_table, 2847 unsigned int blink_table_len) 2848{ 2849#ifdef CONFIG_MAC80211_LEDS 2850 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2851 blink_table_len); 2852#else 2853 return NULL; 2854#endif 2855} 2856 2857/** 2858 * ieee80211_unregister_hw - Unregister a hardware device 2859 * 2860 * This function instructs mac80211 to free allocated resources 2861 * and unregister netdevices from the networking subsystem. 2862 * 2863 * @hw: the hardware to unregister 2864 */ 2865void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2866 2867/** 2868 * ieee80211_free_hw - free hardware descriptor 2869 * 2870 * This function frees everything that was allocated, including the 2871 * private data for the driver. You must call ieee80211_unregister_hw() 2872 * before calling this function. 2873 * 2874 * @hw: the hardware to free 2875 */ 2876void ieee80211_free_hw(struct ieee80211_hw *hw); 2877 2878/** 2879 * ieee80211_restart_hw - restart hardware completely 2880 * 2881 * Call this function when the hardware was restarted for some reason 2882 * (hardware error, ...) and the driver is unable to restore its state 2883 * by itself. mac80211 assumes that at this point the driver/hardware 2884 * is completely uninitialised and stopped, it starts the process by 2885 * calling the ->start() operation. The driver will need to reset all 2886 * internal state that it has prior to calling this function. 2887 * 2888 * @hw: the hardware to restart 2889 */ 2890void ieee80211_restart_hw(struct ieee80211_hw *hw); 2891 2892/** ieee80211_napi_schedule - schedule NAPI poll 2893 * 2894 * Use this function to schedule NAPI polling on a device. 2895 * 2896 * @hw: the hardware to start polling 2897 */ 2898void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2899 2900/** ieee80211_napi_complete - complete NAPI polling 2901 * 2902 * Use this function to finish NAPI polling on a device. 2903 * 2904 * @hw: the hardware to stop polling 2905 */ 2906void ieee80211_napi_complete(struct ieee80211_hw *hw); 2907 2908/** 2909 * ieee80211_rx - receive frame 2910 * 2911 * Use this function to hand received frames to mac80211. The receive 2912 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2913 * paged @skb is used, the driver is recommended to put the ieee80211 2914 * header of the frame on the linear part of the @skb to avoid memory 2915 * allocation and/or memcpy by the stack. 2916 * 2917 * This function may not be called in IRQ context. Calls to this function 2918 * for a single hardware must be synchronized against each other. Calls to 2919 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2920 * mixed for a single hardware. 2921 * 2922 * In process context use instead ieee80211_rx_ni(). 2923 * 2924 * @hw: the hardware this frame came in on 2925 * @skb: the buffer to receive, owned by mac80211 after this call 2926 */ 2927void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2928 2929/** 2930 * ieee80211_rx_irqsafe - receive frame 2931 * 2932 * Like ieee80211_rx() but can be called in IRQ context 2933 * (internally defers to a tasklet.) 2934 * 2935 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2936 * be mixed for a single hardware. 2937 * 2938 * @hw: the hardware this frame came in on 2939 * @skb: the buffer to receive, owned by mac80211 after this call 2940 */ 2941void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2942 2943/** 2944 * ieee80211_rx_ni - receive frame (in process context) 2945 * 2946 * Like ieee80211_rx() but can be called in process context 2947 * (internally disables bottom halves). 2948 * 2949 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2950 * not be mixed for a single hardware. 2951 * 2952 * @hw: the hardware this frame came in on 2953 * @skb: the buffer to receive, owned by mac80211 after this call 2954 */ 2955static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2956 struct sk_buff *skb) 2957{ 2958 local_bh_disable(); 2959 ieee80211_rx(hw, skb); 2960 local_bh_enable(); 2961} 2962 2963/** 2964 * ieee80211_sta_ps_transition - PS transition for connected sta 2965 * 2966 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2967 * flag set, use this function to inform mac80211 about a connected station 2968 * entering/leaving PS mode. 2969 * 2970 * This function may not be called in IRQ context or with softirqs enabled. 2971 * 2972 * Calls to this function for a single hardware must be synchronized against 2973 * each other. 2974 * 2975 * @sta: currently connected sta 2976 * @start: start or stop PS 2977 * 2978 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 2979 */ 2980int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2981 2982/** 2983 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2984 * (in process context) 2985 * 2986 * Like ieee80211_sta_ps_transition() but can be called in process context 2987 * (internally disables bottom halves). Concurrent call restriction still 2988 * applies. 2989 * 2990 * @sta: currently connected sta 2991 * @start: start or stop PS 2992 * 2993 * Return: Like ieee80211_sta_ps_transition(). 2994 */ 2995static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2996 bool start) 2997{ 2998 int ret; 2999 3000 local_bh_disable(); 3001 ret = ieee80211_sta_ps_transition(sta, start); 3002 local_bh_enable(); 3003 3004 return ret; 3005} 3006 3007/* 3008 * The TX headroom reserved by mac80211 for its own tx_status functions. 3009 * This is enough for the radiotap header. 3010 */ 3011#define IEEE80211_TX_STATUS_HEADROOM 14 3012 3013/** 3014 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3015 * @sta: &struct ieee80211_sta pointer for the sleeping station 3016 * @tid: the TID that has buffered frames 3017 * @buffered: indicates whether or not frames are buffered for this TID 3018 * 3019 * If a driver buffers frames for a powersave station instead of passing 3020 * them back to mac80211 for retransmission, the station may still need 3021 * to be told that there are buffered frames via the TIM bit. 3022 * 3023 * This function informs mac80211 whether or not there are frames that are 3024 * buffered in the driver for a given TID; mac80211 can then use this data 3025 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3026 * call! Beware of the locking!) 