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 - 2016 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 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 * @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed 302 */ 303 enum ieee80211_bss_change { 304 BSS_CHANGED_ASSOC = 1<<0, 305 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 306 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 307 BSS_CHANGED_ERP_SLOT = 1<<3, 308 BSS_CHANGED_HT = 1<<4, 309 BSS_CHANGED_BASIC_RATES = 1<<5, 310 BSS_CHANGED_BEACON_INT = 1<<6, 311 BSS_CHANGED_BSSID = 1<<7, 312 BSS_CHANGED_BEACON = 1<<8, 313 BSS_CHANGED_BEACON_ENABLED = 1<<9, 314 BSS_CHANGED_CQM = 1<<10, 315 BSS_CHANGED_IBSS = 1<<11, 316 BSS_CHANGED_ARP_FILTER = 1<<12, 317 BSS_CHANGED_QOS = 1<<13, 318 BSS_CHANGED_IDLE = 1<<14, 319 BSS_CHANGED_SSID = 1<<15, 320 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 321 BSS_CHANGED_PS = 1<<17, 322 BSS_CHANGED_TXPOWER = 1<<18, 323 BSS_CHANGED_P2P_PS = 1<<19, 324 BSS_CHANGED_BEACON_INFO = 1<<20, 325 BSS_CHANGED_BANDWIDTH = 1<<21, 326 BSS_CHANGED_OCB = 1<<22, 327 BSS_CHANGED_MU_GROUPS = 1<<23, 328 329 /* when adding here, make sure to change ieee80211_reconfig */ 330 }; 331 332 /* 333 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 334 * of addresses for an interface increase beyond this value, hardware ARP 335 * filtering will be disabled. 336 */ 337 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 338 339 /** 340 * enum ieee80211_event_type - event to be notified to the low level driver 341 * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver. 342 * @MLME_EVENT: event related to MLME 343 * @BAR_RX_EVENT: a BAR was received 344 * @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because 345 * they timed out. This won't be called for each frame released, but only 346 * once each time the timeout triggers. 347 */ 348 enum ieee80211_event_type { 349 RSSI_EVENT, 350 MLME_EVENT, 351 BAR_RX_EVENT, 352 BA_FRAME_TIMEOUT, 353 }; 354 355 /** 356 * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT 357 * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver. 358 * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver. 359 */ 360 enum ieee80211_rssi_event_data { 361 RSSI_EVENT_HIGH, 362 RSSI_EVENT_LOW, 363 }; 364 365 /** 366 * struct ieee80211_rssi_event - data attached to an %RSSI_EVENT 367 * @data: See &enum ieee80211_rssi_event_data 368 */ 369 struct ieee80211_rssi_event { 370 enum ieee80211_rssi_event_data data; 371 }; 372 373 /** 374 * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT 375 * @AUTH_EVENT: the MLME operation is authentication 376 * @ASSOC_EVENT: the MLME operation is association 377 * @DEAUTH_RX_EVENT: deauth received.. 378 * @DEAUTH_TX_EVENT: deauth sent. 379 */ 380 enum ieee80211_mlme_event_data { 381 AUTH_EVENT, 382 ASSOC_EVENT, 383 DEAUTH_RX_EVENT, 384 DEAUTH_TX_EVENT, 385 }; 386 387 /** 388 * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT 389 * @MLME_SUCCESS: the MLME operation completed successfully. 390 * @MLME_DENIED: the MLME operation was denied by the peer. 391 * @MLME_TIMEOUT: the MLME operation timed out. 392 */ 393 enum ieee80211_mlme_event_status { 394 MLME_SUCCESS, 395 MLME_DENIED, 396 MLME_TIMEOUT, 397 }; 398 399 /** 400 * struct ieee80211_mlme_event - data attached to an %MLME_EVENT 401 * @data: See &enum ieee80211_mlme_event_data 402 * @status: See &enum ieee80211_mlme_event_status 403 * @reason: the reason code if applicable 404 */ 405 struct ieee80211_mlme_event { 406 enum ieee80211_mlme_event_data data; 407 enum ieee80211_mlme_event_status status; 408 u16 reason; 409 }; 410 411 /** 412 * struct ieee80211_ba_event - data attached for BlockAck related events 413 * @sta: pointer to the &ieee80211_sta to which this event relates 414 * @tid: the tid 415 * @ssn: the starting sequence number (for %BAR_RX_EVENT) 416 */ 417 struct ieee80211_ba_event { 418 struct ieee80211_sta *sta; 419 u16 tid; 420 u16 ssn; 421 }; 422 423 /** 424 * struct ieee80211_event - event to be sent to the driver 425 * @type: The event itself. See &enum ieee80211_event_type. 426 * @rssi: relevant if &type is %RSSI_EVENT 427 * @mlme: relevant if &type is %AUTH_EVENT 428 * @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT 429 * @u:union holding the fields above 430 */ 431 struct ieee80211_event { 432 enum ieee80211_event_type type; 433 union { 434 struct ieee80211_rssi_event rssi; 435 struct ieee80211_mlme_event mlme; 436 struct ieee80211_ba_event ba; 437 } u; 438 }; 439 440 /** 441 * struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data 442 * 443 * This structure describes the group id data of VHT MU-MIMO 444 * 445 * @membership: 64 bits array - a bit is set if station is member of the group 446 * @position: 2 bits per group id indicating the position in the group 447 */ 448 struct ieee80211_mu_group_data { 449 u8 membership[WLAN_MEMBERSHIP_LEN]; 450 u8 position[WLAN_USER_POSITION_LEN]; 451 }; 452 453 /** 454 * struct ieee80211_bss_conf - holds the BSS's changing parameters 455 * 456 * This structure keeps information about a BSS (and an association 457 * to that BSS) that can change during the lifetime of the BSS. 458 * 459 * @assoc: association status 460 * @ibss_joined: indicates whether this station is part of an IBSS 461 * or not 462 * @ibss_creator: indicates if a new IBSS network is being created 463 * @aid: association ID number, valid only when @assoc is true 464 * @use_cts_prot: use CTS protection 465 * @use_short_preamble: use 802.11b short preamble 466 * @use_short_slot: use short slot time (only relevant for ERP) 467 * @dtim_period: num of beacons before the next DTIM, for beaconing, 468 * valid in station mode only if after the driver was notified 469 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 470 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 471 * as it may have been received during scanning long ago). If the 472 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 473 * only come from a beacon, but might not become valid until after 474 * association when a beacon is received (which is notified with the 475 * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice. 476 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 477 * the driver/device can use this to calculate synchronisation 478 * (see @sync_tsf). See also sync_dtim_count important notice. 479 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 480 * is requested, see @sync_tsf/@sync_device_ts. 481 * IMPORTANT: These three sync_* parameters would possibly be out of sync 482 * by the time the driver will use them. The synchronized view is currently 483 * guaranteed only in certain callbacks. 484 * @beacon_int: beacon interval 485 * @assoc_capability: capabilities taken from assoc resp 486 * @basic_rates: bitmap of basic rates, each bit stands for an 487 * index into the rate table configured by the driver in 488 * the current band. 489 * @beacon_rate: associated AP's beacon TX rate 490 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 491 * @bssid: The BSSID for this BSS 492 * @enable_beacon: whether beaconing should be enabled or not 493 * @chandef: Channel definition for this BSS -- the hardware might be 494 * configured a higher bandwidth than this BSS uses, for example. 495 * @mu_group: VHT MU-MIMO group membership data 496 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 497 * This field is only valid when the channel is a wide HT/VHT channel. 498 * Note that with TDLS this can be the case (channel is HT, protection must 499 * be used from this field) even when the BSS association isn't using HT. 500 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 501 * implies disabled. As with the cfg80211 callback, a change here should 502 * cause an event to be sent indicating where the current value is in 503 * relation to the newly configured threshold. 504 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 505 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 506 * may filter ARP queries targeted for other addresses than listed here. 507 * The driver must allow ARP queries targeted for all address listed here 508 * to pass through. An empty list implies no ARP queries need to pass. 509 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 510 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 511 * array size), it's up to the driver what to do in that case. 512 * @qos: This is a QoS-enabled BSS. 513 * @idle: This interface is idle. There's also a global idle flag in the 514 * hardware config which may be more appropriate depending on what 515 * your driver/device needs to do. 516 * @ps: power-save mode (STA only). This flag is NOT affected by 517 * offchannel/dynamic_ps operations. 