mac80211.h revision b207cdb07f3f01ec1adaac62e9d0cc918c60a81a
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_MLME_CONN_TX: This frame was transmitted by the MLME 412 * code for connection establishment, this indicates that its status 413 * should kick the MLME state machine. 414 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 415 * MLME command (internal to mac80211 to figure out whether to send TX 416 * status to user space) 417 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 418 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 419 * frame and selects the maximum number of streams that it can use. 420 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 421 * the off-channel channel when a remain-on-channel offload is done 422 * in hardware -- normal packets still flow and are expected to be 423 * handled properly by the device. 424 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 425 * testing. It will be sent out with incorrect Michael MIC key to allow 426 * TKIP countermeasures to be tested. 427 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 428 * This flag is actually used for management frame especially for P2P 429 * frames not being sent at CCK rate in 2GHz band. 430 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 431 * when its status is reported the service period ends. For frames in 432 * an SP that mac80211 transmits, it is already set; for driver frames 433 * the driver may set this flag. It is also used to do the same for 434 * PS-Poll responses. 435 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 436 * This flag is used to send nullfunc frame at minimum rate when 437 * the nullfunc is used for connection monitoring purpose. 438 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 439 * would be fragmented by size (this is optional, only used for 440 * monitor injection). 441 * 442 * Note: If you have to add new flags to the enumeration, then don't 443 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 444 */ 445enum mac80211_tx_control_flags { 446 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 447 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 448 IEEE80211_TX_CTL_NO_ACK = BIT(2), 449 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 450 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 451 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 452 IEEE80211_TX_CTL_AMPDU = BIT(6), 453 IEEE80211_TX_CTL_INJECTED = BIT(7), 454 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 455 IEEE80211_TX_STAT_ACK = BIT(9), 456 IEEE80211_TX_STAT_AMPDU = BIT(10), 457 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 458 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 459 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 460 IEEE80211_TX_INTFL_RETRIED = BIT(15), 461 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 462 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 463 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 464 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 465 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 466 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 467 IEEE80211_TX_CTL_LDPC = BIT(22), 468 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 469 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 470 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 471 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 472 IEEE80211_TX_STATUS_EOSP = BIT(28), 473 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 474 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 475}; 476 477#define IEEE80211_TX_CTL_STBC_SHIFT 23 478 479/* 480 * This definition is used as a mask to clear all temporary flags, which are 481 * set by the tx handlers for each transmission attempt by the mac80211 stack. 482 */ 483#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 484 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 485 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 486 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 487 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 488 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 489 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 490 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 491 492/** 493 * enum mac80211_rate_control_flags - per-rate flags set by the 494 * Rate Control algorithm. 495 * 496 * These flags are set by the Rate control algorithm for each rate during tx, 497 * in the @flags member of struct ieee80211_tx_rate. 498 * 499 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 500 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 501 * This is set if the current BSS requires ERP protection. 502 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 503 * @IEEE80211_TX_RC_MCS: HT rate. 504 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 505 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 506 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 507 * Greenfield mode. 508 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 509 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 510 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 511 * (80+80 isn't supported yet) 512 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 513 * adjacent 20 MHz channels, if the current channel type is 514 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 515 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 516 */ 517enum mac80211_rate_control_flags { 518 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 519 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 520 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 521 522 /* rate index is an HT/VHT MCS instead of an index */ 523 IEEE80211_TX_RC_MCS = BIT(3), 524 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 525 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 526 IEEE80211_TX_RC_DUP_DATA = BIT(6), 527 IEEE80211_TX_RC_SHORT_GI = BIT(7), 528 IEEE80211_TX_RC_VHT_MCS = BIT(8), 529 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 530 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 531}; 532 533 534/* there are 40 bytes if you don't need the rateset to be kept */ 535#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 536 537/* if you do need the rateset, then you have less space */ 538#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 539 540/* maximum number of rate stages */ 541#define IEEE80211_TX_MAX_RATES 4 542 543/** 544 * struct ieee80211_tx_rate - rate selection/status 545 * 546 * @idx: rate index to attempt to send with 547 * @flags: rate control flags (&enum mac80211_rate_control_flags) 548 * @count: number of tries in this rate before going to the next rate 549 * 550 * A value of -1 for @idx indicates an invalid rate and, if used 551 * in an array of retry rates, that no more rates should be tried. 552 * 553 * When used for transmit status reporting, the driver should 554 * always report the rate along with the flags it used. 555 * 556 * &struct ieee80211_tx_info contains an array of these structs 557 * in the control information, and it will be filled by the rate 558 * control algorithm according to what should be sent. For example, 559 * if this array contains, in the format { <idx>, <count> } the 560 * information 561 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 562 * then this means that the frame should be transmitted 563 * up to twice at rate 3, up to twice at rate 2, and up to four 564 * times at rate 1 if it doesn't get acknowledged. Say it gets 565 * acknowledged by the peer after the fifth attempt, the status 566 * information should then contain 567 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 568 * since it was transmitted twice at rate 3, twice at rate 2 569 * and once at rate 1 after which we received an acknowledgement. 570 */ 571struct ieee80211_tx_rate { 572 s8 idx; 573 u16 count:5, 574 flags:11; 575} __packed; 576 577#define IEEE80211_MAX_TX_RETRY 31 578 579static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 580 u8 mcs, u8 nss) 581{ 582 WARN_ON(mcs & ~0xF); 583 WARN_ON(nss & ~0x7); 584 rate->idx = (nss << 4) | mcs; 585} 586 587static inline u8 588ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 589{ 590 return rate->idx & 0xF; 591} 592 593static inline u8 594ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 595{ 596 return rate->idx >> 4; 597} 598 599/** 600 * struct ieee80211_tx_info - skb transmit information 601 * 602 * This structure is placed in skb->cb for three uses: 603 * (1) mac80211 TX control - mac80211 tells the driver what to do 604 * (2) driver internal use (if applicable) 605 * (3) TX status information - driver tells mac80211 what happened 606 * 607 * @flags: transmit info flags, defined above 608 * @band: the band to transmit on (use for checking for races) 609 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 610 * @ack_frame_id: internal frame ID for TX status, used internally 611 * @control: union for control data 612 * @status: union for status data 613 * @driver_data: array of driver_data pointers 614 * @ampdu_ack_len: number of acked aggregated frames. 615 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 616 * @ampdu_len: number of aggregated frames. 617 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 618 * @ack_signal: signal strength of the ACK frame 619 */ 620struct ieee80211_tx_info { 621 /* common information */ 622 u32 flags; 623 u8 band; 624 625 u8 hw_queue; 626 627 u16 ack_frame_id; 628 629 union { 630 struct { 631 union { 632 /* rate control */ 633 struct { 634 struct ieee80211_tx_rate rates[ 635 IEEE80211_TX_MAX_RATES]; 636 s8 rts_cts_rate_idx; 637 /* 3 bytes free */ 638 }; 639 /* only needed before rate control */ 640 unsigned long jiffies; 641 }; 642 /* NB: vif can be NULL for injected frames */ 643 struct ieee80211_vif *vif; 644 struct ieee80211_key_conf *hw_key; 645 /* 8 bytes free */ 646 } control; 647 struct { 648 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 649 int ack_signal; 650 u8 ampdu_ack_len; 651 u8 ampdu_len; 652 u8 antenna; 653 /* 21 bytes free */ 654 } status; 655 struct { 656 struct ieee80211_tx_rate driver_rates[ 657 IEEE80211_TX_MAX_RATES]; 658 void *rate_driver_data[ 659 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 660 }; 661 void *driver_data[ 662 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 663 }; 664}; 665 666/** 667 * struct ieee80211_sched_scan_ies - scheduled scan IEs 668 * 669 * This structure is used to pass the appropriate IEs to be used in scheduled 670 * scans for all bands. It contains both the IEs passed from the userspace 671 * and the ones generated by mac80211. 672 * 673 * @ie: array with the IEs for each supported band 674 * @len: array with the total length of the IEs for each band 675 */ 676struct ieee80211_sched_scan_ies { 677 u8 *ie[IEEE80211_NUM_BANDS]; 678 size_t len[IEEE80211_NUM_BANDS]; 679}; 680 681static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 682{ 683 return (struct ieee80211_tx_info *)skb->cb; 684} 685 686static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 687{ 688 return (struct ieee80211_rx_status *)skb->cb; 689} 690 691/** 692 * ieee80211_tx_info_clear_status - clear TX status 693 * 694 * @info: The &struct ieee80211_tx_info to be cleared. 695 * 696 * When the driver passes an skb back to mac80211, it must report 697 * a number of things in TX status. This function clears everything 698 * in the TX status but the rate control information (it does clear 699 * the count since you need to fill that in anyway). 700 * 701 * NOTE: You can only use this function if you do NOT use 702 * info->driver_data! Use info->rate_driver_data 703 * instead if you need only the less space that allows. 704 */ 705static inline void 706ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 707{ 708 int i; 709 710 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 711 offsetof(struct ieee80211_tx_info, control.rates)); 712 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 713 offsetof(struct ieee80211_tx_info, driver_rates)); 714 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 715 /* clear the rate counts */ 716 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 717 info->status.rates[i].count = 0; 718 719 BUILD_BUG_ON( 720 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 721 memset(&info->status.ampdu_ack_len, 0, 722 sizeof(struct ieee80211_tx_info) - 723 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 724} 725 726 727/** 728 * enum mac80211_rx_flags - receive flags 729 * 730 * These flags are used with the @flag member of &struct ieee80211_rx_status. 731 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 732 * Use together with %RX_FLAG_MMIC_STRIPPED. 733 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 734 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 735 * verification has been done by the hardware. 736 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 737 * If this flag is set, the stack cannot do any replay detection 738 * hence the driver or hardware will have to do that. 739 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 740 * the frame. 741 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 742 * the frame. 743 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 744 * field) is valid and contains the time the first symbol of the MPDU 745 * was received. This is useful in monitor mode and for proper IBSS 746 * merging. 747 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 748 * field) is valid and contains the time the last symbol of the MPDU 749 * (including FCS) was received. 750 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 751 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 752 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 753 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 754 * @RX_FLAG_80MHZ: 80 MHz was used 755 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 756 * @RX_FLAG_160MHZ: 160 MHz was used 757 * @RX_FLAG_SHORT_GI: Short guard interval was used 758 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 759 * Valid only for data frames (mainly A-MPDU) 760 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 761 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 762 * to hw.radiotap_mcs_details to advertise that fact 763 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 764 * number (@ampdu_reference) must be populated and be a distinct number for 765 * each A-MPDU 766 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 767 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 768 * monitoring purposes only 769 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 770 * subframes of a single A-MPDU 771 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 772 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 773 * on this subframe 774 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 775 * is stored in the @ampdu_delimiter_crc field) 776 */ 777enum mac80211_rx_flags { 778 RX_FLAG_MMIC_ERROR = BIT(0), 779 RX_FLAG_DECRYPTED = BIT(1), 780 RX_FLAG_MMIC_STRIPPED = BIT(3), 781 RX_FLAG_IV_STRIPPED = BIT(4), 782 RX_FLAG_FAILED_FCS_CRC = BIT(5), 783 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 784 RX_FLAG_MACTIME_START = BIT(7), 785 RX_FLAG_SHORTPRE = BIT(8), 786 RX_FLAG_HT = BIT(9), 787 RX_FLAG_40MHZ = BIT(10), 788 RX_FLAG_SHORT_GI = BIT(11), 789 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 790 RX_FLAG_HT_GF = BIT(13), 791 RX_FLAG_AMPDU_DETAILS = BIT(14), 792 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 793 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 794 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 795 RX_FLAG_AMPDU_IS_LAST = BIT(18), 796 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 797 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 798 RX_FLAG_MACTIME_END = BIT(21), 799 RX_FLAG_VHT = BIT(22), 800 RX_FLAG_80MHZ = BIT(23), 801 RX_FLAG_80P80MHZ = BIT(24), 802 RX_FLAG_160MHZ = BIT(25), 803}; 804 805/** 806 * struct ieee80211_rx_status - receive status 807 * 808 * The low-level driver should provide this information (the subset 809 * supported by hardware) to the 802.11 code with each received 810 * frame, in the skb's control buffer (cb). 811 * 812 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 813 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 814 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 815 * it but can store it and pass it back to the driver for synchronisation 816 * @band: the active band when this frame was received 817 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 818 * @signal: signal strength when receiving this frame, either in dBm, in dB or 819 * unspecified depending on the hardware capabilities flags 820 * @IEEE80211_HW_SIGNAL_* 821 * @antenna: antenna used 822 * @rate_idx: index of data rate into band's supported rates or MCS index if 823 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 824 * @vht_nss: number of streams (VHT only) 825 * @flag: %RX_FLAG_* 826 * @rx_flags: internal RX flags for mac80211 827 * @ampdu_reference: A-MPDU reference number, must be a different value for 828 * each A-MPDU but the same for each subframe within one A-MPDU 829 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 830 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 831 * @vendor_radiotap_len: radiotap vendor namespace length 832 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 833 * that the actual data must be at the start of the SKB data 834 * already. 835 * @vendor_radiotap_oui: radiotap vendor namespace OUI 836 * @vendor_radiotap_subns: radiotap vendor sub namespace 837 */ 838struct ieee80211_rx_status { 839 u64 mactime; 840 u32 device_timestamp; 841 u32 ampdu_reference; 842 u32 flag; 843 u32 vendor_radiotap_bitmap; 844 u16 vendor_radiotap_len; 845 u16 freq; 846 u8 rate_idx; 847 u8 vht_nss; 848 u8 rx_flags; 849 u8 band; 850 u8 antenna; 851 s8 signal; 852 u8 ampdu_delimiter_crc; 853 u8 vendor_radiotap_align; 854 u8 vendor_radiotap_oui[3]; 855 u8 vendor_radiotap_subns; 856}; 857 858/** 859 * enum ieee80211_conf_flags - configuration flags 860 * 861 * Flags to define PHY configuration options 862 * 863 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 864 * to determine for example whether to calculate timestamps for packets 865 * or not, do not use instead of filter flags! 866 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 867 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 868 * meaning that the hardware still wakes up for beacons, is able to 869 * transmit frames and receive the possible acknowledgment frames. 870 * Not to be confused with hardware specific wakeup/sleep states, 871 * driver is responsible for that. See the section "Powersave support" 872 * for more. 873 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 874 * the driver should be prepared to handle configuration requests but 875 * may turn the device off as much as possible. Typically, this flag will 876 * be set when an interface is set UP but not associated or scanning, but 877 * it can also be unset in that case when monitor interfaces are active. 878 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 879 * operating channel. 880 */ 881enum ieee80211_conf_flags { 882 IEEE80211_CONF_MONITOR = (1<<0), 883 IEEE80211_CONF_PS = (1<<1), 884 IEEE80211_CONF_IDLE = (1<<2), 885 IEEE80211_CONF_OFFCHANNEL = (1<<3), 886}; 887 888 889/** 890 * enum ieee80211_conf_changed - denotes which configuration changed 891 * 892 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 893 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 894 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 895 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 896 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 897 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 898 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 899 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 900 * Note that this is only valid if channel contexts are not used, 901 * otherwise each channel context has the number of chains listed. 