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 90 struct device; 91 92 /** 93 * enum ieee80211_max_queues - maximum number of queues 94 * 95 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 96 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 97 */ 98 enum ieee80211_max_queues { 99 IEEE80211_MAX_QUEUES = 16, 100 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 101 }; 102 103 #define IEEE80211_INVAL_HW_QUEUE 0xff 104 105 /** 106 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 107 * @IEEE80211_AC_VO: voice 108 * @IEEE80211_AC_VI: video 109 * @IEEE80211_AC_BE: best effort 110 * @IEEE80211_AC_BK: background 111 */ 112 enum ieee80211_ac_numbers { 113 IEEE80211_AC_VO = 0, 114 IEEE80211_AC_VI = 1, 115 IEEE80211_AC_BE = 2, 116 IEEE80211_AC_BK = 3, 117 }; 118 #define IEEE80211_NUM_ACS 4 119 120 /** 121 * struct ieee80211_tx_queue_params - transmit queue configuration 122 * 123 * The information provided in this structure is required for QoS 124 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 125 * 126 * @aifs: arbitration interframe space [0..255] 127 * @cw_min: minimum contention window [a value of the form 128 * 2^n-1 in the range 1..32767] 129 * @cw_max: maximum contention window [like @cw_min] 130 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 131 * @acm: is mandatory admission control required for the access category 132 * @uapsd: is U-APSD mode enabled for the queue 133 */ 134 struct ieee80211_tx_queue_params { 135 u16 txop; 136 u16 cw_min; 137 u16 cw_max; 138 u8 aifs; 139 bool acm; 140 bool uapsd; 141 }; 142 143 struct ieee80211_low_level_stats { 144 unsigned int dot11ACKFailureCount; 145 unsigned int dot11RTSFailureCount; 146 unsigned int dot11FCSErrorCount; 147 unsigned int dot11RTSSuccessCount; 148 }; 149 150 /** 151 * enum ieee80211_chanctx_change - change flag for channel context 152 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 153 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 154 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 155 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 156 * this is used only with channel switching with CSA 157 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 158 */ 159 enum ieee80211_chanctx_change { 160 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 161 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 162 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 163 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 164 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 165 }; 166 167 /** 168 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 169 * 170 * This is the driver-visible part. The ieee80211_chanctx 171 * that contains it is visible in mac80211 only. 172 * 173 * @def: the channel definition 174 * @min_def: the minimum channel definition currently required. 175 * @rx_chains_static: The number of RX chains that must always be 176 * active on the channel to receive MIMO transmissions 177 * @rx_chains_dynamic: The number of RX chains that must be enabled 178 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 179 * this will always be >= @rx_chains_static. 180 * @radar_enabled: whether radar detection is enabled on this channel. 181 * @drv_priv: data area for driver use, will always be aligned to 182 * sizeof(void *), size is determined in hw information. 183 */ 184 struct ieee80211_chanctx_conf { 185 struct cfg80211_chan_def def; 186 struct cfg80211_chan_def min_def; 187 188 u8 rx_chains_static, rx_chains_dynamic; 189 190 bool radar_enabled; 191 192 u8 drv_priv[0] __aligned(sizeof(void *)); 193 }; 194 195 /** 196 * enum ieee80211_bss_change - BSS change notification flags 197 * 198 * These flags are used with the bss_info_changed() callback 199 * to indicate which BSS parameter changed. 200 * 201 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 202 * also implies a change in the AID. 203 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 204 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 205 * @BSS_CHANGED_ERP_SLOT: slot timing changed 206 * @BSS_CHANGED_HT: 802.11n parameters changed 207 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 208 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 209 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 210 * reason (IBSS and managed mode) 211 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 212 * new beacon (beaconing modes) 213 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 214 * enabled/disabled (beaconing modes) 215 * @BSS_CHANGED_CQM: Connection quality monitor config changed 216 * @BSS_CHANGED_IBSS: IBSS join status changed 217 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 218 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 219 * that it is only ever disabled for station mode. 220 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 221 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 222 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 223 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 224 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 225 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 226 * changed (currently only in P2P client mode, GO mode will be later) 227 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 228 * currently dtim_period only is under consideration. 229 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 230 * note that this is only called when it changes after the channel 231 * context had been assigned. 232 */ 233 enum ieee80211_bss_change { 234 BSS_CHANGED_ASSOC = 1<<0, 235 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 236 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 237 BSS_CHANGED_ERP_SLOT = 1<<3, 238 BSS_CHANGED_HT = 1<<4, 239 BSS_CHANGED_BASIC_RATES = 1<<5, 240 BSS_CHANGED_BEACON_INT = 1<<6, 241 BSS_CHANGED_BSSID = 1<<7, 242 BSS_CHANGED_BEACON = 1<<8, 243 BSS_CHANGED_BEACON_ENABLED = 1<<9, 244 BSS_CHANGED_CQM = 1<<10, 245 BSS_CHANGED_IBSS = 1<<11, 246 BSS_CHANGED_ARP_FILTER = 1<<12, 247 BSS_CHANGED_QOS = 1<<13, 248 BSS_CHANGED_IDLE = 1<<14, 249 BSS_CHANGED_SSID = 1<<15, 250 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 251 BSS_CHANGED_PS = 1<<17, 252 BSS_CHANGED_TXPOWER = 1<<18, 253 BSS_CHANGED_P2P_PS = 1<<19, 254 BSS_CHANGED_BEACON_INFO = 1<<20, 255 BSS_CHANGED_BANDWIDTH = 1<<21, 256 257 /* when adding here, make sure to change ieee80211_reconfig */ 258 }; 259 260 /* 261 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 262 * of addresses for an interface increase beyond this value, hardware ARP 263 * filtering will be disabled. 264 */ 265 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 266 267 /** 268 * enum ieee80211_rssi_event - RSSI threshold event 269 * An indicator for when RSSI goes below/above a certain threshold. 270 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 271 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 272 */ 273 enum ieee80211_rssi_event { 274 RSSI_EVENT_HIGH, 275 RSSI_EVENT_LOW, 276 }; 277 278 /** 279 * struct ieee80211_bss_conf - holds the BSS's changing parameters 280 * 281 * This structure keeps information about a BSS (and an association 282 * to that BSS) that can change during the lifetime of the BSS. 283 * 284 * @assoc: association status 285 * @ibss_joined: indicates whether this station is part of an IBSS 286 * or not 287 * @ibss_creator: indicates if a new IBSS network is being created 288 * @aid: association ID number, valid only when @assoc is true 289 * @use_cts_prot: use CTS protection 290 * @use_short_preamble: use 802.11b short preamble; 291 * if the hardware cannot handle this it must set the 292 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 293 * @use_short_slot: use short slot time (only relevant for ERP); 294 * if the hardware cannot handle this it must set the 295 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 296 * @dtim_period: num of beacons before the next DTIM, for beaconing, 297 * valid in station mode only if after the driver was notified 298 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 299 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 300 * as it may have been received during scanning long ago). If the 301 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 302 * only come from a beacon, but might not become valid until after 303 * association when a beacon is received (which is notified with the 304 * %BSS_CHANGED_DTIM flag.) 305 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 306 * the driver/device can use this to calculate synchronisation 307 * (see @sync_tsf) 308 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 309 * is requested, see @sync_tsf/@sync_device_ts. 310 * @beacon_int: beacon interval 311 * @assoc_capability: capabilities taken from assoc resp 312 * @basic_rates: bitmap of basic rates, each bit stands for an 313 * index into the rate table configured by the driver in 314 * the current band. 315 * @beacon_rate: associated AP's beacon TX rate 316 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 317 * @bssid: The BSSID for this BSS 318 * @enable_beacon: whether beaconing should be enabled or not 319 * @chandef: Channel definition for this BSS -- the hardware might be 320 * configured a higher bandwidth than this BSS uses, for example. 321 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 322 * This field is only valid when the channel type is one of the HT types. 323 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 324 * implies disabled 325 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 326 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 327 * may filter ARP queries targeted for other addresses than listed here. 328 * The driver must allow ARP queries targeted for all address listed here 329 * to pass through. An empty list implies no ARP queries need to pass. 330 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 331 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 332 * array size), it's up to the driver what to do in that case. 333 * @qos: This is a QoS-enabled BSS. 334 * @idle: This interface is idle. There's also a global idle flag in the 335 * hardware config which may be more appropriate depending on what 336 * your driver/device needs to do. 337 * @ps: power-save mode (STA only). This flag is NOT affected by 338 * offchannel/dynamic_ps operations. 339 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 340 * @ssid_len: Length of SSID given in @ssid. 341 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 342 * @txpower: TX power in dBm 343 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 344 */ 345 struct ieee80211_bss_conf { 346 const u8 *bssid; 347 /* association related data */ 348 bool assoc, ibss_joined; 349 bool ibss_creator; 350 u16 aid; 351 /* erp related data */ 352 bool use_cts_prot; 353 bool use_short_preamble; 354 bool use_short_slot; 355 bool enable_beacon; 356 u8 dtim_period; 357 u16 beacon_int; 358 u16 assoc_capability; 359 u64 sync_tsf; 360 u32 sync_device_ts; 361 u8 sync_dtim_count; 362 u32 basic_rates; 363 struct ieee80211_rate *beacon_rate; 364 int mcast_rate[IEEE80211_NUM_BANDS]; 365 u16 ht_operation_mode; 366 s32 cqm_rssi_thold; 367 u32 cqm_rssi_hyst; 368 struct cfg80211_chan_def chandef; 369 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 370 int arp_addr_cnt; 371 bool qos; 372 bool idle; 373 bool ps; 374 u8 ssid[IEEE80211_MAX_SSID_LEN]; 375 size_t ssid_len; 376 bool hidden_ssid; 377 int txpower; 378 struct ieee80211_p2p_noa_attr p2p_noa_attr; 379 }; 380 381 /** 382 * enum mac80211_tx_info_flags - flags to describe transmission information/status 383 * 384 * These flags are used with the @flags member of &ieee80211_tx_info. 385 * 386 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 387 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 388 * number to this frame, taking care of not overwriting the fragment 389 * number and increasing the sequence number only when the 390 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 391 * assign sequence numbers to QoS-data frames but cannot do so correctly 392 * for non-QoS-data and management frames because beacons need them from 393 * that counter as well and mac80211 cannot guarantee proper sequencing. 394 * If this flag is set, the driver should instruct the hardware to 395 * assign a sequence number to the frame or assign one itself. Cf. IEEE 396 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 397 * beacons and always be clear for frames without a sequence number field. 398 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 399 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 400 * station 401 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 402 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 403 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 404 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 405 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 406 * because the destination STA was in powersave mode. Note that to 407 * avoid race conditions, the filter must be set by the hardware or 408 * firmware upon receiving a frame that indicates that the station 409 * went to sleep (must be done on device to filter frames already on 410 * the queue) and may only be unset after mac80211 gives the OK for 411 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 412 * since only then is it guaranteed that no more frames are in the 413 * hardware queue. 414 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 415 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 416 * is for the whole aggregation. 417 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 418 * so consider using block ack request (BAR). 419 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 420 * set by rate control algorithms to indicate probe rate, will 421 * be cleared for fragmented frames (except on the last fragment) 422 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 423 * that a frame can be transmitted while the queues are stopped for 424 * off-channel operation. 425 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 426 * used to indicate that a pending frame requires TX processing before 427 * it can be sent out. 428 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 429 * used to indicate that a frame was already retried due to PS 430 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 431 * used to indicate frame should not be encrypted 432 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 433 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 434 * be sent although the station is in powersave mode. 435 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 436 * transmit function after the current frame, this can be used 437 * by drivers to kick the DMA queue only if unset or when the 438 * queue gets full. 439 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 440 * after TX status because the destination was asleep, it must not 441 * be modified again (no seqno assignment, crypto, etc.) 442 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 443 * code for connection establishment, this indicates that its status 444 * should kick the MLME state machine. 445 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 446 * MLME command (internal to mac80211 to figure out whether to send TX 447 * status to user space) 448 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 449 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 450 * frame and selects the maximum number of streams that it can use. 451 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 452 * the off-channel channel when a remain-on-channel offload is done 453 * in hardware -- normal packets still flow and are expected to be 454 * handled properly by the device. 455 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 456 * testing. It will be sent out with incorrect Michael MIC key to allow 457 * TKIP countermeasures to be tested. 458 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 459 * This flag is actually used for management frame especially for P2P 460 * frames not being sent at CCK rate in 2GHz band. 461 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 462 * when its status is reported the service period ends. For frames in 463 * an SP that mac80211 transmits, it is already set; for driver frames 464 * the driver may set this flag. It is also used to do the same for 465 * PS-Poll responses. 466 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 467 * This flag is used to send nullfunc frame at minimum rate when 468 * the nullfunc is used for connection monitoring purpose. 469 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 470 * would be fragmented by size (this is optional, only used for 471 * monitor injection). 472 * @IEEE80211_TX_CTL_PS_RESPONSE: This frame is a response to a poll 473 * frame (PS-Poll or uAPSD). 474 * 475 * Note: If you have to add new flags to the enumeration, then don't 476 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 477 */ 478 enum mac80211_tx_info_flags { 479 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 480 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 481 IEEE80211_TX_CTL_NO_ACK = BIT(2), 482 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 483 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 484 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 485 IEEE80211_TX_CTL_AMPDU = BIT(6), 486 IEEE80211_TX_CTL_INJECTED = BIT(7), 487 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 488 IEEE80211_TX_STAT_ACK = BIT(9), 489 IEEE80211_TX_STAT_AMPDU = BIT(10), 490 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 491 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 492 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 493 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 494 IEEE80211_TX_INTFL_RETRIED = BIT(15), 495 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 496 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 497 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 498 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 499 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 500 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 501 IEEE80211_TX_CTL_LDPC = BIT(22), 502 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 503 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 504 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 505 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 506 IEEE80211_TX_STATUS_EOSP = BIT(28), 507 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 508 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 509 IEEE80211_TX_CTL_PS_RESPONSE = BIT(31), 510 }; 511 512 #define IEEE80211_TX_CTL_STBC_SHIFT 23 513 514 /** 515 * enum mac80211_tx_control_flags - flags to describe transmit control 516 * 517 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 518 * protocol frame (e.g. EAP) 519 * 520 * These flags are used in tx_info->control.flags. 521 */ 522 enum mac80211_tx_control_flags { 523 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 524 }; 525 526 /* 527 * This definition is used as a mask to clear all temporary flags, which are 528 * set by the tx handlers for each transmission attempt by the mac80211 stack. 529 */ 530 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 531 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 532 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 533 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 534 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 535 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 536 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 537 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 538 539 /** 540 * enum mac80211_rate_control_flags - per-rate flags set by the 541 * Rate Control algorithm. 542 * 543 * These flags are set by the Rate control algorithm for each rate during tx, 544 * in the @flags member of struct ieee80211_tx_rate. 545 * 546 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 547 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 548 * This is set if the current BSS requires ERP protection. 549 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 550 * @IEEE80211_TX_RC_MCS: HT rate. 551 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 552 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 553 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 554 * Greenfield mode. 555 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 556 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 557 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 558 * (80+80 isn't supported yet) 559 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 560 * adjacent 20 MHz channels, if the current channel type is 561 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 562 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 563 */ 564 enum mac80211_rate_control_flags { 565 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 566 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 567 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 568 569 /* rate index is an HT/VHT MCS instead of an index */ 570 IEEE80211_TX_RC_MCS = BIT(3), 571 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 572 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 573 IEEE80211_TX_RC_DUP_DATA = BIT(6), 574 IEEE80211_TX_RC_SHORT_GI = BIT(7), 575 IEEE80211_TX_RC_VHT_MCS = BIT(8), 576 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 577 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 578 }; 579 580 581 /* there are 40 bytes if you don't need the rateset to be kept */ 582 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 583 584 /* if you do need the rateset, then you have less space */ 585 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 586 587 /* maximum number of rate stages */ 588 #define IEEE80211_TX_MAX_RATES 4 589 590 /* maximum number of rate table entries */ 591 #define IEEE80211_TX_RATE_TABLE_SIZE 4 592 593 /** 594 * struct ieee80211_tx_rate - rate selection/status 595 * 596 * @idx: rate index to attempt to send with 597 * @flags: rate control flags (&enum mac80211_rate_control_flags) 598 * @count: number of tries in this rate before going to the next rate 599 * 600 * A value of -1 for @idx indicates an invalid rate and, if used 601 * in an array of retry rates, that no more rates should be tried. 602 * 603 * When used for transmit status reporting, the driver should 604 * always report the rate along with the flags it used. 605 * 606 * &struct ieee80211_tx_info contains an array of these structs 607 * in the control information, and it will be filled by the rate 608 * control algorithm according to what should be sent. For example, 609 * if this array contains, in the format { <idx>, <count> } the 610 * information 611 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 612 * then this means that the frame should be transmitted 613 * up to twice at rate 3, up to twice at rate 2, and up to four 614 * times at rate 1 if it doesn't get acknowledged. Say it gets 615 * acknowledged by the peer after the fifth attempt, the status 616 * information should then contain 617 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 618 * since it was transmitted twice at rate 3, twice at rate 2 619 * and once at rate 1 after which we received an acknowledgement. 620 */ 621 struct ieee80211_tx_rate { 622 s8 idx; 623 u16 count:5, 624 flags:11; 625 } __packed; 626 627 #define IEEE80211_MAX_TX_RETRY 31 628 629 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 630 u8 mcs, u8 nss) 631 { 632 WARN_ON(mcs & ~0xF); 633 WARN_ON((nss - 1) & ~0x7); 634 rate->idx = ((nss - 1) << 4) | mcs; 635 } 636 637 static inline u8 638 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 639 { 640 return rate->idx & 0xF; 641 } 642 643 static inline u8 644 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 645 { 646 return (rate->idx >> 4) + 1; 647 } 648 649 /** 650 * struct ieee80211_tx_info - skb transmit information 651 * 652 * This structure is placed in skb->cb for three uses: 653 * (1) mac80211 TX control - mac80211 tells the driver what to do 654 * (2) driver internal use (if applicable) 655 * (3) TX status information - driver tells mac80211 what happened 656 * 657 * @flags: transmit info flags, defined above 658 * @band: the band to transmit on (use for checking for races) 659 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 660 * @ack_frame_id: internal frame ID for TX status, used internally 661 * @control: union for control data 662 * @status: union for status data 663 * @driver_data: array of driver_data pointers 664 * @ampdu_ack_len: number of acked aggregated frames. 