518 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 519 * @ssid_len: Length of SSID given in @ssid. 520 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 521 * @txpower: TX power in dBm 522 * @txpower_type: TX power adjustment used to control per packet Transmit 523 * Power Control (TPC) in lower driver for the current vif. In particular 524 * TPC is enabled if value passed in %txpower_type is 525 * NL80211_TX_POWER_LIMITED (allow using less than specified from 526 * userspace), whereas TPC is disabled if %txpower_type is set to 527 * NL80211_TX_POWER_FIXED (use value configured from userspace) 528 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 529 * @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed 530 * to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS 531 * if it has associated clients without P2P PS support. 532 */ 533 struct ieee80211_bss_conf { 534 const u8 *bssid; 535 /* association related data */ 536 bool assoc, ibss_joined; 537 bool ibss_creator; 538 u16 aid; 539 /* erp related data */ 540 bool use_cts_prot; 541 bool use_short_preamble; 542 bool use_short_slot; 543 bool enable_beacon; 544 u8 dtim_period; 545 u16 beacon_int; 546 u16 assoc_capability; 547 u64 sync_tsf; 548 u32 sync_device_ts; 549 u8 sync_dtim_count; 550 u32 basic_rates; 551 struct ieee80211_rate *beacon_rate; 552 int mcast_rate[NUM_NL80211_BANDS]; 553 u16 ht_operation_mode; 554 s32 cqm_rssi_thold; 555 u32 cqm_rssi_hyst; 556 struct cfg80211_chan_def chandef; 557 struct ieee80211_mu_group_data mu_group; 558 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 559 int arp_addr_cnt; 560 bool qos; 561 bool idle; 562 bool ps; 563 u8 ssid[IEEE80211_MAX_SSID_LEN]; 564 size_t ssid_len; 565 bool hidden_ssid; 566 int txpower; 567 enum nl80211_tx_power_setting txpower_type; 568 struct ieee80211_p2p_noa_attr p2p_noa_attr; 569 bool allow_p2p_go_ps; 570 }; 571 572 /** 573 * enum mac80211_tx_info_flags - flags to describe transmission information/status 574 * 575 * These flags are used with the @flags member of &ieee80211_tx_info. 576 * 577 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 578 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 579 * number to this frame, taking care of not overwriting the fragment 580 * number and increasing the sequence number only when the 581 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 582 * assign sequence numbers to QoS-data frames but cannot do so correctly 583 * for non-QoS-data and management frames because beacons need them from 584 * that counter as well and mac80211 cannot guarantee proper sequencing. 585 * If this flag is set, the driver should instruct the hardware to 586 * assign a sequence number to the frame or assign one itself. Cf. IEEE 587 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 588 * beacons and always be clear for frames without a sequence number field. 589 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 590 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 591 * station 592 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 593 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 594 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 595 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 596 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 597 * because the destination STA was in powersave mode. Note that to 598 * avoid race conditions, the filter must be set by the hardware or 599 * firmware upon receiving a frame that indicates that the station 600 * went to sleep (must be done on device to filter frames already on 601 * the queue) and may only be unset after mac80211 gives the OK for 602 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 603 * since only then is it guaranteed that no more frames are in the 604 * hardware queue. 605 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 606 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 607 * is for the whole aggregation. 608 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 609 * so consider using block ack request (BAR). 610 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 611 * set by rate control algorithms to indicate probe rate, will 612 * be cleared for fragmented frames (except on the last fragment) 613 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 614 * that a frame can be transmitted while the queues are stopped for 615 * off-channel operation. 616 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 617 * used to indicate that a pending frame requires TX processing before 618 * it can be sent out. 619 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 620 * used to indicate that a frame was already retried due to PS 621 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 622 * used to indicate frame should not be encrypted 623 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 624 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 625 * be sent although the station is in powersave mode. 626 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 627 * transmit function after the current frame, this can be used 628 * by drivers to kick the DMA queue only if unset or when the 629 * queue gets full. 630 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 631 * after TX status because the destination was asleep, it must not 632 * be modified again (no seqno assignment, crypto, etc.) 633 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 634 * code for connection establishment, this indicates that its status 635 * should kick the MLME state machine. 636 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 637 * MLME command (internal to mac80211 to figure out whether to send TX 638 * status to user space) 639 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 640 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 641 * frame and selects the maximum number of streams that it can use. 642 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 643 * the off-channel channel when a remain-on-channel offload is done 644 * in hardware -- normal packets still flow and are expected to be 645 * handled properly by the device. 646 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 647 * testing. It will be sent out with incorrect Michael MIC key to allow 648 * TKIP countermeasures to be tested. 649 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 650 * This flag is actually used for management frame especially for P2P 651 * frames not being sent at CCK rate in 2GHz band. 652 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 653 * when its status is reported the service period ends. For frames in 654 * an SP that mac80211 transmits, it is already set; for driver frames 655 * the driver may set this flag. It is also used to do the same for 656 * PS-Poll responses. 657 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 658 * This flag is used to send nullfunc frame at minimum rate when 659 * the nullfunc is used for connection monitoring purpose. 660 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 661 * would be fragmented by size (this is optional, only used for 662 * monitor injection). 663 * @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with 664 * IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without 665 * any errors (like issues specific to the driver/HW). 666 * This flag must not be set for frames that don't request no-ack 667 * behaviour with IEEE80211_TX_CTL_NO_ACK. 668 * 669 * Note: If you have to add new flags to the enumeration, then don't 670 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 671 */ 672 enum mac80211_tx_info_flags { 673 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 674 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 675 IEEE80211_TX_CTL_NO_ACK = BIT(2), 676 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 677 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 678 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 679 IEEE80211_TX_CTL_AMPDU = BIT(6), 680 IEEE80211_TX_CTL_INJECTED = BIT(7), 681 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 682 IEEE80211_TX_STAT_ACK = BIT(9), 683 IEEE80211_TX_STAT_AMPDU = BIT(10), 684 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 685 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 686 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 687 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 688 IEEE80211_TX_INTFL_RETRIED = BIT(15), 689 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 690 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 691 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 692 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 693 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 694 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 695 IEEE80211_TX_CTL_LDPC = BIT(22), 696 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 697 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 698 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 699 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 700 IEEE80211_TX_STATUS_EOSP = BIT(28), 701 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 702 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 703 IEEE80211_TX_STAT_NOACK_TRANSMITTED = BIT(31), 704 }; 705 706 #define IEEE80211_TX_CTL_STBC_SHIFT 23 707 708 /** 709 * enum mac80211_tx_control_flags - flags to describe transmit control 710 * 711 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 712 * protocol frame (e.g. EAP) 713 * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll 714 * frame (PS-Poll or uAPSD). 