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 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright (C) 2015 Intel Deutschland GmbH 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #ifndef MAC80211_H 16 #define MAC80211_H 17 18 #include <linux/bug.h> 19 #include <linux/kernel.h> 20 #include <linux/if_ether.h> 21 #include <linux/skbuff.h> 22 #include <linux/ieee80211.h> 23 #include <net/cfg80211.h> 24 #include <asm/unaligned.h> 25 26 /** 27 * DOC: Introduction 28 * 29 * mac80211 is the Linux stack for 802.11 hardware that implements 30 * only partial functionality in hard- or firmware. This document 31 * defines the interface between mac80211 and low-level hardware 32 * drivers. 33 */ 34 35 /** 36 * DOC: Calling mac80211 from interrupts 37 * 38 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 39 * called in hardware interrupt context. The low-level driver must not call any 40 * other functions in hardware interrupt context. If there is a need for such 41 * call, the low-level driver should first ACK the interrupt and perform the 42 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 43 * tasklet function. 44 * 45 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 46 * use the non-IRQ-safe functions! 47 */ 48 49 /** 50 * DOC: Warning 51 * 52 * If you're reading this document and not the header file itself, it will 53 * be incomplete because not all documentation has been converted yet. 54 */ 55 56 /** 57 * DOC: Frame format 58 * 59 * As a general rule, when frames are passed between mac80211 and the driver, 60 * they start with the IEEE 802.11 header and include the same octets that are 61 * sent over the air except for the FCS which should be calculated by the 62 * hardware. 63 * 64 * There are, however, various exceptions to this rule for advanced features: 65 * 66 * The first exception is for hardware encryption and decryption offload 67 * where the IV/ICV may or may not be generated in hardware. 68 * 69 * Secondly, when the hardware handles fragmentation, the frame handed to 70 * the driver from mac80211 is the MSDU, not the MPDU. 71 */ 72 73 /** 74 * DOC: mac80211 workqueue 75 * 76 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 77 * The workqueue is a single threaded workqueue and can only be accessed by 78 * helpers for sanity checking. Drivers must ensure all work added onto the 79 * mac80211 workqueue should be cancelled on the driver stop() callback. 80 * 81 * mac80211 will flushed the workqueue upon interface removal and during 82 * suspend. 83 * 84 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 85 * 86 */ 87 88 /** 89 * DOC: mac80211 software tx queueing 90 * 91 * mac80211 provides an optional intermediate queueing implementation designed 92 * to allow the driver to keep hardware queues short and provide some fairness 93 * between different stations/interfaces. 94 * In this model, the driver pulls data frames from the mac80211 queue instead 95 * of letting mac80211 push them via drv_tx(). 96 * Other frames (e.g. control or management) are still pushed using drv_tx(). 97 * 98 * Drivers indicate that they use this model by implementing the .wake_tx_queue 99 * driver operation. 100 * 101 * Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with a 102 * single per-vif queue for multicast data frames. 103 * 104 * The driver is expected to initialize its private per-queue data for stations 105 * and interfaces in the .add_interface and .sta_add ops. 106 * 107 * The driver can't access the queue directly. To dequeue a frame, it calls 108 * ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it 109 * calls the .wake_tx_queue driver op. 110 * 111 * For AP powersave TIM handling, the driver only needs to indicate if it has 112 * buffered packets in the driver specific data structures by calling 113 * ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq 114 * struct, mac80211 sets the appropriate TIM PVB bits and calls 115 * .release_buffered_frames(). 116 * In that callback the driver is therefore expected to release its own 117 * buffered frames and afterwards also frames from the ieee80211_txq (obtained 118 * via the usual ieee80211_tx_dequeue). 119 */ 120 121 struct device; 122 123 /** 124 * enum ieee80211_max_queues - maximum number of queues 125 * 126 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 127 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 128 */ 129 enum ieee80211_max_queues { 130 IEEE80211_MAX_QUEUES = 16, 131 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 132 }; 133 134 #define IEEE80211_INVAL_HW_QUEUE 0xff 135 136 /** 137 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 138 * @IEEE80211_AC_VO: voice 139 * @IEEE80211_AC_VI: video 140 * @IEEE80211_AC_BE: best effort 141 * @IEEE80211_AC_BK: background 142 */ 143 enum ieee80211_ac_numbers { 144 IEEE80211_AC_VO = 0, 145 IEEE80211_AC_VI = 1, 146 IEEE80211_AC_BE = 2, 147 IEEE80211_AC_BK = 3, 148 }; 149 #define IEEE80211_NUM_ACS 4 150 151 /** 152 * struct ieee80211_tx_queue_params - transmit queue configuration 153 * 154 * The information provided in this structure is required for QoS 155 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 156 * 157 * @aifs: arbitration interframe space [0..255] 158 * @cw_min: minimum contention window [a value of the form 159 * 2^n-1 in the range 1..32767] 160 * @cw_max: maximum contention window [like @cw_min] 161 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 162 * @acm: is mandatory admission control required for the access category 163 * @uapsd: is U-APSD mode enabled for the queue 164 */ 165 struct ieee80211_tx_queue_params { 166 u16 txop; 167 u16 cw_min; 168 u16 cw_max; 169 u8 aifs; 170 bool acm; 171 bool uapsd; 172 }; 173 174 struct ieee80211_low_level_stats { 175 unsigned int dot11ACKFailureCount; 176 unsigned int dot11RTSFailureCount; 177 unsigned int dot11FCSErrorCount; 178 unsigned int dot11RTSSuccessCount; 179 }; 180 181 /** 182 * enum ieee80211_chanctx_change - change flag for channel context 183 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 184 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 185 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 186 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 187 * this is used only with channel switching with CSA 188 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 189 */ 190 enum ieee80211_chanctx_change { 191 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 192 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 193 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 194 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 195 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 196 }; 197 198 /** 199 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 200 * 201 * This is the driver-visible part. The ieee80211_chanctx 202 * that contains it is visible in mac80211 only. 203 * 204 * @def: the channel definition 205 * @min_def: the minimum channel definition currently required. 206 * @rx_chains_static: The number of RX chains that must always be 207 * active on the channel to receive MIMO transmissions 208 * @rx_chains_dynamic: The number of RX chains that must be enabled 209 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 210 * this will always be >= @rx_chains_static. 211 * @radar_enabled: whether radar detection is enabled on this channel. 212 * @drv_priv: data area for driver use, will always be aligned to 213 * sizeof(void *), size is determined in hw information. 214 */ 215 struct ieee80211_chanctx_conf { 216 struct cfg80211_chan_def def; 217 struct cfg80211_chan_def min_def; 218 219 u8 rx_chains_static, rx_chains_dynamic; 220 221 bool radar_enabled; 222 223 u8 drv_priv[0] __aligned(sizeof(void *)); 224 }; 225 226 /** 227 * enum ieee80211_chanctx_switch_mode - channel context switch mode 228 * @CHANCTX_SWMODE_REASSIGN_VIF: Both old and new contexts already 229 * exist (and will continue to exist), but the virtual interface 230 * needs to be switched from one to the other. 231 * @CHANCTX_SWMODE_SWAP_CONTEXTS: The old context exists but will stop 232 * to exist with this call, the new context doesn't exist but 233 * will be active after this call, the virtual interface switches 234 * from the old to the new (note that the driver may of course 235 * implement this as an on-the-fly chandef switch of the existing 236 * hardware context, but the mac80211 pointer for the old context 237 * will cease to exist and only the new one will later be used 238 * for changes/removal.) 239 */ 240 enum ieee80211_chanctx_switch_mode { 241 CHANCTX_SWMODE_REASSIGN_VIF, 242 CHANCTX_SWMODE_SWAP_CONTEXTS, 243 }; 244 245 /** 246 * struct ieee80211_vif_chanctx_switch - vif chanctx switch information 247 * 248 * This is structure is used to pass information about a vif that 249 * needs to switch from one chanctx to another. The 250 * &ieee80211_chanctx_switch_mode defines how the switch should be 251 * done. 252 * 253 * @vif: the vif that should be switched from old_ctx to new_ctx 254 * @old_ctx: the old context to which the vif was assigned 255 * @new_ctx: the new context to which the vif must be assigned 256 */ 257 struct ieee80211_vif_chanctx_switch { 258 struct ieee80211_vif *vif; 259 struct ieee80211_chanctx_conf *old_ctx; 260 struct ieee80211_chanctx_conf *new_ctx; 261 }; 262 263 /** 264 * enum ieee80211_bss_change - BSS change notification flags 265 * 266 * These flags are used with the bss_info_changed() callback 267 * to indicate which BSS parameter changed. 268 * 269 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 270 * also implies a change in the AID. 271 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 272 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 273 * @BSS_CHANGED_ERP_SLOT: slot timing changed 274 * @BSS_CHANGED_HT: 802.11n parameters changed 275 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 276 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 277 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 278 * reason (IBSS and managed mode) 279 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 280 * new beacon (beaconing modes) 281 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 282 * enabled/disabled (beaconing modes) 283 * @BSS_CHANGED_CQM: Connection quality monitor config changed 284 * @BSS_CHANGED_IBSS: IBSS join status changed 285 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 286 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 287 * that it is only ever disabled for station mode. 288 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 289 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 290 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 291 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 292 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 293 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 294 * changed (currently only in P2P client mode, GO mode will be later) 295 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 296 * currently dtim_period only is under consideration. 297 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 298 * note that this is only called when it changes after the channel 299 * context had been assigned. 300 * @BSS_CHANGED_OCB: OCB join status changed 301 */ 302 enum ieee80211_bss_change { 303 BSS_CHANGED_ASSOC = 1<<0, 304 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 305 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 306 BSS_CHANGED_ERP_SLOT = 1<<3, 307 BSS_CHANGED_HT = 1<<4, 308 BSS_CHANGED_BASIC_RATES = 1<<5, 309 BSS_CHANGED_BEACON_INT = 1<<6, 310 BSS_CHANGED_BSSID = 1<<7, 311 BSS_CHANGED_BEACON = 1<<8, 312 BSS_CHANGED_BEACON_ENABLED = 1<<9, 313 BSS_CHANGED_CQM = 1<<10, 314 BSS_CHANGED_IBSS = 1<<11, 315 BSS_CHANGED_ARP_FILTER = 1<<12, 316 BSS_CHANGED_QOS = 1<<13, 317 BSS_CHANGED_IDLE = 1<<14, 318 BSS_CHANGED_SSID = 1<<15, 319 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 320 BSS_CHANGED_PS = 1<<17, 321 BSS_CHANGED_TXPOWER = 1<<18, 322 BSS_CHANGED_P2P_PS = 1<<19, 323 BSS_CHANGED_BEACON_INFO = 1<<20, 324 BSS_CHANGED_BANDWIDTH = 1<<21, 325 BSS_CHANGED_OCB = 1<<22, 326 327 /* when adding here, make sure to change ieee80211_reconfig */ 328 }; 329 330 /* 331 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 332 * of addresses for an interface increase beyond this value, hardware ARP 333 * filtering will be disabled. 334 */ 335 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 336 337 /** 338 * enum ieee80211_event_type - event to be notified to the low level driver 339 * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver. 340 * @MLME_EVENT: event related to MLME 341 * @BAR_RX_EVENT: a BAR was received 342 * @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because 343 * they timed out. This won't be called for each frame released, but only 344 * once each time the timeout triggers. 345 */ 346 enum ieee80211_event_type { 347 RSSI_EVENT, 348 MLME_EVENT, 349 BAR_RX_EVENT, 350 BA_FRAME_TIMEOUT, 351 }; 352 353 /** 354 * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT 355 * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver. 356 * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver. 357 */ 358 enum ieee80211_rssi_event_data { 359 RSSI_EVENT_HIGH, 360 RSSI_EVENT_LOW, 361 }; 362 363 /** 364 * struct ieee80211_rssi_event - data attached to an %RSSI_EVENT 365 * @data: See &enum ieee80211_rssi_event_data 366 */ 367 struct ieee80211_rssi_event { 368 enum ieee80211_rssi_event_data data; 369 }; 370 371 /** 372 * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT 373 * @AUTH_EVENT: the MLME operation is authentication 374 * @ASSOC_EVENT: the MLME operation is association 375 * @DEAUTH_RX_EVENT: deauth received.. 376 * @DEAUTH_TX_EVENT: deauth sent. 377 */ 378 enum ieee80211_mlme_event_data { 379 AUTH_EVENT, 380 ASSOC_EVENT, 381 DEAUTH_RX_EVENT, 382 DEAUTH_TX_EVENT, 383 }; 384 385 /** 386 * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT 387 * @MLME_SUCCESS: the MLME operation completed successfully. 388 * @MLME_DENIED: the MLME operation was denied by the peer. 389 * @MLME_TIMEOUT: the MLME operation timed out. 390 */ 391 enum ieee80211_mlme_event_status { 392 MLME_SUCCESS, 393 MLME_DENIED, 394 MLME_TIMEOUT, 395 }; 396 397 /** 398 * struct ieee80211_mlme_event - data attached to an %MLME_EVENT 399 * @data: See &enum ieee80211_mlme_event_data 400 * @status: See &enum ieee80211_mlme_event_status 401 * @reason: the reason code if applicable 402 */ 403 struct ieee80211_mlme_event { 404 enum ieee80211_mlme_event_data data; 405 enum ieee80211_mlme_event_status status; 406 u16 reason; 407 }; 408 409 /** 410 * struct ieee80211_ba_event - data attached for BlockAck related events 411 * @sta: pointer to the &ieee80211_sta to which this event relates 412 * @tid: the tid 413 * @ssn: the starting sequence number (for %BAR_RX_EVENT) 414 */ 415 struct ieee80211_ba_event { 416 struct ieee80211_sta *sta; 417 u16 tid; 418 u16 ssn; 419 }; 420 421 /** 422 * struct ieee80211_event - event to be sent to the driver 423 * @type: The event itself. See &enum ieee80211_event_type. 424 * @rssi: relevant if &type is %RSSI_EVENT 425 * @mlme: relevant if &type is %AUTH_EVENT 426 * @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT 427 * @u:union holding the fields above 428 */ 429 struct ieee80211_event { 430 enum ieee80211_event_type type; 431 union { 432 struct ieee80211_rssi_event rssi; 433 struct ieee80211_mlme_event mlme; 434 struct ieee80211_ba_event ba; 435 } u; 436 }; 437 438 /** 439 * struct ieee80211_bss_conf - holds the BSS's changing parameters 440 * 441 * This structure keeps information about a BSS (and an association 442 * to that BSS) that can change during the lifetime of the BSS. 443 * 444 * @assoc: association status 445 * @ibss_joined: indicates whether this station is part of an IBSS 446 * or not 447 * @ibss_creator: indicates if a new IBSS network is being created 448 * @aid: association ID number, valid only when @assoc is true 449 * @use_cts_prot: use CTS protection 450 * @use_short_preamble: use 802.11b short preamble 451 * @use_short_slot: use short slot time (only relevant for ERP) 452 * @dtim_period: num of beacons before the next DTIM, for beaconing, 453 * valid in station mode only if after the driver was notified 454 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 455 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 456 * as it may have been received during scanning long ago). If the 457 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 458 * only come from a beacon, but might not become valid until after 459 * association when a beacon is received (which is notified with the 460 * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice. 461 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 462 * the driver/device can use this to calculate synchronisation 463 * (see @sync_tsf). See also sync_dtim_count important notice. 464 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 465 * is requested, see @sync_tsf/@sync_device_ts. 466 * IMPORTANT: These three sync_* parameters would possibly be out of sync 467 * by the time the driver will use them. The synchronized view is currently 468 * guaranteed only in certain callbacks. 469 * @beacon_int: beacon interval 470 * @assoc_capability: capabilities taken from assoc resp 471 * @basic_rates: bitmap of basic rates, each bit stands for an 472 * index into the rate table configured by the driver in 473 * the current band. 474 * @beacon_rate: associated AP's beacon TX rate 475 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 476 * @bssid: The BSSID for this BSS 477 * @enable_beacon: whether beaconing should be enabled or not 478 * @chandef: Channel definition for this BSS -- the hardware might be 479 * configured a higher bandwidth than this BSS uses, for example. 480 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 481 * This field is only valid when the channel is a wide HT/VHT channel. 482 * Note that with TDLS this can be the case (channel is HT, protection must 483 * be used from this field) even when the BSS association isn't using HT. 484 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 485 * implies disabled. As with the cfg80211 callback, a change here should 486 * cause an event to be sent indicating where the current value is in 487 * relation to the newly configured threshold. 488 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 489 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 490 * may filter ARP queries targeted for other addresses than listed here. 491 * The driver must allow ARP queries targeted for all address listed here 492 * to pass through. An empty list implies no ARP queries need to pass. 493 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 494 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 495 * array size), it's up to the driver what to do in that case. 496 * @qos: This is a QoS-enabled BSS. 497 * @idle: This interface is idle. There's also a global idle flag in the 498 * hardware config which may be more appropriate depending on what 499 * your driver/device needs to do. 500 * @ps: power-save mode (STA only). This flag is NOT affected by 501 * offchannel/dynamic_ps operations. 502 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 503 * @ssid_len: Length of SSID given in @ssid. 504 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 505 * @txpower: TX power in dBm 506 * @txpower_type: TX power adjustment used to control per packet Transmit 507 * Power Control (TPC) in lower driver for the current vif. In particular 508 * TPC is enabled if value passed in %txpower_type is 509 * NL80211_TX_POWER_LIMITED (allow using less than specified from 510 * userspace), whereas TPC is disabled if %txpower_type is set to 511 * NL80211_TX_POWER_FIXED (use value configured from userspace) 512 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 513 */ 514 struct ieee80211_bss_conf { 515 const u8 *bssid; 516 /* association related data */ 517 bool assoc, ibss_joined; 518 bool ibss_creator; 519 u16 aid; 520 /* erp related data */ 521 bool use_cts_prot; 522 bool use_short_preamble; 523 bool use_short_slot; 524 bool enable_beacon; 525 u8 dtim_period; 526 u16 beacon_int; 527 u16 assoc_capability; 528 u64 sync_tsf; 529 u32 sync_device_ts; 530 u8 sync_dtim_count; 531 u32 basic_rates; 532 struct ieee80211_rate *beacon_rate; 533 int mcast_rate[IEEE80211_NUM_BANDS]; 534 u16 ht_operation_mode; 535 s32 cqm_rssi_thold; 536 u32 cqm_rssi_hyst; 537 struct cfg80211_chan_def chandef; 538 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 539 int arp_addr_cnt; 540 bool qos; 541 bool idle; 542 bool ps; 543 u8 ssid[IEEE80211_MAX_SSID_LEN]; 544 size_t ssid_len; 545 bool hidden_ssid; 546 int txpower; 547 enum nl80211_tx_power_setting txpower_type; 548 struct ieee80211_p2p_noa_attr p2p_noa_attr; 549 }; 550 551 /** 552 * enum mac80211_tx_info_flags - flags to describe transmission information/status 553 * 554 * These flags are used with the @flags member of &ieee80211_tx_info. 555 * 556 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 557 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 558 * number to this frame, taking care of not overwriting the fragment 559 * number and increasing the sequence number only when the 560 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 561 * assign sequence numbers to QoS-data frames but cannot do so correctly 562 * for non-QoS-data and management frames because beacons need them from 563 * that counter as well and mac80211 cannot guarantee proper sequencing. 564 * If this flag is set, the driver should instruct the hardware to 565 * assign a sequence number to the frame or assign one itself. Cf. IEEE 566 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 567 * beacons and always be clear for frames without a sequence number field. 568 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 569 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 570 * station 571 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 572 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 573 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 574 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 575 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 576 * because the destination STA was in powersave mode. Note that to 577 * avoid race conditions, the filter must be set by the hardware or 578 * firmware upon receiving a frame that indicates that the station 579 * went to sleep (must be done on device to filter frames already on 580 * the queue) and may only be unset after mac80211 gives the OK for 581 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 582 * since only then is it guaranteed that no more frames are in the 583 * hardware queue. 584 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 585 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 586 * is for the whole aggregation. 587 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 588 * so consider using block ack request (BAR). 589 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 590 * set by rate control algorithms to indicate probe rate, will 591 * be cleared for fragmented frames (except on the last fragment) 592 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 593 * that a frame can be transmitted while the queues are stopped for 594 * off-channel operation. 595 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 596 * used to indicate that a pending frame requires TX processing before 597 * it can be sent out. 598 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 599 * used to indicate that a frame was already retried due to PS 600 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 601 * used to indicate frame should not be encrypted 602 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 603 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 604 * be sent although the station is in powersave mode. 605 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 606 * transmit function after the current frame, this can be used 607 * by drivers to kick the DMA queue only if unset or when the 608 * queue gets full. 609 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 610 * after TX status because the destination was asleep, it must not 611 * be modified again (no seqno assignment, crypto, etc.) 612 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 613 * code for connection establishment, this indicates that its status 614 * should kick the MLME state machine. 615 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 616 * MLME command (internal to mac80211 to figure out whether to send TX 617 * status to user space) 618 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 619 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 620 * frame and selects the maximum number of streams that it can use. 621 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 622 * the off-channel channel when a remain-on-channel offload is done 623 * in hardware -- normal packets still flow and are expected to be 624 * handled properly by the device. 625 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 626 * testing. It will be sent out with incorrect Michael MIC key to allow 627 * TKIP countermeasures to be tested. 628 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 629 * This flag is actually used for management frame especially for P2P 630 * frames not being sent at CCK rate in 2GHz band. 631 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 632 * when its status is reported the service period ends. For frames in 633 * an SP that mac80211 transmits, it is already set; for driver frames 634 * the driver may set this flag. It is also used to do the same for 635 * PS-Poll responses. 636 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 637 * This flag is used to send nullfunc frame at minimum rate when 638 * the nullfunc is used for connection monitoring purpose. 639 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 640 * would be fragmented by size (this is optional, only used for 641 * monitor injection). 642 * @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with 643 * IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without 644 * any errors (like issues specific to the driver/HW). 645 * This flag must not be set for frames that don't request no-ack 646 * behaviour with IEEE80211_TX_CTL_NO_ACK. 647 * 648 * Note: If you have to add new flags to the enumeration, then don't 649 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 650 */ 651 enum mac80211_tx_info_flags { 652 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 653 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 654 IEEE80211_TX_CTL_NO_ACK = BIT(2), 655 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 656 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 657 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 658 IEEE80211_TX_CTL_AMPDU = BIT(6), 659 IEEE80211_TX_CTL_INJECTED = BIT(7), 660 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 661 IEEE80211_TX_STAT_ACK = BIT(9), 662 IEEE80211_TX_STAT_AMPDU = BIT(10), 663 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 664 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 665 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 666 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 667 IEEE80211_TX_INTFL_RETRIED = BIT(15), 668 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 669 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 670 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 671 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 672 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 673 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 674 IEEE80211_TX_CTL_LDPC = BIT(22), 675 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 676 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 677 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 678 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 679 IEEE80211_TX_STATUS_EOSP = BIT(28), 680 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 681 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 682 IEEE80211_TX_STAT_NOACK_TRANSMITTED = BIT(31), 683 }; 684 685 #define IEEE80211_TX_CTL_STBC_SHIFT 23 686 687 /** 688 * enum mac80211_tx_control_flags - flags to describe transmit control 689 * 690 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 691 * protocol frame (e.g. EAP) 692 * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll 693 * frame (PS-Poll or uAPSD). 694 * 695 * These flags are used in tx_info->control.flags. 