665 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 666 * @ampdu_len: number of aggregated frames. 667 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 668 * @ack_signal: signal strength of the ACK frame 669 */ 670 struct ieee80211_tx_info { 671 /* common information */ 672 u32 flags; 673 u8 band; 674 675 u8 hw_queue; 676 677 u16 ack_frame_id; 678 679 union { 680 struct { 681 union { 682 /* rate control */ 683 struct { 684 struct ieee80211_tx_rate rates[ 685 IEEE80211_TX_MAX_RATES]; 686 s8 rts_cts_rate_idx; 687 u8 use_rts:1; 688 u8 use_cts_prot:1; 689 u8 short_preamble:1; 690 u8 skip_table:1; 691 /* 2 bytes free */ 692 }; 693 /* only needed before rate control */ 694 unsigned long jiffies; 695 }; 696 /* NB: vif can be NULL for injected frames */ 697 struct ieee80211_vif *vif; 698 struct ieee80211_key_conf *hw_key; 699 u32 flags; 700 /* 4 bytes free */ 701 } control; 702 struct { 703 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 704 int ack_signal; 705 u8 ampdu_ack_len; 706 u8 ampdu_len; 707 u8 antenna; 708 /* 21 bytes free */ 709 } status; 710 struct { 711 struct ieee80211_tx_rate driver_rates[ 712 IEEE80211_TX_MAX_RATES]; 713 u8 pad[4]; 714 715 void *rate_driver_data[ 716 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 717 }; 718 void *driver_data[ 719 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 720 }; 721 }; 722 723 /** 724 * struct ieee80211_sched_scan_ies - scheduled scan IEs 725 * 726 * This structure is used to pass the appropriate IEs to be used in scheduled 727 * scans for all bands. It contains both the IEs passed from the userspace 728 * and the ones generated by mac80211. 729 * 730 * @ie: array with the IEs for each supported band 731 * @len: array with the total length of the IEs for each band 732 */ 733 struct ieee80211_sched_scan_ies { 734 u8 *ie[IEEE80211_NUM_BANDS]; 735 size_t len[IEEE80211_NUM_BANDS]; 736 }; 737 738 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 739 { 740 return (struct ieee80211_tx_info *)skb->cb; 741 } 742 743 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 744 { 745 return (struct ieee80211_rx_status *)skb->cb; 746 } 747 748 /** 749 * ieee80211_tx_info_clear_status - clear TX status 750 * 751 * @info: The &struct ieee80211_tx_info to be cleared. 752 * 753 * When the driver passes an skb back to mac80211, it must report 754 * a number of things in TX status. This function clears everything 755 * in the TX status but the rate control information (it does clear 756 * the count since you need to fill that in anyway). 757 * 758 * NOTE: You can only use this function if you do NOT use 759 * info->driver_data! Use info->rate_driver_data 760 * instead if you need only the less space that allows. 761 */ 762 static inline void 763 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 764 { 765 int i; 766 767 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 768 offsetof(struct ieee80211_tx_info, control.rates)); 769 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 770 offsetof(struct ieee80211_tx_info, driver_rates)); 771 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 772 /* clear the rate counts */ 773 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 774 info->status.rates[i].count = 0; 775 776 BUILD_BUG_ON( 777 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 778 memset(&info->status.ampdu_ack_len, 0, 779 sizeof(struct ieee80211_tx_info) - 780 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 781 } 782 783 784 /** 785 * enum mac80211_rx_flags - receive flags 786 * 787 * These flags are used with the @flag member of &struct ieee80211_rx_status. 788 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 789 * Use together with %RX_FLAG_MMIC_STRIPPED. 790 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 791 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 792 * verification has been done by the hardware. 793 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 794 * If this flag is set, the stack cannot do any replay detection 795 * hence the driver or hardware will have to do that. 796 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 797 * the frame. 798 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 799 * the frame. 800 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 801 * field) is valid and contains the time the first symbol of the MPDU 802 * was received. This is useful in monitor mode and for proper IBSS 803 * merging. 804 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 805 * field) is valid and contains the time the last symbol of the MPDU 806 * (including FCS) was received. 807 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 808 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 809 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 810 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 811 * @RX_FLAG_80MHZ: 80 MHz was used 812 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 813 * @RX_FLAG_160MHZ: 160 MHz was used 814 * @RX_FLAG_SHORT_GI: Short guard interval was used 815 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 816 * Valid only for data frames (mainly A-MPDU) 817 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 818 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 819 * to hw.radiotap_mcs_details to advertise that fact 820 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 821 * number (@ampdu_reference) must be populated and be a distinct number for 822 * each A-MPDU 823 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 824 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 825 * monitoring purposes only 826 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 827 * subframes of a single A-MPDU 828 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 829 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 830 * on this subframe 831 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 832 * is stored in the @ampdu_delimiter_crc field) 833 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 834 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 835 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 836 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 837 * subframes instead of a one huge frame for performance reasons. 838 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 839 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 840 * the 3rd (last) one must not have this flag set. The flag is used to 841 * deal with retransmission/duplication recovery properly since A-MSDU 842 * subframes share the same sequence number. Reported subframes can be 843 * either regular MSDU or singly A-MSDUs. Subframes must not be 844 * interleaved with other frames. 845 */ 846 enum mac80211_rx_flags { 847 RX_FLAG_MMIC_ERROR = BIT(0), 848 RX_FLAG_DECRYPTED = BIT(1), 849 RX_FLAG_MMIC_STRIPPED = BIT(3), 850 RX_FLAG_IV_STRIPPED = BIT(4), 851 RX_FLAG_FAILED_FCS_CRC = BIT(5), 852 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 853 RX_FLAG_MACTIME_START = BIT(7), 854 RX_FLAG_SHORTPRE = BIT(8), 855 RX_FLAG_HT = BIT(9), 856 RX_FLAG_40MHZ = BIT(10), 857 RX_FLAG_SHORT_GI = BIT(11), 858 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 859 RX_FLAG_HT_GF = BIT(13), 860 RX_FLAG_AMPDU_DETAILS = BIT(14), 861 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 862 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 863 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 864 RX_FLAG_AMPDU_IS_LAST = BIT(18), 865 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 866 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 867 RX_FLAG_MACTIME_END = BIT(21), 868 RX_FLAG_VHT = BIT(22), 869 RX_FLAG_80MHZ = BIT(23), 870 RX_FLAG_80P80MHZ = BIT(24), 871 RX_FLAG_160MHZ = BIT(25), 872 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 873 RX_FLAG_10MHZ = BIT(28), 874 RX_FLAG_5MHZ = BIT(29), 875 RX_FLAG_AMSDU_MORE = BIT(30), 876 }; 877 878 #define RX_FLAG_STBC_SHIFT 26 879 880 /** 881 * struct ieee80211_rx_status - receive status 882 * 883 * The low-level driver should provide this information (the subset 884 * supported by hardware) to the 802.11 code with each received 885 * frame, in the skb's control buffer (cb). 886 * 887 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 888 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 889 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 890 * it but can store it and pass it back to the driver for synchronisation 891 * @band: the active band when this frame was received 892 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 893 * @signal: signal strength when receiving this frame, either in dBm, in dB or 894 * unspecified depending on the hardware capabilities flags 895 * @IEEE80211_HW_SIGNAL_* 896 * @chains: bitmask of receive chains for which separate signal strength 897 * values were filled. 898 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 899 * support dB or unspecified units) 900 * @antenna: antenna used 901 * @rate_idx: index of data rate into band's supported rates or MCS index if 902 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 903 * @vht_nss: number of streams (VHT only) 904 * @flag: %RX_FLAG_* 905 * @rx_flags: internal RX flags for mac80211 906 * @ampdu_reference: A-MPDU reference number, must be a different value for 907 * each A-MPDU but the same for each subframe within one A-MPDU 908 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 909 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 910 * @vendor_radiotap_len: radiotap vendor namespace length 911 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 912 * that the actual data must be at the start of the SKB data 913 * already. 914 * @vendor_radiotap_oui: radiotap vendor namespace OUI 915 * @vendor_radiotap_subns: radiotap vendor sub namespace 916 */ 917 struct ieee80211_rx_status { 918 u64 mactime; 919 u32 device_timestamp; 920 u32 ampdu_reference; 921 u32 flag; 922 u32 vendor_radiotap_bitmap; 923 u16 vendor_radiotap_len; 924 u16 freq; 925 u8 rate_idx; 926 u8 vht_nss; 927 u8 rx_flags; 928 u8 band; 929 u8 antenna; 930 s8 signal; 931 u8 chains; 932 s8 chain_signal[IEEE80211_MAX_CHAINS]; 933 u8 ampdu_delimiter_crc; 934 u8 vendor_radiotap_align; 935 u8 vendor_radiotap_oui[3]; 936 u8 vendor_radiotap_subns; 937 }; 938 939 /** 940 * enum ieee80211_conf_flags - configuration flags 941 * 942 * Flags to define PHY configuration options 943 * 944 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 945 * to determine for example whether to calculate timestamps for packets 946 * or not, do not use instead of filter flags! 947 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 948 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 949 * meaning that the hardware still wakes up for beacons, is able to 950 * transmit frames and receive the possible acknowledgment frames. 951 * Not to be confused with hardware specific wakeup/sleep states, 952 * driver is responsible for that. See the section "Powersave support" 953 * for more. 954 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 955 * the driver should be prepared to handle configuration requests but 956 * may turn the device off as much as possible. Typically, this flag will 957 * be set when an interface is set UP but not associated or scanning, but 958 * it can also be unset in that case when monitor interfaces are active. 959 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 960 * operating channel. 961 */ 962 enum ieee80211_conf_flags { 963 IEEE80211_CONF_MONITOR = (1<<0), 964 IEEE80211_CONF_PS = (1<<1), 965 IEEE80211_CONF_IDLE = (1<<2), 966 IEEE80211_CONF_OFFCHANNEL = (1<<3), 967 }; 968 969 970 /** 971 * enum ieee80211_conf_changed - denotes which configuration changed 972 * 973 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 974 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 975 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 976 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 977 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 978 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 979 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 980 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 981 * Note that this is only valid if channel contexts are not used, 982 * otherwise each channel context has the number of chains listed. 983 */ 984 enum ieee80211_conf_changed { 985 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 986 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 987 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 988 IEEE80211_CONF_CHANGE_PS = BIT(4), 989 IEEE80211_CONF_CHANGE_POWER = BIT(5), 990 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 991 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 992 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 993 }; 994 995 /** 996 * enum ieee80211_smps_mode - spatial multiplexing power save mode 997 * 998 * @IEEE80211_SMPS_AUTOMATIC: automatic 999 * @IEEE80211_SMPS_OFF: off 1000 * @IEEE80211_SMPS_STATIC: static 1001 * @IEEE80211_SMPS_DYNAMIC: dynamic 1002 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1003 */ 1004 enum ieee80211_smps_mode { 1005 IEEE80211_SMPS_AUTOMATIC, 1006 IEEE80211_SMPS_OFF, 1007 IEEE80211_SMPS_STATIC, 1008 IEEE80211_SMPS_DYNAMIC, 1009 1010 /* keep last */ 1011 IEEE80211_SMPS_NUM_MODES, 1012 }; 1013 1014 /** 1015 * struct ieee80211_conf - configuration of the device 1016 * 1017 * This struct indicates how the driver shall configure the hardware. 1018 * 1019 * @flags: configuration flags defined above 1020 * 1021 * @listen_interval: listen interval in units of beacon interval 1022 * @max_sleep_period: the maximum number of beacon intervals to sleep for 1023 * before checking the beacon for a TIM bit (managed mode only); this 1024 * value will be only achievable between DTIM frames, the hardware 1025 * needs to check for the multicast traffic bit in DTIM beacons. 1026 * This variable is valid only when the CONF_PS flag is set. 1027 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1028 * in power saving. Power saving will not be enabled until a beacon 1029 * has been received and the DTIM period is known. 1030 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1031 * powersave documentation below. This variable is valid only when 1032 * the CONF_PS flag is set. 1033 * 1034 * @power_level: requested transmit power (in dBm), backward compatibility 1035 * value only that is set to the minimum of all interfaces 1036 * 1037 * @chandef: the channel definition to tune to 1038 * @radar_enabled: whether radar detection is enabled 1039 * 1040 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1041 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1042 * but actually means the number of transmissions not the number of retries 1043 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1044 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1045 * number of transmissions not the number of retries 1046 * 1047 * @smps_mode: spatial multiplexing powersave mode; note that 1048 * %IEEE80211_SMPS_STATIC is used when the device is not 1049 * configured for an HT channel. 1050 * Note that this is only valid if channel contexts are not used, 1051 * otherwise each channel context has the number of chains listed. 1052 */ 1053 struct ieee80211_conf { 1054 u32 flags; 1055 int power_level, dynamic_ps_timeout; 1056 int max_sleep_period; 1057 1058 u16 listen_interval; 1059 u8 ps_dtim_period; 1060 1061 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1062 1063 struct cfg80211_chan_def chandef; 1064 bool radar_enabled; 1065 enum ieee80211_smps_mode smps_mode; 1066 }; 1067 1068 /** 1069 * struct ieee80211_channel_switch - holds the channel switch data 1070 * 1071 * The information provided in this structure is required for channel switch 1072 * operation. 1073 * 1074 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1075 * Function (TSF) timer when the frame containing the channel switch 1076 * announcement was received. This is simply the rx.mactime parameter 1077 * the driver passed into mac80211. 1078 * @block_tx: Indicates whether transmission must be blocked before the 1079 * scheduled channel switch, as indicated by the AP. 1080 * @chandef: the new channel to switch to 1081 * @count: the number of TBTT's until the channel switch event 1082 */ 1083 struct ieee80211_channel_switch { 1084 u64 timestamp; 1085 bool block_tx; 1086 struct cfg80211_chan_def chandef; 1087 u8 count; 1088 }; 1089 1090 /** 1091 * enum ieee80211_vif_flags - virtual interface flags 1092 * 1093 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1094 * on this virtual interface to avoid unnecessary CPU wakeups 1095 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1096 * monitoring on this virtual interface -- i.e. it can monitor 1097 * connection quality related parameters, such as the RSSI level and 1098 * provide notifications if configured trigger levels are reached. 1099 */ 1100 enum ieee80211_vif_flags { 1101 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1102 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1103 }; 1104 1105 /** 1106 * struct ieee80211_vif - per-interface data 1107 * 1108 * Data in this structure is continually present for driver 1109 * use during the life of a virtual interface. 1110 * 1111 * @type: type of this virtual interface 1112 * @bss_conf: BSS configuration for this interface, either our own 1113 * or the BSS we're associated to 1114 * @addr: address of this interface 1115 * @p2p: indicates whether this AP or STA interface is a p2p 1116 * interface, i.e. a GO or p2p-sta respectively 1117 * @csa_active: marks whether a channel switch is going on 1118 * @driver_flags: flags/capabilities the driver has for this interface, 1119 * these need to be set (or cleared) when the interface is added 1120 * or, if supported by the driver, the interface type is changed 1121 * at runtime, mac80211 will never touch this field 1122 * @hw_queue: hardware queue for each AC 1123 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1124 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1125 * when it is not assigned. This pointer is RCU-protected due to the TX 1126 * path needing to access it; even though the netdev carrier will always 1127 * be off when it is %NULL there can still be races and packets could be 1128 * processed after it switches back to %NULL. 1129 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1130 * interface debug files. Note that it will be NULL for the virtual 1131 * monitor interface (if that is requested.) 1132 * @drv_priv: data area for driver use, will always be aligned to 1133 * sizeof(void *). 1134 */ 1135 struct ieee80211_vif { 1136 enum nl80211_iftype type; 1137 struct ieee80211_bss_conf bss_conf; 1138 u8 addr[ETH_ALEN]; 1139 bool p2p; 1140 bool csa_active; 1141 1142 u8 cab_queue; 1143 u8 hw_queue[IEEE80211_NUM_ACS]; 1144 1145 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1146 1147 u32 driver_flags; 1148 1149 #ifdef CONFIG_MAC80211_DEBUGFS 1150 struct dentry *debugfs_dir; 1151 #endif 1152 1153 /* must be last */ 1154 u8 drv_priv[0] __aligned(sizeof(void *)); 1155 }; 1156 1157 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1158 { 1159 #ifdef CONFIG_MAC80211_MESH 1160 return vif->type == NL80211_IFTYPE_MESH_POINT; 1161 #endif 1162 return false; 1163 } 1164 1165 /** 1166 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1167 * @wdev: the wdev to get the vif for 1168 * 1169 * This can be used by mac80211 drivers with direct cfg80211 APIs 1170 * (like the vendor commands) that get a wdev. 1171 * 1172 * Note that this function may return %NULL if the given wdev isn't 1173 * associated with a vif that the driver knows about (e.g. monitor 1174 * or AP_VLAN interfaces.) 1175 */ 1176 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1177 1178 /** 1179 * enum ieee80211_key_flags - key flags 1180 * 1181 * These flags are used for communication about keys between the driver 1182 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1183 * 1184 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1185 * driver to indicate that it requires IV generation for this 1186 * particular key. 1187 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1188 * the driver for a TKIP key if it requires Michael MIC 1189 * generation in software. 1190 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1191 * that the key is pairwise rather then a shared key. 1192 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1193 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1194 * be done in software. 1195 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1196 * if space should be prepared for the IV, but the IV 1197 * itself should not be generated. Do not set together with 1198 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1199 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1200 * management frames. The flag can help drivers that have a hardware 1201 * crypto implementation that doesn't deal with management frames 1202 * properly by allowing them to not upload the keys to hardware and 1203 * fall back to software crypto. Note that this flag deals only with 1204 * RX, if your crypto engine can't deal with TX you can also set the 1205 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1206 */ 1207 enum ieee80211_key_flags { 1208 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1209 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1210 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1211 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1212 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1213 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1214 }; 1215 1216 /** 1217 * struct ieee80211_key_conf - key information 1218 * 1219 * This key information is given by mac80211 to the driver by 1220 * the set_key() callback in &struct ieee80211_ops. 1221 * 1222 * @hw_key_idx: To be set by the driver, this is the key index the driver 1223 * wants to be given when a frame is transmitted and needs to be 1224 * encrypted in hardware. 1225 * @cipher: The key's cipher suite selector. 1226 * @flags: key flags, see &enum ieee80211_key_flags. 1227 * @keyidx: the key index (0-3) 1228 * @keylen: key material length 1229 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1230 * data block: 1231 * - Temporal Encryption Key (128 bits) 1232 * - Temporal Authenticator Tx MIC Key (64 bits) 1233 * - Temporal Authenticator Rx MIC Key (64 bits) 1234 * @icv_len: The ICV length for this key type 1235 * @iv_len: The IV length for this key type 1236 */ 1237 struct ieee80211_key_conf { 1238 u32 cipher; 1239 u8 icv_len; 1240 u8 iv_len; 1241 u8 hw_key_idx; 1242 u8 flags; 1243 s8 keyidx; 1244 u8 keylen; 1245 u8 key[0]; 1246 }; 1247 1248 /** 1249 * struct ieee80211_cipher_scheme - cipher scheme 1250 * 1251 * This structure contains a cipher scheme information defining 1252 * the secure packet crypto handling. 1253 * 1254 * @cipher: a cipher suite selector 1255 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1256 * @hdr_len: a length of a security header used the cipher 1257 * @pn_len: a length of a packet number in the security header 1258 * @pn_off: an offset of pn from the beginning of the security header 1259 * @key_idx_off: an offset of key index byte in the security header 1260 * @key_idx_mask: a bit mask of key_idx bits 1261 * @key_idx_shift: a bit shift needed to get key_idx 1262 * key_idx value calculation: 1263 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1264 * @mic_len: a mic length in bytes 1265 */ 1266 struct ieee80211_cipher_scheme { 1267 u32 cipher; 1268 u16 iftype; 1269 u8 hdr_len; 1270 u8 pn_len; 1271 u8 pn_off; 1272 u8 key_idx_off; 1273 u8 key_idx_mask; 1274 u8 key_idx_shift; 1275 u8 mic_len; 1276 }; 1277 1278 /** 1279 * enum set_key_cmd - key command 1280 * 1281 * Used with the set_key() callback in &struct ieee80211_ops, this 1282 * indicates whether a key is being removed or added. 