mac80211.h revision 8921d04e8df7475d733d853564bdb001e83bf33f
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 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 151 */ 152enum ieee80211_chanctx_change { 153 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 154 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 155 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 156}; 157 158/** 159 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 160 * 161 * This is the driver-visible part. The ieee80211_chanctx 162 * that contains it is visible in mac80211 only. 163 * 164 * @def: the channel definition 165 * @rx_chains_static: The number of RX chains that must always be 166 * active on the channel to receive MIMO transmissions 167 * @rx_chains_dynamic: The number of RX chains that must be enabled 168 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 169 * this will always be >= @rx_chains_static. 170 * @radar_enabled: whether radar detection is enabled on this channel. 171 * @drv_priv: data area for driver use, will always be aligned to 172 * sizeof(void *), size is determined in hw information. 173 */ 174struct ieee80211_chanctx_conf { 175 struct cfg80211_chan_def def; 176 177 u8 rx_chains_static, rx_chains_dynamic; 178 179 bool radar_enabled; 180 181 u8 drv_priv[0] __aligned(sizeof(void *)); 182}; 183 184/** 185 * enum ieee80211_bss_change - BSS change notification flags 186 * 187 * These flags are used with the bss_info_changed() callback 188 * to indicate which BSS parameter changed. 189 * 190 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 191 * also implies a change in the AID. 192 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 193 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 194 * @BSS_CHANGED_ERP_SLOT: slot timing changed 195 * @BSS_CHANGED_HT: 802.11n parameters changed 196 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 197 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 198 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 199 * reason (IBSS and managed mode) 200 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 201 * new beacon (beaconing modes) 202 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 203 * enabled/disabled (beaconing modes) 204 * @BSS_CHANGED_CQM: Connection quality monitor config changed 205 * @BSS_CHANGED_IBSS: IBSS join status changed 206 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 207 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 208 * that it is only ever disabled for station mode. 209 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 210 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 211 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 212 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 213 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 214 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 215 * changed (currently only in P2P client mode, GO mode will be later) 216 * @BSS_CHANGED_DTIM_PERIOD: the DTIM period value was changed (set when 217 * it becomes valid, managed mode only) 218 */ 219enum ieee80211_bss_change { 220 BSS_CHANGED_ASSOC = 1<<0, 221 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 222 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 223 BSS_CHANGED_ERP_SLOT = 1<<3, 224 BSS_CHANGED_HT = 1<<4, 225 BSS_CHANGED_BASIC_RATES = 1<<5, 226 BSS_CHANGED_BEACON_INT = 1<<6, 227 BSS_CHANGED_BSSID = 1<<7, 228 BSS_CHANGED_BEACON = 1<<8, 229 BSS_CHANGED_BEACON_ENABLED = 1<<9, 230 BSS_CHANGED_CQM = 1<<10, 231 BSS_CHANGED_IBSS = 1<<11, 232 BSS_CHANGED_ARP_FILTER = 1<<12, 233 BSS_CHANGED_QOS = 1<<13, 234 BSS_CHANGED_IDLE = 1<<14, 235 BSS_CHANGED_SSID = 1<<15, 236 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 237 BSS_CHANGED_PS = 1<<17, 238 BSS_CHANGED_TXPOWER = 1<<18, 239 BSS_CHANGED_P2P_PS = 1<<19, 240 BSS_CHANGED_DTIM_PERIOD = 1<<20, 241 242 /* when adding here, make sure to change ieee80211_reconfig */ 243}; 244 245/* 246 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 247 * of addresses for an interface increase beyond this value, hardware ARP 248 * filtering will be disabled. 249 */ 250#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 251 252/** 253 * enum ieee80211_rssi_event - RSSI threshold event 254 * An indicator for when RSSI goes below/above a certain threshold. 255 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 256 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 257 */ 258enum ieee80211_rssi_event { 259 RSSI_EVENT_HIGH, 260 RSSI_EVENT_LOW, 261}; 262 263/** 264 * struct ieee80211_bss_conf - holds the BSS's changing parameters 265 * 266 * This structure keeps information about a BSS (and an association 267 * to that BSS) that can change during the lifetime of the BSS. 268 * 269 * @assoc: association status 270 * @ibss_joined: indicates whether this station is part of an IBSS 271 * or not 272 * @ibss_creator: indicates if a new IBSS network is being created 273 * @aid: association ID number, valid only when @assoc is true 274 * @use_cts_prot: use CTS protection 275 * @use_short_preamble: use 802.11b short preamble; 276 * if the hardware cannot handle this it must set the 277 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 278 * @use_short_slot: use short slot time (only relevant for ERP); 279 * if the hardware cannot handle this it must set the 280 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 281 * @dtim_period: num of beacons before the next DTIM, for beaconing, 282 * valid in station mode only if after the driver was notified 283 * with the %BSS_CHANGED_DTIM_PERIOD flag, will be non-zero then. 284 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 285 * as it may have been received during scanning long ago). If the 286 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 287 * only come from a beacon, but might not become valid until after 288 * association when a beacon is received (which is notified with the 289 * %BSS_CHANGED_DTIM flag.) 290 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 291 * the driver/device can use this to calculate synchronisation 292 * (see @sync_tsf) 293 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 294 * is requested, see @sync_tsf/@sync_device_ts. 295 * @beacon_int: beacon interval 296 * @assoc_capability: capabilities taken from assoc resp 297 * @basic_rates: bitmap of basic rates, each bit stands for an 298 * index into the rate table configured by the driver in 299 * the current band. 300 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 301 * @bssid: The BSSID for this BSS 302 * @enable_beacon: whether beaconing should be enabled or not 303 * @chandef: Channel definition for this BSS -- the hardware might be 304 * configured a higher bandwidth than this BSS uses, for example. 305 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 306 * This field is only valid when the channel type is one of the HT types. 307 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 308 * implies disabled 309 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 310 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 311 * may filter ARP queries targeted for other addresses than listed here. 312 * The driver must allow ARP queries targeted for all address listed here 313 * to pass through. An empty list implies no ARP queries need to pass. 314 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 315 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 316 * array size), it's up to the driver what to do in that case. 317 * @qos: This is a QoS-enabled BSS. 318 * @idle: This interface is idle. There's also a global idle flag in the 319 * hardware config which may be more appropriate depending on what 320 * your driver/device needs to do. 321 * @ps: power-save mode (STA only). This flag is NOT affected by 322 * offchannel/dynamic_ps operations. 323 * @ssid: The SSID of the current vif. Only valid in AP-mode. 324 * @ssid_len: Length of SSID given in @ssid. 325 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 326 * @txpower: TX power in dBm 327 * @p2p_ctwindow: P2P CTWindow, only for P2P client interfaces 328 * @p2p_oppps: P2P opportunistic PS is enabled 329 */ 330struct ieee80211_bss_conf { 331 const u8 *bssid; 332 /* association related data */ 333 bool assoc, ibss_joined; 334 bool ibss_creator; 335 u16 aid; 336 /* erp related data */ 337 bool use_cts_prot; 338 bool use_short_preamble; 339 bool use_short_slot; 340 bool enable_beacon; 341 u8 dtim_period; 342 u16 beacon_int; 343 u16 assoc_capability; 344 u64 sync_tsf; 345 u32 sync_device_ts; 346 u8 sync_dtim_count; 347 u32 basic_rates; 348 int mcast_rate[IEEE80211_NUM_BANDS]; 349 u16 ht_operation_mode; 350 s32 cqm_rssi_thold; 351 u32 cqm_rssi_hyst; 352 struct cfg80211_chan_def chandef; 353 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 354 int arp_addr_cnt; 355 bool qos; 356 bool idle; 357 bool ps; 358 u8 ssid[IEEE80211_MAX_SSID_LEN]; 359 size_t ssid_len; 360 bool hidden_ssid; 361 int txpower; 362 u8 p2p_ctwindow; 363 bool p2p_oppps; 364}; 365 366/** 367 * enum mac80211_tx_control_flags - flags to describe transmission information/status 368 * 369 * These flags are used with the @flags member of &ieee80211_tx_info. 370 * 371 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 372 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 373 * number to this frame, taking care of not overwriting the fragment 374 * number and increasing the sequence number only when the 375 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 376 * assign sequence numbers to QoS-data frames but cannot do so correctly 377 * for non-QoS-data and management frames because beacons need them from 378 * that counter as well and mac80211 cannot guarantee proper sequencing. 379 * If this flag is set, the driver should instruct the hardware to 380 * assign a sequence number to the frame or assign one itself. Cf. IEEE 381 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 382 * beacons and always be clear for frames without a sequence number field. 383 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 384 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 385 * station 386 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 387 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 388 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 389 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 390 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 391 * because the destination STA was in powersave mode. Note that to 392 * avoid race conditions, the filter must be set by the hardware or 393 * firmware upon receiving a frame that indicates that the station 394 * went to sleep (must be done on device to filter frames already on 395 * the queue) and may only be unset after mac80211 gives the OK for 396 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 397 * since only then is it guaranteed that no more frames are in the 398 * hardware queue. 399 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 400 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 401 * is for the whole aggregation. 402 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 403 * so consider using block ack request (BAR). 404 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 405 * set by rate control algorithms to indicate probe rate, will 406 * be cleared for fragmented frames (except on the last fragment) 407 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 408 * that a frame can be transmitted while the queues are stopped for 409 * off-channel operation. 410 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 411 * used to indicate that a pending frame requires TX processing before 412 * it can be sent out. 413 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 414 * used to indicate that a frame was already retried due to PS 415 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 416 * used to indicate frame should not be encrypted 417 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 418 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 419 * be sent although the station is in powersave mode. 420 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 421 * transmit function after the current frame, this can be used 422 * by drivers to kick the DMA queue only if unset or when the 423 * queue gets full. 424 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 425 * after TX status because the destination was asleep, it must not 426 * be modified again (no seqno assignment, crypto, etc.) 427 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 428 * code for connection establishment, this indicates that its status 429 * should kick the MLME state machine. 430 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 431 * MLME command (internal to mac80211 to figure out whether to send TX 432 * status to user space) 433 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 434 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 435 * frame and selects the maximum number of streams that it can use. 436 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 437 * the off-channel channel when a remain-on-channel offload is done 438 * in hardware -- normal packets still flow and are expected to be 439 * handled properly by the device. 440 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 441 * testing. It will be sent out with incorrect Michael MIC key to allow 442 * TKIP countermeasures to be tested. 443 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 444 * This flag is actually used for management frame especially for P2P 445 * frames not being sent at CCK rate in 2GHz band. 446 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 447 * when its status is reported the service period ends. For frames in 448 * an SP that mac80211 transmits, it is already set; for driver frames 449 * the driver may set this flag. It is also used to do the same for 450 * PS-Poll responses. 451 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 452 * This flag is used to send nullfunc frame at minimum rate when 453 * the nullfunc is used for connection monitoring purpose. 454 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 455 * would be fragmented by size (this is optional, only used for 456 * monitor injection). 457 * 458 * Note: If you have to add new flags to the enumeration, then don't 459 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 460 */ 461enum mac80211_tx_control_flags { 462 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 463 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 464 IEEE80211_TX_CTL_NO_ACK = BIT(2), 465 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 466 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 467 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 468 IEEE80211_TX_CTL_AMPDU = BIT(6), 469 IEEE80211_TX_CTL_INJECTED = BIT(7), 470 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 471 IEEE80211_TX_STAT_ACK = BIT(9), 472 IEEE80211_TX_STAT_AMPDU = BIT(10), 473 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 474 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 475 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 476 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 477 IEEE80211_TX_INTFL_RETRIED = BIT(15), 478 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 479 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 480 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 481 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 482 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 483 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 484 IEEE80211_TX_CTL_LDPC = BIT(22), 485 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 486 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 487 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 488 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 489 IEEE80211_TX_STATUS_EOSP = BIT(28), 490 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 491 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 492}; 493 494#define IEEE80211_TX_CTL_STBC_SHIFT 23 495 496/* 497 * This definition is used as a mask to clear all temporary flags, which are 498 * set by the tx handlers for each transmission attempt by the mac80211 stack. 499 */ 500#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 501 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 502 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 503 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 504 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 505 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 506 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 507 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 508 509/** 510 * enum mac80211_rate_control_flags - per-rate flags set by the 511 * Rate Control algorithm. 512 * 513 * These flags are set by the Rate control algorithm for each rate during tx, 514 * in the @flags member of struct ieee80211_tx_rate. 515 * 516 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 517 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 518 * This is set if the current BSS requires ERP protection. 519 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 520 * @IEEE80211_TX_RC_MCS: HT rate. 521 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 522 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 523 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 524 * Greenfield mode. 525 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 526 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 527 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 528 * (80+80 isn't supported yet) 529 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 530 * adjacent 20 MHz channels, if the current channel type is 531 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 532 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 533 */ 534enum mac80211_rate_control_flags { 535 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 536 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 537 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 538 539 /* rate index is an HT/VHT MCS instead of an index */ 540 IEEE80211_TX_RC_MCS = BIT(3), 541 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 542 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 543 IEEE80211_TX_RC_DUP_DATA = BIT(6), 544 IEEE80211_TX_RC_SHORT_GI = BIT(7), 545 IEEE80211_TX_RC_VHT_MCS = BIT(8), 546 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 547 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 548}; 549 550 551/* there are 40 bytes if you don't need the rateset to be kept */ 552#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 553 554/* if you do need the rateset, then you have less space */ 555#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 556 557/* maximum number of rate stages */ 558#define IEEE80211_TX_MAX_RATES 4 559 560/** 561 * struct ieee80211_tx_rate - rate selection/status 562 * 563 * @idx: rate index to attempt to send with 564 * @flags: rate control flags (&enum mac80211_rate_control_flags) 565 * @count: number of tries in this rate before going to the next rate 566 * 567 * A value of -1 for @idx indicates an invalid rate and, if used 568 * in an array of retry rates, that no more rates should be tried. 569 * 570 * When used for transmit status reporting, the driver should 571 * always report the rate along with the flags it used. 572 * 573 * &struct ieee80211_tx_info contains an array of these structs 574 * in the control information, and it will be filled by the rate 575 * control algorithm according to what should be sent. For example, 576 * if this array contains, in the format { <idx>, <count> } the 577 * information 578 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 579 * then this means that the frame should be transmitted 580 * up to twice at rate 3, up to twice at rate 2, and up to four 581 * times at rate 1 if it doesn't get acknowledged. Say it gets 582 * acknowledged by the peer after the fifth attempt, the status 583 * information should then contain 584 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 585 * since it was transmitted twice at rate 3, twice at rate 2 586 * and once at rate 1 after which we received an acknowledgement. 587 */ 588struct ieee80211_tx_rate { 589 s8 idx; 590 u16 count:5, 591 flags:11; 592} __packed; 593 594#define IEEE80211_MAX_TX_RETRY 31 595 596static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 597 u8 mcs, u8 nss) 598{ 599 WARN_ON(mcs & ~0xF); 600 WARN_ON(nss & ~0x7); 601 rate->idx = (nss << 4) | mcs; 602} 603 604static inline u8 605ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 606{ 607 return rate->idx & 0xF; 608} 609 610static inline u8 611ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 612{ 613 return rate->idx >> 4; 614} 615 616/** 617 * struct ieee80211_tx_info - skb transmit information 618 * 619 * This structure is placed in skb->cb for three uses: 620 * (1) mac80211 TX control - mac80211 tells the driver what to do 621 * (2) driver internal use (if applicable) 622 * (3) TX status information - driver tells mac80211 what happened 623 * 624 * @flags: transmit info flags, defined above 625 * @band: the band to transmit on (use for checking for races) 626 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 627 * @ack_frame_id: internal frame ID for TX status, used internally 628 * @control: union for control data 629 * @status: union for status data 630 * @driver_data: array of driver_data pointers 631 * @ampdu_ack_len: number of acked aggregated frames. 