715 * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information 716 * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame 717 * 718 * These flags are used in tx_info->control.flags. 719 */ 720 enum mac80211_tx_control_flags { 721 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 722 IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1), 723 IEEE80211_TX_CTRL_RATE_INJECT = BIT(2), 724 IEEE80211_TX_CTRL_AMSDU = BIT(3), 725 }; 726 727 /* 728 * This definition is used as a mask to clear all temporary flags, which are 729 * set by the tx handlers for each transmission attempt by the mac80211 stack. 730 */ 731 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 732 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 733 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 734 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 735 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 736 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 737 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 738 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 739 740 /** 741 * enum mac80211_rate_control_flags - per-rate flags set by the 742 * Rate Control algorithm. 743 * 744 * These flags are set by the Rate control algorithm for each rate during tx, 745 * in the @flags member of struct ieee80211_tx_rate. 746 * 747 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 748 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 749 * This is set if the current BSS requires ERP protection. 750 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 751 * @IEEE80211_TX_RC_MCS: HT rate. 752 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 753 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 754 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 755 * Greenfield mode. 756 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 757 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 758 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 759 * (80+80 isn't supported yet) 760 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 761 * adjacent 20 MHz channels, if the current channel type is 762 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 763 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 764 */ 765 enum mac80211_rate_control_flags { 766 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 767 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 768 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 769 770 /* rate index is an HT/VHT MCS instead of an index */ 771 IEEE80211_TX_RC_MCS = BIT(3), 772 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 773 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 774 IEEE80211_TX_RC_DUP_DATA = BIT(6), 775 IEEE80211_TX_RC_SHORT_GI = BIT(7), 776 IEEE80211_TX_RC_VHT_MCS = BIT(8), 777 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 778 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 779 }; 780 781 782 /* there are 40 bytes if you don't need the rateset to be kept */ 783 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 784 785 /* if you do need the rateset, then you have less space */ 786 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 787 788 /* maximum number of rate stages */ 789 #define IEEE80211_TX_MAX_RATES 4 790 791 /* maximum number of rate table entries */ 792 #define IEEE80211_TX_RATE_TABLE_SIZE 4 793 794 /** 795 * struct ieee80211_tx_rate - rate selection/status 796 * 797 * @idx: rate index to attempt to send with 798 * @flags: rate control flags (&enum mac80211_rate_control_flags) 799 * @count: number of tries in this rate before going to the next rate 800 * 801 * A value of -1 for @idx indicates an invalid rate and, if used 802 * in an array of retry rates, that no more rates should be tried. 803 * 804 * When used for transmit status reporting, the driver should 805 * always report the rate along with the flags it used. 806 * 807 * &struct ieee80211_tx_info contains an array of these structs 808 * in the control information, and it will be filled by the rate 809 * control algorithm according to what should be sent. For example, 810 * if this array contains, in the format { <idx>, <count> } the 811 * information 812 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 813 * then this means that the frame should be transmitted 814 * up to twice at rate 3, up to twice at rate 2, and up to four 815 * times at rate 1 if it doesn't get acknowledged. Say it gets 816 * acknowledged by the peer after the fifth attempt, the status 817 * information should then contain 818 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 819 * since it was transmitted twice at rate 3, twice at rate 2 820 * and once at rate 1 after which we received an acknowledgement. 821 */ 822 struct ieee80211_tx_rate { 823 s8 idx; 824 u16 count:5, 825 flags:11; 826 } __packed; 827 828 #define IEEE80211_MAX_TX_RETRY 31 829 830 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 831 u8 mcs, u8 nss) 832 { 833 WARN_ON(mcs & ~0xF); 834 WARN_ON((nss - 1) & ~0x7); 835 rate->idx = ((nss - 1) << 4) | mcs; 836 } 837 838 static inline u8 839 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 840 { 841 return rate->idx & 0xF; 842 } 843 844 static inline u8 845 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 846 { 847 return (rate->idx >> 4) + 1; 848 } 849 850 /** 851 * struct ieee80211_tx_info - skb transmit information 852 * 853 * This structure is placed in skb->cb for three uses: 854 * (1) mac80211 TX control - mac80211 tells the driver what to do 855 * (2) driver internal use (if applicable) 856 * (3) TX status information - driver tells mac80211 what happened 857 * 858 * @flags: transmit info flags, defined above 859 * @band: the band to transmit on (use for checking for races) 860 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 861 * @ack_frame_id: internal frame ID for TX status, used internally 862 * @control: union for control data 863 * @status: union for status data 864 * @driver_data: array of driver_data pointers 865 * @ampdu_ack_len: number of acked aggregated frames. 866 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 867 * @ampdu_len: number of aggregated frames. 868 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 869 * @ack_signal: signal strength of the ACK frame 870 */ 871 struct ieee80211_tx_info { 872 /* common information */ 873 u32 flags; 874 u8 band; 875 876 u8 hw_queue; 877 878 u16 ack_frame_id; 879 880 union { 881 struct { 882 union { 883 /* rate control */ 884 struct { 885 struct ieee80211_tx_rate rates[ 886 IEEE80211_TX_MAX_RATES]; 887 s8 rts_cts_rate_idx; 888 u8 use_rts:1; 889 u8 use_cts_prot:1; 890 u8 short_preamble:1; 891 u8 skip_table:1; 892 /* 2 bytes free */ 893 }; 894 /* only needed before rate control */ 895 unsigned long jiffies; 896 }; 897 /* NB: vif can be NULL for injected frames */ 898 struct ieee80211_vif *vif; 899 struct ieee80211_key_conf *hw_key; 900 u32 flags; 901 /* 4 bytes free */ 902 } control; 903 struct { 904 u64 cookie; 905 } ack; 906 struct { 907 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 908 s32 ack_signal; 909 u8 ampdu_ack_len; 910 u8 ampdu_len; 911 u8 antenna; 912 u16 tx_time; 913 void *status_driver_data[19 / sizeof(void *)]; 914 } status; 915 struct { 916 struct ieee80211_tx_rate driver_rates[ 917 IEEE80211_TX_MAX_RATES]; 918 u8 pad[4]; 919 920 void *rate_driver_data[ 921 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 922 }; 923 void *driver_data[ 924 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 925 }; 926 }; 927 928 /** 929 * struct ieee80211_scan_ies - descriptors for different blocks of IEs 930 * 931 * This structure is used to point to different blocks of IEs in HW scan 932 * and scheduled scan. These blocks contain the IEs passed by userspace 933 * and the ones generated by mac80211. 934 * 935 * @ies: pointers to band specific IEs. 936 * @len: lengths of band_specific IEs. 937 * @common_ies: IEs for all bands (especially vendor specific ones) 938 * @common_ie_len: length of the common_ies 939 */ 940 struct ieee80211_scan_ies { 941 const u8 *ies[NUM_NL80211_BANDS]; 942 size_t len[NUM_NL80211_BANDS]; 943 const u8 *common_ies; 944 size_t common_ie_len; 945 }; 946 947 948 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 949 { 950 return (struct ieee80211_tx_info *)skb->cb; 951 } 952 953 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 954 { 955 return (struct ieee80211_rx_status *)skb->cb; 956 } 957 958 /** 959 * ieee80211_tx_info_clear_status - clear TX status 960 * 961 * @info: The &struct ieee80211_tx_info to be cleared. 