1283 * 1284 * @SET_KEY: a key is set 1285 * @DISABLE_KEY: a key must be disabled 1286 */ 1287 enum set_key_cmd { 1288 SET_KEY, DISABLE_KEY, 1289 }; 1290 1291 /** 1292 * enum ieee80211_sta_state - station state 1293 * 1294 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1295 * this is a special state for add/remove transitions 1296 * @IEEE80211_STA_NONE: station exists without special state 1297 * @IEEE80211_STA_AUTH: station is authenticated 1298 * @IEEE80211_STA_ASSOC: station is associated 1299 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1300 */ 1301 enum ieee80211_sta_state { 1302 /* NOTE: These need to be ordered correctly! */ 1303 IEEE80211_STA_NOTEXIST, 1304 IEEE80211_STA_NONE, 1305 IEEE80211_STA_AUTH, 1306 IEEE80211_STA_ASSOC, 1307 IEEE80211_STA_AUTHORIZED, 1308 }; 1309 1310 /** 1311 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1312 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1313 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1314 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1315 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1316 * (including 80+80 MHz) 1317 * 1318 * Implementation note: 20 must be zero to be initialized 1319 * correctly, the values must be sorted. 1320 */ 1321 enum ieee80211_sta_rx_bandwidth { 1322 IEEE80211_STA_RX_BW_20 = 0, 1323 IEEE80211_STA_RX_BW_40, 1324 IEEE80211_STA_RX_BW_80, 1325 IEEE80211_STA_RX_BW_160, 1326 }; 1327 1328 /** 1329 * struct ieee80211_sta_rates - station rate selection table 1330 * 1331 * @rcu_head: RCU head used for freeing the table on update 1332 * @rate: transmit rates/flags to be used by default. 1333 * Overriding entries per-packet is possible by using cb tx control. 1334 */ 1335 struct ieee80211_sta_rates { 1336 struct rcu_head rcu_head; 1337 struct { 1338 s8 idx; 1339 u8 count; 1340 u8 count_cts; 1341 u8 count_rts; 1342 u16 flags; 1343 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1344 }; 1345 1346 /** 1347 * struct ieee80211_sta - station table entry 1348 * 1349 * A station table entry represents a station we are possibly 1350 * communicating with. Since stations are RCU-managed in 1351 * mac80211, any ieee80211_sta pointer you get access to must 1352 * either be protected by rcu_read_lock() explicitly or implicitly, 1353 * or you must take good care to not use such a pointer after a 1354 * call to your sta_remove callback that removed it. 1355 * 1356 * @addr: MAC address 1357 * @aid: AID we assigned to the station if we're an AP 1358 * @supp_rates: Bitmap of supported rates (per band) 1359 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1360 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1361 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1362 * @drv_priv: data area for driver use, will always be aligned to 1363 * sizeof(void *), size is determined in hw information. 1364 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1365 * if wme is supported. 1366 * @max_sp: max Service Period. Only valid if wme is supported. 1367 * @bandwidth: current bandwidth the station can receive with 1368 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1369 * station can receive at the moment, changed by operating mode 1370 * notifications and capabilities. The value is only valid after 1371 * the station moves to associated state. 1372 * @smps_mode: current SMPS mode (off, static or dynamic) 1373 * @rates: rate control selection table 1374 */ 1375 struct ieee80211_sta { 1376 u32 supp_rates[IEEE80211_NUM_BANDS]; 1377 u8 addr[ETH_ALEN]; 1378 u16 aid; 1379 struct ieee80211_sta_ht_cap ht_cap; 1380 struct ieee80211_sta_vht_cap vht_cap; 1381 bool wme; 1382 u8 uapsd_queues; 1383 u8 max_sp; 1384 u8 rx_nss; 1385 enum ieee80211_sta_rx_bandwidth bandwidth; 1386 enum ieee80211_smps_mode smps_mode; 1387 struct ieee80211_sta_rates __rcu *rates; 1388 1389 /* must be last */ 1390 u8 drv_priv[0] __aligned(sizeof(void *)); 1391 }; 1392 1393 /** 1394 * enum sta_notify_cmd - sta notify command 1395 * 1396 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1397 * indicates if an associated station made a power state transition. 1398 * 1399 * @STA_NOTIFY_SLEEP: a station is now sleeping 1400 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1401 */ 1402 enum sta_notify_cmd { 1403 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1404 }; 1405 1406 /** 1407 * struct ieee80211_tx_control - TX control data 1408 * 1409 * @sta: station table entry, this sta pointer may be NULL and 1410 * it is not allowed to copy the pointer, due to RCU. 1411 */ 1412 struct ieee80211_tx_control { 1413 struct ieee80211_sta *sta; 1414 }; 1415 1416 /** 1417 * enum ieee80211_hw_flags - hardware flags 1418 * 1419 * These flags are used to indicate hardware capabilities to 1420 * the stack. Generally, flags here should have their meaning 1421 * done in a way that the simplest hardware doesn't need setting 1422 * any particular flags. There are some exceptions to this rule, 1423 * however, so you are advised to review these flags carefully. 1424 * 1425 * @IEEE80211_HW_HAS_RATE_CONTROL: 1426 * The hardware or firmware includes rate control, and cannot be 1427 * controlled by the stack. As such, no rate control algorithm 1428 * should be instantiated, and the TX rate reported to userspace 1429 * will be taken from the TX status instead of the rate control 1430 * algorithm. 1431 * Note that this requires that the driver implement a number of 1432 * callbacks so it has the correct information, it needs to have 1433 * the @set_rts_threshold callback and must look at the BSS config 1434 * @use_cts_prot for G/N protection, @use_short_slot for slot 1435 * timing in 2.4 GHz and @use_short_preamble for preambles for 1436 * CCK frames. 1437 * 1438 * @IEEE80211_HW_RX_INCLUDES_FCS: 1439 * Indicates that received frames passed to the stack include 1440 * the FCS at the end. 1441 * 1442 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1443 * Some wireless LAN chipsets buffer broadcast/multicast frames 1444 * for power saving stations in the hardware/firmware and others 1445 * rely on the host system for such buffering. This option is used 1446 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1447 * multicast frames when there are power saving stations so that 1448 * the driver can fetch them with ieee80211_get_buffered_bc(). 1449 * 1450 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1451 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1452 * 1453 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1454 * Hardware is not capable of receiving frames with short preamble on 1455 * the 2.4 GHz band. 1456 * 1457 * @IEEE80211_HW_SIGNAL_UNSPEC: 1458 * Hardware can provide signal values but we don't know its units. We 1459 * expect values between 0 and @max_signal. 1460 * If possible please provide dB or dBm instead. 1461 * 1462 * @IEEE80211_HW_SIGNAL_DBM: 1463 * Hardware gives signal values in dBm, decibel difference from 1464 * one milliwatt. This is the preferred method since it is standardized 1465 * between different devices. @max_signal does not need to be set. 1466 * 1467 * @IEEE80211_HW_SPECTRUM_MGMT: 1468 * Hardware supports spectrum management defined in 802.11h 1469 * Measurement, Channel Switch, Quieting, TPC 1470 * 1471 * @IEEE80211_HW_AMPDU_AGGREGATION: 1472 * Hardware supports 11n A-MPDU aggregation. 1473 * 1474 * @IEEE80211_HW_SUPPORTS_PS: 1475 * Hardware has power save support (i.e. can go to sleep). 1476 * 1477 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1478 * Hardware requires nullfunc frame handling in stack, implies 1479 * stack support for dynamic PS. 1480 * 1481 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1482 * Hardware has support for dynamic PS. 1483 * 1484 * @IEEE80211_HW_MFP_CAPABLE: 1485 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1486 * 1487 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1488 * Hardware supports static spatial multiplexing powersave, 1489 * ie. can turn off all but one chain even on HT connections 1490 * that should be using more chains. 1491 * 1492 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1493 * Hardware supports dynamic spatial multiplexing powersave, 1494 * ie. can turn off all but one chain and then wake the rest 1495 * up as required after, for example, rts/cts handshake. 1496 * 1497 * @IEEE80211_HW_SUPPORTS_UAPSD: 1498 * Hardware supports Unscheduled Automatic Power Save Delivery 1499 * (U-APSD) in managed mode. The mode is configured with 1500 * conf_tx() operation. 1501 * 1502 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1503 * Hardware can provide ack status reports of Tx frames to 1504 * the stack. 1505 * 1506 * @IEEE80211_HW_CONNECTION_MONITOR: 1507 * The hardware performs its own connection monitoring, including 1508 * periodic keep-alives to the AP and probing the AP on beacon loss. 1509 * When this flag is set, signaling beacon-loss will cause an immediate 1510 * change to disassociated state. 1511 * 1512 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1513 * This device needs to get data from beacon before association (i.e. 1514 * dtim_period). 1515 * 1516 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1517 * per-station GTKs as used by IBSS RSN or during fast transition. If 1518 * the device doesn't support per-station GTKs, but can be asked not 1519 * to decrypt group addressed frames, then IBSS RSN support is still 1520 * possible but software crypto will be used. Advertise the wiphy flag 1521 * only in that case. 1522 * 1523 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1524 * autonomously manages the PS status of connected stations. When 1525 * this flag is set mac80211 will not trigger PS mode for connected 1526 * stations based on the PM bit of incoming frames. 1527 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1528 * the PS mode of connected stations. 1529 * 1530 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1531 * setup strictly in HW. mac80211 should not attempt to do this in 1532 * software. 1533 * 1534 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1535 * a virtual monitor interface when monitor interfaces are the only 1536 * active interfaces. 1537 * 1538 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1539 * queue mapping in order to use different queues (not just one per AC) 1540 * for different virtual interfaces. See the doc section on HW queue 1541 * control for more details. 1542 * 1543 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1544 * selection table provided by the rate control algorithm. 1545 * 1546 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1547 * P2P Interface. This will be honoured even if more than one interface 1548 * is supported. 1549 * 1550 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1551 * only, to allow getting TBTT of a DTIM beacon. 1552 * 1553 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1554 * and can cope with CCK rates in an aggregation session (e.g. by not 1555 * using aggregation for such frames.) 1556 * 1557 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1558 * for a single active channel while using channel contexts. When support 1559 * is not enabled the default action is to disconnect when getting the 1560 * CSA frame. 1561 */ 1562 enum ieee80211_hw_flags { 1563 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1564 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1565 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1566 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1567 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1568 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1569 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1570 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1571 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1572 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1573 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1574 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1575 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1576 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1577 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1578 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1579 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1580 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1581 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1582 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1583 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1584 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1585 IEEE80211_HW_AP_LINK_PS = 1<<22, 1586 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1587 IEEE80211_HW_SUPPORTS_RC_TABLE = 1<<24, 1588 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1589 IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, 1590 IEEE80211_HW_SUPPORTS_HT_CCK_RATES = 1<<27, 1591 IEEE80211_HW_CHANCTX_STA_CSA = 1<<28, 1592 }; 1593 1594 /** 1595 * struct ieee80211_hw - hardware information and state 1596 * 1597 * This structure contains the configuration and hardware 1598 * information for an 802.11 PHY. 1599 * 1600 * @wiphy: This points to the &struct wiphy allocated for this 1601 * 802.11 PHY. You must fill in the @perm_addr and @dev 1602 * members of this structure using SET_IEEE80211_DEV() 1603 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1604 * bands (with channels, bitrates) are registered here. 1605 * 1606 * @conf: &struct ieee80211_conf, device configuration, don't use. 1607 * 1608 * @priv: pointer to private area that was allocated for driver use 1609 * along with this structure. 1610 * 1611 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1612 * 1613 * @extra_tx_headroom: headroom to reserve in each transmit skb 1614 * for use by the driver (e.g. for transmit headers.) 1615 * 1616 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 1617 * Can be used by drivers to add extra IEs. 1618 * 1619 * @max_signal: Maximum value for signal (rssi) in RX information, used 1620 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1621 * 1622 * @max_listen_interval: max listen interval in units of beacon interval 1623 * that HW supports 1624 * 1625 * @queues: number of available hardware transmit queues for 1626 * data packets. WMM/QoS requires at least four, these 1627 * queues need to have configurable access parameters. 1628 * 1629 * @rate_control_algorithm: rate control algorithm for this hardware. 1630 * If unset (NULL), the default algorithm will be used. Must be 1631 * set before calling ieee80211_register_hw(). 1632 * 1633 * @vif_data_size: size (in bytes) of the drv_priv data area 1634 * within &struct ieee80211_vif. 1635 * @sta_data_size: size (in bytes) of the drv_priv data area 1636 * within &struct ieee80211_sta. 1637 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1638 * within &struct ieee80211_chanctx_conf. 1639 * 1640 * @max_rates: maximum number of alternate rate retry stages the hw 1641 * can handle. 1642 * @max_report_rates: maximum number of alternate rate retry stages 1643 * the hw can report back. 1644 * @max_rate_tries: maximum number of tries for each stage 1645 * 1646 * @napi_weight: weight used for NAPI polling. You must specify an 1647 * appropriate value here if a napi_poll operation is provided 1648 * by your driver. 1649 * 1650 * @max_rx_aggregation_subframes: maximum buffer size (number of 1651 * sub-frames) to be used for A-MPDU block ack receiver 1652 * aggregation. 1653 * This is only relevant if the device has restrictions on the 1654 * number of subframes, if it relies on mac80211 to do reordering 1655 * it shouldn't be set. 1656 * 1657 * @max_tx_aggregation_subframes: maximum number of subframes in an 1658 * aggregate an HT driver will transmit, used by the peer as a 1659 * hint to size its reorder buffer. 1660 * 1661 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1662 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1663 * 1664 * @radiotap_mcs_details: lists which MCS information can the HW 1665 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1666 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1667 * adding _BW is supported today. 1668 * 1669 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1670 * the default is _GI | _BANDWIDTH. 1671 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1672 * 1673 * @netdev_features: netdev features to be set in each netdev created 1674 * from this HW. Note only HW checksum features are currently 1675 * compatible with mac80211. Other feature bits will be rejected. 1676 * 1677 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 1678 * for each access category if it is uAPSD trigger-enabled and delivery- 1679 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 1680 * Each bit corresponds to different AC. Value '1' in specific bit means 1681 * that corresponding AC is both trigger- and delivery-enabled. '0' means 1682 * neither enabled. 1683 * 1684 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 1685 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 1686 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 1687 * 1688 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 1689 * @cipher_schemes: a pointer to an array of cipher scheme definitions 1690 * supported by HW. 1691 */ 1692 struct ieee80211_hw { 1693 struct ieee80211_conf conf; 1694 struct wiphy *wiphy; 1695 const char *rate_control_algorithm; 1696 void *priv; 1697 u32 flags; 1698 unsigned int extra_tx_headroom; 1699 unsigned int extra_beacon_tailroom; 1700 int vif_data_size; 1701 int sta_data_size; 1702 int chanctx_data_size; 1703 int napi_weight; 1704 u16 queues; 1705 u16 max_listen_interval; 1706 s8 max_signal; 1707 u8 max_rates; 1708 u8 max_report_rates; 1709 u8 max_rate_tries; 1710 u8 max_rx_aggregation_subframes; 1711 u8 max_tx_aggregation_subframes; 1712 u8 offchannel_tx_hw_queue; 1713 u8 radiotap_mcs_details; 1714 u16 radiotap_vht_details; 1715 netdev_features_t netdev_features; 1716 u8 uapsd_queues; 1717 u8 uapsd_max_sp_len; 1718 u8 n_cipher_schemes; 1719 const struct ieee80211_cipher_scheme *cipher_schemes; 1720 }; 1721 1722 /** 1723 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1724 * 1725 * @wiphy: the &struct wiphy which we want to query 1726 * 1727 * mac80211 drivers can use this to get to their respective 1728 * &struct ieee80211_hw. Drivers wishing to get to their own private 1729 * structure can then access it via hw->priv. Note that mac802111 drivers should 1730 * not use wiphy_priv() to try to get their private driver structure as this 1731 * is already used internally by mac80211. 1732 * 1733 * Return: The mac80211 driver hw struct of @wiphy. 1734 */ 1735 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1736 1737 /** 1738 * SET_IEEE80211_DEV - set device for 802.11 hardware 1739 * 1740 * @hw: the &struct ieee80211_hw to set the device for 1741 * @dev: the &struct device of this 802.11 device 1742 */ 1743 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1744 { 1745 set_wiphy_dev(hw->wiphy, dev); 1746 } 1747 1748 /** 1749 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1750 * 1751 * @hw: the &struct ieee80211_hw to set the MAC address for 1752 * @addr: the address to set 1753 */ 1754 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1755 { 1756 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1757 } 1758 1759 static inline struct ieee80211_rate * 1760 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1761 const struct ieee80211_tx_info *c) 1762 { 1763 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1764 return NULL; 1765 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1766 } 1767 1768 static inline struct ieee80211_rate * 1769 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1770 const struct ieee80211_tx_info *c) 1771 { 1772 if (c->control.rts_cts_rate_idx < 0) 1773 return NULL; 1774 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1775 } 1776 1777 static inline struct ieee80211_rate * 1778 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1779 const struct ieee80211_tx_info *c, int idx) 1780 { 1781 if (c->control.rates[idx + 1].idx < 0) 1782 return NULL; 1783 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1784 } 1785 1786 /** 1787 * ieee80211_free_txskb - free TX skb 1788 * @hw: the hardware 1789 * @skb: the skb 1790 * 1791 * Free a transmit skb. Use this funtion when some failure 1792 * to transmit happened and thus status cannot be reported. 1793 */ 1794 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1795 1796 /** 1797 * DOC: Hardware crypto acceleration 1798 * 1799 * mac80211 is capable of taking advantage of many hardware 1800 * acceleration designs for encryption and decryption operations. 1801 * 1802 * The set_key() callback in the &struct ieee80211_ops for a given 1803 * device is called to enable hardware acceleration of encryption and 1804 * decryption. The callback takes a @sta parameter that will be NULL 1805 * for default keys or keys used for transmission only, or point to 1806 * the station information for the peer for individual keys. 1807 * Multiple transmission keys with the same key index may be used when 1808 * VLANs are configured for an access point. 1809 * 1810 * When transmitting, the TX control data will use the @hw_key_idx 1811 * selected by the driver by modifying the &struct ieee80211_key_conf 1812 * pointed to by the @key parameter to the set_key() function. 1813 * 1814 * The set_key() call for the %SET_KEY command should return 0 if 1815 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1816 * added; if you return 0 then hw_key_idx must be assigned to the 1817 * hardware key index, you are free to use the full u8 range. 1818 * 1819 * When the cmd is %DISABLE_KEY then it must succeed. 1820 * 1821 * Note that it is permissible to not decrypt a frame even if a key 1822 * for it has been uploaded to hardware, the stack will not make any 1823 * decision based on whether a key has been uploaded or not but rather 1824 * based on the receive flags. 1825 * 1826 * The &struct ieee80211_key_conf structure pointed to by the @key 1827 * parameter is guaranteed to be valid until another call to set_key() 1828 * removes it, but it can only be used as a cookie to differentiate 1829 * keys. 1830 * 1831 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1832 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1833 * handler. 1834 * The update_tkip_key() call updates the driver with the new phase 1 key. 1835 * This happens every time the iv16 wraps around (every 65536 packets). The 1836 * set_key() call will happen only once for each key (unless the AP did 1837 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1838 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1839 * handler is software decryption with wrap around of iv16. 1840 * 1841 * The set_default_unicast_key() call updates the default WEP key index 1842 * configured to the hardware for WEP encryption type. This is required 1843 * for devices that support offload of data packets (e.g. ARP responses). 1844 */ 1845 1846 /** 1847 * DOC: Powersave support 1848 * 1849 * mac80211 has support for various powersave implementations. 1850 * 1851 * First, it can support hardware that handles all powersaving by itself, 1852 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1853 * flag. In that case, it will be told about the desired powersave mode 1854 * with the %IEEE80211_CONF_PS flag depending on the association status. 