696 */ 697 enum mac80211_tx_control_flags { 698 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 699 IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1), 700 }; 701 702 /* 703 * This definition is used as a mask to clear all temporary flags, which are 704 * set by the tx handlers for each transmission attempt by the mac80211 stack. 705 */ 706 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 707 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 708 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 709 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 710 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 711 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 712 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 713 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 714 715 /** 716 * enum mac80211_rate_control_flags - per-rate flags set by the 717 * Rate Control algorithm. 718 * 719 * These flags are set by the Rate control algorithm for each rate during tx, 720 * in the @flags member of struct ieee80211_tx_rate. 721 * 722 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 723 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 724 * This is set if the current BSS requires ERP protection. 725 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 726 * @IEEE80211_TX_RC_MCS: HT rate. 727 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 728 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 729 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 730 * Greenfield mode. 731 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 732 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 733 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 734 * (80+80 isn't supported yet) 735 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 736 * adjacent 20 MHz channels, if the current channel type is 737 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 738 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 739 */ 740 enum mac80211_rate_control_flags { 741 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 742 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 743 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 744 745 /* rate index is an HT/VHT MCS instead of an index */ 746 IEEE80211_TX_RC_MCS = BIT(3), 747 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 748 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 749 IEEE80211_TX_RC_DUP_DATA = BIT(6), 750 IEEE80211_TX_RC_SHORT_GI = BIT(7), 751 IEEE80211_TX_RC_VHT_MCS = BIT(8), 752 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 753 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 754 }; 755 756 757 /* there are 40 bytes if you don't need the rateset to be kept */ 758 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 759 760 /* if you do need the rateset, then you have less space */ 761 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 762 763 /* maximum number of rate stages */ 764 #define IEEE80211_TX_MAX_RATES 4 765 766 /* maximum number of rate table entries */ 767 #define IEEE80211_TX_RATE_TABLE_SIZE 4 768 769 /** 770 * struct ieee80211_tx_rate - rate selection/status 771 * 772 * @idx: rate index to attempt to send with 773 * @flags: rate control flags (&enum mac80211_rate_control_flags) 774 * @count: number of tries in this rate before going to the next rate 775 * 776 * A value of -1 for @idx indicates an invalid rate and, if used 777 * in an array of retry rates, that no more rates should be tried. 778 * 779 * When used for transmit status reporting, the driver should 780 * always report the rate along with the flags it used. 781 * 782 * &struct ieee80211_tx_info contains an array of these structs 783 * in the control information, and it will be filled by the rate 784 * control algorithm according to what should be sent. For example, 785 * if this array contains, in the format { <idx>, <count> } the 786 * information 787 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 788 * then this means that the frame should be transmitted 789 * up to twice at rate 3, up to twice at rate 2, and up to four 790 * times at rate 1 if it doesn't get acknowledged. Say it gets 791 * acknowledged by the peer after the fifth attempt, the status 792 * information should then contain 793 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 794 * since it was transmitted twice at rate 3, twice at rate 2 795 * and once at rate 1 after which we received an acknowledgement. 796 */ 797 struct ieee80211_tx_rate { 798 s8 idx; 799 u16 count:5, 800 flags:11; 801 } __packed; 802 803 #define IEEE80211_MAX_TX_RETRY 31 804 805 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 806 u8 mcs, u8 nss) 807 { 808 WARN_ON(mcs & ~0xF); 809 WARN_ON((nss - 1) & ~0x7); 810 rate->idx = ((nss - 1) << 4) | mcs; 811 } 812 813 static inline u8 814 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 815 { 816 return rate->idx & 0xF; 817 } 818 819 static inline u8 820 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 821 { 822 return (rate->idx >> 4) + 1; 823 } 824 825 /** 826 * struct ieee80211_tx_info - skb transmit information 827 * 828 * This structure is placed in skb->cb for three uses: 829 * (1) mac80211 TX control - mac80211 tells the driver what to do 830 * (2) driver internal use (if applicable) 831 * (3) TX status information - driver tells mac80211 what happened 832 * 833 * @flags: transmit info flags, defined above 834 * @band: the band to transmit on (use for checking for races) 835 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 836 * @ack_frame_id: internal frame ID for TX status, used internally 837 * @control: union for control data 838 * @status: union for status data 839 * @driver_data: array of driver_data pointers 840 * @ampdu_ack_len: number of acked aggregated frames. 841 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 842 * @ampdu_len: number of aggregated frames. 843 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 844 * @ack_signal: signal strength of the ACK frame 845 */ 846 struct ieee80211_tx_info { 847 /* common information */ 848 u32 flags; 849 u8 band; 850 851 u8 hw_queue; 852 853 u16 ack_frame_id; 854 855 union { 856 struct { 857 union { 858 /* rate control */ 859 struct { 860 struct ieee80211_tx_rate rates[ 861 IEEE80211_TX_MAX_RATES]; 862 s8 rts_cts_rate_idx; 863 u8 use_rts:1; 864 u8 use_cts_prot:1; 865 u8 short_preamble:1; 866 u8 skip_table:1; 867 /* 2 bytes free */ 868 }; 869 /* only needed before rate control */ 870 unsigned long jiffies; 871 }; 872 /* NB: vif can be NULL for injected frames */ 873 struct ieee80211_vif *vif; 874 struct ieee80211_key_conf *hw_key; 875 u32 flags; 876 /* 4 bytes free */ 877 } control; 878 struct { 879 u64 cookie; 880 } ack; 881 struct { 882 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 883 s32 ack_signal; 884 u8 ampdu_ack_len; 885 u8 ampdu_len; 886 u8 antenna; 887 u16 tx_time; 888 void *status_driver_data[19 / sizeof(void *)]; 889 } status; 890 struct { 891 struct ieee80211_tx_rate driver_rates[ 892 IEEE80211_TX_MAX_RATES]; 893 u8 pad[4]; 894 895 void *rate_driver_data[ 896 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 897 }; 898 void *driver_data[ 899 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 900 }; 901 }; 902 903 /** 904 * struct ieee80211_scan_ies - descriptors for different blocks of IEs 905 * 906 * This structure is used to point to different blocks of IEs in HW scan 907 * and scheduled scan. These blocks contain the IEs passed by userspace 908 * and the ones generated by mac80211. 909 * 910 * @ies: pointers to band specific IEs. 911 * @len: lengths of band_specific IEs. 912 * @common_ies: IEs for all bands (especially vendor specific ones) 913 * @common_ie_len: length of the common_ies 914 */ 915 struct ieee80211_scan_ies { 916 const u8 *ies[IEEE80211_NUM_BANDS]; 917 size_t len[IEEE80211_NUM_BANDS]; 918 const u8 *common_ies; 919 size_t common_ie_len; 920 }; 921 922 923 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 924 { 925 return (struct ieee80211_tx_info *)skb->cb; 926 } 927 928 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 929 { 930 return (struct ieee80211_rx_status *)skb->cb; 931 } 932 933 /** 934 * ieee80211_tx_info_clear_status - clear TX status 935 * 936 * @info: The &struct ieee80211_tx_info to be cleared. 937 * 938 * When the driver passes an skb back to mac80211, it must report 939 * a number of things in TX status. This function clears everything 940 * in the TX status but the rate control information (it does clear 941 * the count since you need to fill that in anyway). 942 * 943 * NOTE: You can only use this function if you do NOT use 944 * info->driver_data! Use info->rate_driver_data 945 * instead if you need only the less space that allows. 946 */ 947 static inline void 948 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 949 { 950 int i; 951 952 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 953 offsetof(struct ieee80211_tx_info, control.rates)); 954 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 955 offsetof(struct ieee80211_tx_info, driver_rates)); 956 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 957 /* clear the rate counts */ 958 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 959 info->status.rates[i].count = 0; 960 961 BUILD_BUG_ON( 962 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 963 memset(&info->status.ampdu_ack_len, 0, 964 sizeof(struct ieee80211_tx_info) - 965 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 966 } 967 968 969 /** 970 * enum mac80211_rx_flags - receive flags 971 * 972 * These flags are used with the @flag member of &struct ieee80211_rx_status. 973 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 974 * Use together with %RX_FLAG_MMIC_STRIPPED. 975 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 976 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 977 * verification has been done by the hardware. 978 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 979 * If this flag is set, the stack cannot do any replay detection 980 * hence the driver or hardware will have to do that. 981 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this 982 * flag indicates that the PN was verified for replay protection. 983 * Note that this flag is also currently only supported when a frame 984 * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set) 985 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 986 * the frame. 987 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 988 * the frame. 989 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 990 * field) is valid and contains the time the first symbol of the MPDU 991 * was received. This is useful in monitor mode and for proper IBSS 992 * merging. 993 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 994 * field) is valid and contains the time the last symbol of the MPDU 995 * (including FCS) was received. 996 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 997 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 998 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 999 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 1000 * @RX_FLAG_SHORT_GI: Short guard interval was used 1001 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 1002 * Valid only for data frames (mainly A-MPDU) 1003 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 1004 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 1005 * to hw.radiotap_mcs_details to advertise that fact 1006 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 1007 * number (@ampdu_reference) must be populated and be a distinct number for 1008 * each A-MPDU 1009 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 1010 * subframes of a single A-MPDU 1011 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 1012 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 1013 * on this subframe 1014 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 1015 * is stored in the @ampdu_delimiter_crc field) 1016 * @RX_FLAG_LDPC: LDPC was used 1017 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 1018 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 1019 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 1020 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 1021 * subframes instead of a one huge frame for performance reasons. 1022 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 1023 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 1024 * the 3rd (last) one must not have this flag set. The flag is used to 1025 * deal with retransmission/duplication recovery properly since A-MSDU 1026 * subframes share the same sequence number. Reported subframes can be 1027 * either regular MSDU or singly A-MSDUs. Subframes must not be 1028 * interleaved with other frames. 1029 * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific 1030 * radiotap data in the skb->data (before the frame) as described by 1031 * the &struct ieee80211_vendor_radiotap. 1032 */ 1033 enum mac80211_rx_flags { 1034 RX_FLAG_MMIC_ERROR = BIT(0), 1035 RX_FLAG_DECRYPTED = BIT(1), 1036 RX_FLAG_MMIC_STRIPPED = BIT(3), 1037 RX_FLAG_IV_STRIPPED = BIT(4), 1038 RX_FLAG_FAILED_FCS_CRC = BIT(5), 1039 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 1040 RX_FLAG_MACTIME_START = BIT(7), 1041 RX_FLAG_SHORTPRE = BIT(8), 1042 RX_FLAG_HT = BIT(9), 1043 RX_FLAG_40MHZ = BIT(10), 1044 RX_FLAG_SHORT_GI = BIT(11), 1045 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 1046 RX_FLAG_HT_GF = BIT(13), 1047 RX_FLAG_AMPDU_DETAILS = BIT(14), 1048 RX_FLAG_PN_VALIDATED = BIT(15), 1049 /* bit 16 free */ 1050 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 1051 RX_FLAG_AMPDU_IS_LAST = BIT(18), 1052 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 1053 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 1054 RX_FLAG_MACTIME_END = BIT(21), 1055 RX_FLAG_VHT = BIT(22), 1056 RX_FLAG_LDPC = BIT(23), 1057 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 1058 RX_FLAG_10MHZ = BIT(28), 1059 RX_FLAG_5MHZ = BIT(29), 1060 RX_FLAG_AMSDU_MORE = BIT(30), 1061 RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), 1062 }; 1063 1064 #define RX_FLAG_STBC_SHIFT 26 1065 1066 /** 1067 * enum mac80211_rx_vht_flags - receive VHT flags 1068 * 1069 * These flags are used with the @vht_flag member of 1070 * &struct ieee80211_rx_status. 1071 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 1072 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 1073 * @RX_VHT_FLAG_BF: packet was beamformed 1074 */ 1075 enum mac80211_rx_vht_flags { 1076 RX_VHT_FLAG_80MHZ = BIT(0), 1077 RX_VHT_FLAG_160MHZ = BIT(1), 1078 RX_VHT_FLAG_BF = BIT(2), 1079 }; 1080 1081 /** 1082 * struct ieee80211_rx_status - receive status 1083 * 1084 * The low-level driver should provide this information (the subset 1085 * supported by hardware) to the 802.11 code with each received 1086 * frame, in the skb's control buffer (cb). 1087 * 1088 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 1089 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 1090 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 1091 * it but can store it and pass it back to the driver for synchronisation 1092 * @band: the active band when this frame was received 1093 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 1094 * @signal: signal strength when receiving this frame, either in dBm, in dB or 1095 * unspecified depending on the hardware capabilities flags 1096 * @IEEE80211_HW_SIGNAL_* 1097 * @chains: bitmask of receive chains for which separate signal strength 1098 * values were filled. 1099 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 1100 * support dB or unspecified units) 1101 * @antenna: antenna used 1102 * @rate_idx: index of data rate into band's supported rates or MCS index if 1103 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 1104 * @vht_nss: number of streams (VHT only) 1105 * @flag: %RX_FLAG_* 1106 * @vht_flag: %RX_VHT_FLAG_* 1107 * @rx_flags: internal RX flags for mac80211 1108 * @ampdu_reference: A-MPDU reference number, must be a different value for 1109 * each A-MPDU but the same for each subframe within one A-MPDU 1110 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 1111 */ 1112 struct ieee80211_rx_status { 1113 u64 mactime; 1114 u32 device_timestamp; 1115 u32 ampdu_reference; 1116 u32 flag; 1117 u16 freq; 1118 u8 vht_flag; 1119 u8 rate_idx; 1120 u8 vht_nss; 1121 u8 rx_flags; 1122 u8 band; 1123 u8 antenna; 1124 s8 signal; 1125 u8 chains; 1126 s8 chain_signal[IEEE80211_MAX_CHAINS]; 1127 u8 ampdu_delimiter_crc; 1128 }; 1129 1130 /** 1131 * struct ieee80211_vendor_radiotap - vendor radiotap data information 1132 * @present: presence bitmap for this vendor namespace 1133 * (this could be extended in the future if any vendor needs more 1134 * bits, the radiotap spec does allow for that) 1135 * @align: radiotap vendor namespace alignment. This defines the needed 1136 * alignment for the @data field below, not for the vendor namespace 1137 * description itself (which has a fixed 2-byte alignment) 1138 * Must be a power of two, and be set to at least 1! 1139 * @oui: radiotap vendor namespace OUI 1140 * @subns: radiotap vendor sub namespace 1141 * @len: radiotap vendor sub namespace skip length, if alignment is done 1142 * then that's added to this, i.e. this is only the length of the 1143 * @data field. 1144 * @pad: number of bytes of padding after the @data, this exists so that 1145 * the skb data alignment can be preserved even if the data has odd 1146 * length 1147 * @data: the actual vendor namespace data 1148 * 1149 * This struct, including the vendor data, goes into the skb->data before 1150 * the 802.11 header. It's split up in mac80211 using the align/oui/subns 1151 * data. 1152 */ 1153 struct ieee80211_vendor_radiotap { 1154 u32 present; 1155 u8 align; 1156 u8 oui[3]; 1157 u8 subns; 1158 u8 pad; 1159 u16 len; 1160 u8 data[]; 1161 } __packed; 1162 1163 /** 1164 * enum ieee80211_conf_flags - configuration flags 1165 * 1166 * Flags to define PHY configuration options 1167 * 1168 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 1169 * to determine for example whether to calculate timestamps for packets 1170 * or not, do not use instead of filter flags! 1171 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 1172 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 1173 * meaning that the hardware still wakes up for beacons, is able to 1174 * transmit frames and receive the possible acknowledgment frames. 1175 * Not to be confused with hardware specific wakeup/sleep states, 1176 * driver is responsible for that. See the section "Powersave support" 1177 * for more. 1178 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 1179 * the driver should be prepared to handle configuration requests but 1180 * may turn the device off as much as possible. Typically, this flag will 1181 * be set when an interface is set UP but not associated or scanning, but 1182 * it can also be unset in that case when monitor interfaces are active. 1183 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 1184 * operating channel. 1185 */ 1186 enum ieee80211_conf_flags { 1187 IEEE80211_CONF_MONITOR = (1<<0), 1188 IEEE80211_CONF_PS = (1<<1), 1189 IEEE80211_CONF_IDLE = (1<<2), 1190 IEEE80211_CONF_OFFCHANNEL = (1<<3), 1191 }; 1192 1193 1194 /** 1195 * enum ieee80211_conf_changed - denotes which configuration changed 1196 * 1197 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 1198 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 1199 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 1200 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 1201 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 1202 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 1203 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 1204 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 1205 * Note that this is only valid if channel contexts are not used, 1206 * otherwise each channel context has the number of chains listed. 1207 */ 1208 enum ieee80211_conf_changed { 1209 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 1210 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 1211 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 1212 IEEE80211_CONF_CHANGE_PS = BIT(4), 1213 IEEE80211_CONF_CHANGE_POWER = BIT(5), 1214 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 1215 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 1216 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 1217 }; 1218 1219 /** 1220 * enum ieee80211_smps_mode - spatial multiplexing power save mode 1221 * 1222 * @IEEE80211_SMPS_AUTOMATIC: automatic 1223 * @IEEE80211_SMPS_OFF: off 1224 * @IEEE80211_SMPS_STATIC: static 1225 * @IEEE80211_SMPS_DYNAMIC: dynamic 1226 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1227 */ 1228 enum ieee80211_smps_mode { 1229 IEEE80211_SMPS_AUTOMATIC, 1230 IEEE80211_SMPS_OFF, 1231 IEEE80211_SMPS_STATIC, 1232 IEEE80211_SMPS_DYNAMIC, 1233 1234 /* keep last */ 1235 IEEE80211_SMPS_NUM_MODES, 1236 }; 1237 1238 /** 1239 * struct ieee80211_conf - configuration of the device 1240 * 1241 * This struct indicates how the driver shall configure the hardware. 1242 * 1243 * @flags: configuration flags defined above 1244 * 1245 * @listen_interval: listen interval in units of beacon interval 1246 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1247 * in power saving. Power saving will not be enabled until a beacon 1248 * has been received and the DTIM period is known. 1249 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1250 * powersave documentation below. This variable is valid only when 1251 * the CONF_PS flag is set. 1252 * 1253 * @power_level: requested transmit power (in dBm), backward compatibility 1254 * value only that is set to the minimum of all interfaces 1255 * 1256 * @chandef: the channel definition to tune to 1257 * @radar_enabled: whether radar detection is enabled 1258 * 1259 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1260 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1261 * but actually means the number of transmissions not the number of retries 1262 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1263 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1264 * number of transmissions not the number of retries 1265 * 1266 * @smps_mode: spatial multiplexing powersave mode; note that 1267 * %IEEE80211_SMPS_STATIC is used when the device is not 1268 * configured for an HT channel. 1269 * Note that this is only valid if channel contexts are not used, 1270 * otherwise each channel context has the number of chains listed. 1271 */ 1272 struct ieee80211_conf { 1273 u32 flags; 1274 int power_level, dynamic_ps_timeout; 1275 1276 u16 listen_interval; 1277 u8 ps_dtim_period; 1278 1279 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1280 1281 struct cfg80211_chan_def chandef; 1282 bool radar_enabled; 1283 enum ieee80211_smps_mode smps_mode; 1284 }; 1285 1286 /** 1287 * struct ieee80211_channel_switch - holds the channel switch data 1288 * 1289 * The information provided in this structure is required for channel switch 1290 * operation. 1291 * 1292 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1293 * Function (TSF) timer when the frame containing the channel switch 1294 * announcement was received. This is simply the rx.mactime parameter 1295 * the driver passed into mac80211. 1296 * @device_timestamp: arbitrary timestamp for the device, this is the 1297 * rx.device_timestamp parameter the driver passed to mac80211. 1298 * @block_tx: Indicates whether transmission must be blocked before the 1299 * scheduled channel switch, as indicated by the AP. 1300 * @chandef: the new channel to switch to 1301 * @count: the number of TBTT's until the channel switch event 1302 */ 1303 struct ieee80211_channel_switch { 1304 u64 timestamp; 1305 u32 device_timestamp; 1306 bool block_tx; 1307 struct cfg80211_chan_def chandef; 1308 u8 count; 1309 }; 1310 1311 /** 1312 * enum ieee80211_vif_flags - virtual interface flags 1313 * 1314 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1315 * on this virtual interface to avoid unnecessary CPU wakeups 1316 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1317 * monitoring on this virtual interface -- i.e. it can monitor 1318 * connection quality related parameters, such as the RSSI level and 1319 * provide notifications if configured trigger levels are reached. 1320 * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this 1321 * interface. This flag should be set during interface addition, 1322 * but may be set/cleared as late as authentication to an AP. It is 1323 * only valid for managed/station mode interfaces. 1324 * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes 1325 * and send P2P_PS notification to the driver if NOA changed, even 1326 * this is not pure P2P vif. 1327 */ 1328 enum ieee80211_vif_flags { 1329 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1330 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1331 IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2), 1332 IEEE80211_VIF_GET_NOA_UPDATE = BIT(3), 1333 }; 1334 1335 /** 1336 * struct ieee80211_vif - per-interface data 1337 * 1338 * Data in this structure is continually present for driver 1339 * use during the life of a virtual interface. 1340 * 1341 * @type: type of this virtual interface 1342 * @bss_conf: BSS configuration for this interface, either our own 1343 * or the BSS we're associated to 1344 * @addr: address of this interface 1345 * @p2p: indicates whether this AP or STA interface is a p2p 1346 * interface, i.e. a GO or p2p-sta respectively 1347 * @csa_active: marks whether a channel switch is going on. Internally it is 1348 * write-protected by sdata_lock and local->mtx so holding either is fine 1349 * for read access. 1350 * @driver_flags: flags/capabilities the driver has for this interface, 1351 * these need to be set (or cleared) when the interface is added 1352 * or, if supported by the driver, the interface type is changed 1353 * at runtime, mac80211 will never touch this field 1354 * @hw_queue: hardware queue for each AC 1355 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1356 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1357 * when it is not assigned. This pointer is RCU-protected due to the TX 1358 * path needing to access it; even though the netdev carrier will always 1359 * be off when it is %NULL there can still be races and packets could be 1360 * processed after it switches back to %NULL. 1361 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1362 * interface debug files. Note that it will be NULL for the virtual 1363 * monitor interface (if that is requested.) 1364 * @probe_req_reg: probe requests should be reported to mac80211 for this 1365 * interface. 1366 * @drv_priv: data area for driver use, will always be aligned to 1367 * sizeof(void *). 1368 * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) 1369 */ 1370 struct ieee80211_vif { 1371 enum nl80211_iftype type; 1372 struct ieee80211_bss_conf bss_conf; 1373 u8 addr[ETH_ALEN]; 1374 bool p2p; 1375 bool csa_active; 1376 1377 u8 cab_queue; 1378 u8 hw_queue[IEEE80211_NUM_ACS]; 1379 1380 struct ieee80211_txq *txq; 1381 1382 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1383 1384 u32 driver_flags; 1385 1386 #ifdef CONFIG_MAC80211_DEBUGFS 1387 struct dentry *debugfs_dir; 1388 #endif 1389 1390 unsigned int probe_req_reg; 1391 1392 /* must be last */ 1393 u8 drv_priv[0] __aligned(sizeof(void *)); 1394 }; 1395 1396 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1397 { 1398 #ifdef CONFIG_MAC80211_MESH 1399 return vif->type == NL80211_IFTYPE_MESH_POINT; 1400 #endif 1401 return false; 1402 } 1403 1404 /** 1405 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1406 * @wdev: the wdev to get the vif for 1407 * 1408 * This can be used by mac80211 drivers with direct cfg80211 APIs 1409 * (like the vendor commands) that get a wdev. 1410 * 1411 * Note that this function may return %NULL if the given wdev isn't 1412 * associated with a vif that the driver knows about (e.g. monitor 1413 * or AP_VLAN interfaces.) 1414 */ 1415 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1416 1417 /** 1418 * ieee80211_vif_to_wdev - return a wdev struct from a vif 1419 * @vif: the vif to get the wdev for 1420 * 1421 * This can be used by mac80211 drivers with direct cfg80211 APIs 1422 * (like the vendor commands) that needs to get the wdev for a vif. 1423 * 1424 * Note that this function may return %NULL if the given wdev isn't 1425 * associated with a vif that the driver knows about (e.g. monitor 1426 * or AP_VLAN interfaces.) 