902 */ 903enum ieee80211_conf_changed { 904 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 905 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 906 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 907 IEEE80211_CONF_CHANGE_PS = BIT(4), 908 IEEE80211_CONF_CHANGE_POWER = BIT(5), 909 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 910 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 911 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 912}; 913 914/** 915 * enum ieee80211_smps_mode - spatial multiplexing power save mode 916 * 917 * @IEEE80211_SMPS_AUTOMATIC: automatic 918 * @IEEE80211_SMPS_OFF: off 919 * @IEEE80211_SMPS_STATIC: static 920 * @IEEE80211_SMPS_DYNAMIC: dynamic 921 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 922 */ 923enum ieee80211_smps_mode { 924 IEEE80211_SMPS_AUTOMATIC, 925 IEEE80211_SMPS_OFF, 926 IEEE80211_SMPS_STATIC, 927 IEEE80211_SMPS_DYNAMIC, 928 929 /* keep last */ 930 IEEE80211_SMPS_NUM_MODES, 931}; 932 933/** 934 * struct ieee80211_conf - configuration of the device 935 * 936 * This struct indicates how the driver shall configure the hardware. 937 * 938 * @flags: configuration flags defined above 939 * 940 * @listen_interval: listen interval in units of beacon interval 941 * @max_sleep_period: the maximum number of beacon intervals to sleep for 942 * before checking the beacon for a TIM bit (managed mode only); this 943 * value will be only achievable between DTIM frames, the hardware 944 * needs to check for the multicast traffic bit in DTIM beacons. 945 * This variable is valid only when the CONF_PS flag is set. 946 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 947 * in power saving. Power saving will not be enabled until a beacon 948 * has been received and the DTIM period is known. 949 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 950 * powersave documentation below. This variable is valid only when 951 * the CONF_PS flag is set. 952 * 953 * @power_level: requested transmit power (in dBm), backward compatibility 954 * value only that is set to the minimum of all interfaces 955 * 956 * @channel: the channel to tune to 957 * @channel_type: the channel (HT) type 958 * 959 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 960 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 961 * but actually means the number of transmissions not the number of retries 962 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 963 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 964 * number of transmissions not the number of retries 965 * 966 * @smps_mode: spatial multiplexing powersave mode; note that 967 * %IEEE80211_SMPS_STATIC is used when the device is not 968 * configured for an HT channel. 969 * Note that this is only valid if channel contexts are not used, 970 * otherwise each channel context has the number of chains listed. 971 */ 972struct ieee80211_conf { 973 u32 flags; 974 int power_level, dynamic_ps_timeout; 975 int max_sleep_period; 976 977 u16 listen_interval; 978 u8 ps_dtim_period; 979 980 u8 long_frame_max_tx_count, short_frame_max_tx_count; 981 982 struct ieee80211_channel *channel; 983 enum nl80211_channel_type channel_type; 984 enum ieee80211_smps_mode smps_mode; 985}; 986 987/** 988 * struct ieee80211_channel_switch - holds the channel switch data 989 * 990 * The information provided in this structure is required for channel switch 991 * operation. 992 * 993 * @timestamp: value in microseconds of the 64-bit Time Synchronization 994 * Function (TSF) timer when the frame containing the channel switch 995 * announcement was received. This is simply the rx.mactime parameter 996 * the driver passed into mac80211. 997 * @block_tx: Indicates whether transmission must be blocked before the 998 * scheduled channel switch, as indicated by the AP. 999 * @channel: the new channel to switch to 1000 * @count: the number of TBTT's until the channel switch event 1001 */ 1002struct ieee80211_channel_switch { 1003 u64 timestamp; 1004 bool block_tx; 1005 struct ieee80211_channel *channel; 1006 u8 count; 1007}; 1008 1009/** 1010 * enum ieee80211_vif_flags - virtual interface flags 1011 * 1012 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1013 * on this virtual interface to avoid unnecessary CPU wakeups 1014 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1015 * monitoring on this virtual interface -- i.e. it can monitor 1016 * connection quality related parameters, such as the RSSI level and 1017 * provide notifications if configured trigger levels are reached. 1018 */ 1019enum ieee80211_vif_flags { 1020 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1021 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1022}; 1023 1024/** 1025 * struct ieee80211_vif - per-interface data 1026 * 1027 * Data in this structure is continually present for driver 1028 * use during the life of a virtual interface. 1029 * 1030 * @type: type of this virtual interface 1031 * @bss_conf: BSS configuration for this interface, either our own 1032 * or the BSS we're associated to 1033 * @addr: address of this interface 1034 * @p2p: indicates whether this AP or STA interface is a p2p 1035 * interface, i.e. a GO or p2p-sta respectively 1036 * @driver_flags: flags/capabilities the driver has for this interface, 1037 * these need to be set (or cleared) when the interface is added 1038 * or, if supported by the driver, the interface type is changed 1039 * at runtime, mac80211 will never touch this field 1040 * @hw_queue: hardware queue for each AC 1041 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1042 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1043 * when it is not assigned. This pointer is RCU-protected due to the TX 1044 * path needing to access it; even though the netdev carrier will always 1045 * be off when it is %NULL there can still be races and packets could be 1046 * processed after it switches back to %NULL. 1047 * @drv_priv: data area for driver use, will always be aligned to 1048 * sizeof(void *). 1049 */ 1050struct ieee80211_vif { 1051 enum nl80211_iftype type; 1052 struct ieee80211_bss_conf bss_conf; 1053 u8 addr[ETH_ALEN]; 1054 bool p2p; 1055 1056 u8 cab_queue; 1057 u8 hw_queue[IEEE80211_NUM_ACS]; 1058 1059 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1060 1061 u32 driver_flags; 1062 1063 /* must be last */ 1064 u8 drv_priv[0] __aligned(sizeof(void *)); 1065}; 1066 1067static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1068{ 1069#ifdef CONFIG_MAC80211_MESH 1070 return vif->type == NL80211_IFTYPE_MESH_POINT; 1071#endif 1072 return false; 1073} 1074 1075/** 1076 * enum ieee80211_key_flags - key flags 1077 * 1078 * These flags are used for communication about keys between the driver 1079 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1080 * 1081 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 1082 * that the STA this key will be used with could be using QoS. 1083 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1084 * driver to indicate that it requires IV generation for this 1085 * particular key. 1086 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1087 * the driver for a TKIP key if it requires Michael MIC 1088 * generation in software. 1089 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1090 * that the key is pairwise rather then a shared key. 1091 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1092 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1093 * be done in software. 1094 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1095 * if space should be prepared for the IV, but the IV 1096 * itself should not be generated. Do not set together with 1097 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1098 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1099 * management frames. The flag can help drivers that have a hardware 1100 * crypto implementation that doesn't deal with management frames 1101 * properly by allowing them to not upload the keys to hardware and 1102 * fall back to software crypto. Note that this flag deals only with 1103 * RX, if your crypto engine can't deal with TX you can also set the 1104 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1105 */ 1106enum ieee80211_key_flags { 1107 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 1108 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1109 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1110 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1111 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1112 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1113 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1114}; 1115 1116/** 1117 * struct ieee80211_key_conf - key information 1118 * 1119 * This key information is given by mac80211 to the driver by 1120 * the set_key() callback in &struct ieee80211_ops. 1121 * 1122 * @hw_key_idx: To be set by the driver, this is the key index the driver 1123 * wants to be given when a frame is transmitted and needs to be 1124 * encrypted in hardware. 1125 * @cipher: The key's cipher suite selector. 1126 * @flags: key flags, see &enum ieee80211_key_flags. 1127 * @keyidx: the key index (0-3) 1128 * @keylen: key material length 1129 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1130 * data block: 1131 * - Temporal Encryption Key (128 bits) 1132 * - Temporal Authenticator Tx MIC Key (64 bits) 1133 * - Temporal Authenticator Rx MIC Key (64 bits) 1134 * @icv_len: The ICV length for this key type 1135 * @iv_len: The IV length for this key type 1136 */ 1137struct ieee80211_key_conf { 1138 u32 cipher; 1139 u8 icv_len; 1140 u8 iv_len; 1141 u8 hw_key_idx; 1142 u8 flags; 1143 s8 keyidx; 1144 u8 keylen; 1145 u8 key[0]; 1146}; 1147 1148/** 1149 * enum set_key_cmd - key command 1150 * 1151 * Used with the set_key() callback in &struct ieee80211_ops, this 1152 * indicates whether a key is being removed or added. 1153 * 1154 * @SET_KEY: a key is set 1155 * @DISABLE_KEY: a key must be disabled 1156 */ 1157enum set_key_cmd { 1158 SET_KEY, DISABLE_KEY, 1159}; 1160 1161/** 1162 * enum ieee80211_sta_state - station state 1163 * 1164 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1165 * this is a special state for add/remove transitions 1166 * @IEEE80211_STA_NONE: station exists without special state 1167 * @IEEE80211_STA_AUTH: station is authenticated 1168 * @IEEE80211_STA_ASSOC: station is associated 1169 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1170 */ 1171enum ieee80211_sta_state { 1172 /* NOTE: These need to be ordered correctly! */ 1173 IEEE80211_STA_NOTEXIST, 1174 IEEE80211_STA_NONE, 1175 IEEE80211_STA_AUTH, 1176 IEEE80211_STA_ASSOC, 1177 IEEE80211_STA_AUTHORIZED, 1178}; 1179 1180/** 1181 * struct ieee80211_sta - station table entry 1182 * 1183 * A station table entry represents a station we are possibly 1184 * communicating with. Since stations are RCU-managed in 1185 * mac80211, any ieee80211_sta pointer you get access to must 1186 * either be protected by rcu_read_lock() explicitly or implicitly, 1187 * or you must take good care to not use such a pointer after a 1188 * call to your sta_remove callback that removed it. 1189 * 1190 * @addr: MAC address 1191 * @aid: AID we assigned to the station if we're an AP 1192 * @supp_rates: Bitmap of supported rates (per band) 1193 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1194 * @vht_cap: VHT capabilities of this STA; Not restricting any capabilities 1195 * of remote STA. Taking as is. 1196 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1197 * @drv_priv: data area for driver use, will always be aligned to 1198 * sizeof(void *), size is determined in hw information. 1199 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1200 * if wme is supported. 1201 * @max_sp: max Service Period. Only valid if wme is supported. 1202 */ 1203struct ieee80211_sta { 1204 u32 supp_rates[IEEE80211_NUM_BANDS]; 1205 u8 addr[ETH_ALEN]; 1206 u16 aid; 1207 struct ieee80211_sta_ht_cap ht_cap; 1208 struct ieee80211_sta_vht_cap vht_cap; 1209 bool wme; 1210 u8 uapsd_queues; 1211 u8 max_sp; 1212 1213 /* must be last */ 1214 u8 drv_priv[0] __aligned(sizeof(void *)); 1215}; 1216 1217/** 1218 * enum sta_notify_cmd - sta notify command 1219 * 1220 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1221 * indicates if an associated station made a power state transition. 1222 * 1223 * @STA_NOTIFY_SLEEP: a station is now sleeping 1224 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1225 */ 1226enum sta_notify_cmd { 1227 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1228}; 1229 1230/** 1231 * struct ieee80211_tx_control - TX control data 1232 * 1233 * @sta: station table entry, this sta pointer may be NULL and 1234 * it is not allowed to copy the pointer, due to RCU. 1235 */ 1236struct ieee80211_tx_control { 1237 struct ieee80211_sta *sta; 1238}; 1239 1240/** 1241 * enum ieee80211_hw_flags - hardware flags 1242 * 1243 * These flags are used to indicate hardware capabilities to 1244 * the stack. Generally, flags here should have their meaning 1245 * done in a way that the simplest hardware doesn't need setting 1246 * any particular flags. There are some exceptions to this rule, 1247 * however, so you are advised to review these flags carefully. 1248 * 1249 * @IEEE80211_HW_HAS_RATE_CONTROL: 1250 * The hardware or firmware includes rate control, and cannot be 1251 * controlled by the stack. As such, no rate control algorithm 1252 * should be instantiated, and the TX rate reported to userspace 1253 * will be taken from the TX status instead of the rate control 1254 * algorithm. 1255 * Note that this requires that the driver implement a number of 1256 * callbacks so it has the correct information, it needs to have 1257 * the @set_rts_threshold callback and must look at the BSS config 1258 * @use_cts_prot for G/N protection, @use_short_slot for slot 1259 * timing in 2.4 GHz and @use_short_preamble for preambles for 1260 * CCK frames. 1261 * 1262 * @IEEE80211_HW_RX_INCLUDES_FCS: 1263 * Indicates that received frames passed to the stack include 1264 * the FCS at the end. 1265 * 1266 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1267 * Some wireless LAN chipsets buffer broadcast/multicast frames 1268 * for power saving stations in the hardware/firmware and others 1269 * rely on the host system for such buffering. This option is used 1270 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1271 * multicast frames when there are power saving stations so that 1272 * the driver can fetch them with ieee80211_get_buffered_bc(). 1273 * 1274 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1275 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1276 * 1277 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1278 * Hardware is not capable of receiving frames with short preamble on 1279 * the 2.4 GHz band. 1280 * 1281 * @IEEE80211_HW_SIGNAL_UNSPEC: 1282 * Hardware can provide signal values but we don't know its units. We 1283 * expect values between 0 and @max_signal. 1284 * If possible please provide dB or dBm instead. 1285 * 1286 * @IEEE80211_HW_SIGNAL_DBM: 1287 * Hardware gives signal values in dBm, decibel difference from 1288 * one milliwatt. This is the preferred method since it is standardized 1289 * between different devices. @max_signal does not need to be set. 1290 * 1291 * @IEEE80211_HW_SPECTRUM_MGMT: 1292 * Hardware supports spectrum management defined in 802.11h 1293 * Measurement, Channel Switch, Quieting, TPC 1294 * 1295 * @IEEE80211_HW_AMPDU_AGGREGATION: 1296 * Hardware supports 11n A-MPDU aggregation. 1297 * 1298 * @IEEE80211_HW_SUPPORTS_PS: 1299 * Hardware has power save support (i.e. can go to sleep). 1300 * 1301 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1302 * Hardware requires nullfunc frame handling in stack, implies 1303 * stack support for dynamic PS. 1304 * 1305 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1306 * Hardware has support for dynamic PS. 1307 * 1308 * @IEEE80211_HW_MFP_CAPABLE: 1309 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1310 * 1311 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1312 * Hardware supports static spatial multiplexing powersave, 1313 * ie. can turn off all but one chain even on HT connections 1314 * that should be using more chains. 1315 * 1316 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1317 * Hardware supports dynamic spatial multiplexing powersave, 1318 * ie. can turn off all but one chain and then wake the rest 1319 * up as required after, for example, rts/cts handshake. 1320 * 1321 * @IEEE80211_HW_SUPPORTS_UAPSD: 1322 * Hardware supports Unscheduled Automatic Power Save Delivery 1323 * (U-APSD) in managed mode. The mode is configured with 1324 * conf_tx() operation. 1325 * 1326 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1327 * Hardware can provide ack status reports of Tx frames to 1328 * the stack. 1329 * 1330 * @IEEE80211_HW_CONNECTION_MONITOR: 1331 * The hardware performs its own connection monitoring, including 1332 * periodic keep-alives to the AP and probing the AP on beacon loss. 1333 * When this flag is set, signaling beacon-loss will cause an immediate 1334 * change to disassociated state. 1335 * 1336 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1337 * This device needs to get data from beacon before association (i.e. 1338 * dtim_period). 1339 * 1340 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1341 * per-station GTKs as used by IBSS RSN or during fast transition. If 1342 * the device doesn't support per-station GTKs, but can be asked not 1343 * to decrypt group addressed frames, then IBSS RSN support is still 1344 * possible but software crypto will be used. Advertise the wiphy flag 1345 * only in that case. 1346 * 1347 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1348 * autonomously manages the PS status of connected stations. When 1349 * this flag is set mac80211 will not trigger PS mode for connected 1350 * stations based on the PM bit of incoming frames. 1351 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1352 * the PS mode of connected stations. 1353 * 1354 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1355 * setup strictly in HW. mac80211 should not attempt to do this in 1356 * software. 1357 * 1358 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1359 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1360 * the scan). 1361 * 1362 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1363 * a virtual monitor interface when monitor interfaces are the only 1364 * active interfaces. 1365 * 1366 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1367 * queue mapping in order to use different queues (not just one per AC) 1368 * for different virtual interfaces. See the doc section on HW queue 1369 * control for more details. 1370 * 1371 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1372 * P2P Interface. This will be honoured even if more than one interface 1373 * is supported. 