1855 * The hardware must take care of sending nullfunc frames when necessary, 1856 * i.e. when entering and leaving powersave mode. The hardware is required 1857 * to look at the AID in beacons and signal to the AP that it woke up when 1858 * it finds traffic directed to it. 1859 * 1860 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1861 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1862 * with hardware wakeup and sleep states. Driver is responsible for waking 1863 * up the hardware before issuing commands to the hardware and putting it 1864 * back to sleep at appropriate times. 1865 * 1866 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1867 * buffered multicast/broadcast frames after the beacon. Also it must be 1868 * possible to send frames and receive the acknowledment frame. 1869 * 1870 * Other hardware designs cannot send nullfunc frames by themselves and also 1871 * need software support for parsing the TIM bitmap. This is also supported 1872 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1873 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1874 * required to pass up beacons. The hardware is still required to handle 1875 * waking up for multicast traffic; if it cannot the driver must handle that 1876 * as best as it can, mac80211 is too slow to do that. 1877 * 1878 * Dynamic powersave is an extension to normal powersave in which the 1879 * hardware stays awake for a user-specified period of time after sending a 1880 * frame so that reply frames need not be buffered and therefore delayed to 1881 * the next wakeup. It's compromise of getting good enough latency when 1882 * there's data traffic and still saving significantly power in idle 1883 * periods. 1884 * 1885 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1886 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1887 * flag and mac80211 will handle everything automatically. Additionally, 1888 * hardware having support for the dynamic PS feature may set the 1889 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1890 * dynamic PS mode itself. The driver needs to look at the 1891 * @dynamic_ps_timeout hardware configuration value and use it that value 1892 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1893 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1894 * enabled whenever user has enabled powersave. 1895 * 1896 * Driver informs U-APSD client support by enabling 1897 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1898 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1899 * Nullfunc frames and stay awake until the service period has ended. To 1900 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1901 * from that AC are transmitted with powersave enabled. 1902 * 1903 * Note: U-APSD client mode is not yet supported with 1904 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1905 */ 1906 1907 /** 1908 * DOC: Beacon filter support 1909 * 1910 * Some hardware have beacon filter support to reduce host cpu wakeups 1911 * which will reduce system power consumption. It usually works so that 1912 * the firmware creates a checksum of the beacon but omits all constantly 1913 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1914 * beacon is forwarded to the host, otherwise it will be just dropped. That 1915 * way the host will only receive beacons where some relevant information 1916 * (for example ERP protection or WMM settings) have changed. 1917 * 1918 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1919 * interface capability. The driver needs to enable beacon filter support 1920 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1921 * power save is enabled, the stack will not check for beacon loss and the 1922 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1923 * 1924 * The time (or number of beacons missed) until the firmware notifies the 1925 * driver of a beacon loss event (which in turn causes the driver to call 1926 * ieee80211_beacon_loss()) should be configurable and will be controlled 1927 * by mac80211 and the roaming algorithm in the future. 1928 * 1929 * Since there may be constantly changing information elements that nothing 1930 * in the software stack cares about, we will, in the future, have mac80211 1931 * tell the driver which information elements are interesting in the sense 1932 * that we want to see changes in them. This will include 1933 * - a list of information element IDs 1934 * - a list of OUIs for the vendor information element 1935 * 1936 * Ideally, the hardware would filter out any beacons without changes in the 1937 * requested elements, but if it cannot support that it may, at the expense 1938 * of some efficiency, filter out only a subset. For example, if the device 1939 * doesn't support checking for OUIs it should pass up all changes in all 1940 * vendor information elements. 1941 * 1942 * Note that change, for the sake of simplification, also includes information 1943 * elements appearing or disappearing from the beacon. 1944 * 1945 * Some hardware supports an "ignore list" instead, just make sure nothing 1946 * that was requested is on the ignore list, and include commonly changing 1947 * information element IDs in the ignore list, for example 11 (BSS load) and 1948 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1949 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1950 * it could also include some currently unused IDs. 1951 * 1952 * 1953 * In addition to these capabilities, hardware should support notifying the 1954 * host of changes in the beacon RSSI. This is relevant to implement roaming 1955 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1956 * the received data packets). This can consist in notifying the host when 1957 * the RSSI changes significantly or when it drops below or rises above 1958 * configurable thresholds. In the future these thresholds will also be 1959 * configured by mac80211 (which gets them from userspace) to implement 1960 * them as the roaming algorithm requires. 1961 * 1962 * If the hardware cannot implement this, the driver should ask it to 1963 * periodically pass beacon frames to the host so that software can do the 1964 * signal strength threshold checking. 1965 */ 1966 1967 /** 1968 * DOC: Spatial multiplexing power save 1969 * 1970 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1971 * power in an 802.11n implementation. For details on the mechanism 1972 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1973 * "11.2.3 SM power save". 1974 * 1975 * The mac80211 implementation is capable of sending action frames 1976 * to update the AP about the station's SMPS mode, and will instruct 1977 * the driver to enter the specific mode. It will also announce the 1978 * requested SMPS mode during the association handshake. Hardware 1979 * support for this feature is required, and can be indicated by 1980 * hardware flags. 1981 * 1982 * The default mode will be "automatic", which nl80211/cfg80211 1983 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1984 * turned off otherwise. 1985 * 1986 * To support this feature, the driver must set the appropriate 1987 * hardware support flags, and handle the SMPS flag to the config() 1988 * operation. It will then with this mechanism be instructed to 1989 * enter the requested SMPS mode while associated to an HT AP. 1990 */ 1991 1992 /** 1993 * DOC: Frame filtering 1994 * 1995 * mac80211 requires to see many management frames for proper 1996 * operation, and users may want to see many more frames when 1997 * in monitor mode. However, for best CPU usage and power consumption, 1998 * having as few frames as possible percolate through the stack is 1999 * desirable. Hence, the hardware should filter as much as possible. 2000 * 2001 * To achieve this, mac80211 uses filter flags (see below) to tell 2002 * the driver's configure_filter() function which frames should be 2003 * passed to mac80211 and which should be filtered out. 2004 * 2005 * Before configure_filter() is invoked, the prepare_multicast() 2006 * callback is invoked with the parameters @mc_count and @mc_list 2007 * for the combined multicast address list of all virtual interfaces. 2008 * It's use is optional, and it returns a u64 that is passed to 2009 * configure_filter(). Additionally, configure_filter() has the 2010 * arguments @changed_flags telling which flags were changed and 2011 * @total_flags with the new flag states. 2012 * 2013 * If your device has no multicast address filters your driver will 2014 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2015 * parameter to see whether multicast frames should be accepted 2016 * or dropped. 2017 * 2018 * All unsupported flags in @total_flags must be cleared. 2019 * Hardware does not support a flag if it is incapable of _passing_ 2020 * the frame to the stack. Otherwise the driver must ignore 2021 * the flag, but not clear it. 2022 * You must _only_ clear the flag (announce no support for the 2023 * flag to mac80211) if you are not able to pass the packet type 2024 * to the stack (so the hardware always filters it). 2025 * So for example, you should clear @FIF_CONTROL, if your hardware 2026 * always filters control frames. If your hardware always passes 2027 * control frames to the kernel and is incapable of filtering them, 2028 * you do _not_ clear the @FIF_CONTROL flag. 2029 * This rule applies to all other FIF flags as well. 2030 */ 2031 2032 /** 2033 * DOC: AP support for powersaving clients 2034 * 2035 * In order to implement AP and P2P GO modes, mac80211 has support for 2036 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2037 * There currently is no support for sAPSD. 2038 * 2039 * There is one assumption that mac80211 makes, namely that a client 2040 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2041 * Both are supported, and both can be used by the same client, but 2042 * they can't be used concurrently by the same client. This simplifies 2043 * the driver code. 2044 * 2045 * The first thing to keep in mind is that there is a flag for complete 2046 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2047 * mac80211 expects the driver to handle most of the state machine for 2048 * powersaving clients and will ignore the PM bit in incoming frames. 2049 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2050 * stations' powersave transitions. In this mode, mac80211 also doesn't 2051 * handle PS-Poll/uAPSD. 2052 * 2053 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2054 * PM bit in incoming frames for client powersave transitions. When a 2055 * station goes to sleep, we will stop transmitting to it. There is, 2056 * however, a race condition: a station might go to sleep while there is 2057 * data buffered on hardware queues. If the device has support for this 2058 * it will reject frames, and the driver should give the frames back to 2059 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2060 * cause mac80211 to retry the frame when the station wakes up. The 2061 * driver is also notified of powersave transitions by calling its 2062 * @sta_notify callback. 2063 * 2064 * When the station is asleep, it has three choices: it can wake up, 2065 * it can PS-Poll, or it can possibly start a uAPSD service period. 2066 * Waking up is implemented by simply transmitting all buffered (and 2067 * filtered) frames to the station. This is the easiest case. When 2068 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2069 * will inform the driver of this with the @allow_buffered_frames 2070 * callback; this callback is optional. mac80211 will then transmit 2071 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2072 * on each frame. The last frame in the service period (or the only 2073 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2074 * indicate that it ends the service period; as this frame must have 2075 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2076 * When TX status is reported for this frame, the service period is 2077 * marked has having ended and a new one can be started by the peer. 2078 * 2079 * Additionally, non-bufferable MMPDUs can also be transmitted by 2080 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2081 * 2082 * Another race condition can happen on some devices like iwlwifi 2083 * when there are frames queued for the station and it wakes up 2084 * or polls; the frames that are already queued could end up being 2085 * transmitted first instead, causing reordering and/or wrong 2086 * processing of the EOSP. The cause is that allowing frames to be 2087 * transmitted to a certain station is out-of-band communication to 2088 * the device. To allow this problem to be solved, the driver can 2089 * call ieee80211_sta_block_awake() if frames are buffered when it 2090 * is notified that the station went to sleep. When all these frames 2091 * have been filtered (see above), it must call the function again 2092 * to indicate that the station is no longer blocked. 2093 * 2094 * If the driver buffers frames in the driver for aggregation in any 2095 * way, it must use the ieee80211_sta_set_buffered() call when it is 2096 * notified of the station going to sleep to inform mac80211 of any 2097 * TIDs that have frames buffered. Note that when a station wakes up 2098 * this information is reset (hence the requirement to call it when 2099 * informed of the station going to sleep). Then, when a service 2100 * period starts for any reason, @release_buffered_frames is called 2101 * with the number of frames to be released and which TIDs they are 2102 * to come from. In this case, the driver is responsible for setting 2103 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2104 * to help the @more_data paramter is passed to tell the driver if 2105 * there is more data on other TIDs -- the TIDs to release frames 2106 * from are ignored since mac80211 doesn't know how many frames the 2107 * buffers for those TIDs contain. 2108 * 2109 * If the driver also implement GO mode, where absence periods may 2110 * shorten service periods (or abort PS-Poll responses), it must 2111 * filter those response frames except in the case of frames that 2112 * are buffered in the driver -- those must remain buffered to avoid 2113 * reordering. Because it is possible that no frames are released 2114 * in this case, the driver must call ieee80211_sta_eosp() 2115 * to indicate to mac80211 that the service period ended anyway. 2116 * 2117 * Finally, if frames from multiple TIDs are released from mac80211 2118 * but the driver might reorder them, it must clear & set the flags 2119 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2120 * and also take care of the EOSP and MORE_DATA bits in the frame. 2121 * The driver may also use ieee80211_sta_eosp() in this case. 2122 * 2123 * Note that if the driver ever buffers frames other than QoS-data 2124 * frames, it must take care to never send a non-QoS-data frame as 2125 * the last frame in a service period, adding a QoS-nulldata frame 2126 * after a non-QoS-data frame if needed. 2127 */ 2128 2129 /** 2130 * DOC: HW queue control 2131 * 2132 * Before HW queue control was introduced, mac80211 only had a single static 2133 * assignment of per-interface AC software queues to hardware queues. This 2134 * was problematic for a few reasons: 2135 * 1) off-channel transmissions might get stuck behind other frames 2136 * 2) multiple virtual interfaces couldn't be handled correctly 2137 * 3) after-DTIM frames could get stuck behind other frames 2138 * 2139 * To solve this, hardware typically uses multiple different queues for all 2140 * the different usages, and this needs to be propagated into mac80211 so it 2141 * won't have the same problem with the software queues. 2142 * 2143 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2144 * flag that tells it that the driver implements its own queue control. To do 2145 * so, the driver will set up the various queues in each &struct ieee80211_vif 2146 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2147 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2148 * if necessary will queue the frame on the right software queue that mirrors 2149 * the hardware queue. 2150 * Additionally, the driver has to then use these HW queue IDs for the queue 2151 * management functions (ieee80211_stop_queue() et al.) 2152 * 2153 * The driver is free to set up the queue mappings as needed, multiple virtual 2154 * interfaces may map to the same hardware queues if needed. The setup has to 2155 * happen during add_interface or change_interface callbacks. For example, a 2156 * driver supporting station+station and station+AP modes might decide to have 2157 * 10 hardware queues to handle different scenarios: 2158 * 2159 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2160 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2161 * after-DTIM queue for AP: 8 2162 * off-channel queue: 9 2163 * 2164 * It would then set up the hardware like this: 2165 * hw.offchannel_tx_hw_queue = 9 2166 * 2167 * and the first virtual interface that is added as follows: 2168 * vif.hw_queue[IEEE80211_AC_VO] = 0 2169 * vif.hw_queue[IEEE80211_AC_VI] = 1 2170 * vif.hw_queue[IEEE80211_AC_BE] = 2 2171 * vif.hw_queue[IEEE80211_AC_BK] = 3 2172 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2173 * and the second virtual interface with 4-7. 2174 * 2175 * If queue 6 gets full, for example, mac80211 would only stop the second 2176 * virtual interface's BE queue since virtual interface queues are per AC. 2177 * 2178 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2179 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2180 * queue could potentially be shared since mac80211 will look at cab_queue when 2181 * a queue is stopped/woken even if the interface is not in AP mode. 2182 */ 2183 2184 /** 2185 * enum ieee80211_filter_flags - hardware filter flags 2186 * 2187 * These flags determine what the filter in hardware should be 2188 * programmed to let through and what should not be passed to the 2189 * stack. It is always safe to pass more frames than requested, 2190 * but this has negative impact on power consumption. 2191 * 2192 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 2193 * think of the BSS as your network segment and then this corresponds 2194 * to the regular ethernet device promiscuous mode. 2195 * 2196 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2197 * by the user or if the hardware is not capable of filtering by 2198 * multicast address. 2199 * 2200 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2201 * %RX_FLAG_FAILED_FCS_CRC for them) 2202 * 2203 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2204 * the %RX_FLAG_FAILED_PLCP_CRC for them 2205 * 2206 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2207 * to the hardware that it should not filter beacons or probe responses 2208 * by BSSID. Filtering them can greatly reduce the amount of processing 2209 * mac80211 needs to do and the amount of CPU wakeups, so you should 2210 * honour this flag if possible. 2211 * 2212 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2213 * is not set then only those addressed to this station. 2214 * 2215 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2216 * 2217 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2218 * those addressed to this station. 2219 * 2220 * @FIF_PROBE_REQ: pass probe request frames 2221 */ 2222 enum ieee80211_filter_flags { 2223 FIF_PROMISC_IN_BSS = 1<<0, 2224 FIF_ALLMULTI = 1<<1, 2225 FIF_FCSFAIL = 1<<2, 2226 FIF_PLCPFAIL = 1<<3, 2227 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2228 FIF_CONTROL = 1<<5, 2229 FIF_OTHER_BSS = 1<<6, 2230 FIF_PSPOLL = 1<<7, 2231 FIF_PROBE_REQ = 1<<8, 2232 }; 2233 2234 /** 2235 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2236 * 2237 * These flags are used with the ampdu_action() callback in 2238 * &struct ieee80211_ops to indicate which action is needed. 2239 * 2240 * Note that drivers MUST be able to deal with a TX aggregation 2241 * session being stopped even before they OK'ed starting it by 2242 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2243 * might receive the addBA frame and send a delBA right away! 2244 * 2245 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2246 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2247 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2248 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2249 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2250 * queued packets, now unaggregated. After all packets are transmitted the 2251 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2252 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2253 * called when the station is removed. There's no need or reason to call 2254 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2255 * session is gone and removes the station. 2256 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2257 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2258 * now the connection is dropped and the station will be removed. Drivers 2259 * should clean up and drop remaining packets when this is called. 2260 */ 2261 enum ieee80211_ampdu_mlme_action { 2262 IEEE80211_AMPDU_RX_START, 2263 IEEE80211_AMPDU_RX_STOP, 2264 IEEE80211_AMPDU_TX_START, 2265 IEEE80211_AMPDU_TX_STOP_CONT, 2266 IEEE80211_AMPDU_TX_STOP_FLUSH, 2267 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2268 IEEE80211_AMPDU_TX_OPERATIONAL, 2269 }; 2270 2271 /** 2272 * enum ieee80211_frame_release_type - frame release reason 2273 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2274 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2275 * frame received on trigger-enabled AC 2276 */ 2277 enum ieee80211_frame_release_type { 2278 IEEE80211_FRAME_RELEASE_PSPOLL, 2279 IEEE80211_FRAME_RELEASE_UAPSD, 2280 }; 2281 2282 /** 2283 * enum ieee80211_rate_control_changed - flags to indicate what changed 2284 * 2285 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2286 * to this station changed. The actual bandwidth is in the station 2287 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2288 * flag changes, for HT and VHT the bandwidth field changes. 2289 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2290 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2291 * changed (in IBSS mode) due to discovering more information about 2292 * the peer. 2293 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2294 * by the peer 2295 */ 2296 enum ieee80211_rate_control_changed { 2297 IEEE80211_RC_BW_CHANGED = BIT(0), 2298 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2299 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2300 IEEE80211_RC_NSS_CHANGED = BIT(3), 2301 }; 2302 2303 /** 2304 * enum ieee80211_roc_type - remain on channel type 2305 * 2306 * With the support for multi channel contexts and multi channel operations, 2307 * remain on channel operations might be limited/deferred/aborted by other 2308 * flows/operations which have higher priority (and vise versa). 2309 * Specifying the ROC type can be used by devices to prioritize the ROC 2310 * operations compared to other operations/flows. 2311 * 2312 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2313 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2314 * for sending managment frames offchannel. 2315 */ 2316 enum ieee80211_roc_type { 2317 IEEE80211_ROC_TYPE_NORMAL = 0, 2318 IEEE80211_ROC_TYPE_MGMT_TX, 2319 }; 2320 2321 /** 2322 * struct ieee80211_ops - callbacks from mac80211 to the driver 2323 * 2324 * This structure contains various callbacks that the driver may 2325 * handle or, in some cases, must handle, for example to configure 2326 * the hardware to a new channel or to transmit a frame. 2327 * 2328 * @tx: Handler that 802.11 module calls for each transmitted frame. 2329 * skb contains the buffer starting from the IEEE 802.11 header. 2330 * The low-level driver should send the frame out based on 2331 * configuration in the TX control data. This handler should, 2332 * preferably, never fail and stop queues appropriately. 2333 * Must be atomic. 2334 * 2335 * @start: Called before the first netdevice attached to the hardware 2336 * is enabled. This should turn on the hardware and must turn on 2337 * frame reception (for possibly enabled monitor interfaces.) 2338 * Returns negative error codes, these may be seen in userspace, 2339 * or zero. 2340 * When the device is started it should not have a MAC address 2341 * to avoid acknowledging frames before a non-monitor device 2342 * is added. 