1427 */ 1428 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); 1429 1430 /** 1431 * enum ieee80211_key_flags - key flags 1432 * 1433 * These flags are used for communication about keys between the driver 1434 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1435 * 1436 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1437 * driver to indicate that it requires IV generation for this 1438 * particular key. Setting this flag does not necessarily mean that SKBs 1439 * will have sufficient tailroom for ICV or MIC. 1440 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1441 * the driver for a TKIP key if it requires Michael MIC 1442 * generation in software. 1443 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1444 * that the key is pairwise rather then a shared key. 1445 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1446 * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames 1447 * (MFP) to be done in software. 1448 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1449 * if space should be prepared for the IV, but the IV 1450 * itself should not be generated. Do not set together with 1451 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does 1452 * not necessarily mean that SKBs will have sufficient tailroom for ICV or 1453 * MIC. 1454 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1455 * management frames. The flag can help drivers that have a hardware 1456 * crypto implementation that doesn't deal with management frames 1457 * properly by allowing them to not upload the keys to hardware and 1458 * fall back to software crypto. Note that this flag deals only with 1459 * RX, if your crypto engine can't deal with TX you can also set the 1460 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1461 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the 1462 * driver for a CCMP/GCMP key to indicate that is requires IV generation 1463 * only for managment frames (MFP). 1464 * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the 1465 * driver for a key to indicate that sufficient tailroom must always 1466 * be reserved for ICV or MIC, even when HW encryption is enabled. 1467 */ 1468 enum ieee80211_key_flags { 1469 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), 1470 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), 1471 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), 1472 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), 1473 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), 1474 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), 1475 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), 1476 IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7), 1477 }; 1478 1479 /** 1480 * struct ieee80211_key_conf - key information 1481 * 1482 * This key information is given by mac80211 to the driver by 1483 * the set_key() callback in &struct ieee80211_ops. 1484 * 1485 * @hw_key_idx: To be set by the driver, this is the key index the driver 1486 * wants to be given when a frame is transmitted and needs to be 1487 * encrypted in hardware. 1488 * @cipher: The key's cipher suite selector. 1489 * @tx_pn: PN used for TX on non-TKIP keys, may be used by the driver 1490 * as well if it needs to do software PN assignment by itself 1491 * (e.g. due to TSO) 1492 * @flags: key flags, see &enum ieee80211_key_flags. 1493 * @keyidx: the key index (0-3) 1494 * @keylen: key material length 1495 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1496 * data block: 1497 * - Temporal Encryption Key (128 bits) 1498 * - Temporal Authenticator Tx MIC Key (64 bits) 1499 * - Temporal Authenticator Rx MIC Key (64 bits) 1500 * @icv_len: The ICV length for this key type 1501 * @iv_len: The IV length for this key type 1502 */ 1503 struct ieee80211_key_conf { 1504 atomic64_t tx_pn; 1505 u32 cipher; 1506 u8 icv_len; 1507 u8 iv_len; 1508 u8 hw_key_idx; 1509 u8 flags; 1510 s8 keyidx; 1511 u8 keylen; 1512 u8 key[0]; 1513 }; 1514 1515 #define IEEE80211_MAX_PN_LEN 16 1516 1517 /** 1518 * struct ieee80211_key_seq - key sequence counter 1519 * 1520 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 1521 * @ccmp: PN data, most significant byte first (big endian, 1522 * reverse order than in packet) 1523 * @aes_cmac: PN data, most significant byte first (big endian, 1524 * reverse order than in packet) 1525 * @aes_gmac: PN data, most significant byte first (big endian, 1526 * reverse order than in packet) 1527 * @gcmp: PN data, most significant byte first (big endian, 1528 * reverse order than in packet) 1529 * @hw: data for HW-only (e.g. cipher scheme) keys 1530 */ 1531 struct ieee80211_key_seq { 1532 union { 1533 struct { 1534 u32 iv32; 1535 u16 iv16; 1536 } tkip; 1537 struct { 1538 u8 pn[6]; 1539 } ccmp; 1540 struct { 1541 u8 pn[6]; 1542 } aes_cmac; 1543 struct { 1544 u8 pn[6]; 1545 } aes_gmac; 1546 struct { 1547 u8 pn[6]; 1548 } gcmp; 1549 struct { 1550 u8 seq[IEEE80211_MAX_PN_LEN]; 1551 u8 seq_len; 1552 } hw; 1553 }; 1554 }; 1555 1556 /** 1557 * struct ieee80211_cipher_scheme - cipher scheme 1558 * 1559 * This structure contains a cipher scheme information defining 1560 * the secure packet crypto handling. 1561 * 1562 * @cipher: a cipher suite selector 1563 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1564 * @hdr_len: a length of a security header used the cipher 1565 * @pn_len: a length of a packet number in the security header 1566 * @pn_off: an offset of pn from the beginning of the security header 1567 * @key_idx_off: an offset of key index byte in the security header 1568 * @key_idx_mask: a bit mask of key_idx bits 1569 * @key_idx_shift: a bit shift needed to get key_idx 1570 * key_idx value calculation: 1571 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1572 * @mic_len: a mic length in bytes 1573 */ 1574 struct ieee80211_cipher_scheme { 1575 u32 cipher; 1576 u16 iftype; 1577 u8 hdr_len; 1578 u8 pn_len; 1579 u8 pn_off; 1580 u8 key_idx_off; 1581 u8 key_idx_mask; 1582 u8 key_idx_shift; 1583 u8 mic_len; 1584 }; 1585 1586 /** 1587 * enum set_key_cmd - key command 1588 * 1589 * Used with the set_key() callback in &struct ieee80211_ops, this 1590 * indicates whether a key is being removed or added. 1591 * 1592 * @SET_KEY: a key is set 1593 * @DISABLE_KEY: a key must be disabled 1594 */ 1595 enum set_key_cmd { 1596 SET_KEY, DISABLE_KEY, 1597 }; 1598 1599 /** 1600 * enum ieee80211_sta_state - station state 1601 * 1602 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1603 * this is a special state for add/remove transitions 1604 * @IEEE80211_STA_NONE: station exists without special state 1605 * @IEEE80211_STA_AUTH: station is authenticated 1606 * @IEEE80211_STA_ASSOC: station is associated 1607 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1608 */ 1609 enum ieee80211_sta_state { 1610 /* NOTE: These need to be ordered correctly! */ 1611 IEEE80211_STA_NOTEXIST, 1612 IEEE80211_STA_NONE, 1613 IEEE80211_STA_AUTH, 1614 IEEE80211_STA_ASSOC, 1615 IEEE80211_STA_AUTHORIZED, 1616 }; 1617 1618 /** 1619 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1620 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1621 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1622 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1623 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1624 * (including 80+80 MHz) 1625 * 1626 * Implementation note: 20 must be zero to be initialized 1627 * correctly, the values must be sorted. 1628 */ 1629 enum ieee80211_sta_rx_bandwidth { 1630 IEEE80211_STA_RX_BW_20 = 0, 1631 IEEE80211_STA_RX_BW_40, 1632 IEEE80211_STA_RX_BW_80, 1633 IEEE80211_STA_RX_BW_160, 1634 }; 1635 1636 /** 1637 * struct ieee80211_sta_rates - station rate selection table 1638 * 1639 * @rcu_head: RCU head used for freeing the table on update 1640 * @rate: transmit rates/flags to be used by default. 1641 * Overriding entries per-packet is possible by using cb tx control. 1642 */ 1643 struct ieee80211_sta_rates { 1644 struct rcu_head rcu_head; 1645 struct { 1646 s8 idx; 1647 u8 count; 1648 u8 count_cts; 1649 u8 count_rts; 1650 u16 flags; 1651 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1652 }; 1653 1654 /** 1655 * struct ieee80211_sta - station table entry 1656 * 1657 * A station table entry represents a station we are possibly 1658 * communicating with. Since stations are RCU-managed in 1659 * mac80211, any ieee80211_sta pointer you get access to must 1660 * either be protected by rcu_read_lock() explicitly or implicitly, 1661 * or you must take good care to not use such a pointer after a 1662 * call to your sta_remove callback that removed it. 1663 * 1664 * @addr: MAC address 1665 * @aid: AID we assigned to the station if we're an AP 1666 * @supp_rates: Bitmap of supported rates (per band) 1667 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1668 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1669 * @wme: indicates whether the STA supports QoS/WME (if local devices does, 1670 * otherwise always false) 1671 * @drv_priv: data area for driver use, will always be aligned to 1672 * sizeof(void *), size is determined in hw information. 1673 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1674 * if wme is supported. 1675 * @max_sp: max Service Period. Only valid if wme is supported. 1676 * @bandwidth: current bandwidth the station can receive with 1677 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1678 * station can receive at the moment, changed by operating mode 1679 * notifications and capabilities. The value is only valid after 1680 * the station moves to associated state. 1681 * @smps_mode: current SMPS mode (off, static or dynamic) 1682 * @rates: rate control selection table 1683 * @tdls: indicates whether the STA is a TDLS peer 1684 * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only 1685 * valid if the STA is a TDLS peer in the first place. 1686 * @mfp: indicates whether the STA uses management frame protection or not. 1687 * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) 1688 */ 1689 struct ieee80211_sta { 1690 u32 supp_rates[IEEE80211_NUM_BANDS]; 1691 u8 addr[ETH_ALEN]; 1692 u16 aid; 1693 struct ieee80211_sta_ht_cap ht_cap; 1694 struct ieee80211_sta_vht_cap vht_cap; 1695 bool wme; 1696 u8 uapsd_queues; 1697 u8 max_sp; 1698 u8 rx_nss; 1699 enum ieee80211_sta_rx_bandwidth bandwidth; 1700 enum ieee80211_smps_mode smps_mode; 1701 struct ieee80211_sta_rates __rcu *rates; 1702 bool tdls; 1703 bool tdls_initiator; 1704 bool mfp; 1705 1706 struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; 1707 1708 /* must be last */ 1709 u8 drv_priv[0] __aligned(sizeof(void *)); 1710 }; 1711 1712 /** 1713 * enum sta_notify_cmd - sta notify command 1714 * 1715 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1716 * indicates if an associated station made a power state transition. 1717 * 1718 * @STA_NOTIFY_SLEEP: a station is now sleeping 1719 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1720 */ 1721 enum sta_notify_cmd { 1722 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1723 }; 1724 1725 /** 1726 * struct ieee80211_tx_control - TX control data 1727 * 1728 * @sta: station table entry, this sta pointer may be NULL and 1729 * it is not allowed to copy the pointer, due to RCU. 1730 */ 1731 struct ieee80211_tx_control { 1732 struct ieee80211_sta *sta; 1733 }; 1734 1735 /** 1736 * struct ieee80211_txq - Software intermediate tx queue 1737 * 1738 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 1739 * @sta: station table entry, %NULL for per-vif queue 1740 * @tid: the TID for this queue (unused for per-vif queue) 1741 * @ac: the AC for this queue 1742 * @drv_priv: driver private area, sized by hw->txq_data_size 1743 * 1744 * The driver can obtain packets from this queue by calling 1745 * ieee80211_tx_dequeue(). 1746 */ 1747 struct ieee80211_txq { 1748 struct ieee80211_vif *vif; 1749 struct ieee80211_sta *sta; 1750 u8 tid; 1751 u8 ac; 1752 1753 /* must be last */ 1754 u8 drv_priv[0] __aligned(sizeof(void *)); 1755 }; 1756 1757 /** 1758 * enum ieee80211_hw_flags - hardware flags 1759 * 1760 * These flags are used to indicate hardware capabilities to 1761 * the stack. Generally, flags here should have their meaning 1762 * done in a way that the simplest hardware doesn't need setting 1763 * any particular flags. There are some exceptions to this rule, 1764 * however, so you are advised to review these flags carefully. 1765 * 1766 * @IEEE80211_HW_HAS_RATE_CONTROL: 1767 * The hardware or firmware includes rate control, and cannot be 1768 * controlled by the stack. As such, no rate control algorithm 1769 * should be instantiated, and the TX rate reported to userspace 1770 * will be taken from the TX status instead of the rate control 1771 * algorithm. 1772 * Note that this requires that the driver implement a number of 1773 * callbacks so it has the correct information, it needs to have 1774 * the @set_rts_threshold callback and must look at the BSS config 1775 * @use_cts_prot for G/N protection, @use_short_slot for slot 1776 * timing in 2.4 GHz and @use_short_preamble for preambles for 1777 * CCK frames. 1778 * 1779 * @IEEE80211_HW_RX_INCLUDES_FCS: 1780 * Indicates that received frames passed to the stack include 1781 * the FCS at the end. 1782 * 1783 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1784 * Some wireless LAN chipsets buffer broadcast/multicast frames 1785 * for power saving stations in the hardware/firmware and others 1786 * rely on the host system for such buffering. This option is used 1787 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1788 * multicast frames when there are power saving stations so that 1789 * the driver can fetch them with ieee80211_get_buffered_bc(). 1790 * 1791 * @IEEE80211_HW_SIGNAL_UNSPEC: 1792 * Hardware can provide signal values but we don't know its units. We 1793 * expect values between 0 and @max_signal. 1794 * If possible please provide dB or dBm instead. 1795 * 1796 * @IEEE80211_HW_SIGNAL_DBM: 1797 * Hardware gives signal values in dBm, decibel difference from 1798 * one milliwatt. This is the preferred method since it is standardized 1799 * between different devices. @max_signal does not need to be set. 1800 * 1801 * @IEEE80211_HW_SPECTRUM_MGMT: 1802 * Hardware supports spectrum management defined in 802.11h 1803 * Measurement, Channel Switch, Quieting, TPC 1804 * 1805 * @IEEE80211_HW_AMPDU_AGGREGATION: 1806 * Hardware supports 11n A-MPDU aggregation. 1807 * 1808 * @IEEE80211_HW_SUPPORTS_PS: 1809 * Hardware has power save support (i.e. can go to sleep). 1810 * 1811 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1812 * Hardware requires nullfunc frame handling in stack, implies 1813 * stack support for dynamic PS. 1814 * 1815 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1816 * Hardware has support for dynamic PS. 1817 * 1818 * @IEEE80211_HW_MFP_CAPABLE: 1819 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1820 * 1821 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1822 * Hardware can provide ack status reports of Tx frames to 1823 * the stack. 1824 * 1825 * @IEEE80211_HW_CONNECTION_MONITOR: 1826 * The hardware performs its own connection monitoring, including 1827 * periodic keep-alives to the AP and probing the AP on beacon loss. 1828 * 1829 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1830 * This device needs to get data from beacon before association (i.e. 1831 * dtim_period). 1832 * 1833 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1834 * per-station GTKs as used by IBSS RSN or during fast transition. If 1835 * the device doesn't support per-station GTKs, but can be asked not 1836 * to decrypt group addressed frames, then IBSS RSN support is still 1837 * possible but software crypto will be used. Advertise the wiphy flag 1838 * only in that case. 1839 * 1840 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1841 * autonomously manages the PS status of connected stations. When 1842 * this flag is set mac80211 will not trigger PS mode for connected 1843 * stations based on the PM bit of incoming frames. 1844 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1845 * the PS mode of connected stations. 1846 * 1847 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1848 * setup strictly in HW. mac80211 should not attempt to do this in 1849 * software. 1850 * 1851 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1852 * a virtual monitor interface when monitor interfaces are the only 1853 * active interfaces. 1854 * 1855 * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to 1856 * be created. It is expected user-space will create vifs as 1857 * desired (and thus have them named as desired). 1858 * 1859 * @IEEE80211_HW_SW_CRYPTO_CONTROL: The driver wants to control which of the 1860 * crypto algorithms can be done in software - so don't automatically 1861 * try to fall back to it if hardware crypto fails, but do so only if 1862 * the driver returns 1. This also forces the driver to advertise its 1863 * supported cipher suites. 1864 * 1865 * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit, 1866 * this currently requires only the ability to calculate the duration 1867 * for frames. 1868 * 1869 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1870 * queue mapping in order to use different queues (not just one per AC) 1871 * for different virtual interfaces. See the doc section on HW queue 1872 * control for more details. 1873 * 1874 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1875 * selection table provided by the rate control algorithm. 1876 * 1877 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1878 * P2P Interface. This will be honoured even if more than one interface 1879 * is supported. 1880 * 1881 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1882 * only, to allow getting TBTT of a DTIM beacon. 1883 * 1884 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1885 * and can cope with CCK rates in an aggregation session (e.g. by not 1886 * using aggregation for such frames.) 1887 * 1888 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1889 * for a single active channel while using channel contexts. When support 1890 * is not enabled the default action is to disconnect when getting the 1891 * CSA frame. 1892 * 1893 * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload 1894 * or tailroom of TX skbs without copying them first. 1895 * 1896 * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands 1897 * in one command, mac80211 doesn't have to run separate scans per band. 1898 * 1899 * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth 1900 * than then BSS bandwidth for a TDLS link on the base channel. 1901 * 1902 * @IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU: The driver supports receiving A-MSDUs 1903 * within A-MPDU. 1904 * 1905 * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status 1906 * for sent beacons. 1907 * 1908 * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each 1909 * station has a unique address, i.e. each station entry can be identified 1910 * by just its MAC address; this prevents, for example, the same station 1911 * from connecting to two virtual AP interfaces at the same time. 1912 * 1913 * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays 1914 */ 1915 enum ieee80211_hw_flags { 1916 IEEE80211_HW_HAS_RATE_CONTROL, 1917 IEEE80211_HW_RX_INCLUDES_FCS, 1918 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING, 1919 IEEE80211_HW_SIGNAL_UNSPEC, 1920 IEEE80211_HW_SIGNAL_DBM, 1921 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC, 1922 IEEE80211_HW_SPECTRUM_MGMT, 1923 IEEE80211_HW_AMPDU_AGGREGATION, 1924 IEEE80211_HW_SUPPORTS_PS, 1925 IEEE80211_HW_PS_NULLFUNC_STACK, 1926 IEEE80211_HW_SUPPORTS_DYNAMIC_PS, 1927 IEEE80211_HW_MFP_CAPABLE, 1928 IEEE80211_HW_WANT_MONITOR_VIF, 1929 IEEE80211_HW_NO_AUTO_VIF, 1930 IEEE80211_HW_SW_CRYPTO_CONTROL, 1931 IEEE80211_HW_SUPPORT_FAST_XMIT, 1932 IEEE80211_HW_REPORTS_TX_ACK_STATUS, 1933 IEEE80211_HW_CONNECTION_MONITOR, 1934 IEEE80211_HW_QUEUE_CONTROL, 1935 IEEE80211_HW_SUPPORTS_PER_STA_GTK, 1936 IEEE80211_HW_AP_LINK_PS, 1937 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW, 1938 IEEE80211_HW_SUPPORTS_RC_TABLE, 1939 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF, 1940 IEEE80211_HW_TIMING_BEACON_ONLY, 1941 IEEE80211_HW_SUPPORTS_HT_CCK_RATES, 1942 IEEE80211_HW_CHANCTX_STA_CSA, 1943 IEEE80211_HW_SUPPORTS_CLONED_SKBS, 1944 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS, 1945 IEEE80211_HW_TDLS_WIDER_BW, 1946 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU, 1947 IEEE80211_HW_BEACON_TX_STATUS, 1948 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR, 1949 1950 /* keep last, obviously */ 1951 NUM_IEEE80211_HW_FLAGS 1952 }; 1953 1954 /** 1955 * struct ieee80211_hw - hardware information and state 1956 * 1957 * This structure contains the configuration and hardware 1958 * information for an 802.11 PHY. 1959 * 1960 * @wiphy: This points to the &struct wiphy allocated for this 1961 * 802.11 PHY. You must fill in the @perm_addr and @dev 1962 * members of this structure using SET_IEEE80211_DEV() 1963 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1964 * bands (with channels, bitrates) are registered here. 1965 * 1966 * @conf: &struct ieee80211_conf, device configuration, don't use. 1967 * 1968 * @priv: pointer to private area that was allocated for driver use 1969 * along with this structure. 1970 * 1971 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1972 * 1973 * @extra_tx_headroom: headroom to reserve in each transmit skb 1974 * for use by the driver (e.g. for transmit headers.) 1975 * 1976 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 1977 * Can be used by drivers to add extra IEs. 1978 * 1979 * @max_signal: Maximum value for signal (rssi) in RX information, used 1980 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1981 * 1982 * @max_listen_interval: max listen interval in units of beacon interval 1983 * that HW supports 1984 * 1985 * @queues: number of available hardware transmit queues for 1986 * data packets. WMM/QoS requires at least four, these 1987 * queues need to have configurable access parameters. 1988 * 1989 * @rate_control_algorithm: rate control algorithm for this hardware. 1990 * If unset (NULL), the default algorithm will be used. Must be 1991 * set before calling ieee80211_register_hw(). 1992 * 1993 * @vif_data_size: size (in bytes) of the drv_priv data area 1994 * within &struct ieee80211_vif. 1995 * @sta_data_size: size (in bytes) of the drv_priv data area 1996 * within &struct ieee80211_sta. 1997 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1998 * within &struct ieee80211_chanctx_conf. 1999 * @txq_data_size: size (in bytes) of the drv_priv data area 2000 * within @struct ieee80211_txq. 2001 * 2002 * @max_rates: maximum number of alternate rate retry stages the hw 2003 * can handle. 2004 * @max_report_rates: maximum number of alternate rate retry stages 2005 * the hw can report back. 2006 * @max_rate_tries: maximum number of tries for each stage 2007 * 2008 * @max_rx_aggregation_subframes: maximum buffer size (number of 2009 * sub-frames) to be used for A-MPDU block ack receiver 2010 * aggregation. 2011 * This is only relevant if the device has restrictions on the 2012 * number of subframes, if it relies on mac80211 to do reordering 2013 * it shouldn't be set. 2014 * 2015 * @max_tx_aggregation_subframes: maximum number of subframes in an 2016 * aggregate an HT driver will transmit. Though ADDBA will advertise 2017 * a constant value of 64 as some older APs can crash if the window 2018 * size is smaller (an example is LinkSys WRT120N with FW v1.0.07 2019 * build 002 Jun 18 2012). 2020 * 2021 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 2022 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 2023 * 2024 * @radiotap_mcs_details: lists which MCS information can the HW 2025 * reports, by default it is set to _MCS, _GI and _BW but doesn't 2026 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 2027 * adding _BW is supported today. 2028 * 2029 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 2030 * the default is _GI | _BANDWIDTH. 2031 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 2032 * 2033 * @netdev_features: netdev features to be set in each netdev created 2034 * from this HW. Note that not all features are usable with mac80211, 2035 * other features will be rejected during HW registration. 2036 * 2037 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 2038 * for each access category if it is uAPSD trigger-enabled and delivery- 2039 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 2040 * Each bit corresponds to different AC. Value '1' in specific bit means 2041 * that corresponding AC is both trigger- and delivery-enabled. '0' means 2042 * neither enabled. 2043 * 2044 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 2045 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 2046 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 2047 * 2048 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 2049 * @cipher_schemes: a pointer to an array of cipher scheme definitions 2050 * supported by HW. 2051 * 2052 * @txq_ac_max_pending: maximum number of frames per AC pending in all txq 2053 * entries for a vif. 2054 */ 2055 struct ieee80211_hw { 2056 struct ieee80211_conf conf; 2057 struct wiphy *wiphy; 2058 const char *rate_control_algorithm; 2059 void *priv; 2060 unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)]; 2061 unsigned int extra_tx_headroom; 2062 unsigned int extra_beacon_tailroom; 2063 int vif_data_size; 2064 int sta_data_size; 2065 int chanctx_data_size; 2066 int txq_data_size; 2067 u16 queues; 2068 u16 max_listen_interval; 2069 s8 max_signal; 2070 u8 max_rates; 2071 u8 max_report_rates; 2072 u8 max_rate_tries; 2073 u8 max_rx_aggregation_subframes; 2074 u8 max_tx_aggregation_subframes; 2075 u8 offchannel_tx_hw_queue; 2076 u8 radiotap_mcs_details; 2077 u16 radiotap_vht_details; 2078 netdev_features_t netdev_features; 2079 u8 uapsd_queues; 2080 u8 uapsd_max_sp_len; 2081 u8 n_cipher_schemes; 2082 const struct ieee80211_cipher_scheme *cipher_schemes; 2083 int txq_ac_max_pending; 2084 }; 2085 2086 static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw, 2087 enum ieee80211_hw_flags flg) 2088 { 2089 return test_bit(flg, hw->flags); 2090 } 2091 #define ieee80211_hw_check(hw, flg) _ieee80211_hw_check(hw, IEEE80211_HW_##flg) 2092 2093 static inline void _ieee80211_hw_set(struct ieee80211_hw *hw, 2094 enum ieee80211_hw_flags flg) 2095 { 2096 return __set_bit(flg, hw->flags); 2097 } 2098 #define ieee80211_hw_set(hw, flg) _ieee80211_hw_set(hw, IEEE80211_HW_##flg) 2099 2100 /** 2101 * struct ieee80211_scan_request - hw scan request 2102 * 2103 * @ies: pointers different parts of IEs (in req.ie) 2104 * @req: cfg80211 request. 2105 */ 2106 struct ieee80211_scan_request { 2107 struct ieee80211_scan_ies ies; 2108 2109 /* Keep last */ 2110 struct cfg80211_scan_request req; 2111 }; 2112 2113 /** 2114 * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters 2115 * 2116 * @sta: peer this TDLS channel-switch request/response came from 2117 * @chandef: channel referenced in a TDLS channel-switch request 2118 * @action_code: see &enum ieee80211_tdls_actioncode 2119 * @status: channel-switch response status 2120 * @timestamp: time at which the frame was received 2121 * @switch_time: switch-timing parameter received in the frame 2122 * @switch_timeout: switch-timing parameter received in the frame 2123 * @tmpl_skb: TDLS switch-channel response template 2124 * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb 2125 */ 2126 struct ieee80211_tdls_ch_sw_params { 2127 struct ieee80211_sta *sta; 2128 struct cfg80211_chan_def *chandef; 2129 u8 action_code; 2130 u32 status; 2131 u32 timestamp; 2132 u16 switch_time; 2133 u16 switch_timeout; 2134 struct sk_buff *tmpl_skb; 2135 u32 ch_sw_tm_ie; 2136 }; 2137 2138 /** 2139 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 2140 * 2141 * @wiphy: the &struct wiphy which we want to query 2142 * 2143 * mac80211 drivers can use this to get to their respective 2144 * &struct ieee80211_hw. Drivers wishing to get to their own private 2145 * structure can then access it via hw->priv. Note that mac802111 drivers should 2146 * not use wiphy_priv() to try to get their private driver structure as this 2147 * is already used internally by mac80211. 2148 * 2149 * Return: The mac80211 driver hw struct of @wiphy. 