632 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 633 * @ampdu_len: number of aggregated frames. 634 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 635 * @ack_signal: signal strength of the ACK frame 636 */ 637struct ieee80211_tx_info { 638 /* common information */ 639 u32 flags; 640 u8 band; 641 642 u8 hw_queue; 643 644 u16 ack_frame_id; 645 646 union { 647 struct { 648 union { 649 /* rate control */ 650 struct { 651 struct ieee80211_tx_rate rates[ 652 IEEE80211_TX_MAX_RATES]; 653 s8 rts_cts_rate_idx; 654 /* 3 bytes free */ 655 }; 656 /* only needed before rate control */ 657 unsigned long jiffies; 658 }; 659 /* NB: vif can be NULL for injected frames */ 660 struct ieee80211_vif *vif; 661 struct ieee80211_key_conf *hw_key; 662 /* 8 bytes free */ 663 } control; 664 struct { 665 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 666 int ack_signal; 667 u8 ampdu_ack_len; 668 u8 ampdu_len; 669 u8 antenna; 670 /* 21 bytes free */ 671 } status; 672 struct { 673 struct ieee80211_tx_rate driver_rates[ 674 IEEE80211_TX_MAX_RATES]; 675 void *rate_driver_data[ 676 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 677 }; 678 void *driver_data[ 679 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 680 }; 681}; 682 683/** 684 * struct ieee80211_sched_scan_ies - scheduled scan IEs 685 * 686 * This structure is used to pass the appropriate IEs to be used in scheduled 687 * scans for all bands. It contains both the IEs passed from the userspace 688 * and the ones generated by mac80211. 689 * 690 * @ie: array with the IEs for each supported band 691 * @len: array with the total length of the IEs for each band 692 */ 693struct ieee80211_sched_scan_ies { 694 u8 *ie[IEEE80211_NUM_BANDS]; 695 size_t len[IEEE80211_NUM_BANDS]; 696}; 697 698static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 699{ 700 return (struct ieee80211_tx_info *)skb->cb; 701} 702 703static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 704{ 705 return (struct ieee80211_rx_status *)skb->cb; 706} 707 708/** 709 * ieee80211_tx_info_clear_status - clear TX status 710 * 711 * @info: The &struct ieee80211_tx_info to be cleared. 712 * 713 * When the driver passes an skb back to mac80211, it must report 714 * a number of things in TX status. This function clears everything 715 * in the TX status but the rate control information (it does clear 716 * the count since you need to fill that in anyway). 717 * 718 * NOTE: You can only use this function if you do NOT use 719 * info->driver_data! Use info->rate_driver_data 720 * instead if you need only the less space that allows. 721 */ 722static inline void 723ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 724{ 725 int i; 726 727 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 728 offsetof(struct ieee80211_tx_info, control.rates)); 729 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 730 offsetof(struct ieee80211_tx_info, driver_rates)); 731 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 732 /* clear the rate counts */ 733 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 734 info->status.rates[i].count = 0; 735 736 BUILD_BUG_ON( 737 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 738 memset(&info->status.ampdu_ack_len, 0, 739 sizeof(struct ieee80211_tx_info) - 740 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 741} 742 743 744/** 745 * enum mac80211_rx_flags - receive flags 746 * 747 * These flags are used with the @flag member of &struct ieee80211_rx_status. 748 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 749 * Use together with %RX_FLAG_MMIC_STRIPPED. 750 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 751 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 752 * verification has been done by the hardware. 753 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 754 * If this flag is set, the stack cannot do any replay detection 755 * hence the driver or hardware will have to do that. 756 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 757 * the frame. 758 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 759 * the frame. 760 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 761 * field) is valid and contains the time the first symbol of the MPDU 762 * was received. This is useful in monitor mode and for proper IBSS 763 * merging. 764 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 765 * field) is valid and contains the time the last symbol of the MPDU 766 * (including FCS) was received. 767 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 768 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 769 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 770 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 771 * @RX_FLAG_80MHZ: 80 MHz was used 772 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 773 * @RX_FLAG_160MHZ: 160 MHz was used 774 * @RX_FLAG_SHORT_GI: Short guard interval was used 775 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 776 * Valid only for data frames (mainly A-MPDU) 777 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 778 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 779 * to hw.radiotap_mcs_details to advertise that fact 780 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 781 * number (@ampdu_reference) must be populated and be a distinct number for 782 * each A-MPDU 783 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 784 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 785 * monitoring purposes only 786 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 787 * subframes of a single A-MPDU 788 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 789 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 790 * on this subframe 791 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 792 * is stored in the @ampdu_delimiter_crc field) 793 */ 794enum mac80211_rx_flags { 795 RX_FLAG_MMIC_ERROR = BIT(0), 796 RX_FLAG_DECRYPTED = BIT(1), 797 RX_FLAG_MMIC_STRIPPED = BIT(3), 798 RX_FLAG_IV_STRIPPED = BIT(4), 799 RX_FLAG_FAILED_FCS_CRC = BIT(5), 800 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 801 RX_FLAG_MACTIME_START = BIT(7), 802 RX_FLAG_SHORTPRE = BIT(8), 803 RX_FLAG_HT = BIT(9), 804 RX_FLAG_40MHZ = BIT(10), 805 RX_FLAG_SHORT_GI = BIT(11), 806 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 807 RX_FLAG_HT_GF = BIT(13), 808 RX_FLAG_AMPDU_DETAILS = BIT(14), 809 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 810 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 811 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 812 RX_FLAG_AMPDU_IS_LAST = BIT(18), 813 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 814 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 815 RX_FLAG_MACTIME_END = BIT(21), 816 RX_FLAG_VHT = BIT(22), 817 RX_FLAG_80MHZ = BIT(23), 818 RX_FLAG_80P80MHZ = BIT(24), 819 RX_FLAG_160MHZ = BIT(25), 820}; 821 822/** 823 * struct ieee80211_rx_status - receive status 824 * 825 * The low-level driver should provide this information (the subset 826 * supported by hardware) to the 802.11 code with each received 827 * frame, in the skb's control buffer (cb). 828 * 829 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 830 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 831 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 832 * it but can store it and pass it back to the driver for synchronisation 833 * @band: the active band when this frame was received 834 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 835 * @signal: signal strength when receiving this frame, either in dBm, in dB or 836 * unspecified depending on the hardware capabilities flags 837 * @IEEE80211_HW_SIGNAL_* 838 * @antenna: antenna used 839 * @rate_idx: index of data rate into band's supported rates or MCS index if 840 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 841 * @vht_nss: number of streams (VHT only) 842 * @flag: %RX_FLAG_* 843 * @rx_flags: internal RX flags for mac80211 844 * @ampdu_reference: A-MPDU reference number, must be a different value for 845 * each A-MPDU but the same for each subframe within one A-MPDU 846 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 847 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 848 * @vendor_radiotap_len: radiotap vendor namespace length 849 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 850 * that the actual data must be at the start of the SKB data 851 * already. 852 * @vendor_radiotap_oui: radiotap vendor namespace OUI 853 * @vendor_radiotap_subns: radiotap vendor sub namespace 854 */ 855struct ieee80211_rx_status { 856 u64 mactime; 857 u32 device_timestamp; 858 u32 ampdu_reference; 859 u32 flag; 860 u32 vendor_radiotap_bitmap; 861 u16 vendor_radiotap_len; 862 u16 freq; 863 u8 rate_idx; 864 u8 vht_nss; 865 u8 rx_flags; 866 u8 band; 867 u8 antenna; 868 s8 signal; 869 u8 ampdu_delimiter_crc; 870 u8 vendor_radiotap_align; 871 u8 vendor_radiotap_oui[3]; 872 u8 vendor_radiotap_subns; 873}; 874 875/** 876 * enum ieee80211_conf_flags - configuration flags 877 * 878 * Flags to define PHY configuration options 879 * 880 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 881 * to determine for example whether to calculate timestamps for packets 882 * or not, do not use instead of filter flags! 883 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 884 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 885 * meaning that the hardware still wakes up for beacons, is able to 886 * transmit frames and receive the possible acknowledgment frames. 887 * Not to be confused with hardware specific wakeup/sleep states, 888 * driver is responsible for that. See the section "Powersave support" 889 * for more. 890 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 891 * the driver should be prepared to handle configuration requests but 892 * may turn the device off as much as possible. Typically, this flag will 893 * be set when an interface is set UP but not associated or scanning, but 894 * it can also be unset in that case when monitor interfaces are active. 895 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 896 * operating channel. 897 */ 898enum ieee80211_conf_flags { 899 IEEE80211_CONF_MONITOR = (1<<0), 900 IEEE80211_CONF_PS = (1<<1), 901 IEEE80211_CONF_IDLE = (1<<2), 902 IEEE80211_CONF_OFFCHANNEL = (1<<3), 903}; 904 905 906/** 907 * enum ieee80211_conf_changed - denotes which configuration changed 908 * 909 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 910 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 911 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 912 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 913 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 914 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 915 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 916 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 917 * Note that this is only valid if channel contexts are not used, 918 * otherwise each channel context has the number of chains listed. 919 */ 920enum ieee80211_conf_changed { 921 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 922 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 923 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 924 IEEE80211_CONF_CHANGE_PS = BIT(4), 925 IEEE80211_CONF_CHANGE_POWER = BIT(5), 926 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 927 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 928 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 929}; 930 931/** 932 * enum ieee80211_smps_mode - spatial multiplexing power save mode 933 * 934 * @IEEE80211_SMPS_AUTOMATIC: automatic 935 * @IEEE80211_SMPS_OFF: off 936 * @IEEE80211_SMPS_STATIC: static 937 * @IEEE80211_SMPS_DYNAMIC: dynamic 938 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 939 */ 940enum ieee80211_smps_mode { 941 IEEE80211_SMPS_AUTOMATIC, 942 IEEE80211_SMPS_OFF, 943 IEEE80211_SMPS_STATIC, 944 IEEE80211_SMPS_DYNAMIC, 945 946 /* keep last */ 947 IEEE80211_SMPS_NUM_MODES, 948}; 949 950/** 951 * struct ieee80211_conf - configuration of the device 952 * 953 * This struct indicates how the driver shall configure the hardware. 954 * 955 * @flags: configuration flags defined above 956 * 957 * @listen_interval: listen interval in units of beacon interval 958 * @max_sleep_period: the maximum number of beacon intervals to sleep for 959 * before checking the beacon for a TIM bit (managed mode only); this 960 * value will be only achievable between DTIM frames, the hardware 961 * needs to check for the multicast traffic bit in DTIM beacons. 962 * This variable is valid only when the CONF_PS flag is set. 963 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 964 * in power saving. Power saving will not be enabled until a beacon 965 * has been received and the DTIM period is known. 966 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 967 * powersave documentation below. This variable is valid only when 968 * the CONF_PS flag is set. 969 * 970 * @power_level: requested transmit power (in dBm), backward compatibility 971 * value only that is set to the minimum of all interfaces 972 * 973 * @channel: the channel to tune to 974 * @channel_type: the channel (HT) type 975 * @radar_enabled: whether radar detection is enabled 976 * 977 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 978 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 979 * but actually means the number of transmissions not the number of retries 980 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 981 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 982 * number of transmissions not the number of retries 983 * 984 * @smps_mode: spatial multiplexing powersave mode; note that 985 * %IEEE80211_SMPS_STATIC is used when the device is not 986 * configured for an HT channel. 987 * Note that this is only valid if channel contexts are not used, 988 * otherwise each channel context has the number of chains listed. 989 */ 990struct ieee80211_conf { 991 u32 flags; 992 int power_level, dynamic_ps_timeout; 993 int max_sleep_period; 994 995 u16 listen_interval; 996 u8 ps_dtim_period; 997 998 u8 long_frame_max_tx_count, short_frame_max_tx_count; 999 1000 struct ieee80211_channel *channel; 1001 enum nl80211_channel_type channel_type; 1002 bool radar_enabled; 1003 enum ieee80211_smps_mode smps_mode; 1004}; 1005 1006/** 1007 * struct ieee80211_channel_switch - holds the channel switch data 1008 * 1009 * The information provided in this structure is required for channel switch 1010 * operation. 1011 * 1012 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1013 * Function (TSF) timer when the frame containing the channel switch 1014 * announcement was received. This is simply the rx.mactime parameter 1015 * the driver passed into mac80211. 1016 * @block_tx: Indicates whether transmission must be blocked before the 1017 * scheduled channel switch, as indicated by the AP. 1018 * @channel: the new channel to switch to 1019 * @count: the number of TBTT's until the channel switch event 1020 */ 1021struct ieee80211_channel_switch { 1022 u64 timestamp; 1023 bool block_tx; 1024 struct ieee80211_channel *channel; 1025 u8 count; 1026}; 1027 1028/** 1029 * enum ieee80211_vif_flags - virtual interface flags 1030 * 1031 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1032 * on this virtual interface to avoid unnecessary CPU wakeups 1033 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1034 * monitoring on this virtual interface -- i.e. it can monitor 1035 * connection quality related parameters, such as the RSSI level and 1036 * provide notifications if configured trigger levels are reached. 1037 */ 1038enum ieee80211_vif_flags { 1039 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1040 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1041}; 1042 1043/** 1044 * struct ieee80211_vif - per-interface data 1045 * 1046 * Data in this structure is continually present for driver 1047 * use during the life of a virtual interface. 1048 * 1049 * @type: type of this virtual interface 1050 * @bss_conf: BSS configuration for this interface, either our own 1051 * or the BSS we're associated to 1052 * @addr: address of this interface 1053 * @p2p: indicates whether this AP or STA interface is a p2p 1054 * interface, i.e. a GO or p2p-sta respectively 1055 * @driver_flags: flags/capabilities the driver has for this interface, 1056 * these need to be set (or cleared) when the interface is added 1057 * or, if supported by the driver, the interface type is changed 1058 * at runtime, mac80211 will never touch this field 1059 * @hw_queue: hardware queue for each AC 1060 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1061 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1062 * when it is not assigned. This pointer is RCU-protected due to the TX 1063 * path needing to access it; even though the netdev carrier will always 1064 * be off when it is %NULL there can still be races and packets could be 1065 * processed after it switches back to %NULL. 1066 * @drv_priv: data area for driver use, will always be aligned to 1067 * sizeof(void *). 1068 */ 1069struct ieee80211_vif { 1070 enum nl80211_iftype type; 1071 struct ieee80211_bss_conf bss_conf; 1072 u8 addr[ETH_ALEN]; 1073 bool p2p; 1074 1075 u8 cab_queue; 1076 u8 hw_queue[IEEE80211_NUM_ACS]; 1077 1078 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1079 1080 u32 driver_flags; 1081 1082 /* must be last */ 1083 u8 drv_priv[0] __aligned(sizeof(void *)); 1084}; 1085 1086static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1087{ 1088#ifdef CONFIG_MAC80211_MESH 1089 return vif->type == NL80211_IFTYPE_MESH_POINT; 1090#endif 1091 return false; 1092} 1093 1094/** 1095 * enum ieee80211_key_flags - key flags 1096 * 1097 * These flags are used for communication about keys between the driver 1098 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1099 * 1100 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 1101 * that the STA this key will be used with could be using QoS. 1102 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1103 * driver to indicate that it requires IV generation for this 1104 * particular key. 1105 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1106 * the driver for a TKIP key if it requires Michael MIC 1107 * generation in software. 1108 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1109 * that the key is pairwise rather then a shared key. 1110 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1111 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1112 * be done in software. 1113 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1114 * if space should be prepared for the IV, but the IV 1115 * itself should not be generated. Do not set together with 1116 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1117 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1118 * management frames. The flag can help drivers that have a hardware 1119 * crypto implementation that doesn't deal with management frames 1120 * properly by allowing them to not upload the keys to hardware and 1121 * fall back to software crypto. Note that this flag deals only with 1122 * RX, if your crypto engine can't deal with TX you can also set the 1123 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1124 */ 1125enum ieee80211_key_flags { 1126 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 1127 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1128 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1129 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1130 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1131 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1132 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1133}; 1134 1135/** 1136 * struct ieee80211_key_conf - key information 1137 * 1138 * This key information is given by mac80211 to the driver by 1139 * the set_key() callback in &struct ieee80211_ops. 1140 * 1141 * @hw_key_idx: To be set by the driver, this is the key index the driver 1142 * wants to be given when a frame is transmitted and needs to be 1143 * encrypted in hardware. 1144 * @cipher: The key's cipher suite selector. 1145 * @flags: key flags, see &enum ieee80211_key_flags. 1146 * @keyidx: the key index (0-3) 1147 * @keylen: key material length 1148 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1149 * data block: 1150 * - Temporal Encryption Key (128 bits) 1151 * - Temporal Authenticator Tx MIC Key (64 bits) 1152 * - Temporal Authenticator Rx MIC Key (64 bits) 1153 * @icv_len: The ICV length for this key type 1154 * @iv_len: The IV length for this key type 1155 */ 1156struct ieee80211_key_conf { 1157 u32 cipher; 1158 u8 icv_len; 1159 u8 iv_len; 1160 u8 hw_key_idx; 1161 u8 flags; 1162 s8 keyidx; 1163 u8 keylen; 1164 u8 key[0]; 1165}; 1166 1167/** 1168 * enum set_key_cmd - key command 1169 * 1170 * Used with the set_key() callback in &struct ieee80211_ops, this 1171 * indicates whether a key is being removed or added. 1172 * 1173 * @SET_KEY: a key is set 1174 * @DISABLE_KEY: a key must be disabled 1175 */ 1176enum set_key_cmd { 1177 SET_KEY, DISABLE_KEY, 1178}; 1179 1180/** 1181 * enum ieee80211_sta_state - station state 1182 * 1183 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1184 * this is a special state for add/remove transitions 1185 * @IEEE80211_STA_NONE: station exists without special state 1186 * @IEEE80211_STA_AUTH: station is authenticated 1187 * @IEEE80211_STA_ASSOC: station is associated 1188 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1189 */ 1190enum ieee80211_sta_state { 1191 /* NOTE: These need to be ordered correctly! */ 1192 IEEE80211_STA_NOTEXIST, 1193 IEEE80211_STA_NONE, 1194 IEEE80211_STA_AUTH, 1195 IEEE80211_STA_ASSOC, 1196 IEEE80211_STA_AUTHORIZED, 1197}; 1198 1199/** 1200 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1201 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1202 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1203 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1204 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1205 * (including 80+80 MHz) 1206 * 1207 * Implementation note: 20 must be zero to be initialized 1208 * correctly, the values must be sorted. 