2343 * Must be implemented and can sleep. 2344 * 2345 * @stop: Called after last netdevice attached to the hardware 2346 * is disabled. This should turn off the hardware (at least 2347 * it must turn off frame reception.) 2348 * May be called right after add_interface if that rejects 2349 * an interface. If you added any work onto the mac80211 workqueue 2350 * you should ensure to cancel it on this callback. 2351 * Must be implemented and can sleep. 2352 * 2353 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2354 * stop transmitting and doing any other configuration, and then 2355 * ask the device to suspend. This is only invoked when WoWLAN is 2356 * configured, otherwise the device is deconfigured completely and 2357 * reconfigured at resume time. 2358 * The driver may also impose special conditions under which it 2359 * wants to use the "normal" suspend (deconfigure), say if it only 2360 * supports WoWLAN when the device is associated. In this case, it 2361 * must return 1 from this function. 2362 * 2363 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2364 * now resuming its operation, after this the device must be fully 2365 * functional again. If this returns an error, the only way out is 2366 * to also unregister the device. If it returns 1, then mac80211 2367 * will also go through the regular complete restart on resume. 2368 * 2369 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2370 * modified. The reason is that device_set_wakeup_enable() is 2371 * supposed to be called when the configuration changes, not only 2372 * in suspend(). 2373 * 2374 * @add_interface: Called when a netdevice attached to the hardware is 2375 * enabled. Because it is not called for monitor mode devices, @start 2376 * and @stop must be implemented. 2377 * The driver should perform any initialization it needs before 2378 * the device can be enabled. The initial configuration for the 2379 * interface is given in the conf parameter. 2380 * The callback may refuse to add an interface by returning a 2381 * negative error code (which will be seen in userspace.) 2382 * Must be implemented and can sleep. 2383 * 2384 * @change_interface: Called when a netdevice changes type. This callback 2385 * is optional, but only if it is supported can interface types be 2386 * switched while the interface is UP. The callback may sleep. 2387 * Note that while an interface is being switched, it will not be 2388 * found by the interface iteration callbacks. 2389 * 2390 * @remove_interface: Notifies a driver that an interface is going down. 2391 * The @stop callback is called after this if it is the last interface 2392 * and no monitor interfaces are present. 2393 * When all interfaces are removed, the MAC address in the hardware 2394 * must be cleared so the device no longer acknowledges packets, 2395 * the mac_addr member of the conf structure is, however, set to the 2396 * MAC address of the device going away. 2397 * Hence, this callback must be implemented. It can sleep. 2398 * 2399 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2400 * function to change hardware configuration, e.g., channel. 2401 * This function should never fail but returns a negative error code 2402 * if it does. The callback can sleep. 2403 * 2404 * @bss_info_changed: Handler for configuration requests related to BSS 2405 * parameters that may vary during BSS's lifespan, and may affect low 2406 * level driver (e.g. assoc/disassoc status, erp parameters). 2407 * This function should not be used if no BSS has been set, unless 2408 * for association indication. The @changed parameter indicates which 2409 * of the bss parameters has changed when a call is made. The callback 2410 * can sleep. 2411 * 2412 * @prepare_multicast: Prepare for multicast filter configuration. 2413 * This callback is optional, and its return value is passed 2414 * to configure_filter(). This callback must be atomic. 2415 * 2416 * @configure_filter: Configure the device's RX filter. 2417 * See the section "Frame filtering" for more information. 2418 * This callback must be implemented and can sleep. 2419 * 2420 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2421 * must be set or cleared for a given STA. Must be atomic. 2422 * 2423 * @set_key: See the section "Hardware crypto acceleration" 2424 * This callback is only called between add_interface and 2425 * remove_interface calls, i.e. while the given virtual interface 2426 * is enabled. 2427 * Returns a negative error code if the key can't be added. 2428 * The callback can sleep. 2429 * 2430 * @update_tkip_key: See the section "Hardware crypto acceleration" 2431 * This callback will be called in the context of Rx. Called for drivers 2432 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2433 * The callback must be atomic. 2434 * 2435 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2436 * host is suspended, it can assign this callback to retrieve the data 2437 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2438 * After rekeying was done it should (for example during resume) notify 2439 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2440 * 2441 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2442 * WEP when the device sends data packets autonomously, e.g. for ARP 2443 * offloading. The index can be 0-3, or -1 for unsetting it. 2444 * 2445 * @hw_scan: Ask the hardware to service the scan request, no need to start 2446 * the scan state machine in stack. The scan must honour the channel 2447 * configuration done by the regulatory agent in the wiphy's 2448 * registered bands. The hardware (or the driver) needs to make sure 2449 * that power save is disabled. 2450 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2451 * entire IEs after the SSID, so that drivers need not look at these 2452 * at all but just send them after the SSID -- mac80211 includes the 2453 * (extended) supported rates and HT information (where applicable). 2454 * When the scan finishes, ieee80211_scan_completed() must be called; 2455 * note that it also must be called when the scan cannot finish due to 2456 * any error unless this callback returned a negative error code. 2457 * The callback can sleep. 2458 * 2459 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2460 * The driver should ask the hardware to cancel the scan (if possible), 2461 * but the scan will be completed only after the driver will call 2462 * ieee80211_scan_completed(). 2463 * This callback is needed for wowlan, to prevent enqueueing a new 2464 * scan_work after the low-level driver was already suspended. 2465 * The callback can sleep. 2466 * 2467 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2468 * specific intervals. The driver must call the 2469 * ieee80211_sched_scan_results() function whenever it finds results. 2470 * This process will continue until sched_scan_stop is called. 2471 * 2472 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2473 * 2474 * @sw_scan_start: Notifier function that is called just before a software scan 2475 * is started. Can be NULL, if the driver doesn't need this notification. 2476 * The callback can sleep. 2477 * 2478 * @sw_scan_complete: Notifier function that is called just after a 2479 * software scan finished. Can be NULL, if the driver doesn't need 2480 * this notification. 2481 * The callback can sleep. 2482 * 2483 * @get_stats: Return low-level statistics. 2484 * Returns zero if statistics are available. 2485 * The callback can sleep. 2486 * 2487 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2488 * callback should be provided to read the TKIP transmit IVs (both IV32 2489 * and IV16) for the given key from hardware. 2490 * The callback must be atomic. 2491 * 2492 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2493 * if the device does fragmentation by itself; if this callback is 2494 * implemented then the stack will not do fragmentation. 2495 * The callback can sleep. 2496 * 2497 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2498 * The callback can sleep. 2499 * 2500 * @sta_add: Notifies low level driver about addition of an associated station, 2501 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2502 * 2503 * @sta_remove: Notifies low level driver about removal of an associated 2504 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 2505 * returns it isn't safe to use the pointer, not even RCU protected; 2506 * no RCU grace period is guaranteed between returning here and freeing 2507 * the station. See @sta_pre_rcu_remove if needed. 2508 * This callback can sleep. 2509 * 2510 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2511 * when a station is added to mac80211's station list. This callback 2512 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2513 * conditional. This callback can sleep. 2514 * 2515 * @sta_remove_debugfs: Remove the debugfs files which were added using 2516 * @sta_add_debugfs. This callback can sleep. 2517 * 2518 * @sta_notify: Notifies low level driver about power state transition of an 2519 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2520 * in AP mode, this callback will not be called when the flag 2521 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2522 * 2523 * @sta_state: Notifies low level driver about state transition of a 2524 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2525 * This callback is mutually exclusive with @sta_add/@sta_remove. 2526 * It must not fail for down transitions but may fail for transitions 2527 * up the list of states. Also note that after the callback returns it 2528 * isn't safe to use the pointer, not even RCU protected - no RCU grace 2529 * period is guaranteed between returning here and freeing the station. 2530 * See @sta_pre_rcu_remove if needed. 2531 * The callback can sleep. 2532 * 2533 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 2534 * synchronisation. This is useful if a driver needs to have station 2535 * pointers protected using RCU, it can then use this call to clear 2536 * the pointers instead of waiting for an RCU grace period to elapse 2537 * in @sta_state. 2538 * The callback can sleep. 2539 * 2540 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2541 * used to transmit to the station. The changes are advertised with bits 2542 * from &enum ieee80211_rate_control_changed and the values are reflected 2543 * in the station data. This callback should only be used when the driver 2544 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2545 * otherwise the rate control algorithm is notified directly. 2546 * Must be atomic. 2547 * 2548 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2549 * bursting) for a hardware TX queue. 2550 * Returns a negative error code on failure. 2551 * The callback can sleep. 2552 * 2553 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2554 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2555 * required function. 2556 * The callback can sleep. 2557 * 2558 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2559 * Currently, this is only used for IBSS mode debugging. Is not a 2560 * required function. 2561 * The callback can sleep. 2562 * 2563 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2564 * with other STAs in the IBSS. This is only used in IBSS mode. This 2565 * function is optional if the firmware/hardware takes full care of 2566 * TSF synchronization. 2567 * The callback can sleep. 2568 * 2569 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2570 * This is needed only for IBSS mode and the result of this function is 2571 * used to determine whether to reply to Probe Requests. 2572 * Returns non-zero if this device sent the last beacon. 2573 * The callback can sleep. 2574 * 2575 * @ampdu_action: Perform a certain A-MPDU action 2576 * The RA/TID combination determines the destination and TID we want 2577 * the ampdu action to be performed for. The action is defined through 2578 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2579 * is the first frame we expect to perform the action on. Notice 2580 * that TX/RX_STOP can pass NULL for this parameter. 2581 * The @buf_size parameter is only valid when the action is set to 2582 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2583 * buffer size (number of subframes) for this session -- the driver 2584 * may neither send aggregates containing more subframes than this 2585 * nor send aggregates in a way that lost frames would exceed the 2586 * buffer size. If just limiting the aggregate size, this would be 2587 * possible with a buf_size of 8: 2588 * - TX: 1.....7 2589 * - RX: 2....7 (lost frame #1) 2590 * - TX: 8..1... 2591 * which is invalid since #1 was now re-transmitted well past the 2592 * buffer size of 8. Correct ways to retransmit #1 would be: 2593 * - TX: 1 or 18 or 81 2594 * Even "189" would be wrong since 1 could be lost again. 2595 * 2596 * Returns a negative error code on failure. 2597 * The callback can sleep. 2598 * 2599 * @get_survey: Return per-channel survey information 2600 * 2601 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2602 * need to set wiphy->rfkill_poll to %true before registration, 2603 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2604 * The callback can sleep. 2605 * 2606 * @set_coverage_class: Set slot time for given coverage class as specified 2607 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2608 * accordingly. This callback is not required and may sleep. 2609 * 2610 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 2611 * be %NULL. The callback can sleep. 2612 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2613 * 2614 * @flush: Flush all pending frames from the hardware queue, making sure 2615 * that the hardware queues are empty. The @queues parameter is a bitmap 2616 * of queues to flush, which is useful if different virtual interfaces 2617 * use different hardware queues; it may also indicate all queues. 2618 * If the parameter @drop is set to %true, pending frames may be dropped. 2619 * The callback can sleep. 2620 * 2621 * @channel_switch: Drivers that need (or want) to offload the channel 2622 * switch operation for CSAs received from the AP may implement this 2623 * callback. They must then call ieee80211_chswitch_done() to indicate 2624 * completion of the channel switch. 2625 * 2626 * @napi_poll: Poll Rx queue for incoming data frames. 2627 * 2628 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2629 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2630 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2631 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2632 * 2633 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2634 * 2635 * @remain_on_channel: Starts an off-channel period on the given channel, must 2636 * call back to ieee80211_ready_on_channel() when on that channel. Note 2637 * that normal channel traffic is not stopped as this is intended for hw 2638 * offload. Frames to transmit on the off-channel channel are transmitted 2639 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2640 * duration (which will always be non-zero) expires, the driver must call 2641 * ieee80211_remain_on_channel_expired(). 2642 * Note that this callback may be called while the device is in IDLE and 2643 * must be accepted in this case. 2644 * This callback may sleep. 2645 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2646 * aborted before it expires. This callback may sleep. 2647 * 2648 * @set_ringparam: Set tx and rx ring sizes. 2649 * 2650 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2651 * 2652 * @tx_frames_pending: Check if there is any pending frame in the hardware 2653 * queues before entering power save. 2654 * 2655 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2656 * when transmitting a frame. Currently only legacy rates are handled. 2657 * The callback can sleep. 2658 * @rssi_callback: Notify driver when the average RSSI goes above/below 2659 * thresholds that were registered previously. The callback can sleep. 2660 * 2661 * @release_buffered_frames: Release buffered frames according to the given 2662 * parameters. In the case where the driver buffers some frames for 2663 * sleeping stations mac80211 will use this callback to tell the driver 2664 * to release some frames, either for PS-poll or uAPSD. 2665 * Note that if the @more_data paramter is %false the driver must check 2666 * if there are more frames on the given TIDs, and if there are more than 2667 * the frames being released then it must still set the more-data bit in 2668 * the frame. If the @more_data parameter is %true, then of course the 2669 * more-data bit must always be set. 2670 * The @tids parameter tells the driver which TIDs to release frames 2671 * from, for PS-poll it will always have only a single bit set. 2672 * In the case this is used for a PS-poll initiated release, the 2673 * @num_frames parameter will always be 1 so code can be shared. In 2674 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2675 * on the TX status (and must report TX status) so that the PS-poll 2676 * period is properly ended. This is used to avoid sending multiple 2677 * responses for a retried PS-poll frame. 2678 * In the case this is used for uAPSD, the @num_frames parameter may be 2679 * bigger than one, but the driver may send fewer frames (it must send 2680 * at least one, however). In this case it is also responsible for 2681 * setting the EOSP flag in the QoS header of the frames. Also, when the 2682 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2683 * on the last frame in the SP. Alternatively, it may call the function 2684 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 2685 * This callback must be atomic. 2686 * @allow_buffered_frames: Prepare device to allow the given number of frames 2687 * to go out to the given station. The frames will be sent by mac80211 2688 * via the usual TX path after this call. The TX information for frames 2689 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2690 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2691 * frames from multiple TIDs are released and the driver might reorder 2692 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2693 * on the last frame and clear it on all others and also handle the EOSP 2694 * bit in the QoS header correctly. Alternatively, it can also call the 2695 * ieee80211_sta_eosp() function. 2696 * The @tids parameter is a bitmap and tells the driver which TIDs the 2697 * frames will be on; it will at most have two bits set. 2698 * This callback must be atomic. 2699 * 2700 * @get_et_sset_count: Ethtool API to get string-set count. 2701 * 2702 * @get_et_stats: Ethtool API to get a set of u64 stats. 2703 * 2704 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2705 * and perhaps other supported types of ethtool data-sets. 2706 * 2707 * @get_rssi: Get current signal strength in dBm, the function is optional 2708 * and can sleep. 2709 * 2710 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2711 * before associated. In multi-channel scenarios, a virtual interface is 2712 * bound to a channel before it is associated, but as it isn't associated 2713 * yet it need not necessarily be given airtime, in particular since any 2714 * transmission to a P2P GO needs to be synchronized against the GO's 2715 * powersave state. mac80211 will call this function before transmitting a 2716 * management frame prior to having successfully associated to allow the 2717 * driver to give it channel time for the transmission, to get a response 2718 * and to be able to synchronize with the GO. 2719 * The callback will be called before each transmission and upon return 2720 * mac80211 will transmit the frame right away. 2721 * The callback is optional and can (should!) sleep. 2722 * 2723 * @add_chanctx: Notifies device driver about new channel context creation. 2724 * @remove_chanctx: Notifies device driver about channel context destruction. 2725 * @change_chanctx: Notifies device driver about channel context changes that 2726 * may happen when combining different virtual interfaces on the same 2727 * channel context with different settings 2728 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2729 * to vif. Possible use is for hw queue remapping. 2730 * @unassign_vif_chanctx: Notifies device driver about channel context being 2731 * unbound from vif. 2732 * @start_ap: Start operation on the AP interface, this is called after all the 2733 * information in bss_conf is set and beacon can be retrieved. A channel 2734 * context is bound before this is called. Note that if the driver uses 2735 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2736 * just "paused" for scanning/ROC, which is indicated by the beacon being 2737 * disabled/enabled via @bss_info_changed. 2738 * @stop_ap: Stop operation on the AP interface. 2739 * 2740 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2741 * reconfiguration has completed. This can help the driver implement the 2742 * reconfiguration step. Also called when reconfiguring because the 2743 * driver's resume function returned 1, as this is just like an "inline" 2744 * hardware restart. This callback may sleep. 2745 * 2746 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2747 * Currently, this is only called for managed or P2P client interfaces. 2748 * This callback is optional; it must not sleep. 2749 * 2750 * @channel_switch_beacon: Starts a channel switch to a new channel. 2751 * Beacons are modified to include CSA or ECSA IEs before calling this 2752 * function. The corresponding count fields in these IEs must be 2753 * decremented, and when they reach zero the driver must call 2754 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 2755 * get the csa counter decremented by mac80211, but must check if it is 2756 * zero using ieee80211_csa_is_complete() after the beacon has been 2757 * transmitted and then call ieee80211_csa_finish(). 2758 * 2759 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 2760 * information in bss_conf is set up and the beacon can be retrieved. A 2761 * channel context is bound before this is called. 2762 * @leave_ibss: Leave the IBSS again. 