1374 */ 1375enum ieee80211_hw_flags { 1376 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1377 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1378 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1379 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1380 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1381 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1382 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1383 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1384 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1385 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1386 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1387 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1388 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1389 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1390 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1391 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1392 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1393 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1394 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1395 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1396 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1397 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1398 IEEE80211_HW_AP_LINK_PS = 1<<22, 1399 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1400 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1401 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1402}; 1403 1404/** 1405 * struct ieee80211_hw - hardware information and state 1406 * 1407 * This structure contains the configuration and hardware 1408 * information for an 802.11 PHY. 1409 * 1410 * @wiphy: This points to the &struct wiphy allocated for this 1411 * 802.11 PHY. You must fill in the @perm_addr and @dev 1412 * members of this structure using SET_IEEE80211_DEV() 1413 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1414 * bands (with channels, bitrates) are registered here. 1415 * 1416 * @conf: &struct ieee80211_conf, device configuration, don't use. 1417 * 1418 * @priv: pointer to private area that was allocated for driver use 1419 * along with this structure. 1420 * 1421 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1422 * 1423 * @extra_tx_headroom: headroom to reserve in each transmit skb 1424 * for use by the driver (e.g. for transmit headers.) 1425 * 1426 * @channel_change_time: time (in microseconds) it takes to change channels. 1427 * 1428 * @max_signal: Maximum value for signal (rssi) in RX information, used 1429 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1430 * 1431 * @max_listen_interval: max listen interval in units of beacon interval 1432 * that HW supports 1433 * 1434 * @queues: number of available hardware transmit queues for 1435 * data packets. WMM/QoS requires at least four, these 1436 * queues need to have configurable access parameters. 1437 * 1438 * @rate_control_algorithm: rate control algorithm for this hardware. 1439 * If unset (NULL), the default algorithm will be used. Must be 1440 * set before calling ieee80211_register_hw(). 1441 * 1442 * @vif_data_size: size (in bytes) of the drv_priv data area 1443 * within &struct ieee80211_vif. 1444 * @sta_data_size: size (in bytes) of the drv_priv data area 1445 * within &struct ieee80211_sta. 1446 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1447 * within &struct ieee80211_chanctx_conf. 1448 * 1449 * @max_rates: maximum number of alternate rate retry stages the hw 1450 * can handle. 1451 * @max_report_rates: maximum number of alternate rate retry stages 1452 * the hw can report back. 1453 * @max_rate_tries: maximum number of tries for each stage 1454 * 1455 * @napi_weight: weight used for NAPI polling. You must specify an 1456 * appropriate value here if a napi_poll operation is provided 1457 * by your driver. 1458 * 1459 * @max_rx_aggregation_subframes: maximum buffer size (number of 1460 * sub-frames) to be used for A-MPDU block ack receiver 1461 * aggregation. 1462 * This is only relevant if the device has restrictions on the 1463 * number of subframes, if it relies on mac80211 to do reordering 1464 * it shouldn't be set. 1465 * 1466 * @max_tx_aggregation_subframes: maximum number of subframes in an 1467 * aggregate an HT driver will transmit, used by the peer as a 1468 * hint to size its reorder buffer. 1469 * 1470 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1471 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1472 * 1473 * @radiotap_mcs_details: lists which MCS information can the HW 1474 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1475 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1476 * adding _BW is supported today. 1477 * 1478 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1479 * the default is _GI | _BANDWIDTH. 1480 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1481 * 1482 * @netdev_features: netdev features to be set in each netdev created 1483 * from this HW. Note only HW checksum features are currently 1484 * compatible with mac80211. Other feature bits will be rejected. 1485 */ 1486struct ieee80211_hw { 1487 struct ieee80211_conf conf; 1488 struct wiphy *wiphy; 1489 const char *rate_control_algorithm; 1490 void *priv; 1491 u32 flags; 1492 unsigned int extra_tx_headroom; 1493 int channel_change_time; 1494 int vif_data_size; 1495 int sta_data_size; 1496 int chanctx_data_size; 1497 int napi_weight; 1498 u16 queues; 1499 u16 max_listen_interval; 1500 s8 max_signal; 1501 u8 max_rates; 1502 u8 max_report_rates; 1503 u8 max_rate_tries; 1504 u8 max_rx_aggregation_subframes; 1505 u8 max_tx_aggregation_subframes; 1506 u8 offchannel_tx_hw_queue; 1507 u8 radiotap_mcs_details; 1508 u16 radiotap_vht_details; 1509 netdev_features_t netdev_features; 1510}; 1511 1512/** 1513 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1514 * 1515 * @wiphy: the &struct wiphy which we want to query 1516 * 1517 * mac80211 drivers can use this to get to their respective 1518 * &struct ieee80211_hw. Drivers wishing to get to their own private 1519 * structure can then access it via hw->priv. Note that mac802111 drivers should 1520 * not use wiphy_priv() to try to get their private driver structure as this 1521 * is already used internally by mac80211. 1522 * 1523 * Return: The mac80211 driver hw struct of @wiphy. 1524 */ 1525struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1526 1527/** 1528 * SET_IEEE80211_DEV - set device for 802.11 hardware 1529 * 1530 * @hw: the &struct ieee80211_hw to set the device for 1531 * @dev: the &struct device of this 802.11 device 1532 */ 1533static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1534{ 1535 set_wiphy_dev(hw->wiphy, dev); 1536} 1537 1538/** 1539 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1540 * 1541 * @hw: the &struct ieee80211_hw to set the MAC address for 1542 * @addr: the address to set 1543 */ 1544static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1545{ 1546 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1547} 1548 1549static inline struct ieee80211_rate * 1550ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1551 const struct ieee80211_tx_info *c) 1552{ 1553 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1554 return NULL; 1555 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1556} 1557 1558static inline struct ieee80211_rate * 1559ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1560 const struct ieee80211_tx_info *c) 1561{ 1562 if (c->control.rts_cts_rate_idx < 0) 1563 return NULL; 1564 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1565} 1566 1567static inline struct ieee80211_rate * 1568ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1569 const struct ieee80211_tx_info *c, int idx) 1570{ 1571 if (c->control.rates[idx + 1].idx < 0) 1572 return NULL; 1573 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1574} 1575 1576/** 1577 * ieee80211_free_txskb - free TX skb 1578 * @hw: the hardware 1579 * @skb: the skb 1580 * 1581 * Free a transmit skb. Use this funtion when some failure 1582 * to transmit happened and thus status cannot be reported. 1583 */ 1584void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1585 1586/** 1587 * DOC: Hardware crypto acceleration 1588 * 1589 * mac80211 is capable of taking advantage of many hardware 1590 * acceleration designs for encryption and decryption operations. 1591 * 1592 * The set_key() callback in the &struct ieee80211_ops for a given 1593 * device is called to enable hardware acceleration of encryption and 1594 * decryption. The callback takes a @sta parameter that will be NULL 1595 * for default keys or keys used for transmission only, or point to 1596 * the station information for the peer for individual keys. 1597 * Multiple transmission keys with the same key index may be used when 1598 * VLANs are configured for an access point. 1599 * 1600 * When transmitting, the TX control data will use the @hw_key_idx 1601 * selected by the driver by modifying the &struct ieee80211_key_conf 1602 * pointed to by the @key parameter to the set_key() function. 1603 * 1604 * The set_key() call for the %SET_KEY command should return 0 if 1605 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1606 * added; if you return 0 then hw_key_idx must be assigned to the 1607 * hardware key index, you are free to use the full u8 range. 1608 * 1609 * When the cmd is %DISABLE_KEY then it must succeed. 1610 * 1611 * Note that it is permissible to not decrypt a frame even if a key 1612 * for it has been uploaded to hardware, the stack will not make any 1613 * decision based on whether a key has been uploaded or not but rather 1614 * based on the receive flags. 1615 * 1616 * The &struct ieee80211_key_conf structure pointed to by the @key 1617 * parameter is guaranteed to be valid until another call to set_key() 1618 * removes it, but it can only be used as a cookie to differentiate 1619 * keys. 1620 * 1621 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1622 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1623 * handler. 1624 * The update_tkip_key() call updates the driver with the new phase 1 key. 1625 * This happens every time the iv16 wraps around (every 65536 packets). The 1626 * set_key() call will happen only once for each key (unless the AP did 1627 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1628 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1629 * handler is software decryption with wrap around of iv16. 1630 * 1631 * The set_default_unicast_key() call updates the default WEP key index 1632 * configured to the hardware for WEP encryption type. This is required 1633 * for devices that support offload of data packets (e.g. ARP responses). 1634 */ 1635 1636/** 1637 * DOC: Powersave support 1638 * 1639 * mac80211 has support for various powersave implementations. 1640 * 1641 * First, it can support hardware that handles all powersaving by itself, 1642 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1643 * flag. In that case, it will be told about the desired powersave mode 1644 * with the %IEEE80211_CONF_PS flag depending on the association status. 1645 * The hardware must take care of sending nullfunc frames when necessary, 1646 * i.e. when entering and leaving powersave mode. The hardware is required 1647 * to look at the AID in beacons and signal to the AP that it woke up when 1648 * it finds traffic directed to it. 1649 * 1650 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1651 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1652 * with hardware wakeup and sleep states. Driver is responsible for waking 1653 * up the hardware before issuing commands to the hardware and putting it 1654 * back to sleep at appropriate times. 1655 * 1656 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1657 * buffered multicast/broadcast frames after the beacon. Also it must be 1658 * possible to send frames and receive the acknowledment frame. 1659 * 1660 * Other hardware designs cannot send nullfunc frames by themselves and also 1661 * need software support for parsing the TIM bitmap. This is also supported 1662 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1663 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1664 * required to pass up beacons. The hardware is still required to handle 1665 * waking up for multicast traffic; if it cannot the driver must handle that 1666 * as best as it can, mac80211 is too slow to do that. 1667 * 1668 * Dynamic powersave is an extension to normal powersave in which the 1669 * hardware stays awake for a user-specified period of time after sending a 1670 * frame so that reply frames need not be buffered and therefore delayed to 1671 * the next wakeup. It's compromise of getting good enough latency when 1672 * there's data traffic and still saving significantly power in idle 1673 * periods. 1674 * 1675 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1676 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1677 * flag and mac80211 will handle everything automatically. Additionally, 1678 * hardware having support for the dynamic PS feature may set the 1679 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1680 * dynamic PS mode itself. The driver needs to look at the 1681 * @dynamic_ps_timeout hardware configuration value and use it that value 1682 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1683 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1684 * enabled whenever user has enabled powersave. 1685 * 1686 * Some hardware need to toggle a single shared antenna between WLAN and 1687 * Bluetooth to facilitate co-existence. These types of hardware set 1688 * limitations on the use of host controlled dynamic powersave whenever there 1689 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1690 * driver may request temporarily going into full power save, in order to 1691 * enable toggling the antenna between BT and WLAN. If the driver requests 1692 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1693 * temporarily set to zero until the driver re-enables dynamic powersave. 1694 * 1695 * Driver informs U-APSD client support by enabling 1696 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1697 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1698 * Nullfunc frames and stay awake until the service period has ended. To 1699 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1700 * from that AC are transmitted with powersave enabled. 1701 * 1702 * Note: U-APSD client mode is not yet supported with 1703 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1704 */ 1705 1706/** 1707 * DOC: Beacon filter support 1708 * 1709 * Some hardware have beacon filter support to reduce host cpu wakeups 1710 * which will reduce system power consumption. It usually works so that 1711 * the firmware creates a checksum of the beacon but omits all constantly 1712 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1713 * beacon is forwarded to the host, otherwise it will be just dropped. That 1714 * way the host will only receive beacons where some relevant information 1715 * (for example ERP protection or WMM settings) have changed. 1716 * 1717 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1718 * interface capability. The driver needs to enable beacon filter support 1719 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1720 * power save is enabled, the stack will not check for beacon loss and the 1721 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1722 * 1723 * The time (or number of beacons missed) until the firmware notifies the 1724 * driver of a beacon loss event (which in turn causes the driver to call 1725 * ieee80211_beacon_loss()) should be configurable and will be controlled 1726 * by mac80211 and the roaming algorithm in the future. 1727 * 1728 * Since there may be constantly changing information elements that nothing 1729 * in the software stack cares about, we will, in the future, have mac80211 1730 * tell the driver which information elements are interesting in the sense 1731 * that we want to see changes in them. This will include 1732 * - a list of information element IDs 1733 * - a list of OUIs for the vendor information element 1734 * 1735 * Ideally, the hardware would filter out any beacons without changes in the 1736 * requested elements, but if it cannot support that it may, at the expense 1737 * of some efficiency, filter out only a subset. For example, if the device 1738 * doesn't support checking for OUIs it should pass up all changes in all 1739 * vendor information elements. 1740 * 1741 * Note that change, for the sake of simplification, also includes information 1742 * elements appearing or disappearing from the beacon. 1743 * 1744 * Some hardware supports an "ignore list" instead, just make sure nothing 1745 * that was requested is on the ignore list, and include commonly changing 1746 * information element IDs in the ignore list, for example 11 (BSS load) and 1747 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1748 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1749 * it could also include some currently unused IDs. 1750 * 1751 * 1752 * In addition to these capabilities, hardware should support notifying the 1753 * host of changes in the beacon RSSI. This is relevant to implement roaming 1754 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1755 * the received data packets). This can consist in notifying the host when 1756 * the RSSI changes significantly or when it drops below or rises above 1757 * configurable thresholds. In the future these thresholds will also be 1758 * configured by mac80211 (which gets them from userspace) to implement 1759 * them as the roaming algorithm requires. 1760 * 1761 * If the hardware cannot implement this, the driver should ask it to 1762 * periodically pass beacon frames to the host so that software can do the 1763 * signal strength threshold checking. 1764 */ 1765 1766/** 1767 * DOC: Spatial multiplexing power save 1768 * 1769 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1770 * power in an 802.11n implementation. For details on the mechanism 1771 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1772 * "11.2.3 SM power save". 1773 * 1774 * The mac80211 implementation is capable of sending action frames 1775 * to update the AP about the station's SMPS mode, and will instruct 1776 * the driver to enter the specific mode. It will also announce the 1777 * requested SMPS mode during the association handshake. Hardware 1778 * support for this feature is required, and can be indicated by 1779 * hardware flags. 1780 * 1781 * The default mode will be "automatic", which nl80211/cfg80211 1782 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1783 * turned off otherwise. 1784 * 1785 * To support this feature, the driver must set the appropriate 1786 * hardware support flags, and handle the SMPS flag to the config() 1787 * operation. It will then with this mechanism be instructed to 1788 * enter the requested SMPS mode while associated to an HT AP. 1789 */ 1790 1791/** 1792 * DOC: Frame filtering 1793 * 1794 * mac80211 requires to see many management frames for proper 1795 * operation, and users may want to see many more frames when 1796 * in monitor mode. However, for best CPU usage and power consumption, 1797 * having as few frames as possible percolate through the stack is 1798 * desirable. Hence, the hardware should filter as much as possible. 1799 * 1800 * To achieve this, mac80211 uses filter flags (see below) to tell 1801 * the driver's configure_filter() function which frames should be 1802 * passed to mac80211 and which should be filtered out. 1803 * 1804 * Before configure_filter() is invoked, the prepare_multicast() 1805 * callback is invoked with the parameters @mc_count and @mc_list 1806 * for the combined multicast address list of all virtual interfaces. 1807 * It's use is optional, and it returns a u64 that is passed to 1808 * configure_filter(). Additionally, configure_filter() has the 1809 * arguments @changed_flags telling which flags were changed and 1810 * @total_flags with the new flag states. 1811 * 1812 * If your device has no multicast address filters your driver will 1813 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1814 * parameter to see whether multicast frames should be accepted 1815 * or dropped. 1816 * 1817 * All unsupported flags in @total_flags must be cleared. 1818 * Hardware does not support a flag if it is incapable of _passing_ 1819 * the frame to the stack. Otherwise the driver must ignore 1820 * the flag, but not clear it. 1821 * You must _only_ clear the flag (announce no support for the 1822 * flag to mac80211) if you are not able to pass the packet type 1823 * to the stack (so the hardware always filters it). 