1209 */ 1210enum ieee80211_sta_rx_bandwidth { 1211 IEEE80211_STA_RX_BW_20 = 0, 1212 IEEE80211_STA_RX_BW_40, 1213 IEEE80211_STA_RX_BW_80, 1214 IEEE80211_STA_RX_BW_160, 1215}; 1216 1217/** 1218 * struct ieee80211_sta - station table entry 1219 * 1220 * A station table entry represents a station we are possibly 1221 * communicating with. Since stations are RCU-managed in 1222 * mac80211, any ieee80211_sta pointer you get access to must 1223 * either be protected by rcu_read_lock() explicitly or implicitly, 1224 * or you must take good care to not use such a pointer after a 1225 * call to your sta_remove callback that removed it. 1226 * 1227 * @addr: MAC address 1228 * @aid: AID we assigned to the station if we're an AP 1229 * @supp_rates: Bitmap of supported rates (per band) 1230 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1231 * @vht_cap: VHT capabilities of this STA; Not restricting any capabilities 1232 * of remote STA. Taking as is. 1233 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1234 * @drv_priv: data area for driver use, will always be aligned to 1235 * sizeof(void *), size is determined in hw information. 1236 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1237 * if wme is supported. 1238 * @max_sp: max Service Period. Only valid if wme is supported. 1239 * @bandwidth: current bandwidth the station can receive with 1240 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1241 * station can receive at the moment, changed by operating mode 1242 * notifications and capabilities. The value is only valid after 1243 * the station moves to associated state. 1244 */ 1245struct ieee80211_sta { 1246 u32 supp_rates[IEEE80211_NUM_BANDS]; 1247 u8 addr[ETH_ALEN]; 1248 u16 aid; 1249 struct ieee80211_sta_ht_cap ht_cap; 1250 struct ieee80211_sta_vht_cap vht_cap; 1251 bool wme; 1252 u8 uapsd_queues; 1253 u8 max_sp; 1254 u8 rx_nss; 1255 enum ieee80211_sta_rx_bandwidth bandwidth; 1256 1257 /* must be last */ 1258 u8 drv_priv[0] __aligned(sizeof(void *)); 1259}; 1260 1261/** 1262 * enum sta_notify_cmd - sta notify command 1263 * 1264 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1265 * indicates if an associated station made a power state transition. 1266 * 1267 * @STA_NOTIFY_SLEEP: a station is now sleeping 1268 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1269 */ 1270enum sta_notify_cmd { 1271 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1272}; 1273 1274/** 1275 * struct ieee80211_tx_control - TX control data 1276 * 1277 * @sta: station table entry, this sta pointer may be NULL and 1278 * it is not allowed to copy the pointer, due to RCU. 1279 */ 1280struct ieee80211_tx_control { 1281 struct ieee80211_sta *sta; 1282}; 1283 1284/** 1285 * enum ieee80211_hw_flags - hardware flags 1286 * 1287 * These flags are used to indicate hardware capabilities to 1288 * the stack. Generally, flags here should have their meaning 1289 * done in a way that the simplest hardware doesn't need setting 1290 * any particular flags. There are some exceptions to this rule, 1291 * however, so you are advised to review these flags carefully. 1292 * 1293 * @IEEE80211_HW_HAS_RATE_CONTROL: 1294 * The hardware or firmware includes rate control, and cannot be 1295 * controlled by the stack. As such, no rate control algorithm 1296 * should be instantiated, and the TX rate reported to userspace 1297 * will be taken from the TX status instead of the rate control 1298 * algorithm. 1299 * Note that this requires that the driver implement a number of 1300 * callbacks so it has the correct information, it needs to have 1301 * the @set_rts_threshold callback and must look at the BSS config 1302 * @use_cts_prot for G/N protection, @use_short_slot for slot 1303 * timing in 2.4 GHz and @use_short_preamble for preambles for 1304 * CCK frames. 1305 * 1306 * @IEEE80211_HW_RX_INCLUDES_FCS: 1307 * Indicates that received frames passed to the stack include 1308 * the FCS at the end. 1309 * 1310 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1311 * Some wireless LAN chipsets buffer broadcast/multicast frames 1312 * for power saving stations in the hardware/firmware and others 1313 * rely on the host system for such buffering. This option is used 1314 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1315 * multicast frames when there are power saving stations so that 1316 * the driver can fetch them with ieee80211_get_buffered_bc(). 1317 * 1318 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1319 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1320 * 1321 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1322 * Hardware is not capable of receiving frames with short preamble on 1323 * the 2.4 GHz band. 1324 * 1325 * @IEEE80211_HW_SIGNAL_UNSPEC: 1326 * Hardware can provide signal values but we don't know its units. We 1327 * expect values between 0 and @max_signal. 1328 * If possible please provide dB or dBm instead. 1329 * 1330 * @IEEE80211_HW_SIGNAL_DBM: 1331 * Hardware gives signal values in dBm, decibel difference from 1332 * one milliwatt. This is the preferred method since it is standardized 1333 * between different devices. @max_signal does not need to be set. 1334 * 1335 * @IEEE80211_HW_SPECTRUM_MGMT: 1336 * Hardware supports spectrum management defined in 802.11h 1337 * Measurement, Channel Switch, Quieting, TPC 1338 * 1339 * @IEEE80211_HW_AMPDU_AGGREGATION: 1340 * Hardware supports 11n A-MPDU aggregation. 1341 * 1342 * @IEEE80211_HW_SUPPORTS_PS: 1343 * Hardware has power save support (i.e. can go to sleep). 1344 * 1345 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1346 * Hardware requires nullfunc frame handling in stack, implies 1347 * stack support for dynamic PS. 1348 * 1349 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1350 * Hardware has support for dynamic PS. 1351 * 1352 * @IEEE80211_HW_MFP_CAPABLE: 1353 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1354 * 1355 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1356 * Hardware supports static spatial multiplexing powersave, 1357 * ie. can turn off all but one chain even on HT connections 1358 * that should be using more chains. 1359 * 1360 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1361 * Hardware supports dynamic spatial multiplexing powersave, 1362 * ie. can turn off all but one chain and then wake the rest 1363 * up as required after, for example, rts/cts handshake. 1364 * 1365 * @IEEE80211_HW_SUPPORTS_UAPSD: 1366 * Hardware supports Unscheduled Automatic Power Save Delivery 1367 * (U-APSD) in managed mode. The mode is configured with 1368 * conf_tx() operation. 1369 * 1370 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1371 * Hardware can provide ack status reports of Tx frames to 1372 * the stack. 1373 * 1374 * @IEEE80211_HW_CONNECTION_MONITOR: 1375 * The hardware performs its own connection monitoring, including 1376 * periodic keep-alives to the AP and probing the AP on beacon loss. 1377 * When this flag is set, signaling beacon-loss will cause an immediate 1378 * change to disassociated state. 1379 * 1380 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1381 * This device needs to get data from beacon before association (i.e. 1382 * dtim_period). 1383 * 1384 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1385 * per-station GTKs as used by IBSS RSN or during fast transition. If 1386 * the device doesn't support per-station GTKs, but can be asked not 1387 * to decrypt group addressed frames, then IBSS RSN support is still 1388 * possible but software crypto will be used. Advertise the wiphy flag 1389 * only in that case. 1390 * 1391 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1392 * autonomously manages the PS status of connected stations. When 1393 * this flag is set mac80211 will not trigger PS mode for connected 1394 * stations based on the PM bit of incoming frames. 1395 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1396 * the PS mode of connected stations. 1397 * 1398 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1399 * setup strictly in HW. mac80211 should not attempt to do this in 1400 * software. 1401 * 1402 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1403 * a virtual monitor interface when monitor interfaces are the only 1404 * active interfaces. 1405 * 1406 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1407 * queue mapping in order to use different queues (not just one per AC) 1408 * for different virtual interfaces. See the doc section on HW queue 1409 * control for more details. 1410 * 1411 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1412 * P2P Interface. This will be honoured even if more than one interface 1413 * is supported. 1414 * 1415 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1416 * only, to allow getting TBTT of a DTIM beacon. 1417 */ 1418enum ieee80211_hw_flags { 1419 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1420 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1421 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1422 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1423 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1424 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1425 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1426 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1427 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1428 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1429 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1430 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1431 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1432 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1433 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1434 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1435 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1436 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1437 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1438 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1439 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1440 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1441 IEEE80211_HW_AP_LINK_PS = 1<<22, 1442 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1443 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1444 IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, 1445}; 1446 1447/** 1448 * struct ieee80211_hw - hardware information and state 1449 * 1450 * This structure contains the configuration and hardware 1451 * information for an 802.11 PHY. 1452 * 1453 * @wiphy: This points to the &struct wiphy allocated for this 1454 * 802.11 PHY. You must fill in the @perm_addr and @dev 1455 * members of this structure using SET_IEEE80211_DEV() 1456 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1457 * bands (with channels, bitrates) are registered here. 1458 * 1459 * @conf: &struct ieee80211_conf, device configuration, don't use. 1460 * 1461 * @priv: pointer to private area that was allocated for driver use 1462 * along with this structure. 1463 * 1464 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1465 * 1466 * @extra_tx_headroom: headroom to reserve in each transmit skb 1467 * for use by the driver (e.g. for transmit headers.) 1468 * 1469 * @channel_change_time: time (in microseconds) it takes to change channels. 1470 * 1471 * @max_signal: Maximum value for signal (rssi) in RX information, used 1472 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1473 * 1474 * @max_listen_interval: max listen interval in units of beacon interval 1475 * that HW supports 1476 * 1477 * @queues: number of available hardware transmit queues for 1478 * data packets. WMM/QoS requires at least four, these 1479 * queues need to have configurable access parameters. 1480 * 1481 * @rate_control_algorithm: rate control algorithm for this hardware. 1482 * If unset (NULL), the default algorithm will be used. Must be 1483 * set before calling ieee80211_register_hw(). 1484 * 1485 * @vif_data_size: size (in bytes) of the drv_priv data area 1486 * within &struct ieee80211_vif. 1487 * @sta_data_size: size (in bytes) of the drv_priv data area 1488 * within &struct ieee80211_sta. 1489 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1490 * within &struct ieee80211_chanctx_conf. 1491 * 1492 * @max_rates: maximum number of alternate rate retry stages the hw 1493 * can handle. 1494 * @max_report_rates: maximum number of alternate rate retry stages 1495 * the hw can report back. 1496 * @max_rate_tries: maximum number of tries for each stage 1497 * 1498 * @napi_weight: weight used for NAPI polling. You must specify an 1499 * appropriate value here if a napi_poll operation is provided 1500 * by your driver. 1501 * 1502 * @max_rx_aggregation_subframes: maximum buffer size (number of 1503 * sub-frames) to be used for A-MPDU block ack receiver 1504 * aggregation. 1505 * This is only relevant if the device has restrictions on the 1506 * number of subframes, if it relies on mac80211 to do reordering 1507 * it shouldn't be set. 1508 * 1509 * @max_tx_aggregation_subframes: maximum number of subframes in an 1510 * aggregate an HT driver will transmit, used by the peer as a 1511 * hint to size its reorder buffer. 1512 * 1513 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1514 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1515 * 1516 * @radiotap_mcs_details: lists which MCS information can the HW 1517 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1518 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1519 * adding _BW is supported today. 1520 * 1521 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1522 * the default is _GI | _BANDWIDTH. 1523 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1524 * 1525 * @netdev_features: netdev features to be set in each netdev created 1526 * from this HW. Note only HW checksum features are currently 1527 * compatible with mac80211. Other feature bits will be rejected. 1528 */ 1529struct ieee80211_hw { 1530 struct ieee80211_conf conf; 1531 struct wiphy *wiphy; 1532 const char *rate_control_algorithm; 1533 void *priv; 1534 u32 flags; 1535 unsigned int extra_tx_headroom; 1536 int channel_change_time; 1537 int vif_data_size; 1538 int sta_data_size; 1539 int chanctx_data_size; 1540 int napi_weight; 1541 u16 queues; 1542 u16 max_listen_interval; 1543 s8 max_signal; 1544 u8 max_rates; 1545 u8 max_report_rates; 1546 u8 max_rate_tries; 1547 u8 max_rx_aggregation_subframes; 1548 u8 max_tx_aggregation_subframes; 1549 u8 offchannel_tx_hw_queue; 1550 u8 radiotap_mcs_details; 1551 u16 radiotap_vht_details; 1552 netdev_features_t netdev_features; 1553}; 1554 1555/** 1556 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1557 * 1558 * @wiphy: the &struct wiphy which we want to query 1559 * 1560 * mac80211 drivers can use this to get to their respective 1561 * &struct ieee80211_hw. Drivers wishing to get to their own private 1562 * structure can then access it via hw->priv. Note that mac802111 drivers should 1563 * not use wiphy_priv() to try to get their private driver structure as this 1564 * is already used internally by mac80211. 1565 * 1566 * Return: The mac80211 driver hw struct of @wiphy. 1567 */ 1568struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1569 1570/** 1571 * SET_IEEE80211_DEV - set device for 802.11 hardware 1572 * 1573 * @hw: the &struct ieee80211_hw to set the device for 1574 * @dev: the &struct device of this 802.11 device 1575 */ 1576static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1577{ 1578 set_wiphy_dev(hw->wiphy, dev); 1579} 1580 1581/** 1582 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1583 * 1584 * @hw: the &struct ieee80211_hw to set the MAC address for 1585 * @addr: the address to set 1586 */ 1587static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1588{ 1589 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1590} 1591 1592static inline struct ieee80211_rate * 1593ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1594 const struct ieee80211_tx_info *c) 1595{ 1596 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1597 return NULL; 1598 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1599} 1600 1601static inline struct ieee80211_rate * 1602ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1603 const struct ieee80211_tx_info *c) 1604{ 1605 if (c->control.rts_cts_rate_idx < 0) 1606 return NULL; 1607 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1608} 1609 1610static inline struct ieee80211_rate * 1611ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1612 const struct ieee80211_tx_info *c, int idx) 1613{ 1614 if (c->control.rates[idx + 1].idx < 0) 1615 return NULL; 1616 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1617} 1618 1619/** 1620 * ieee80211_free_txskb - free TX skb 1621 * @hw: the hardware 1622 * @skb: the skb 1623 * 1624 * Free a transmit skb. Use this funtion when some failure 1625 * to transmit happened and thus status cannot be reported. 1626 */ 1627void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1628 1629/** 1630 * DOC: Hardware crypto acceleration 1631 * 1632 * mac80211 is capable of taking advantage of many hardware 1633 * acceleration designs for encryption and decryption operations. 1634 * 1635 * The set_key() callback in the &struct ieee80211_ops for a given 1636 * device is called to enable hardware acceleration of encryption and 1637 * decryption. The callback takes a @sta parameter that will be NULL 1638 * for default keys or keys used for transmission only, or point to 1639 * the station information for the peer for individual keys. 1640 * Multiple transmission keys with the same key index may be used when 1641 * VLANs are configured for an access point. 1642 * 1643 * When transmitting, the TX control data will use the @hw_key_idx 1644 * selected by the driver by modifying the &struct ieee80211_key_conf 1645 * pointed to by the @key parameter to the set_key() function. 1646 * 1647 * The set_key() call for the %SET_KEY command should return 0 if 1648 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1649 * added; if you return 0 then hw_key_idx must be assigned to the 1650 * hardware key index, you are free to use the full u8 range. 1651 * 1652 * When the cmd is %DISABLE_KEY then it must succeed. 1653 * 1654 * Note that it is permissible to not decrypt a frame even if a key 1655 * for it has been uploaded to hardware, the stack will not make any 1656 * decision based on whether a key has been uploaded or not but rather 1657 * based on the receive flags. 1658 * 1659 * The &struct ieee80211_key_conf structure pointed to by the @key 1660 * parameter is guaranteed to be valid until another call to set_key() 1661 * removes it, but it can only be used as a cookie to differentiate 1662 * keys. 1663 * 1664 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1665 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1666 * handler. 1667 * The update_tkip_key() call updates the driver with the new phase 1 key. 1668 * This happens every time the iv16 wraps around (every 65536 packets). The 1669 * set_key() call will happen only once for each key (unless the AP did 1670 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1671 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1672 * handler is software decryption with wrap around of iv16. 1673 * 1674 * The set_default_unicast_key() call updates the default WEP key index 1675 * configured to the hardware for WEP encryption type. This is required 1676 * for devices that support offload of data packets (e.g. ARP responses). 1677 */ 1678 1679/** 1680 * DOC: Powersave support 1681 * 1682 * mac80211 has support for various powersave implementations. 1683 * 1684 * First, it can support hardware that handles all powersaving by itself, 1685 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1686 * flag. In that case, it will be told about the desired powersave mode 1687 * with the %IEEE80211_CONF_PS flag depending on the association status. 1688 * The hardware must take care of sending nullfunc frames when necessary, 1689 * i.e. when entering and leaving powersave mode. The hardware is required 1690 * to look at the AID in beacons and signal to the AP that it woke up when 1691 * it finds traffic directed to it. 1692 * 1693 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1694 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1695 * with hardware wakeup and sleep states. Driver is responsible for waking 1696 * up the hardware before issuing commands to the hardware and putting it 1697 * back to sleep at appropriate times. 1698 * 1699 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1700 * buffered multicast/broadcast frames after the beacon. Also it must be 1701 * possible to send frames and receive the acknowledment frame. 