3027 * 3028 * If all frames are released to the station (due to PS-poll or uAPSD) 3029 * then the driver needs to inform mac80211 that there no longer are 3030 * frames buffered. However, when the station wakes up mac80211 assumes 3031 * that all buffered frames will be transmitted and clears this data, 3032 * drivers need to make sure they inform mac80211 about all buffered 3033 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3034 * 3035 * Note that technically mac80211 only needs to know this per AC, not per 3036 * TID, but since driver buffering will inevitably happen per TID (since 3037 * it is related to aggregation) it is easier to make mac80211 map the 3038 * TID to the AC as required instead of keeping track in all drivers that 3039 * use this API. 3040 */ 3041void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3042 u8 tid, bool buffered); 3043 3044/** 3045 * ieee80211_tx_status - transmit status callback 3046 * 3047 * Call this function for all transmitted frames after they have been 3048 * transmitted. It is permissible to not call this function for 3049 * multicast frames but this can affect statistics. 3050 * 3051 * This function may not be called in IRQ context. Calls to this function 3052 * for a single hardware must be synchronized against each other. Calls 3053 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3054 * may not be mixed for a single hardware. 3055 * 3056 * @hw: the hardware the frame was transmitted by 3057 * @skb: the frame that was transmitted, owned by mac80211 after this call 3058 */ 3059void ieee80211_tx_status(struct ieee80211_hw *hw, 3060 struct sk_buff *skb); 3061 3062/** 3063 * ieee80211_tx_status_ni - transmit status callback (in process context) 3064 * 3065 * Like ieee80211_tx_status() but can be called in process context. 3066 * 3067 * Calls to this function, ieee80211_tx_status() and 3068 * ieee80211_tx_status_irqsafe() may not be mixed 3069 * for a single hardware. 3070 * 3071 * @hw: the hardware the frame was transmitted by 3072 * @skb: the frame that was transmitted, owned by mac80211 after this call 3073 */ 3074static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3075 struct sk_buff *skb) 3076{ 3077 local_bh_disable(); 3078 ieee80211_tx_status(hw, skb); 3079 local_bh_enable(); 3080} 3081 3082/** 3083 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3084 * 3085 * Like ieee80211_tx_status() but can be called in IRQ context 3086 * (internally defers to a tasklet.) 3087 * 3088 * Calls to this function, ieee80211_tx_status() and 3089 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3090 * 3091 * @hw: the hardware the frame was transmitted by 3092 * @skb: the frame that was transmitted, owned by mac80211 after this call 3093 */ 3094void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3095 struct sk_buff *skb); 3096 3097/** 3098 * ieee80211_report_low_ack - report non-responding station 3099 * 3100 * When operating in AP-mode, call this function to report a non-responding 3101 * connected STA. 3102 * 3103 * @sta: the non-responding connected sta 3104 * @num_packets: number of packets sent to @sta without a response 3105 */ 3106void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3107 3108/** 3109 * ieee80211_beacon_get_tim - beacon generation function 3110 * @hw: pointer obtained from ieee80211_alloc_hw(). 3111 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3112 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3113 * Set to 0 if invalid (in non-AP modes). 3114 * @tim_length: pointer to variable that will receive the TIM IE length, 3115 * (including the ID and length bytes!). 3116 * Set to 0 if invalid (in non-AP modes). 3117 * 3118 * If the driver implements beaconing modes, it must use this function to 3119 * obtain the beacon frame/template. 3120 * 3121 * If the beacon frames are generated by the host system (i.e., not in 3122 * hardware/firmware), the driver uses this function to get each beacon 3123 * frame from mac80211 -- it is responsible for calling this function 3124 * before the beacon is needed (e.g. based on hardware interrupt). 3125 * 3126 * If the beacon frames are generated by the device, then the driver 3127 * must use the returned beacon as the template and change the TIM IE 3128 * according to the current DTIM parameters/TIM bitmap. 3129 * 3130 * The driver is responsible for freeing the returned skb. 3131 * 3132 * Return: The beacon template. %NULL on error. 3133 */ 3134struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3135 struct ieee80211_vif *vif, 3136 u16 *tim_offset, u16 *tim_length); 3137 3138/** 3139 * ieee80211_beacon_get - beacon generation function 3140 * @hw: pointer obtained from ieee80211_alloc_hw(). 3141 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3142 * 3143 * See ieee80211_beacon_get_tim(). 3144 * 3145 * Return: See ieee80211_beacon_get_tim(). 3146 */ 3147static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3148 struct ieee80211_vif *vif) 3149{ 3150 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3151} 3152 3153/** 3154 * ieee80211_proberesp_get - retrieve a Probe Response template 3155 * @hw: pointer obtained from ieee80211_alloc_hw(). 3156 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3157 * 3158 * Creates a Probe Response template which can, for example, be uploaded to 3159 * hardware. The destination address should be set by the caller. 3160 * 3161 * Can only be called in AP mode. 3162 * 3163 * Return: The Probe Response template. %NULL on error. 3164 */ 3165struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3166 struct ieee80211_vif *vif); 3167 3168/** 3169 * ieee80211_pspoll_get - retrieve a PS Poll template 3170 * @hw: pointer obtained from ieee80211_alloc_hw(). 3171 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3172 * 3173 * Creates a PS Poll a template which can, for example, uploaded to 3174 * hardware. The template must be updated after association so that correct 3175 * AID, BSSID and MAC address is used. 3176 * 3177 * Note: Caller (or hardware) is responsible for setting the 3178 * &IEEE80211_FCTL_PM bit. 3179 * 3180 * Return: The PS Poll template. %NULL on error. 3181 */ 3182struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3183 struct ieee80211_vif *vif); 3184 3185/** 3186 * ieee80211_nullfunc_get - retrieve a nullfunc template 3187 * @hw: pointer obtained from ieee80211_alloc_hw(). 3188 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3189 * 3190 * Creates a Nullfunc template which can, for example, uploaded to 3191 * hardware. The template must be updated after association so that correct 3192 * BSSID and address is used. 3193 * 3194 * Note: Caller (or hardware) is responsible for setting the 3195 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3196 * 3197 * Return: The nullfunc template. %NULL on error. 