2150 */ 2151 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 2152 2153 /** 2154 * SET_IEEE80211_DEV - set device for 802.11 hardware 2155 * 2156 * @hw: the &struct ieee80211_hw to set the device for 2157 * @dev: the &struct device of this 802.11 device 2158 */ 2159 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 2160 { 2161 set_wiphy_dev(hw->wiphy, dev); 2162 } 2163 2164 /** 2165 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 2166 * 2167 * @hw: the &struct ieee80211_hw to set the MAC address for 2168 * @addr: the address to set 2169 */ 2170 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 2171 { 2172 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 2173 } 2174 2175 static inline struct ieee80211_rate * 2176 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 2177 const struct ieee80211_tx_info *c) 2178 { 2179 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 2180 return NULL; 2181 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 2182 } 2183 2184 static inline struct ieee80211_rate * 2185 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 2186 const struct ieee80211_tx_info *c) 2187 { 2188 if (c->control.rts_cts_rate_idx < 0) 2189 return NULL; 2190 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 2191 } 2192 2193 static inline struct ieee80211_rate * 2194 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 2195 const struct ieee80211_tx_info *c, int idx) 2196 { 2197 if (c->control.rates[idx + 1].idx < 0) 2198 return NULL; 2199 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 2200 } 2201 2202 /** 2203 * ieee80211_free_txskb - free TX skb 2204 * @hw: the hardware 2205 * @skb: the skb 2206 * 2207 * Free a transmit skb. Use this funtion when some failure 2208 * to transmit happened and thus status cannot be reported. 2209 */ 2210 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 2211 2212 /** 2213 * DOC: Hardware crypto acceleration 2214 * 2215 * mac80211 is capable of taking advantage of many hardware 2216 * acceleration designs for encryption and decryption operations. 2217 * 2218 * The set_key() callback in the &struct ieee80211_ops for a given 2219 * device is called to enable hardware acceleration of encryption and 2220 * decryption. The callback takes a @sta parameter that will be NULL 2221 * for default keys or keys used for transmission only, or point to 2222 * the station information for the peer for individual keys. 2223 * Multiple transmission keys with the same key index may be used when 2224 * VLANs are configured for an access point. 2225 * 2226 * When transmitting, the TX control data will use the @hw_key_idx 2227 * selected by the driver by modifying the &struct ieee80211_key_conf 2228 * pointed to by the @key parameter to the set_key() function. 2229 * 2230 * The set_key() call for the %SET_KEY command should return 0 if 2231 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 2232 * added; if you return 0 then hw_key_idx must be assigned to the 2233 * hardware key index, you are free to use the full u8 range. 2234 * 2235 * Note that in the case that the @IEEE80211_HW_SW_CRYPTO_CONTROL flag is 2236 * set, mac80211 will not automatically fall back to software crypto if 2237 * enabling hardware crypto failed. The set_key() call may also return the 2238 * value 1 to permit this specific key/algorithm to be done in software. 2239 * 2240 * When the cmd is %DISABLE_KEY then it must succeed. 2241 * 2242 * Note that it is permissible to not decrypt a frame even if a key 2243 * for it has been uploaded to hardware, the stack will not make any 2244 * decision based on whether a key has been uploaded or not but rather 2245 * based on the receive flags. 2246 * 2247 * The &struct ieee80211_key_conf structure pointed to by the @key 2248 * parameter is guaranteed to be valid until another call to set_key() 2249 * removes it, but it can only be used as a cookie to differentiate 2250 * keys. 2251 * 2252 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 2253 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 2254 * handler. 2255 * The update_tkip_key() call updates the driver with the new phase 1 key. 2256 * This happens every time the iv16 wraps around (every 65536 packets). The 2257 * set_key() call will happen only once for each key (unless the AP did 2258 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 2259 * provided by update_tkip_key only. The trigger that makes mac80211 call this 2260 * handler is software decryption with wrap around of iv16. 2261 * 2262 * The set_default_unicast_key() call updates the default WEP key index 2263 * configured to the hardware for WEP encryption type. This is required 2264 * for devices that support offload of data packets (e.g. ARP responses). 2265 */ 2266 2267 /** 2268 * DOC: Powersave support 2269 * 2270 * mac80211 has support for various powersave implementations. 2271 * 2272 * First, it can support hardware that handles all powersaving by itself, 2273 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 2274 * flag. In that case, it will be told about the desired powersave mode 2275 * with the %IEEE80211_CONF_PS flag depending on the association status. 2276 * The hardware must take care of sending nullfunc frames when necessary, 2277 * i.e. when entering and leaving powersave mode. The hardware is required 2278 * to look at the AID in beacons and signal to the AP that it woke up when 2279 * it finds traffic directed to it. 2280 * 2281 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 2282 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 2283 * with hardware wakeup and sleep states. Driver is responsible for waking 2284 * up the hardware before issuing commands to the hardware and putting it 2285 * back to sleep at appropriate times. 2286 * 2287 * When PS is enabled, hardware needs to wakeup for beacons and receive the 2288 * buffered multicast/broadcast frames after the beacon. Also it must be 2289 * possible to send frames and receive the acknowledment frame. 2290 * 2291 * Other hardware designs cannot send nullfunc frames by themselves and also 2292 * need software support for parsing the TIM bitmap. This is also supported 2293 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 2294 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 2295 * required to pass up beacons. The hardware is still required to handle 2296 * waking up for multicast traffic; if it cannot the driver must handle that 2297 * as best as it can, mac80211 is too slow to do that. 2298 * 2299 * Dynamic powersave is an extension to normal powersave in which the 2300 * hardware stays awake for a user-specified period of time after sending a 2301 * frame so that reply frames need not be buffered and therefore delayed to 2302 * the next wakeup. It's compromise of getting good enough latency when 2303 * there's data traffic and still saving significantly power in idle 2304 * periods. 2305 * 2306 * Dynamic powersave is simply supported by mac80211 enabling and disabling 2307 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 2308 * flag and mac80211 will handle everything automatically. Additionally, 2309 * hardware having support for the dynamic PS feature may set the 2310 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 2311 * dynamic PS mode itself. The driver needs to look at the 2312 * @dynamic_ps_timeout hardware configuration value and use it that value 2313 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 2314 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 2315 * enabled whenever user has enabled powersave. 2316 * 2317 * Driver informs U-APSD client support by enabling 2318 * %IEEE80211_VIF_SUPPORTS_UAPSD flag. The mode is configured through the 2319 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS 2320 * Nullfunc frames and stay awake until the service period has ended. To 2321 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 2322 * from that AC are transmitted with powersave enabled. 2323 * 2324 * Note: U-APSD client mode is not yet supported with 2325 * %IEEE80211_HW_PS_NULLFUNC_STACK. 2326 */ 2327 2328 /** 2329 * DOC: Beacon filter support 2330 * 2331 * Some hardware have beacon filter support to reduce host cpu wakeups 2332 * which will reduce system power consumption. It usually works so that 2333 * the firmware creates a checksum of the beacon but omits all constantly 2334 * changing elements (TSF, TIM etc). Whenever the checksum changes the 2335 * beacon is forwarded to the host, otherwise it will be just dropped. That 2336 * way the host will only receive beacons where some relevant information 2337 * (for example ERP protection or WMM settings) have changed. 2338 * 2339 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 2340 * interface capability. The driver needs to enable beacon filter support 2341 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 2342 * power save is enabled, the stack will not check for beacon loss and the 2343 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 2344 * 2345 * The time (or number of beacons missed) until the firmware notifies the 2346 * driver of a beacon loss event (which in turn causes the driver to call 2347 * ieee80211_beacon_loss()) should be configurable and will be controlled 2348 * by mac80211 and the roaming algorithm in the future. 2349 * 2350 * Since there may be constantly changing information elements that nothing 2351 * in the software stack cares about, we will, in the future, have mac80211 2352 * tell the driver which information elements are interesting in the sense 2353 * that we want to see changes in them. This will include 2354 * - a list of information element IDs 2355 * - a list of OUIs for the vendor information element 2356 * 2357 * Ideally, the hardware would filter out any beacons without changes in the 2358 * requested elements, but if it cannot support that it may, at the expense 2359 * of some efficiency, filter out only a subset. For example, if the device 2360 * doesn't support checking for OUIs it should pass up all changes in all 2361 * vendor information elements. 2362 * 2363 * Note that change, for the sake of simplification, also includes information 2364 * elements appearing or disappearing from the beacon. 2365 * 2366 * Some hardware supports an "ignore list" instead, just make sure nothing 2367 * that was requested is on the ignore list, and include commonly changing 2368 * information element IDs in the ignore list, for example 11 (BSS load) and 2369 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 2370 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 2371 * it could also include some currently unused IDs. 2372 * 2373 * 2374 * In addition to these capabilities, hardware should support notifying the 2375 * host of changes in the beacon RSSI. This is relevant to implement roaming 2376 * when no traffic is flowing (when traffic is flowing we see the RSSI of 2377 * the received data packets). This can consist in notifying the host when 2378 * the RSSI changes significantly or when it drops below or rises above 2379 * configurable thresholds. In the future these thresholds will also be 2380 * configured by mac80211 (which gets them from userspace) to implement 2381 * them as the roaming algorithm requires. 2382 * 2383 * If the hardware cannot implement this, the driver should ask it to 2384 * periodically pass beacon frames to the host so that software can do the 2385 * signal strength threshold checking. 2386 */ 2387 2388 /** 2389 * DOC: Spatial multiplexing power save 2390 * 2391 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 2392 * power in an 802.11n implementation. For details on the mechanism 2393 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 2394 * "11.2.3 SM power save". 2395 * 2396 * The mac80211 implementation is capable of sending action frames 2397 * to update the AP about the station's SMPS mode, and will instruct 2398 * the driver to enter the specific mode. It will also announce the 2399 * requested SMPS mode during the association handshake. Hardware 2400 * support for this feature is required, and can be indicated by 2401 * hardware flags. 2402 * 2403 * The default mode will be "automatic", which nl80211/cfg80211 2404 * defines to be dynamic SMPS in (regular) powersave, and SMPS 2405 * turned off otherwise. 2406 * 2407 * To support this feature, the driver must set the appropriate 2408 * hardware support flags, and handle the SMPS flag to the config() 2409 * operation. It will then with this mechanism be instructed to 2410 * enter the requested SMPS mode while associated to an HT AP. 2411 */ 2412 2413 /** 2414 * DOC: Frame filtering 2415 * 2416 * mac80211 requires to see many management frames for proper 2417 * operation, and users may want to see many more frames when 2418 * in monitor mode. However, for best CPU usage and power consumption, 2419 * having as few frames as possible percolate through the stack is 2420 * desirable. Hence, the hardware should filter as much as possible. 2421 * 2422 * To achieve this, mac80211 uses filter flags (see below) to tell 2423 * the driver's configure_filter() function which frames should be 2424 * passed to mac80211 and which should be filtered out. 2425 * 2426 * Before configure_filter() is invoked, the prepare_multicast() 2427 * callback is invoked with the parameters @mc_count and @mc_list 2428 * for the combined multicast address list of all virtual interfaces. 2429 * It's use is optional, and it returns a u64 that is passed to 2430 * configure_filter(). Additionally, configure_filter() has the 2431 * arguments @changed_flags telling which flags were changed and 2432 * @total_flags with the new flag states. 2433 * 2434 * If your device has no multicast address filters your driver will 2435 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2436 * parameter to see whether multicast frames should be accepted 2437 * or dropped. 2438 * 2439 * All unsupported flags in @total_flags must be cleared. 2440 * Hardware does not support a flag if it is incapable of _passing_ 2441 * the frame to the stack. Otherwise the driver must ignore 2442 * the flag, but not clear it. 2443 * You must _only_ clear the flag (announce no support for the 2444 * flag to mac80211) if you are not able to pass the packet type 2445 * to the stack (so the hardware always filters it). 2446 * So for example, you should clear @FIF_CONTROL, if your hardware 2447 * always filters control frames. If your hardware always passes 2448 * control frames to the kernel and is incapable of filtering them, 2449 * you do _not_ clear the @FIF_CONTROL flag. 2450 * This rule applies to all other FIF flags as well. 2451 */ 2452 2453 /** 2454 * DOC: AP support for powersaving clients 2455 * 2456 * In order to implement AP and P2P GO modes, mac80211 has support for 2457 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2458 * There currently is no support for sAPSD. 2459 * 2460 * There is one assumption that mac80211 makes, namely that a client 2461 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2462 * Both are supported, and both can be used by the same client, but 2463 * they can't be used concurrently by the same client. This simplifies 2464 * the driver code. 2465 * 2466 * The first thing to keep in mind is that there is a flag for complete 2467 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2468 * mac80211 expects the driver to handle most of the state machine for 2469 * powersaving clients and will ignore the PM bit in incoming frames. 2470 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2471 * stations' powersave transitions. In this mode, mac80211 also doesn't 2472 * handle PS-Poll/uAPSD. 2473 * 2474 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2475 * PM bit in incoming frames for client powersave transitions. When a 2476 * station goes to sleep, we will stop transmitting to it. There is, 2477 * however, a race condition: a station might go to sleep while there is 2478 * data buffered on hardware queues. If the device has support for this 2479 * it will reject frames, and the driver should give the frames back to 2480 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2481 * cause mac80211 to retry the frame when the station wakes up. The 2482 * driver is also notified of powersave transitions by calling its 2483 * @sta_notify callback. 2484 * 2485 * When the station is asleep, it has three choices: it can wake up, 2486 * it can PS-Poll, or it can possibly start a uAPSD service period. 2487 * Waking up is implemented by simply transmitting all buffered (and 2488 * filtered) frames to the station. This is the easiest case. When 2489 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2490 * will inform the driver of this with the @allow_buffered_frames 2491 * callback; this callback is optional. mac80211 will then transmit 2492 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2493 * on each frame. The last frame in the service period (or the only 2494 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2495 * indicate that it ends the service period; as this frame must have 2496 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2497 * When TX status is reported for this frame, the service period is 2498 * marked has having ended and a new one can be started by the peer. 2499 * 2500 * Additionally, non-bufferable MMPDUs can also be transmitted by 2501 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2502 * 2503 * Another race condition can happen on some devices like iwlwifi 2504 * when there are frames queued for the station and it wakes up 2505 * or polls; the frames that are already queued could end up being 2506 * transmitted first instead, causing reordering and/or wrong 2507 * processing of the EOSP. The cause is that allowing frames to be 2508 * transmitted to a certain station is out-of-band communication to 2509 * the device. To allow this problem to be solved, the driver can 2510 * call ieee80211_sta_block_awake() if frames are buffered when it 2511 * is notified that the station went to sleep. When all these frames 2512 * have been filtered (see above), it must call the function again 2513 * to indicate that the station is no longer blocked. 2514 * 2515 * If the driver buffers frames in the driver for aggregation in any 2516 * way, it must use the ieee80211_sta_set_buffered() call when it is 2517 * notified of the station going to sleep to inform mac80211 of any 2518 * TIDs that have frames buffered. Note that when a station wakes up 2519 * this information is reset (hence the requirement to call it when 2520 * informed of the station going to sleep). Then, when a service 2521 * period starts for any reason, @release_buffered_frames is called 2522 * with the number of frames to be released and which TIDs they are 2523 * to come from. In this case, the driver is responsible for setting 2524 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2525 * to help the @more_data parameter is passed to tell the driver if 2526 * there is more data on other TIDs -- the TIDs to release frames 2527 * from are ignored since mac80211 doesn't know how many frames the 2528 * buffers for those TIDs contain. 2529 * 2530 * If the driver also implement GO mode, where absence periods may 2531 * shorten service periods (or abort PS-Poll responses), it must 2532 * filter those response frames except in the case of frames that 2533 * are buffered in the driver -- those must remain buffered to avoid 2534 * reordering. Because it is possible that no frames are released 2535 * in this case, the driver must call ieee80211_sta_eosp() 2536 * to indicate to mac80211 that the service period ended anyway. 2537 * 2538 * Finally, if frames from multiple TIDs are released from mac80211 2539 * but the driver might reorder them, it must clear & set the flags 2540 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2541 * and also take care of the EOSP and MORE_DATA bits in the frame. 2542 * The driver may also use ieee80211_sta_eosp() in this case. 2543 * 2544 * Note that if the driver ever buffers frames other than QoS-data 2545 * frames, it must take care to never send a non-QoS-data frame as 2546 * the last frame in a service period, adding a QoS-nulldata frame 2547 * after a non-QoS-data frame if needed. 2548 */ 2549 2550 /** 2551 * DOC: HW queue control 2552 * 2553 * Before HW queue control was introduced, mac80211 only had a single static 2554 * assignment of per-interface AC software queues to hardware queues. This 2555 * was problematic for a few reasons: 2556 * 1) off-channel transmissions might get stuck behind other frames 2557 * 2) multiple virtual interfaces couldn't be handled correctly 2558 * 3) after-DTIM frames could get stuck behind other frames 2559 * 2560 * To solve this, hardware typically uses multiple different queues for all 2561 * the different usages, and this needs to be propagated into mac80211 so it 2562 * won't have the same problem with the software queues. 2563 * 2564 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2565 * flag that tells it that the driver implements its own queue control. To do 2566 * so, the driver will set up the various queues in each &struct ieee80211_vif 2567 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2568 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2569 * if necessary will queue the frame on the right software queue that mirrors 2570 * the hardware queue. 2571 * Additionally, the driver has to then use these HW queue IDs for the queue 2572 * management functions (ieee80211_stop_queue() et al.) 2573 * 2574 * The driver is free to set up the queue mappings as needed, multiple virtual 2575 * interfaces may map to the same hardware queues if needed. The setup has to 2576 * happen during add_interface or change_interface callbacks. For example, a 2577 * driver supporting station+station and station+AP modes might decide to have 2578 * 10 hardware queues to handle different scenarios: 2579 * 2580 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2581 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2582 * after-DTIM queue for AP: 8 2583 * off-channel queue: 9 2584 * 2585 * It would then set up the hardware like this: 2586 * hw.offchannel_tx_hw_queue = 9 2587 * 2588 * and the first virtual interface that is added as follows: 2589 * vif.hw_queue[IEEE80211_AC_VO] = 0 2590 * vif.hw_queue[IEEE80211_AC_VI] = 1 2591 * vif.hw_queue[IEEE80211_AC_BE] = 2 2592 * vif.hw_queue[IEEE80211_AC_BK] = 3 2593 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2594 * and the second virtual interface with 4-7. 2595 * 2596 * If queue 6 gets full, for example, mac80211 would only stop the second 2597 * virtual interface's BE queue since virtual interface queues are per AC. 2598 * 2599 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2600 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2601 * queue could potentially be shared since mac80211 will look at cab_queue when 2602 * a queue is stopped/woken even if the interface is not in AP mode. 2603 */ 2604 2605 /** 2606 * enum ieee80211_filter_flags - hardware filter flags 2607 * 2608 * These flags determine what the filter in hardware should be 2609 * programmed to let through and what should not be passed to the 2610 * stack. It is always safe to pass more frames than requested, 2611 * but this has negative impact on power consumption. 2612 * 2613 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2614 * by the user or if the hardware is not capable of filtering by 2615 * multicast address. 2616 * 2617 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2618 * %RX_FLAG_FAILED_FCS_CRC for them) 2619 * 2620 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2621 * the %RX_FLAG_FAILED_PLCP_CRC for them 2622 * 2623 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2624 * to the hardware that it should not filter beacons or probe responses 2625 * by BSSID. Filtering them can greatly reduce the amount of processing 2626 * mac80211 needs to do and the amount of CPU wakeups, so you should 2627 * honour this flag if possible. 2628 * 2629 * @FIF_CONTROL: pass control frames (except for PS Poll) addressed to this 2630 * station 2631 * 2632 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2633 * 2634 * @FIF_PSPOLL: pass PS Poll frames 2635 * 2636 * @FIF_PROBE_REQ: pass probe request frames 2637 */ 2638 enum ieee80211_filter_flags { 2639 FIF_ALLMULTI = 1<<1, 2640 FIF_FCSFAIL = 1<<2, 2641 FIF_PLCPFAIL = 1<<3, 2642 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2643 FIF_CONTROL = 1<<5, 2644 FIF_OTHER_BSS = 1<<6, 2645 FIF_PSPOLL = 1<<7, 2646 FIF_PROBE_REQ = 1<<8, 2647 }; 2648 2649 /** 2650 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2651 * 2652 * These flags are used with the ampdu_action() callback in 2653 * &struct ieee80211_ops to indicate which action is needed. 2654 * 2655 * Note that drivers MUST be able to deal with a TX aggregation 2656 * session being stopped even before they OK'ed starting it by 2657 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2658 * might receive the addBA frame and send a delBA right away! 2659 * 2660 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2661 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2662 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2663 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2664 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2665 * queued packets, now unaggregated. After all packets are transmitted the 2666 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2667 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2668 * called when the station is removed. There's no need or reason to call 2669 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2670 * session is gone and removes the station. 2671 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2672 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2673 * now the connection is dropped and the station will be removed. Drivers 2674 * should clean up and drop remaining packets when this is called. 2675 */ 2676 enum ieee80211_ampdu_mlme_action { 2677 IEEE80211_AMPDU_RX_START, 2678 IEEE80211_AMPDU_RX_STOP, 2679 IEEE80211_AMPDU_TX_START, 2680 IEEE80211_AMPDU_TX_STOP_CONT, 2681 IEEE80211_AMPDU_TX_STOP_FLUSH, 2682 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2683 IEEE80211_AMPDU_TX_OPERATIONAL, 2684 }; 2685 2686 /** 2687 * enum ieee80211_frame_release_type - frame release reason 2688 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2689 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2690 * frame received on trigger-enabled AC 2691 */ 2692 enum ieee80211_frame_release_type { 2693 IEEE80211_FRAME_RELEASE_PSPOLL, 2694 IEEE80211_FRAME_RELEASE_UAPSD, 2695 }; 2696 2697 /** 2698 * enum ieee80211_rate_control_changed - flags to indicate what changed 2699 * 2700 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2701 * to this station changed. The actual bandwidth is in the station 2702 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2703 * flag changes, for HT and VHT the bandwidth field changes. 2704 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2705 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2706 * changed (in IBSS mode) due to discovering more information about 2707 * the peer. 2708 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2709 * by the peer 2710 */ 2711 enum ieee80211_rate_control_changed { 2712 IEEE80211_RC_BW_CHANGED = BIT(0), 2713 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2714 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2715 IEEE80211_RC_NSS_CHANGED = BIT(3), 2716 }; 2717 2718 /** 2719 * enum ieee80211_roc_type - remain on channel type 2720 * 2721 * With the support for multi channel contexts and multi channel operations, 2722 * remain on channel operations might be limited/deferred/aborted by other 2723 * flows/operations which have higher priority (and vise versa). 2724 * Specifying the ROC type can be used by devices to prioritize the ROC 2725 * operations compared to other operations/flows. 2726 * 2727 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2728 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2729 * for sending managment frames offchannel. 2730 */ 2731 enum ieee80211_roc_type { 2732 IEEE80211_ROC_TYPE_NORMAL = 0, 2733 IEEE80211_ROC_TYPE_MGMT_TX, 2734 }; 2735 2736 /** 2737 * enum ieee80211_reconfig_complete_type - reconfig type 2738 * 2739 * This enum is used by the reconfig_complete() callback to indicate what 2740 * reconfiguration type was completed. 2741 * 2742 * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type 2743 * (also due to resume() callback returning 1) 2744 * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless 2745 * of wowlan configuration) 2746 */ 2747 enum ieee80211_reconfig_type { 2748 IEEE80211_RECONFIG_TYPE_RESTART, 2749 IEEE80211_RECONFIG_TYPE_SUSPEND, 2750 }; 2751 2752 /** 2753 * struct ieee80211_ops - callbacks from mac80211 to the driver 2754 * 2755 * This structure contains various callbacks that the driver may 2756 * handle or, in some cases, must handle, for example to configure 2757 * the hardware to a new channel or to transmit a frame. 2758 * 2759 * @tx: Handler that 802.11 module calls for each transmitted frame. 2760 * skb contains the buffer starting from the IEEE 802.11 header. 