1702 * 1703 * Other hardware designs cannot send nullfunc frames by themselves and also 1704 * need software support for parsing the TIM bitmap. This is also supported 1705 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1706 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1707 * required to pass up beacons. The hardware is still required to handle 1708 * waking up for multicast traffic; if it cannot the driver must handle that 1709 * as best as it can, mac80211 is too slow to do that. 1710 * 1711 * Dynamic powersave is an extension to normal powersave in which the 1712 * hardware stays awake for a user-specified period of time after sending a 1713 * frame so that reply frames need not be buffered and therefore delayed to 1714 * the next wakeup. It's compromise of getting good enough latency when 1715 * there's data traffic and still saving significantly power in idle 1716 * periods. 1717 * 1718 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1719 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1720 * flag and mac80211 will handle everything automatically. Additionally, 1721 * hardware having support for the dynamic PS feature may set the 1722 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1723 * dynamic PS mode itself. The driver needs to look at the 1724 * @dynamic_ps_timeout hardware configuration value and use it that value 1725 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1726 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1727 * enabled whenever user has enabled powersave. 1728 * 1729 * Driver informs U-APSD client support by enabling 1730 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1731 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1732 * Nullfunc frames and stay awake until the service period has ended. To 1733 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1734 * from that AC are transmitted with powersave enabled. 1735 * 1736 * Note: U-APSD client mode is not yet supported with 1737 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1738 */ 1739 1740/** 1741 * DOC: Beacon filter support 1742 * 1743 * Some hardware have beacon filter support to reduce host cpu wakeups 1744 * which will reduce system power consumption. It usually works so that 1745 * the firmware creates a checksum of the beacon but omits all constantly 1746 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1747 * beacon is forwarded to the host, otherwise it will be just dropped. That 1748 * way the host will only receive beacons where some relevant information 1749 * (for example ERP protection or WMM settings) have changed. 1750 * 1751 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1752 * interface capability. The driver needs to enable beacon filter support 1753 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1754 * power save is enabled, the stack will not check for beacon loss and the 1755 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1756 * 1757 * The time (or number of beacons missed) until the firmware notifies the 1758 * driver of a beacon loss event (which in turn causes the driver to call 1759 * ieee80211_beacon_loss()) should be configurable and will be controlled 1760 * by mac80211 and the roaming algorithm in the future. 1761 * 1762 * Since there may be constantly changing information elements that nothing 1763 * in the software stack cares about, we will, in the future, have mac80211 1764 * tell the driver which information elements are interesting in the sense 1765 * that we want to see changes in them. This will include 1766 * - a list of information element IDs 1767 * - a list of OUIs for the vendor information element 1768 * 1769 * Ideally, the hardware would filter out any beacons without changes in the 1770 * requested elements, but if it cannot support that it may, at the expense 1771 * of some efficiency, filter out only a subset. For example, if the device 1772 * doesn't support checking for OUIs it should pass up all changes in all 1773 * vendor information elements. 1774 * 1775 * Note that change, for the sake of simplification, also includes information 1776 * elements appearing or disappearing from the beacon. 1777 * 1778 * Some hardware supports an "ignore list" instead, just make sure nothing 1779 * that was requested is on the ignore list, and include commonly changing 1780 * information element IDs in the ignore list, for example 11 (BSS load) and 1781 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1782 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1783 * it could also include some currently unused IDs. 1784 * 1785 * 1786 * In addition to these capabilities, hardware should support notifying the 1787 * host of changes in the beacon RSSI. This is relevant to implement roaming 1788 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1789 * the received data packets). This can consist in notifying the host when 1790 * the RSSI changes significantly or when it drops below or rises above 1791 * configurable thresholds. In the future these thresholds will also be 1792 * configured by mac80211 (which gets them from userspace) to implement 1793 * them as the roaming algorithm requires. 1794 * 1795 * If the hardware cannot implement this, the driver should ask it to 1796 * periodically pass beacon frames to the host so that software can do the 1797 * signal strength threshold checking. 1798 */ 1799 1800/** 1801 * DOC: Spatial multiplexing power save 1802 * 1803 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1804 * power in an 802.11n implementation. For details on the mechanism 1805 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1806 * "11.2.3 SM power save". 1807 * 1808 * The mac80211 implementation is capable of sending action frames 1809 * to update the AP about the station's SMPS mode, and will instruct 1810 * the driver to enter the specific mode. It will also announce the 1811 * requested SMPS mode during the association handshake. Hardware 1812 * support for this feature is required, and can be indicated by 1813 * hardware flags. 1814 * 1815 * The default mode will be "automatic", which nl80211/cfg80211 1816 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1817 * turned off otherwise. 1818 * 1819 * To support this feature, the driver must set the appropriate 1820 * hardware support flags, and handle the SMPS flag to the config() 1821 * operation. It will then with this mechanism be instructed to 1822 * enter the requested SMPS mode while associated to an HT AP. 1823 */ 1824 1825/** 1826 * DOC: Frame filtering 1827 * 1828 * mac80211 requires to see many management frames for proper 1829 * operation, and users may want to see many more frames when 1830 * in monitor mode. However, for best CPU usage and power consumption, 1831 * having as few frames as possible percolate through the stack is 1832 * desirable. Hence, the hardware should filter as much as possible. 1833 * 1834 * To achieve this, mac80211 uses filter flags (see below) to tell 1835 * the driver's configure_filter() function which frames should be 1836 * passed to mac80211 and which should be filtered out. 1837 * 1838 * Before configure_filter() is invoked, the prepare_multicast() 1839 * callback is invoked with the parameters @mc_count and @mc_list 1840 * for the combined multicast address list of all virtual interfaces. 1841 * It's use is optional, and it returns a u64 that is passed to 1842 * configure_filter(). Additionally, configure_filter() has the 1843 * arguments @changed_flags telling which flags were changed and 1844 * @total_flags with the new flag states. 1845 * 1846 * If your device has no multicast address filters your driver will 1847 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1848 * parameter to see whether multicast frames should be accepted 1849 * or dropped. 1850 * 1851 * All unsupported flags in @total_flags must be cleared. 1852 * Hardware does not support a flag if it is incapable of _passing_ 1853 * the frame to the stack. Otherwise the driver must ignore 1854 * the flag, but not clear it. 1855 * You must _only_ clear the flag (announce no support for the 1856 * flag to mac80211) if you are not able to pass the packet type 1857 * to the stack (so the hardware always filters it). 1858 * So for example, you should clear @FIF_CONTROL, if your hardware 1859 * always filters control frames. If your hardware always passes 1860 * control frames to the kernel and is incapable of filtering them, 1861 * you do _not_ clear the @FIF_CONTROL flag. 1862 * This rule applies to all other FIF flags as well. 1863 */ 1864 1865/** 1866 * DOC: AP support for powersaving clients 1867 * 1868 * In order to implement AP and P2P GO modes, mac80211 has support for 1869 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1870 * There currently is no support for sAPSD. 1871 * 1872 * There is one assumption that mac80211 makes, namely that a client 1873 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1874 * Both are supported, and both can be used by the same client, but 1875 * they can't be used concurrently by the same client. This simplifies 1876 * the driver code. 1877 * 1878 * The first thing to keep in mind is that there is a flag for complete 1879 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1880 * mac80211 expects the driver to handle most of the state machine for 1881 * powersaving clients and will ignore the PM bit in incoming frames. 1882 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1883 * stations' powersave transitions. In this mode, mac80211 also doesn't 1884 * handle PS-Poll/uAPSD. 1885 * 1886 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1887 * PM bit in incoming frames for client powersave transitions. When a 1888 * station goes to sleep, we will stop transmitting to it. There is, 1889 * however, a race condition: a station might go to sleep while there is 1890 * data buffered on hardware queues. If the device has support for this 1891 * it will reject frames, and the driver should give the frames back to 1892 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1893 * cause mac80211 to retry the frame when the station wakes up. The 1894 * driver is also notified of powersave transitions by calling its 1895 * @sta_notify callback. 1896 * 1897 * When the station is asleep, it has three choices: it can wake up, 1898 * it can PS-Poll, or it can possibly start a uAPSD service period. 1899 * Waking up is implemented by simply transmitting all buffered (and 1900 * filtered) frames to the station. This is the easiest case. When 1901 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1902 * will inform the driver of this with the @allow_buffered_frames 1903 * callback; this callback is optional. mac80211 will then transmit 1904 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1905 * on each frame. The last frame in the service period (or the only 1906 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1907 * indicate that it ends the service period; as this frame must have 1908 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1909 * When TX status is reported for this frame, the service period is 1910 * marked has having ended and a new one can be started by the peer. 1911 * 1912 * Additionally, non-bufferable MMPDUs can also be transmitted by 1913 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1914 * 1915 * Another race condition can happen on some devices like iwlwifi 1916 * when there are frames queued for the station and it wakes up 1917 * or polls; the frames that are already queued could end up being 1918 * transmitted first instead, causing reordering and/or wrong 1919 * processing of the EOSP. The cause is that allowing frames to be 1920 * transmitted to a certain station is out-of-band communication to 1921 * the device. To allow this problem to be solved, the driver can 1922 * call ieee80211_sta_block_awake() if frames are buffered when it 1923 * is notified that the station went to sleep. When all these frames 1924 * have been filtered (see above), it must call the function again 1925 * to indicate that the station is no longer blocked. 1926 * 1927 * If the driver buffers frames in the driver for aggregation in any 1928 * way, it must use the ieee80211_sta_set_buffered() call when it is 1929 * notified of the station going to sleep to inform mac80211 of any 1930 * TIDs that have frames buffered. Note that when a station wakes up 1931 * this information is reset (hence the requirement to call it when 1932 * informed of the station going to sleep). Then, when a service 1933 * period starts for any reason, @release_buffered_frames is called 1934 * with the number of frames to be released and which TIDs they are 1935 * to come from. In this case, the driver is responsible for setting 1936 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1937 * to help the @more_data paramter is passed to tell the driver if 1938 * there is more data on other TIDs -- the TIDs to release frames 1939 * from are ignored since mac80211 doesn't know how many frames the 1940 * buffers for those TIDs contain. 1941 * 1942 * If the driver also implement GO mode, where absence periods may 1943 * shorten service periods (or abort PS-Poll responses), it must 1944 * filter those response frames except in the case of frames that 1945 * are buffered in the driver -- those must remain buffered to avoid 1946 * reordering. Because it is possible that no frames are released 1947 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1948 * to indicate to mac80211 that the service period ended anyway. 1949 * 1950 * Finally, if frames from multiple TIDs are released from mac80211 1951 * but the driver might reorder them, it must clear & set the flags 1952 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1953 * and also take care of the EOSP and MORE_DATA bits in the frame. 1954 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1955 */ 1956 1957/** 1958 * DOC: HW queue control 1959 * 1960 * Before HW queue control was introduced, mac80211 only had a single static 1961 * assignment of per-interface AC software queues to hardware queues. This 1962 * was problematic for a few reasons: 1963 * 1) off-channel transmissions might get stuck behind other frames 1964 * 2) multiple virtual interfaces couldn't be handled correctly 1965 * 3) after-DTIM frames could get stuck behind other frames 1966 * 1967 * To solve this, hardware typically uses multiple different queues for all 1968 * the different usages, and this needs to be propagated into mac80211 so it 1969 * won't have the same problem with the software queues. 1970 * 1971 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 1972 * flag that tells it that the driver implements its own queue control. To do 1973 * so, the driver will set up the various queues in each &struct ieee80211_vif 1974 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 1975 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 1976 * if necessary will queue the frame on the right software queue that mirrors 1977 * the hardware queue. 1978 * Additionally, the driver has to then use these HW queue IDs for the queue 1979 * management functions (ieee80211_stop_queue() et al.) 1980 * 1981 * The driver is free to set up the queue mappings as needed, multiple virtual 1982 * interfaces may map to the same hardware queues if needed. The setup has to 1983 * happen during add_interface or change_interface callbacks. For example, a 1984 * driver supporting station+station and station+AP modes might decide to have 1985 * 10 hardware queues to handle different scenarios: 1986 * 1987 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 1988 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 1989 * after-DTIM queue for AP: 8 1990 * off-channel queue: 9 1991 * 1992 * It would then set up the hardware like this: 1993 * hw.offchannel_tx_hw_queue = 9 1994 * 1995 * and the first virtual interface that is added as follows: 1996 * vif.hw_queue[IEEE80211_AC_VO] = 0 1997 * vif.hw_queue[IEEE80211_AC_VI] = 1 1998 * vif.hw_queue[IEEE80211_AC_BE] = 2 1999 * vif.hw_queue[IEEE80211_AC_BK] = 3 2000 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2001 * and the second virtual interface with 4-7. 2002 * 2003 * If queue 6 gets full, for example, mac80211 would only stop the second 2004 * virtual interface's BE queue since virtual interface queues are per AC. 2005 * 2006 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2007 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2008 * queue could potentially be shared since mac80211 will look at cab_queue when 2009 * a queue is stopped/woken even if the interface is not in AP mode. 2010 */ 2011 2012/** 2013 * enum ieee80211_filter_flags - hardware filter flags 2014 * 2015 * These flags determine what the filter in hardware should be 2016 * programmed to let through and what should not be passed to the 2017 * stack. It is always safe to pass more frames than requested, 2018 * but this has negative impact on power consumption. 2019 * 2020 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 2021 * think of the BSS as your network segment and then this corresponds 2022 * to the regular ethernet device promiscuous mode. 2023 * 2024 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2025 * by the user or if the hardware is not capable of filtering by 2026 * multicast address. 2027 * 2028 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2029 * %RX_FLAG_FAILED_FCS_CRC for them) 2030 * 2031 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2032 * the %RX_FLAG_FAILED_PLCP_CRC for them 2033 * 2034 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2035 * to the hardware that it should not filter beacons or probe responses 2036 * by BSSID. Filtering them can greatly reduce the amount of processing 2037 * mac80211 needs to do and the amount of CPU wakeups, so you should 2038 * honour this flag if possible. 2039 * 2040 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2041 * is not set then only those addressed to this station. 2042 * 2043 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2044 * 2045 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2046 * those addressed to this station. 2047 * 2048 * @FIF_PROBE_REQ: pass probe request frames 2049 */ 2050enum ieee80211_filter_flags { 2051 FIF_PROMISC_IN_BSS = 1<<0, 2052 FIF_ALLMULTI = 1<<1, 2053 FIF_FCSFAIL = 1<<2, 2054 FIF_PLCPFAIL = 1<<3, 2055 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2056 FIF_CONTROL = 1<<5, 2057 FIF_OTHER_BSS = 1<<6, 2058 FIF_PSPOLL = 1<<7, 2059 FIF_PROBE_REQ = 1<<8, 2060}; 2061 2062/** 2063 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2064 * 2065 * These flags are used with the ampdu_action() callback in 2066 * &struct ieee80211_ops to indicate which action is needed. 2067 * 2068 * Note that drivers MUST be able to deal with a TX aggregation 2069 * session being stopped even before they OK'ed starting it by 2070 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2071 * might receive the addBA frame and send a delBA right away! 2072 * 2073 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2074 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2075 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2076 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2077 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2078 * queued packets, now unaggregated. After all packets are transmitted the 2079 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2080 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2081 * called when the station is removed. There's no need or reason to call 2082 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2083 * session is gone and removes the station. 2084 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2085 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2086 * now the connection is dropped and the station will be removed. Drivers 2087 * should clean up and drop remaining packets when this is called. 2088 */ 2089enum ieee80211_ampdu_mlme_action { 2090 IEEE80211_AMPDU_RX_START, 2091 IEEE80211_AMPDU_RX_STOP, 2092 IEEE80211_AMPDU_TX_START, 2093 IEEE80211_AMPDU_TX_STOP_CONT, 2094 IEEE80211_AMPDU_TX_STOP_FLUSH, 2095 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2096 IEEE80211_AMPDU_TX_OPERATIONAL, 2097}; 2098 2099/** 2100 * enum ieee80211_frame_release_type - frame release reason 2101 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2102 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2103 * frame received on trigger-enabled AC 2104 */ 2105enum ieee80211_frame_release_type { 2106 IEEE80211_FRAME_RELEASE_PSPOLL, 2107 IEEE80211_FRAME_RELEASE_UAPSD, 2108}; 2109 2110/** 2111 * enum ieee80211_rate_control_changed - flags to indicate what changed 2112 * 2113 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2114 * to this station changed. The actual bandwidth is in the station 2115 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2116 * flag changes, for HT and VHT the bandwidth field changes. 2117 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2118 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2119 * changed (in IBSS mode) due to discovering more information about 2120 * the peer. 2121 */ 2122enum ieee80211_rate_control_changed { 2123 IEEE80211_RC_BW_CHANGED = BIT(0), 2124 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2125 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2126}; 2127 2128/** 2129 * struct ieee80211_ops - callbacks from mac80211 to the driver 2130 * 2131 * This structure contains various callbacks that the driver may 2132 * handle or, in some cases, must handle, for example to configure 2133 * the hardware to a new channel or to transmit a frame. 2134 * 2135 * @tx: Handler that 802.11 module calls for each transmitted frame. 2136 * skb contains the buffer starting from the IEEE 802.11 header. 