3198 */ 3199struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3200 struct ieee80211_vif *vif); 3201 3202/** 3203 * ieee80211_probereq_get - retrieve a Probe Request template 3204 * @hw: pointer obtained from ieee80211_alloc_hw(). 3205 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3206 * @ssid: SSID buffer 3207 * @ssid_len: length of SSID 3208 * @tailroom: tailroom to reserve at end of SKB for IEs 3209 * 3210 * Creates a Probe Request template which can, for example, be uploaded to 3211 * hardware. 3212 * 3213 * Return: The Probe Request template. %NULL on error. 3214 */ 3215struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3216 struct ieee80211_vif *vif, 3217 const u8 *ssid, size_t ssid_len, 3218 size_t tailroom); 3219 3220/** 3221 * ieee80211_rts_get - RTS frame generation function 3222 * @hw: pointer obtained from ieee80211_alloc_hw(). 3223 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3224 * @frame: pointer to the frame that is going to be protected by the RTS. 3225 * @frame_len: the frame length (in octets). 3226 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3227 * @rts: The buffer where to store the RTS frame. 3228 * 3229 * If the RTS frames are generated by the host system (i.e., not in 3230 * hardware/firmware), the low-level driver uses this function to receive 3231 * the next RTS frame from the 802.11 code. The low-level is responsible 3232 * for calling this function before and RTS frame is needed. 3233 */ 3234void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3235 const void *frame, size_t frame_len, 3236 const struct ieee80211_tx_info *frame_txctl, 3237 struct ieee80211_rts *rts); 3238 3239/** 3240 * ieee80211_rts_duration - Get the duration field for an RTS frame 3241 * @hw: pointer obtained from ieee80211_alloc_hw(). 3242 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3243 * @frame_len: the length of the frame that is going to be protected by the RTS. 3244 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3245 * 3246 * If the RTS is generated in firmware, but the host system must provide 3247 * the duration field, the low-level driver uses this function to receive 3248 * the duration field value in little-endian byteorder. 3249 * 3250 * Return: The duration. 3251 */ 3252__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3253 struct ieee80211_vif *vif, size_t frame_len, 3254 const struct ieee80211_tx_info *frame_txctl); 3255 3256/** 3257 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3258 * @hw: pointer obtained from ieee80211_alloc_hw(). 3259 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3260 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3261 * @frame_len: the frame length (in octets). 3262 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3263 * @cts: The buffer where to store the CTS-to-self frame. 3264 * 3265 * If the CTS-to-self frames are generated by the host system (i.e., not in 3266 * hardware/firmware), the low-level driver uses this function to receive 3267 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3268 * for calling this function before and CTS-to-self frame is needed. 3269 */ 3270void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3271 struct ieee80211_vif *vif, 3272 const void *frame, size_t frame_len, 3273 const struct ieee80211_tx_info *frame_txctl, 3274 struct ieee80211_cts *cts); 3275 3276/** 3277 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3278 * @hw: pointer obtained from ieee80211_alloc_hw(). 3279 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3280 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3281 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3282 * 3283 * If the CTS-to-self is generated in firmware, but the host system must provide 3284 * the duration field, the low-level driver uses this function to receive 3285 * the duration field value in little-endian byteorder. 3286 * 3287 * Return: The duration. 3288 */ 3289__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3290 struct ieee80211_vif *vif, 3291 size_t frame_len, 3292 const struct ieee80211_tx_info *frame_txctl); 3293 3294/** 3295 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3296 * @hw: pointer obtained from ieee80211_alloc_hw(). 3297 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3298 * @band: the band to calculate the frame duration on 3299 * @frame_len: the length of the frame. 3300 * @rate: the rate at which the frame is going to be transmitted. 3301 * 3302 * Calculate the duration field of some generic frame, given its 3303 * length and transmission rate (in 100kbps). 3304 * 3305 * Return: The duration. 3306 */ 3307__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3308 struct ieee80211_vif *vif, 3309 enum ieee80211_band band, 3310 size_t frame_len, 3311 struct ieee80211_rate *rate); 3312 3313/** 3314 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3315 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3316 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3317 * 3318 * Function for accessing buffered broadcast and multicast frames. If 3319 * hardware/firmware does not implement buffering of broadcast/multicast 3320 * frames when power saving is used, 802.11 code buffers them in the host 3321 * memory. The low-level driver uses this function to fetch next buffered 3322 * frame. In most cases, this is used when generating beacon frame. 3323 * 3324 * Return: A pointer to the next buffered skb or NULL if no more buffered 3325 * frames are available. 3326 * 3327 * Note: buffered frames are returned only after DTIM beacon frame was 3328 * generated with ieee80211_beacon_get() and the low-level driver must thus 3329 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3330 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3331 * does not need to check for DTIM beacons separately and should be able to 3332 * use common code for all beacons. 3333 */ 3334struct sk_buff * 3335ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3336 3337/** 3338 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3339 * 3340 * This function returns the TKIP phase 1 key for the given IV32. 3341 * 3342 * @keyconf: the parameter passed with the set key 3343 * @iv32: IV32 to get the P1K for 3344 * @p1k: a buffer to which the key will be written, as 5 u16 values 3345 */ 3346void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3347 u32 iv32, u16 *p1k); 3348 3349/** 3350 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3351 * 3352 * This function returns the TKIP phase 1 key for the IV32 taken 3353 * from the given packet. 