2763 */ 2764 struct ieee80211_ops { 2765 void (*tx)(struct ieee80211_hw *hw, 2766 struct ieee80211_tx_control *control, 2767 struct sk_buff *skb); 2768 int (*start)(struct ieee80211_hw *hw); 2769 void (*stop)(struct ieee80211_hw *hw); 2770 #ifdef CONFIG_PM 2771 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2772 int (*resume)(struct ieee80211_hw *hw); 2773 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2774 #endif 2775 int (*add_interface)(struct ieee80211_hw *hw, 2776 struct ieee80211_vif *vif); 2777 int (*change_interface)(struct ieee80211_hw *hw, 2778 struct ieee80211_vif *vif, 2779 enum nl80211_iftype new_type, bool p2p); 2780 void (*remove_interface)(struct ieee80211_hw *hw, 2781 struct ieee80211_vif *vif); 2782 int (*config)(struct ieee80211_hw *hw, u32 changed); 2783 void (*bss_info_changed)(struct ieee80211_hw *hw, 2784 struct ieee80211_vif *vif, 2785 struct ieee80211_bss_conf *info, 2786 u32 changed); 2787 2788 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2789 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2790 2791 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2792 struct netdev_hw_addr_list *mc_list); 2793 void (*configure_filter)(struct ieee80211_hw *hw, 2794 unsigned int changed_flags, 2795 unsigned int *total_flags, 2796 u64 multicast); 2797 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2798 bool set); 2799 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2800 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2801 struct ieee80211_key_conf *key); 2802 void (*update_tkip_key)(struct ieee80211_hw *hw, 2803 struct ieee80211_vif *vif, 2804 struct ieee80211_key_conf *conf, 2805 struct ieee80211_sta *sta, 2806 u32 iv32, u16 *phase1key); 2807 void (*set_rekey_data)(struct ieee80211_hw *hw, 2808 struct ieee80211_vif *vif, 2809 struct cfg80211_gtk_rekey_data *data); 2810 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2811 struct ieee80211_vif *vif, int idx); 2812 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2813 struct cfg80211_scan_request *req); 2814 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2815 struct ieee80211_vif *vif); 2816 int (*sched_scan_start)(struct ieee80211_hw *hw, 2817 struct ieee80211_vif *vif, 2818 struct cfg80211_sched_scan_request *req, 2819 struct ieee80211_sched_scan_ies *ies); 2820 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2821 struct ieee80211_vif *vif); 2822 void (*sw_scan_start)(struct ieee80211_hw *hw); 2823 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2824 int (*get_stats)(struct ieee80211_hw *hw, 2825 struct ieee80211_low_level_stats *stats); 2826 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2827 u32 *iv32, u16 *iv16); 2828 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2829 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2830 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2831 struct ieee80211_sta *sta); 2832 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2833 struct ieee80211_sta *sta); 2834 #ifdef CONFIG_MAC80211_DEBUGFS 2835 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2836 struct ieee80211_vif *vif, 2837 struct ieee80211_sta *sta, 2838 struct dentry *dir); 2839 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2840 struct ieee80211_vif *vif, 2841 struct ieee80211_sta *sta, 2842 struct dentry *dir); 2843 #endif 2844 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2845 enum sta_notify_cmd, struct ieee80211_sta *sta); 2846 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2847 struct ieee80211_sta *sta, 2848 enum ieee80211_sta_state old_state, 2849 enum ieee80211_sta_state new_state); 2850 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 2851 struct ieee80211_vif *vif, 2852 struct ieee80211_sta *sta); 2853 void (*sta_rc_update)(struct ieee80211_hw *hw, 2854 struct ieee80211_vif *vif, 2855 struct ieee80211_sta *sta, 2856 u32 changed); 2857 int (*conf_tx)(struct ieee80211_hw *hw, 2858 struct ieee80211_vif *vif, u16 ac, 2859 const struct ieee80211_tx_queue_params *params); 2860 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2861 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2862 u64 tsf); 2863 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2864 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2865 int (*ampdu_action)(struct ieee80211_hw *hw, 2866 struct ieee80211_vif *vif, 2867 enum ieee80211_ampdu_mlme_action action, 2868 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2869 u8 buf_size); 2870 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2871 struct survey_info *survey); 2872 void (*rfkill_poll)(struct ieee80211_hw *hw); 2873 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2874 #ifdef CONFIG_NL80211_TESTMODE 2875 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2876 void *data, int len); 2877 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2878 struct netlink_callback *cb, 2879 void *data, int len); 2880 #endif 2881 void (*flush)(struct ieee80211_hw *hw, u32 queues, bool drop); 2882 void (*channel_switch)(struct ieee80211_hw *hw, 2883 struct ieee80211_channel_switch *ch_switch); 2884 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2885 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2886 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2887 2888 int (*remain_on_channel)(struct ieee80211_hw *hw, 2889 struct ieee80211_vif *vif, 2890 struct ieee80211_channel *chan, 2891 int duration, 2892 enum ieee80211_roc_type type); 2893 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2894 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2895 void (*get_ringparam)(struct ieee80211_hw *hw, 2896 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2897 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2898 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2899 const struct cfg80211_bitrate_mask *mask); 2900 void (*rssi_callback)(struct ieee80211_hw *hw, 2901 struct ieee80211_vif *vif, 2902 enum ieee80211_rssi_event rssi_event); 2903 2904 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2905 struct ieee80211_sta *sta, 2906 u16 tids, int num_frames, 2907 enum ieee80211_frame_release_type reason, 2908 bool more_data); 2909 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2910 struct ieee80211_sta *sta, 2911 u16 tids, int num_frames, 2912 enum ieee80211_frame_release_type reason, 2913 bool more_data); 2914 2915 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2916 struct ieee80211_vif *vif, int sset); 2917 void (*get_et_stats)(struct ieee80211_hw *hw, 2918 struct ieee80211_vif *vif, 2919 struct ethtool_stats *stats, u64 *data); 2920 void (*get_et_strings)(struct ieee80211_hw *hw, 2921 struct ieee80211_vif *vif, 2922 u32 sset, u8 *data); 2923 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2924 struct ieee80211_sta *sta, s8 *rssi_dbm); 2925 2926 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2927 struct ieee80211_vif *vif); 2928 2929 int (*add_chanctx)(struct ieee80211_hw *hw, 2930 struct ieee80211_chanctx_conf *ctx); 2931 void (*remove_chanctx)(struct ieee80211_hw *hw, 2932 struct ieee80211_chanctx_conf *ctx); 2933 void (*change_chanctx)(struct ieee80211_hw *hw, 2934 struct ieee80211_chanctx_conf *ctx, 2935 u32 changed); 2936 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2937 struct ieee80211_vif *vif, 2938 struct ieee80211_chanctx_conf *ctx); 2939 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2940 struct ieee80211_vif *vif, 2941 struct ieee80211_chanctx_conf *ctx); 2942 2943 void (*restart_complete)(struct ieee80211_hw *hw); 2944 2945 #if IS_ENABLED(CONFIG_IPV6) 2946 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2947 struct ieee80211_vif *vif, 2948 struct inet6_dev *idev); 2949 #endif 2950 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 2951 struct ieee80211_vif *vif, 2952 struct cfg80211_chan_def *chandef); 2953 2954 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2955 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2956 }; 2957 2958 /** 2959 * ieee80211_alloc_hw - Allocate a new hardware device 2960 * 2961 * This must be called once for each hardware device. The returned pointer 2962 * must be used to refer to this device when calling other functions. 2963 * mac80211 allocates a private data area for the driver pointed to by 2964 * @priv in &struct ieee80211_hw, the size of this area is given as 2965 * @priv_data_len. 2966 * 2967 * @priv_data_len: length of private data 2968 * @ops: callbacks for this device 2969 * 2970 * Return: A pointer to the new hardware device, or %NULL on error. 2971 */ 2972 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2973 const struct ieee80211_ops *ops); 2974 2975 /** 2976 * ieee80211_register_hw - Register hardware device 2977 * 2978 * You must call this function before any other functions in 2979 * mac80211. Note that before a hardware can be registered, you 2980 * need to fill the contained wiphy's information. 2981 * 2982 * @hw: the device to register as returned by ieee80211_alloc_hw() 2983 * 2984 * Return: 0 on success. An error code otherwise. 2985 */ 2986 int ieee80211_register_hw(struct ieee80211_hw *hw); 2987 2988 /** 2989 * struct ieee80211_tpt_blink - throughput blink description 2990 * @throughput: throughput in Kbit/sec 2991 * @blink_time: blink time in milliseconds 2992 * (full cycle, ie. one off + one on period) 2993 */ 2994 struct ieee80211_tpt_blink { 2995 int throughput; 2996 int blink_time; 2997 }; 2998 2999 /** 3000 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3001 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3002 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3003 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3004 * interface is connected in some way, including being an AP 3005 */ 3006 enum ieee80211_tpt_led_trigger_flags { 3007 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3008 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3009 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3010 }; 3011 3012 #ifdef CONFIG_MAC80211_LEDS 3013 char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3014 char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3015 char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3016 char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3017 char *__ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3018 unsigned int flags, 3019 const struct ieee80211_tpt_blink *blink_table, 3020 unsigned int blink_table_len); 3021 #endif 3022 /** 3023 * ieee80211_get_tx_led_name - get name of TX LED 3024 * 3025 * mac80211 creates a transmit LED trigger for each wireless hardware 3026 * that can be used to drive LEDs if your driver registers a LED device. 3027 * This function returns the name (or %NULL if not configured for LEDs) 3028 * of the trigger so you can automatically link the LED device. 3029 * 3030 * @hw: the hardware to get the LED trigger name for 3031 * 3032 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3033 */ 3034 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3035 { 3036 #ifdef CONFIG_MAC80211_LEDS 3037 return __ieee80211_get_tx_led_name(hw); 3038 #else 3039 return NULL; 3040 #endif 3041 } 3042 3043 /** 3044 * ieee80211_get_rx_led_name - get name of RX LED 3045 * 3046 * mac80211 creates a receive LED trigger for each wireless hardware 3047 * that can be used to drive LEDs if your driver registers a LED device. 3048 * This function returns the name (or %NULL if not configured for LEDs) 3049 * of the trigger so you can automatically link the LED device. 3050 * 3051 * @hw: the hardware to get the LED trigger name for 3052 * 3053 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3054 */ 3055 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3056 { 3057 #ifdef CONFIG_MAC80211_LEDS 3058 return __ieee80211_get_rx_led_name(hw); 3059 #else 3060 return NULL; 3061 #endif 3062 } 3063 3064 /** 3065 * ieee80211_get_assoc_led_name - get name of association LED 3066 * 3067 * mac80211 creates a association LED trigger for each wireless hardware 3068 * that can be used to drive LEDs if your driver registers a LED device. 3069 * This function returns the name (or %NULL if not configured for LEDs) 3070 * of the trigger so you can automatically link the LED device. 3071 * 3072 * @hw: the hardware to get the LED trigger name for 3073 * 3074 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3075 */ 3076 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3077 { 3078 #ifdef CONFIG_MAC80211_LEDS 3079 return __ieee80211_get_assoc_led_name(hw); 3080 #else 3081 return NULL; 3082 #endif 3083 } 3084 3085 /** 3086 * ieee80211_get_radio_led_name - get name of radio LED 3087 * 3088 * mac80211 creates a radio change LED trigger for each wireless hardware 3089 * that can be used to drive LEDs if your driver registers a LED device. 3090 * This function returns the name (or %NULL if not configured for LEDs) 3091 * of the trigger so you can automatically link the LED device. 3092 * 3093 * @hw: the hardware to get the LED trigger name for 3094 * 3095 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3096 */ 3097 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3098 { 3099 #ifdef CONFIG_MAC80211_LEDS 3100 return __ieee80211_get_radio_led_name(hw); 3101 #else 3102 return NULL; 3103 #endif 3104 } 3105 3106 /** 3107 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3108 * @hw: the hardware to create the trigger for 3109 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3110 * @blink_table: the blink table -- needs to be ordered by throughput 3111 * @blink_table_len: size of the blink table 3112 * 3113 * Return: %NULL (in case of error, or if no LED triggers are 3114 * configured) or the name of the new trigger. 3115 * 3116 * Note: This function must be called before ieee80211_register_hw(). 3117 */ 3118 static inline char * 3119 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3120 const struct ieee80211_tpt_blink *blink_table, 3121 unsigned int blink_table_len) 3122 { 3123 #ifdef CONFIG_MAC80211_LEDS 3124 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3125 blink_table_len); 3126 #else 3127 return NULL; 3128 #endif 3129 } 3130 3131 /** 3132 * ieee80211_unregister_hw - Unregister a hardware device 3133 * 3134 * This function instructs mac80211 to free allocated resources 3135 * and unregister netdevices from the networking subsystem. 3136 * 3137 * @hw: the hardware to unregister 3138 */ 3139 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3140 3141 /** 3142 * ieee80211_free_hw - free hardware descriptor 3143 * 3144 * This function frees everything that was allocated, including the 3145 * private data for the driver. You must call ieee80211_unregister_hw() 3146 * before calling this function. 3147 * 3148 * @hw: the hardware to free 3149 */ 3150 void ieee80211_free_hw(struct ieee80211_hw *hw); 3151 3152 /** 3153 * ieee80211_restart_hw - restart hardware completely 3154 * 3155 * Call this function when the hardware was restarted for some reason 3156 * (hardware error, ...) and the driver is unable to restore its state 3157 * by itself. mac80211 assumes that at this point the driver/hardware 3158 * is completely uninitialised and stopped, it starts the process by 3159 * calling the ->start() operation. The driver will need to reset all 3160 * internal state that it has prior to calling this function. 3161 * 3162 * @hw: the hardware to restart 3163 */ 3164 void ieee80211_restart_hw(struct ieee80211_hw *hw); 3165 3166 /** ieee80211_napi_schedule - schedule NAPI poll 3167 * 3168 * Use this function to schedule NAPI polling on a device. 3169 * 3170 * @hw: the hardware to start polling 3171 */ 3172 void ieee80211_napi_schedule(struct ieee80211_hw *hw); 3173 3174 /** ieee80211_napi_complete - complete NAPI polling 3175 * 3176 * Use this function to finish NAPI polling on a device. 3177 * 3178 * @hw: the hardware to stop polling 3179 */ 3180 void ieee80211_napi_complete(struct ieee80211_hw *hw); 3181 3182 /** 3183 * ieee80211_rx - receive frame 3184 * 3185 * Use this function to hand received frames to mac80211. The receive 3186 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3187 * paged @skb is used, the driver is recommended to put the ieee80211 3188 * header of the frame on the linear part of the @skb to avoid memory 3189 * allocation and/or memcpy by the stack. 3190 * 3191 * This function may not be called in IRQ context. Calls to this function 3192 * for a single hardware must be synchronized against each other. Calls to 3193 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3194 * mixed for a single hardware. Must not run concurrently with 3195 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3196 * 3197 * In process context use instead ieee80211_rx_ni(). 3198 * 3199 * @hw: the hardware this frame came in on 3200 * @skb: the buffer to receive, owned by mac80211 after this call 3201 */ 3202 void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 3203 3204 /** 3205 * ieee80211_rx_irqsafe - receive frame 3206 * 3207 * Like ieee80211_rx() but can be called in IRQ context 3208 * (internally defers to a tasklet.) 3209 * 3210 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3211 * be mixed for a single hardware.Must not run concurrently with 3212 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3213 * 3214 * @hw: the hardware this frame came in on 3215 * @skb: the buffer to receive, owned by mac80211 after this call 3216 */ 3217 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3218 3219 /** 3220 * ieee80211_rx_ni - receive frame (in process context) 3221 * 3222 * Like ieee80211_rx() but can be called in process context 3223 * (internally disables bottom halves). 3224 * 3225 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3226 * not be mixed for a single hardware. Must not run concurrently with 3227 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3228 * 3229 * @hw: the hardware this frame came in on 3230 * @skb: the buffer to receive, owned by mac80211 after this call 3231 */ 3232 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3233 struct sk_buff *skb) 3234 { 3235 local_bh_disable(); 3236 ieee80211_rx(hw, skb); 3237 local_bh_enable(); 3238 } 3239 3240 /** 3241 * ieee80211_sta_ps_transition - PS transition for connected sta 3242 * 3243 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3244 * flag set, use this function to inform mac80211 about a connected station 3245 * entering/leaving PS mode. 3246 * 3247 * This function may not be called in IRQ context or with softirqs enabled. 3248 * 3249 * Calls to this function for a single hardware must be synchronized against 3250 * each other. 3251 * 3252 * @sta: currently connected sta 3253 * @start: start or stop PS 3254 * 3255 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3256 */ 3257 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3258 3259 /** 3260 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3261 * (in process context) 3262 * 3263 * Like ieee80211_sta_ps_transition() but can be called in process context 3264 * (internally disables bottom halves). Concurrent call restriction still 3265 * applies. 3266 * 3267 * @sta: currently connected sta 3268 * @start: start or stop PS 3269 * 3270 * Return: Like ieee80211_sta_ps_transition(). 3271 */ 3272 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3273 bool start) 3274 { 3275 int ret; 3276 3277 local_bh_disable(); 3278 ret = ieee80211_sta_ps_transition(sta, start); 3279 local_bh_enable(); 3280 3281 return ret; 3282 } 3283 3284 /* 3285 * The TX headroom reserved by mac80211 for its own tx_status functions. 3286 * This is enough for the radiotap header. 3287 */ 3288 #define IEEE80211_TX_STATUS_HEADROOM 14 3289 3290 /** 3291 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3292 * @sta: &struct ieee80211_sta pointer for the sleeping station 3293 * @tid: the TID that has buffered frames 3294 * @buffered: indicates whether or not frames are buffered for this TID 3295 * 3296 * If a driver buffers frames for a powersave station instead of passing 3297 * them back to mac80211 for retransmission, the station may still need 3298 * to be told that there are buffered frames via the TIM bit. 3299 * 3300 * This function informs mac80211 whether or not there are frames that are 3301 * buffered in the driver for a given TID; mac80211 can then use this data 3302 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3303 * call! Beware of the locking!) 3304 * 3305 * If all frames are released to the station (due to PS-poll or uAPSD) 3306 * then the driver needs to inform mac80211 that there no longer are 3307 * frames buffered. However, when the station wakes up mac80211 assumes 3308 * that all buffered frames will be transmitted and clears this data, 3309 * drivers need to make sure they inform mac80211 about all buffered 3310 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3311 * 3312 * Note that technically mac80211 only needs to know this per AC, not per 3313 * TID, but since driver buffering will inevitably happen per TID (since 3314 * it is related to aggregation) it is easier to make mac80211 map the 3315 * TID to the AC as required instead of keeping track in all drivers that 3316 * use this API. 3317 */ 3318 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3319 u8 tid, bool buffered); 3320 3321 /** 3322 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 3323 * 3324 * Call this function in a driver with per-packet rate selection support 3325 * to combine the rate info in the packet tx info with the most recent 3326 * rate selection table for the station entry. 3327 * 3328 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3329 * @sta: the receiver station to which this packet is sent. 3330 * @skb: the frame to be transmitted. 3331 * @dest: buffer for extracted rate/retry information 3332 * @max_rates: maximum number of rates to fetch 3333 */ 3334 void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 3335 struct ieee80211_sta *sta, 3336 struct sk_buff *skb, 3337 struct ieee80211_tx_rate *dest, 3338 int max_rates); 3339 3340 /** 3341 * ieee80211_tx_status - transmit status callback 3342 * 3343 * Call this function for all transmitted frames after they have been 3344 * transmitted. It is permissible to not call this function for 3345 * multicast frames but this can affect statistics. 3346 * 3347 * This function may not be called in IRQ context. Calls to this function 3348 * for a single hardware must be synchronized against each other. Calls 3349 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3350 * may not be mixed for a single hardware. Must not run concurrently with 3351 * ieee80211_rx() or ieee80211_rx_ni(). 3352 * 3353 * @hw: the hardware the frame was transmitted by 3354 * @skb: the frame that was transmitted, owned by mac80211 after this call 3355 */ 3356 void ieee80211_tx_status(struct ieee80211_hw *hw, 3357 struct sk_buff *skb); 3358 3359 /** 3360 * ieee80211_tx_status_ni - transmit status callback (in process context) 3361 * 3362 * Like ieee80211_tx_status() but can be called in process context. 3363 * 3364 * Calls to this function, ieee80211_tx_status() and 3365 * ieee80211_tx_status_irqsafe() may not be mixed 3366 * for a single hardware. 3367 * 3368 * @hw: the hardware the frame was transmitted by 3369 * @skb: the frame that was transmitted, owned by mac80211 after this call 3370 */ 3371 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3372 struct sk_buff *skb) 3373 { 3374 local_bh_disable(); 3375 ieee80211_tx_status(hw, skb); 3376 local_bh_enable(); 3377 } 3378 3379 /** 3380 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3381 * 3382 * Like ieee80211_tx_status() but can be called in IRQ context 3383 * (internally defers to a tasklet.) 3384 * 3385 * Calls to this function, ieee80211_tx_status() and 3386 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3387 * 3388 * @hw: the hardware the frame was transmitted by 3389 * @skb: the frame that was transmitted, owned by mac80211 after this call 3390 */ 3391 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3392 struct sk_buff *skb); 3393 3394 /** 3395 * ieee80211_report_low_ack - report non-responding station 3396 * 3397 * When operating in AP-mode, call this function to report a non-responding 3398 * connected STA. 3399 * 3400 * @sta: the non-responding connected sta 3401 * @num_packets: number of packets sent to @sta without a response 3402 */ 3403 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3404 3405 /** 3406 * ieee80211_beacon_get_tim - beacon generation function 3407 * @hw: pointer obtained from ieee80211_alloc_hw(). 3408 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3409 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3410 * Set to 0 if invalid (in non-AP modes). 3411 * @tim_length: pointer to variable that will receive the TIM IE length, 3412 * (including the ID and length bytes!). 3413 * Set to 0 if invalid (in non-AP modes). 3414 * 3415 * If the driver implements beaconing modes, it must use this function to 3416 * obtain the beacon frame/template. 3417 * 3418 * If the beacon frames are generated by the host system (i.e., not in 3419 * hardware/firmware), the driver uses this function to get each beacon 3420 * frame from mac80211 -- it is responsible for calling this function 3421 * before the beacon is needed (e.g. based on hardware interrupt). 3422 * 3423 * If the beacon frames are generated by the device, then the driver 3424 * must use the returned beacon as the template and change the TIM IE 3425 * according to the current DTIM parameters/TIM bitmap. 3426 * 3427 * The driver is responsible for freeing the returned skb. 3428 * 3429 * Return: The beacon template. %NULL on error. 3430 */ 3431 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3432 struct ieee80211_vif *vif, 3433 u16 *tim_offset, u16 *tim_length); 3434 3435 /** 3436 * ieee80211_beacon_get - beacon generation function 3437 * @hw: pointer obtained from ieee80211_alloc_hw(). 3438 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3439 * 3440 * See ieee80211_beacon_get_tim(). 