2137 * The low-level driver should send the frame out based on 2138 * configuration in the TX control data. This handler should, 2139 * preferably, never fail and stop queues appropriately. 2140 * Must be atomic. 2141 * 2142 * @start: Called before the first netdevice attached to the hardware 2143 * is enabled. This should turn on the hardware and must turn on 2144 * frame reception (for possibly enabled monitor interfaces.) 2145 * Returns negative error codes, these may be seen in userspace, 2146 * or zero. 2147 * When the device is started it should not have a MAC address 2148 * to avoid acknowledging frames before a non-monitor device 2149 * is added. 2150 * Must be implemented and can sleep. 2151 * 2152 * @stop: Called after last netdevice attached to the hardware 2153 * is disabled. This should turn off the hardware (at least 2154 * it must turn off frame reception.) 2155 * May be called right after add_interface if that rejects 2156 * an interface. If you added any work onto the mac80211 workqueue 2157 * you should ensure to cancel it on this callback. 2158 * Must be implemented and can sleep. 2159 * 2160 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2161 * stop transmitting and doing any other configuration, and then 2162 * ask the device to suspend. This is only invoked when WoWLAN is 2163 * configured, otherwise the device is deconfigured completely and 2164 * reconfigured at resume time. 2165 * The driver may also impose special conditions under which it 2166 * wants to use the "normal" suspend (deconfigure), say if it only 2167 * supports WoWLAN when the device is associated. In this case, it 2168 * must return 1 from this function. 2169 * 2170 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2171 * now resuming its operation, after this the device must be fully 2172 * functional again. If this returns an error, the only way out is 2173 * to also unregister the device. If it returns 1, then mac80211 2174 * will also go through the regular complete restart on resume. 2175 * 2176 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2177 * modified. The reason is that device_set_wakeup_enable() is 2178 * supposed to be called when the configuration changes, not only 2179 * in suspend(). 2180 * 2181 * @add_interface: Called when a netdevice attached to the hardware is 2182 * enabled. Because it is not called for monitor mode devices, @start 2183 * and @stop must be implemented. 2184 * The driver should perform any initialization it needs before 2185 * the device can be enabled. The initial configuration for the 2186 * interface is given in the conf parameter. 2187 * The callback may refuse to add an interface by returning a 2188 * negative error code (which will be seen in userspace.) 2189 * Must be implemented and can sleep. 2190 * 2191 * @change_interface: Called when a netdevice changes type. This callback 2192 * is optional, but only if it is supported can interface types be 2193 * switched while the interface is UP. The callback may sleep. 2194 * Note that while an interface is being switched, it will not be 2195 * found by the interface iteration callbacks. 2196 * 2197 * @remove_interface: Notifies a driver that an interface is going down. 2198 * The @stop callback is called after this if it is the last interface 2199 * and no monitor interfaces are present. 2200 * When all interfaces are removed, the MAC address in the hardware 2201 * must be cleared so the device no longer acknowledges packets, 2202 * the mac_addr member of the conf structure is, however, set to the 2203 * MAC address of the device going away. 2204 * Hence, this callback must be implemented. It can sleep. 2205 * 2206 * @add_interface_debugfs: Drivers can use this callback to add debugfs files 2207 * when a vif is added to mac80211. This callback and 2208 * @remove_interface_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2209 * conditional. @remove_interface_debugfs must be provided for cleanup. 2210 * This callback can sleep. 2211 * 2212 * @remove_interface_debugfs: Remove the debugfs files which were added using 2213 * @add_interface_debugfs. This callback must remove all debugfs entries 2214 * that were added because mac80211 only removes interface debugfs when the 2215 * interface is destroyed, not when it is removed from the driver. 2216 * This callback can sleep. 2217 * 2218 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2219 * function to change hardware configuration, e.g., channel. 2220 * This function should never fail but returns a negative error code 2221 * if it does. The callback can sleep. 2222 * 2223 * @bss_info_changed: Handler for configuration requests related to BSS 2224 * parameters that may vary during BSS's lifespan, and may affect low 2225 * level driver (e.g. assoc/disassoc status, erp parameters). 2226 * This function should not be used if no BSS has been set, unless 2227 * for association indication. The @changed parameter indicates which 2228 * of the bss parameters has changed when a call is made. The callback 2229 * can sleep. 2230 * 2231 * @prepare_multicast: Prepare for multicast filter configuration. 2232 * This callback is optional, and its return value is passed 2233 * to configure_filter(). This callback must be atomic. 2234 * 2235 * @configure_filter: Configure the device's RX filter. 2236 * See the section "Frame filtering" for more information. 2237 * This callback must be implemented and can sleep. 2238 * 2239 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2240 * must be set or cleared for a given STA. Must be atomic. 2241 * 2242 * @set_key: See the section "Hardware crypto acceleration" 2243 * This callback is only called between add_interface and 2244 * remove_interface calls, i.e. while the given virtual interface 2245 * is enabled. 2246 * Returns a negative error code if the key can't be added. 2247 * The callback can sleep. 2248 * 2249 * @update_tkip_key: See the section "Hardware crypto acceleration" 2250 * This callback will be called in the context of Rx. Called for drivers 2251 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2252 * The callback must be atomic. 2253 * 2254 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2255 * host is suspended, it can assign this callback to retrieve the data 2256 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2257 * After rekeying was done it should (for example during resume) notify 2258 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2259 * 2260 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2261 * WEP when the device sends data packets autonomously, e.g. for ARP 2262 * offloading. The index can be 0-3, or -1 for unsetting it. 2263 * 2264 * @hw_scan: Ask the hardware to service the scan request, no need to start 2265 * the scan state machine in stack. The scan must honour the channel 2266 * configuration done by the regulatory agent in the wiphy's 2267 * registered bands. The hardware (or the driver) needs to make sure 2268 * that power save is disabled. 2269 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2270 * entire IEs after the SSID, so that drivers need not look at these 2271 * at all but just send them after the SSID -- mac80211 includes the 2272 * (extended) supported rates and HT information (where applicable). 2273 * When the scan finishes, ieee80211_scan_completed() must be called; 2274 * note that it also must be called when the scan cannot finish due to 2275 * any error unless this callback returned a negative error code. 2276 * The callback can sleep. 2277 * 2278 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2279 * The driver should ask the hardware to cancel the scan (if possible), 2280 * but the scan will be completed only after the driver will call 2281 * ieee80211_scan_completed(). 2282 * This callback is needed for wowlan, to prevent enqueueing a new 2283 * scan_work after the low-level driver was already suspended. 2284 * The callback can sleep. 2285 * 2286 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2287 * specific intervals. The driver must call the 2288 * ieee80211_sched_scan_results() function whenever it finds results. 2289 * This process will continue until sched_scan_stop is called. 2290 * 2291 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2292 * 2293 * @sw_scan_start: Notifier function that is called just before a software scan 2294 * is started. Can be NULL, if the driver doesn't need this notification. 2295 * The callback can sleep. 2296 * 2297 * @sw_scan_complete: Notifier function that is called just after a 2298 * software scan finished. Can be NULL, if the driver doesn't need 2299 * this notification. 2300 * The callback can sleep. 2301 * 2302 * @get_stats: Return low-level statistics. 2303 * Returns zero if statistics are available. 2304 * The callback can sleep. 2305 * 2306 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2307 * callback should be provided to read the TKIP transmit IVs (both IV32 2308 * and IV16) for the given key from hardware. 2309 * The callback must be atomic. 2310 * 2311 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2312 * if the device does fragmentation by itself; if this callback is 2313 * implemented then the stack will not do fragmentation. 2314 * The callback can sleep. 2315 * 2316 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2317 * The callback can sleep. 2318 * 2319 * @sta_add: Notifies low level driver about addition of an associated station, 2320 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2321 * 2322 * @sta_remove: Notifies low level driver about removal of an associated 2323 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2324 * 2325 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2326 * when a station is added to mac80211's station list. This callback 2327 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2328 * conditional. This callback can sleep. 2329 * 2330 * @sta_remove_debugfs: Remove the debugfs files which were added using 2331 * @sta_add_debugfs. This callback can sleep. 2332 * 2333 * @sta_notify: Notifies low level driver about power state transition of an 2334 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2335 * in AP mode, this callback will not be called when the flag 2336 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2337 * 2338 * @sta_state: Notifies low level driver about state transition of a 2339 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2340 * This callback is mutually exclusive with @sta_add/@sta_remove. 2341 * It must not fail for down transitions but may fail for transitions 2342 * up the list of states. 2343 * The callback can sleep. 2344 * 2345 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2346 * used to transmit to the station. The changes are advertised with bits 2347 * from &enum ieee80211_rate_control_changed and the values are reflected 2348 * in the station data. This callback should only be used when the driver 2349 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2350 * otherwise the rate control algorithm is notified directly. 2351 * Must be atomic. 2352 * 2353 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2354 * bursting) for a hardware TX queue. 2355 * Returns a negative error code on failure. 2356 * The callback can sleep. 2357 * 2358 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2359 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2360 * required function. 2361 * The callback can sleep. 2362 * 2363 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2364 * Currently, this is only used for IBSS mode debugging. Is not a 2365 * required function. 2366 * The callback can sleep. 2367 * 2368 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2369 * with other STAs in the IBSS. This is only used in IBSS mode. This 2370 * function is optional if the firmware/hardware takes full care of 2371 * TSF synchronization. 2372 * The callback can sleep. 2373 * 2374 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2375 * This is needed only for IBSS mode and the result of this function is 2376 * used to determine whether to reply to Probe Requests. 2377 * Returns non-zero if this device sent the last beacon. 2378 * The callback can sleep. 2379 * 2380 * @ampdu_action: Perform a certain A-MPDU action 2381 * The RA/TID combination determines the destination and TID we want 2382 * the ampdu action to be performed for. The action is defined through 2383 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2384 * is the first frame we expect to perform the action on. Notice 2385 * that TX/RX_STOP can pass NULL for this parameter. 2386 * The @buf_size parameter is only valid when the action is set to 2387 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2388 * buffer size (number of subframes) for this session -- the driver 2389 * may neither send aggregates containing more subframes than this 2390 * nor send aggregates in a way that lost frames would exceed the 2391 * buffer size. If just limiting the aggregate size, this would be 2392 * possible with a buf_size of 8: 2393 * - TX: 1.....7 2394 * - RX: 2....7 (lost frame #1) 2395 * - TX: 8..1... 2396 * which is invalid since #1 was now re-transmitted well past the 2397 * buffer size of 8. Correct ways to retransmit #1 would be: 2398 * - TX: 1 or 18 or 81 2399 * Even "189" would be wrong since 1 could be lost again. 2400 * 2401 * Returns a negative error code on failure. 2402 * The callback can sleep. 2403 * 2404 * @get_survey: Return per-channel survey information 2405 * 2406 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2407 * need to set wiphy->rfkill_poll to %true before registration, 2408 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2409 * The callback can sleep. 2410 * 2411 * @set_coverage_class: Set slot time for given coverage class as specified 2412 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2413 * accordingly. This callback is not required and may sleep. 2414 * 2415 * @testmode_cmd: Implement a cfg80211 test mode command. 2416 * The callback can sleep. 2417 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2418 * 2419 * @flush: Flush all pending frames from the hardware queue, making sure 2420 * that the hardware queues are empty. If the parameter @drop is set 2421 * to %true, pending frames may be dropped. The callback can sleep. 2422 * 2423 * @channel_switch: Drivers that need (or want) to offload the channel 2424 * switch operation for CSAs received from the AP may implement this 2425 * callback. They must then call ieee80211_chswitch_done() to indicate 2426 * completion of the channel switch. 2427 * 2428 * @napi_poll: Poll Rx queue for incoming data frames. 2429 * 2430 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2431 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2432 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2433 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2434 * 2435 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2436 * 2437 * @remain_on_channel: Starts an off-channel period on the given channel, must 2438 * call back to ieee80211_ready_on_channel() when on that channel. Note 2439 * that normal channel traffic is not stopped as this is intended for hw 2440 * offload. Frames to transmit on the off-channel channel are transmitted 2441 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2442 * duration (which will always be non-zero) expires, the driver must call 2443 * ieee80211_remain_on_channel_expired(). 2444 * Note that this callback may be called while the device is in IDLE and 2445 * must be accepted in this case. 2446 * This callback may sleep. 2447 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2448 * aborted before it expires. This callback may sleep. 2449 * 2450 * @set_ringparam: Set tx and rx ring sizes. 2451 * 2452 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2453 * 2454 * @tx_frames_pending: Check if there is any pending frame in the hardware 2455 * queues before entering power save. 2456 * 2457 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2458 * when transmitting a frame. Currently only legacy rates are handled. 2459 * The callback can sleep. 2460 * @rssi_callback: Notify driver when the average RSSI goes above/below 2461 * thresholds that were registered previously. The callback can sleep. 2462 * 2463 * @release_buffered_frames: Release buffered frames according to the given 2464 * parameters. In the case where the driver buffers some frames for 2465 * sleeping stations mac80211 will use this callback to tell the driver 2466 * to release some frames, either for PS-poll or uAPSD. 2467 * Note that if the @more_data paramter is %false the driver must check 2468 * if there are more frames on the given TIDs, and if there are more than 2469 * the frames being released then it must still set the more-data bit in 2470 * the frame. If the @more_data parameter is %true, then of course the 2471 * more-data bit must always be set. 2472 * The @tids parameter tells the driver which TIDs to release frames 2473 * from, for PS-poll it will always have only a single bit set. 2474 * In the case this is used for a PS-poll initiated release, the 2475 * @num_frames parameter will always be 1 so code can be shared. In 2476 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2477 * on the TX status (and must report TX status) so that the PS-poll 2478 * period is properly ended. This is used to avoid sending multiple 2479 * responses for a retried PS-poll frame. 2480 * In the case this is used for uAPSD, the @num_frames parameter may be 2481 * bigger than one, but the driver may send fewer frames (it must send 2482 * at least one, however). In this case it is also responsible for 2483 * setting the EOSP flag in the QoS header of the frames. Also, when the 2484 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2485 * on the last frame in the SP. Alternatively, it may call the function 2486 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2487 * This callback must be atomic. 2488 * @allow_buffered_frames: Prepare device to allow the given number of frames 2489 * to go out to the given station. The frames will be sent by mac80211 2490 * via the usual TX path after this call. The TX information for frames 2491 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2492 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2493 * frames from multiple TIDs are released and the driver might reorder 2494 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2495 * on the last frame and clear it on all others and also handle the EOSP 2496 * bit in the QoS header correctly. Alternatively, it can also call the 2497 * ieee80211_sta_eosp_irqsafe() function. 2498 * The @tids parameter is a bitmap and tells the driver which TIDs the 2499 * frames will be on; it will at most have two bits set. 2500 * This callback must be atomic. 2501 * 2502 * @get_et_sset_count: Ethtool API to get string-set count. 2503 * 2504 * @get_et_stats: Ethtool API to get a set of u64 stats. 2505 * 2506 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2507 * and perhaps other supported types of ethtool data-sets. 2508 * 2509 * @get_rssi: Get current signal strength in dBm, the function is optional 2510 * and can sleep. 2511 * 2512 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2513 * before associated. In multi-channel scenarios, a virtual interface is 2514 * bound to a channel before it is associated, but as it isn't associated 2515 * yet it need not necessarily be given airtime, in particular since any 2516 * transmission to a P2P GO needs to be synchronized against the GO's 2517 * powersave state. mac80211 will call this function before transmitting a 2518 * management frame prior to having successfully associated to allow the 2519 * driver to give it channel time for the transmission, to get a response 2520 * and to be able to synchronize with the GO. 2521 * The callback will be called before each transmission and upon return 2522 * mac80211 will transmit the frame right away. 2523 * The callback is optional and can (should!) sleep. 2524 * 2525 * @add_chanctx: Notifies device driver about new channel context creation. 2526 * @remove_chanctx: Notifies device driver about channel context destruction. 2527 * @change_chanctx: Notifies device driver about channel context changes that 2528 * may happen when combining different virtual interfaces on the same 2529 * channel context with different settings 2530 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2531 * to vif. Possible use is for hw queue remapping. 2532 * @unassign_vif_chanctx: Notifies device driver about channel context being 2533 * unbound from vif. 2534 * @start_ap: Start operation on the AP interface, this is called after all the 2535 * information in bss_conf is set and beacon can be retrieved. A channel 2536 * context is bound before this is called. Note that if the driver uses 2537 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2538 * just "paused" for scanning/ROC, which is indicated by the beacon being 2539 * disabled/enabled via @bss_info_changed. 2540 * @stop_ap: Stop operation on the AP interface. 2541 * 2542 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2543 * reconfiguration has completed. This can help the driver implement the 2544 * reconfiguration step. Also called when reconfiguring because the 2545 * driver's resume function returned 1, as this is just like an "inline" 2546 * hardware restart. This callback may sleep. 2547 * 2548 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2549 * Currently, this is only called for managed or P2P client interfaces. 