3354 * 3355 * @keyconf: the parameter passed with the set key 3356 * @skb: the packet to take the IV32 value from that will be encrypted 3357 * with this P1K 3358 * @p1k: a buffer to which the key will be written, as 5 u16 values 3359 */ 3360static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3361 struct sk_buff *skb, u16 *p1k) 3362{ 3363 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3364 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3365 u32 iv32 = get_unaligned_le32(&data[4]); 3366 3367 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3368} 3369 3370/** 3371 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3372 * 3373 * This function returns the TKIP phase 1 key for the given IV32 3374 * and transmitter address. 3375 * 3376 * @keyconf: the parameter passed with the set key 3377 * @ta: TA that will be used with the key 3378 * @iv32: IV32 to get the P1K for 3379 * @p1k: a buffer to which the key will be written, as 5 u16 values 3380 */ 3381void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3382 const u8 *ta, u32 iv32, u16 *p1k); 3383 3384/** 3385 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3386 * 3387 * This function computes the TKIP RC4 key for the IV values 3388 * in the packet. 3389 * 3390 * @keyconf: the parameter passed with the set key 3391 * @skb: the packet to take the IV32/IV16 values from that will be 3392 * encrypted with this key 3393 * @p2k: a buffer to which the key will be written, 16 bytes 3394 */ 3395void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3396 struct sk_buff *skb, u8 *p2k); 3397 3398/** 3399 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3400 * 3401 * This function computes the two AES-CMAC sub-keys, based on the 3402 * previously installed master key. 3403 * 3404 * @keyconf: the parameter passed with the set key 3405 * @k1: a buffer to be filled with the 1st sub-key 3406 * @k2: a buffer to be filled with the 2nd sub-key 3407 */ 3408void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3409 u8 *k1, u8 *k2); 3410 3411/** 3412 * struct ieee80211_key_seq - key sequence counter 3413 * 3414 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3415 * @ccmp: PN data, most significant byte first (big endian, 3416 * reverse order than in packet) 3417 * @aes_cmac: PN data, most significant byte first (big endian, 3418 * reverse order than in packet) 3419 */ 3420struct ieee80211_key_seq { 3421 union { 3422 struct { 3423 u32 iv32; 3424 u16 iv16; 3425 } tkip; 3426 struct { 3427 u8 pn[6]; 3428 } ccmp; 3429 struct { 3430 u8 pn[6]; 3431 } aes_cmac; 3432 }; 3433}; 3434 3435/** 3436 * ieee80211_get_key_tx_seq - get key TX sequence counter 3437 * 3438 * @keyconf: the parameter passed with the set key 3439 * @seq: buffer to receive the sequence data 3440 * 3441 * This function allows a driver to retrieve the current TX IV/PN 3442 * for the given key. It must not be called if IV generation is 3443 * offloaded to the device. 3444 * 3445 * Note that this function may only be called when no TX processing 3446 * can be done concurrently, for example when queues are stopped 3447 * and the stop has been synchronized. 3448 */ 3449void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3450 struct ieee80211_key_seq *seq); 3451 3452/** 3453 * ieee80211_get_key_rx_seq - get key RX sequence counter 3454 * 3455 * @keyconf: the parameter passed with the set key 3456 * @tid: The TID, or -1 for the management frame value (CCMP only); 3457 * the value on TID 0 is also used for non-QoS frames. For 3458 * CMAC, only TID 0 is valid. 3459 * @seq: buffer to receive the sequence data 3460 * 3461 * This function allows a driver to retrieve the current RX IV/PNs 3462 * for the given key. It must not be called if IV checking is done 3463 * by the device and not by mac80211. 3464 * 3465 * Note that this function may only be called when no RX processing 3466 * can be done concurrently. 3467 */ 3468void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3469 int tid, struct ieee80211_key_seq *seq); 3470 3471/** 3472 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3473 * @vif: virtual interface the rekeying was done on 3474 * @bssid: The BSSID of the AP, for checking association 3475 * @replay_ctr: the new replay counter after GTK rekeying 3476 * @gfp: allocation flags 3477 */ 3478void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3479 const u8 *replay_ctr, gfp_t gfp); 3480 3481/** 3482 * ieee80211_wake_queue - wake specific queue 3483 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3484 * @queue: queue number (counted from zero). 3485 * 3486 * Drivers should use this function instead of netif_wake_queue. 3487 */ 3488void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3489 3490/** 3491 * ieee80211_stop_queue - stop specific queue 3492 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3493 * @queue: queue number (counted from zero). 3494 * 3495 * Drivers should use this function instead of netif_stop_queue. 3496 */ 3497void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3498 3499/** 3500 * ieee80211_queue_stopped - test status of the queue 3501 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3502 * @queue: queue number (counted from zero). 3503 * 3504 * Drivers should use this function instead of netif_stop_queue. 3505 * 3506 * Return: %true if the queue is stopped. %false otherwise. 3507 */ 3508 3509int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3510 3511/** 3512 * ieee80211_stop_queues - stop all queues 3513 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3514 * 3515 * Drivers should use this function instead of netif_stop_queue. 3516 */ 3517void ieee80211_stop_queues(struct ieee80211_hw *hw); 3518 3519/** 3520 * ieee80211_wake_queues - wake all queues 3521 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3522 * 3523 * Drivers should use this function instead of netif_wake_queue. 3524 */ 3525void ieee80211_wake_queues(struct ieee80211_hw *hw); 3526 3527/** 3528 * ieee80211_scan_completed - completed hardware scan 3529 * 3530 * When hardware scan offload is used (i.e. the hw_scan() callback is 3531 * assigned) this function needs to be called by the driver to notify 3532 * mac80211 that the scan finished. This function can be called from 3533 * any context, including hardirq context. 