962 * 963 * When the driver passes an skb back to mac80211, it must report 964 * a number of things in TX status. This function clears everything 965 * in the TX status but the rate control information (it does clear 966 * the count since you need to fill that in anyway). 967 * 968 * NOTE: You can only use this function if you do NOT use 969 * info->driver_data! Use info->rate_driver_data 970 * instead if you need only the less space that allows. 971 */ 972 static inline void 973 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 974 { 975 int i; 976 977 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 978 offsetof(struct ieee80211_tx_info, control.rates)); 979 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 980 offsetof(struct ieee80211_tx_info, driver_rates)); 981 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 982 /* clear the rate counts */ 983 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 984 info->status.rates[i].count = 0; 985 986 BUILD_BUG_ON( 987 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 988 memset(&info->status.ampdu_ack_len, 0, 989 sizeof(struct ieee80211_tx_info) - 990 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 991 } 992 993 994 /** 995 * enum mac80211_rx_flags - receive flags 996 * 997 * These flags are used with the @flag member of &struct ieee80211_rx_status. 998 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 999 * Use together with %RX_FLAG_MMIC_STRIPPED. 1000 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 1001 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 1002 * verification has been done by the hardware. 1003 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 1004 * If this flag is set, the stack cannot do any replay detection 1005 * hence the driver or hardware will have to do that. 1006 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this 1007 * flag indicates that the PN was verified for replay protection. 1008 * Note that this flag is also currently only supported when a frame 1009 * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set) 1010 * @RX_FLAG_DUP_VALIDATED: The driver should set this flag if it did 1011 * de-duplication by itself. 1012 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 1013 * the frame. 1014 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 1015 * the frame. 1016 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 1017 * field) is valid and contains the time the first symbol of the MPDU 1018 * was received. This is useful in monitor mode and for proper IBSS 1019 * merging. 1020 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 1021 * field) is valid and contains the time the last symbol of the MPDU 1022 * (including FCS) was received. 1023 * @RX_FLAG_MACTIME_PLCP_START: The timestamp passed in the RX status (@mactime 1024 * field) is valid and contains the time the SYNC preamble was received. 1025 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 1026 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 1027 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 1028 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 1029 * @RX_FLAG_SHORT_GI: Short guard interval was used 1030 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 1031 * Valid only for data frames (mainly A-MPDU) 1032 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 1033 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 1034 * to hw.radiotap_mcs_details to advertise that fact 1035 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 1036 * number (@ampdu_reference) must be populated and be a distinct number for 1037 * each A-MPDU 1038 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 1039 * subframes of a single A-MPDU 1040 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 1041 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 1042 * on this subframe 1043 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 1044 * is stored in the @ampdu_delimiter_crc field) 1045 * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was 1046 * done by the hardware 1047 * @RX_FLAG_LDPC: LDPC was used 1048 * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without 1049 * processing it in any regular way. 1050 * This is useful if drivers offload some frames but still want to report 1051 * them for sniffing purposes. 1052 * @RX_FLAG_SKIP_MONITOR: Process and report frame to all interfaces except 1053 * monitor interfaces. 1054 * This is useful if drivers offload some frames but still want to report 1055 * them for sniffing purposes. 1056 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 1057 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 1058 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 1059 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 1060 * subframes instead of a one huge frame for performance reasons. 1061 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 1062 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 1063 * the 3rd (last) one must not have this flag set. The flag is used to 1064 * deal with retransmission/duplication recovery properly since A-MSDU 1065 * subframes share the same sequence number. Reported subframes can be 1066 * either regular MSDU or singly A-MSDUs. Subframes must not be 1067 * interleaved with other frames. 1068 * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific 1069 * radiotap data in the skb->data (before the frame) as described by 1070 * the &struct ieee80211_vendor_radiotap. 1071 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. 1072 * This is used for AMSDU subframes which can have the same PN as 1073 * the first subframe. 1074 */ 1075 enum mac80211_rx_flags { 1076 RX_FLAG_MMIC_ERROR = BIT(0), 1077 RX_FLAG_DECRYPTED = BIT(1), 1078 RX_FLAG_MACTIME_PLCP_START = BIT(2), 1079 RX_FLAG_MMIC_STRIPPED = BIT(3), 1080 RX_FLAG_IV_STRIPPED = BIT(4), 1081 RX_FLAG_FAILED_FCS_CRC = BIT(5), 1082 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 1083 RX_FLAG_MACTIME_START = BIT(7), 1084 RX_FLAG_SHORTPRE = BIT(8), 1085 RX_FLAG_HT = BIT(9), 1086 RX_FLAG_40MHZ = BIT(10), 1087 RX_FLAG_SHORT_GI = BIT(11), 1088 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 1089 RX_FLAG_HT_GF = BIT(13), 1090 RX_FLAG_AMPDU_DETAILS = BIT(14), 1091 RX_FLAG_PN_VALIDATED = BIT(15), 1092 RX_FLAG_DUP_VALIDATED = BIT(16), 1093 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 1094 RX_FLAG_AMPDU_IS_LAST = BIT(18), 1095 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 1096 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 1097 RX_FLAG_MACTIME_END = BIT(21), 1098 RX_FLAG_VHT = BIT(22), 1099 RX_FLAG_LDPC = BIT(23), 1100 RX_FLAG_ONLY_MONITOR = BIT(24), 1101 RX_FLAG_SKIP_MONITOR = BIT(25), 1102 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 1103 RX_FLAG_10MHZ = BIT(28), 1104 RX_FLAG_5MHZ = BIT(29), 1105 RX_FLAG_AMSDU_MORE = BIT(30), 1106 RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), 1107 RX_FLAG_MIC_STRIPPED = BIT_ULL(32), 1108 RX_FLAG_ALLOW_SAME_PN = BIT_ULL(33), 1109 }; 1110 1111 #define RX_FLAG_STBC_SHIFT 26 1112 1113 /** 1114 * enum mac80211_rx_vht_flags - receive VHT flags 1115 * 1116 * These flags are used with the @vht_flag member of 1117 * &struct ieee80211_rx_status. 1118 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 1119 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 1120 * @RX_VHT_FLAG_BF: packet was beamformed 1121 */ 1122 1123 enum mac80211_rx_vht_flags { 1124 RX_VHT_FLAG_80MHZ = BIT(0), 1125 RX_VHT_FLAG_160MHZ = BIT(1), 1126 RX_VHT_FLAG_BF = BIT(2), 1127 }; 1128 1129 /** 1130 * struct ieee80211_rx_status - receive status 1131 * 1132 * The low-level driver should provide this information (the subset 1133 * supported by hardware) to the 802.11 code with each received 1134 * frame, in the skb's control buffer (cb). 1135 * 1136 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 1137 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 1138 * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is 1139 * needed only for beacons and probe responses that update the scan cache. 1140 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 1141 * it but can store it and pass it back to the driver for synchronisation 1142 * @band: the active band when this frame was received 1143 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 1144 * This field must be set for management frames, but isn't strictly needed 1145 * for data (other) frames - for those it only affects radiotap reporting. 1146 * @signal: signal strength when receiving this frame, either in dBm, in dB or 1147 * unspecified depending on the hardware capabilities flags 1148 * @IEEE80211_HW_SIGNAL_* 1149 * @chains: bitmask of receive chains for which separate signal strength 1150 * values were filled. 