3441 * 3442 * Return: See ieee80211_beacon_get_tim(). 3443 */ 3444 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3445 struct ieee80211_vif *vif) 3446 { 3447 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3448 } 3449 3450 /** 3451 * ieee80211_csa_finish - notify mac80211 about channel switch 3452 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3453 * 3454 * After a channel switch announcement was scheduled and the counter in this 3455 * announcement hit zero, this function must be called by the driver to 3456 * notify mac80211 that the channel can be changed. 3457 */ 3458 void ieee80211_csa_finish(struct ieee80211_vif *vif); 3459 3460 /** 3461 * ieee80211_csa_is_complete - find out if counters reached zero 3462 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3463 * 3464 * This function returns whether the channel switch counters reached zero. 3465 */ 3466 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 3467 3468 3469 /** 3470 * ieee80211_proberesp_get - retrieve a Probe Response template 3471 * @hw: pointer obtained from ieee80211_alloc_hw(). 3472 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3473 * 3474 * Creates a Probe Response template which can, for example, be uploaded to 3475 * hardware. The destination address should be set by the caller. 3476 * 3477 * Can only be called in AP mode. 3478 * 3479 * Return: The Probe Response template. %NULL on error. 3480 */ 3481 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3482 struct ieee80211_vif *vif); 3483 3484 /** 3485 * ieee80211_pspoll_get - retrieve a PS Poll template 3486 * @hw: pointer obtained from ieee80211_alloc_hw(). 3487 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3488 * 3489 * Creates a PS Poll a template which can, for example, uploaded to 3490 * hardware. The template must be updated after association so that correct 3491 * AID, BSSID and MAC address is used. 3492 * 3493 * Note: Caller (or hardware) is responsible for setting the 3494 * &IEEE80211_FCTL_PM bit. 3495 * 3496 * Return: The PS Poll template. %NULL on error. 3497 */ 3498 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3499 struct ieee80211_vif *vif); 3500 3501 /** 3502 * ieee80211_nullfunc_get - retrieve a nullfunc template 3503 * @hw: pointer obtained from ieee80211_alloc_hw(). 3504 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3505 * 3506 * Creates a Nullfunc template which can, for example, uploaded to 3507 * hardware. The template must be updated after association so that correct 3508 * BSSID and address is used. 3509 * 3510 * Note: Caller (or hardware) is responsible for setting the 3511 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3512 * 3513 * Return: The nullfunc template. %NULL on error. 3514 */ 3515 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3516 struct ieee80211_vif *vif); 3517 3518 /** 3519 * ieee80211_probereq_get - retrieve a Probe Request template 3520 * @hw: pointer obtained from ieee80211_alloc_hw(). 3521 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3522 * @ssid: SSID buffer 3523 * @ssid_len: length of SSID 3524 * @tailroom: tailroom to reserve at end of SKB for IEs 3525 * 3526 * Creates a Probe Request template which can, for example, be uploaded to 3527 * hardware. 3528 * 3529 * Return: The Probe Request template. %NULL on error. 3530 */ 3531 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3532 struct ieee80211_vif *vif, 3533 const u8 *ssid, size_t ssid_len, 3534 size_t tailroom); 3535 3536 /** 3537 * ieee80211_rts_get - RTS frame generation function 3538 * @hw: pointer obtained from ieee80211_alloc_hw(). 3539 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3540 * @frame: pointer to the frame that is going to be protected by the RTS. 3541 * @frame_len: the frame length (in octets). 3542 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3543 * @rts: The buffer where to store the RTS frame. 3544 * 3545 * If the RTS frames are generated by the host system (i.e., not in 3546 * hardware/firmware), the low-level driver uses this function to receive 3547 * the next RTS frame from the 802.11 code. The low-level is responsible 3548 * for calling this function before and RTS frame is needed. 3549 */ 3550 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3551 const void *frame, size_t frame_len, 3552 const struct ieee80211_tx_info *frame_txctl, 3553 struct ieee80211_rts *rts); 3554 3555 /** 3556 * ieee80211_rts_duration - Get the duration field for an RTS frame 3557 * @hw: pointer obtained from ieee80211_alloc_hw(). 3558 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3559 * @frame_len: the length of the frame that is going to be protected by the RTS. 3560 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3561 * 3562 * If the RTS is generated in firmware, but the host system must provide 3563 * the duration field, the low-level driver uses this function to receive 3564 * the duration field value in little-endian byteorder. 3565 * 3566 * Return: The duration. 3567 */ 3568 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3569 struct ieee80211_vif *vif, size_t frame_len, 3570 const struct ieee80211_tx_info *frame_txctl); 3571 3572 /** 3573 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3574 * @hw: pointer obtained from ieee80211_alloc_hw(). 3575 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3576 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3577 * @frame_len: the frame length (in octets). 3578 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3579 * @cts: The buffer where to store the CTS-to-self frame. 3580 * 3581 * If the CTS-to-self frames are generated by the host system (i.e., not in 3582 * hardware/firmware), the low-level driver uses this function to receive 3583 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3584 * for calling this function before and CTS-to-self frame is needed. 3585 */ 3586 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3587 struct ieee80211_vif *vif, 3588 const void *frame, size_t frame_len, 3589 const struct ieee80211_tx_info *frame_txctl, 3590 struct ieee80211_cts *cts); 3591 3592 /** 3593 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3594 * @hw: pointer obtained from ieee80211_alloc_hw(). 3595 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3596 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3597 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3598 * 3599 * If the CTS-to-self is generated in firmware, but the host system must provide 3600 * the duration field, the low-level driver uses this function to receive 3601 * the duration field value in little-endian byteorder. 3602 * 3603 * Return: The duration. 3604 */ 3605 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3606 struct ieee80211_vif *vif, 3607 size_t frame_len, 3608 const struct ieee80211_tx_info *frame_txctl); 3609 3610 /** 3611 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3612 * @hw: pointer obtained from ieee80211_alloc_hw(). 3613 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3614 * @band: the band to calculate the frame duration on 3615 * @frame_len: the length of the frame. 3616 * @rate: the rate at which the frame is going to be transmitted. 3617 * 3618 * Calculate the duration field of some generic frame, given its 3619 * length and transmission rate (in 100kbps). 3620 * 3621 * Return: The duration. 3622 */ 3623 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3624 struct ieee80211_vif *vif, 3625 enum ieee80211_band band, 3626 size_t frame_len, 3627 struct ieee80211_rate *rate); 3628 3629 /** 3630 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3631 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3632 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3633 * 3634 * Function for accessing buffered broadcast and multicast frames. If 3635 * hardware/firmware does not implement buffering of broadcast/multicast 3636 * frames when power saving is used, 802.11 code buffers them in the host 3637 * memory. The low-level driver uses this function to fetch next buffered 3638 * frame. In most cases, this is used when generating beacon frame. 3639 * 3640 * Return: A pointer to the next buffered skb or NULL if no more buffered 3641 * frames are available. 3642 * 3643 * Note: buffered frames are returned only after DTIM beacon frame was 3644 * generated with ieee80211_beacon_get() and the low-level driver must thus 3645 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3646 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3647 * does not need to check for DTIM beacons separately and should be able to 3648 * use common code for all beacons. 3649 */ 3650 struct sk_buff * 3651 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3652 3653 /** 3654 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3655 * 3656 * This function returns the TKIP phase 1 key for the given IV32. 3657 * 3658 * @keyconf: the parameter passed with the set key 3659 * @iv32: IV32 to get the P1K for 3660 * @p1k: a buffer to which the key will be written, as 5 u16 values 3661 */ 3662 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3663 u32 iv32, u16 *p1k); 3664 3665 /** 3666 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3667 * 3668 * This function returns the TKIP phase 1 key for the IV32 taken 3669 * from the given packet. 3670 * 3671 * @keyconf: the parameter passed with the set key 3672 * @skb: the packet to take the IV32 value from that will be encrypted 3673 * with this P1K 3674 * @p1k: a buffer to which the key will be written, as 5 u16 values 3675 */ 3676 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3677 struct sk_buff *skb, u16 *p1k) 3678 { 3679 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3680 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3681 u32 iv32 = get_unaligned_le32(&data[4]); 3682 3683 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3684 } 3685 3686 /** 3687 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3688 * 3689 * This function returns the TKIP phase 1 key for the given IV32 3690 * and transmitter address. 3691 * 3692 * @keyconf: the parameter passed with the set key 3693 * @ta: TA that will be used with the key 3694 * @iv32: IV32 to get the P1K for 3695 * @p1k: a buffer to which the key will be written, as 5 u16 values 3696 */ 3697 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3698 const u8 *ta, u32 iv32, u16 *p1k); 3699 3700 /** 3701 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3702 * 3703 * This function computes the TKIP RC4 key for the IV values 3704 * in the packet. 3705 * 3706 * @keyconf: the parameter passed with the set key 3707 * @skb: the packet to take the IV32/IV16 values from that will be 3708 * encrypted with this key 3709 * @p2k: a buffer to which the key will be written, 16 bytes 3710 */ 3711 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3712 struct sk_buff *skb, u8 *p2k); 3713 3714 /** 3715 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3716 * 3717 * This function computes the two AES-CMAC sub-keys, based on the 3718 * previously installed master key. 3719 * 3720 * @keyconf: the parameter passed with the set key 3721 * @k1: a buffer to be filled with the 1st sub-key 3722 * @k2: a buffer to be filled with the 2nd sub-key 3723 */ 3724 void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3725 u8 *k1, u8 *k2); 3726 3727 /** 3728 * struct ieee80211_key_seq - key sequence counter 3729 * 3730 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3731 * @ccmp: PN data, most significant byte first (big endian, 3732 * reverse order than in packet) 3733 * @aes_cmac: PN data, most significant byte first (big endian, 3734 * reverse order than in packet) 3735 */ 3736 struct ieee80211_key_seq { 3737 union { 3738 struct { 3739 u32 iv32; 3740 u16 iv16; 3741 } tkip; 3742 struct { 3743 u8 pn[6]; 3744 } ccmp; 3745 struct { 3746 u8 pn[6]; 3747 } aes_cmac; 3748 }; 3749 }; 3750 3751 /** 3752 * ieee80211_get_key_tx_seq - get key TX sequence counter 3753 * 3754 * @keyconf: the parameter passed with the set key 3755 * @seq: buffer to receive the sequence data 3756 * 3757 * This function allows a driver to retrieve the current TX IV/PN 3758 * for the given key. It must not be called if IV generation is 3759 * offloaded to the device. 3760 * 3761 * Note that this function may only be called when no TX processing 3762 * can be done concurrently, for example when queues are stopped 3763 * and the stop has been synchronized. 3764 */ 3765 void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3766 struct ieee80211_key_seq *seq); 3767 3768 /** 3769 * ieee80211_get_key_rx_seq - get key RX sequence counter 3770 * 3771 * @keyconf: the parameter passed with the set key 3772 * @tid: The TID, or -1 for the management frame value (CCMP only); 3773 * the value on TID 0 is also used for non-QoS frames. For 3774 * CMAC, only TID 0 is valid. 3775 * @seq: buffer to receive the sequence data 3776 * 3777 * This function allows a driver to retrieve the current RX IV/PNs 3778 * for the given key. It must not be called if IV checking is done 3779 * by the device and not by mac80211. 3780 * 3781 * Note that this function may only be called when no RX processing 3782 * can be done concurrently. 3783 */ 3784 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3785 int tid, struct ieee80211_key_seq *seq); 3786 3787 /** 3788 * ieee80211_set_key_tx_seq - set key TX sequence counter 3789 * 3790 * @keyconf: the parameter passed with the set key 3791 * @seq: new sequence data 3792 * 3793 * This function allows a driver to set the current TX IV/PNs for the 3794 * given key. This is useful when resuming from WoWLAN sleep and the 3795 * device may have transmitted frames using the PTK, e.g. replies to 3796 * ARP requests. 3797 * 3798 * Note that this function may only be called when no TX processing 3799 * can be done concurrently. 3800 */ 3801 void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf, 3802 struct ieee80211_key_seq *seq); 3803 3804 /** 3805 * ieee80211_set_key_rx_seq - set key RX sequence counter 3806 * 3807 * @keyconf: the parameter passed with the set key 3808 * @tid: The TID, or -1 for the management frame value (CCMP only); 3809 * the value on TID 0 is also used for non-QoS frames. For 3810 * CMAC, only TID 0 is valid. 3811 * @seq: new sequence data 3812 * 3813 * This function allows a driver to set the current RX IV/PNs for the 3814 * given key. This is useful when resuming from WoWLAN sleep and GTK 3815 * rekey may have been done while suspended. It should not be called 3816 * if IV checking is done by the device and not by mac80211. 3817 * 3818 * Note that this function may only be called when no RX processing 3819 * can be done concurrently. 3820 */ 3821 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 3822 int tid, struct ieee80211_key_seq *seq); 3823 3824 /** 3825 * ieee80211_remove_key - remove the given key 3826 * @keyconf: the parameter passed with the set key 3827 * 3828 * Remove the given key. If the key was uploaded to the hardware at the 3829 * time this function is called, it is not deleted in the hardware but 3830 * instead assumed to have been removed already. 3831 * 3832 * Note that due to locking considerations this function can (currently) 3833 * only be called during key iteration (ieee80211_iter_keys().) 3834 */ 3835 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 3836 3837 /** 3838 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 3839 * @vif: the virtual interface to add the key on 3840 * @keyconf: new key data 3841 * 3842 * When GTK rekeying was done while the system was suspended, (a) new 3843 * key(s) will be available. These will be needed by mac80211 for proper 3844 * RX processing, so this function allows setting them. 3845 * 3846 * The function returns the newly allocated key structure, which will 3847 * have similar contents to the passed key configuration but point to 3848 * mac80211-owned memory. In case of errors, the function returns an 3849 * ERR_PTR(), use IS_ERR() etc. 3850 * 3851 * Note that this function assumes the key isn't added to hardware 3852 * acceleration, so no TX will be done with the key. Since it's a GTK 3853 * on managed (station) networks, this is true anyway. If the driver 3854 * calls this function from the resume callback and subsequently uses 3855 * the return code 1 to reconfigure the device, this key will be part 3856 * of the reconfiguration. 3857 * 3858 * Note that the driver should also call ieee80211_set_key_rx_seq() 3859 * for the new key for each TID to set up sequence counters properly. 3860 * 3861 * IMPORTANT: If this replaces a key that is present in the hardware, 3862 * then it will attempt to remove it during this call. In many cases 3863 * this isn't what you want, so call ieee80211_remove_key() first for 3864 * the key that's being replaced. 3865 */ 3866 struct ieee80211_key_conf * 3867 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 3868 struct ieee80211_key_conf *keyconf); 3869 3870 /** 3871 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3872 * @vif: virtual interface the rekeying was done on 3873 * @bssid: The BSSID of the AP, for checking association 3874 * @replay_ctr: the new replay counter after GTK rekeying 3875 * @gfp: allocation flags 3876 */ 3877 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3878 const u8 *replay_ctr, gfp_t gfp); 3879 3880 /** 3881 * ieee80211_wake_queue - wake specific queue 3882 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3883 * @queue: queue number (counted from zero). 3884 * 3885 * Drivers should use this function instead of netif_wake_queue. 3886 */ 3887 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3888 3889 /** 3890 * ieee80211_stop_queue - stop specific queue 3891 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3892 * @queue: queue number (counted from zero). 3893 * 3894 * Drivers should use this function instead of netif_stop_queue. 3895 */ 3896 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3897 3898 /** 3899 * ieee80211_queue_stopped - test status of the queue 3900 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3901 * @queue: queue number (counted from zero). 3902 * 3903 * Drivers should use this function instead of netif_stop_queue. 3904 * 3905 * Return: %true if the queue is stopped. %false otherwise. 3906 */ 3907 3908 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3909 3910 /** 3911 * ieee80211_stop_queues - stop all queues 3912 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3913 * 3914 * Drivers should use this function instead of netif_stop_queue. 3915 */ 3916 void ieee80211_stop_queues(struct ieee80211_hw *hw); 3917 3918 /** 3919 * ieee80211_wake_queues - wake all queues 3920 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3921 * 3922 * Drivers should use this function instead of netif_wake_queue. 3923 */ 3924 void ieee80211_wake_queues(struct ieee80211_hw *hw); 3925 3926 /** 3927 * ieee80211_scan_completed - completed hardware scan 3928 * 3929 * When hardware scan offload is used (i.e. the hw_scan() callback is 3930 * assigned) this function needs to be called by the driver to notify 3931 * mac80211 that the scan finished. This function can be called from 3932 * any context, including hardirq context. 3933 * 3934 * @hw: the hardware that finished the scan 3935 * @aborted: set to true if scan was aborted 3936 */ 3937 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3938 3939 /** 3940 * ieee80211_sched_scan_results - got results from scheduled scan 3941 * 3942 * When a scheduled scan is running, this function needs to be called by the 3943 * driver whenever there are new scan results available. 3944 * 3945 * @hw: the hardware that is performing scheduled scans 3946 */ 3947 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3948 3949 /** 3950 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3951 * 3952 * When a scheduled scan is running, this function can be called by 3953 * the driver if it needs to stop the scan to perform another task. 3954 * Usual scenarios are drivers that cannot continue the scheduled scan 3955 * while associating, for instance. 3956 * 3957 * @hw: the hardware that is performing scheduled scans 3958 */ 3959 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3960 3961 /** 3962 * enum ieee80211_interface_iteration_flags - interface iteration flags 3963 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3964 * been added to the driver; However, note that during hardware 3965 * reconfiguration (after restart_hw) it will iterate over a new 3966 * interface and over all the existing interfaces even if they 3967 * haven't been re-added to the driver yet. 3968 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3969 * interfaces, even if they haven't been re-added to the driver yet. 3970 */ 3971 enum ieee80211_interface_iteration_flags { 3972 IEEE80211_IFACE_ITER_NORMAL = 0, 3973 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3974 }; 3975 3976 /** 3977 * ieee80211_iterate_active_interfaces - iterate active interfaces 3978 * 3979 * This function iterates over the interfaces associated with a given 3980 * hardware that are currently active and calls the callback for them. 3981 * This function allows the iterator function to sleep, when the iterator 3982 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3983 * be used. 3984 * Does not iterate over a new interface during add_interface(). 3985 * 3986 * @hw: the hardware struct of which the interfaces should be iterated over 3987 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3988 * @iterator: the iterator function to call 3989 * @data: first argument of the iterator function 3990 */ 3991 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3992 u32 iter_flags, 3993 void (*iterator)(void *data, u8 *mac, 3994 struct ieee80211_vif *vif), 3995 void *data); 3996 3997 /** 3998 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3999 * 4000 * This function iterates over the interfaces associated with a given 4001 * hardware that are currently active and calls the callback for them. 4002 * This function requires the iterator callback function to be atomic, 4003 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4004 * Does not iterate over a new interface during add_interface(). 4005 * 4006 * @hw: the hardware struct of which the interfaces should be iterated over 4007 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4008 * @iterator: the iterator function to call, cannot sleep 4009 * @data: first argument of the iterator function 4010 */ 4011 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4012 u32 iter_flags, 4013 void (*iterator)(void *data, 4014 u8 *mac, 4015 struct ieee80211_vif *vif), 4016 void *data); 4017 4018 /** 4019 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4020 * 4021 * This function iterates over the interfaces associated with a given 4022 * hardware that are currently active and calls the callback for them. 4023 * This version can only be used while holding the RTNL. 4024 * 4025 * @hw: the hardware struct of which the interfaces should be iterated over 4026 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4027 * @iterator: the iterator function to call, cannot sleep 4028 * @data: first argument of the iterator function 4029 */ 4030 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4031 u32 iter_flags, 4032 void (*iterator)(void *data, 4033 u8 *mac, 4034 struct ieee80211_vif *vif), 4035 void *data); 4036 4037 /** 4038 * ieee80211_queue_work - add work onto the mac80211 workqueue 4039 * 4040 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4041 * This helper ensures drivers are not queueing work when they should not be. 4042 * 4043 * @hw: the hardware struct for the interface we are adding work for 4044 * @work: the work we want to add onto the mac80211 workqueue 4045 */ 4046 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4047 4048 /** 4049 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4050 * 4051 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4052 * workqueue. 