3534 * 3535 * @hw: the hardware that finished the scan 3536 * @aborted: set to true if scan was aborted 3537 */ 3538void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3539 3540/** 3541 * ieee80211_sched_scan_results - got results from scheduled scan 3542 * 3543 * When a scheduled scan is running, this function needs to be called by the 3544 * driver whenever there are new scan results available. 3545 * 3546 * @hw: the hardware that is performing scheduled scans 3547 */ 3548void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3549 3550/** 3551 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3552 * 3553 * When a scheduled scan is running, this function can be called by 3554 * the driver if it needs to stop the scan to perform another task. 3555 * Usual scenarios are drivers that cannot continue the scheduled scan 3556 * while associating, for instance. 3557 * 3558 * @hw: the hardware that is performing scheduled scans 3559 */ 3560void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3561 3562/** 3563 * enum ieee80211_interface_iteration_flags - interface iteration flags 3564 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3565 * been added to the driver; However, note that during hardware 3566 * reconfiguration (after restart_hw) it will iterate over a new 3567 * interface and over all the existing interfaces even if they 3568 * haven't been re-added to the driver yet. 3569 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3570 * interfaces, even if they haven't been re-added to the driver yet. 3571 */ 3572enum ieee80211_interface_iteration_flags { 3573 IEEE80211_IFACE_ITER_NORMAL = 0, 3574 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3575}; 3576 3577/** 3578 * ieee80211_iterate_active_interfaces - iterate active interfaces 3579 * 3580 * This function iterates over the interfaces associated with a given 3581 * hardware that are currently active and calls the callback for them. 3582 * This function allows the iterator function to sleep, when the iterator 3583 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3584 * be used. 3585 * Does not iterate over a new interface during add_interface(). 3586 * 3587 * @hw: the hardware struct of which the interfaces should be iterated over 3588 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3589 * @iterator: the iterator function to call 3590 * @data: first argument of the iterator function 3591 */ 3592void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3593 u32 iter_flags, 3594 void (*iterator)(void *data, u8 *mac, 3595 struct ieee80211_vif *vif), 3596 void *data); 3597 3598/** 3599 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3600 * 3601 * This function iterates over the interfaces associated with a given 3602 * hardware that are currently active and calls the callback for them. 3603 * This function requires the iterator callback function to be atomic, 3604 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3605 * Does not iterate over a new interface during add_interface(). 3606 * 3607 * @hw: the hardware struct of which the interfaces should be iterated over 3608 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3609 * @iterator: the iterator function to call, cannot sleep 3610 * @data: first argument of the iterator function 3611 */ 3612void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3613 u32 iter_flags, 3614 void (*iterator)(void *data, 3615 u8 *mac, 3616 struct ieee80211_vif *vif), 3617 void *data); 3618 3619/** 3620 * ieee80211_queue_work - add work onto the mac80211 workqueue 3621 * 3622 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3623 * This helper ensures drivers are not queueing work when they should not be. 3624 * 3625 * @hw: the hardware struct for the interface we are adding work for 3626 * @work: the work we want to add onto the mac80211 workqueue 3627 */ 3628void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3629 3630/** 3631 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3632 * 3633 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3634 * workqueue. 3635 * 3636 * @hw: the hardware struct for the interface we are adding work for 3637 * @dwork: delayable work to queue onto the mac80211 workqueue 3638 * @delay: number of jiffies to wait before queueing 3639 */ 3640void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3641 struct delayed_work *dwork, 3642 unsigned long delay); 3643 3644/** 3645 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3646 * @sta: the station for which to start a BA session 3647 * @tid: the TID to BA on. 3648 * @timeout: session timeout value (in TUs) 3649 * 3650 * Return: success if addBA request was sent, failure otherwise 3651 * 3652 * Although mac80211/low level driver/user space application can estimate 3653 * the need to start aggregation on a certain RA/TID, the session level 3654 * will be managed by the mac80211. 3655 */ 3656int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3657 u16 timeout); 3658 3659/** 3660 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3661 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3662 * @ra: receiver address of the BA session recipient. 3663 * @tid: the TID to BA on. 3664 * 3665 * This function must be called by low level driver once it has 3666 * finished with preparations for the BA session. It can be called 3667 * from any context. 3668 */ 3669void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3670 u16 tid); 3671 3672/** 3673 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3674 * @sta: the station whose BA session to stop 3675 * @tid: the TID to stop BA. 3676 * 3677 * Return: negative error if the TID is invalid, or no aggregation active 3678 * 3679 * Although mac80211/low level driver/user space application can estimate 3680 * the need to stop aggregation on a certain RA/TID, the session level 3681 * will be managed by the mac80211. 3682 */ 3683int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3684 3685/** 3686 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3687 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3688 * @ra: receiver address of the BA session recipient. 3689 * @tid: the desired TID to BA on. 3690 * 3691 * This function must be called by low level driver once it has 3692 * finished with preparations for the BA session tear down. It 3693 * can be called from any context. 3694 */ 3695void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3696 u16 tid); 3697 3698/** 3699 * ieee80211_find_sta - find a station 3700 * 3701 * @vif: virtual interface to look for station on 3702 * @addr: station's address 3703 * 3704 * Return: The station, if found. %NULL otherwise. 