2761 * The low-level driver should send the frame out based on 2762 * configuration in the TX control data. This handler should, 2763 * preferably, never fail and stop queues appropriately. 2764 * Must be atomic. 2765 * 2766 * @start: Called before the first netdevice attached to the hardware 2767 * is enabled. This should turn on the hardware and must turn on 2768 * frame reception (for possibly enabled monitor interfaces.) 2769 * Returns negative error codes, these may be seen in userspace, 2770 * or zero. 2771 * When the device is started it should not have a MAC address 2772 * to avoid acknowledging frames before a non-monitor device 2773 * is added. 2774 * Must be implemented and can sleep. 2775 * 2776 * @stop: Called after last netdevice attached to the hardware 2777 * is disabled. This should turn off the hardware (at least 2778 * it must turn off frame reception.) 2779 * May be called right after add_interface if that rejects 2780 * an interface. If you added any work onto the mac80211 workqueue 2781 * you should ensure to cancel it on this callback. 2782 * Must be implemented and can sleep. 2783 * 2784 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2785 * stop transmitting and doing any other configuration, and then 2786 * ask the device to suspend. This is only invoked when WoWLAN is 2787 * configured, otherwise the device is deconfigured completely and 2788 * reconfigured at resume time. 2789 * The driver may also impose special conditions under which it 2790 * wants to use the "normal" suspend (deconfigure), say if it only 2791 * supports WoWLAN when the device is associated. In this case, it 2792 * must return 1 from this function. 2793 * 2794 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2795 * now resuming its operation, after this the device must be fully 2796 * functional again. If this returns an error, the only way out is 2797 * to also unregister the device. If it returns 1, then mac80211 2798 * will also go through the regular complete restart on resume. 2799 * 2800 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2801 * modified. The reason is that device_set_wakeup_enable() is 2802 * supposed to be called when the configuration changes, not only 2803 * in suspend(). 2804 * 2805 * @add_interface: Called when a netdevice attached to the hardware is 2806 * enabled. Because it is not called for monitor mode devices, @start 2807 * and @stop must be implemented. 2808 * The driver should perform any initialization it needs before 2809 * the device can be enabled. The initial configuration for the 2810 * interface is given in the conf parameter. 2811 * The callback may refuse to add an interface by returning a 2812 * negative error code (which will be seen in userspace.) 2813 * Must be implemented and can sleep. 2814 * 2815 * @change_interface: Called when a netdevice changes type. This callback 2816 * is optional, but only if it is supported can interface types be 2817 * switched while the interface is UP. The callback may sleep. 2818 * Note that while an interface is being switched, it will not be 2819 * found by the interface iteration callbacks. 2820 * 2821 * @remove_interface: Notifies a driver that an interface is going down. 2822 * The @stop callback is called after this if it is the last interface 2823 * and no monitor interfaces are present. 2824 * When all interfaces are removed, the MAC address in the hardware 2825 * must be cleared so the device no longer acknowledges packets, 2826 * the mac_addr member of the conf structure is, however, set to the 2827 * MAC address of the device going away. 2828 * Hence, this callback must be implemented. It can sleep. 2829 * 2830 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2831 * function to change hardware configuration, e.g., channel. 2832 * This function should never fail but returns a negative error code 2833 * if it does. The callback can sleep. 2834 * 2835 * @bss_info_changed: Handler for configuration requests related to BSS 2836 * parameters that may vary during BSS's lifespan, and may affect low 2837 * level driver (e.g. assoc/disassoc status, erp parameters). 2838 * This function should not be used if no BSS has been set, unless 2839 * for association indication. The @changed parameter indicates which 2840 * of the bss parameters has changed when a call is made. The callback 2841 * can sleep. 2842 * 2843 * @prepare_multicast: Prepare for multicast filter configuration. 2844 * This callback is optional, and its return value is passed 2845 * to configure_filter(). This callback must be atomic. 2846 * 2847 * @configure_filter: Configure the device's RX filter. 2848 * See the section "Frame filtering" for more information. 2849 * This callback must be implemented and can sleep. 2850 * 2851 * @config_iface_filter: Configure the interface's RX filter. 2852 * This callback is optional and is used to configure which frames 2853 * should be passed to mac80211. The filter_flags is the combination 2854 * of FIF_* flags. The changed_flags is a bit mask that indicates 2855 * which flags are changed. 2856 * This callback can sleep. 2857 * 2858 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2859 * must be set or cleared for a given STA. Must be atomic. 2860 * 2861 * @set_key: See the section "Hardware crypto acceleration" 2862 * This callback is only called between add_interface and 2863 * remove_interface calls, i.e. while the given virtual interface 2864 * is enabled. 2865 * Returns a negative error code if the key can't be added. 2866 * The callback can sleep. 2867 * 2868 * @update_tkip_key: See the section "Hardware crypto acceleration" 2869 * This callback will be called in the context of Rx. Called for drivers 2870 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2871 * The callback must be atomic. 2872 * 2873 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2874 * host is suspended, it can assign this callback to retrieve the data 2875 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2876 * After rekeying was done it should (for example during resume) notify 2877 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2878 * 2879 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2880 * WEP when the device sends data packets autonomously, e.g. for ARP 2881 * offloading. The index can be 0-3, or -1 for unsetting it. 2882 * 2883 * @hw_scan: Ask the hardware to service the scan request, no need to start 2884 * the scan state machine in stack. The scan must honour the channel 2885 * configuration done by the regulatory agent in the wiphy's 2886 * registered bands. The hardware (or the driver) needs to make sure 2887 * that power save is disabled. 2888 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2889 * entire IEs after the SSID, so that drivers need not look at these 2890 * at all but just send them after the SSID -- mac80211 includes the 2891 * (extended) supported rates and HT information (where applicable). 2892 * When the scan finishes, ieee80211_scan_completed() must be called; 2893 * note that it also must be called when the scan cannot finish due to 2894 * any error unless this callback returned a negative error code. 2895 * The callback can sleep. 2896 * 2897 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2898 * The driver should ask the hardware to cancel the scan (if possible), 2899 * but the scan will be completed only after the driver will call 2900 * ieee80211_scan_completed(). 2901 * This callback is needed for wowlan, to prevent enqueueing a new 2902 * scan_work after the low-level driver was already suspended. 2903 * The callback can sleep. 2904 * 2905 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2906 * specific intervals. The driver must call the 2907 * ieee80211_sched_scan_results() function whenever it finds results. 2908 * This process will continue until sched_scan_stop is called. 2909 * 2910 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2911 * In this case, ieee80211_sched_scan_stopped() must not be called. 2912 * 2913 * @sw_scan_start: Notifier function that is called just before a software scan 2914 * is started. Can be NULL, if the driver doesn't need this notification. 2915 * The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR, 2916 * the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it 2917 * can use this parameter. The callback can sleep. 2918 * 2919 * @sw_scan_complete: Notifier function that is called just after a 2920 * software scan finished. Can be NULL, if the driver doesn't need 2921 * this notification. 2922 * The callback can sleep. 2923 * 2924 * @get_stats: Return low-level statistics. 2925 * Returns zero if statistics are available. 2926 * The callback can sleep. 2927 * 2928 * @get_key_seq: If your device implements encryption in hardware and does 2929 * IV/PN assignment then this callback should be provided to read the 2930 * IV/PN for the given key from hardware. 2931 * The callback must be atomic. 2932 * 2933 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2934 * if the device does fragmentation by itself; if this callback is 2935 * implemented then the stack will not do fragmentation. 2936 * The callback can sleep. 2937 * 2938 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2939 * The callback can sleep. 2940 * 2941 * @sta_add: Notifies low level driver about addition of an associated station, 2942 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2943 * 2944 * @sta_remove: Notifies low level driver about removal of an associated 2945 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 2946 * returns it isn't safe to use the pointer, not even RCU protected; 2947 * no RCU grace period is guaranteed between returning here and freeing 2948 * the station. See @sta_pre_rcu_remove if needed. 2949 * This callback can sleep. 2950 * 2951 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2952 * when a station is added to mac80211's station list. This callback 2953 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2954 * conditional. This callback can sleep. 2955 * 2956 * @sta_remove_debugfs: Remove the debugfs files which were added using 2957 * @sta_add_debugfs. This callback can sleep. 2958 * 2959 * @sta_notify: Notifies low level driver about power state transition of an 2960 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2961 * in AP mode, this callback will not be called when the flag 2962 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2963 * 2964 * @sta_state: Notifies low level driver about state transition of a 2965 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2966 * This callback is mutually exclusive with @sta_add/@sta_remove. 2967 * It must not fail for down transitions but may fail for transitions 2968 * up the list of states. Also note that after the callback returns it 2969 * isn't safe to use the pointer, not even RCU protected - no RCU grace 2970 * period is guaranteed between returning here and freeing the station. 2971 * See @sta_pre_rcu_remove if needed. 2972 * The callback can sleep. 2973 * 2974 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 2975 * synchronisation. This is useful if a driver needs to have station 2976 * pointers protected using RCU, it can then use this call to clear 2977 * the pointers instead of waiting for an RCU grace period to elapse 2978 * in @sta_state. 2979 * The callback can sleep. 2980 * 2981 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2982 * used to transmit to the station. The changes are advertised with bits 2983 * from &enum ieee80211_rate_control_changed and the values are reflected 2984 * in the station data. This callback should only be used when the driver 2985 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2986 * otherwise the rate control algorithm is notified directly. 2987 * Must be atomic. 2988 * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This 2989 * is only used if the configured rate control algorithm actually uses 2990 * the new rate table API, and is therefore optional. Must be atomic. 2991 * 2992 * @sta_statistics: Get statistics for this station. For example with beacon 2993 * filtering, the statistics kept by mac80211 might not be accurate, so 2994 * let the driver pre-fill the statistics. The driver can fill most of 2995 * the values (indicating which by setting the filled bitmap), but not 2996 * all of them make sense - see the source for which ones are possible. 2997 * Statistics that the driver doesn't fill will be filled by mac80211. 2998 * The callback can sleep. 2999 * 3000 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 3001 * bursting) for a hardware TX queue. 3002 * Returns a negative error code on failure. 3003 * The callback can sleep. 3004 * 3005 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 3006 * this is only used for IBSS mode BSSID merging and debugging. Is not a 3007 * required function. 3008 * The callback can sleep. 3009 * 3010 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 3011 * Currently, this is only used for IBSS mode debugging. Is not a 3012 * required function. 3013 * The callback can sleep. 3014 * 3015 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 3016 * with other STAs in the IBSS. This is only used in IBSS mode. This 3017 * function is optional if the firmware/hardware takes full care of 3018 * TSF synchronization. 3019 * The callback can sleep. 3020 * 3021 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 3022 * This is needed only for IBSS mode and the result of this function is 3023 * used to determine whether to reply to Probe Requests. 3024 * Returns non-zero if this device sent the last beacon. 3025 * The callback can sleep. 3026 * 3027 * @ampdu_action: Perform a certain A-MPDU action 3028 * The RA/TID combination determines the destination and TID we want 3029 * the ampdu action to be performed for. The action is defined through 3030 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 3031 * is the first frame we expect to perform the action on. Notice 3032 * that TX/RX_STOP can pass NULL for this parameter. 3033 * The @buf_size parameter is only valid when the action is set to 3034 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 3035 * buffer size (number of subframes) for this session -- the driver 3036 * may neither send aggregates containing more subframes than this 3037 * nor send aggregates in a way that lost frames would exceed the 3038 * buffer size. If just limiting the aggregate size, this would be 3039 * possible with a buf_size of 8: 3040 * - TX: 1.....7 3041 * - RX: 2....7 (lost frame #1) 3042 * - TX: 8..1... 3043 * which is invalid since #1 was now re-transmitted well past the 3044 * buffer size of 8. Correct ways to retransmit #1 would be: 3045 * - TX: 1 or 18 or 81 3046 * Even "189" would be wrong since 1 could be lost again. 3047 * The @amsdu parameter is valid when the action is set to 3048 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's ability 3049 * to receive A-MSDU within A-MPDU. 3050 * 3051 * Returns a negative error code on failure. 3052 * The callback can sleep. 3053 * 3054 * @get_survey: Return per-channel survey information 3055 * 3056 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 3057 * need to set wiphy->rfkill_poll to %true before registration, 3058 * and need to call wiphy_rfkill_set_hw_state() in the callback. 3059 * The callback can sleep. 3060 * 3061 * @set_coverage_class: Set slot time for given coverage class as specified 3062 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 3063 * accordingly; coverage class equals to -1 to enable ACK timeout 3064 * estimation algorithm (dynack). To disable dynack set valid value for 3065 * coverage class. This callback is not required and may sleep. 3066 * 3067 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 3068 * be %NULL. The callback can sleep. 3069 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 3070 * 3071 * @flush: Flush all pending frames from the hardware queue, making sure 3072 * that the hardware queues are empty. The @queues parameter is a bitmap 3073 * of queues to flush, which is useful if different virtual interfaces 3074 * use different hardware queues; it may also indicate all queues. 3075 * If the parameter @drop is set to %true, pending frames may be dropped. 3076 * Note that vif can be NULL. 3077 * The callback can sleep. 3078 * 3079 * @channel_switch: Drivers that need (or want) to offload the channel 3080 * switch operation for CSAs received from the AP may implement this 3081 * callback. They must then call ieee80211_chswitch_done() to indicate 3082 * completion of the channel switch. 3083 * 3084 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 3085 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 3086 * reject TX/RX mask combinations they cannot support by returning -EINVAL 3087 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 3088 * 3089 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 3090 * 3091 * @remain_on_channel: Starts an off-channel period on the given channel, must 3092 * call back to ieee80211_ready_on_channel() when on that channel. Note 3093 * that normal channel traffic is not stopped as this is intended for hw 3094 * offload. Frames to transmit on the off-channel channel are transmitted 3095 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 3096 * duration (which will always be non-zero) expires, the driver must call 3097 * ieee80211_remain_on_channel_expired(). 3098 * Note that this callback may be called while the device is in IDLE and 3099 * must be accepted in this case. 3100 * This callback may sleep. 3101 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 3102 * aborted before it expires. This callback may sleep. 3103 * 3104 * @set_ringparam: Set tx and rx ring sizes. 3105 * 3106 * @get_ringparam: Get tx and rx ring current and maximum sizes. 3107 * 3108 * @tx_frames_pending: Check if there is any pending frame in the hardware 3109 * queues before entering power save. 3110 * 3111 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 3112 * when transmitting a frame. Currently only legacy rates are handled. 3113 * The callback can sleep. 3114 * @event_callback: Notify driver about any event in mac80211. See 3115 * &enum ieee80211_event_type for the different types. 3116 * The callback must be atomic. 3117 * 3118 * @release_buffered_frames: Release buffered frames according to the given 3119 * parameters. In the case where the driver buffers some frames for 3120 * sleeping stations mac80211 will use this callback to tell the driver 3121 * to release some frames, either for PS-poll or uAPSD. 3122 * Note that if the @more_data parameter is %false the driver must check 3123 * if there are more frames on the given TIDs, and if there are more than 3124 * the frames being released then it must still set the more-data bit in 3125 * the frame. If the @more_data parameter is %true, then of course the 3126 * more-data bit must always be set. 3127 * The @tids parameter tells the driver which TIDs to release frames 3128 * from, for PS-poll it will always have only a single bit set. 3129 * In the case this is used for a PS-poll initiated release, the 3130 * @num_frames parameter will always be 1 so code can be shared. In 3131 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 3132 * on the TX status (and must report TX status) so that the PS-poll 3133 * period is properly ended. This is used to avoid sending multiple 3134 * responses for a retried PS-poll frame. 3135 * In the case this is used for uAPSD, the @num_frames parameter may be 3136 * bigger than one, but the driver may send fewer frames (it must send 3137 * at least one, however). In this case it is also responsible for 3138 * setting the EOSP flag in the QoS header of the frames. Also, when the 3139 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 3140 * on the last frame in the SP. Alternatively, it may call the function 3141 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 3142 * This callback must be atomic. 3143 * @allow_buffered_frames: Prepare device to allow the given number of frames 3144 * to go out to the given station. The frames will be sent by mac80211 3145 * via the usual TX path after this call. The TX information for frames 3146 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 3147 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 3148 * frames from multiple TIDs are released and the driver might reorder 3149 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 3150 * on the last frame and clear it on all others and also handle the EOSP 3151 * bit in the QoS header correctly. Alternatively, it can also call the 3152 * ieee80211_sta_eosp() function. 3153 * The @tids parameter is a bitmap and tells the driver which TIDs the 3154 * frames will be on; it will at most have two bits set. 3155 * This callback must be atomic. 3156 * 3157 * @get_et_sset_count: Ethtool API to get string-set count. 3158 * 3159 * @get_et_stats: Ethtool API to get a set of u64 stats. 3160 * 3161 * @get_et_strings: Ethtool API to get a set of strings to describe stats 3162 * and perhaps other supported types of ethtool data-sets. 3163 * 3164 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 3165 * before associated. In multi-channel scenarios, a virtual interface is 3166 * bound to a channel before it is associated, but as it isn't associated 3167 * yet it need not necessarily be given airtime, in particular since any 3168 * transmission to a P2P GO needs to be synchronized against the GO's 3169 * powersave state. mac80211 will call this function before transmitting a 3170 * management frame prior to having successfully associated to allow the 3171 * driver to give it channel time for the transmission, to get a response 3172 * and to be able to synchronize with the GO. 3173 * The callback will be called before each transmission and upon return 3174 * mac80211 will transmit the frame right away. 3175 * The callback is optional and can (should!) sleep. 3176 * 3177 * @mgd_protect_tdls_discover: Protect a TDLS discovery session. After sending 3178 * a TDLS discovery-request, we expect a reply to arrive on the AP's 3179 * channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS 3180 * setup-response is a direct packet not buffered by the AP. 3181 * mac80211 will call this function just before the transmission of a TDLS 3182 * discovery-request. The recommended period of protection is at least 3183 * 2 * (DTIM period). 3184 * The callback is optional and can sleep. 3185 * 3186 * @add_chanctx: Notifies device driver about new channel context creation. 3187 * This callback may sleep. 3188 * @remove_chanctx: Notifies device driver about channel context destruction. 3189 * This callback may sleep. 3190 * @change_chanctx: Notifies device driver about channel context changes that 3191 * may happen when combining different virtual interfaces on the same 3192 * channel context with different settings 3193 * This callback may sleep. 3194 * @assign_vif_chanctx: Notifies device driver about channel context being bound 3195 * to vif. Possible use is for hw queue remapping. 3196 * This callback may sleep. 3197 * @unassign_vif_chanctx: Notifies device driver about channel context being 3198 * unbound from vif. 3199 * This callback may sleep. 3200 * @switch_vif_chanctx: switch a number of vifs from one chanctx to 3201 * another, as specified in the list of 3202 * @ieee80211_vif_chanctx_switch passed to the driver, according 3203 * to the mode defined in &ieee80211_chanctx_switch_mode. 3204 * This callback may sleep. 3205 * 3206 * @start_ap: Start operation on the AP interface, this is called after all the 3207 * information in bss_conf is set and beacon can be retrieved. A channel 3208 * context is bound before this is called. Note that if the driver uses 3209 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 3210 * just "paused" for scanning/ROC, which is indicated by the beacon being 3211 * disabled/enabled via @bss_info_changed. 3212 * @stop_ap: Stop operation on the AP interface. 3213 * 3214 * @reconfig_complete: Called after a call to ieee80211_restart_hw() and 3215 * during resume, when the reconfiguration has completed. 3216 * This can help the driver implement the reconfiguration step (and 3217 * indicate mac80211 is ready to receive frames). 3218 * This callback may sleep. 3219 * 3220 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 3221 * Currently, this is only called for managed or P2P client interfaces. 3222 * This callback is optional; it must not sleep. 3223 * 3224 * @channel_switch_beacon: Starts a channel switch to a new channel. 3225 * Beacons are modified to include CSA or ECSA IEs before calling this 3226 * function. The corresponding count fields in these IEs must be 3227 * decremented, and when they reach 1 the driver must call 3228 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 3229 * get the csa counter decremented by mac80211, but must check if it is 3230 * 1 using ieee80211_csa_is_complete() after the beacon has been 3231 * transmitted and then call ieee80211_csa_finish(). 3232 * If the CSA count starts as zero or 1, this function will not be called, 3233 * since there won't be any time to beacon before the switch anyway. 3234 * @pre_channel_switch: This is an optional callback that is called 3235 * before a channel switch procedure is started (ie. when a STA 3236 * gets a CSA or an userspace initiated channel-switch), allowing 3237 * the driver to prepare for the channel switch. 3238 * @post_channel_switch: This is an optional callback that is called 3239 * after a channel switch procedure is completed, allowing the 3240 * driver to go back to a normal configuration. 3241 * 3242 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 3243 * information in bss_conf is set up and the beacon can be retrieved. A 3244 * channel context is bound before this is called. 3245 * @leave_ibss: Leave the IBSS again. 3246 * 3247 * @get_expected_throughput: extract the expected throughput towards the 3248 * specified station. The returned value is expressed in Kbps. It returns 0 3249 * if the RC algorithm does not have proper data to provide. 3250 * 3251 * @get_txpower: get current maximum tx power (in dBm) based on configuration 3252 * and hardware limits. 3253 * 3254 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver 3255 * is responsible for continually initiating channel-switching operations 3256 * and returning to the base channel for communication with the AP. The 3257 * driver receives a channel-switch request template and the location of 3258 * the switch-timing IE within the template as part of the invocation. 3259 * The template is valid only within the call, and the driver can 3260 * optionally copy the skb for further re-use. 3261 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both 3262 * peers must be on the base channel when the call completes. 3263 * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or 3264 * response) has been received from a remote peer. The driver gets 3265 * parameters parsed from the incoming frame and may use them to continue 3266 * an ongoing channel-switch operation. In addition, a channel-switch 3267 * response template is provided, together with the location of the 3268 * switch-timing IE within the template. The skb can only be used within 3269 * the function call. 3270 * 3271 * @wake_tx_queue: Called when new packets have been added to the queue. 