1151 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 1152 * support dB or unspecified units) 1153 * @antenna: antenna used 1154 * @rate_idx: index of data rate into band's supported rates or MCS index if 1155 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 1156 * @vht_nss: number of streams (VHT only) 1157 * @flag: %RX_FLAG_* 1158 * @vht_flag: %RX_VHT_FLAG_* 1159 * @rx_flags: internal RX flags for mac80211 1160 * @ampdu_reference: A-MPDU reference number, must be a different value for 1161 * each A-MPDU but the same for each subframe within one A-MPDU 1162 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 1163 */ 1164 struct ieee80211_rx_status { 1165 u64 mactime; 1166 u64 boottime_ns; 1167 u32 device_timestamp; 1168 u32 ampdu_reference; 1169 u64 flag; 1170 u16 freq; 1171 u8 vht_flag; 1172 u8 rate_idx; 1173 u8 vht_nss; 1174 u8 rx_flags; 1175 u8 band; 1176 u8 antenna; 1177 s8 signal; 1178 u8 chains; 1179 s8 chain_signal[IEEE80211_MAX_CHAINS]; 1180 u8 ampdu_delimiter_crc; 1181 }; 1182 1183 /** 1184 * struct ieee80211_vendor_radiotap - vendor radiotap data information 1185 * @present: presence bitmap for this vendor namespace 1186 * (this could be extended in the future if any vendor needs more 1187 * bits, the radiotap spec does allow for that) 1188 * @align: radiotap vendor namespace alignment. This defines the needed 1189 * alignment for the @data field below, not for the vendor namespace 1190 * description itself (which has a fixed 2-byte alignment) 1191 * Must be a power of two, and be set to at least 1! 1192 * @oui: radiotap vendor namespace OUI 1193 * @subns: radiotap vendor sub namespace 1194 * @len: radiotap vendor sub namespace skip length, if alignment is done 1195 * then that's added to this, i.e. this is only the length of the 1196 * @data field. 1197 * @pad: number of bytes of padding after the @data, this exists so that 1198 * the skb data alignment can be preserved even if the data has odd 1199 * length 1200 * @data: the actual vendor namespace data 1201 * 1202 * This struct, including the vendor data, goes into the skb->data before 1203 * the 802.11 header. It's split up in mac80211 using the align/oui/subns 1204 * data. 1205 */ 1206 struct ieee80211_vendor_radiotap { 1207 u32 present; 1208 u8 align; 1209 u8 oui[3]; 1210 u8 subns; 1211 u8 pad; 1212 u16 len; 1213 u8 data[]; 1214 } __packed; 1215 1216 /** 1217 * enum ieee80211_conf_flags - configuration flags 1218 * 1219 * Flags to define PHY configuration options 1220 * 1221 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 1222 * to determine for example whether to calculate timestamps for packets 1223 * or not, do not use instead of filter flags! 1224 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 1225 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 1226 * meaning that the hardware still wakes up for beacons, is able to 1227 * transmit frames and receive the possible acknowledgment frames. 1228 * Not to be confused with hardware specific wakeup/sleep states, 1229 * driver is responsible for that. See the section "Powersave support" 1230 * for more. 1231 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 1232 * the driver should be prepared to handle configuration requests but 1233 * may turn the device off as much as possible. Typically, this flag will 1234 * be set when an interface is set UP but not associated or scanning, but 1235 * it can also be unset in that case when monitor interfaces are active. 1236 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 1237 * operating channel. 1238 */ 1239 enum ieee80211_conf_flags { 1240 IEEE80211_CONF_MONITOR = (1<<0), 1241 IEEE80211_CONF_PS = (1<<1), 1242 IEEE80211_CONF_IDLE = (1<<2), 1243 IEEE80211_CONF_OFFCHANNEL = (1<<3), 1244 }; 1245 1246 1247 /** 1248 * enum ieee80211_conf_changed - denotes which configuration changed 1249 * 1250 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 1251 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 1252 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 1253 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 1254 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 1255 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 1256 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 1257 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 1258 * Note that this is only valid if channel contexts are not used, 1259 * otherwise each channel context has the number of chains listed. 1260 */ 1261 enum ieee80211_conf_changed { 1262 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 1263 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 1264 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 1265 IEEE80211_CONF_CHANGE_PS = BIT(4), 1266 IEEE80211_CONF_CHANGE_POWER = BIT(5), 1267 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 1268 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 1269 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 1270 }; 1271 1272 /** 1273 * enum ieee80211_smps_mode - spatial multiplexing power save mode 1274 * 1275 * @IEEE80211_SMPS_AUTOMATIC: automatic 1276 * @IEEE80211_SMPS_OFF: off 1277 * @IEEE80211_SMPS_STATIC: static 1278 * @IEEE80211_SMPS_DYNAMIC: dynamic 1279 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1280 */ 1281 enum ieee80211_smps_mode { 1282 IEEE80211_SMPS_AUTOMATIC, 1283 IEEE80211_SMPS_OFF, 1284 IEEE80211_SMPS_STATIC, 1285 IEEE80211_SMPS_DYNAMIC, 1286 1287 /* keep last */ 1288 IEEE80211_SMPS_NUM_MODES, 1289 }; 1290 1291 /** 1292 * struct ieee80211_conf - configuration of the device 1293 * 1294 * This struct indicates how the driver shall configure the hardware. 1295 * 1296 * @flags: configuration flags defined above 1297 * 1298 * @listen_interval: listen interval in units of beacon interval 1299 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1300 * in power saving. Power saving will not be enabled until a beacon 1301 * has been received and the DTIM period is known. 1302 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1303 * powersave documentation below. This variable is valid only when 1304 * the CONF_PS flag is set. 1305 * 1306 * @power_level: requested transmit power (in dBm), backward compatibility 1307 * value only that is set to the minimum of all interfaces 1308 * 1309 * @chandef: the channel definition to tune to 1310 * @radar_enabled: whether radar detection is enabled 1311 * 1312 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1313 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1314 * but actually means the number of transmissions not the number of retries 1315 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1316 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1317 * number of transmissions not the number of retries 1318 * 1319 * @smps_mode: spatial multiplexing powersave mode; note that 1320 * %IEEE80211_SMPS_STATIC is used when the device is not 1321 * configured for an HT channel. 1322 * Note that this is only valid if channel contexts are not used, 1323 * otherwise each channel context has the number of chains listed. 1324 */ 1325 struct ieee80211_conf { 1326 u32 flags; 1327 int power_level, dynamic_ps_timeout; 1328 1329 u16 listen_interval; 1330 u8 ps_dtim_period; 1331 1332 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1333 1334 struct cfg80211_chan_def chandef; 1335 bool radar_enabled; 1336 enum ieee80211_smps_mode smps_mode; 1337 }; 1338 1339 /** 1340 * struct ieee80211_channel_switch - holds the channel switch data 1341 * 1342 * The information provided in this structure is required for channel switch 1343 * operation. 1344 * 1345 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1346 * Function (TSF) timer when the frame containing the channel switch 1347 * announcement was received. This is simply the rx.mactime parameter 1348 * the driver passed into mac80211. 1349 * @device_timestamp: arbitrary timestamp for the device, this is the 1350 * rx.device_timestamp parameter the driver passed to mac80211. 1351 * @block_tx: Indicates whether transmission must be blocked before the 1352 * scheduled channel switch, as indicated by the AP. 1353 * @chandef: the new channel to switch to 1354 * @count: the number of TBTT's until the channel switch event 1355 */ 1356 struct ieee80211_channel_switch { 1357 u64 timestamp; 1358 u32 device_timestamp; 1359 bool block_tx; 1360 struct cfg80211_chan_def chandef; 1361 u8 count; 1362 }; 1363 1364 /** 1365 * enum ieee80211_vif_flags - virtual interface flags 1366 * 1367 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1368 * on this virtual interface to avoid unnecessary CPU wakeups 1369 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1370 * monitoring on this virtual interface -- i.e. it can monitor 1371 * connection quality related parameters, such as the RSSI level and 1372 * provide notifications if configured trigger levels are reached. 1373 * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this 1374 * interface. This flag should be set during interface addition, 1375 * but may be set/cleared as late as authentication to an AP. It is 1376 * only valid for managed/station mode interfaces. 