1824 * So for example, you should clear @FIF_CONTROL, if your hardware 1825 * always filters control frames. If your hardware always passes 1826 * control frames to the kernel and is incapable of filtering them, 1827 * you do _not_ clear the @FIF_CONTROL flag. 1828 * This rule applies to all other FIF flags as well. 1829 */ 1830 1831/** 1832 * DOC: AP support for powersaving clients 1833 * 1834 * In order to implement AP and P2P GO modes, mac80211 has support for 1835 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1836 * There currently is no support for sAPSD. 1837 * 1838 * There is one assumption that mac80211 makes, namely that a client 1839 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1840 * Both are supported, and both can be used by the same client, but 1841 * they can't be used concurrently by the same client. This simplifies 1842 * the driver code. 1843 * 1844 * The first thing to keep in mind is that there is a flag for complete 1845 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1846 * mac80211 expects the driver to handle most of the state machine for 1847 * powersaving clients and will ignore the PM bit in incoming frames. 1848 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1849 * stations' powersave transitions. In this mode, mac80211 also doesn't 1850 * handle PS-Poll/uAPSD. 1851 * 1852 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1853 * PM bit in incoming frames for client powersave transitions. When a 1854 * station goes to sleep, we will stop transmitting to it. There is, 1855 * however, a race condition: a station might go to sleep while there is 1856 * data buffered on hardware queues. If the device has support for this 1857 * it will reject frames, and the driver should give the frames back to 1858 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1859 * cause mac80211 to retry the frame when the station wakes up. The 1860 * driver is also notified of powersave transitions by calling its 1861 * @sta_notify callback. 1862 * 1863 * When the station is asleep, it has three choices: it can wake up, 1864 * it can PS-Poll, or it can possibly start a uAPSD service period. 1865 * Waking up is implemented by simply transmitting all buffered (and 1866 * filtered) frames to the station. This is the easiest case. When 1867 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1868 * will inform the driver of this with the @allow_buffered_frames 1869 * callback; this callback is optional. mac80211 will then transmit 1870 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1871 * on each frame. The last frame in the service period (or the only 1872 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1873 * indicate that it ends the service period; as this frame must have 1874 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1875 * When TX status is reported for this frame, the service period is 1876 * marked has having ended and a new one can be started by the peer. 1877 * 1878 * Additionally, non-bufferable MMPDUs can also be transmitted by 1879 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1880 * 1881 * Another race condition can happen on some devices like iwlwifi 1882 * when there are frames queued for the station and it wakes up 1883 * or polls; the frames that are already queued could end up being 1884 * transmitted first instead, causing reordering and/or wrong 1885 * processing of the EOSP. The cause is that allowing frames to be 1886 * transmitted to a certain station is out-of-band communication to 1887 * the device. To allow this problem to be solved, the driver can 1888 * call ieee80211_sta_block_awake() if frames are buffered when it 1889 * is notified that the station went to sleep. When all these frames 1890 * have been filtered (see above), it must call the function again 1891 * to indicate that the station is no longer blocked. 1892 * 1893 * If the driver buffers frames in the driver for aggregation in any 1894 * way, it must use the ieee80211_sta_set_buffered() call when it is 1895 * notified of the station going to sleep to inform mac80211 of any 1896 * TIDs that have frames buffered. Note that when a station wakes up 1897 * this information is reset (hence the requirement to call it when 1898 * informed of the station going to sleep). Then, when a service 1899 * period starts for any reason, @release_buffered_frames is called 1900 * with the number of frames to be released and which TIDs they are 1901 * to come from. In this case, the driver is responsible for setting 1902 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1903 * to help the @more_data paramter is passed to tell the driver if 1904 * there is more data on other TIDs -- the TIDs to release frames 1905 * from are ignored since mac80211 doesn't know how many frames the 1906 * buffers for those TIDs contain. 1907 * 1908 * If the driver also implement GO mode, where absence periods may 1909 * shorten service periods (or abort PS-Poll responses), it must 1910 * filter those response frames except in the case of frames that 1911 * are buffered in the driver -- those must remain buffered to avoid 1912 * reordering. Because it is possible that no frames are released 1913 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1914 * to indicate to mac80211 that the service period ended anyway. 1915 * 1916 * Finally, if frames from multiple TIDs are released from mac80211 1917 * but the driver might reorder them, it must clear & set the flags 1918 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1919 * and also take care of the EOSP and MORE_DATA bits in the frame. 1920 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1921 */ 1922 1923/** 1924 * DOC: HW queue control 1925 * 1926 * Before HW queue control was introduced, mac80211 only had a single static 1927 * assignment of per-interface AC software queues to hardware queues. This 1928 * was problematic for a few reasons: 1929 * 1) off-channel transmissions might get stuck behind other frames 1930 * 2) multiple virtual interfaces couldn't be handled correctly 1931 * 3) after-DTIM frames could get stuck behind other frames 1932 * 1933 * To solve this, hardware typically uses multiple different queues for all 1934 * the different usages, and this needs to be propagated into mac80211 so it 1935 * won't have the same problem with the software queues. 1936 * 1937 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 1938 * flag that tells it that the driver implements its own queue control. To do 1939 * so, the driver will set up the various queues in each &struct ieee80211_vif 1940 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 1941 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 1942 * if necessary will queue the frame on the right software queue that mirrors 1943 * the hardware queue. 1944 * Additionally, the driver has to then use these HW queue IDs for the queue 1945 * management functions (ieee80211_stop_queue() et al.) 1946 * 1947 * The driver is free to set up the queue mappings as needed, multiple virtual 1948 * interfaces may map to the same hardware queues if needed. The setup has to 1949 * happen during add_interface or change_interface callbacks. For example, a 1950 * driver supporting station+station and station+AP modes might decide to have 1951 * 10 hardware queues to handle different scenarios: 1952 * 1953 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 1954 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 1955 * after-DTIM queue for AP: 8 1956 * off-channel queue: 9 1957 * 1958 * It would then set up the hardware like this: 1959 * hw.offchannel_tx_hw_queue = 9 1960 * 1961 * and the first virtual interface that is added as follows: 1962 * vif.hw_queue[IEEE80211_AC_VO] = 0 1963 * vif.hw_queue[IEEE80211_AC_VI] = 1 1964 * vif.hw_queue[IEEE80211_AC_BE] = 2 1965 * vif.hw_queue[IEEE80211_AC_BK] = 3 1966 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 1967 * and the second virtual interface with 4-7. 1968 * 1969 * If queue 6 gets full, for example, mac80211 would only stop the second 1970 * virtual interface's BE queue since virtual interface queues are per AC. 1971 * 1972 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 1973 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 1974 * queue could potentially be shared since mac80211 will look at cab_queue when 1975 * a queue is stopped/woken even if the interface is not in AP mode. 1976 */ 1977 1978/** 1979 * enum ieee80211_filter_flags - hardware filter flags 1980 * 1981 * These flags determine what the filter in hardware should be 1982 * programmed to let through and what should not be passed to the 1983 * stack. It is always safe to pass more frames than requested, 1984 * but this has negative impact on power consumption. 1985 * 1986 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1987 * think of the BSS as your network segment and then this corresponds 1988 * to the regular ethernet device promiscuous mode. 1989 * 1990 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1991 * by the user or if the hardware is not capable of filtering by 1992 * multicast address. 1993 * 1994 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1995 * %RX_FLAG_FAILED_FCS_CRC for them) 1996 * 1997 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1998 * the %RX_FLAG_FAILED_PLCP_CRC for them 1999 * 2000 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2001 * to the hardware that it should not filter beacons or probe responses 2002 * by BSSID. Filtering them can greatly reduce the amount of processing 2003 * mac80211 needs to do and the amount of CPU wakeups, so you should 2004 * honour this flag if possible. 2005 * 2006 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2007 * is not set then only those addressed to this station. 2008 * 2009 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2010 * 2011 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2012 * those addressed to this station. 2013 * 2014 * @FIF_PROBE_REQ: pass probe request frames 2015 */ 2016enum ieee80211_filter_flags { 2017 FIF_PROMISC_IN_BSS = 1<<0, 2018 FIF_ALLMULTI = 1<<1, 2019 FIF_FCSFAIL = 1<<2, 2020 FIF_PLCPFAIL = 1<<3, 2021 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2022 FIF_CONTROL = 1<<5, 2023 FIF_OTHER_BSS = 1<<6, 2024 FIF_PSPOLL = 1<<7, 2025 FIF_PROBE_REQ = 1<<8, 2026}; 2027 2028/** 2029 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2030 * 2031 * These flags are used with the ampdu_action() callback in 2032 * &struct ieee80211_ops to indicate which action is needed. 2033 * 2034 * Note that drivers MUST be able to deal with a TX aggregation 2035 * session being stopped even before they OK'ed starting it by 2036 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2037 * might receive the addBA frame and send a delBA right away! 2038 * 2039 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2040 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2041 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2042 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2043 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2044 * queued packets, now unaggregated. After all packets are transmitted the 2045 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2046 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2047 * called when the station is removed. There's no need or reason to call 2048 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2049 * session is gone and removes the station. 2050 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2051 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2052 * now the connection is dropped and the station will be removed. Drivers 2053 * should clean up and drop remaining packets when this is called. 2054 */ 2055enum ieee80211_ampdu_mlme_action { 2056 IEEE80211_AMPDU_RX_START, 2057 IEEE80211_AMPDU_RX_STOP, 2058 IEEE80211_AMPDU_TX_START, 2059 IEEE80211_AMPDU_TX_STOP_CONT, 2060 IEEE80211_AMPDU_TX_STOP_FLUSH, 2061 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2062 IEEE80211_AMPDU_TX_OPERATIONAL, 2063}; 2064 2065/** 2066 * enum ieee80211_frame_release_type - frame release reason 2067 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2068 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2069 * frame received on trigger-enabled AC 2070 */ 2071enum ieee80211_frame_release_type { 2072 IEEE80211_FRAME_RELEASE_PSPOLL, 2073 IEEE80211_FRAME_RELEASE_UAPSD, 2074}; 2075 2076/** 2077 * enum ieee80211_rate_control_changed - flags to indicate what changed 2078 * 2079 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2080 * to this station changed. 2081 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2082 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2083 * changed (in IBSS mode) due to discovering more information about 2084 * the peer. 2085 */ 2086enum ieee80211_rate_control_changed { 2087 IEEE80211_RC_BW_CHANGED = BIT(0), 2088 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2089 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2090}; 2091 2092/** 2093 * struct ieee80211_ops - callbacks from mac80211 to the driver 2094 * 2095 * This structure contains various callbacks that the driver may 2096 * handle or, in some cases, must handle, for example to configure 2097 * the hardware to a new channel or to transmit a frame. 2098 * 2099 * @tx: Handler that 802.11 module calls for each transmitted frame. 2100 * skb contains the buffer starting from the IEEE 802.11 header. 2101 * The low-level driver should send the frame out based on 2102 * configuration in the TX control data. This handler should, 2103 * preferably, never fail and stop queues appropriately. 2104 * Must be atomic. 2105 * 2106 * @start: Called before the first netdevice attached to the hardware 2107 * is enabled. This should turn on the hardware and must turn on 2108 * frame reception (for possibly enabled monitor interfaces.) 2109 * Returns negative error codes, these may be seen in userspace, 2110 * or zero. 2111 * When the device is started it should not have a MAC address 2112 * to avoid acknowledging frames before a non-monitor device 2113 * is added. 2114 * Must be implemented and can sleep. 2115 * 2116 * @stop: Called after last netdevice attached to the hardware 2117 * is disabled. This should turn off the hardware (at least 2118 * it must turn off frame reception.) 2119 * May be called right after add_interface if that rejects 2120 * an interface. If you added any work onto the mac80211 workqueue 2121 * you should ensure to cancel it on this callback. 2122 * Must be implemented and can sleep. 2123 * 2124 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2125 * stop transmitting and doing any other configuration, and then 2126 * ask the device to suspend. This is only invoked when WoWLAN is 2127 * configured, otherwise the device is deconfigured completely and 2128 * reconfigured at resume time. 2129 * The driver may also impose special conditions under which it 2130 * wants to use the "normal" suspend (deconfigure), say if it only 2131 * supports WoWLAN when the device is associated. In this case, it 2132 * must return 1 from this function. 2133 * 2134 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2135 * now resuming its operation, after this the device must be fully 2136 * functional again. If this returns an error, the only way out is 2137 * to also unregister the device. If it returns 1, then mac80211 2138 * will also go through the regular complete restart on resume. 2139 * 2140 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2141 * modified. The reason is that device_set_wakeup_enable() is 2142 * supposed to be called when the configuration changes, not only 2143 * in suspend(). 2144 * 2145 * @add_interface: Called when a netdevice attached to the hardware is 2146 * enabled. Because it is not called for monitor mode devices, @start 2147 * and @stop must be implemented. 2148 * The driver should perform any initialization it needs before 2149 * the device can be enabled. The initial configuration for the 2150 * interface is given in the conf parameter. 2151 * The callback may refuse to add an interface by returning a 2152 * negative error code (which will be seen in userspace.) 2153 * Must be implemented and can sleep. 2154 * 2155 * @change_interface: Called when a netdevice changes type. This callback 2156 * is optional, but only if it is supported can interface types be 2157 * switched while the interface is UP. The callback may sleep. 2158 * Note that while an interface is being switched, it will not be 2159 * found by the interface iteration callbacks. 2160 * 2161 * @remove_interface: Notifies a driver that an interface is going down. 2162 * The @stop callback is called after this if it is the last interface 2163 * and no monitor interfaces are present. 2164 * When all interfaces are removed, the MAC address in the hardware 2165 * must be cleared so the device no longer acknowledges packets, 2166 * the mac_addr member of the conf structure is, however, set to the 2167 * MAC address of the device going away. 2168 * Hence, this callback must be implemented. It can sleep. 2169 * 2170 * @add_interface_debugfs: Drivers can use this callback to add debugfs files 2171 * when a vif is added to mac80211. This callback and 2172 * @remove_interface_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2173 * conditional. @remove_interface_debugfs must be provided for cleanup. 2174 * This callback can sleep. 2175 * 2176 * @remove_interface_debugfs: Remove the debugfs files which were added using 2177 * @add_interface_debugfs. This callback must remove all debugfs entries 2178 * that were added because mac80211 only removes interface debugfs when the 2179 * interface is destroyed, not when it is removed from the driver. 2180 * This callback can sleep. 2181 * 2182 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2183 * function to change hardware configuration, e.g., channel. 2184 * This function should never fail but returns a negative error code 2185 * if it does. The callback can sleep. 2186 * 2187 * @bss_info_changed: Handler for configuration requests related to BSS 2188 * parameters that may vary during BSS's lifespan, and may affect low 2189 * level driver (e.g. assoc/disassoc status, erp parameters). 2190 * This function should not be used if no BSS has been set, unless 2191 * for association indication. The @changed parameter indicates which 2192 * of the bss parameters has changed when a call is made. The callback 2193 * can sleep. 2194 * 2195 * @prepare_multicast: Prepare for multicast filter configuration. 2196 * This callback is optional, and its return value is passed 2197 * to configure_filter(). This callback must be atomic. 2198 * 2199 * @configure_filter: Configure the device's RX filter. 2200 * See the section "Frame filtering" for more information. 2201 * This callback must be implemented and can sleep. 2202 * 2203 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2204 * must be set or cleared for a given STA. Must be atomic. 2205 * 2206 * @set_key: See the section "Hardware crypto acceleration" 2207 * This callback is only called between add_interface and 2208 * remove_interface calls, i.e. while the given virtual interface 2209 * is enabled. 2210 * Returns a negative error code if the key can't be added. 2211 * The callback can sleep. 2212 * 2213 * @update_tkip_key: See the section "Hardware crypto acceleration" 2214 * This callback will be called in the context of Rx. Called for drivers 2215 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2216 * The callback must be atomic. 