3705 * 3706 * Note: This function must be called under RCU lock and the 3707 * resulting pointer is only valid under RCU lock as well. 3708 */ 3709struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3710 const u8 *addr); 3711 3712/** 3713 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3714 * 3715 * @hw: pointer as obtained from ieee80211_alloc_hw() 3716 * @addr: remote station's address 3717 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3718 * 3719 * Return: The station, if found. %NULL otherwise. 3720 * 3721 * Note: This function must be called under RCU lock and the 3722 * resulting pointer is only valid under RCU lock as well. 3723 * 3724 * NOTE: You may pass NULL for localaddr, but then you will just get 3725 * the first STA that matches the remote address 'addr'. 3726 * We can have multiple STA associated with multiple 3727 * logical stations (e.g. consider a station connecting to another 3728 * BSSID on the same AP hardware without disconnecting first). 3729 * In this case, the result of this method with localaddr NULL 3730 * is not reliable. 3731 * 3732 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3733 */ 3734struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3735 const u8 *addr, 3736 const u8 *localaddr); 3737 3738/** 3739 * ieee80211_sta_block_awake - block station from waking up 3740 * @hw: the hardware 3741 * @pubsta: the station 3742 * @block: whether to block or unblock 3743 * 3744 * Some devices require that all frames that are on the queues 3745 * for a specific station that went to sleep are flushed before 3746 * a poll response or frames after the station woke up can be 3747 * delivered to that it. Note that such frames must be rejected 3748 * by the driver as filtered, with the appropriate status flag. 3749 * 3750 * This function allows implementing this mode in a race-free 3751 * manner. 3752 * 3753 * To do this, a driver must keep track of the number of frames 3754 * still enqueued for a specific station. If this number is not 3755 * zero when the station goes to sleep, the driver must call 3756 * this function to force mac80211 to consider the station to 3757 * be asleep regardless of the station's actual state. Once the 3758 * number of outstanding frames reaches zero, the driver must 3759 * call this function again to unblock the station. That will 3760 * cause mac80211 to be able to send ps-poll responses, and if 3761 * the station queried in the meantime then frames will also 3762 * be sent out as a result of this. Additionally, the driver 3763 * will be notified that the station woke up some time after 3764 * it is unblocked, regardless of whether the station actually 3765 * woke up while blocked or not. 3766 */ 3767void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3768 struct ieee80211_sta *pubsta, bool block); 3769 3770/** 3771 * ieee80211_sta_eosp - notify mac80211 about end of SP 3772 * @pubsta: the station 3773 * 3774 * When a device transmits frames in a way that it can't tell 3775 * mac80211 in the TX status about the EOSP, it must clear the 3776 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3777 * This applies for PS-Poll as well as uAPSD. 3778 * 3779 * Note that there is no non-_irqsafe version right now as 3780 * it wasn't needed, but just like _tx_status() and _rx() 3781 * must not be mixed in irqsafe/non-irqsafe versions, this 3782 * function must not be mixed with those either. Use the 3783 * all irqsafe, or all non-irqsafe, don't mix! If you need 3784 * the non-irqsafe version of this, you need to add it. 3785 */ 3786void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3787 3788/** 3789 * ieee80211_iter_keys - iterate keys programmed into the device 3790 * @hw: pointer obtained from ieee80211_alloc_hw() 3791 * @vif: virtual interface to iterate, may be %NULL for all 3792 * @iter: iterator function that will be called for each key 3793 * @iter_data: custom data to pass to the iterator function 3794 * 3795 * This function can be used to iterate all the keys known to 3796 * mac80211, even those that weren't previously programmed into 3797 * the device. This is intended for use in WoWLAN if the device 3798 * needs reprogramming of the keys during suspend. Note that due 3799 * to locking reasons, it is also only safe to call this at few 3800 * spots since it must hold the RTNL and be able to sleep. 3801 * 3802 * The order in which the keys are iterated matches the order 3803 * in which they were originally installed and handed to the 3804 * set_key callback. 3805 */ 3806void ieee80211_iter_keys(struct ieee80211_hw *hw, 3807 struct ieee80211_vif *vif, 3808 void (*iter)(struct ieee80211_hw *hw, 3809 struct ieee80211_vif *vif, 3810 struct ieee80211_sta *sta, 3811 struct ieee80211_key_conf *key, 3812 void *data), 3813 void *iter_data); 3814 3815/** 3816 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 3817 * @hw: pointre obtained from ieee80211_alloc_hw(). 3818 * @iter: iterator function 3819 * @iter_data: data passed to iterator function 3820 * 3821 * Iterate all active channel contexts. This function is atomic and 3822 * doesn't acquire any locks internally that might be held in other 3823 * places while calling into the driver. 3824 * 3825 * The iterator will not find a context that's being added (during 3826 * the driver callback to add it) but will find it while it's being 3827 * removed. 3828 * 3829 * Note that during hardware restart, all contexts that existed 3830 * before the restart are considered already present so will be 3831 * found while iterating, whether they've been re-added already 3832 * or not. 3833 */ 3834void ieee80211_iter_chan_contexts_atomic( 3835 struct ieee80211_hw *hw, 3836 void (*iter)(struct ieee80211_hw *hw, 3837 struct ieee80211_chanctx_conf *chanctx_conf, 3838 void *data), 3839 void *iter_data); 3840 3841/** 3842 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3843 * @hw: pointer obtained from ieee80211_alloc_hw(). 3844 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3845 * 3846 * Creates a Probe Request template which can, for example, be uploaded to 3847 * hardware. The template is filled with bssid, ssid and supported rate 3848 * information. This function must only be called from within the 3849 * .bss_info_changed callback function and only in managed mode. The function 3850 * is only useful when the interface is associated, otherwise it will return 3851 * %NULL. 3852 * 3853 * Return: The Probe Request template. %NULL on error. 