2550 * This callback is optional; it must not sleep. 2551 */ 2552struct ieee80211_ops { 2553 void (*tx)(struct ieee80211_hw *hw, 2554 struct ieee80211_tx_control *control, 2555 struct sk_buff *skb); 2556 int (*start)(struct ieee80211_hw *hw); 2557 void (*stop)(struct ieee80211_hw *hw); 2558#ifdef CONFIG_PM 2559 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2560 int (*resume)(struct ieee80211_hw *hw); 2561 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2562#endif 2563 int (*add_interface)(struct ieee80211_hw *hw, 2564 struct ieee80211_vif *vif); 2565 int (*change_interface)(struct ieee80211_hw *hw, 2566 struct ieee80211_vif *vif, 2567 enum nl80211_iftype new_type, bool p2p); 2568 void (*remove_interface)(struct ieee80211_hw *hw, 2569 struct ieee80211_vif *vif); 2570 int (*config)(struct ieee80211_hw *hw, u32 changed); 2571 void (*bss_info_changed)(struct ieee80211_hw *hw, 2572 struct ieee80211_vif *vif, 2573 struct ieee80211_bss_conf *info, 2574 u32 changed); 2575 2576 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2577 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2578 2579 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2580 struct netdev_hw_addr_list *mc_list); 2581 void (*configure_filter)(struct ieee80211_hw *hw, 2582 unsigned int changed_flags, 2583 unsigned int *total_flags, 2584 u64 multicast); 2585 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2586 bool set); 2587 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2588 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2589 struct ieee80211_key_conf *key); 2590 void (*update_tkip_key)(struct ieee80211_hw *hw, 2591 struct ieee80211_vif *vif, 2592 struct ieee80211_key_conf *conf, 2593 struct ieee80211_sta *sta, 2594 u32 iv32, u16 *phase1key); 2595 void (*set_rekey_data)(struct ieee80211_hw *hw, 2596 struct ieee80211_vif *vif, 2597 struct cfg80211_gtk_rekey_data *data); 2598 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2599 struct ieee80211_vif *vif, int idx); 2600 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2601 struct cfg80211_scan_request *req); 2602 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2603 struct ieee80211_vif *vif); 2604 int (*sched_scan_start)(struct ieee80211_hw *hw, 2605 struct ieee80211_vif *vif, 2606 struct cfg80211_sched_scan_request *req, 2607 struct ieee80211_sched_scan_ies *ies); 2608 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2609 struct ieee80211_vif *vif); 2610 void (*sw_scan_start)(struct ieee80211_hw *hw); 2611 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2612 int (*get_stats)(struct ieee80211_hw *hw, 2613 struct ieee80211_low_level_stats *stats); 2614 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2615 u32 *iv32, u16 *iv16); 2616 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2617 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2618 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2619 struct ieee80211_sta *sta); 2620 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2621 struct ieee80211_sta *sta); 2622#ifdef CONFIG_MAC80211_DEBUGFS 2623 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2624 struct ieee80211_vif *vif, 2625 struct ieee80211_sta *sta, 2626 struct dentry *dir); 2627 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2628 struct ieee80211_vif *vif, 2629 struct ieee80211_sta *sta, 2630 struct dentry *dir); 2631 void (*add_interface_debugfs)(struct ieee80211_hw *hw, 2632 struct ieee80211_vif *vif, 2633 struct dentry *dir); 2634 void (*remove_interface_debugfs)(struct ieee80211_hw *hw, 2635 struct ieee80211_vif *vif, 2636 struct dentry *dir); 2637#endif 2638 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2639 enum sta_notify_cmd, struct ieee80211_sta *sta); 2640 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2641 struct ieee80211_sta *sta, 2642 enum ieee80211_sta_state old_state, 2643 enum ieee80211_sta_state new_state); 2644 void (*sta_rc_update)(struct ieee80211_hw *hw, 2645 struct ieee80211_vif *vif, 2646 struct ieee80211_sta *sta, 2647 u32 changed); 2648 int (*conf_tx)(struct ieee80211_hw *hw, 2649 struct ieee80211_vif *vif, u16 ac, 2650 const struct ieee80211_tx_queue_params *params); 2651 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2652 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2653 u64 tsf); 2654 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2655 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2656 int (*ampdu_action)(struct ieee80211_hw *hw, 2657 struct ieee80211_vif *vif, 2658 enum ieee80211_ampdu_mlme_action action, 2659 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2660 u8 buf_size); 2661 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2662 struct survey_info *survey); 2663 void (*rfkill_poll)(struct ieee80211_hw *hw); 2664 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2665#ifdef CONFIG_NL80211_TESTMODE 2666 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2667 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2668 struct netlink_callback *cb, 2669 void *data, int len); 2670#endif 2671 void (*flush)(struct ieee80211_hw *hw, bool drop); 2672 void (*channel_switch)(struct ieee80211_hw *hw, 2673 struct ieee80211_channel_switch *ch_switch); 2674 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2675 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2676 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2677 2678 int (*remain_on_channel)(struct ieee80211_hw *hw, 2679 struct ieee80211_vif *vif, 2680 struct ieee80211_channel *chan, 2681 int duration); 2682 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2683 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2684 void (*get_ringparam)(struct ieee80211_hw *hw, 2685 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2686 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2687 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2688 const struct cfg80211_bitrate_mask *mask); 2689 void (*rssi_callback)(struct ieee80211_hw *hw, 2690 struct ieee80211_vif *vif, 2691 enum ieee80211_rssi_event rssi_event); 2692 2693 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2694 struct ieee80211_sta *sta, 2695 u16 tids, int num_frames, 2696 enum ieee80211_frame_release_type reason, 2697 bool more_data); 2698 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2699 struct ieee80211_sta *sta, 2700 u16 tids, int num_frames, 2701 enum ieee80211_frame_release_type reason, 2702 bool more_data); 2703 2704 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2705 struct ieee80211_vif *vif, int sset); 2706 void (*get_et_stats)(struct ieee80211_hw *hw, 2707 struct ieee80211_vif *vif, 2708 struct ethtool_stats *stats, u64 *data); 2709 void (*get_et_strings)(struct ieee80211_hw *hw, 2710 struct ieee80211_vif *vif, 2711 u32 sset, u8 *data); 2712 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2713 struct ieee80211_sta *sta, s8 *rssi_dbm); 2714 2715 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2716 struct ieee80211_vif *vif); 2717 2718 int (*add_chanctx)(struct ieee80211_hw *hw, 2719 struct ieee80211_chanctx_conf *ctx); 2720 void (*remove_chanctx)(struct ieee80211_hw *hw, 2721 struct ieee80211_chanctx_conf *ctx); 2722 void (*change_chanctx)(struct ieee80211_hw *hw, 2723 struct ieee80211_chanctx_conf *ctx, 2724 u32 changed); 2725 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2726 struct ieee80211_vif *vif, 2727 struct ieee80211_chanctx_conf *ctx); 2728 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2729 struct ieee80211_vif *vif, 2730 struct ieee80211_chanctx_conf *ctx); 2731 2732 void (*restart_complete)(struct ieee80211_hw *hw); 2733 2734#if IS_ENABLED(CONFIG_IPV6) 2735 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2736 struct ieee80211_vif *vif, 2737 struct inet6_dev *idev); 2738#endif 2739}; 2740 2741/** 2742 * ieee80211_alloc_hw - Allocate a new hardware device 2743 * 2744 * This must be called once for each hardware device. The returned pointer 2745 * must be used to refer to this device when calling other functions. 2746 * mac80211 allocates a private data area for the driver pointed to by 2747 * @priv in &struct ieee80211_hw, the size of this area is given as 2748 * @priv_data_len. 2749 * 2750 * @priv_data_len: length of private data 2751 * @ops: callbacks for this device 2752 * 2753 * Return: A pointer to the new hardware device, or %NULL on error. 2754 */ 2755struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2756 const struct ieee80211_ops *ops); 2757 2758/** 2759 * ieee80211_register_hw - Register hardware device 2760 * 2761 * You must call this function before any other functions in 2762 * mac80211. Note that before a hardware can be registered, you 2763 * need to fill the contained wiphy's information. 2764 * 2765 * @hw: the device to register as returned by ieee80211_alloc_hw() 2766 * 2767 * Return: 0 on success. An error code otherwise. 2768 */ 2769int ieee80211_register_hw(struct ieee80211_hw *hw); 2770 2771/** 2772 * struct ieee80211_tpt_blink - throughput blink description 2773 * @throughput: throughput in Kbit/sec 2774 * @blink_time: blink time in milliseconds 2775 * (full cycle, ie. one off + one on period) 2776 */ 2777struct ieee80211_tpt_blink { 2778 int throughput; 2779 int blink_time; 2780}; 2781 2782/** 2783 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2784 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2785 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2786 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2787 * interface is connected in some way, including being an AP 2788 */ 2789enum ieee80211_tpt_led_trigger_flags { 2790 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2791 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2792 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2793}; 2794 2795#ifdef CONFIG_MAC80211_LEDS 2796extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2797extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2798extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2799extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2800extern char *__ieee80211_create_tpt_led_trigger( 2801 struct ieee80211_hw *hw, unsigned int flags, 2802 const struct ieee80211_tpt_blink *blink_table, 2803 unsigned int blink_table_len); 2804#endif 2805/** 2806 * ieee80211_get_tx_led_name - get name of TX LED 2807 * 2808 * mac80211 creates a transmit LED trigger for each wireless hardware 2809 * that can be used to drive LEDs if your driver registers a LED device. 2810 * This function returns the name (or %NULL if not configured for LEDs) 2811 * of the trigger so you can automatically link the LED device. 2812 * 2813 * @hw: the hardware to get the LED trigger name for 2814 * 2815 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2816 */ 2817static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2818{ 2819#ifdef CONFIG_MAC80211_LEDS 2820 return __ieee80211_get_tx_led_name(hw); 2821#else 2822 return NULL; 2823#endif 2824} 2825 2826/** 2827 * ieee80211_get_rx_led_name - get name of RX LED 2828 * 2829 * mac80211 creates a receive LED trigger for each wireless hardware 2830 * that can be used to drive LEDs if your driver registers a LED device. 2831 * This function returns the name (or %NULL if not configured for LEDs) 2832 * of the trigger so you can automatically link the LED device. 2833 * 2834 * @hw: the hardware to get the LED trigger name for 2835 * 2836 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2837 */ 2838static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2839{ 2840#ifdef CONFIG_MAC80211_LEDS 2841 return __ieee80211_get_rx_led_name(hw); 2842#else 2843 return NULL; 2844#endif 2845} 2846 2847/** 2848 * ieee80211_get_assoc_led_name - get name of association LED 2849 * 2850 * mac80211 creates a association LED trigger for each wireless hardware 2851 * that can be used to drive LEDs if your driver registers a LED device. 2852 * This function returns the name (or %NULL if not configured for LEDs) 2853 * of the trigger so you can automatically link the LED device. 2854 * 2855 * @hw: the hardware to get the LED trigger name for 2856 * 2857 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2858 */ 2859static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2860{ 2861#ifdef CONFIG_MAC80211_LEDS 2862 return __ieee80211_get_assoc_led_name(hw); 2863#else 2864 return NULL; 2865#endif 2866} 2867 2868/** 2869 * ieee80211_get_radio_led_name - get name of radio LED 2870 * 2871 * mac80211 creates a radio change LED trigger for each wireless hardware 2872 * that can be used to drive LEDs if your driver registers a LED device. 2873 * This function returns the name (or %NULL if not configured for LEDs) 2874 * of the trigger so you can automatically link the LED device. 2875 * 2876 * @hw: the hardware to get the LED trigger name for 2877 * 2878 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2879 */ 2880static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2881{ 2882#ifdef CONFIG_MAC80211_LEDS 2883 return __ieee80211_get_radio_led_name(hw); 2884#else 2885 return NULL; 2886#endif 2887} 2888 2889/** 2890 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2891 * @hw: the hardware to create the trigger for 2892 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2893 * @blink_table: the blink table -- needs to be ordered by throughput 2894 * @blink_table_len: size of the blink table 2895 * 2896 * Return: %NULL (in case of error, or if no LED triggers are 2897 * configured) or the name of the new trigger. 2898 * 2899 * Note: This function must be called before ieee80211_register_hw(). 2900 */ 2901static inline char * 2902ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2903 const struct ieee80211_tpt_blink *blink_table, 2904 unsigned int blink_table_len) 2905{ 2906#ifdef CONFIG_MAC80211_LEDS 2907 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2908 blink_table_len); 2909#else 2910 return NULL; 2911#endif 2912} 2913 2914/** 2915 * ieee80211_unregister_hw - Unregister a hardware device 2916 * 2917 * This function instructs mac80211 to free allocated resources 2918 * and unregister netdevices from the networking subsystem. 2919 * 2920 * @hw: the hardware to unregister 2921 */ 2922void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2923 2924/** 2925 * ieee80211_free_hw - free hardware descriptor 2926 * 2927 * This function frees everything that was allocated, including the 2928 * private data for the driver. You must call ieee80211_unregister_hw() 2929 * before calling this function. 2930 * 2931 * @hw: the hardware to free 2932 */ 2933void ieee80211_free_hw(struct ieee80211_hw *hw); 2934 2935/** 2936 * ieee80211_restart_hw - restart hardware completely 2937 * 2938 * Call this function when the hardware was restarted for some reason 2939 * (hardware error, ...) and the driver is unable to restore its state 2940 * by itself. mac80211 assumes that at this point the driver/hardware 2941 * is completely uninitialised and stopped, it starts the process by 2942 * calling the ->start() operation. The driver will need to reset all 2943 * internal state that it has prior to calling this function. 2944 * 2945 * @hw: the hardware to restart 2946 */ 2947void ieee80211_restart_hw(struct ieee80211_hw *hw); 2948 2949/** ieee80211_napi_schedule - schedule NAPI poll 2950 * 2951 * Use this function to schedule NAPI polling on a device. 2952 * 2953 * @hw: the hardware to start polling 2954 */ 2955void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2956 2957/** ieee80211_napi_complete - complete NAPI polling 2958 * 2959 * Use this function to finish NAPI polling on a device. 2960 * 2961 * @hw: the hardware to stop polling 2962 */ 2963void ieee80211_napi_complete(struct ieee80211_hw *hw); 2964 2965/** 2966 * ieee80211_rx - receive frame 2967 * 2968 * Use this function to hand received frames to mac80211. The receive 2969 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2970 * paged @skb is used, the driver is recommended to put the ieee80211 2971 * header of the frame on the linear part of the @skb to avoid memory 2972 * allocation and/or memcpy by the stack. 2973 * 2974 * This function may not be called in IRQ context. Calls to this function 2975 * for a single hardware must be synchronized against each other. Calls to 2976 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2977 * mixed for a single hardware. 2978 * 2979 * In process context use instead ieee80211_rx_ni(). 2980 * 2981 * @hw: the hardware this frame came in on 2982 * @skb: the buffer to receive, owned by mac80211 after this call 2983 */ 2984void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2985 2986/** 2987 * ieee80211_rx_irqsafe - receive frame 2988 * 2989 * Like ieee80211_rx() but can be called in IRQ context 2990 * (internally defers to a tasklet.) 2991 * 2992 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2993 * be mixed for a single hardware. 2994 * 2995 * @hw: the hardware this frame came in on 2996 * @skb: the buffer to receive, owned by mac80211 after this call 2997 */ 2998void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2999 3000/** 3001 * ieee80211_rx_ni - receive frame (in process context) 3002 * 3003 * Like ieee80211_rx() but can be called in process context 3004 * (internally disables bottom halves). 3005 * 3006 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3007 * not be mixed for a single hardware. 3008 * 3009 * @hw: the hardware this frame came in on 3010 * @skb: the buffer to receive, owned by mac80211 after this call 3011 */ 3012static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3013 struct sk_buff *skb) 3014{ 3015 local_bh_disable(); 3016 ieee80211_rx(hw, skb); 3017 local_bh_enable(); 3018} 3019 3020/** 3021 * ieee80211_sta_ps_transition - PS transition for connected sta 3022 * 3023 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3024 * flag set, use this function to inform mac80211 about a connected station 3025 * entering/leaving PS mode. 3026 * 3027 * This function may not be called in IRQ context or with softirqs enabled. 3028 * 3029 * Calls to this function for a single hardware must be synchronized against 3030 * each other. 3031 * 3032 * @sta: currently connected sta 3033 * @start: start or stop PS 3034 * 3035 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3036 */ 3037int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3038 3039/** 3040 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3041 * (in process context) 3042 * 3043 * Like ieee80211_sta_ps_transition() but can be called in process context 3044 * (internally disables bottom halves). Concurrent call restriction still 3045 * applies. 3046 * 3047 * @sta: currently connected sta 3048 * @start: start or stop PS 3049 * 3050 * Return: Like ieee80211_sta_ps_transition(). 3051 */ 3052static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3053 bool start) 3054{ 3055 int ret; 3056 3057 local_bh_disable(); 3058 ret = ieee80211_sta_ps_transition(sta, start); 3059 local_bh_enable(); 3060 3061 return ret; 3062} 3063 3064/* 3065 * The TX headroom reserved by mac80211 for its own tx_status functions. 3066 * This is enough for the radiotap header. 3067 */ 3068#define IEEE80211_TX_STATUS_HEADROOM 14 3069 3070/** 3071 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3072 * @sta: &struct ieee80211_sta pointer for the sleeping station 3073 * @tid: the TID that has buffered frames 3074 * @buffered: indicates whether or not frames are buffered for this TID 3075 * 3076 * If a driver buffers frames for a powersave station instead of passing 3077 * them back to mac80211 for retransmission, the station may still need 3078 * to be told that there are buffered frames via the TIM bit. 3079 * 3080 * This function informs mac80211 whether or not there are frames that are 3081 * buffered in the driver for a given TID; mac80211 can then use this data 3082 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3083 * call! Beware of the locking!) 3084 * 3085 * If all frames are released to the station (due to PS-poll or uAPSD) 3086 * then the driver needs to inform mac80211 that there no longer are 3087 * frames buffered. However, when the station wakes up mac80211 assumes 3088 * that all buffered frames will be transmitted and clears this data, 3089 * drivers need to make sure they inform mac80211 about all buffered 3090 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3091 * 3092 * Note that technically mac80211 only needs to know this per AC, not per 3093 * TID, but since driver buffering will inevitably happen per TID (since 3094 * it is related to aggregation) it is easier to make mac80211 map the 3095 * TID to the AC as required instead of keeping track in all drivers that 3096 * use this API. 3097 */ 3098void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3099 u8 tid, bool buffered); 3100 3101/** 3102 * ieee80211_tx_status - transmit status callback 3103 * 3104 * Call this function for all transmitted frames after they have been 3105 * transmitted. It is permissible to not call this function for 3106 * multicast frames but this can affect statistics. 3107 * 3108 * This function may not be called in IRQ context. Calls to this function 3109 * for a single hardware must be synchronized against each other. Calls 3110 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3111 * may not be mixed for a single hardware. 