2217 * 2218 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2219 * host is suspended, it can assign this callback to retrieve the data 2220 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2221 * After rekeying was done it should (for example during resume) notify 2222 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2223 * 2224 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2225 * WEP when the device sends data packets autonomously, e.g. for ARP 2226 * offloading. The index can be 0-3, or -1 for unsetting it. 2227 * 2228 * @hw_scan: Ask the hardware to service the scan request, no need to start 2229 * the scan state machine in stack. The scan must honour the channel 2230 * configuration done by the regulatory agent in the wiphy's 2231 * registered bands. The hardware (or the driver) needs to make sure 2232 * that power save is disabled. 2233 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2234 * entire IEs after the SSID, so that drivers need not look at these 2235 * at all but just send them after the SSID -- mac80211 includes the 2236 * (extended) supported rates and HT information (where applicable). 2237 * When the scan finishes, ieee80211_scan_completed() must be called; 2238 * note that it also must be called when the scan cannot finish due to 2239 * any error unless this callback returned a negative error code. 2240 * The callback can sleep. 2241 * 2242 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2243 * The driver should ask the hardware to cancel the scan (if possible), 2244 * but the scan will be completed only after the driver will call 2245 * ieee80211_scan_completed(). 2246 * This callback is needed for wowlan, to prevent enqueueing a new 2247 * scan_work after the low-level driver was already suspended. 2248 * The callback can sleep. 2249 * 2250 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2251 * specific intervals. The driver must call the 2252 * ieee80211_sched_scan_results() function whenever it finds results. 2253 * This process will continue until sched_scan_stop is called. 2254 * 2255 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2256 * 2257 * @sw_scan_start: Notifier function that is called just before a software scan 2258 * is started. Can be NULL, if the driver doesn't need this notification. 2259 * The callback can sleep. 2260 * 2261 * @sw_scan_complete: Notifier function that is called just after a 2262 * software scan finished. Can be NULL, if the driver doesn't need 2263 * this notification. 2264 * The callback can sleep. 2265 * 2266 * @get_stats: Return low-level statistics. 2267 * Returns zero if statistics are available. 2268 * The callback can sleep. 2269 * 2270 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2271 * callback should be provided to read the TKIP transmit IVs (both IV32 2272 * and IV16) for the given key from hardware. 2273 * The callback must be atomic. 2274 * 2275 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2276 * if the device does fragmentation by itself; if this callback is 2277 * implemented then the stack will not do fragmentation. 2278 * The callback can sleep. 2279 * 2280 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2281 * The callback can sleep. 2282 * 2283 * @sta_add: Notifies low level driver about addition of an associated station, 2284 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2285 * 2286 * @sta_remove: Notifies low level driver about removal of an associated 2287 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2288 * 2289 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2290 * when a station is added to mac80211's station list. This callback 2291 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2292 * conditional. This callback can sleep. 2293 * 2294 * @sta_remove_debugfs: Remove the debugfs files which were added using 2295 * @sta_add_debugfs. This callback can sleep. 2296 * 2297 * @sta_notify: Notifies low level driver about power state transition of an 2298 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2299 * in AP mode, this callback will not be called when the flag 2300 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2301 * 2302 * @sta_state: Notifies low level driver about state transition of a 2303 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2304 * This callback is mutually exclusive with @sta_add/@sta_remove. 2305 * It must not fail for down transitions but may fail for transitions 2306 * up the list of states. 2307 * The callback can sleep. 2308 * 2309 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2310 * used to transmit to the station. The changes are advertised with bits 2311 * from &enum ieee80211_rate_control_changed and the values are reflected 2312 * in the station data. This callback should only be used when the driver 2313 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2314 * otherwise the rate control algorithm is notified directly. 2315 * Must be atomic. 2316 * 2317 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2318 * bursting) for a hardware TX queue. 2319 * Returns a negative error code on failure. 2320 * The callback can sleep. 2321 * 2322 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2323 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2324 * required function. 2325 * The callback can sleep. 2326 * 2327 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2328 * Currently, this is only used for IBSS mode debugging. Is not a 2329 * required function. 2330 * The callback can sleep. 2331 * 2332 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2333 * with other STAs in the IBSS. This is only used in IBSS mode. This 2334 * function is optional if the firmware/hardware takes full care of 2335 * TSF synchronization. 2336 * The callback can sleep. 2337 * 2338 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2339 * This is needed only for IBSS mode and the result of this function is 2340 * used to determine whether to reply to Probe Requests. 2341 * Returns non-zero if this device sent the last beacon. 2342 * The callback can sleep. 2343 * 2344 * @ampdu_action: Perform a certain A-MPDU action 2345 * The RA/TID combination determines the destination and TID we want 2346 * the ampdu action to be performed for. The action is defined through 2347 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2348 * is the first frame we expect to perform the action on. Notice 2349 * that TX/RX_STOP can pass NULL for this parameter. 2350 * The @buf_size parameter is only valid when the action is set to 2351 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2352 * buffer size (number of subframes) for this session -- the driver 2353 * may neither send aggregates containing more subframes than this 2354 * nor send aggregates in a way that lost frames would exceed the 2355 * buffer size. If just limiting the aggregate size, this would be 2356 * possible with a buf_size of 8: 2357 * - TX: 1.....7 2358 * - RX: 2....7 (lost frame #1) 2359 * - TX: 8..1... 2360 * which is invalid since #1 was now re-transmitted well past the 2361 * buffer size of 8. Correct ways to retransmit #1 would be: 2362 * - TX: 1 or 18 or 81 2363 * Even "189" would be wrong since 1 could be lost again. 2364 * 2365 * Returns a negative error code on failure. 2366 * The callback can sleep. 2367 * 2368 * @get_survey: Return per-channel survey information 2369 * 2370 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2371 * need to set wiphy->rfkill_poll to %true before registration, 2372 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2373 * The callback can sleep. 2374 * 2375 * @set_coverage_class: Set slot time for given coverage class as specified 2376 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2377 * accordingly. This callback is not required and may sleep. 2378 * 2379 * @testmode_cmd: Implement a cfg80211 test mode command. 2380 * The callback can sleep. 2381 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2382 * 2383 * @flush: Flush all pending frames from the hardware queue, making sure 2384 * that the hardware queues are empty. If the parameter @drop is set 2385 * to %true, pending frames may be dropped. The callback can sleep. 2386 * 2387 * @channel_switch: Drivers that need (or want) to offload the channel 2388 * switch operation for CSAs received from the AP may implement this 2389 * callback. They must then call ieee80211_chswitch_done() to indicate 2390 * completion of the channel switch. 2391 * 2392 * @napi_poll: Poll Rx queue for incoming data frames. 2393 * 2394 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2395 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2396 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2397 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2398 * 2399 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2400 * 2401 * @remain_on_channel: Starts an off-channel period on the given channel, must 2402 * call back to ieee80211_ready_on_channel() when on that channel. Note 2403 * that normal channel traffic is not stopped as this is intended for hw 2404 * offload. Frames to transmit on the off-channel channel are transmitted 2405 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2406 * duration (which will always be non-zero) expires, the driver must call 2407 * ieee80211_remain_on_channel_expired(). 2408 * Note that this callback may be called while the device is in IDLE and 2409 * must be accepted in this case. 2410 * This callback may sleep. 2411 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2412 * aborted before it expires. This callback may sleep. 2413 * 2414 * @set_ringparam: Set tx and rx ring sizes. 2415 * 2416 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2417 * 2418 * @tx_frames_pending: Check if there is any pending frame in the hardware 2419 * queues before entering power save. 2420 * 2421 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2422 * when transmitting a frame. Currently only legacy rates are handled. 2423 * The callback can sleep. 2424 * @rssi_callback: Notify driver when the average RSSI goes above/below 2425 * thresholds that were registered previously. The callback can sleep. 2426 * 2427 * @release_buffered_frames: Release buffered frames according to the given 2428 * parameters. In the case where the driver buffers some frames for 2429 * sleeping stations mac80211 will use this callback to tell the driver 2430 * to release some frames, either for PS-poll or uAPSD. 2431 * Note that if the @more_data paramter is %false the driver must check 2432 * if there are more frames on the given TIDs, and if there are more than 2433 * the frames being released then it must still set the more-data bit in 2434 * the frame. If the @more_data parameter is %true, then of course the 2435 * more-data bit must always be set. 2436 * The @tids parameter tells the driver which TIDs to release frames 2437 * from, for PS-poll it will always have only a single bit set. 2438 * In the case this is used for a PS-poll initiated release, the 2439 * @num_frames parameter will always be 1 so code can be shared. In 2440 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2441 * on the TX status (and must report TX status) so that the PS-poll 2442 * period is properly ended. This is used to avoid sending multiple 2443 * responses for a retried PS-poll frame. 2444 * In the case this is used for uAPSD, the @num_frames parameter may be 2445 * bigger than one, but the driver may send fewer frames (it must send 2446 * at least one, however). In this case it is also responsible for 2447 * setting the EOSP flag in the QoS header of the frames. Also, when the 2448 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2449 * on the last frame in the SP. Alternatively, it may call the function 2450 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2451 * This callback must be atomic. 2452 * @allow_buffered_frames: Prepare device to allow the given number of frames 2453 * to go out to the given station. The frames will be sent by mac80211 2454 * via the usual TX path after this call. The TX information for frames 2455 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2456 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2457 * frames from multiple TIDs are released and the driver might reorder 2458 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2459 * on the last frame and clear it on all others and also handle the EOSP 2460 * bit in the QoS header correctly. Alternatively, it can also call the 2461 * ieee80211_sta_eosp_irqsafe() function. 2462 * The @tids parameter is a bitmap and tells the driver which TIDs the 2463 * frames will be on; it will at most have two bits set. 2464 * This callback must be atomic. 2465 * 2466 * @get_et_sset_count: Ethtool API to get string-set count. 2467 * 2468 * @get_et_stats: Ethtool API to get a set of u64 stats. 2469 * 2470 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2471 * and perhaps other supported types of ethtool data-sets. 2472 * 2473 * @get_rssi: Get current signal strength in dBm, the function is optional 2474 * and can sleep. 2475 * 2476 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2477 * before associated. In multi-channel scenarios, a virtual interface is 2478 * bound to a channel before it is associated, but as it isn't associated 2479 * yet it need not necessarily be given airtime, in particular since any 2480 * transmission to a P2P GO needs to be synchronized against the GO's 2481 * powersave state. mac80211 will call this function before transmitting a 2482 * management frame prior to having successfully associated to allow the 2483 * driver to give it channel time for the transmission, to get a response 2484 * and to be able to synchronize with the GO. 2485 * The callback will be called before each transmission and upon return 2486 * mac80211 will transmit the frame right away. 2487 * The callback is optional and can (should!) sleep. 2488 * 2489 * @add_chanctx: Notifies device driver about new channel context creation. 2490 * @remove_chanctx: Notifies device driver about channel context destruction. 2491 * @change_chanctx: Notifies device driver about channel context changes that 2492 * may happen when combining different virtual interfaces on the same 2493 * channel context with different settings 2494 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2495 * to vif. Possible use is for hw queue remapping. 2496 * @unassign_vif_chanctx: Notifies device driver about channel context being 2497 * unbound from vif. 2498 * @start_ap: Start operation on the AP interface, this is called after all the 2499 * information in bss_conf is set and beacon can be retrieved. A channel 2500 * context is bound before this is called. Note that if the driver uses 2501 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2502 * just "paused" for scanning/ROC, which is indicated by the beacon being 2503 * disabled/enabled via @bss_info_changed. 2504 * @stop_ap: Stop operation on the AP interface. 2505 * 2506 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2507 * reconfiguration has completed. This can help the driver implement the 2508 * reconfiguration step. Also called when reconfiguring because the 2509 * driver's resume function returned 1, as this is just like an "inline" 2510 * hardware restart. This callback may sleep. 2511 * 2512 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2513 * Currently, this is only called for managed or P2P client interfaces. 2514 * This callback is optional; it must not sleep. 2515 */ 2516struct ieee80211_ops { 2517 void (*tx)(struct ieee80211_hw *hw, 2518 struct ieee80211_tx_control *control, 2519 struct sk_buff *skb); 2520 int (*start)(struct ieee80211_hw *hw); 2521 void (*stop)(struct ieee80211_hw *hw); 2522#ifdef CONFIG_PM 2523 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2524 int (*resume)(struct ieee80211_hw *hw); 2525 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2526#endif 2527 int (*add_interface)(struct ieee80211_hw *hw, 2528 struct ieee80211_vif *vif); 2529 int (*change_interface)(struct ieee80211_hw *hw, 2530 struct ieee80211_vif *vif, 2531 enum nl80211_iftype new_type, bool p2p); 2532 void (*remove_interface)(struct ieee80211_hw *hw, 2533 struct ieee80211_vif *vif); 2534 int (*config)(struct ieee80211_hw *hw, u32 changed); 2535 void (*bss_info_changed)(struct ieee80211_hw *hw, 2536 struct ieee80211_vif *vif, 2537 struct ieee80211_bss_conf *info, 2538 u32 changed); 2539 2540 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2541 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2542 2543 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2544 struct netdev_hw_addr_list *mc_list); 2545 void (*configure_filter)(struct ieee80211_hw *hw, 2546 unsigned int changed_flags, 2547 unsigned int *total_flags, 2548 u64 multicast); 2549 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2550 bool set); 2551 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2552 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2553 struct ieee80211_key_conf *key); 2554 void (*update_tkip_key)(struct ieee80211_hw *hw, 2555 struct ieee80211_vif *vif, 2556 struct ieee80211_key_conf *conf, 2557 struct ieee80211_sta *sta, 2558 u32 iv32, u16 *phase1key); 2559 void (*set_rekey_data)(struct ieee80211_hw *hw, 2560 struct ieee80211_vif *vif, 2561 struct cfg80211_gtk_rekey_data *data); 2562 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2563 struct ieee80211_vif *vif, int idx); 2564 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2565 struct cfg80211_scan_request *req); 2566 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2567 struct ieee80211_vif *vif); 2568 int (*sched_scan_start)(struct ieee80211_hw *hw, 2569 struct ieee80211_vif *vif, 2570 struct cfg80211_sched_scan_request *req, 2571 struct ieee80211_sched_scan_ies *ies); 2572 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2573 struct ieee80211_vif *vif); 2574 void (*sw_scan_start)(struct ieee80211_hw *hw); 2575 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2576 int (*get_stats)(struct ieee80211_hw *hw, 2577 struct ieee80211_low_level_stats *stats); 2578 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2579 u32 *iv32, u16 *iv16); 2580 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2581 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2582 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2583 struct ieee80211_sta *sta); 2584 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2585 struct ieee80211_sta *sta); 2586#ifdef CONFIG_MAC80211_DEBUGFS 2587 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2588 struct ieee80211_vif *vif, 2589 struct ieee80211_sta *sta, 2590 struct dentry *dir); 2591 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2592 struct ieee80211_vif *vif, 2593 struct ieee80211_sta *sta, 2594 struct dentry *dir); 2595 void (*add_interface_debugfs)(struct ieee80211_hw *hw, 2596 struct ieee80211_vif *vif, 2597 struct dentry *dir); 2598 void (*remove_interface_debugfs)(struct ieee80211_hw *hw, 2599 struct ieee80211_vif *vif, 2600 struct dentry *dir); 2601#endif 2602 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2603 enum sta_notify_cmd, struct ieee80211_sta *sta); 2604 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2605 struct ieee80211_sta *sta, 2606 enum ieee80211_sta_state old_state, 2607 enum ieee80211_sta_state new_state); 2608 void (*sta_rc_update)(struct ieee80211_hw *hw, 2609 struct ieee80211_vif *vif, 2610 struct ieee80211_sta *sta, 2611 u32 changed); 2612 int (*conf_tx)(struct ieee80211_hw *hw, 2613 struct ieee80211_vif *vif, u16 ac, 2614 const struct ieee80211_tx_queue_params *params); 2615 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2616 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2617 u64 tsf); 2618 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2619 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2620 int (*ampdu_action)(struct ieee80211_hw *hw, 2621 struct ieee80211_vif *vif, 2622 enum ieee80211_ampdu_mlme_action action, 2623 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2624 u8 buf_size); 2625 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2626 struct survey_info *survey); 2627 void (*rfkill_poll)(struct ieee80211_hw *hw); 2628 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2629#ifdef