3272 */ 3273 struct ieee80211_ops { 3274 void (*tx)(struct ieee80211_hw *hw, 3275 struct ieee80211_tx_control *control, 3276 struct sk_buff *skb); 3277 int (*start)(struct ieee80211_hw *hw); 3278 void (*stop)(struct ieee80211_hw *hw); 3279 #ifdef CONFIG_PM 3280 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 3281 int (*resume)(struct ieee80211_hw *hw); 3282 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 3283 #endif 3284 int (*add_interface)(struct ieee80211_hw *hw, 3285 struct ieee80211_vif *vif); 3286 int (*change_interface)(struct ieee80211_hw *hw, 3287 struct ieee80211_vif *vif, 3288 enum nl80211_iftype new_type, bool p2p); 3289 void (*remove_interface)(struct ieee80211_hw *hw, 3290 struct ieee80211_vif *vif); 3291 int (*config)(struct ieee80211_hw *hw, u32 changed); 3292 void (*bss_info_changed)(struct ieee80211_hw *hw, 3293 struct ieee80211_vif *vif, 3294 struct ieee80211_bss_conf *info, 3295 u32 changed); 3296 3297 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3298 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3299 3300 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 3301 struct netdev_hw_addr_list *mc_list); 3302 void (*configure_filter)(struct ieee80211_hw *hw, 3303 unsigned int changed_flags, 3304 unsigned int *total_flags, 3305 u64 multicast); 3306 void (*config_iface_filter)(struct ieee80211_hw *hw, 3307 struct ieee80211_vif *vif, 3308 unsigned int filter_flags, 3309 unsigned int changed_flags); 3310 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3311 bool set); 3312 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 3313 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 3314 struct ieee80211_key_conf *key); 3315 void (*update_tkip_key)(struct ieee80211_hw *hw, 3316 struct ieee80211_vif *vif, 3317 struct ieee80211_key_conf *conf, 3318 struct ieee80211_sta *sta, 3319 u32 iv32, u16 *phase1key); 3320 void (*set_rekey_data)(struct ieee80211_hw *hw, 3321 struct ieee80211_vif *vif, 3322 struct cfg80211_gtk_rekey_data *data); 3323 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 3324 struct ieee80211_vif *vif, int idx); 3325 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3326 struct ieee80211_scan_request *req); 3327 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 3328 struct ieee80211_vif *vif); 3329 int (*sched_scan_start)(struct ieee80211_hw *hw, 3330 struct ieee80211_vif *vif, 3331 struct cfg80211_sched_scan_request *req, 3332 struct ieee80211_scan_ies *ies); 3333 int (*sched_scan_stop)(struct ieee80211_hw *hw, 3334 struct ieee80211_vif *vif); 3335 void (*sw_scan_start)(struct ieee80211_hw *hw, 3336 struct ieee80211_vif *vif, 3337 const u8 *mac_addr); 3338 void (*sw_scan_complete)(struct ieee80211_hw *hw, 3339 struct ieee80211_vif *vif); 3340 int (*get_stats)(struct ieee80211_hw *hw, 3341 struct ieee80211_low_level_stats *stats); 3342 void (*get_key_seq)(struct ieee80211_hw *hw, 3343 struct ieee80211_key_conf *key, 3344 struct ieee80211_key_seq *seq); 3345 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 3346 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 3347 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3348 struct ieee80211_sta *sta); 3349 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3350 struct ieee80211_sta *sta); 3351 #ifdef CONFIG_MAC80211_DEBUGFS 3352 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 3353 struct ieee80211_vif *vif, 3354 struct ieee80211_sta *sta, 3355 struct dentry *dir); 3356 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 3357 struct ieee80211_vif *vif, 3358 struct ieee80211_sta *sta, 3359 struct dentry *dir); 3360 #endif 3361 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3362 enum sta_notify_cmd, struct ieee80211_sta *sta); 3363 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3364 struct ieee80211_sta *sta, 3365 enum ieee80211_sta_state old_state, 3366 enum ieee80211_sta_state new_state); 3367 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 3368 struct ieee80211_vif *vif, 3369 struct ieee80211_sta *sta); 3370 void (*sta_rc_update)(struct ieee80211_hw *hw, 3371 struct ieee80211_vif *vif, 3372 struct ieee80211_sta *sta, 3373 u32 changed); 3374 void (*sta_rate_tbl_update)(struct ieee80211_hw *hw, 3375 struct ieee80211_vif *vif, 3376 struct ieee80211_sta *sta); 3377 void (*sta_statistics)(struct ieee80211_hw *hw, 3378 struct ieee80211_vif *vif, 3379 struct ieee80211_sta *sta, 3380 struct station_info *sinfo); 3381 int (*conf_tx)(struct ieee80211_hw *hw, 3382 struct ieee80211_vif *vif, u16 ac, 3383 const struct ieee80211_tx_queue_params *params); 3384 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3385 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3386 u64 tsf); 3387 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3388 int (*tx_last_beacon)(struct ieee80211_hw *hw); 3389 int (*ampdu_action)(struct ieee80211_hw *hw, 3390 struct ieee80211_vif *vif, 3391 enum ieee80211_ampdu_mlme_action action, 3392 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 3393 u8 buf_size, bool amsdu); 3394 int (*get_survey)(struct ieee80211_hw *hw, int idx, 3395 struct survey_info *survey); 3396 void (*rfkill_poll)(struct ieee80211_hw *hw); 3397 void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class); 3398 #ifdef CONFIG_NL80211_TESTMODE 3399 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3400 void *data, int len); 3401 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 3402 struct netlink_callback *cb, 3403 void *data, int len); 3404 #endif 3405 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3406 u32 queues, bool drop); 3407 void (*channel_switch)(struct ieee80211_hw *hw, 3408 struct ieee80211_vif *vif, 3409 struct ieee80211_channel_switch *ch_switch); 3410 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 3411 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 3412 3413 int (*remain_on_channel)(struct ieee80211_hw *hw, 3414 struct ieee80211_vif *vif, 3415 struct ieee80211_channel *chan, 3416 int duration, 3417 enum ieee80211_roc_type type); 3418 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 3419 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 3420 void (*get_ringparam)(struct ieee80211_hw *hw, 3421 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 3422 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 3423 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3424 const struct cfg80211_bitrate_mask *mask); 3425 void (*event_callback)(struct ieee80211_hw *hw, 3426 struct ieee80211_vif *vif, 3427 const struct ieee80211_event *event); 3428 3429 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 3430 struct ieee80211_sta *sta, 3431 u16 tids, int num_frames, 3432 enum ieee80211_frame_release_type reason, 3433 bool more_data); 3434 void (*release_buffered_frames)(struct ieee80211_hw *hw, 3435 struct ieee80211_sta *sta, 3436 u16 tids, int num_frames, 3437 enum ieee80211_frame_release_type reason, 3438 bool more_data); 3439 3440 int (*get_et_sset_count)(struct ieee80211_hw *hw, 3441 struct ieee80211_vif *vif, int sset); 3442 void (*get_et_stats)(struct ieee80211_hw *hw, 3443 struct ieee80211_vif *vif, 3444 struct ethtool_stats *stats, u64 *data); 3445 void (*get_et_strings)(struct ieee80211_hw *hw, 3446 struct ieee80211_vif *vif, 3447 u32 sset, u8 *data); 3448 3449 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 3450 struct ieee80211_vif *vif); 3451 3452 void (*mgd_protect_tdls_discover)(struct ieee80211_hw *hw, 3453 struct ieee80211_vif *vif); 3454 3455 int (*add_chanctx)(struct ieee80211_hw *hw, 3456 struct ieee80211_chanctx_conf *ctx); 3457 void (*remove_chanctx)(struct ieee80211_hw *hw, 3458 struct ieee80211_chanctx_conf *ctx); 3459 void (*change_chanctx)(struct ieee80211_hw *hw, 3460 struct ieee80211_chanctx_conf *ctx, 3461 u32 changed); 3462 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 3463 struct ieee80211_vif *vif, 3464 struct ieee80211_chanctx_conf *ctx); 3465 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 3466 struct ieee80211_vif *vif, 3467 struct ieee80211_chanctx_conf *ctx); 3468 int (*switch_vif_chanctx)(struct ieee80211_hw *hw, 3469 struct ieee80211_vif_chanctx_switch *vifs, 3470 int n_vifs, 3471 enum ieee80211_chanctx_switch_mode mode); 3472 3473 void (*reconfig_complete)(struct ieee80211_hw *hw, 3474 enum ieee80211_reconfig_type reconfig_type); 3475 3476 #if IS_ENABLED(CONFIG_IPV6) 3477 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 3478 struct ieee80211_vif *vif, 3479 struct inet6_dev *idev); 3480 #endif 3481 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 3482 struct ieee80211_vif *vif, 3483 struct cfg80211_chan_def *chandef); 3484 int (*pre_channel_switch)(struct ieee80211_hw *hw, 3485 struct ieee80211_vif *vif, 3486 struct ieee80211_channel_switch *ch_switch); 3487 3488 int (*post_channel_switch)(struct ieee80211_hw *hw, 3489 struct ieee80211_vif *vif); 3490 3491 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3492 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3493 u32 (*get_expected_throughput)(struct ieee80211_sta *sta); 3494 int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3495 int *dbm); 3496 3497 int (*tdls_channel_switch)(struct ieee80211_hw *hw, 3498 struct ieee80211_vif *vif, 3499 struct ieee80211_sta *sta, u8 oper_class, 3500 struct cfg80211_chan_def *chandef, 3501 struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie); 3502 void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw, 3503 struct ieee80211_vif *vif, 3504 struct ieee80211_sta *sta); 3505 void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw, 3506 struct ieee80211_vif *vif, 3507 struct ieee80211_tdls_ch_sw_params *params); 3508 3509 void (*wake_tx_queue)(struct ieee80211_hw *hw, 3510 struct ieee80211_txq *txq); 3511 }; 3512 3513 /** 3514 * ieee80211_alloc_hw_nm - Allocate a new hardware device 3515 * 3516 * This must be called once for each hardware device. The returned pointer 3517 * must be used to refer to this device when calling other functions. 3518 * mac80211 allocates a private data area for the driver pointed to by 3519 * @priv in &struct ieee80211_hw, the size of this area is given as 3520 * @priv_data_len. 3521 * 3522 * @priv_data_len: length of private data 3523 * @ops: callbacks for this device 3524 * @requested_name: Requested name for this device. 3525 * NULL is valid value, and means use the default naming (phy%d) 3526 * 3527 * Return: A pointer to the new hardware device, or %NULL on error. 3528 */ 3529 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 3530 const struct ieee80211_ops *ops, 3531 const char *requested_name); 3532 3533 /** 3534 * ieee80211_alloc_hw - Allocate a new hardware device 3535 * 3536 * This must be called once for each hardware device. The returned pointer 3537 * must be used to refer to this device when calling other functions. 3538 * mac80211 allocates a private data area for the driver pointed to by 3539 * @priv in &struct ieee80211_hw, the size of this area is given as 3540 * @priv_data_len. 3541 * 3542 * @priv_data_len: length of private data 3543 * @ops: callbacks for this device 3544 * 3545 * Return: A pointer to the new hardware device, or %NULL on error. 3546 */ 3547 static inline 3548 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 3549 const struct ieee80211_ops *ops) 3550 { 3551 return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL); 3552 } 3553 3554 /** 3555 * ieee80211_register_hw - Register hardware device 3556 * 3557 * You must call this function before any other functions in 3558 * mac80211. Note that before a hardware can be registered, you 3559 * need to fill the contained wiphy's information. 3560 * 3561 * @hw: the device to register as returned by ieee80211_alloc_hw() 3562 * 3563 * Return: 0 on success. An error code otherwise. 3564 */ 3565 int ieee80211_register_hw(struct ieee80211_hw *hw); 3566 3567 /** 3568 * struct ieee80211_tpt_blink - throughput blink description 3569 * @throughput: throughput in Kbit/sec 3570 * @blink_time: blink time in milliseconds 3571 * (full cycle, ie. one off + one on period) 3572 */ 3573 struct ieee80211_tpt_blink { 3574 int throughput; 3575 int blink_time; 3576 }; 3577 3578 /** 3579 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3580 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3581 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3582 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3583 * interface is connected in some way, including being an AP 3584 */ 3585 enum ieee80211_tpt_led_trigger_flags { 3586 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3587 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3588 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3589 }; 3590 3591 #ifdef CONFIG_MAC80211_LEDS 3592 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3593 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3594 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3595 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3596 const char * 3597 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3598 unsigned int flags, 3599 const struct ieee80211_tpt_blink *blink_table, 3600 unsigned int blink_table_len); 3601 #endif 3602 /** 3603 * ieee80211_get_tx_led_name - get name of TX LED 3604 * 3605 * mac80211 creates a transmit LED trigger for each wireless hardware 3606 * that can be used to drive LEDs if your driver registers a LED device. 3607 * This function returns the name (or %NULL if not configured for LEDs) 3608 * of the trigger so you can automatically link the LED device. 3609 * 3610 * @hw: the hardware to get the LED trigger name for 3611 * 3612 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3613 */ 3614 static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3615 { 3616 #ifdef CONFIG_MAC80211_LEDS 3617 return __ieee80211_get_tx_led_name(hw); 3618 #else 3619 return NULL; 3620 #endif 3621 } 3622 3623 /** 3624 * ieee80211_get_rx_led_name - get name of RX LED 3625 * 3626 * mac80211 creates a receive LED trigger for each wireless hardware 3627 * that can be used to drive LEDs if your driver registers a LED device. 3628 * This function returns the name (or %NULL if not configured for LEDs) 3629 * of the trigger so you can automatically link the LED device. 3630 * 3631 * @hw: the hardware to get the LED trigger name for 3632 * 3633 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3634 */ 3635 static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3636 { 3637 #ifdef CONFIG_MAC80211_LEDS 3638 return __ieee80211_get_rx_led_name(hw); 3639 #else 3640 return NULL; 3641 #endif 3642 } 3643 3644 /** 3645 * ieee80211_get_assoc_led_name - get name of association LED 3646 * 3647 * mac80211 creates a association LED trigger for each wireless hardware 3648 * that can be used to drive LEDs if your driver registers a LED device. 3649 * This function returns the name (or %NULL if not configured for LEDs) 3650 * of the trigger so you can automatically link the LED device. 3651 * 3652 * @hw: the hardware to get the LED trigger name for 3653 * 3654 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3655 */ 3656 static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3657 { 3658 #ifdef CONFIG_MAC80211_LEDS 3659 return __ieee80211_get_assoc_led_name(hw); 3660 #else 3661 return NULL; 3662 #endif 3663 } 3664 3665 /** 3666 * ieee80211_get_radio_led_name - get name of radio LED 3667 * 3668 * mac80211 creates a radio change LED trigger for each wireless hardware 3669 * that can be used to drive LEDs if your driver registers a LED device. 3670 * This function returns the name (or %NULL if not configured for LEDs) 3671 * of the trigger so you can automatically link the LED device. 3672 * 3673 * @hw: the hardware to get the LED trigger name for 3674 * 3675 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3676 */ 3677 static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3678 { 3679 #ifdef CONFIG_MAC80211_LEDS 3680 return __ieee80211_get_radio_led_name(hw); 3681 #else 3682 return NULL; 3683 #endif 3684 } 3685 3686 /** 3687 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3688 * @hw: the hardware to create the trigger for 3689 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3690 * @blink_table: the blink table -- needs to be ordered by throughput 3691 * @blink_table_len: size of the blink table 3692 * 3693 * Return: %NULL (in case of error, or if no LED triggers are 3694 * configured) or the name of the new trigger. 3695 * 3696 * Note: This function must be called before ieee80211_register_hw(). 3697 */ 3698 static inline const char * 3699 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3700 const struct ieee80211_tpt_blink *blink_table, 3701 unsigned int blink_table_len) 3702 { 3703 #ifdef CONFIG_MAC80211_LEDS 3704 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3705 blink_table_len); 3706 #else 3707 return NULL; 3708 #endif 3709 } 3710 3711 /** 3712 * ieee80211_unregister_hw - Unregister a hardware device 3713 * 3714 * This function instructs mac80211 to free allocated resources 3715 * and unregister netdevices from the networking subsystem. 3716 * 3717 * @hw: the hardware to unregister 3718 */ 3719 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3720 3721 /** 3722 * ieee80211_free_hw - free hardware descriptor 3723 * 3724 * This function frees everything that was allocated, including the 3725 * private data for the driver. You must call ieee80211_unregister_hw() 3726 * before calling this function. 3727 * 3728 * @hw: the hardware to free 3729 */ 3730 void ieee80211_free_hw(struct ieee80211_hw *hw); 3731 3732 /** 3733 * ieee80211_restart_hw - restart hardware completely 3734 * 3735 * Call this function when the hardware was restarted for some reason 3736 * (hardware error, ...) and the driver is unable to restore its state 3737 * by itself. mac80211 assumes that at this point the driver/hardware 3738 * is completely uninitialised and stopped, it starts the process by 3739 * calling the ->start() operation. The driver will need to reset all 3740 * internal state that it has prior to calling this function. 3741 * 3742 * @hw: the hardware to restart 3743 */ 3744 void ieee80211_restart_hw(struct ieee80211_hw *hw); 3745 3746 /** 3747 * ieee80211_rx_napi - receive frame from NAPI context 3748 * 3749 * Use this function to hand received frames to mac80211. The receive 3750 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3751 * paged @skb is used, the driver is recommended to put the ieee80211 3752 * header of the frame on the linear part of the @skb to avoid memory 3753 * allocation and/or memcpy by the stack. 3754 * 3755 * This function may not be called in IRQ context. Calls to this function 3756 * for a single hardware must be synchronized against each other. Calls to 3757 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3758 * mixed for a single hardware. Must not run concurrently with 3759 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3760 * 3761 * This function must be called with BHs disabled. 3762 * 3763 * @hw: the hardware this frame came in on 3764 * @skb: the buffer to receive, owned by mac80211 after this call 3765 * @napi: the NAPI context 3766 */ 3767 void ieee80211_rx_napi(struct ieee80211_hw *hw, struct sk_buff *skb, 3768 struct napi_struct *napi); 3769 3770 /** 3771 * ieee80211_rx - receive frame 3772 * 3773 * Use this function to hand received frames to mac80211. The receive 3774 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3775 * paged @skb is used, the driver is recommended to put the ieee80211 3776 * header of the frame on the linear part of the @skb to avoid memory 3777 * allocation and/or memcpy by the stack. 3778 * 3779 * This function may not be called in IRQ context. Calls to this function 3780 * for a single hardware must be synchronized against each other. Calls to 3781 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3782 * mixed for a single hardware. Must not run concurrently with 3783 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3784 * 3785 * In process context use instead ieee80211_rx_ni(). 3786 * 3787 * @hw: the hardware this frame came in on 3788 * @skb: the buffer to receive, owned by mac80211 after this call 3789 */ 3790 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) 3791 { 3792 ieee80211_rx_napi(hw, skb, NULL); 3793 } 3794 3795 /** 3796 * ieee80211_rx_irqsafe - receive frame 3797 * 3798 * Like ieee80211_rx() but can be called in IRQ context 3799 * (internally defers to a tasklet.) 3800 * 3801 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3802 * be mixed for a single hardware.Must not run concurrently with 3803 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3804 * 3805 * @hw: the hardware this frame came in on 3806 * @skb: the buffer to receive, owned by mac80211 after this call 3807 */ 3808 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3809 3810 /** 3811 * ieee80211_rx_ni - receive frame (in process context) 3812 * 3813 * Like ieee80211_rx() but can be called in process context 3814 * (internally disables bottom halves). 3815 * 3816 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3817 * not be mixed for a single hardware. Must not run concurrently with 3818 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3819 * 3820 * @hw: the hardware this frame came in on 3821 * @skb: the buffer to receive, owned by mac80211 after this call 3822 */ 3823 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3824 struct sk_buff *skb) 3825 { 3826 local_bh_disable(); 3827 ieee80211_rx(hw, skb); 3828 local_bh_enable(); 3829 } 3830 3831 /** 3832 * ieee80211_sta_ps_transition - PS transition for connected sta 3833 * 3834 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3835 * flag set, use this function to inform mac80211 about a connected station 3836 * entering/leaving PS mode. 3837 * 3838 * This function may not be called in IRQ context or with softirqs enabled. 3839 * 3840 * Calls to this function for a single hardware must be synchronized against 3841 * each other. 3842 * 3843 * @sta: currently connected sta 3844 * @start: start or stop PS 3845 * 3846 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3847 */ 3848 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3849 3850 /** 3851 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3852 * (in process context) 3853 * 3854 * Like ieee80211_sta_ps_transition() but can be called in process context 3855 * (internally disables bottom halves). Concurrent call restriction still 3856 * applies. 3857 * 3858 * @sta: currently connected sta 3859 * @start: start or stop PS 3860 * 3861 * Return: Like ieee80211_sta_ps_transition(). 3862 */ 3863 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3864 bool start) 3865 { 3866 int ret; 3867 3868 local_bh_disable(); 3869 ret = ieee80211_sta_ps_transition(sta, start); 3870 local_bh_enable(); 3871 3872 return ret; 3873 } 3874 3875 /* 3876 * The TX headroom reserved by mac80211 for its own tx_status functions. 3877 * This is enough for the radiotap header. 3878 */ 3879 #define IEEE80211_TX_STATUS_HEADROOM 14 3880 3881 /** 3882 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3883 * @sta: &struct ieee80211_sta pointer for the sleeping station 3884 * @tid: the TID that has buffered frames 3885 * @buffered: indicates whether or not frames are buffered for this TID 3886 * 3887 * If a driver buffers frames for a powersave station instead of passing 3888 * them back to mac80211 for retransmission, the station may still need 3889 * to be told that there are buffered frames via the TIM bit. 3890 * 3891 * This function informs mac80211 whether or not there are frames that are 3892 * buffered in the driver for a given TID; mac80211 can then use this data 3893 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3894 * call! Beware of the locking!) 3895 * 3896 * If all frames are released to the station (due to PS-poll or uAPSD) 3897 * then the driver needs to inform mac80211 that there no longer are 3898 * frames buffered. However, when the station wakes up mac80211 assumes 3899 * that all buffered frames will be transmitted and clears this data, 3900 * drivers need to make sure they inform mac80211 about all buffered 3901 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3902 * 3903 * Note that technically mac80211 only needs to know this per AC, not per 3904 * TID, but since driver buffering will inevitably happen per TID (since 3905 * it is related to aggregation) it is easier to make mac80211 map the 3906 * TID to the AC as required instead of keeping track in all drivers that 3907 * use this API. 3908 */ 3909 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3910 u8 tid, bool buffered); 3911 3912 /** 3913 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 3914 * 3915 * Call this function in a driver with per-packet rate selection support 3916 * to combine the rate info in the packet tx info with the most recent 3917 * rate selection table for the station entry. 3918 * 3919 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3920 * @sta: the receiver station to which this packet is sent. 3921 * @skb: the frame to be transmitted. 3922 * @dest: buffer for extracted rate/retry information 3923 * @max_rates: maximum number of rates to fetch 3924 */ 3925 void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 3926 struct ieee80211_sta *sta, 3927 struct sk_buff *skb, 3928 struct ieee80211_tx_rate *dest, 3929 int max_rates); 3930 3931 /** 3932 * ieee80211_tx_status - transmit status callback 3933 * 3934 * Call this function for all transmitted frames after they have been 3935 * transmitted. It is permissible to not call this function for 3936 * multicast frames but this can affect statistics. 3937 * 3938 * This function may not be called in IRQ context. Calls to this function 3939 * for a single hardware must be synchronized against each other. Calls 3940 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3941 * may not be mixed for a single hardware. Must not run concurrently with 3942 * ieee80211_rx() or ieee80211_rx_ni(). 3943 * 3944 * @hw: the hardware the frame was transmitted by 3945 * @skb: the frame that was transmitted, owned by mac80211 after this call 3946 */ 3947 void ieee80211_tx_status(struct ieee80211_hw *hw, 3948 struct sk_buff *skb); 3949 3950 /** 3951 * ieee80211_tx_status_noskb - transmit status callback without skb 3952 * 3953 * This function can be used as a replacement for ieee80211_tx_status 3954 * in drivers that cannot reliably map tx status information back to 3955 * specific skbs. 3956 * 3957 * Calls to this function for a single hardware must be synchronized 3958 * against each other. Calls to this function, ieee80211_tx_status_ni() 3959 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware. 3960 * 3961 * @hw: the hardware the frame was transmitted by 3962 * @sta: the receiver station to which this packet is sent 3963 * (NULL for multicast packets) 3964 * @info: tx status information 3965 */ 3966 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, 3967 struct ieee80211_sta *sta, 3968 struct ieee80211_tx_info *info); 3969 3970 /** 3971 * ieee80211_tx_status_ni - transmit status callback (in process context) 3972 * 3973 * Like ieee80211_tx_status() but can be called in process context. 3974 * 3975 * Calls to this function, ieee80211_tx_status() and 3976 * ieee80211_tx_status_irqsafe() may not be mixed 3977 * for a single hardware. 3978 * 3979 * @hw: the hardware the frame was transmitted by 3980 * @skb: the frame that was transmitted, owned by mac80211 after this call 3981 */ 3982 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3983 struct sk_buff *skb) 3984 { 3985 local_bh_disable(); 3986 ieee80211_tx_status(hw, skb); 3987 local_bh_enable(); 3988 } 3989 3990 /** 3991 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3992 * 3993 * Like ieee80211_tx_status() but can be called in IRQ context 3994 * (internally defers to a tasklet.) 3995 * 3996 * Calls to this function, ieee80211_tx_status() and 3997 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3998 * 3999 * @hw: the hardware the frame was transmitted by 4000 * @skb: the frame that was transmitted, owned by mac80211 after this call 4001 */ 4002 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 4003 struct sk_buff *skb); 4004 4005 /** 4006 * ieee80211_report_low_ack - report non-responding station 4007 * 4008 * When operating in AP-mode, call this function to report a non-responding 4009 * connected STA. 4010 * 4011 * @sta: the non-responding connected sta 4012 * @num_packets: number of packets sent to @sta without a response 4013 */ 4014 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 4015 4016 #define IEEE80211_MAX_CSA_COUNTERS_NUM 2 4017 4018 /** 4019 * struct ieee80211_mutable_offsets - mutable beacon offsets 4020 * @tim_offset: position of TIM element 4021 * @tim_length: size of TIM element 4022 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets 4023 * to CSA counters. This array can contain zero values which 4024 * should be ignored. 4025 */ 4026 struct ieee80211_mutable_offsets { 4027 u16 tim_offset; 4028 u16 tim_length; 4029 4030 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; 4031 }; 4032 4033 /** 4034 * ieee80211_beacon_get_template - beacon template generation function 4035 * @hw: pointer obtained from ieee80211_alloc_hw(). 4036 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4037 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will 4038 * receive the offsets that may be updated by the driver. 4039 * 4040 * If the driver implements beaconing modes, it must use this function to 4041 * obtain the beacon template. 4042 * 4043 * This function should be used if the beacon frames are generated by the 4044 * device, and then the driver must use the returned beacon as the template 4045 * The driver or the device are responsible to update the DTIM and, when 4046 * applicable, the CSA count. 4047 * 4048 * The driver is responsible for freeing the returned skb. 4049 * 4050 * Return: The beacon template. %NULL on error. 