3854 */ 3855struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3856 struct ieee80211_vif *vif); 3857 3858/** 3859 * ieee80211_beacon_loss - inform hardware does not receive beacons 3860 * 3861 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3862 * 3863 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3864 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3865 * hardware is not receiving beacons with this function. 3866 */ 3867void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3868 3869/** 3870 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3871 * 3872 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3873 * 3874 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3875 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3876 * needs to inform if the connection to the AP has been lost. 3877 * 3878 * This function will cause immediate change to disassociated state, 3879 * without connection recovery attempts. 3880 */ 3881void ieee80211_connection_loss(struct ieee80211_vif *vif); 3882 3883/** 3884 * ieee80211_resume_disconnect - disconnect from AP after resume 3885 * 3886 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3887 * 3888 * Instructs mac80211 to disconnect from the AP after resume. 3889 * Drivers can use this after WoWLAN if they know that the 3890 * connection cannot be kept up, for example because keys were 3891 * used while the device was asleep but the replay counters or 3892 * similar cannot be retrieved from the device during resume. 3893 * 3894 * Note that due to implementation issues, if the driver uses 3895 * the reconfiguration functionality during resume the interface 3896 * will still be added as associated first during resume and then 3897 * disconnect normally later. 3898 * 3899 * This function can only be called from the resume callback and 3900 * the driver must not be holding any of its own locks while it 3901 * calls this function, or at least not any locks it needs in the 3902 * key configuration paths (if it supports HW crypto). 3903 */ 3904void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3905 3906/** 3907 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3908 * 3909 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3910 * 3911 * Some hardware require full power save to manage simultaneous BT traffic 3912 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3913 * burst of BT traffic. The hardware gets information of BT traffic via 3914 * hardware co-existence lines, and consequentially requests mac80211 to 3915 * (temporarily) enter full psm. 3916 * This function will only temporarily disable dynamic PS, not enable PSM if 3917 * it was not already enabled. 3918 * The driver must make sure to re-enable dynamic PS using 3919 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3920 * 3921 */ 3922void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3923 3924/** 3925 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3926 * 3927 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3928 * 3929 * This function restores dynamic PS after being temporarily disabled via 3930 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3931 * be coupled with an eventual call to this function. 3932 * 3933 */ 3934void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3935 3936/** 3937 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3938 * rssi threshold triggered 3939 * 3940 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3941 * @rssi_event: the RSSI trigger event type 3942 * @gfp: context flags 3943 * 3944 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3945 * monitoring is configured with an rssi threshold, the driver will inform 3946 * whenever the rssi level reaches the threshold. 3947 */ 3948void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3949 enum nl80211_cqm_rssi_threshold_event rssi_event, 3950 gfp_t gfp); 3951 3952/** 3953 * ieee80211_chswitch_done - Complete channel switch process 3954 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3955 * @success: make the channel switch successful or not 3956 * 3957 * Complete the channel switch post-process: set the new operational channel 3958 * and wake up the suspended queues. 3959 */ 3960void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3961 3962/** 3963 * ieee80211_request_smps - request SM PS transition 3964 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3965 * @smps_mode: new SM PS mode 3966 * 3967 * This allows the driver to request an SM PS transition in managed 3968 * mode. This is useful when the driver has more information than 3969 * the stack about possible interference, for example by bluetooth. 3970 */ 3971void ieee80211_request_smps(struct ieee80211_vif *vif, 3972 enum ieee80211_smps_mode smps_mode); 3973 3974/** 3975 * ieee80211_ready_on_channel - notification of remain-on-channel start 3976 * @hw: pointer as obtained from ieee80211_alloc_hw() 3977 */ 3978void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3979 3980/** 3981 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3982 * @hw: pointer as obtained from ieee80211_alloc_hw() 3983 */ 3984void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3985 3986/** 3987 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3988 * 3989 * in order not to harm the system performance and user experience, the device 3990 * may request not to allow any rx ba session and tear down existing rx ba 3991 * sessions based on system constraints such as periodic BT activity that needs 3992 * to limit wlan activity (eg.sco or a2dp)." 3993 * in such cases, the intention is to limit the duration of the rx ppdu and 3994 * therefore prevent the peer device to use a-mpdu aggregation. 3995 * 3996 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3997 * @ba_rx_bitmap: Bit map of open rx ba per tid 3998 * @addr: & to bssid mac address 3999 */ 4000void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4001 const u8 *addr); 4002 4003/** 4004 * ieee80211_send_bar - send a BlockAckReq frame 4005 * 4006 * can be used to flush pending frames from the peer's aggregation reorder 4007 * buffer. 