CONFIG_NL80211_TESTMODE 2630 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2631 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2632 struct netlink_callback *cb, 2633 void *data, int len); 2634#endif 2635 void (*flush)(struct ieee80211_hw *hw, bool drop); 2636 void (*channel_switch)(struct ieee80211_hw *hw, 2637 struct ieee80211_channel_switch *ch_switch); 2638 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2639 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2640 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2641 2642 int (*remain_on_channel)(struct ieee80211_hw *hw, 2643 struct ieee80211_vif *vif, 2644 struct ieee80211_channel *chan, 2645 int duration); 2646 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2647 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2648 void (*get_ringparam)(struct ieee80211_hw *hw, 2649 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2650 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2651 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2652 const struct cfg80211_bitrate_mask *mask); 2653 void (*rssi_callback)(struct ieee80211_hw *hw, 2654 struct ieee80211_vif *vif, 2655 enum ieee80211_rssi_event rssi_event); 2656 2657 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2658 struct ieee80211_sta *sta, 2659 u16 tids, int num_frames, 2660 enum ieee80211_frame_release_type reason, 2661 bool more_data); 2662 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2663 struct ieee80211_sta *sta, 2664 u16 tids, int num_frames, 2665 enum ieee80211_frame_release_type reason, 2666 bool more_data); 2667 2668 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2669 struct ieee80211_vif *vif, int sset); 2670 void (*get_et_stats)(struct ieee80211_hw *hw, 2671 struct ieee80211_vif *vif, 2672 struct ethtool_stats *stats, u64 *data); 2673 void (*get_et_strings)(struct ieee80211_hw *hw, 2674 struct ieee80211_vif *vif, 2675 u32 sset, u8 *data); 2676 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2677 struct ieee80211_sta *sta, s8 *rssi_dbm); 2678 2679 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2680 struct ieee80211_vif *vif); 2681 2682 int (*add_chanctx)(struct ieee80211_hw *hw, 2683 struct ieee80211_chanctx_conf *ctx); 2684 void (*remove_chanctx)(struct ieee80211_hw *hw, 2685 struct ieee80211_chanctx_conf *ctx); 2686 void (*change_chanctx)(struct ieee80211_hw *hw, 2687 struct ieee80211_chanctx_conf *ctx, 2688 u32 changed); 2689 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2690 struct ieee80211_vif *vif, 2691 struct ieee80211_chanctx_conf *ctx); 2692 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2693 struct ieee80211_vif *vif, 2694 struct ieee80211_chanctx_conf *ctx); 2695 2696 void (*restart_complete)(struct ieee80211_hw *hw); 2697 2698#if IS_ENABLED(CONFIG_IPV6) 2699 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2700 struct ieee80211_vif *vif, 2701 struct inet6_dev *idev); 2702#endif 2703}; 2704 2705/** 2706 * ieee80211_alloc_hw - Allocate a new hardware device 2707 * 2708 * This must be called once for each hardware device. The returned pointer 2709 * must be used to refer to this device when calling other functions. 2710 * mac80211 allocates a private data area for the driver pointed to by 2711 * @priv in &struct ieee80211_hw, the size of this area is given as 2712 * @priv_data_len. 2713 * 2714 * @priv_data_len: length of private data 2715 * @ops: callbacks for this device 2716 * 2717 * Return: A pointer to the new hardware device, or %NULL on error. 2718 */ 2719struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2720 const struct ieee80211_ops *ops); 2721 2722/** 2723 * ieee80211_register_hw - Register hardware device 2724 * 2725 * You must call this function before any other functions in 2726 * mac80211. Note that before a hardware can be registered, you 2727 * need to fill the contained wiphy's information. 2728 * 2729 * @hw: the device to register as returned by ieee80211_alloc_hw() 2730 * 2731 * Return: 0 on success. An error code otherwise. 2732 */ 2733int ieee80211_register_hw(struct ieee80211_hw *hw); 2734 2735/** 2736 * struct ieee80211_tpt_blink - throughput blink description 2737 * @throughput: throughput in Kbit/sec 2738 * @blink_time: blink time in milliseconds 2739 * (full cycle, ie. one off + one on period) 2740 */ 2741struct ieee80211_tpt_blink { 2742 int throughput; 2743 int blink_time; 2744}; 2745 2746/** 2747 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2748 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2749 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2750 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2751 * interface is connected in some way, including being an AP 2752 */ 2753enum ieee80211_tpt_led_trigger_flags { 2754 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2755 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2756 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2757}; 2758 2759#ifdef CONFIG_MAC80211_LEDS 2760extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2761extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2762extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2763extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2764extern char *__ieee80211_create_tpt_led_trigger( 2765 struct ieee80211_hw *hw, unsigned int flags, 2766 const struct ieee80211_tpt_blink *blink_table, 2767 unsigned int blink_table_len); 2768#endif 2769/** 2770 * ieee80211_get_tx_led_name - get name of TX LED 2771 * 2772 * mac80211 creates a transmit 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_tx_led_name(struct ieee80211_hw *hw) 2782{ 2783#ifdef CONFIG_MAC80211_LEDS 2784 return __ieee80211_get_tx_led_name(hw); 2785#else 2786 return NULL; 2787#endif 2788} 2789 2790/** 2791 * ieee80211_get_rx_led_name - get name of RX LED 2792 * 2793 * mac80211 creates a receive 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_rx_led_name(struct ieee80211_hw *hw) 2803{ 2804#ifdef CONFIG_MAC80211_LEDS 2805 return __ieee80211_get_rx_led_name(hw); 2806#else 2807 return NULL; 2808#endif 2809} 2810 2811/** 2812 * ieee80211_get_assoc_led_name - get name of association LED 2813 * 2814 * mac80211 creates a association 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_assoc_led_name(struct ieee80211_hw *hw) 2824{ 2825#ifdef CONFIG_MAC80211_LEDS 2826 return __ieee80211_get_assoc_led_name(hw); 2827#else 2828 return NULL; 2829#endif 2830} 2831 2832/** 2833 * ieee80211_get_radio_led_name - get name of radio LED 2834 * 2835 * mac80211 creates a radio change LED trigger for each wireless hardware 2836 * that can be used to drive LEDs if your driver registers a LED device. 2837 * This function returns the name (or %NULL if not configured for LEDs) 2838 * of the trigger so you can automatically link the LED device. 2839 * 2840 * @hw: the hardware to get the LED trigger name for 2841 * 2842 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2843 */ 2844static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2845{ 2846#ifdef CONFIG_MAC80211_LEDS 2847 return __ieee80211_get_radio_led_name(hw); 2848#else 2849 return NULL; 2850#endif 2851} 2852 2853/** 2854 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2855 * @hw: the hardware to create the trigger for 2856 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2857 * @blink_table: the blink table -- needs to be ordered by throughput 2858 * @blink_table_len: size of the blink table 2859 * 2860 * Return: %NULL (in case of error, or if no LED triggers are 2861 * configured) or the name of the new trigger. 2862 * 2863 * Note: This function must be called before ieee80211_register_hw(). 2864 */ 2865static inline char * 2866ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2867 const struct ieee80211_tpt_blink *blink_table, 2868 unsigned int blink_table_len) 2869{ 2870#ifdef CONFIG_MAC80211_LEDS 2871 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2872 blink_table_len); 2873#else 2874 return NULL; 2875#endif 2876} 2877 2878/** 2879 * ieee80211_unregister_hw - Unregister a hardware device 2880 * 2881 * This function instructs mac80211 to free allocated resources 2882 * and unregister netdevices from the networking subsystem. 2883 * 2884 * @hw: the hardware to unregister 2885 */ 2886void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2887 2888/** 2889 * ieee80211_free_hw - free hardware descriptor 2890 * 2891 * This function frees everything that was allocated, including the 2892 * private data for the driver. You must call ieee80211_unregister_hw() 2893 * before calling this function. 2894 * 2895 * @hw: the hardware to free 2896 */ 2897void ieee80211_free_hw(struct ieee80211_hw *hw); 2898 2899/** 2900 * ieee80211_restart_hw - restart hardware completely 2901 * 2902 * Call this function when the hardware was restarted for some reason 2903 * (hardware error, ...) and the driver is unable to restore its state 2904 * by itself. mac80211 assumes that at this point the driver/hardware 2905 * is completely uninitialised and stopped, it starts the process by 2906 * calling the ->start() operation. The driver will need to reset all 2907 * internal state that it has prior to calling this function. 2908 * 2909 * @hw: the hardware to restart 2910 */ 2911void ieee80211_restart_hw(struct ieee80211_hw *hw); 2912 2913/** ieee80211_napi_schedule - schedule NAPI poll 2914 * 2915 * Use this function to schedule NAPI polling on a device. 2916 * 2917 * @hw: the hardware to start polling 2918 */ 2919void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2920 2921/** ieee80211_napi_complete - complete NAPI polling 2922 * 2923 * Use this function to finish NAPI polling on a device. 2924 * 2925 * @hw: the hardware to stop polling 2926 */ 2927void ieee80211_napi_complete(struct ieee80211_hw *hw); 2928 2929/** 2930 * ieee80211_rx - receive frame 2931 * 2932 * Use this function to hand received frames to mac80211. The receive 2933 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2934 * paged @skb is used, the driver is recommended to put the ieee80211 2935 * header of the frame on the linear part of the @skb to avoid memory 2936 * allocation and/or memcpy by the stack. 2937 * 2938 * This function may not be called in IRQ context. Calls to this function 2939 * for a single hardware must be synchronized against each other. Calls to 2940 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2941 * mixed for a single hardware. 2942 * 2943 * In process context use instead ieee80211_rx_ni(). 2944 * 2945 * @hw: the hardware this frame came in on 2946 * @skb: the buffer to receive, owned by mac80211 after this call 2947 */ 2948void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2949 2950/** 2951 * ieee80211_rx_irqsafe - receive frame 2952 * 2953 * Like ieee80211_rx() but can be called in IRQ context 2954 * (internally defers to a tasklet.) 2955 * 2956 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2957 * be mixed for a single hardware. 2958 * 2959 * @hw: the hardware this frame came in on 2960 * @skb: the buffer to receive, owned by mac80211 after this call 2961 */ 2962void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2963 2964/** 2965 * ieee80211_rx_ni - receive frame (in process context) 2966 * 2967 * Like ieee80211_rx() but can be called in process context 2968 * (internally disables bottom halves). 2969 * 2970 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2971 * not be mixed for a single hardware. 2972 * 2973 * @hw: the hardware this frame came in on 2974 * @skb: the buffer to receive, owned by mac80211 after this call 2975 */ 2976static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2977 struct sk_buff *skb) 2978{ 2979 local_bh_disable(); 2980 ieee80211_rx(hw, skb); 2981 local_bh_enable(); 2982} 2983 2984/** 2985 * ieee80211_sta_ps_transition - PS transition for connected sta 2986 * 2987 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2988 * flag set, use this function to inform mac80211 about a connected station 2989 * entering/leaving PS mode. 2990 * 2991 * This function may not be called in IRQ context or with softirqs enabled. 2992 * 2993 * Calls to this function for a single hardware must be synchronized against 2994 * each other. 2995 * 2996 * @sta: currently connected sta 2997 * @start: start or stop PS 2998 * 2999 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3000 */ 3001int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3002 3003/** 3004 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3005 * (in process context) 3006 * 3007 * Like ieee80211_sta_ps_transition() but can be called in process context 3008 * (internally disables bottom halves). Concurrent call restriction still 3009 * applies. 3010 * 3011 * @sta: currently connected sta 3012 * @start: start or stop PS 3013 * 3014 * Return: Like ieee80211_sta_ps_transition(). 3015 */ 3016static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3017 bool start) 3018{ 3019 int ret; 3020 3021 local_bh_disable(); 3022 ret = ieee80211_sta_ps_transition(sta, start); 3023 local_bh_enable(); 3024 3025 return ret; 3026} 3027 3028/* 3029 * The TX headroom reserved by mac80211 for its own tx_status functions. 3030 * This is enough for the radiotap header. 3031 */ 3032#define IEEE80211_TX_STATUS_HEADROOM 14 3033 3034/** 3035 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3036 * @sta: &struct ieee80211_sta pointer for the sleeping station 3037 * @tid: the TID that has buffered frames 3038 * @buffered: indicates whether or not frames are buffered for this TID 3039 * 3040 * If a driver buffers frames for a powersave station instead of passing 3041 * them back to mac80211 for retransmission, the station may still need 3042 * to be told that there are buffered frames via the TIM bit. 3043 * 3044 * This function informs mac80211 whether or not there are frames that are 3045 * buffered in the driver for a given TID; mac80211 can then use this data 3046 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3047 * call! Beware of the locking!) 3048 * 3049 * If all frames are released to the station (due to PS-poll or uAPSD) 3050 * then the driver needs to inform mac80211 that there no longer are 3051 * frames buffered. However, when the station wakes up mac80211 assumes 3052 * that all buffered frames will be transmitted and clears this data, 3053 * drivers need to make sure they inform mac80211 about all buffered 3054 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3055 * 3056 * Note that technically mac80211 only needs to know this per AC, not per 3057 * TID, but since driver buffering will inevitably happen per TID (since 3058 * it is related to aggregation) it is easier to make mac80211 map the 3059 * TID to the AC as required instead of keeping track in all drivers that 3060 * use this API. 3061 */ 3062void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3063 u8 tid, bool buffered); 3064 3065/** 3066 * ieee80211_tx_status - transmit status callback 3067 * 3068 * Call this function for all transmitted frames after they have been 3069 * transmitted. It is permissible to not call this function for 3070 * multicast frames but this can affect statistics. 3071 * 3072 * This function may not be called in IRQ context. Calls to this function 3073 * for a single hardware must be synchronized against each other. Calls 3074 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3075 * may not be mixed for a single hardware. 3076 * 3077 * @hw: the hardware the frame was transmitted by 3078 * @skb: the frame that was transmitted, owned by mac80211 after this call 3079 */ 3080void ieee80211_tx_status(struct ieee80211_hw *hw, 3081 struct sk_buff *skb); 3082 3083/** 3084 * ieee80211_tx_status_ni - transmit status callback (in process context) 3085 * 3086 * Like ieee80211_tx_status() but can be called in process context. 3087 * 3088 * Calls to this function, ieee80211_tx_status() and 3089 * ieee80211_tx_status_irqsafe() may not be mixed 3090 * for a single hardware. 3091 * 3092 * @hw: the hardware the frame was transmitted by 3093 * @skb: the frame that was transmitted, owned by mac80211 after this call 3094 */ 3095static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3096 struct sk_buff *skb) 3097{ 3098 local_bh_disable(); 3099 ieee80211_tx_status(hw, skb); 3100 local_bh_enable(); 3101} 3102 3103/** 3104 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3105 * 3106 * Like ieee80211_tx_status() but can be called in IRQ context 3107 * (internally defers to a tasklet.) 3108 * 3109 * Calls to this function, ieee80211_tx_status() and 3110 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3111 * 3112 * @hw: the hardware the frame was transmitted by 3113 * @skb: the frame that was transmitted, owned by mac80211 after this call 3114 */ 3115void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3116 struct sk_buff *skb); 3117 3118/** 3119 * ieee80211_report_low_ack - report non-responding station 3120 * 3121 * When operating in AP-mode, call this function to report a non-responding 3122 * connected STA. 3123 * 3124 * @sta: the non-responding connected sta 3125 * @num_packets: number of packets sent to @sta without a response 3126 */ 3127void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3128 3129/** 3130 * ieee80211_beacon_get_tim - beacon generation function 3131 * @hw: pointer obtained from ieee80211_alloc_hw(). 3132 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3133 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3134 * Set to 0 if invalid (in non-AP modes). 3135 * @tim_length: pointer to variable that will receive the TIM IE length, 3136 * (including the ID and length bytes!). 3137 * Set to 0 if invalid (in non-AP modes). 3138 * 3139 * If the driver implements beaconing modes, it must use this function to 3140 * obtain the beacon frame/template. 3141 * 3142 * If the beacon frames are generated by the host system (i.e., not in 3143 * hardware/firmware), the driver uses this function to get each beacon 3144 * frame from mac80211 -- it is responsible for calling this function 3145 * before the beacon is needed (e.g. based on hardware interrupt). 3146 * 3147 * If the beacon frames are generated by the device, then the driver 3148 * must use the returned beacon as the template and change the TIM IE 3149 * according to the current DTIM parameters/TIM bitmap. 3150 * 3151 * The driver is responsible for freeing the returned skb. 3152 * 3153 * Return: The beacon template. %NULL on error. 3154 */ 3155struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3156 struct ieee80211_vif *vif, 3157 u16 *tim_offset, u16 *tim_length); 3158 3159/** 3160 * ieee80211_beacon_get - beacon generation function 3161 * @hw: pointer obtained from ieee80211_alloc_hw(). 3162 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3163 * 3164 * See ieee80211_beacon_get_tim(). 3165 * 3166 * Return: See ieee80211_beacon_get_tim(). 3167 */ 3168static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3169 struct ieee80211_vif *vif) 3170{ 3171 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3172} 3173 3174/** 3175 * ieee80211_proberesp_get - retrieve a Probe Response template 3176 * @hw: pointer obtained from ieee80211_alloc_hw(). 3177 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3178 * 3179 * Creates a Probe Response template which can, for example, be uploaded to 3180 * hardware. The destination address should be set by the caller. 3181 * 3182 * Can only be called in AP mode. 3183 * 3184 * Return: The Probe Response template. %NULL on error. 3185 */ 3186struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3187 struct ieee80211_vif *vif); 3188 3189/** 3190 * ieee80211_pspoll_get - retrieve a PS Poll template 3191 * @hw: pointer obtained from ieee80211_alloc_hw(). 3192 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3193 * 3194 * Creates a PS Poll a template which can, for example, uploaded to 3195 * hardware. The template must be updated after association so that correct 3196 * AID, BSSID and MAC address is used. 3197 * 3198 * Note: Caller (or hardware) is responsible for setting the 3199 * &IEEE80211_FCTL_PM bit. 3200 * 3201 * Return: The PS Poll template. %NULL on error. 