1377 * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes 1378 * and send P2P_PS notification to the driver if NOA changed, even 1379 * this is not pure P2P vif. 1380 */ 1381 enum ieee80211_vif_flags { 1382 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1383 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1384 IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2), 1385 IEEE80211_VIF_GET_NOA_UPDATE = BIT(3), 1386 }; 1387 1388 /** 1389 * struct ieee80211_vif - per-interface data 1390 * 1391 * Data in this structure is continually present for driver 1392 * use during the life of a virtual interface. 1393 * 1394 * @type: type of this virtual interface 1395 * @bss_conf: BSS configuration for this interface, either our own 1396 * or the BSS we're associated to 1397 * @addr: address of this interface 1398 * @p2p: indicates whether this AP or STA interface is a p2p 1399 * interface, i.e. a GO or p2p-sta respectively 1400 * @csa_active: marks whether a channel switch is going on. Internally it is 1401 * write-protected by sdata_lock and local->mtx so holding either is fine 1402 * for read access. 1403 * @mu_mimo_owner: indicates interface owns MU-MIMO capability 1404 * @driver_flags: flags/capabilities the driver has for this interface, 1405 * these need to be set (or cleared) when the interface is added 1406 * or, if supported by the driver, the interface type is changed 1407 * at runtime, mac80211 will never touch this field 1408 * @hw_queue: hardware queue for each AC 1409 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1410 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1411 * when it is not assigned. This pointer is RCU-protected due to the TX 1412 * path needing to access it; even though the netdev carrier will always 1413 * be off when it is %NULL there can still be races and packets could be 1414 * processed after it switches back to %NULL. 1415 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1416 * interface debug files. Note that it will be NULL for the virtual 1417 * monitor interface (if that is requested.) 1418 * @probe_req_reg: probe requests should be reported to mac80211 for this 1419 * interface. 1420 * @drv_priv: data area for driver use, will always be aligned to 1421 * sizeof(void *). 1422 * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) 1423 */ 1424 struct ieee80211_vif { 1425 enum nl80211_iftype type; 1426 struct ieee80211_bss_conf bss_conf; 1427 u8 addr[ETH_ALEN]; 1428 bool p2p; 1429 bool csa_active; 1430 bool mu_mimo_owner; 1431 1432 u8 cab_queue; 1433 u8 hw_queue[IEEE80211_NUM_ACS]; 1434 1435 struct ieee80211_txq *txq; 1436 1437 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1438 1439 u32 driver_flags; 1440 1441 #ifdef CONFIG_MAC80211_DEBUGFS 1442 struct dentry *debugfs_dir; 1443 #endif 1444 1445 unsigned int probe_req_reg; 1446 1447 /* must be last */ 1448 u8 drv_priv[0] __aligned(sizeof(void *)); 1449 }; 1450 1451 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1452 { 1453 #ifdef CONFIG_MAC80211_MESH 1454 return vif->type == NL80211_IFTYPE_MESH_POINT; 1455 #endif 1456 return false; 1457 } 1458 1459 /** 1460 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1461 * @wdev: the wdev to get the vif for 1462 * 1463 * This can be used by mac80211 drivers with direct cfg80211 APIs 1464 * (like the vendor commands) that get a wdev. 1465 * 1466 * Note that this function may return %NULL if the given wdev isn't 1467 * associated with a vif that the driver knows about (e.g. monitor 1468 * or AP_VLAN interfaces.) 1469 */ 1470 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1471 1472 /** 1473 * ieee80211_vif_to_wdev - return a wdev struct from a vif 1474 * @vif: the vif to get the wdev for 1475 * 1476 * This can be used by mac80211 drivers with direct cfg80211 APIs 1477 * (like the vendor commands) that needs to get the wdev for a vif. 1478 * 1479 * Note that this function may return %NULL if the given wdev isn't 1480 * associated with a vif that the driver knows about (e.g. monitor 1481 * or AP_VLAN interfaces.) 1482 */ 1483 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); 1484 1485 /** 1486 * enum ieee80211_key_flags - key flags 1487 * 1488 * These flags are used for communication about keys between the driver 1489 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1490 * 1491 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1492 * driver to indicate that it requires IV generation for this 1493 * particular key. Setting this flag does not necessarily mean that SKBs 1494 * will have sufficient tailroom for ICV or MIC. 1495 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1496 * the driver for a TKIP key if it requires Michael MIC 1497 * generation in software. 1498 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1499 * that the key is pairwise rather then a shared key. 1500 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1501 * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames 1502 * (MFP) to be done in software. 1503 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1504 * if space should be prepared for the IV, but the IV 1505 * itself should not be generated. Do not set together with 1506 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does 1507 * not necessarily mean that SKBs will have sufficient tailroom for ICV or 1508 * MIC. 1509 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1510 * management frames. The flag can help drivers that have a hardware 1511 * crypto implementation that doesn't deal with management frames 1512 * properly by allowing them to not upload the keys to hardware and 1513 * fall back to software crypto. Note that this flag deals only with 1514 * RX, if your crypto engine can't deal with TX you can also set the 1515 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1516 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the 1517 * driver for a CCMP/GCMP key to indicate that is requires IV generation 1518 * only for managment frames (MFP). 1519 * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the 1520 * driver for a key to indicate that sufficient tailroom must always 1521 * be reserved for ICV or MIC, even when HW encryption is enabled. 1522 */ 1523 enum ieee80211_key_flags { 1524 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), 1525 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), 1526 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), 1527 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), 1528 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), 1529 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), 1530 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), 1531 IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7), 1532 }; 1533 1534 /** 1535 * struct ieee80211_key_conf - key information 1536 * 1537 * This key information is given by mac80211 to the driver by 1538 * the set_key() callback in &struct ieee80211_ops. 1539 * 1540 * @hw_key_idx: To be set by the driver, this is the key index the driver 1541 * wants to be given when a frame is transmitted and needs to be 1542 * encrypted in hardware. 1543 * @cipher: The key's cipher suite selector. 1544 * @tx_pn: PN used for TX keys, may be used by the driver as well if it 1545 * needs to do software PN assignment by itself (e.g. due to TSO) 1546 * @flags: key flags, see &enum ieee80211_key_flags. 1547 * @keyidx: the key index (0-3) 1548 * @keylen: key material length 1549 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1550 * data block: 1551 * - Temporal Encryption Key (128 bits) 1552 * - Temporal Authenticator Tx MIC Key (64 bits) 1553 * - Temporal Authenticator Rx MIC Key (64 bits) 1554 * @icv_len: The ICV length for this key type 1555 * @iv_len: The IV length for this key type 1556 */ 1557 struct ieee80211_key_conf { 1558 atomic64_t tx_pn; 1559 u32 cipher; 1560 u8 icv_len; 1561 u8 iv_len; 1562 u8 hw_key_idx; 1563 u8 flags; 1564 s8 keyidx; 1565 u8 keylen; 1566 u8 key[0]; 1567 }; 1568 1569 #define IEEE80211_MAX_PN_LEN 16 1570 1571 #define TKIP_PN_TO_IV16(pn) ((u16)(pn & 0xffff)) 1572 #define TKIP_PN_TO_IV32(pn) ((u32)((pn >> 16) & 0xffffffff)) 1573 1574 /** 1575 * struct ieee80211_key_seq - key sequence counter 1576 * 1577 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 1578 * @ccmp: PN data, most significant byte first (big endian, 1579 * reverse order than in packet) 1580 * @aes_cmac: PN data, most significant byte first (big endian, 1581 * reverse order than in packet) 1582 * @aes_gmac: PN data, most significant byte first (big endian, 1583 * reverse order than in packet) 1584 * @gcmp: PN data, most significant byte first (big endian, 1585 * reverse order than in packet) 1586 * @hw: data for HW-only (e.g. cipher scheme) keys 1587 */ 1588 struct ieee80211_key_seq { 1589 union { 1590 struct { 1591 u32 iv32; 1592 u16 iv16; 1593 } tkip; 1594 struct { 1595 u8 pn[6]; 1596 } ccmp; 1597 struct { 1598 u8 pn[6]; 1599 } aes_cmac; 1600 struct { 1601 u8 pn[6]; 1602 } aes_gmac; 1603 struct { 1604 u8 pn[6]; 1605 } gcmp; 1606 struct { 1607 u8 seq[IEEE80211_MAX_PN_LEN]; 1608 u8 seq_len; 1609 } hw; 1610 }; 1611 }; 1612 1613 /** 1614 * struct ieee80211_cipher_scheme - cipher scheme 1615 * 1616 * This structure contains a cipher scheme information defining 1617 * the secure packet crypto handling. 