3112 * 3113 * @hw: the hardware the frame was transmitted by 3114 * @skb: the frame that was transmitted, owned by mac80211 after this call 3115 */ 3116void ieee80211_tx_status(struct ieee80211_hw *hw, 3117 struct sk_buff *skb); 3118 3119/** 3120 * ieee80211_tx_status_ni - transmit status callback (in process context) 3121 * 3122 * Like ieee80211_tx_status() but can be called in process context. 3123 * 3124 * Calls to this function, ieee80211_tx_status() and 3125 * ieee80211_tx_status_irqsafe() may not be mixed 3126 * for a single hardware. 3127 * 3128 * @hw: the hardware the frame was transmitted by 3129 * @skb: the frame that was transmitted, owned by mac80211 after this call 3130 */ 3131static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3132 struct sk_buff *skb) 3133{ 3134 local_bh_disable(); 3135 ieee80211_tx_status(hw, skb); 3136 local_bh_enable(); 3137} 3138 3139/** 3140 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3141 * 3142 * Like ieee80211_tx_status() but can be called in IRQ context 3143 * (internally defers to a tasklet.) 3144 * 3145 * Calls to this function, ieee80211_tx_status() and 3146 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3147 * 3148 * @hw: the hardware the frame was transmitted by 3149 * @skb: the frame that was transmitted, owned by mac80211 after this call 3150 */ 3151void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3152 struct sk_buff *skb); 3153 3154/** 3155 * ieee80211_report_low_ack - report non-responding station 3156 * 3157 * When operating in AP-mode, call this function to report a non-responding 3158 * connected STA. 3159 * 3160 * @sta: the non-responding connected sta 3161 * @num_packets: number of packets sent to @sta without a response 3162 */ 3163void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3164 3165/** 3166 * ieee80211_beacon_get_tim - beacon generation function 3167 * @hw: pointer obtained from ieee80211_alloc_hw(). 3168 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3169 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3170 * Set to 0 if invalid (in non-AP modes). 3171 * @tim_length: pointer to variable that will receive the TIM IE length, 3172 * (including the ID and length bytes!). 3173 * Set to 0 if invalid (in non-AP modes). 3174 * 3175 * If the driver implements beaconing modes, it must use this function to 3176 * obtain the beacon frame/template. 3177 * 3178 * If the beacon frames are generated by the host system (i.e., not in 3179 * hardware/firmware), the driver uses this function to get each beacon 3180 * frame from mac80211 -- it is responsible for calling this function 3181 * before the beacon is needed (e.g. based on hardware interrupt). 3182 * 3183 * If the beacon frames are generated by the device, then the driver 3184 * must use the returned beacon as the template and change the TIM IE 3185 * according to the current DTIM parameters/TIM bitmap. 3186 * 3187 * The driver is responsible for freeing the returned skb. 3188 * 3189 * Return: The beacon template. %NULL on error. 3190 */ 3191struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3192 struct ieee80211_vif *vif, 3193 u16 *tim_offset, u16 *tim_length); 3194 3195/** 3196 * ieee80211_beacon_get - beacon generation function 3197 * @hw: pointer obtained from ieee80211_alloc_hw(). 3198 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3199 * 3200 * See ieee80211_beacon_get_tim(). 3201 * 3202 * Return: See ieee80211_beacon_get_tim(). 3203 */ 3204static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3205 struct ieee80211_vif *vif) 3206{ 3207 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3208} 3209 3210/** 3211 * ieee80211_proberesp_get - retrieve a Probe Response template 3212 * @hw: pointer obtained from ieee80211_alloc_hw(). 3213 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3214 * 3215 * Creates a Probe Response template which can, for example, be uploaded to 3216 * hardware. The destination address should be set by the caller. 3217 * 3218 * Can only be called in AP mode. 3219 * 3220 * Return: The Probe Response template. %NULL on error. 3221 */ 3222struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3223 struct ieee80211_vif *vif); 3224 3225/** 3226 * ieee80211_pspoll_get - retrieve a PS Poll template 3227 * @hw: pointer obtained from ieee80211_alloc_hw(). 3228 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3229 * 3230 * Creates a PS Poll a template which can, for example, uploaded to 3231 * hardware. The template must be updated after association so that correct 3232 * AID, BSSID and MAC address is used. 3233 * 3234 * Note: Caller (or hardware) is responsible for setting the 3235 * &IEEE80211_FCTL_PM bit. 3236 * 3237 * Return: The PS Poll template. %NULL on error. 3238 */ 3239struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3240 struct ieee80211_vif *vif); 3241 3242/** 3243 * ieee80211_nullfunc_get - retrieve a nullfunc template 3244 * @hw: pointer obtained from ieee80211_alloc_hw(). 3245 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3246 * 3247 * Creates a Nullfunc template which can, for example, uploaded to 3248 * hardware. The template must be updated after association so that correct 3249 * BSSID and address is used. 3250 * 3251 * Note: Caller (or hardware) is responsible for setting the 3252 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3253 * 3254 * Return: The nullfunc template. %NULL on error. 3255 */ 3256struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3257 struct ieee80211_vif *vif); 3258 3259/** 3260 * ieee80211_probereq_get - retrieve a Probe Request template 3261 * @hw: pointer obtained from ieee80211_alloc_hw(). 3262 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3263 * @ssid: SSID buffer 3264 * @ssid_len: length of SSID 3265 * @tailroom: tailroom to reserve at end of SKB for IEs 3266 * 3267 * Creates a Probe Request template which can, for example, be uploaded to 3268 * hardware. 3269 * 3270 * Return: The Probe Request template. %NULL on error. 3271 */ 3272struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3273 struct ieee80211_vif *vif, 3274 const u8 *ssid, size_t ssid_len, 3275 size_t tailroom); 3276 3277/** 3278 * ieee80211_rts_get - RTS 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 RTS. 3282 * @frame_len: the frame length (in octets). 3283 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3284 * @rts: The buffer where to store the RTS frame. 3285 * 3286 * If the RTS 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 RTS frame from the 802.11 code. The low-level is responsible 3289 * for calling this function before and RTS frame is needed. 3290 */ 3291void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3292 const void *frame, size_t frame_len, 3293 const struct ieee80211_tx_info *frame_txctl, 3294 struct ieee80211_rts *rts); 3295 3296/** 3297 * ieee80211_rts_duration - Get the duration field for an RTS frame 3298 * @hw: pointer obtained from ieee80211_alloc_hw(). 3299 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3300 * @frame_len: the length of the frame that is going to be protected by the RTS. 3301 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3302 * 3303 * If the RTS is generated in firmware, but the host system must provide 3304 * the duration field, the low-level driver uses this function to receive 3305 * the duration field value in little-endian byteorder. 3306 * 3307 * Return: The duration. 3308 */ 3309__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3310 struct ieee80211_vif *vif, size_t frame_len, 3311 const struct ieee80211_tx_info *frame_txctl); 3312 3313/** 3314 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3315 * @hw: pointer obtained from ieee80211_alloc_hw(). 3316 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3317 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3318 * @frame_len: the frame length (in octets). 3319 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3320 * @cts: The buffer where to store the CTS-to-self frame. 3321 * 3322 * If the CTS-to-self frames are generated by the host system (i.e., not in 3323 * hardware/firmware), the low-level driver uses this function to receive 3324 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3325 * for calling this function before and CTS-to-self frame is needed. 3326 */ 3327void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3328 struct ieee80211_vif *vif, 3329 const void *frame, size_t frame_len, 3330 const struct ieee80211_tx_info *frame_txctl, 3331 struct ieee80211_cts *cts); 3332 3333/** 3334 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3335 * @hw: pointer obtained from ieee80211_alloc_hw(). 3336 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3337 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3338 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3339 * 3340 * If the CTS-to-self is generated in firmware, but the host system must provide 3341 * the duration field, the low-level driver uses this function to receive 3342 * the duration field value in little-endian byteorder. 3343 * 3344 * Return: The duration. 3345 */ 3346__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3347 struct ieee80211_vif *vif, 3348 size_t frame_len, 3349 const struct ieee80211_tx_info *frame_txctl); 3350 3351/** 3352 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3353 * @hw: pointer obtained from ieee80211_alloc_hw(). 3354 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3355 * @band: the band to calculate the frame duration on 3356 * @frame_len: the length of the frame. 3357 * @rate: the rate at which the frame is going to be transmitted. 3358 * 3359 * Calculate the duration field of some generic frame, given its 3360 * length and transmission rate (in 100kbps). 3361 * 3362 * Return: The duration. 3363 */ 3364__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3365 struct ieee80211_vif *vif, 3366 enum ieee80211_band band, 3367 size_t frame_len, 3368 struct ieee80211_rate *rate); 3369 3370/** 3371 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3372 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3373 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3374 * 3375 * Function for accessing buffered broadcast and multicast frames. If 3376 * hardware/firmware does not implement buffering of broadcast/multicast 3377 * frames when power saving is used, 802.11 code buffers them in the host 3378 * memory. The low-level driver uses this function to fetch next buffered 3379 * frame. In most cases, this is used when generating beacon frame. 3380 * 3381 * Return: A pointer to the next buffered skb or NULL if no more buffered 3382 * frames are available. 3383 * 3384 * Note: buffered frames are returned only after DTIM beacon frame was 3385 * generated with ieee80211_beacon_get() and the low-level driver must thus 3386 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3387 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3388 * does not need to check for DTIM beacons separately and should be able to 3389 * use common code for all beacons. 3390 */ 3391struct sk_buff * 3392ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3393 3394/** 3395 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3396 * 3397 * This function returns the TKIP phase 1 key for the given IV32. 3398 * 3399 * @keyconf: the parameter passed with the set key 3400 * @iv32: IV32 to get the P1K for 3401 * @p1k: a buffer to which the key will be written, as 5 u16 values 3402 */ 3403void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3404 u32 iv32, u16 *p1k); 3405 3406/** 3407 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3408 * 3409 * This function returns the TKIP phase 1 key for the IV32 taken 3410 * from the given packet. 3411 * 3412 * @keyconf: the parameter passed with the set key 3413 * @skb: the packet to take the IV32 value from that will be encrypted 3414 * with this P1K 3415 * @p1k: a buffer to which the key will be written, as 5 u16 values 3416 */ 3417static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3418 struct sk_buff *skb, u16 *p1k) 3419{ 3420 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3421 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3422 u32 iv32 = get_unaligned_le32(&data[4]); 3423 3424 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3425} 3426 3427/** 3428 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3429 * 3430 * This function returns the TKIP phase 1 key for the given IV32 3431 * and transmitter address. 3432 * 3433 * @keyconf: the parameter passed with the set key 3434 * @ta: TA that will be used with the key 3435 * @iv32: IV32 to get the P1K for 3436 * @p1k: a buffer to which the key will be written, as 5 u16 values 3437 */ 3438void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3439 const u8 *ta, u32 iv32, u16 *p1k); 3440 3441/** 3442 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3443 * 3444 * This function computes the TKIP RC4 key for the IV values 3445 * in the packet. 3446 * 3447 * @keyconf: the parameter passed with the set key 3448 * @skb: the packet to take the IV32/IV16 values from that will be 3449 * encrypted with this key 3450 * @p2k: a buffer to which the key will be written, 16 bytes 3451 */ 3452void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3453 struct sk_buff *skb, u8 *p2k); 3454 3455/** 3456 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3457 * 3458 * This function computes the two AES-CMAC sub-keys, based on the 3459 * previously installed master key. 3460 * 3461 * @keyconf: the parameter passed with the set key 3462 * @k1: a buffer to be filled with the 1st sub-key 3463 * @k2: a buffer to be filled with the 2nd sub-key 3464 */ 3465void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3466 u8 *k1, u8 *k2); 3467 3468/** 3469 * struct ieee80211_key_seq - key sequence counter 3470 * 3471 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3472 * @ccmp: PN data, most significant byte first (big endian, 3473 * reverse order than in packet) 3474 * @aes_cmac: PN data, most significant byte first (big endian, 3475 * reverse order than in packet) 3476 */ 3477struct ieee80211_key_seq { 3478 union { 3479 struct { 3480 u32 iv32; 3481 u16 iv16; 3482 } tkip; 3483 struct { 3484 u8 pn[6]; 3485 } ccmp; 3486 struct { 3487 u8 pn[6]; 3488 } aes_cmac; 3489 }; 3490}; 3491 3492/** 3493 * ieee80211_get_key_tx_seq - get key TX sequence counter 3494 * 3495 * @keyconf: the parameter passed with the set key 3496 * @seq: buffer to receive the sequence data 3497 * 3498 * This function allows a driver to retrieve the current TX IV/PN 3499 * for the given key. It must not be called if IV generation is 3500 * offloaded to the device. 3501 * 3502 * Note that this function may only be called when no TX processing 3503 * can be done concurrently, for example when queues are stopped 3504 * and the stop has been synchronized. 3505 */ 3506void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3507 struct ieee80211_key_seq *seq); 3508 3509/** 3510 * ieee80211_get_key_rx_seq - get key RX sequence counter 3511 * 3512 * @keyconf: the parameter passed with the set key 3513 * @tid: The TID, or -1 for the management frame value (CCMP only); 3514 * the value on TID 0 is also used for non-QoS frames. For 3515 * CMAC, only TID 0 is valid. 3516 * @seq: buffer to receive the sequence data 3517 * 3518 * This function allows a driver to retrieve the current RX IV/PNs 3519 * for the given key. It must not be called if IV checking is done 3520 * by the device and not by mac80211. 3521 * 3522 * Note that this function may only be called when no RX processing 3523 * can be done concurrently. 3524 */ 3525void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3526 int tid, struct ieee80211_key_seq *seq); 3527 3528/** 3529 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3530 * @vif: virtual interface the rekeying was done on 3531 * @bssid: The BSSID of the AP, for checking association 3532 * @replay_ctr: the new replay counter after GTK rekeying 3533 * @gfp: allocation flags 3534 */ 3535void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3536 const u8 *replay_ctr, gfp_t gfp); 3537 3538/** 3539 * ieee80211_wake_queue - wake specific queue 3540 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3541 * @queue: queue number (counted from zero). 3542 * 3543 * Drivers should use this function instead of netif_wake_queue. 3544 */ 3545void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3546 3547/** 3548 * ieee80211_stop_queue - stop specific queue 3549 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3550 * @queue: queue number (counted from zero). 3551 * 3552 * Drivers should use this function instead of netif_stop_queue. 3553 */ 3554void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3555 3556/** 3557 * ieee80211_queue_stopped - test status of the queue 3558 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3559 * @queue: queue number (counted from zero). 3560 * 3561 * Drivers should use this function instead of netif_stop_queue. 3562 * 3563 * Return: %true if the queue is stopped. %false otherwise. 3564 */ 3565 3566int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3567 3568/** 3569 * ieee80211_stop_queues - stop all queues 3570 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3571 * 3572 * Drivers should use this function instead of netif_stop_queue. 3573 */ 3574void ieee80211_stop_queues(struct ieee80211_hw *hw); 3575 3576/** 3577 * ieee80211_wake_queues - wake all queues 3578 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3579 * 3580 * Drivers should use this function instead of netif_wake_queue. 3581 */ 3582void ieee80211_wake_queues(struct ieee80211_hw *hw); 3583 3584/** 3585 * ieee80211_scan_completed - completed hardware scan 3586 * 3587 * When hardware scan offload is used (i.e. the hw_scan() callback is 3588 * assigned) this function needs to be called by the driver to notify 3589 * mac80211 that the scan finished. This function can be called from 3590 * any context, including hardirq context. 3591 * 3592 * @hw: the hardware that finished the scan 3593 * @aborted: set to true if scan was aborted 3594 */ 3595void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3596 3597/** 3598 * ieee80211_sched_scan_results - got results from scheduled scan 3599 * 3600 * When a scheduled scan is running, this function needs to be called by the 3601 * driver whenever there are new scan results available. 3602 * 3603 * @hw: the hardware that is performing scheduled scans 3604 */ 3605void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3606 3607/** 3608 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3609 * 3610 * When a scheduled scan is running, this function can be called by 3611 * the driver if it needs to stop the scan to perform another task. 3612 * Usual scenarios are drivers that cannot continue the scheduled scan 3613 * while associating, for instance. 3614 * 3615 * @hw: the hardware that is performing scheduled scans 3616 */ 3617void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3618 3619/** 3620 * enum ieee80211_interface_iteration_flags - interface iteration flags 3621 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3622 * been added to the driver; However, note that during hardware 3623 * reconfiguration (after restart_hw) it will iterate over a new 3624 * interface and over all the existing interfaces even if they 3625 * haven't been re-added to the driver yet. 3626 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3627 * interfaces, even if they haven't been re-added to the driver yet. 3628 */ 3629enum ieee80211_interface_iteration_flags { 3630 IEEE80211_IFACE_ITER_NORMAL = 0, 3631 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3632}; 3633 3634/** 3635 * ieee80211_iterate_active_interfaces - iterate active interfaces 3636 * 3637 * This function iterates over the interfaces associated with a given 3638 * hardware that are currently active and calls the callback for them. 3639 * This function allows the iterator function to sleep, when the iterator 3640 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3641 * be used. 3642 * Does not iterate over a new interface during add_interface(). 3643 * 3644 * @hw: the hardware struct of which the interfaces should be iterated over 3645 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3646 * @iterator: the iterator function to call 3647 * @data: first argument of the iterator function 3648 */ 3649void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3650 u32 iter_flags, 3651 void (*iterator)(void *data, u8 *mac, 3652 struct ieee80211_vif *vif), 3653 void *data); 3654 3655/** 3656 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3657 * 3658 * This function iterates over the interfaces associated with a given 3659 * hardware that are currently active and calls the callback for them. 3660 * This function requires the iterator callback function to be atomic, 3661 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3662 * Does not iterate over a new interface during add_interface(). 3663 * 3664 * @hw: the hardware struct of which the interfaces should be iterated over 3665 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3666 * @iterator: the iterator function to call, cannot sleep 3667 * @data: first argument of the iterator function 3668 */ 3669void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3670 u32 iter_flags, 3671 void (*iterator)(void *data, 3672 u8 *mac, 3673 struct ieee80211_vif *vif), 3674 void *data); 3675 3676/** 3677 * ieee80211_queue_work - add work onto the mac80211 workqueue 3678 * 3679 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3680 * This helper ensures drivers are not queueing work when they should not be. 3681 * 3682 * @hw: the hardware struct for the interface we are adding work for 3683 * @work: the work we want to add onto the mac80211 workqueue 3684 */ 3685void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3686 3687/** 3688 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3689 * 3690 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3691 * workqueue. 