3202 */ 3203struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3204 struct ieee80211_vif *vif); 3205 3206/** 3207 * ieee80211_nullfunc_get - retrieve a nullfunc template 3208 * @hw: pointer obtained from ieee80211_alloc_hw(). 3209 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3210 * 3211 * Creates a Nullfunc template which can, for example, uploaded to 3212 * hardware. The template must be updated after association so that correct 3213 * BSSID and address is used. 3214 * 3215 * Note: Caller (or hardware) is responsible for setting the 3216 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3217 * 3218 * Return: The nullfunc template. %NULL on error. 3219 */ 3220struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3221 struct ieee80211_vif *vif); 3222 3223/** 3224 * ieee80211_probereq_get - retrieve a Probe Request template 3225 * @hw: pointer obtained from ieee80211_alloc_hw(). 3226 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3227 * @ssid: SSID buffer 3228 * @ssid_len: length of SSID 3229 * @tailroom: tailroom to reserve at end of SKB for IEs 3230 * 3231 * Creates a Probe Request template which can, for example, be uploaded to 3232 * hardware. 3233 * 3234 * Return: The Probe Request template. %NULL on error. 3235 */ 3236struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3237 struct ieee80211_vif *vif, 3238 const u8 *ssid, size_t ssid_len, 3239 size_t tailroom); 3240 3241/** 3242 * ieee80211_rts_get - RTS frame generation function 3243 * @hw: pointer obtained from ieee80211_alloc_hw(). 3244 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3245 * @frame: pointer to the frame that is going to be protected by the RTS. 3246 * @frame_len: the frame length (in octets). 3247 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3248 * @rts: The buffer where to store the RTS frame. 3249 * 3250 * If the RTS frames are generated by the host system (i.e., not in 3251 * hardware/firmware), the low-level driver uses this function to receive 3252 * the next RTS frame from the 802.11 code. The low-level is responsible 3253 * for calling this function before and RTS frame is needed. 3254 */ 3255void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3256 const void *frame, size_t frame_len, 3257 const struct ieee80211_tx_info *frame_txctl, 3258 struct ieee80211_rts *rts); 3259 3260/** 3261 * ieee80211_rts_duration - Get the duration field for an RTS frame 3262 * @hw: pointer obtained from ieee80211_alloc_hw(). 3263 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3264 * @frame_len: the length of the frame that is going to be protected by the RTS. 3265 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3266 * 3267 * If the RTS is generated in firmware, but the host system must provide 3268 * the duration field, the low-level driver uses this function to receive 3269 * the duration field value in little-endian byteorder. 3270 * 3271 * Return: The duration. 3272 */ 3273__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3274 struct ieee80211_vif *vif, size_t frame_len, 3275 const struct ieee80211_tx_info *frame_txctl); 3276 3277/** 3278 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3279 * @hw: pointer obtained from ieee80211_alloc_hw(). 3280 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3281 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3282 * @frame_len: the frame length (in octets). 3283 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3284 * @cts: The buffer where to store the CTS-to-self frame. 3285 * 3286 * If the CTS-to-self frames are generated by the host system (i.e., not in 3287 * hardware/firmware), the low-level driver uses this function to receive 3288 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3289 * for calling this function before and CTS-to-self frame is needed. 3290 */ 3291void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3292 struct ieee80211_vif *vif, 3293 const void *frame, size_t frame_len, 3294 const struct ieee80211_tx_info *frame_txctl, 3295 struct ieee80211_cts *cts); 3296 3297/** 3298 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3299 * @hw: pointer obtained from ieee80211_alloc_hw(). 3300 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3301 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3302 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3303 * 3304 * If the CTS-to-self is generated in firmware, but the host system must provide 3305 * the duration field, the low-level driver uses this function to receive 3306 * the duration field value in little-endian byteorder. 3307 * 3308 * Return: The duration. 3309 */ 3310__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3311 struct ieee80211_vif *vif, 3312 size_t frame_len, 3313 const struct ieee80211_tx_info *frame_txctl); 3314 3315/** 3316 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3317 * @hw: pointer obtained from ieee80211_alloc_hw(). 3318 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3319 * @band: the band to calculate the frame duration on 3320 * @frame_len: the length of the frame. 3321 * @rate: the rate at which the frame is going to be transmitted. 3322 * 3323 * Calculate the duration field of some generic frame, given its 3324 * length and transmission rate (in 100kbps). 3325 * 3326 * Return: The duration. 3327 */ 3328__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3329 struct ieee80211_vif *vif, 3330 enum ieee80211_band band, 3331 size_t frame_len, 3332 struct ieee80211_rate *rate); 3333 3334/** 3335 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3336 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3337 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3338 * 3339 * Function for accessing buffered broadcast and multicast frames. If 3340 * hardware/firmware does not implement buffering of broadcast/multicast 3341 * frames when power saving is used, 802.11 code buffers them in the host 3342 * memory. The low-level driver uses this function to fetch next buffered 3343 * frame. In most cases, this is used when generating beacon frame. 3344 * 3345 * Return: A pointer to the next buffered skb or NULL if no more buffered 3346 * frames are available. 3347 * 3348 * Note: buffered frames are returned only after DTIM beacon frame was 3349 * generated with ieee80211_beacon_get() and the low-level driver must thus 3350 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3351 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3352 * does not need to check for DTIM beacons separately and should be able to 3353 * use common code for all beacons. 3354 */ 3355struct sk_buff * 3356ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3357 3358/** 3359 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3360 * 3361 * This function returns the TKIP phase 1 key for the given IV32. 3362 * 3363 * @keyconf: the parameter passed with the set key 3364 * @iv32: IV32 to get the P1K for 3365 * @p1k: a buffer to which the key will be written, as 5 u16 values 3366 */ 3367void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3368 u32 iv32, u16 *p1k); 3369 3370/** 3371 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3372 * 3373 * This function returns the TKIP phase 1 key for the IV32 taken 3374 * from the given packet. 3375 * 3376 * @keyconf: the parameter passed with the set key 3377 * @skb: the packet to take the IV32 value from that will be encrypted 3378 * with this P1K 3379 * @p1k: a buffer to which the key will be written, as 5 u16 values 3380 */ 3381static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3382 struct sk_buff *skb, u16 *p1k) 3383{ 3384 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3385 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3386 u32 iv32 = get_unaligned_le32(&data[4]); 3387 3388 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3389} 3390 3391/** 3392 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3393 * 3394 * This function returns the TKIP phase 1 key for the given IV32 3395 * and transmitter address. 3396 * 3397 * @keyconf: the parameter passed with the set key 3398 * @ta: TA that will be used with the key 3399 * @iv32: IV32 to get the P1K for 3400 * @p1k: a buffer to which the key will be written, as 5 u16 values 3401 */ 3402void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3403 const u8 *ta, u32 iv32, u16 *p1k); 3404 3405/** 3406 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3407 * 3408 * This function computes the TKIP RC4 key for the IV values 3409 * in the packet. 3410 * 3411 * @keyconf: the parameter passed with the set key 3412 * @skb: the packet to take the IV32/IV16 values from that will be 3413 * encrypted with this key 3414 * @p2k: a buffer to which the key will be written, 16 bytes 3415 */ 3416void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3417 struct sk_buff *skb, u8 *p2k); 3418 3419/** 3420 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3421 * 3422 * This function computes the two AES-CMAC sub-keys, based on the 3423 * previously installed master key. 3424 * 3425 * @keyconf: the parameter passed with the set key 3426 * @k1: a buffer to be filled with the 1st sub-key 3427 * @k2: a buffer to be filled with the 2nd sub-key 3428 */ 3429void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3430 u8 *k1, u8 *k2); 3431 3432/** 3433 * struct ieee80211_key_seq - key sequence counter 3434 * 3435 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3436 * @ccmp: PN data, most significant byte first (big endian, 3437 * reverse order than in packet) 3438 * @aes_cmac: PN data, most significant byte first (big endian, 3439 * reverse order than in packet) 3440 */ 3441struct ieee80211_key_seq { 3442 union { 3443 struct { 3444 u32 iv32; 3445 u16 iv16; 3446 } tkip; 3447 struct { 3448 u8 pn[6]; 3449 } ccmp; 3450 struct { 3451 u8 pn[6]; 3452 } aes_cmac; 3453 }; 3454}; 3455 3456/** 3457 * ieee80211_get_key_tx_seq - get key TX sequence counter 3458 * 3459 * @keyconf: the parameter passed with the set key 3460 * @seq: buffer to receive the sequence data 3461 * 3462 * This function allows a driver to retrieve the current TX IV/PN 3463 * for the given key. It must not be called if IV generation is 3464 * offloaded to the device. 3465 * 3466 * Note that this function may only be called when no TX processing 3467 * can be done concurrently, for example when queues are stopped 3468 * and the stop has been synchronized. 3469 */ 3470void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3471 struct ieee80211_key_seq *seq); 3472 3473/** 3474 * ieee80211_get_key_rx_seq - get key RX sequence counter 3475 * 3476 * @keyconf: the parameter passed with the set key 3477 * @tid: The TID, or -1 for the management frame value (CCMP only); 3478 * the value on TID 0 is also used for non-QoS frames. For 3479 * CMAC, only TID 0 is valid. 3480 * @seq: buffer to receive the sequence data 3481 * 3482 * This function allows a driver to retrieve the current RX IV/PNs 3483 * for the given key. It must not be called if IV checking is done 3484 * by the device and not by mac80211. 3485 * 3486 * Note that this function may only be called when no RX processing 3487 * can be done concurrently. 3488 */ 3489void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3490 int tid, struct ieee80211_key_seq *seq); 3491 3492/** 3493 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3494 * @vif: virtual interface the rekeying was done on 3495 * @bssid: The BSSID of the AP, for checking association 3496 * @replay_ctr: the new replay counter after GTK rekeying 3497 * @gfp: allocation flags 3498 */ 3499void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3500 const u8 *replay_ctr, gfp_t gfp); 3501 3502/** 3503 * ieee80211_wake_queue - wake specific queue 3504 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3505 * @queue: queue number (counted from zero). 3506 * 3507 * Drivers should use this function instead of netif_wake_queue. 3508 */ 3509void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3510 3511/** 3512 * ieee80211_stop_queue - stop specific queue 3513 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3514 * @queue: queue number (counted from zero). 3515 * 3516 * Drivers should use this function instead of netif_stop_queue. 3517 */ 3518void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3519 3520/** 3521 * ieee80211_queue_stopped - test status of the queue 3522 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3523 * @queue: queue number (counted from zero). 3524 * 3525 * Drivers should use this function instead of netif_stop_queue. 3526 * 3527 * Return: %true if the queue is stopped. %false otherwise. 3528 */ 3529 3530int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3531 3532/** 3533 * ieee80211_stop_queues - stop all queues 3534 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3535 * 3536 * Drivers should use this function instead of netif_stop_queue. 3537 */ 3538void ieee80211_stop_queues(struct ieee80211_hw *hw); 3539 3540/** 3541 * ieee80211_wake_queues - wake all queues 3542 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3543 * 3544 * Drivers should use this function instead of netif_wake_queue. 3545 */ 3546void ieee80211_wake_queues(struct ieee80211_hw *hw); 3547 3548/** 3549 * ieee80211_scan_completed - completed hardware scan 3550 * 3551 * When hardware scan offload is used (i.e. the hw_scan() callback is 3552 * assigned) this function needs to be called by the driver to notify 3553 * mac80211 that the scan finished. This function can be called from 3554 * any context, including hardirq context. 3555 * 3556 * @hw: the hardware that finished the scan 3557 * @aborted: set to true if scan was aborted 3558 */ 3559void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3560 3561/** 3562 * ieee80211_sched_scan_results - got results from scheduled scan 3563 * 3564 * When a scheduled scan is running, this function needs to be called by the 3565 * driver whenever there are new scan results available. 3566 * 3567 * @hw: the hardware that is performing scheduled scans 3568 */ 3569void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3570 3571/** 3572 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3573 * 3574 * When a scheduled scan is running, this function can be called by 3575 * the driver if it needs to stop the scan to perform another task. 3576 * Usual scenarios are drivers that cannot continue the scheduled scan 3577 * while associating, for instance. 3578 * 3579 * @hw: the hardware that is performing scheduled scans 3580 */ 3581void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3582 3583/** 3584 * enum ieee80211_interface_iteration_flags - interface iteration flags 3585 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3586 * been added to the driver; However, note that during hardware 3587 * reconfiguration (after restart_hw) it will iterate over a new 3588 * interface and over all the existing interfaces even if they 3589 * haven't been re-added to the driver yet. 3590 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3591 * interfaces, even if they haven't been re-added to the driver yet. 3592 */ 3593enum ieee80211_interface_iteration_flags { 3594 IEEE80211_IFACE_ITER_NORMAL = 0, 3595 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3596}; 3597 3598/** 3599 * ieee80211_iterate_active_interfaces - 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 allows the iterator function to sleep, when the iterator 3604 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3605 * be used. 3606 * Does not iterate over a new interface during add_interface(). 3607 * 3608 * @hw: the hardware struct of which the interfaces should be iterated over 3609 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3610 * @iterator: the iterator function to call 3611 * @data: first argument of the iterator function 3612 */ 3613void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3614 u32 iter_flags, 3615 void (*iterator)(void *data, u8 *mac, 3616 struct ieee80211_vif *vif), 3617 void *data); 3618 3619/** 3620 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3621 * 3622 * This function iterates over the interfaces associated with a given 3623 * hardware that are currently active and calls the callback for them. 3624 * This function requires the iterator callback function to be atomic, 3625 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3626 * Does not iterate over a new interface during add_interface(). 3627 * 3628 * @hw: the hardware struct of which the interfaces should be iterated over 3629 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3630 * @iterator: the iterator function to call, cannot sleep 3631 * @data: first argument of the iterator function 3632 */ 3633void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3634 u32 iter_flags, 3635 void (*iterator)(void *data, 3636 u8 *mac, 3637 struct ieee80211_vif *vif), 3638 void *data); 3639 3640/** 3641 * ieee80211_queue_work - add work onto the mac80211 workqueue 3642 * 3643 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3644 * This helper ensures drivers are not queueing work when they should not be. 3645 * 3646 * @hw: the hardware struct for the interface we are adding work for 3647 * @work: the work we want to add onto the mac80211 workqueue 3648 */ 3649void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3650 3651/** 3652 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3653 * 3654 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3655 * workqueue. 3656 * 3657 * @hw: the hardware struct for the interface we are adding work for 3658 * @dwork: delayable work to queue onto the mac80211 workqueue 3659 * @delay: number of jiffies to wait before queueing 3660 */ 3661void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3662 struct delayed_work *dwork, 3663 unsigned long delay); 3664 3665/** 3666 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3667 * @sta: the station for which to start a BA session 3668 * @tid: the TID to BA on. 3669 * @timeout: session timeout value (in TUs) 3670 * 3671 * Return: success if addBA request was sent, failure otherwise 3672 * 3673 * Although mac80211/low level driver/user space application can estimate 3674 * the need to start aggregation on a certain RA/TID, the session level 3675 * will be managed by the mac80211. 3676 */ 3677int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3678 u16 timeout); 3679 3680/** 3681 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3682 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3683 * @ra: receiver address of the BA session recipient. 3684 * @tid: the TID to BA on. 3685 * 3686 * This function must be called by low level driver once it has 3687 * finished with preparations for the BA session. It can be called 3688 * from any context. 3689 */ 3690void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3691 u16 tid); 3692 3693/** 3694 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3695 * @sta: the station whose BA session to stop 3696 * @tid: the TID to stop BA. 3697 * 3698 * Return: negative error if the TID is invalid, or no aggregation active 3699 * 3700 * Although mac80211/low level driver/user space application can estimate 3701 * the need to stop aggregation on a certain RA/TID, the session level 3702 * will be managed by the mac80211. 3703 */ 3704int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3705 3706/** 3707 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3708 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3709 * @ra: receiver address of the BA session recipient. 3710 * @tid: the desired TID to BA on. 3711 * 3712 * This function must be called by low level driver once it has 3713 * finished with preparations for the BA session tear down. It 3714 * can be called from any context. 