1618 * 1619 * @cipher: a cipher suite selector 1620 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1621 * @hdr_len: a length of a security header used the cipher 1622 * @pn_len: a length of a packet number in the security header 1623 * @pn_off: an offset of pn from the beginning of the security header 1624 * @key_idx_off: an offset of key index byte in the security header 1625 * @key_idx_mask: a bit mask of key_idx bits 1626 * @key_idx_shift: a bit shift needed to get key_idx 1627 * key_idx value calculation: 1628 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1629 * @mic_len: a mic length in bytes 1630 */ 1631 struct ieee80211_cipher_scheme { 1632 u32 cipher; 1633 u16 iftype; 1634 u8 hdr_len; 1635 u8 pn_len; 1636 u8 pn_off; 1637 u8 key_idx_off; 1638 u8 key_idx_mask; 1639 u8 key_idx_shift; 1640 u8 mic_len; 1641 }; 1642 1643 /** 1644 * enum set_key_cmd - key command 1645 * 1646 * Used with the set_key() callback in &struct ieee80211_ops, this 1647 * indicates whether a key is being removed or added. 1648 * 1649 * @SET_KEY: a key is set 1650 * @DISABLE_KEY: a key must be disabled 1651 */ 1652 enum set_key_cmd { 1653 SET_KEY, DISABLE_KEY, 1654 }; 1655 1656 /** 1657 * enum ieee80211_sta_state - station state 1658 * 1659 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1660 * this is a special state for add/remove transitions 1661 * @IEEE80211_STA_NONE: station exists without special state 1662 * @IEEE80211_STA_AUTH: station is authenticated 1663 * @IEEE80211_STA_ASSOC: station is associated 1664 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1665 */ 1666 enum ieee80211_sta_state { 1667 /* NOTE: These need to be ordered correctly! */ 1668 IEEE80211_STA_NOTEXIST, 1669 IEEE80211_STA_NONE, 1670 IEEE80211_STA_AUTH, 1671 IEEE80211_STA_ASSOC, 1672 IEEE80211_STA_AUTHORIZED, 1673 }; 1674 1675 /** 1676 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1677 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1678 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1679 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1680 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1681 * (including 80+80 MHz) 1682 * 1683 * Implementation note: 20 must be zero to be initialized 1684 * correctly, the values must be sorted. 1685 */ 1686 enum ieee80211_sta_rx_bandwidth { 1687 IEEE80211_STA_RX_BW_20 = 0, 1688 IEEE80211_STA_RX_BW_40, 1689 IEEE80211_STA_RX_BW_80, 1690 IEEE80211_STA_RX_BW_160, 1691 }; 1692 1693 /** 1694 * struct ieee80211_sta_rates - station rate selection table 1695 * 1696 * @rcu_head: RCU head used for freeing the table on update 1697 * @rate: transmit rates/flags to be used by default. 1698 * Overriding entries per-packet is possible by using cb tx control. 1699 */ 1700 struct ieee80211_sta_rates { 1701 struct rcu_head rcu_head; 1702 struct { 1703 s8 idx; 1704 u8 count; 1705 u8 count_cts; 1706 u8 count_rts; 1707 u16 flags; 1708 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1709 }; 1710 1711 /** 1712 * struct ieee80211_sta - station table entry 1713 * 1714 * A station table entry represents a station we are possibly 1715 * communicating with. Since stations are RCU-managed in 1716 * mac80211, any ieee80211_sta pointer you get access to must 1717 * either be protected by rcu_read_lock() explicitly or implicitly, 1718 * or you must take good care to not use such a pointer after a 1719 * call to your sta_remove callback that removed it. 1720 * 1721 * @addr: MAC address 1722 * @aid: AID we assigned to the station if we're an AP 1723 * @supp_rates: Bitmap of supported rates (per band) 1724 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1725 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1726 * @wme: indicates whether the STA supports QoS/WME (if local devices does, 1727 * otherwise always false) 1728 * @drv_priv: data area for driver use, will always be aligned to 1729 * sizeof(void *), size is determined in hw information. 1730 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1731 * if wme is supported. 1732 * @max_sp: max Service Period. Only valid if wme is supported. 1733 * @bandwidth: current bandwidth the station can receive with 1734 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1735 * station can receive at the moment, changed by operating mode 1736 * notifications and capabilities. The value is only valid after 1737 * the station moves to associated state. 1738 * @smps_mode: current SMPS mode (off, static or dynamic) 1739 * @rates: rate control selection table 1740 * @tdls: indicates whether the STA is a TDLS peer 1741 * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only 1742 * valid if the STA is a TDLS peer in the first place. 1743 * @mfp: indicates whether the STA uses management frame protection or not. 1744 * @max_amsdu_subframes: indicates the maximal number of MSDUs in a single 1745 * A-MSDU. Taken from the Extended Capabilities element. 0 means 1746 * unlimited. 1747 * @max_amsdu_len: indicates the maximal length of an A-MSDU in bytes. This 1748 * field is always valid for packets with a VHT preamble. For packets 1749 * with a HT preamble, additional limits apply: 1750 * + If the skb is transmitted as part of a BA agreement, the 1751 * A-MSDU maximal size is min(max_amsdu_len, 4065) bytes. 1752 * + If the skb is not part of a BA aggreement, the A-MSDU maximal 1753 * size is min(max_amsdu_len, 7935) bytes. 1754 * Both additional HT limits must be enforced by the low level driver. 1755 * This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2). 1756 * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not. 1757 * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control. 1758 * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) 1759 */ 1760 struct ieee80211_sta { 1761 u32 supp_rates[NUM_NL80211_BANDS]; 1762 u8 addr[ETH_ALEN]; 1763 u16 aid; 1764 struct ieee80211_sta_ht_cap ht_cap; 1765 struct ieee80211_sta_vht_cap vht_cap; 1766 bool wme; 1767 u8 uapsd_queues; 1768 u8 max_sp; 1769 u8 rx_nss; 1770 enum ieee80211_sta_rx_bandwidth bandwidth; 1771 enum ieee80211_smps_mode smps_mode; 1772 struct ieee80211_sta_rates __rcu *rates; 1773 bool tdls; 1774 bool tdls_initiator; 1775 bool mfp; 1776 u8 max_amsdu_subframes; 1777 u16 max_amsdu_len; 1778 bool support_p2p_ps; 1779 u16 max_rc_amsdu_len; 1780 1781 struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; 1782 1783 /* must be last */ 1784 u8 drv_priv[0] __aligned(sizeof(void *)); 1785 }; 1786 1787 /** 1788 * enum sta_notify_cmd - sta notify command 1789 * 1790 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1791 * indicates if an associated station made a power state transition. 1792 * 1793 * @STA_NOTIFY_SLEEP: a station is now sleeping 1794 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1795 */ 1796 enum sta_notify_cmd { 1797 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1798 }; 1799 1800 /** 1801 * struct ieee80211_tx_control - TX control data 1802 * 1803 * @sta: station table entry, this sta pointer may be NULL and 1804 * it is not allowed to copy the pointer, due to RCU. 1805 */ 1806 struct ieee80211_tx_control { 1807 struct ieee80211_sta *sta; 1808 }; 1809 1810 /** 1811 * struct ieee80211_txq - Software intermediate tx queue 1812 * 1813 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 1814 * @sta: station table entry, %NULL for per-vif queue 1815 * @tid: the TID for this queue (unused for per-vif queue) 1816 * @ac: the AC for this queue 1817 * @drv_priv: driver private area, sized by hw->txq_data_size 1818 * 1819 * The driver can obtain packets from this queue by calling 1820 * ieee80211_tx_dequeue(). 1821 */ 1822 struct ieee80211_txq { 1823 struct ieee80211_vif *vif; 1824 struct ieee80211_sta *sta; 1825 u8 tid; 1826 u8 ac; 1827 1828 /* must be last */ 1829 u8 drv_priv[0] __aligned(sizeof(void *)); 1830 }; 1831 1832 /** 1833 * enum ieee80211_hw_flags - hardware flags 1834 * 1835 * These flags are used to indicate hardware capabilities to 1836 * the stack. Generally, flags here should have their meaning 1837 * done in a way that the simplest hardware doesn't need setting 1838 * any particular flags. There are some exceptions to this rule, 1839 * however, so you are advised to review these flags carefully. 1840 * 1841 * @IEEE80211_HW_HAS_RATE_CONTROL: 1842 * The hardware or firmware includes rate control, and cannot be 1843 * controlled by the stack. As such, no rate control algorithm 1844 * should be instantiated, and the TX rate reported to userspace 1845 * will be taken from the TX status instead of the rate control 1846 * algorithm. 1847 * Note that this requires that the driver implement a number of 1848 * callbacks so it has the correct information, it needs to have 1849 * the @set_rts_threshold callback and must look at the BSS config 1850 * @use_cts_prot for G/N protection, @use_short_slot for slot 1851 * timing in 2.4 GHz and @use_short_preamble for preambles for 1852 * CCK frames. 