3692 * 3693 * @hw: the hardware struct for the interface we are adding work for 3694 * @dwork: delayable work to queue onto the mac80211 workqueue 3695 * @delay: number of jiffies to wait before queueing 3696 */ 3697void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3698 struct delayed_work *dwork, 3699 unsigned long delay); 3700 3701/** 3702 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3703 * @sta: the station for which to start a BA session 3704 * @tid: the TID to BA on. 3705 * @timeout: session timeout value (in TUs) 3706 * 3707 * Return: success if addBA request was sent, failure otherwise 3708 * 3709 * Although mac80211/low level driver/user space application can estimate 3710 * the need to start aggregation on a certain RA/TID, the session level 3711 * will be managed by the mac80211. 3712 */ 3713int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3714 u16 timeout); 3715 3716/** 3717 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3718 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3719 * @ra: receiver address of the BA session recipient. 3720 * @tid: the TID to BA on. 3721 * 3722 * This function must be called by low level driver once it has 3723 * finished with preparations for the BA session. It can be called 3724 * from any context. 3725 */ 3726void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3727 u16 tid); 3728 3729/** 3730 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3731 * @sta: the station whose BA session to stop 3732 * @tid: the TID to stop BA. 3733 * 3734 * Return: negative error if the TID is invalid, or no aggregation active 3735 * 3736 * Although mac80211/low level driver/user space application can estimate 3737 * the need to stop aggregation on a certain RA/TID, the session level 3738 * will be managed by the mac80211. 3739 */ 3740int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3741 3742/** 3743 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3744 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3745 * @ra: receiver address of the BA session recipient. 3746 * @tid: the desired TID to BA on. 3747 * 3748 * This function must be called by low level driver once it has 3749 * finished with preparations for the BA session tear down. It 3750 * can be called from any context. 3751 */ 3752void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3753 u16 tid); 3754 3755/** 3756 * ieee80211_find_sta - find a station 3757 * 3758 * @vif: virtual interface to look for station on 3759 * @addr: station's address 3760 * 3761 * Return: The station, if found. %NULL otherwise. 3762 * 3763 * Note: This function must be called under RCU lock and the 3764 * resulting pointer is only valid under RCU lock as well. 3765 */ 3766struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3767 const u8 *addr); 3768 3769/** 3770 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3771 * 3772 * @hw: pointer as obtained from ieee80211_alloc_hw() 3773 * @addr: remote station's address 3774 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3775 * 3776 * Return: The station, if found. %NULL otherwise. 3777 * 3778 * Note: This function must be called under RCU lock and the 3779 * resulting pointer is only valid under RCU lock as well. 3780 * 3781 * NOTE: You may pass NULL for localaddr, but then you will just get 3782 * the first STA that matches the remote address 'addr'. 3783 * We can have multiple STA associated with multiple 3784 * logical stations (e.g. consider a station connecting to another 3785 * BSSID on the same AP hardware without disconnecting first). 3786 * In this case, the result of this method with localaddr NULL 3787 * is not reliable. 3788 * 3789 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3790 */ 3791struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3792 const u8 *addr, 3793 const u8 *localaddr); 3794 3795/** 3796 * ieee80211_sta_block_awake - block station from waking up 3797 * @hw: the hardware 3798 * @pubsta: the station 3799 * @block: whether to block or unblock 3800 * 3801 * Some devices require that all frames that are on the queues 3802 * for a specific station that went to sleep are flushed before 3803 * a poll response or frames after the station woke up can be 3804 * delivered to that it. Note that such frames must be rejected 3805 * by the driver as filtered, with the appropriate status flag. 3806 * 3807 * This function allows implementing this mode in a race-free 3808 * manner. 3809 * 3810 * To do this, a driver must keep track of the number of frames 3811 * still enqueued for a specific station. If this number is not 3812 * zero when the station goes to sleep, the driver must call 3813 * this function to force mac80211 to consider the station to 3814 * be asleep regardless of the station's actual state. Once the 3815 * number of outstanding frames reaches zero, the driver must 3816 * call this function again to unblock the station. That will 3817 * cause mac80211 to be able to send ps-poll responses, and if 3818 * the station queried in the meantime then frames will also 3819 * be sent out as a result of this. Additionally, the driver 3820 * will be notified that the station woke up some time after 3821 * it is unblocked, regardless of whether the station actually 3822 * woke up while blocked or not. 3823 */ 3824void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3825 struct ieee80211_sta *pubsta, bool block); 3826 3827/** 3828 * ieee80211_sta_eosp - notify mac80211 about end of SP 3829 * @pubsta: the station 3830 * 3831 * When a device transmits frames in a way that it can't tell 3832 * mac80211 in the TX status about the EOSP, it must clear the 3833 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3834 * This applies for PS-Poll as well as uAPSD. 3835 * 3836 * Note that there is no non-_irqsafe version right now as 3837 * it wasn't needed, but just like _tx_status() and _rx() 3838 * must not be mixed in irqsafe/non-irqsafe versions, this 3839 * function must not be mixed with those either. Use the 3840 * all irqsafe, or all non-irqsafe, don't mix! If you need 3841 * the non-irqsafe version of this, you need to add it. 3842 */ 3843void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3844 3845/** 3846 * ieee80211_iter_keys - iterate keys programmed into the device 3847 * @hw: pointer obtained from ieee80211_alloc_hw() 3848 * @vif: virtual interface to iterate, may be %NULL for all 3849 * @iter: iterator function that will be called for each key 3850 * @iter_data: custom data to pass to the iterator function 3851 * 3852 * This function can be used to iterate all the keys known to 3853 * mac80211, even those that weren't previously programmed into 3854 * the device. This is intended for use in WoWLAN if the device 3855 * needs reprogramming of the keys during suspend. Note that due 3856 * to locking reasons, it is also only safe to call this at few 3857 * spots since it must hold the RTNL and be able to sleep. 3858 * 3859 * The order in which the keys are iterated matches the order 3860 * in which they were originally installed and handed to the 3861 * set_key callback. 3862 */ 3863void ieee80211_iter_keys(struct ieee80211_hw *hw, 3864 struct ieee80211_vif *vif, 3865 void (*iter)(struct ieee80211_hw *hw, 3866 struct ieee80211_vif *vif, 3867 struct ieee80211_sta *sta, 3868 struct ieee80211_key_conf *key, 3869 void *data), 3870 void *iter_data); 3871 3872/** 3873 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 3874 * @hw: pointre obtained from ieee80211_alloc_hw(). 3875 * @iter: iterator function 3876 * @iter_data: data passed to iterator function 3877 * 3878 * Iterate all active channel contexts. This function is atomic and 3879 * doesn't acquire any locks internally that might be held in other 3880 * places while calling into the driver. 3881 * 3882 * The iterator will not find a context that's being added (during 3883 * the driver callback to add it) but will find it while it's being 3884 * removed. 3885 * 3886 * Note that during hardware restart, all contexts that existed 3887 * before the restart are considered already present so will be 3888 * found while iterating, whether they've been re-added already 3889 * or not. 3890 */ 3891void ieee80211_iter_chan_contexts_atomic( 3892 struct ieee80211_hw *hw, 3893 void (*iter)(struct ieee80211_hw *hw, 3894 struct ieee80211_chanctx_conf *chanctx_conf, 3895 void *data), 3896 void *iter_data); 3897 3898/** 3899 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3900 * @hw: pointer obtained from ieee80211_alloc_hw(). 3901 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3902 * 3903 * Creates a Probe Request template which can, for example, be uploaded to 3904 * hardware. The template is filled with bssid, ssid and supported rate 3905 * information. This function must only be called from within the 3906 * .bss_info_changed callback function and only in managed mode. The function 3907 * is only useful when the interface is associated, otherwise it will return 3908 * %NULL. 3909 * 3910 * Return: The Probe Request template. %NULL on error. 3911 */ 3912struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3913 struct ieee80211_vif *vif); 3914 3915/** 3916 * ieee80211_beacon_loss - inform hardware does not receive beacons 3917 * 3918 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3919 * 3920 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3921 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3922 * hardware is not receiving beacons with this function. 3923 */ 3924void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3925 3926/** 3927 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3928 * 3929 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3930 * 3931 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3932 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3933 * needs to inform if the connection to the AP has been lost. 3934 * The function may also be called if the connection needs to be terminated 3935 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 3936 * 3937 * This function will cause immediate change to disassociated state, 3938 * without connection recovery attempts. 3939 */ 3940void ieee80211_connection_loss(struct ieee80211_vif *vif); 3941 3942/** 3943 * ieee80211_resume_disconnect - disconnect from AP after resume 3944 * 3945 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3946 * 3947 * Instructs mac80211 to disconnect from the AP after resume. 3948 * Drivers can use this after WoWLAN if they know that the 3949 * connection cannot be kept up, for example because keys were 3950 * used while the device was asleep but the replay counters or 3951 * similar cannot be retrieved from the device during resume. 3952 * 3953 * Note that due to implementation issues, if the driver uses 3954 * the reconfiguration functionality during resume the interface 3955 * will still be added as associated first during resume and then 3956 * disconnect normally later. 3957 * 3958 * This function can only be called from the resume callback and 3959 * the driver must not be holding any of its own locks while it 3960 * calls this function, or at least not any locks it needs in the 3961 * key configuration paths (if it supports HW crypto). 3962 */ 3963void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3964 3965/** 3966 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3967 * rssi threshold triggered 3968 * 3969 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3970 * @rssi_event: the RSSI trigger event type 3971 * @gfp: context flags 3972 * 3973 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3974 * monitoring is configured with an rssi threshold, the driver will inform 3975 * whenever the rssi level reaches the threshold. 3976 */ 3977void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3978 enum nl80211_cqm_rssi_threshold_event rssi_event, 3979 gfp_t gfp); 3980 3981/** 3982 * ieee80211_radar_detected - inform that a radar was detected 3983 * 3984 * @hw: pointer as obtained from ieee80211_alloc_hw() 3985 */ 3986void ieee80211_radar_detected(struct ieee80211_hw *hw); 3987 3988/** 3989 * ieee80211_chswitch_done - Complete channel switch process 3990 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3991 * @success: make the channel switch successful or not 3992 * 3993 * Complete the channel switch post-process: set the new operational channel 3994 * and wake up the suspended queues. 3995 */ 3996void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3997 3998/** 3999 * ieee80211_request_smps - request SM PS transition 4000 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4001 * @smps_mode: new SM PS mode 4002 * 4003 * This allows the driver to request an SM PS transition in managed 4004 * mode. This is useful when the driver has more information than 4005 * the stack about possible interference, for example by bluetooth. 4006 */ 4007void ieee80211_request_smps(struct ieee80211_vif *vif, 4008 enum ieee80211_smps_mode smps_mode); 4009 4010/** 4011 * ieee80211_ready_on_channel - notification of remain-on-channel start 4012 * @hw: pointer as obtained from ieee80211_alloc_hw() 4013 */ 4014void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4015 4016/** 4017 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4018 * @hw: pointer as obtained from ieee80211_alloc_hw() 4019 */ 4020void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4021 4022/** 4023 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4024 * 4025 * in order not to harm the system performance and user experience, the device 4026 * may request not to allow any rx ba session and tear down existing rx ba 4027 * sessions based on system constraints such as periodic BT activity that needs 4028 * to limit wlan activity (eg.sco or a2dp)." 4029 * in such cases, the intention is to limit the duration of the rx ppdu and 4030 * therefore prevent the peer device to use a-mpdu aggregation. 4031 * 4032 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4033 * @ba_rx_bitmap: Bit map of open rx ba per tid 4034 * @addr: & to bssid mac address 4035 */ 4036void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4037 const u8 *addr); 4038 4039/** 4040 * ieee80211_send_bar - send a BlockAckReq frame 4041 * 4042 * can be used to flush pending frames from the peer's aggregation reorder 4043 * buffer. 4044 * 4045 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4046 * @ra: the peer's destination address 4047 * @tid: the TID of the aggregation session 4048 * @ssn: the new starting sequence number for the receiver 4049 */ 4050void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4051 4052/* Rate control API */ 4053 4054/** 4055 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4056 * 4057 * @hw: The hardware the algorithm is invoked for. 4058 * @sband: The band this frame is being transmitted on. 4059 * @bss_conf: the current BSS configuration 4060 * @skb: the skb that will be transmitted, the control information in it needs 4061 * to be filled in 4062 * @reported_rate: The rate control algorithm can fill this in to indicate 4063 * which rate should be reported to userspace as the current rate and 4064 * used for rate calculations in the mesh network. 4065 * @rts: whether RTS will be used for this frame because it is longer than the 4066 * RTS threshold 4067 * @short_preamble: whether mac80211 will request short-preamble transmission 4068 * if the selected rate supports it 4069 * @max_rate_idx: user-requested maximum (legacy) rate 4070 * (deprecated; this will be removed once drivers get updated to use 4071 * rate_idx_mask) 4072 * @rate_idx_mask: user-requested (legacy) rate mask 4073 * @rate_idx_mcs_mask: user-requested MCS rate mask 4074 * @bss: whether this frame is sent out in AP or IBSS mode 4075 */ 4076struct ieee80211_tx_rate_control { 4077 struct ieee80211_hw *hw; 4078 struct ieee80211_supported_band *sband; 4079 struct ieee80211_bss_conf *bss_conf; 4080 struct sk_buff *skb; 4081 struct ieee80211_tx_rate reported_rate; 4082 bool rts, short_preamble; 4083 u8 max_rate_idx; 4084 u32 rate_idx_mask; 4085 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 4086 bool bss; 4087}; 4088 4089struct rate_control_ops { 4090 struct module *module; 4091 const char *name; 4092 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4093 void (*free)(void *priv); 4094 4095 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4096 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4097 struct ieee80211_sta *sta, void *priv_sta); 4098 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4099 struct ieee80211_sta *sta, void *priv_sta, 4100 u32 changed); 4101 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4102 void *priv_sta); 4103 4104 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4105 struct ieee80211_sta *sta, void *priv_sta, 4106 struct sk_buff *skb); 4107 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4108 struct ieee80211_tx_rate_control *txrc); 4109 4110 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4111 struct dentry *dir); 4112 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4113}; 4114 4115static inline int rate_supported(struct ieee80211_sta *sta, 4116 enum ieee80211_band band, 4117 int index) 4118{ 4119 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4120} 4121 4122/** 4123 * rate_control_send_low - helper for drivers for management/no-ack frames 4124 * 4125 * Rate control algorithms that agree to use the lowest rate to 4126 * send management frames and NO_ACK data with the respective hw 4127 * retries should use this in the beginning of their mac80211 get_rate 4128 * callback. If true is returned the rate control can simply return. 4129 * If false is returned we guarantee that sta and sta and priv_sta is 4130 * not null. 4131 * 4132 * Rate control algorithms wishing to do more intelligent selection of 4133 * rate for multicast/broadcast frames may choose to not use this. 4134 * 4135 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4136 * that this may be null. 4137 * @priv_sta: private rate control structure. This may be null. 4138 * @txrc: rate control information we sholud populate for mac80211. 4139 */ 4140bool rate_control_send_low(struct ieee80211_sta *sta, 4141 void *priv_sta, 4142 struct ieee80211_tx_rate_control *txrc); 4143 4144 4145static inline s8 4146rate_lowest_index(struct ieee80211_supported_band *sband, 4147 struct ieee80211_sta *sta) 4148{ 4149 int i; 4150 4151 for (i = 0; i < sband->n_bitrates; i++) 4152 if (rate_supported(sta, sband->band, i)) 4153 return i; 4154 4155 /* warn when we cannot find a rate. */ 4156 WARN_ON_ONCE(1); 4157 4158 /* and return 0 (the lowest index) */ 4159 return 0; 4160} 4161 4162static inline 4163bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4164 struct ieee80211_sta *sta) 4165{ 4166 unsigned int i; 4167 4168 for (i = 0; i < sband->n_bitrates; i++) 4169 if (rate_supported(sta, sband->band, i)) 4170 return true; 4171 return false; 4172} 4173 4174int ieee80211_rate_control_register(struct rate_control_ops *ops); 4175void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4176 4177static inline bool 4178conf_is_ht20(struct ieee80211_conf *conf) 4179{ 4180 return conf->channel_type == NL80211_CHAN_HT20; 4181} 4182 4183static inline bool 4184conf_is_ht40_minus(struct ieee80211_conf *conf) 4185{ 4186 return conf->channel_type == NL80211_CHAN_HT40MINUS; 4187} 4188 4189static inline bool 4190conf_is_ht40_plus(struct ieee80211_conf *conf) 4191{ 4192 return conf->channel_type == NL80211_CHAN_HT40PLUS; 4193} 4194 4195static inline bool 4196conf_is_ht40(struct ieee80211_conf *conf) 4197{ 4198 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 4199} 4200 4201static inline bool 4202conf_is_ht(struct ieee80211_conf *conf) 4203{ 4204 return conf->channel_type != NL80211_CHAN_NO_HT; 4205} 4206 4207static inline enum nl80211_iftype 4208ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4209{ 4210 if (p2p) { 4211 switch (type) { 4212 case NL80211_IFTYPE_STATION: 4213 return NL80211_IFTYPE_P2P_CLIENT; 4214 case NL80211_IFTYPE_AP: 4215 return NL80211_IFTYPE_P2P_GO; 4216 default: 4217 break; 4218 } 4219 } 4220 return type; 4221} 4222 4223static inline enum nl80211_iftype 4224ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4225{ 4226 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4227} 4228 4229void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4230 int rssi_min_thold, 4231 int rssi_max_thold); 4232 4233void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4234 4235/** 4236 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4237 * 4238 * @vif: the specified virtual interface 4239 * 4240 * Note: This function assumes that the given vif is valid. 4241 * 4242 * Return: The average RSSI value for the requested interface, or 0 if not 4243 * applicable. 4244 */ 4245int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4246 4247/** 4248 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4249 * @vif: virtual interface 4250 * @wakeup: wakeup reason(s) 4251 * @gfp: allocation flags 4252 * 4253 * See cfg80211_report_wowlan_wakeup(). 4254 */ 4255void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4256 struct cfg80211_wowlan_wakeup *wakeup, 4257 gfp_t gfp); 4258 4259#endif /* MAC80211_H */ 4260