4053 * 4054 * @hw: the hardware struct for the interface we are adding work for 4055 * @dwork: delayable work to queue onto the mac80211 workqueue 4056 * @delay: number of jiffies to wait before queueing 4057 */ 4058 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4059 struct delayed_work *dwork, 4060 unsigned long delay); 4061 4062 /** 4063 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4064 * @sta: the station for which to start a BA session 4065 * @tid: the TID to BA on. 4066 * @timeout: session timeout value (in TUs) 4067 * 4068 * Return: success if addBA request was sent, failure otherwise 4069 * 4070 * Although mac80211/low level driver/user space application can estimate 4071 * the need to start aggregation on a certain RA/TID, the session level 4072 * will be managed by the mac80211. 4073 */ 4074 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4075 u16 timeout); 4076 4077 /** 4078 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4079 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4080 * @ra: receiver address of the BA session recipient. 4081 * @tid: the TID to BA on. 4082 * 4083 * This function must be called by low level driver once it has 4084 * finished with preparations for the BA session. It can be called 4085 * from any context. 4086 */ 4087 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4088 u16 tid); 4089 4090 /** 4091 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4092 * @sta: the station whose BA session to stop 4093 * @tid: the TID to stop BA. 4094 * 4095 * Return: negative error if the TID is invalid, or no aggregation active 4096 * 4097 * Although mac80211/low level driver/user space application can estimate 4098 * the need to stop aggregation on a certain RA/TID, the session level 4099 * will be managed by the mac80211. 4100 */ 4101 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4102 4103 /** 4104 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4105 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4106 * @ra: receiver address of the BA session recipient. 4107 * @tid: the desired TID to BA on. 4108 * 4109 * This function must be called by low level driver once it has 4110 * finished with preparations for the BA session tear down. It 4111 * can be called from any context. 4112 */ 4113 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4114 u16 tid); 4115 4116 /** 4117 * ieee80211_find_sta - find a station 4118 * 4119 * @vif: virtual interface to look for station on 4120 * @addr: station's address 4121 * 4122 * Return: The station, if found. %NULL otherwise. 4123 * 4124 * Note: This function must be called under RCU lock and the 4125 * resulting pointer is only valid under RCU lock as well. 4126 */ 4127 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4128 const u8 *addr); 4129 4130 /** 4131 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4132 * 4133 * @hw: pointer as obtained from ieee80211_alloc_hw() 4134 * @addr: remote station's address 4135 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4136 * 4137 * Return: The station, if found. %NULL otherwise. 4138 * 4139 * Note: This function must be called under RCU lock and the 4140 * resulting pointer is only valid under RCU lock as well. 4141 * 4142 * NOTE: You may pass NULL for localaddr, but then you will just get 4143 * the first STA that matches the remote address 'addr'. 4144 * We can have multiple STA associated with multiple 4145 * logical stations (e.g. consider a station connecting to another 4146 * BSSID on the same AP hardware without disconnecting first). 4147 * In this case, the result of this method with localaddr NULL 4148 * is not reliable. 4149 * 4150 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4151 */ 4152 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4153 const u8 *addr, 4154 const u8 *localaddr); 4155 4156 /** 4157 * ieee80211_sta_block_awake - block station from waking up 4158 * @hw: the hardware 4159 * @pubsta: the station 4160 * @block: whether to block or unblock 4161 * 4162 * Some devices require that all frames that are on the queues 4163 * for a specific station that went to sleep are flushed before 4164 * a poll response or frames after the station woke up can be 4165 * delivered to that it. Note that such frames must be rejected 4166 * by the driver as filtered, with the appropriate status flag. 4167 * 4168 * This function allows implementing this mode in a race-free 4169 * manner. 4170 * 4171 * To do this, a driver must keep track of the number of frames 4172 * still enqueued for a specific station. If this number is not 4173 * zero when the station goes to sleep, the driver must call 4174 * this function to force mac80211 to consider the station to 4175 * be asleep regardless of the station's actual state. Once the 4176 * number of outstanding frames reaches zero, the driver must 4177 * call this function again to unblock the station. That will 4178 * cause mac80211 to be able to send ps-poll responses, and if 4179 * the station queried in the meantime then frames will also 4180 * be sent out as a result of this. Additionally, the driver 4181 * will be notified that the station woke up some time after 4182 * it is unblocked, regardless of whether the station actually 4183 * woke up while blocked or not. 4184 */ 4185 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4186 struct ieee80211_sta *pubsta, bool block); 4187 4188 /** 4189 * ieee80211_sta_eosp - notify mac80211 about end of SP 4190 * @pubsta: the station 4191 * 4192 * When a device transmits frames in a way that it can't tell 4193 * mac80211 in the TX status about the EOSP, it must clear the 4194 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 4195 * This applies for PS-Poll as well as uAPSD. 4196 * 4197 * Note that just like with _tx_status() and _rx() drivers must 4198 * not mix calls to irqsafe/non-irqsafe versions, this function 4199 * must not be mixed with those either. Use the all irqsafe, or 4200 * all non-irqsafe, don't mix! 4201 * 4202 * NB: the _irqsafe version of this function doesn't exist, no 4203 * driver needs it right now. Don't call this function if 4204 * you'd need the _irqsafe version, look at the git history 4205 * and restore the _irqsafe version! 4206 */ 4207 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 4208 4209 /** 4210 * ieee80211_iter_keys - iterate keys programmed into the device 4211 * @hw: pointer obtained from ieee80211_alloc_hw() 4212 * @vif: virtual interface to iterate, may be %NULL for all 4213 * @iter: iterator function that will be called for each key 4214 * @iter_data: custom data to pass to the iterator function 4215 * 4216 * This function can be used to iterate all the keys known to 4217 * mac80211, even those that weren't previously programmed into 4218 * the device. This is intended for use in WoWLAN if the device 4219 * needs reprogramming of the keys during suspend. Note that due 4220 * to locking reasons, it is also only safe to call this at few 4221 * spots since it must hold the RTNL and be able to sleep. 4222 * 4223 * The order in which the keys are iterated matches the order 4224 * in which they were originally installed and handed to the 4225 * set_key callback. 4226 */ 4227 void ieee80211_iter_keys(struct ieee80211_hw *hw, 4228 struct ieee80211_vif *vif, 4229 void (*iter)(struct ieee80211_hw *hw, 4230 struct ieee80211_vif *vif, 4231 struct ieee80211_sta *sta, 4232 struct ieee80211_key_conf *key, 4233 void *data), 4234 void *iter_data); 4235 4236 /** 4237 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 4238 * @hw: pointre obtained from ieee80211_alloc_hw(). 4239 * @iter: iterator function 4240 * @iter_data: data passed to iterator function 4241 * 4242 * Iterate all active channel contexts. This function is atomic and 4243 * doesn't acquire any locks internally that might be held in other 4244 * places while calling into the driver. 4245 * 4246 * The iterator will not find a context that's being added (during 4247 * the driver callback to add it) but will find it while it's being 4248 * removed. 4249 * 4250 * Note that during hardware restart, all contexts that existed 4251 * before the restart are considered already present so will be 4252 * found while iterating, whether they've been re-added already 4253 * or not. 4254 */ 4255 void ieee80211_iter_chan_contexts_atomic( 4256 struct ieee80211_hw *hw, 4257 void (*iter)(struct ieee80211_hw *hw, 4258 struct ieee80211_chanctx_conf *chanctx_conf, 4259 void *data), 4260 void *iter_data); 4261 4262 /** 4263 * ieee80211_ap_probereq_get - retrieve a Probe Request template 4264 * @hw: pointer obtained from ieee80211_alloc_hw(). 4265 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4266 * 4267 * Creates a Probe Request template which can, for example, be uploaded to 4268 * hardware. The template is filled with bssid, ssid and supported rate 4269 * information. This function must only be called from within the 4270 * .bss_info_changed callback function and only in managed mode. The function 4271 * is only useful when the interface is associated, otherwise it will return 4272 * %NULL. 4273 * 4274 * Return: The Probe Request template. %NULL on error. 4275 */ 4276 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4277 struct ieee80211_vif *vif); 4278 4279 /** 4280 * ieee80211_beacon_loss - inform hardware does not receive beacons 4281 * 4282 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4283 * 4284 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 4285 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 4286 * hardware is not receiving beacons with this function. 4287 */ 4288 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 4289 4290 /** 4291 * ieee80211_connection_loss - inform hardware has lost connection to the AP 4292 * 4293 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4294 * 4295 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 4296 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 4297 * needs to inform if the connection to the AP has been lost. 4298 * The function may also be called if the connection needs to be terminated 4299 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 4300 * 4301 * This function will cause immediate change to disassociated state, 4302 * without connection recovery attempts. 4303 */ 4304 void ieee80211_connection_loss(struct ieee80211_vif *vif); 4305 4306 /** 4307 * ieee80211_resume_disconnect - disconnect from AP after resume 4308 * 4309 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4310 * 4311 * Instructs mac80211 to disconnect from the AP after resume. 4312 * Drivers can use this after WoWLAN if they know that the 4313 * connection cannot be kept up, for example because keys were 4314 * used while the device was asleep but the replay counters or 4315 * similar cannot be retrieved from the device during resume. 4316 * 4317 * Note that due to implementation issues, if the driver uses 4318 * the reconfiguration functionality during resume the interface 4319 * will still be added as associated first during resume and then 4320 * disconnect normally later. 4321 * 4322 * This function can only be called from the resume callback and 4323 * the driver must not be holding any of its own locks while it 4324 * calls this function, or at least not any locks it needs in the 4325 * key configuration paths (if it supports HW crypto). 4326 */ 4327 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 4328 4329 /** 4330 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 4331 * rssi threshold triggered 4332 * 4333 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4334 * @rssi_event: the RSSI trigger event type 4335 * @gfp: context flags 4336 * 4337 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 4338 * monitoring is configured with an rssi threshold, the driver will inform 4339 * whenever the rssi level reaches the threshold. 4340 */ 4341 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 4342 enum nl80211_cqm_rssi_threshold_event rssi_event, 4343 gfp_t gfp); 4344 4345 /** 4346 * ieee80211_radar_detected - inform that a radar was detected 4347 * 4348 * @hw: pointer as obtained from ieee80211_alloc_hw() 4349 */ 4350 void ieee80211_radar_detected(struct ieee80211_hw *hw); 4351 4352 /** 4353 * ieee80211_chswitch_done - Complete channel switch process 4354 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4355 * @success: make the channel switch successful or not 4356 * 4357 * Complete the channel switch post-process: set the new operational channel 4358 * and wake up the suspended queues. 4359 */ 4360 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 4361 4362 /** 4363 * ieee80211_request_smps - request SM PS transition 4364 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4365 * @smps_mode: new SM PS mode 4366 * 4367 * This allows the driver to request an SM PS transition in managed 4368 * mode. This is useful when the driver has more information than 4369 * the stack about possible interference, for example by bluetooth. 4370 */ 4371 void ieee80211_request_smps(struct ieee80211_vif *vif, 4372 enum ieee80211_smps_mode smps_mode); 4373 4374 /** 4375 * ieee80211_ready_on_channel - notification of remain-on-channel start 4376 * @hw: pointer as obtained from ieee80211_alloc_hw() 4377 */ 4378 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4379 4380 /** 4381 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4382 * @hw: pointer as obtained from ieee80211_alloc_hw() 4383 */ 4384 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4385 4386 /** 4387 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4388 * 4389 * in order not to harm the system performance and user experience, the device 4390 * may request not to allow any rx ba session and tear down existing rx ba 4391 * sessions based on system constraints such as periodic BT activity that needs 4392 * to limit wlan activity (eg.sco or a2dp)." 4393 * in such cases, the intention is to limit the duration of the rx ppdu and 4394 * therefore prevent the peer device to use a-mpdu aggregation. 4395 * 4396 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4397 * @ba_rx_bitmap: Bit map of open rx ba per tid 4398 * @addr: & to bssid mac address 4399 */ 4400 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4401 const u8 *addr); 4402 4403 /** 4404 * ieee80211_send_bar - send a BlockAckReq frame 4405 * 4406 * can be used to flush pending frames from the peer's aggregation reorder 4407 * buffer. 4408 * 4409 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4410 * @ra: the peer's destination address 4411 * @tid: the TID of the aggregation session 4412 * @ssn: the new starting sequence number for the receiver 4413 */ 4414 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4415 4416 /* Rate control API */ 4417 4418 /** 4419 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4420 * 4421 * @hw: The hardware the algorithm is invoked for. 4422 * @sband: The band this frame is being transmitted on. 4423 * @bss_conf: the current BSS configuration 4424 * @skb: the skb that will be transmitted, the control information in it needs 4425 * to be filled in 4426 * @reported_rate: The rate control algorithm can fill this in to indicate 4427 * which rate should be reported to userspace as the current rate and 4428 * used for rate calculations in the mesh network. 4429 * @rts: whether RTS will be used for this frame because it is longer than the 4430 * RTS threshold 4431 * @short_preamble: whether mac80211 will request short-preamble transmission 4432 * if the selected rate supports it 4433 * @max_rate_idx: user-requested maximum (legacy) rate 4434 * (deprecated; this will be removed once drivers get updated to use 4435 * rate_idx_mask) 4436 * @rate_idx_mask: user-requested (legacy) rate mask 4437 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 4438 * @bss: whether this frame is sent out in AP or IBSS mode 4439 */ 4440 struct ieee80211_tx_rate_control { 4441 struct ieee80211_hw *hw; 4442 struct ieee80211_supported_band *sband; 4443 struct ieee80211_bss_conf *bss_conf; 4444 struct sk_buff *skb; 4445 struct ieee80211_tx_rate reported_rate; 4446 bool rts, short_preamble; 4447 u8 max_rate_idx; 4448 u32 rate_idx_mask; 4449 u8 *rate_idx_mcs_mask; 4450 bool bss; 4451 }; 4452 4453 struct rate_control_ops { 4454 struct module *module; 4455 const char *name; 4456 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4457 void (*free)(void *priv); 4458 4459 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4460 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4461 struct cfg80211_chan_def *chandef, 4462 struct ieee80211_sta *sta, void *priv_sta); 4463 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4464 struct cfg80211_chan_def *chandef, 4465 struct ieee80211_sta *sta, void *priv_sta, 4466 u32 changed); 4467 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4468 void *priv_sta); 4469 4470 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4471 struct ieee80211_sta *sta, void *priv_sta, 4472 struct sk_buff *skb); 4473 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4474 struct ieee80211_tx_rate_control *txrc); 4475 4476 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4477 struct dentry *dir); 4478 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4479 }; 4480 4481 static inline int rate_supported(struct ieee80211_sta *sta, 4482 enum ieee80211_band band, 4483 int index) 4484 { 4485 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4486 } 4487 4488 /** 4489 * rate_control_send_low - helper for drivers for management/no-ack frames 4490 * 4491 * Rate control algorithms that agree to use the lowest rate to 4492 * send management frames and NO_ACK data with the respective hw 4493 * retries should use this in the beginning of their mac80211 get_rate 4494 * callback. If true is returned the rate control can simply return. 4495 * If false is returned we guarantee that sta and sta and priv_sta is 4496 * not null. 4497 * 4498 * Rate control algorithms wishing to do more intelligent selection of 4499 * rate for multicast/broadcast frames may choose to not use this. 4500 * 4501 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4502 * that this may be null. 4503 * @priv_sta: private rate control structure. This may be null. 4504 * @txrc: rate control information we sholud populate for mac80211. 4505 */ 4506 bool rate_control_send_low(struct ieee80211_sta *sta, 4507 void *priv_sta, 4508 struct ieee80211_tx_rate_control *txrc); 4509 4510 4511 static inline s8 4512 rate_lowest_index(struct ieee80211_supported_band *sband, 4513 struct ieee80211_sta *sta) 4514 { 4515 int i; 4516 4517 for (i = 0; i < sband->n_bitrates; i++) 4518 if (rate_supported(sta, sband->band, i)) 4519 return i; 4520 4521 /* warn when we cannot find a rate. */ 4522 WARN_ON_ONCE(1); 4523 4524 /* and return 0 (the lowest index) */ 4525 return 0; 4526 } 4527 4528 static inline 4529 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4530 struct ieee80211_sta *sta) 4531 { 4532 unsigned int i; 4533 4534 for (i = 0; i < sband->n_bitrates; i++) 4535 if (rate_supported(sta, sband->band, i)) 4536 return true; 4537 return false; 4538 } 4539 4540 /** 4541 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 4542 * 4543 * When not doing a rate control probe to test rates, rate control should pass 4544 * its rate selection to mac80211. If the driver supports receiving a station 4545 * rate table, it will use it to ensure that frames are always sent based on 4546 * the most recent rate control module decision. 4547 * 4548 * @hw: pointer as obtained from ieee80211_alloc_hw() 4549 * @pubsta: &struct ieee80211_sta pointer to the target destination. 4550 * @rates: new tx rate set to be used for this station. 4551 */ 4552 int rate_control_set_rates(struct ieee80211_hw *hw, 4553 struct ieee80211_sta *pubsta, 4554 struct ieee80211_sta_rates *rates); 4555 4556 int ieee80211_rate_control_register(struct rate_control_ops *ops); 4557 void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4558 4559 static inline bool 4560 conf_is_ht20(struct ieee80211_conf *conf) 4561 { 4562 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 4563 } 4564 4565 static inline bool 4566 conf_is_ht40_minus(struct ieee80211_conf *conf) 4567 { 4568 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4569 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 4570 } 4571 4572 static inline bool 4573 conf_is_ht40_plus(struct ieee80211_conf *conf) 4574 { 4575 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 4576 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 4577 } 4578 4579 static inline bool 4580 conf_is_ht40(struct ieee80211_conf *conf) 4581 { 4582 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 4583 } 4584 4585 static inline bool 4586 conf_is_ht(struct ieee80211_conf *conf) 4587 { 4588 return conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT; 4589 } 4590 4591 static inline enum nl80211_iftype 4592 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4593 { 4594 if (p2p) { 4595 switch (type) { 4596 case NL80211_IFTYPE_STATION: 4597 return NL80211_IFTYPE_P2P_CLIENT; 4598 case NL80211_IFTYPE_AP: 4599 return NL80211_IFTYPE_P2P_GO; 4600 default: 4601 break; 4602 } 4603 } 4604 return type; 4605 } 4606 4607 static inline enum nl80211_iftype 4608 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4609 { 4610 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4611 } 4612 4613 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4614 int rssi_min_thold, 4615 int rssi_max_thold); 4616 4617 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4618 4619 /** 4620 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4621 * 4622 * @vif: the specified virtual interface 4623 * 4624 * Note: This function assumes that the given vif is valid. 4625 * 4626 * Return: The average RSSI value for the requested interface, or 0 if not 4627 * applicable. 4628 */ 4629 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4630 4631 /** 4632 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4633 * @vif: virtual interface 4634 * @wakeup: wakeup reason(s) 4635 * @gfp: allocation flags 4636 * 4637 * See cfg80211_report_wowlan_wakeup(). 4638 */ 4639 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4640 struct cfg80211_wowlan_wakeup *wakeup, 4641 gfp_t gfp); 4642 4643 /** 4644 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 4645 * @hw: pointer as obtained from ieee80211_alloc_hw() 4646 * @vif: virtual interface 4647 * @skb: frame to be sent from within the driver 4648 * @band: the band to transmit on 4649 * @sta: optional pointer to get the station to send the frame to 4650 * 4651 * Note: must be called under RCU lock 4652 */ 4653 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 4654 struct ieee80211_vif *vif, struct sk_buff *skb, 4655 int band, struct ieee80211_sta **sta); 4656 4657 /** 4658 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 4659 * 4660 * @next_tsf: TSF timestamp of the next absent state change 4661 * @has_next_tsf: next absent state change event pending 4662 * 4663 * @absent: descriptor bitmask, set if GO is currently absent 4664 * 4665 * private: 4666 * 4667 * @count: count fields from the NoA descriptors 4668 * @desc: adjusted data from the NoA 4669 */ 4670 struct ieee80211_noa_data { 4671 u32 next_tsf; 4672 bool has_next_tsf; 4673 4674 u8 absent; 4675 4676 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 4677 struct { 4678 u32 start; 4679 u32 duration; 4680 u32 interval; 4681 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 4682 }; 4683 4684 /** 4685 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 4686 * 4687 * @attr: P2P NoA IE 4688 * @data: NoA tracking data 4689 * @tsf: current TSF timestamp 4690 * 4691 * Return: number of successfully parsed descriptors 4692 */ 4693 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4694 struct ieee80211_noa_data *data, u32 tsf); 4695 4696 /** 4697 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 4698 * 4699 * @data: NoA tracking data 4700 * @tsf: current TSF timestamp 4701 */ 4702 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 4703 4704 #endif /* MAC80211_H */ 4705