4008 * 4009 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4010 * @ra: the peer's destination address 4011 * @tid: the TID of the aggregation session 4012 * @ssn: the new starting sequence number for the receiver 4013 */ 4014void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4015 4016/* Rate control API */ 4017 4018/** 4019 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4020 * 4021 * @hw: The hardware the algorithm is invoked for. 4022 * @sband: The band this frame is being transmitted on. 4023 * @bss_conf: the current BSS configuration 4024 * @skb: the skb that will be transmitted, the control information in it needs 4025 * to be filled in 4026 * @reported_rate: The rate control algorithm can fill this in to indicate 4027 * which rate should be reported to userspace as the current rate and 4028 * used for rate calculations in the mesh network. 4029 * @rts: whether RTS will be used for this frame because it is longer than the 4030 * RTS threshold 4031 * @short_preamble: whether mac80211 will request short-preamble transmission 4032 * if the selected rate supports it 4033 * @max_rate_idx: user-requested maximum (legacy) rate 4034 * (deprecated; this will be removed once drivers get updated to use 4035 * rate_idx_mask) 4036 * @rate_idx_mask: user-requested (legacy) rate mask 4037 * @rate_idx_mcs_mask: user-requested MCS rate mask 4038 * @bss: whether this frame is sent out in AP or IBSS mode 4039 */ 4040struct ieee80211_tx_rate_control { 4041 struct ieee80211_hw *hw; 4042 struct ieee80211_supported_band *sband; 4043 struct ieee80211_bss_conf *bss_conf; 4044 struct sk_buff *skb; 4045 struct ieee80211_tx_rate reported_rate; 4046 bool rts, short_preamble; 4047 u8 max_rate_idx; 4048 u32 rate_idx_mask; 4049 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 4050 bool bss; 4051}; 4052 4053struct rate_control_ops { 4054 struct module *module; 4055 const char *name; 4056 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4057 void (*free)(void *priv); 4058 4059 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4060 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4061 struct ieee80211_sta *sta, void *priv_sta); 4062 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4063 struct ieee80211_sta *sta, void *priv_sta, 4064 u32 changed); 4065 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4066 void *priv_sta); 4067 4068 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4069 struct ieee80211_sta *sta, void *priv_sta, 4070 struct sk_buff *skb); 4071 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4072 struct ieee80211_tx_rate_control *txrc); 4073 4074 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4075 struct dentry *dir); 4076 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4077}; 4078 4079static inline int rate_supported(struct ieee80211_sta *sta, 4080 enum ieee80211_band band, 4081 int index) 4082{ 4083 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4084} 4085 4086/** 4087 * rate_control_send_low - helper for drivers for management/no-ack frames 4088 * 4089 * Rate control algorithms that agree to use the lowest rate to 4090 * send management frames and NO_ACK data with the respective hw 4091 * retries should use this in the beginning of their mac80211 get_rate 4092 * callback. If true is returned the rate control can simply return. 4093 * If false is returned we guarantee that sta and sta and priv_sta is 4094 * not null. 4095 * 4096 * Rate control algorithms wishing to do more intelligent selection of 4097 * rate for multicast/broadcast frames may choose to not use this. 4098 * 4099 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4100 * that this may be null. 4101 * @priv_sta: private rate control structure. This may be null. 4102 * @txrc: rate control information we sholud populate for mac80211. 4103 */ 4104bool rate_control_send_low(struct ieee80211_sta *sta, 4105 void *priv_sta, 4106 struct ieee80211_tx_rate_control *txrc); 4107 4108 4109static inline s8 4110rate_lowest_index(struct ieee80211_supported_band *sband, 4111 struct ieee80211_sta *sta) 4112{ 4113 int i; 4114 4115 for (i = 0; i < sband->n_bitrates; i++) 4116 if (rate_supported(sta, sband->band, i)) 4117 return i; 4118 4119 /* warn when we cannot find a rate. */ 4120 WARN_ON_ONCE(1); 4121 4122 /* and return 0 (the lowest index) */ 4123 return 0; 4124} 4125 4126static inline 4127bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4128 struct ieee80211_sta *sta) 4129{ 4130 unsigned int i; 4131 4132 for (i = 0; i < sband->n_bitrates; i++) 4133 if (rate_supported(sta, sband->band, i)) 4134 return true; 4135 return false; 4136} 4137 4138int ieee80211_rate_control_register(struct rate_control_ops *ops); 4139void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4140 4141static inline bool 4142conf_is_ht20(struct ieee80211_conf *conf) 4143{ 4144 return conf->channel_type == NL80211_CHAN_HT20; 4145} 4146 4147static inline bool 4148conf_is_ht40_minus(struct ieee80211_conf *conf) 4149{ 4150 return conf->channel_type == NL80211_CHAN_HT40MINUS; 4151} 4152 4153static inline bool 4154conf_is_ht40_plus(struct ieee80211_conf *conf) 4155{ 4156 return conf->channel_type == NL80211_CHAN_HT40PLUS; 4157} 4158 4159static inline bool 4160conf_is_ht40(struct ieee80211_conf *conf) 4161{ 4162 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 4163} 4164 4165static inline bool 4166conf_is_ht(struct ieee80211_conf *conf) 4167{ 4168 return conf->channel_type != NL80211_CHAN_NO_HT; 4169} 4170 4171static inline enum nl80211_iftype 4172ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4173{ 4174 if (p2p) { 4175 switch (type) { 4176 case NL80211_IFTYPE_STATION: 4177 return NL80211_IFTYPE_P2P_CLIENT; 4178 case NL80211_IFTYPE_AP: 4179 return NL80211_IFTYPE_P2P_GO; 4180 default: 4181 break; 4182 } 4183 } 4184 return type; 4185} 4186 4187static inline enum nl80211_iftype 4188ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4189{ 4190 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4191} 4192 4193void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4194 int rssi_min_thold, 4195 int rssi_max_thold); 4196 4197void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4198 4199/** 4200 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4201 * 4202 * @vif: the specified virtual interface 4203 * 4204 * Note: This function assumes that the given vif is valid. 4205 * 4206 * Return: The average RSSI value for the requested interface, or 0 if not 4207 * applicable. 4208 */ 4209int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4210 4211/** 4212 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4213 * @vif: virtual interface 4214 * @wakeup: wakeup reason(s) 4215 * @gfp: allocation flags 4216 * 4217 * See cfg80211_report_wowlan_wakeup(). 4218 */ 4219void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4220 struct cfg80211_wowlan_wakeup *wakeup, 4221 gfp_t gfp); 4222 4223#endif /* MAC80211_H */ 4224