4051 */ 4052 struct sk_buff * 4053 ieee80211_beacon_get_template(struct ieee80211_hw *hw, 4054 struct ieee80211_vif *vif, 4055 struct ieee80211_mutable_offsets *offs); 4056 4057 /** 4058 * ieee80211_beacon_get_tim - beacon generation function 4059 * @hw: pointer obtained from ieee80211_alloc_hw(). 4060 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4061 * @tim_offset: pointer to variable that will receive the TIM IE offset. 4062 * Set to 0 if invalid (in non-AP modes). 4063 * @tim_length: pointer to variable that will receive the TIM IE length, 4064 * (including the ID and length bytes!). 4065 * Set to 0 if invalid (in non-AP modes). 4066 * 4067 * If the driver implements beaconing modes, it must use this function to 4068 * obtain the beacon frame. 4069 * 4070 * If the beacon frames are generated by the host system (i.e., not in 4071 * hardware/firmware), the driver uses this function to get each beacon 4072 * frame from mac80211 -- it is responsible for calling this function exactly 4073 * once before the beacon is needed (e.g. based on hardware interrupt). 4074 * 4075 * The driver is responsible for freeing the returned skb. 4076 * 4077 * Return: The beacon template. %NULL on error. 4078 */ 4079 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 4080 struct ieee80211_vif *vif, 4081 u16 *tim_offset, u16 *tim_length); 4082 4083 /** 4084 * ieee80211_beacon_get - beacon generation function 4085 * @hw: pointer obtained from ieee80211_alloc_hw(). 4086 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4087 * 4088 * See ieee80211_beacon_get_tim(). 4089 * 4090 * Return: See ieee80211_beacon_get_tim(). 4091 */ 4092 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 4093 struct ieee80211_vif *vif) 4094 { 4095 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 4096 } 4097 4098 /** 4099 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter 4100 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4101 * 4102 * The csa counter should be updated after each beacon transmission. 4103 * This function is called implicitly when 4104 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the 4105 * beacon frames are generated by the device, the driver should call this 4106 * function after each beacon transmission to sync mac80211's csa counters. 4107 * 4108 * Return: new csa counter value 4109 */ 4110 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif); 4111 4112 /** 4113 * ieee80211_csa_finish - notify mac80211 about channel switch 4114 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4115 * 4116 * After a channel switch announcement was scheduled and the counter in this 4117 * announcement hits 1, this function must be called by the driver to 4118 * notify mac80211 that the channel can be changed. 4119 */ 4120 void ieee80211_csa_finish(struct ieee80211_vif *vif); 4121 4122 /** 4123 * ieee80211_csa_is_complete - find out if counters reached 1 4124 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4125 * 4126 * This function returns whether the channel switch counters reached zero. 4127 */ 4128 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 4129 4130 4131 /** 4132 * ieee80211_proberesp_get - retrieve a Probe Response template 4133 * @hw: pointer obtained from ieee80211_alloc_hw(). 4134 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4135 * 4136 * Creates a Probe Response template which can, for example, be uploaded to 4137 * hardware. The destination address should be set by the caller. 4138 * 4139 * Can only be called in AP mode. 4140 * 4141 * Return: The Probe Response template. %NULL on error. 4142 */ 4143 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 4144 struct ieee80211_vif *vif); 4145 4146 /** 4147 * ieee80211_pspoll_get - retrieve a PS Poll template 4148 * @hw: pointer obtained from ieee80211_alloc_hw(). 4149 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4150 * 4151 * Creates a PS Poll a template which can, for example, uploaded to 4152 * hardware. The template must be updated after association so that correct 4153 * AID, BSSID and MAC address is used. 4154 * 4155 * Note: Caller (or hardware) is responsible for setting the 4156 * &IEEE80211_FCTL_PM bit. 4157 * 4158 * Return: The PS Poll template. %NULL on error. 4159 */ 4160 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 4161 struct ieee80211_vif *vif); 4162 4163 /** 4164 * ieee80211_nullfunc_get - retrieve a nullfunc template 4165 * @hw: pointer obtained from ieee80211_alloc_hw(). 4166 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4167 * 4168 * Creates a Nullfunc template which can, for example, uploaded to 4169 * hardware. The template must be updated after association so that correct 4170 * BSSID and address is used. 4171 * 4172 * Note: Caller (or hardware) is responsible for setting the 4173 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 4174 * 4175 * Return: The nullfunc template. %NULL on error. 4176 */ 4177 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 4178 struct ieee80211_vif *vif); 4179 4180 /** 4181 * ieee80211_probereq_get - retrieve a Probe Request template 4182 * @hw: pointer obtained from ieee80211_alloc_hw(). 4183 * @src_addr: source MAC address 4184 * @ssid: SSID buffer 4185 * @ssid_len: length of SSID 4186 * @tailroom: tailroom to reserve at end of SKB for IEs 4187 * 4188 * Creates a Probe Request template which can, for example, be uploaded to 4189 * hardware. 4190 * 4191 * Return: The Probe Request template. %NULL on error. 4192 */ 4193 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 4194 const u8 *src_addr, 4195 const u8 *ssid, size_t ssid_len, 4196 size_t tailroom); 4197 4198 /** 4199 * ieee80211_rts_get - RTS frame generation function 4200 * @hw: pointer obtained from ieee80211_alloc_hw(). 4201 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4202 * @frame: pointer to the frame that is going to be protected by the RTS. 4203 * @frame_len: the frame length (in octets). 4204 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4205 * @rts: The buffer where to store the RTS frame. 4206 * 4207 * If the RTS frames are generated by the host system (i.e., not in 4208 * hardware/firmware), the low-level driver uses this function to receive 4209 * the next RTS frame from the 802.11 code. The low-level is responsible 4210 * for calling this function before and RTS frame is needed. 4211 */ 4212 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 4213 const void *frame, size_t frame_len, 4214 const struct ieee80211_tx_info *frame_txctl, 4215 struct ieee80211_rts *rts); 4216 4217 /** 4218 * ieee80211_rts_duration - Get the duration field for an RTS frame 4219 * @hw: pointer obtained from ieee80211_alloc_hw(). 4220 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4221 * @frame_len: the length of the frame that is going to be protected by the RTS. 4222 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4223 * 4224 * If the RTS is generated in firmware, but the host system must provide 4225 * the duration field, the low-level driver uses this function to receive 4226 * the duration field value in little-endian byteorder. 4227 * 4228 * Return: The duration. 4229 */ 4230 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 4231 struct ieee80211_vif *vif, size_t frame_len, 4232 const struct ieee80211_tx_info *frame_txctl); 4233 4234 /** 4235 * ieee80211_ctstoself_get - CTS-to-self frame generation function 4236 * @hw: pointer obtained from ieee80211_alloc_hw(). 4237 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4238 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 4239 * @frame_len: the frame length (in octets). 4240 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4241 * @cts: The buffer where to store the CTS-to-self frame. 4242 * 4243 * If the CTS-to-self frames are generated by the host system (i.e., not in 4244 * hardware/firmware), the low-level driver uses this function to receive 4245 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 4246 * for calling this function before and CTS-to-self frame is needed. 4247 */ 4248 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 4249 struct ieee80211_vif *vif, 4250 const void *frame, size_t frame_len, 4251 const struct ieee80211_tx_info *frame_txctl, 4252 struct ieee80211_cts *cts); 4253 4254 /** 4255 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 4256 * @hw: pointer obtained from ieee80211_alloc_hw(). 4257 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4258 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 4259 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4260 * 4261 * If the CTS-to-self is generated in firmware, but the host system must provide 4262 * the duration field, the low-level driver uses this function to receive 4263 * the duration field value in little-endian byteorder. 4264 * 4265 * Return: The duration. 4266 */ 4267 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 4268 struct ieee80211_vif *vif, 4269 size_t frame_len, 4270 const struct ieee80211_tx_info *frame_txctl); 4271 4272 /** 4273 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 4274 * @hw: pointer obtained from ieee80211_alloc_hw(). 4275 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4276 * @band: the band to calculate the frame duration on 4277 * @frame_len: the length of the frame. 4278 * @rate: the rate at which the frame is going to be transmitted. 4279 * 4280 * Calculate the duration field of some generic frame, given its 4281 * length and transmission rate (in 100kbps). 4282 * 4283 * Return: The duration. 4284 */ 4285 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 4286 struct ieee80211_vif *vif, 4287 enum ieee80211_band band, 4288 size_t frame_len, 4289 struct ieee80211_rate *rate); 4290 4291 /** 4292 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 4293 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4294 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4295 * 4296 * Function for accessing buffered broadcast and multicast frames. If 4297 * hardware/firmware does not implement buffering of broadcast/multicast 4298 * frames when power saving is used, 802.11 code buffers them in the host 4299 * memory. The low-level driver uses this function to fetch next buffered 4300 * frame. In most cases, this is used when generating beacon frame. 4301 * 4302 * Return: A pointer to the next buffered skb or NULL if no more buffered 4303 * frames are available. 4304 * 4305 * Note: buffered frames are returned only after DTIM beacon frame was 4306 * generated with ieee80211_beacon_get() and the low-level driver must thus 4307 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 4308 * NULL if the previous generated beacon was not DTIM, so the low-level driver 4309 * does not need to check for DTIM beacons separately and should be able to 4310 * use common code for all beacons. 4311 */ 4312 struct sk_buff * 4313 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 4314 4315 /** 4316 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 4317 * 4318 * This function returns the TKIP phase 1 key for the given IV32. 4319 * 4320 * @keyconf: the parameter passed with the set key 4321 * @iv32: IV32 to get the P1K for 4322 * @p1k: a buffer to which the key will be written, as 5 u16 values 4323 */ 4324 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 4325 u32 iv32, u16 *p1k); 4326 4327 /** 4328 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 4329 * 4330 * This function returns the TKIP phase 1 key for the IV32 taken 4331 * from the given packet. 4332 * 4333 * @keyconf: the parameter passed with the set key 4334 * @skb: the packet to take the IV32 value from that will be encrypted 4335 * with this P1K 4336 * @p1k: a buffer to which the key will be written, as 5 u16 values 4337 */ 4338 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 4339 struct sk_buff *skb, u16 *p1k) 4340 { 4341 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 4342 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 4343 u32 iv32 = get_unaligned_le32(&data[4]); 4344 4345 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 4346 } 4347 4348 /** 4349 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 4350 * 4351 * This function returns the TKIP phase 1 key for the given IV32 4352 * and transmitter address. 4353 * 4354 * @keyconf: the parameter passed with the set key 4355 * @ta: TA that will be used with the key 4356 * @iv32: IV32 to get the P1K for 4357 * @p1k: a buffer to which the key will be written, as 5 u16 values 4358 */ 4359 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 4360 const u8 *ta, u32 iv32, u16 *p1k); 4361 4362 /** 4363 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 4364 * 4365 * This function computes the TKIP RC4 key for the IV values 4366 * in the packet. 4367 * 4368 * @keyconf: the parameter passed with the set key 4369 * @skb: the packet to take the IV32/IV16 values from that will be 4370 * encrypted with this key 4371 * @p2k: a buffer to which the key will be written, 16 bytes 4372 */ 4373 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 4374 struct sk_buff *skb, u8 *p2k); 4375 4376 /** 4377 * ieee80211_get_key_tx_seq - get key TX sequence counter 4378 * 4379 * @keyconf: the parameter passed with the set key 4380 * @seq: buffer to receive the sequence data 4381 * 4382 * This function allows a driver to retrieve the current TX IV/PN 4383 * for the given key. It must not be called if IV generation is 4384 * offloaded to the device. 4385 * 4386 * Note that this function may only be called when no TX processing 4387 * can be done concurrently, for example when queues are stopped 4388 * and the stop has been synchronized. 4389 */ 4390 void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 4391 struct ieee80211_key_seq *seq); 4392 4393 /** 4394 * ieee80211_get_key_rx_seq - get key RX sequence counter 4395 * 4396 * @keyconf: the parameter passed with the set key 4397 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4398 * the value on TID 0 is also used for non-QoS frames. For 4399 * CMAC, only TID 0 is valid. 4400 * @seq: buffer to receive the sequence data 4401 * 4402 * This function allows a driver to retrieve the current RX IV/PNs 4403 * for the given key. It must not be called if IV checking is done 4404 * by the device and not by mac80211. 4405 * 4406 * Note that this function may only be called when no RX processing 4407 * can be done concurrently. 4408 */ 4409 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 4410 int tid, struct ieee80211_key_seq *seq); 4411 4412 /** 4413 * ieee80211_set_key_tx_seq - set key TX sequence counter 4414 * 4415 * @keyconf: the parameter passed with the set key 4416 * @seq: new sequence data 4417 * 4418 * This function allows a driver to set the current TX IV/PNs for the 4419 * given key. This is useful when resuming from WoWLAN sleep and the 4420 * device may have transmitted frames using the PTK, e.g. replies to 4421 * ARP requests. 4422 * 4423 * Note that this function may only be called when no TX processing 4424 * can be done concurrently. 4425 */ 4426 void ieee80211_set_key_tx_seq(struct ieee80211_key_conf *keyconf, 4427 struct ieee80211_key_seq *seq); 4428 4429 /** 4430 * ieee80211_set_key_rx_seq - set key RX sequence counter 4431 * 4432 * @keyconf: the parameter passed with the set key 4433 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4434 * the value on TID 0 is also used for non-QoS frames. For 4435 * CMAC, only TID 0 is valid. 4436 * @seq: new sequence data 4437 * 4438 * This function allows a driver to set the current RX IV/PNs for the 4439 * given key. This is useful when resuming from WoWLAN sleep and GTK 4440 * rekey may have been done while suspended. It should not be called 4441 * if IV checking is done by the device and not by mac80211. 4442 * 4443 * Note that this function may only be called when no RX processing 4444 * can be done concurrently. 4445 */ 4446 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 4447 int tid, struct ieee80211_key_seq *seq); 4448 4449 /** 4450 * ieee80211_remove_key - remove the given key 4451 * @keyconf: the parameter passed with the set key 4452 * 4453 * Remove the given key. If the key was uploaded to the hardware at the 4454 * time this function is called, it is not deleted in the hardware but 4455 * instead assumed to have been removed already. 4456 * 4457 * Note that due to locking considerations this function can (currently) 4458 * only be called during key iteration (ieee80211_iter_keys().) 4459 */ 4460 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 4461 4462 /** 4463 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 4464 * @vif: the virtual interface to add the key on 4465 * @keyconf: new key data 4466 * 4467 * When GTK rekeying was done while the system was suspended, (a) new 4468 * key(s) will be available. These will be needed by mac80211 for proper 4469 * RX processing, so this function allows setting them. 4470 * 4471 * The function returns the newly allocated key structure, which will 4472 * have similar contents to the passed key configuration but point to 4473 * mac80211-owned memory. In case of errors, the function returns an 4474 * ERR_PTR(), use IS_ERR() etc. 4475 * 4476 * Note that this function assumes the key isn't added to hardware 4477 * acceleration, so no TX will be done with the key. Since it's a GTK 4478 * on managed (station) networks, this is true anyway. If the driver 4479 * calls this function from the resume callback and subsequently uses 4480 * the return code 1 to reconfigure the device, this key will be part 4481 * of the reconfiguration. 4482 * 4483 * Note that the driver should also call ieee80211_set_key_rx_seq() 4484 * for the new key for each TID to set up sequence counters properly. 4485 * 4486 * IMPORTANT: If this replaces a key that is present in the hardware, 4487 * then it will attempt to remove it during this call. In many cases 4488 * this isn't what you want, so call ieee80211_remove_key() first for 4489 * the key that's being replaced. 4490 */ 4491 struct ieee80211_key_conf * 4492 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 4493 struct ieee80211_key_conf *keyconf); 4494 4495 /** 4496 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 4497 * @vif: virtual interface the rekeying was done on 4498 * @bssid: The BSSID of the AP, for checking association 4499 * @replay_ctr: the new replay counter after GTK rekeying 4500 * @gfp: allocation flags 4501 */ 4502 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 4503 const u8 *replay_ctr, gfp_t gfp); 4504 4505 /** 4506 * ieee80211_wake_queue - wake specific queue 4507 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4508 * @queue: queue number (counted from zero). 4509 * 4510 * Drivers should use this function instead of netif_wake_queue. 4511 */ 4512 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 4513 4514 /** 4515 * ieee80211_stop_queue - stop specific queue 4516 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4517 * @queue: queue number (counted from zero). 4518 * 4519 * Drivers should use this function instead of netif_stop_queue. 4520 */ 4521 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 4522 4523 /** 4524 * ieee80211_queue_stopped - test status of the queue 4525 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4526 * @queue: queue number (counted from zero). 4527 * 4528 * Drivers should use this function instead of netif_stop_queue. 4529 * 4530 * Return: %true if the queue is stopped. %false otherwise. 4531 */ 4532 4533 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 4534 4535 /** 4536 * ieee80211_stop_queues - stop all queues 4537 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4538 * 4539 * Drivers should use this function instead of netif_stop_queue. 4540 */ 4541 void ieee80211_stop_queues(struct ieee80211_hw *hw); 4542 4543 /** 4544 * ieee80211_wake_queues - wake all queues 4545 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4546 * 4547 * Drivers should use this function instead of netif_wake_queue. 4548 */ 4549 void ieee80211_wake_queues(struct ieee80211_hw *hw); 4550 4551 /** 4552 * ieee80211_scan_completed - completed hardware scan 4553 * 4554 * When hardware scan offload is used (i.e. the hw_scan() callback is 4555 * assigned) this function needs to be called by the driver to notify 4556 * mac80211 that the scan finished. This function can be called from 4557 * any context, including hardirq context. 4558 * 4559 * @hw: the hardware that finished the scan 4560 * @aborted: set to true if scan was aborted 4561 */ 4562 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 4563 4564 /** 4565 * ieee80211_sched_scan_results - got results from scheduled scan 4566 * 4567 * When a scheduled scan is running, this function needs to be called by the 4568 * driver whenever there are new scan results available. 4569 * 4570 * @hw: the hardware that is performing scheduled scans 4571 */ 4572 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 4573 4574 /** 4575 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 4576 * 4577 * When a scheduled scan is running, this function can be called by 4578 * the driver if it needs to stop the scan to perform another task. 4579 * Usual scenarios are drivers that cannot continue the scheduled scan 4580 * while associating, for instance. 4581 * 4582 * @hw: the hardware that is performing scheduled scans 4583 */ 4584 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 4585 4586 /** 4587 * enum ieee80211_interface_iteration_flags - interface iteration flags 4588 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 4589 * been added to the driver; However, note that during hardware 4590 * reconfiguration (after restart_hw) it will iterate over a new 4591 * interface and over all the existing interfaces even if they 4592 * haven't been re-added to the driver yet. 4593 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 4594 * interfaces, even if they haven't been re-added to the driver yet. 4595 * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up). 4596 */ 4597 enum ieee80211_interface_iteration_flags { 4598 IEEE80211_IFACE_ITER_NORMAL = 0, 4599 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 4600 IEEE80211_IFACE_ITER_ACTIVE = BIT(1), 4601 }; 4602 4603 /** 4604 * ieee80211_iterate_interfaces - iterate interfaces 4605 * 4606 * This function iterates over the interfaces associated with a given 4607 * hardware and calls the callback for them. This includes active as well as 4608 * inactive interfaces. This function allows the iterator function to sleep. 4609 * Will iterate over a new interface during add_interface(). 4610 * 4611 * @hw: the hardware struct of which the interfaces should be iterated over 4612 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4613 * @iterator: the iterator function to call 4614 * @data: first argument of the iterator function 4615 */ 4616 void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4617 void (*iterator)(void *data, u8 *mac, 4618 struct ieee80211_vif *vif), 4619 void *data); 4620 4621 /** 4622 * ieee80211_iterate_active_interfaces - iterate active interfaces 4623 * 4624 * This function iterates over the interfaces associated with a given 4625 * hardware that are currently active and calls the callback for them. 4626 * This function allows the iterator function to sleep, when the iterator 4627 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 4628 * be used. 4629 * Does not iterate over a new interface during add_interface(). 4630 * 4631 * @hw: the hardware struct of which the interfaces should be iterated over 4632 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4633 * @iterator: the iterator function to call 4634 * @data: first argument of the iterator function 4635 */ 4636 static inline void 4637 ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4638 void (*iterator)(void *data, u8 *mac, 4639 struct ieee80211_vif *vif), 4640 void *data) 4641 { 4642 ieee80211_iterate_interfaces(hw, 4643 iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 4644 iterator, data); 4645 } 4646 4647 /** 4648 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 4649 * 4650 * This function iterates over the interfaces associated with a given 4651 * hardware that are currently active and calls the callback for them. 4652 * This function requires the iterator callback function to be atomic, 4653 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4654 * Does not iterate over a new interface during add_interface(). 4655 * 4656 * @hw: the hardware struct of which the interfaces should be iterated over 4657 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4658 * @iterator: the iterator function to call, cannot sleep 4659 * @data: first argument of the iterator function 4660 */ 4661 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4662 u32 iter_flags, 4663 void (*iterator)(void *data, 4664 u8 *mac, 4665 struct ieee80211_vif *vif), 4666 void *data); 4667 4668 /** 4669 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4670 * 4671 * This function iterates over the interfaces associated with a given 4672 * hardware that are currently active and calls the callback for them. 4673 * This version can only be used while holding the RTNL. 4674 * 4675 * @hw: the hardware struct of which the interfaces should be iterated over 4676 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4677 * @iterator: the iterator function to call, cannot sleep 4678 * @data: first argument of the iterator function 4679 */ 4680 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4681 u32 iter_flags, 4682 void (*iterator)(void *data, 4683 u8 *mac, 4684 struct ieee80211_vif *vif), 4685 void *data); 4686 4687 /** 4688 * ieee80211_iterate_stations_atomic - iterate stations 4689 * 4690 * This function iterates over all stations associated with a given 4691 * hardware that are currently uploaded to the driver and calls the callback 4692 * function for them. 4693 * This function requires the iterator callback function to be atomic, 4694 * 4695 * @hw: the hardware struct of which the interfaces should be iterated over 4696 * @iterator: the iterator function to call, cannot sleep 4697 * @data: first argument of the iterator function 4698 */ 4699 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 4700 void (*iterator)(void *data, 4701 struct ieee80211_sta *sta), 4702 void *data); 4703 /** 4704 * ieee80211_queue_work - add work onto the mac80211 workqueue 4705 * 4706 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4707 * This helper ensures drivers are not queueing work when they should not be. 4708 * 4709 * @hw: the hardware struct for the interface we are adding work for 4710 * @work: the work we want to add onto the mac80211 workqueue 4711 */ 4712 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4713 4714 /** 4715 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4716 * 4717 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4718 * workqueue. 4719 * 4720 * @hw: the hardware struct for the interface we are adding work for 4721 * @dwork: delayable work to queue onto the mac80211 workqueue 4722 * @delay: number of jiffies to wait before queueing 4723 */ 4724 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4725 struct delayed_work *dwork, 4726 unsigned long delay); 4727 4728 /** 4729 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4730 * @sta: the station for which to start a BA session 4731 * @tid: the TID to BA on. 4732 * @timeout: session timeout value (in TUs) 4733 * 4734 * Return: success if addBA request was sent, failure otherwise 4735 * 4736 * Although mac80211/low level driver/user space application can estimate 4737 * the need to start aggregation on a certain RA/TID, the session level 4738 * will be managed by the mac80211. 4739 */ 4740 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4741 u16 timeout); 4742 4743 /** 4744 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4745 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4746 * @ra: receiver address of the BA session recipient. 4747 * @tid: the TID to BA on. 4748 * 4749 * This function must be called by low level driver once it has 4750 * finished with preparations for the BA session. It can be called 4751 * from any context. 4752 */ 4753 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4754 u16 tid); 4755 4756 /** 4757 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4758 * @sta: the station whose BA session to stop 4759 * @tid: the TID to stop BA. 4760 * 4761 * Return: negative error if the TID is invalid, or no aggregation active 4762 * 4763 * Although mac80211/low level driver/user space application can estimate 4764 * the need to stop aggregation on a certain RA/TID, the session level 4765 * will be managed by the mac80211. 