3715 */ 3716void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3717 u16 tid); 3718 3719/** 3720 * ieee80211_find_sta - find a station 3721 * 3722 * @vif: virtual interface to look for station on 3723 * @addr: station's address 3724 * 3725 * Return: The station, if found. %NULL otherwise. 3726 * 3727 * Note: This function must be called under RCU lock and the 3728 * resulting pointer is only valid under RCU lock as well. 3729 */ 3730struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3731 const u8 *addr); 3732 3733/** 3734 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3735 * 3736 * @hw: pointer as obtained from ieee80211_alloc_hw() 3737 * @addr: remote station's address 3738 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3739 * 3740 * Return: The station, if found. %NULL otherwise. 3741 * 3742 * Note: This function must be called under RCU lock and the 3743 * resulting pointer is only valid under RCU lock as well. 3744 * 3745 * NOTE: You may pass NULL for localaddr, but then you will just get 3746 * the first STA that matches the remote address 'addr'. 3747 * We can have multiple STA associated with multiple 3748 * logical stations (e.g. consider a station connecting to another 3749 * BSSID on the same AP hardware without disconnecting first). 3750 * In this case, the result of this method with localaddr NULL 3751 * is not reliable. 3752 * 3753 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3754 */ 3755struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3756 const u8 *addr, 3757 const u8 *localaddr); 3758 3759/** 3760 * ieee80211_sta_block_awake - block station from waking up 3761 * @hw: the hardware 3762 * @pubsta: the station 3763 * @block: whether to block or unblock 3764 * 3765 * Some devices require that all frames that are on the queues 3766 * for a specific station that went to sleep are flushed before 3767 * a poll response or frames after the station woke up can be 3768 * delivered to that it. Note that such frames must be rejected 3769 * by the driver as filtered, with the appropriate status flag. 3770 * 3771 * This function allows implementing this mode in a race-free 3772 * manner. 3773 * 3774 * To do this, a driver must keep track of the number of frames 3775 * still enqueued for a specific station. If this number is not 3776 * zero when the station goes to sleep, the driver must call 3777 * this function to force mac80211 to consider the station to 3778 * be asleep regardless of the station's actual state. Once the 3779 * number of outstanding frames reaches zero, the driver must 3780 * call this function again to unblock the station. That will 3781 * cause mac80211 to be able to send ps-poll responses, and if 3782 * the station queried in the meantime then frames will also 3783 * be sent out as a result of this. Additionally, the driver 3784 * will be notified that the station woke up some time after 3785 * it is unblocked, regardless of whether the station actually 3786 * woke up while blocked or not. 3787 */ 3788void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3789 struct ieee80211_sta *pubsta, bool block); 3790 3791/** 3792 * ieee80211_sta_eosp - notify mac80211 about end of SP 3793 * @pubsta: the station 3794 * 3795 * When a device transmits frames in a way that it can't tell 3796 * mac80211 in the TX status about the EOSP, it must clear the 3797 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3798 * This applies for PS-Poll as well as uAPSD. 3799 * 3800 * Note that there is no non-_irqsafe version right now as 3801 * it wasn't needed, but just like _tx_status() and _rx() 3802 * must not be mixed in irqsafe/non-irqsafe versions, this 3803 * function must not be mixed with those either. Use the 3804 * all irqsafe, or all non-irqsafe, don't mix! If you need 3805 * the non-irqsafe version of this, you need to add it. 3806 */ 3807void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3808 3809/** 3810 * ieee80211_iter_keys - iterate keys programmed into the device 3811 * @hw: pointer obtained from ieee80211_alloc_hw() 3812 * @vif: virtual interface to iterate, may be %NULL for all 3813 * @iter: iterator function that will be called for each key 3814 * @iter_data: custom data to pass to the iterator function 3815 * 3816 * This function can be used to iterate all the keys known to 3817 * mac80211, even those that weren't previously programmed into 3818 * the device. This is intended for use in WoWLAN if the device 3819 * needs reprogramming of the keys during suspend. Note that due 3820 * to locking reasons, it is also only safe to call this at few 3821 * spots since it must hold the RTNL and be able to sleep. 3822 * 3823 * The order in which the keys are iterated matches the order 3824 * in which they were originally installed and handed to the 3825 * set_key callback. 3826 */ 3827void ieee80211_iter_keys(struct ieee80211_hw *hw, 3828 struct ieee80211_vif *vif, 3829 void (*iter)(struct ieee80211_hw *hw, 3830 struct ieee80211_vif *vif, 3831 struct ieee80211_sta *sta, 3832 struct ieee80211_key_conf *key, 3833 void *data), 3834 void *iter_data); 3835 3836/** 3837 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 3838 * @hw: pointre obtained from ieee80211_alloc_hw(). 3839 * @iter: iterator function 3840 * @iter_data: data passed to iterator function 3841 * 3842 * Iterate all active channel contexts. This function is atomic and 3843 * doesn't acquire any locks internally that might be held in other 3844 * places while calling into the driver. 3845 * 3846 * The iterator will not find a context that's being added (during 3847 * the driver callback to add it) but will find it while it's being 3848 * removed. 3849 * 3850 * Note that during hardware restart, all contexts that existed 3851 * before the restart are considered already present so will be 3852 * found while iterating, whether they've been re-added already 3853 * or not. 3854 */ 3855void ieee80211_iter_chan_contexts_atomic( 3856 struct ieee80211_hw *hw, 3857 void (*iter)(struct ieee80211_hw *hw, 3858 struct ieee80211_chanctx_conf *chanctx_conf, 3859 void *data), 3860 void *iter_data); 3861 3862/** 3863 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3864 * @hw: pointer obtained from ieee80211_alloc_hw(). 3865 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3866 * 3867 * Creates a Probe Request template which can, for example, be uploaded to 3868 * hardware. The template is filled with bssid, ssid and supported rate 3869 * information. This function must only be called from within the 3870 * .bss_info_changed callback function and only in managed mode. The function 3871 * is only useful when the interface is associated, otherwise it will return 3872 * %NULL. 3873 * 3874 * Return: The Probe Request template. %NULL on error. 3875 */ 3876struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3877 struct ieee80211_vif *vif); 3878 3879/** 3880 * ieee80211_beacon_loss - inform hardware does not receive beacons 3881 * 3882 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3883 * 3884 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3885 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3886 * hardware is not receiving beacons with this function. 3887 */ 3888void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3889 3890/** 3891 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3892 * 3893 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3894 * 3895 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3896 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3897 * needs to inform if the connection to the AP has been lost. 3898 * The function may also be called if the connection needs to be terminated 3899 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 3900 * 3901 * This function will cause immediate change to disassociated state, 3902 * without connection recovery attempts. 3903 */ 3904void ieee80211_connection_loss(struct ieee80211_vif *vif); 3905 3906/** 3907 * ieee80211_resume_disconnect - disconnect from AP after resume 3908 * 3909 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3910 * 3911 * Instructs mac80211 to disconnect from the AP after resume. 3912 * Drivers can use this after WoWLAN if they know that the 3913 * connection cannot be kept up, for example because keys were 3914 * used while the device was asleep but the replay counters or 3915 * similar cannot be retrieved from the device during resume. 3916 * 3917 * Note that due to implementation issues, if the driver uses 3918 * the reconfiguration functionality during resume the interface 3919 * will still be added as associated first during resume and then 3920 * disconnect normally later. 3921 * 3922 * This function can only be called from the resume callback and 3923 * the driver must not be holding any of its own locks while it 3924 * calls this function, or at least not any locks it needs in the 3925 * key configuration paths (if it supports HW crypto). 3926 */ 3927void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3928 3929/** 3930 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3931 * 3932 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3933 * 3934 * Some hardware require full power save to manage simultaneous BT traffic 3935 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3936 * burst of BT traffic. The hardware gets information of BT traffic via 3937 * hardware co-existence lines, and consequentially requests mac80211 to 3938 * (temporarily) enter full psm. 3939 * This function will only temporarily disable dynamic PS, not enable PSM if 3940 * it was not already enabled. 3941 * The driver must make sure to re-enable dynamic PS using 3942 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3943 * 3944 */ 3945void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3946 3947/** 3948 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3949 * 3950 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3951 * 3952 * This function restores dynamic PS after being temporarily disabled via 3953 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3954 * be coupled with an eventual call to this function. 3955 * 3956 */ 3957void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3958 3959/** 3960 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3961 * rssi threshold triggered 3962 * 3963 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3964 * @rssi_event: the RSSI trigger event type 3965 * @gfp: context flags 3966 * 3967 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3968 * monitoring is configured with an rssi threshold, the driver will inform 3969 * whenever the rssi level reaches the threshold. 3970 */ 3971void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3972 enum nl80211_cqm_rssi_threshold_event rssi_event, 3973 gfp_t gfp); 3974 3975/** 3976 * ieee80211_chswitch_done - Complete channel switch process 3977 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3978 * @success: make the channel switch successful or not 3979 * 3980 * Complete the channel switch post-process: set the new operational channel 3981 * and wake up the suspended queues. 3982 */ 3983void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3984 3985/** 3986 * ieee80211_request_smps - request SM PS transition 3987 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3988 * @smps_mode: new SM PS mode 3989 * 3990 * This allows the driver to request an SM PS transition in managed 3991 * mode. This is useful when the driver has more information than 3992 * the stack about possible interference, for example by bluetooth. 3993 */ 3994void ieee80211_request_smps(struct ieee80211_vif *vif, 3995 enum ieee80211_smps_mode smps_mode); 3996 3997/** 3998 * ieee80211_ready_on_channel - notification of remain-on-channel start 3999 * @hw: pointer as obtained from ieee80211_alloc_hw() 4000 */ 4001void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4002 4003/** 4004 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4005 * @hw: pointer as obtained from ieee80211_alloc_hw() 4006 */ 4007void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4008 4009/** 4010 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4011 * 4012 * in order not to harm the system performance and user experience, the device 4013 * may request not to allow any rx ba session and tear down existing rx ba 4014 * sessions based on system constraints such as periodic BT activity that needs 4015 * to limit wlan activity (eg.sco or a2dp)." 4016 * in such cases, the intention is to limit the duration of the rx ppdu and 4017 * therefore prevent the peer device to use a-mpdu aggregation. 4018 * 4019 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4020 * @ba_rx_bitmap: Bit map of open rx ba per tid 4021 * @addr: & to bssid mac address 4022 */ 4023void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4024 const u8 *addr); 4025 4026/** 4027 * ieee80211_send_bar - send a BlockAckReq frame 4028 * 4029 * can be used to flush pending frames from the peer's aggregation reorder 4030 * buffer. 4031 * 4032 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4033 * @ra: the peer's destination address 4034 * @tid: the TID of the aggregation session 4035 * @ssn: the new starting sequence number for the receiver 4036 */ 4037void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4038 4039/* Rate control API */ 4040 4041/** 4042 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4043 * 4044 * @hw: The hardware the algorithm is invoked for. 4045 * @sband: The band this frame is being transmitted on. 4046 * @bss_conf: the current BSS configuration 4047 * @skb: the skb that will be transmitted, the control information in it needs 4048 * to be filled in 4049 * @reported_rate: The rate control algorithm can fill this in to indicate 4050 * which rate should be reported to userspace as the current rate and 4051 * used for rate calculations in the mesh network. 4052 * @rts: whether RTS will be used for this frame because it is longer than the 4053 * RTS threshold 4054 * @short_preamble: whether mac80211 will request short-preamble transmission 4055 * if the selected rate supports it 4056 * @max_rate_idx: user-requested maximum (legacy) rate 4057 * (deprecated; this will be removed once drivers get updated to use 4058 * rate_idx_mask) 4059 * @rate_idx_mask: user-requested (legacy) rate mask 4060 * @rate_idx_mcs_mask: user-requested MCS rate mask 4061 * @bss: whether this frame is sent out in AP or IBSS mode 4062 */ 4063struct ieee80211_tx_rate_control { 4064 struct ieee80211_hw *hw; 4065 struct ieee80211_supported_band *sband; 4066 struct ieee80211_bss_conf *bss_conf; 4067 struct sk_buff *skb; 4068 struct ieee80211_tx_rate reported_rate; 4069 bool rts, short_preamble; 4070 u8 max_rate_idx; 4071 u32 rate_idx_mask; 4072 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 4073 bool bss; 4074}; 4075 4076struct rate_control_ops { 4077 struct module *module; 4078 const char *name; 4079 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4080 void (*free)(void *priv); 4081 4082 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4083 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4084 struct ieee80211_sta *sta, void *priv_sta); 4085 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4086 struct ieee80211_sta *sta, void *priv_sta, 4087 u32 changed); 4088 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4089 void *priv_sta); 4090 4091 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4092 struct ieee80211_sta *sta, void *priv_sta, 4093 struct sk_buff *skb); 4094 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4095 struct ieee80211_tx_rate_control *txrc); 4096 4097 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4098 struct dentry *dir); 4099 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4100}; 4101 4102static inline int rate_supported(struct ieee80211_sta *sta, 4103 enum ieee80211_band band, 4104 int index) 4105{ 4106 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4107} 4108 4109/** 4110 * rate_control_send_low - helper for drivers for management/no-ack frames 4111 * 4112 * Rate control algorithms that agree to use the lowest rate to 4113 * send management frames and NO_ACK data with the respective hw 4114 * retries should use this in the beginning of their mac80211 get_rate 4115 * callback. If true is returned the rate control can simply return. 4116 * If false is returned we guarantee that sta and sta and priv_sta is 4117 * not null. 4118 * 4119 * Rate control algorithms wishing to do more intelligent selection of 4120 * rate for multicast/broadcast frames may choose to not use this. 4121 * 4122 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4123 * that this may be null. 4124 * @priv_sta: private rate control structure. This may be null. 4125 * @txrc: rate control information we sholud populate for mac80211. 4126 */ 4127bool rate_control_send_low(struct ieee80211_sta *sta, 4128 void *priv_sta, 4129 struct ieee80211_tx_rate_control *txrc); 4130 4131 4132static inline s8 4133rate_lowest_index(struct ieee80211_supported_band *sband, 4134 struct ieee80211_sta *sta) 4135{ 4136 int i; 4137 4138 for (i = 0; i < sband->n_bitrates; i++) 4139 if (rate_supported(sta, sband->band, i)) 4140 return i; 4141 4142 /* warn when we cannot find a rate. */ 4143 WARN_ON_ONCE(1); 4144 4145 /* and return 0 (the lowest index) */ 4146 return 0; 4147} 4148 4149static inline 4150bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4151 struct ieee80211_sta *sta) 4152{ 4153 unsigned int i; 4154 4155 for (i = 0; i < sband->n_bitrates; i++) 4156 if (rate_supported(sta, sband->band, i)) 4157 return true; 4158 return false; 4159} 4160 4161int ieee80211_rate_control_register(struct rate_control_ops *ops); 4162void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4163 4164static inline bool 4165conf_is_ht20(struct ieee80211_conf *conf) 4166{ 4167 return conf->channel_type == NL80211_CHAN_HT20; 4168} 4169 4170static inline bool 4171conf_is_ht40_minus(struct ieee80211_conf *conf) 4172{ 4173 return conf->channel_type == NL80211_CHAN_HT40MINUS; 4174} 4175 4176static inline bool 4177conf_is_ht40_plus(struct ieee80211_conf *conf) 4178{ 4179 return conf->channel_type == NL80211_CHAN_HT40PLUS; 4180} 4181 4182static inline bool 4183conf_is_ht40(struct ieee80211_conf *conf) 4184{ 4185 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 4186} 4187 4188static inline bool 4189conf_is_ht(struct ieee80211_conf *conf) 4190{ 4191 return conf->channel_type != NL80211_CHAN_NO_HT; 4192} 4193 4194static inline enum nl80211_iftype 4195ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4196{ 4197 if (p2p) { 4198 switch (type) { 4199 case NL80211_IFTYPE_STATION: 4200 return NL80211_IFTYPE_P2P_CLIENT; 4201 case NL80211_IFTYPE_AP: 4202 return NL80211_IFTYPE_P2P_GO; 4203 default: 4204 break; 4205 } 4206 } 4207 return type; 4208} 4209 4210static inline enum nl80211_iftype 4211ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4212{ 4213 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4214} 4215 4216void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4217 int rssi_min_thold, 4218 int rssi_max_thold); 4219 4220void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4221 4222/** 4223 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4224 * 4225 * @vif: the specified virtual interface 4226 * 4227 * Note: This function assumes that the given vif is valid. 4228 * 4229 * Return: The average RSSI value for the requested interface, or 0 if not 4230 * applicable. 4231 */ 4232int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4233 4234/** 4235 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4236 * @vif: virtual interface 4237 * @wakeup: wakeup reason(s) 4238 * @gfp: allocation flags 4239 * 4240 * See cfg80211_report_wowlan_wakeup(). 4241 */ 4242void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4243 struct cfg80211_wowlan_wakeup *wakeup, 4244 gfp_t gfp); 4245 4246#endif /* MAC80211_H */ 4247