4766 */ 4767 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4768 4769 /** 4770 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4771 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4772 * @ra: receiver address of the BA session recipient. 4773 * @tid: the desired TID to BA on. 4774 * 4775 * This function must be called by low level driver once it has 4776 * finished with preparations for the BA session tear down. It 4777 * can be called from any context. 4778 */ 4779 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4780 u16 tid); 4781 4782 /** 4783 * ieee80211_find_sta - find a station 4784 * 4785 * @vif: virtual interface to look for station on 4786 * @addr: station's address 4787 * 4788 * Return: The station, if found. %NULL otherwise. 4789 * 4790 * Note: This function must be called under RCU lock and the 4791 * resulting pointer is only valid under RCU lock as well. 4792 */ 4793 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4794 const u8 *addr); 4795 4796 /** 4797 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4798 * 4799 * @hw: pointer as obtained from ieee80211_alloc_hw() 4800 * @addr: remote station's address 4801 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4802 * 4803 * Return: The station, if found. %NULL otherwise. 4804 * 4805 * Note: This function must be called under RCU lock and the 4806 * resulting pointer is only valid under RCU lock as well. 4807 * 4808 * NOTE: You may pass NULL for localaddr, but then you will just get 4809 * the first STA that matches the remote address 'addr'. 4810 * We can have multiple STA associated with multiple 4811 * logical stations (e.g. consider a station connecting to another 4812 * BSSID on the same AP hardware without disconnecting first). 4813 * In this case, the result of this method with localaddr NULL 4814 * is not reliable. 4815 * 4816 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4817 */ 4818 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4819 const u8 *addr, 4820 const u8 *localaddr); 4821 4822 /** 4823 * ieee80211_sta_block_awake - block station from waking up 4824 * @hw: the hardware 4825 * @pubsta: the station 4826 * @block: whether to block or unblock 4827 * 4828 * Some devices require that all frames that are on the queues 4829 * for a specific station that went to sleep are flushed before 4830 * a poll response or frames after the station woke up can be 4831 * delivered to that it. Note that such frames must be rejected 4832 * by the driver as filtered, with the appropriate status flag. 4833 * 4834 * This function allows implementing this mode in a race-free 4835 * manner. 4836 * 4837 * To do this, a driver must keep track of the number of frames 4838 * still enqueued for a specific station. If this number is not 4839 * zero when the station goes to sleep, the driver must call 4840 * this function to force mac80211 to consider the station to 4841 * be asleep regardless of the station's actual state. Once the 4842 * number of outstanding frames reaches zero, the driver must 4843 * call this function again to unblock the station. That will 4844 * cause mac80211 to be able to send ps-poll responses, and if 4845 * the station queried in the meantime then frames will also 4846 * be sent out as a result of this. Additionally, the driver 4847 * will be notified that the station woke up some time after 4848 * it is unblocked, regardless of whether the station actually 4849 * woke up while blocked or not. 4850 */ 4851 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4852 struct ieee80211_sta *pubsta, bool block); 4853 4854 /** 4855 * ieee80211_sta_eosp - notify mac80211 about end of SP 4856 * @pubsta: the station 4857 * 4858 * When a device transmits frames in a way that it can't tell 4859 * mac80211 in the TX status about the EOSP, it must clear the 4860 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 4861 * This applies for PS-Poll as well as uAPSD. 4862 * 4863 * Note that just like with _tx_status() and _rx() drivers must 4864 * not mix calls to irqsafe/non-irqsafe versions, this function 4865 * must not be mixed with those either. Use the all irqsafe, or 4866 * all non-irqsafe, don't mix! 4867 * 4868 * NB: the _irqsafe version of this function doesn't exist, no 4869 * driver needs it right now. Don't call this function if 4870 * you'd need the _irqsafe version, look at the git history 4871 * and restore the _irqsafe version! 4872 */ 4873 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 4874 4875 /** 4876 * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP 4877 * @pubsta: the station 4878 * @tid: the tid of the NDP 4879 * 4880 * Sometimes the device understands that it needs to close 4881 * the Service Period unexpectedly. This can happen when 4882 * sending frames that are filling holes in the BA window. 4883 * In this case, the device can ask mac80211 to send a 4884 * Nullfunc frame with EOSP set. When that happens, the 4885 * driver must have called ieee80211_sta_set_buffered() to 4886 * let mac80211 know that there are no buffered frames any 4887 * more, otherwise mac80211 will get the more_data bit wrong. 4888 * The low level driver must have made sure that the frame 4889 * will be sent despite the station being in power-save. 4890 * Mac80211 won't call allow_buffered_frames(). 4891 * Note that calling this function, doesn't exempt the driver 4892 * from closing the EOSP properly, it will still have to call 4893 * ieee80211_sta_eosp when the NDP is sent. 4894 */ 4895 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid); 4896 4897 /** 4898 * ieee80211_iter_keys - iterate keys programmed into the device 4899 * @hw: pointer obtained from ieee80211_alloc_hw() 4900 * @vif: virtual interface to iterate, may be %NULL for all 4901 * @iter: iterator function that will be called for each key 4902 * @iter_data: custom data to pass to the iterator function 4903 * 4904 * This function can be used to iterate all the keys known to 4905 * mac80211, even those that weren't previously programmed into 4906 * the device. This is intended for use in WoWLAN if the device 4907 * needs reprogramming of the keys during suspend. Note that due 4908 * to locking reasons, it is also only safe to call this at few 4909 * spots since it must hold the RTNL and be able to sleep. 4910 * 4911 * The order in which the keys are iterated matches the order 4912 * in which they were originally installed and handed to the 4913 * set_key callback. 4914 */ 4915 void ieee80211_iter_keys(struct ieee80211_hw *hw, 4916 struct ieee80211_vif *vif, 4917 void (*iter)(struct ieee80211_hw *hw, 4918 struct ieee80211_vif *vif, 4919 struct ieee80211_sta *sta, 4920 struct ieee80211_key_conf *key, 4921 void *data), 4922 void *iter_data); 4923 4924 /** 4925 * ieee80211_iter_keys_rcu - iterate keys programmed into the device 4926 * @hw: pointer obtained from ieee80211_alloc_hw() 4927 * @vif: virtual interface to iterate, may be %NULL for all 4928 * @iter: iterator function that will be called for each key 4929 * @iter_data: custom data to pass to the iterator function 4930 * 4931 * This function can be used to iterate all the keys known to 4932 * mac80211, even those that weren't previously programmed into 4933 * the device. Note that due to locking reasons, keys of station 4934 * in removal process will be skipped. 4935 * 4936 * This function requires being called in an RCU critical section, 4937 * and thus iter must be atomic. 4938 */ 4939 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, 4940 struct ieee80211_vif *vif, 4941 void (*iter)(struct ieee80211_hw *hw, 4942 struct ieee80211_vif *vif, 4943 struct ieee80211_sta *sta, 4944 struct ieee80211_key_conf *key, 4945 void *data), 4946 void *iter_data); 4947 4948 /** 4949 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 4950 * @hw: pointre obtained from ieee80211_alloc_hw(). 4951 * @iter: iterator function 4952 * @iter_data: data passed to iterator function 4953 * 4954 * Iterate all active channel contexts. This function is atomic and 4955 * doesn't acquire any locks internally that might be held in other 4956 * places while calling into the driver. 4957 * 4958 * The iterator will not find a context that's being added (during 4959 * the driver callback to add it) but will find it while it's being 4960 * removed. 4961 * 4962 * Note that during hardware restart, all contexts that existed 4963 * before the restart are considered already present so will be 4964 * found while iterating, whether they've been re-added already 4965 * or not. 4966 */ 4967 void ieee80211_iter_chan_contexts_atomic( 4968 struct ieee80211_hw *hw, 4969 void (*iter)(struct ieee80211_hw *hw, 4970 struct ieee80211_chanctx_conf *chanctx_conf, 4971 void *data), 4972 void *iter_data); 4973 4974 /** 4975 * ieee80211_ap_probereq_get - retrieve a Probe Request template 4976 * @hw: pointer obtained from ieee80211_alloc_hw(). 4977 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4978 * 4979 * Creates a Probe Request template which can, for example, be uploaded to 4980 * hardware. The template is filled with bssid, ssid and supported rate 4981 * information. This function must only be called from within the 4982 * .bss_info_changed callback function and only in managed mode. The function 4983 * is only useful when the interface is associated, otherwise it will return 4984 * %NULL. 4985 * 4986 * Return: The Probe Request template. %NULL on error. 4987 */ 4988 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4989 struct ieee80211_vif *vif); 4990 4991 /** 4992 * ieee80211_beacon_loss - inform hardware does not receive beacons 4993 * 4994 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4995 * 4996 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 4997 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 4998 * hardware is not receiving beacons with this function. 4999 */ 5000 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 5001 5002 /** 5003 * ieee80211_connection_loss - inform hardware has lost connection to the AP 5004 * 5005 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5006 * 5007 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 5008 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 5009 * needs to inform if the connection to the AP has been lost. 5010 * The function may also be called if the connection needs to be terminated 5011 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 5012 * 5013 * This function will cause immediate change to disassociated state, 5014 * without connection recovery attempts. 5015 */ 5016 void ieee80211_connection_loss(struct ieee80211_vif *vif); 5017 5018 /** 5019 * ieee80211_resume_disconnect - disconnect from AP after resume 5020 * 5021 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5022 * 5023 * Instructs mac80211 to disconnect from the AP after resume. 5024 * Drivers can use this after WoWLAN if they know that the 5025 * connection cannot be kept up, for example because keys were 5026 * used while the device was asleep but the replay counters or 5027 * similar cannot be retrieved from the device during resume. 5028 * 5029 * Note that due to implementation issues, if the driver uses 5030 * the reconfiguration functionality during resume the interface 5031 * will still be added as associated first during resume and then 5032 * disconnect normally later. 5033 * 5034 * This function can only be called from the resume callback and 5035 * the driver must not be holding any of its own locks while it 5036 * calls this function, or at least not any locks it needs in the 5037 * key configuration paths (if it supports HW crypto). 5038 */ 5039 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 5040 5041 /** 5042 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 5043 * rssi threshold triggered 5044 * 5045 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5046 * @rssi_event: the RSSI trigger event type 5047 * @gfp: context flags 5048 * 5049 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 5050 * monitoring is configured with an rssi threshold, the driver will inform 5051 * whenever the rssi level reaches the threshold. 5052 */ 5053 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5054 enum nl80211_cqm_rssi_threshold_event rssi_event, 5055 gfp_t gfp); 5056 5057 /** 5058 * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss 5059 * 5060 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5061 * @gfp: context flags 5062 */ 5063 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp); 5064 5065 /** 5066 * ieee80211_radar_detected - inform that a radar was detected 5067 * 5068 * @hw: pointer as obtained from ieee80211_alloc_hw() 5069 */ 5070 void ieee80211_radar_detected(struct ieee80211_hw *hw); 5071 5072 /** 5073 * ieee80211_chswitch_done - Complete channel switch process 5074 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5075 * @success: make the channel switch successful or not 5076 * 5077 * Complete the channel switch post-process: set the new operational channel 5078 * and wake up the suspended queues. 5079 */ 5080 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 5081 5082 /** 5083 * ieee80211_request_smps - request SM PS transition 5084 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5085 * @smps_mode: new SM PS mode 5086 * 5087 * This allows the driver to request an SM PS transition in managed 5088 * mode. This is useful when the driver has more information than 5089 * the stack about possible interference, for example by bluetooth. 5090 */ 5091 void ieee80211_request_smps(struct ieee80211_vif *vif, 5092 enum ieee80211_smps_mode smps_mode); 5093 5094 /** 5095 * ieee80211_ready_on_channel - notification of remain-on-channel start 5096 * @hw: pointer as obtained from ieee80211_alloc_hw() 5097 */ 5098 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 5099 5100 /** 5101 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 5102 * @hw: pointer as obtained from ieee80211_alloc_hw() 5103 */ 5104 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 5105 5106 /** 5107 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 5108 * 5109 * in order not to harm the system performance and user experience, the device 5110 * may request not to allow any rx ba session and tear down existing rx ba 5111 * sessions based on system constraints such as periodic BT activity that needs 5112 * to limit wlan activity (eg.sco or a2dp)." 5113 * in such cases, the intention is to limit the duration of the rx ppdu and 5114 * therefore prevent the peer device to use a-mpdu aggregation. 5115 * 5116 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5117 * @ba_rx_bitmap: Bit map of open rx ba per tid 5118 * @addr: & to bssid mac address 5119 */ 5120 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 5121 const u8 *addr); 5122 5123 /** 5124 * ieee80211_send_bar - send a BlockAckReq frame 5125 * 5126 * can be used to flush pending frames from the peer's aggregation reorder 5127 * buffer. 5128 * 5129 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5130 * @ra: the peer's destination address 5131 * @tid: the TID of the aggregation session 5132 * @ssn: the new starting sequence number for the receiver 5133 */ 5134 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 5135 5136 /** 5137 * ieee80211_start_rx_ba_session_offl - start a Rx BA session 5138 * 5139 * Some device drivers may offload part of the Rx aggregation flow including 5140 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5141 * reordering. 5142 * 5143 * Create structures responsible for reordering so device drivers may call here 5144 * when they complete AddBa negotiation. 5145 * 5146 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5147 * @addr: station mac address 5148 * @tid: the rx tid 5149 */ 5150 void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, 5151 const u8 *addr, u16 tid); 5152 5153 /** 5154 * ieee80211_stop_rx_ba_session_offl - stop a Rx BA session 5155 * 5156 * Some device drivers may offload part of the Rx aggregation flow including 5157 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5158 * reordering. 5159 * 5160 * Destroy structures responsible for reordering so device drivers may call here 5161 * when they complete DelBa negotiation. 5162 * 5163 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5164 * @addr: station mac address 5165 * @tid: the rx tid 5166 */ 5167 void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, 5168 const u8 *addr, u16 tid); 5169 5170 /* Rate control API */ 5171 5172 /** 5173 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 5174 * 5175 * @hw: The hardware the algorithm is invoked for. 5176 * @sband: The band this frame is being transmitted on. 5177 * @bss_conf: the current BSS configuration 5178 * @skb: the skb that will be transmitted, the control information in it needs 5179 * to be filled in 5180 * @reported_rate: The rate control algorithm can fill this in to indicate 5181 * which rate should be reported to userspace as the current rate and 5182 * used for rate calculations in the mesh network. 5183 * @rts: whether RTS will be used for this frame because it is longer than the 5184 * RTS threshold 5185 * @short_preamble: whether mac80211 will request short-preamble transmission 5186 * if the selected rate supports it 5187 * @max_rate_idx: user-requested maximum (legacy) rate 5188 * (deprecated; this will be removed once drivers get updated to use 5189 * rate_idx_mask) 5190 * @rate_idx_mask: user-requested (legacy) rate mask 5191 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 5192 * @bss: whether this frame is sent out in AP or IBSS mode 5193 */ 5194 struct ieee80211_tx_rate_control { 5195 struct ieee80211_hw *hw; 5196 struct ieee80211_supported_band *sband; 5197 struct ieee80211_bss_conf *bss_conf; 5198 struct sk_buff *skb; 5199 struct ieee80211_tx_rate reported_rate; 5200 bool rts, short_preamble; 5201 u8 max_rate_idx; 5202 u32 rate_idx_mask; 5203 u8 *rate_idx_mcs_mask; 5204 bool bss; 5205 }; 5206 5207 struct rate_control_ops { 5208 const char *name; 5209 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 5210 void (*free)(void *priv); 5211 5212 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 5213 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 5214 struct cfg80211_chan_def *chandef, 5215 struct ieee80211_sta *sta, void *priv_sta); 5216 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 5217 struct cfg80211_chan_def *chandef, 5218 struct ieee80211_sta *sta, void *priv_sta, 5219 u32 changed); 5220 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 5221 void *priv_sta); 5222 5223 void (*tx_status_noskb)(void *priv, 5224 struct ieee80211_supported_band *sband, 5225 struct ieee80211_sta *sta, void *priv_sta, 5226 struct ieee80211_tx_info *info); 5227 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 5228 struct ieee80211_sta *sta, void *priv_sta, 5229 struct sk_buff *skb); 5230 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 5231 struct ieee80211_tx_rate_control *txrc); 5232 5233 void (*add_sta_debugfs)(void *priv, void *priv_sta, 5234 struct dentry *dir); 5235 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 5236 5237 u32 (*get_expected_throughput)(void *priv_sta); 5238 }; 5239 5240 static inline int rate_supported(struct ieee80211_sta *sta, 5241 enum ieee80211_band band, 5242 int index) 5243 { 5244 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 5245 } 5246 5247 /** 5248 * rate_control_send_low - helper for drivers for management/no-ack frames 5249 * 5250 * Rate control algorithms that agree to use the lowest rate to 5251 * send management frames and NO_ACK data with the respective hw 5252 * retries should use this in the beginning of their mac80211 get_rate 5253 * callback. If true is returned the rate control can simply return. 5254 * If false is returned we guarantee that sta and sta and priv_sta is 5255 * not null. 5256 * 5257 * Rate control algorithms wishing to do more intelligent selection of 5258 * rate for multicast/broadcast frames may choose to not use this. 5259 * 5260 * @sta: &struct ieee80211_sta pointer to the target destination. Note 5261 * that this may be null. 5262 * @priv_sta: private rate control structure. This may be null. 5263 * @txrc: rate control information we sholud populate for mac80211. 5264 */ 5265 bool rate_control_send_low(struct ieee80211_sta *sta, 5266 void *priv_sta, 5267 struct ieee80211_tx_rate_control *txrc); 5268 5269 5270 static inline s8 5271 rate_lowest_index(struct ieee80211_supported_band *sband, 5272 struct ieee80211_sta *sta) 5273 { 5274 int i; 5275 5276 for (i = 0; i < sband->n_bitrates; i++) 5277 if (rate_supported(sta, sband->band, i)) 5278 return i; 5279 5280 /* warn when we cannot find a rate. */ 5281 WARN_ON_ONCE(1); 5282 5283 /* and return 0 (the lowest index) */ 5284 return 0; 5285 } 5286 5287 static inline 5288 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 5289 struct ieee80211_sta *sta) 5290 { 5291 unsigned int i; 5292 5293 for (i = 0; i < sband->n_bitrates; i++) 5294 if (rate_supported(sta, sband->band, i)) 5295 return true; 5296 return false; 5297 } 5298 5299 /** 5300 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 5301 * 5302 * When not doing a rate control probe to test rates, rate control should pass 5303 * its rate selection to mac80211. If the driver supports receiving a station 5304 * rate table, it will use it to ensure that frames are always sent based on 5305 * the most recent rate control module decision. 5306 * 5307 * @hw: pointer as obtained from ieee80211_alloc_hw() 5308 * @pubsta: &struct ieee80211_sta pointer to the target destination. 5309 * @rates: new tx rate set to be used for this station. 5310 */ 5311 int rate_control_set_rates(struct ieee80211_hw *hw, 5312 struct ieee80211_sta *pubsta, 5313 struct ieee80211_sta_rates *rates); 5314 5315 int ieee80211_rate_control_register(const struct rate_control_ops *ops); 5316 void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 5317 5318 static inline bool 5319 conf_is_ht20(struct ieee80211_conf *conf) 5320 { 5321 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 5322 } 5323 5324 static inline bool 5325 conf_is_ht40_minus(struct ieee80211_conf *conf) 5326 { 5327 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5328 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 5329 } 5330 5331 static inline bool 5332 conf_is_ht40_plus(struct ieee80211_conf *conf) 5333 { 5334 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5335 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 5336 } 5337 5338 static inline bool 5339 conf_is_ht40(struct ieee80211_conf *conf) 5340 { 5341 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 5342 } 5343 5344 static inline bool 5345 conf_is_ht(struct ieee80211_conf *conf) 5346 { 5347 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) && 5348 (conf->chandef.width != NL80211_CHAN_WIDTH_10) && 5349 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT); 5350 } 5351 5352 static inline enum nl80211_iftype 5353 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 5354 { 5355 if (p2p) { 5356 switch (type) { 5357 case NL80211_IFTYPE_STATION: 5358 return NL80211_IFTYPE_P2P_CLIENT; 5359 case NL80211_IFTYPE_AP: 5360 return NL80211_IFTYPE_P2P_GO; 5361 default: 5362 break; 5363 } 5364 } 5365 return type; 5366 } 5367 5368 static inline enum nl80211_iftype 5369 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 5370 { 5371 return ieee80211_iftype_p2p(vif->type, vif->p2p); 5372 } 5373 5374 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 5375 int rssi_min_thold, 5376 int rssi_max_thold); 5377 5378 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 5379 5380 /** 5381 * ieee80211_ave_rssi - report the average RSSI for the specified interface 5382 * 5383 * @vif: the specified virtual interface 5384 * 5385 * Note: This function assumes that the given vif is valid. 5386 * 5387 * Return: The average RSSI value for the requested interface, or 0 if not 5388 * applicable. 5389 */ 5390 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 5391 5392 /** 5393 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 5394 * @vif: virtual interface 5395 * @wakeup: wakeup reason(s) 5396 * @gfp: allocation flags 5397 * 5398 * See cfg80211_report_wowlan_wakeup(). 5399 */ 5400 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 5401 struct cfg80211_wowlan_wakeup *wakeup, 5402 gfp_t gfp); 5403 5404 /** 5405 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 5406 * @hw: pointer as obtained from ieee80211_alloc_hw() 5407 * @vif: virtual interface 5408 * @skb: frame to be sent from within the driver 5409 * @band: the band to transmit on 5410 * @sta: optional pointer to get the station to send the frame to 5411 * 5412 * Note: must be called under RCU lock 5413 */ 5414 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 5415 struct ieee80211_vif *vif, struct sk_buff *skb, 5416 int band, struct ieee80211_sta **sta); 5417 5418 /** 5419 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 5420 * 5421 * @next_tsf: TSF timestamp of the next absent state change 5422 * @has_next_tsf: next absent state change event pending 5423 * 5424 * @absent: descriptor bitmask, set if GO is currently absent 5425 * 5426 * private: 5427 * 5428 * @count: count fields from the NoA descriptors 5429 * @desc: adjusted data from the NoA 5430 */ 5431 struct ieee80211_noa_data { 5432 u32 next_tsf; 5433 bool has_next_tsf; 5434 5435 u8 absent; 5436 5437 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 5438 struct { 5439 u32 start; 5440 u32 duration; 5441 u32 interval; 5442 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 5443 }; 5444 5445 /** 5446 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 5447 * 5448 * @attr: P2P NoA IE 5449 * @data: NoA tracking data 5450 * @tsf: current TSF timestamp 5451 * 5452 * Return: number of successfully parsed descriptors 5453 */ 5454 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 5455 struct ieee80211_noa_data *data, u32 tsf); 5456 5457 /** 5458 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 5459 * 5460 * @data: NoA tracking data 5461 * @tsf: current TSF timestamp 5462 */ 5463 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 5464 5465 /** 5466 * ieee80211_tdls_oper - request userspace to perform a TDLS operation 5467 * @vif: virtual interface 5468 * @peer: the peer's destination address 5469 * @oper: the requested TDLS operation 5470 * @reason_code: reason code for the operation, valid for TDLS teardown 5471 * @gfp: allocation flags 5472 * 5473 * See cfg80211_tdls_oper_request(). 5474 */ 5475 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, 5476 enum nl80211_tdls_operation oper, 5477 u16 reason_code, gfp_t gfp); 5478 5479 /** 5480 * ieee80211_reserve_tid - request to reserve a specific TID 5481 * 5482 * There is sometimes a need (such as in TDLS) for blocking the driver from 5483 * using a specific TID so that the FW can use it for certain operations such 5484 * as sending PTI requests. To make sure that the driver doesn't use that TID, 5485 * this function must be called as it flushes out packets on this TID and marks 5486 * it as blocked, so that any transmit for the station on this TID will be 5487 * redirected to the alternative TID in the same AC. 5488 * 5489 * Note that this function blocks and may call back into the driver, so it 5490 * should be called without driver locks held. Also note this function should 5491 * only be called from the driver's @sta_state callback. 5492 * 5493 * @sta: the station to reserve the TID for 5494 * @tid: the TID to reserve 5495 * 5496 * Returns: 0 on success, else on failure 5497 */ 5498 int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid); 5499 5500 /** 5501 * ieee80211_unreserve_tid - request to unreserve a specific TID 5502 * 5503 * Once there is no longer any need for reserving a certain TID, this function 5504 * should be called, and no longer will packets have their TID modified for 5505 * preventing use of this TID in the driver. 5506 * 5507 * Note that this function blocks and acquires a lock, so it should be called 5508 * without driver locks held. Also note this function should only be called 5509 * from the driver's @sta_state callback. 5510 * 5511 * @sta: the station 5512 * @tid: the TID to unreserve 5513 */ 5514 void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid); 5515 5516 /** 5517 * ieee80211_tx_dequeue - dequeue a packet from a software tx queue 5518 * 5519 * @hw: pointer as obtained from ieee80211_alloc_hw() 5520 * @txq: pointer obtained from station or virtual interface 5521 * 5522 * Returns the skb if successful, %NULL if no frame was available. 5523 */ 5524 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, 5525 struct ieee80211_txq *txq); 5526 #endif /* MAC80211_H */ 5527