1853 * 1854 * @IEEE80211_HW_RX_INCLUDES_FCS: 1855 * Indicates that received frames passed to the stack include 1856 * the FCS at the end. 1857 * 1858 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1859 * Some wireless LAN chipsets buffer broadcast/multicast frames 1860 * for power saving stations in the hardware/firmware and others 1861 * rely on the host system for such buffering. This option is used 1862 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1863 * multicast frames when there are power saving stations so that 1864 * the driver can fetch them with ieee80211_get_buffered_bc(). 1865 * 1866 * @IEEE80211_HW_SIGNAL_UNSPEC: 1867 * Hardware can provide signal values but we don't know its units. We 1868 * expect values between 0 and @max_signal. 1869 * If possible please provide dB or dBm instead. 1870 * 1871 * @IEEE80211_HW_SIGNAL_DBM: 1872 * Hardware gives signal values in dBm, decibel difference from 1873 * one milliwatt. This is the preferred method since it is standardized 1874 * between different devices. @max_signal does not need to be set. 1875 * 1876 * @IEEE80211_HW_SPECTRUM_MGMT: 1877 * Hardware supports spectrum management defined in 802.11h 1878 * Measurement, Channel Switch, Quieting, TPC 1879 * 1880 * @IEEE80211_HW_AMPDU_AGGREGATION: 1881 * Hardware supports 11n A-MPDU aggregation. 1882 * 1883 * @IEEE80211_HW_SUPPORTS_PS: 1884 * Hardware has power save support (i.e. can go to sleep). 1885 * 1886 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1887 * Hardware requires nullfunc frame handling in stack, implies 1888 * stack support for dynamic PS. 1889 * 1890 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1891 * Hardware has support for dynamic PS. 1892 * 1893 * @IEEE80211_HW_MFP_CAPABLE: 1894 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1895 * 1896 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1897 * Hardware can provide ack status reports of Tx frames to 1898 * the stack. 1899 * 1900 * @IEEE80211_HW_CONNECTION_MONITOR: 1901 * The hardware performs its own connection monitoring, including 1902 * periodic keep-alives to the AP and probing the AP on beacon loss. 1903 * 1904 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1905 * This device needs to get data from beacon before association (i.e. 1906 * dtim_period). 1907 * 1908 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1909 * per-station GTKs as used by IBSS RSN or during fast transition. If 1910 * the device doesn't support per-station GTKs, but can be asked not 1911 * to decrypt group addressed frames, then IBSS RSN support is still 1912 * possible but software crypto will be used. Advertise the wiphy flag 1913 * only in that case. 1914 * 1915 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1916 * autonomously manages the PS status of connected stations. When 1917 * this flag is set mac80211 will not trigger PS mode for connected 1918 * stations based on the PM bit of incoming frames. 1919 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1920 * the PS mode of connected stations. 1921 * 1922 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1923 * setup strictly in HW. mac80211 should not attempt to do this in 1924 * software. 1925 * 1926 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1927 * a virtual monitor interface when monitor interfaces are the only 1928 * active interfaces. 1929 * 1930 * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to 1931 * be created. It is expected user-space will create vifs as 1932 * desired (and thus have them named as desired). 1933 * 1934 * @IEEE80211_HW_SW_CRYPTO_CONTROL: The driver wants to control which of the 1935 * crypto algorithms can be done in software - so don't automatically 1936 * try to fall back to it if hardware crypto fails, but do so only if 1937 * the driver returns 1. This also forces the driver to advertise its 1938 * supported cipher suites. 1939 * 1940 * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit, 1941 * this currently requires only the ability to calculate the duration 1942 * for frames. 1943 * 1944 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1945 * queue mapping in order to use different queues (not just one per AC) 1946 * for different virtual interfaces. See the doc section on HW queue 1947 * control for more details. 1948 * 1949 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1950 * selection table provided by the rate control algorithm. 1951 * 1952 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1953 * P2P Interface. This will be honoured even if more than one interface 1954 * is supported. 1955 * 1956 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1957 * only, to allow getting TBTT of a DTIM beacon. 1958 * 1959 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1960 * and can cope with CCK rates in an aggregation session (e.g. by not 1961 * using aggregation for such frames.) 1962 * 1963 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1964 * for a single active channel while using channel contexts. When support 1965 * is not enabled the default action is to disconnect when getting the 1966 * CSA frame. 1967 * 1968 * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload 1969 * or tailroom of TX skbs without copying them first. 1970 * 1971 * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands 1972 * in one command, mac80211 doesn't have to run separate scans per band. 1973 * 1974 * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth 1975 * than then BSS bandwidth for a TDLS link on the base channel. 1976 * 1977 * @IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU: The driver supports receiving A-MSDUs 1978 * within A-MPDU. 1979 * 1980 * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status 1981 * for sent beacons. 1982 * 1983 * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each 1984 * station has a unique address, i.e. each station entry can be identified 1985 * by just its MAC address; this prevents, for example, the same station 1986 * from connecting to two virtual AP interfaces at the same time. 1987 * 1988 * @IEEE80211_HW_SUPPORTS_REORDERING_BUFFER: Hardware (or driver) manages the 1989 * reordering buffer internally, guaranteeing mac80211 receives frames in 1990 * order and does not need to manage its own reorder buffer or BA session 1991 * timeout. 1992 * 1993 * @IEEE80211_HW_USES_RSS: The device uses RSS and thus requires parallel RX, 1994 * which implies using per-CPU station statistics. 1995 * 1996 * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated 1997 * A-MSDU frames. Requires software tx queueing and fast-xmit support. 1998 * When not using minstrel/minstrel_ht rate control, the driver must 1999 * limit the maximum A-MSDU size based on the current tx rate by setting 2000 * max_rc_amsdu_len in struct ieee80211_sta. 2001 * 2002 * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list 2003 * skbs, needed for zero-copy software A-MSDU. 2004 * 2005 * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays 2006 */ 2007 enum ieee80211_hw_flags { 2008 IEEE80211_HW_HAS_RATE_CONTROL, 2009 IEEE80211_HW_RX_INCLUDES_FCS, 2010 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING, 2011 IEEE80211_HW_SIGNAL_UNSPEC, 2012 IEEE80211_HW_SIGNAL_DBM, 2013 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC, 2014 IEEE80211_HW_SPECTRUM_MGMT, 2015 IEEE80211_HW_AMPDU_AGGREGATION, 2016 IEEE80211_HW_SUPPORTS_PS, 2017 IEEE80211_HW_PS_NULLFUNC_STACK, 2018 IEEE80211_HW_SUPPORTS_DYNAMIC_PS, 2019 IEEE80211_HW_MFP_CAPABLE, 2020 IEEE80211_HW_WANT_MONITOR_VIF, 2021 IEEE80211_HW_NO_AUTO_VIF, 2022 IEEE80211_HW_SW_CRYPTO_CONTROL, 2023 IEEE80211_HW_SUPPORT_FAST_XMIT, 2024 IEEE80211_HW_REPORTS_TX_ACK_STATUS, 2025 IEEE80211_HW_CONNECTION_MONITOR, 2026 IEEE80211_HW_QUEUE_CONTROL, 2027 IEEE80211_HW_SUPPORTS_PER_STA_GTK, 2028 IEEE80211_HW_AP_LINK_PS, 2029 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW, 2030 IEEE80211_HW_SUPPORTS_RC_TABLE, 2031 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF, 2032 IEEE80211_HW_TIMING_BEACON_ONLY, 2033 IEEE80211_HW_SUPPORTS_HT_CCK_RATES, 2034 IEEE80211_HW_CHANCTX_STA_CSA, 2035 IEEE80211_HW_SUPPORTS_CLONED_SKBS, 2036 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS, 2037 IEEE80211_HW_TDLS_WIDER_BW, 2038 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU, 2039 IEEE80211_HW_BEACON_TX_STATUS, 2040 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR, 2041 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER, 2042 IEEE80211_HW_USES_RSS, 2043 IEEE80211_HW_TX_AMSDU, 2044 IEEE80211_HW_TX_FRAG_LIST, 2045 2046 /* keep last, obviously */ 2047 NUM_IEEE80211_HW_FLAGS 2048 }; 2049 2050 /** 2051 * struct ieee80211_hw - hardware information and state 2052 * 2053 * This structure contains the configuration and hardware 2054 * information for an 802.11 PHY. 2055 * 2056 * @wiphy: This points to the &struct wiphy allocated for this 2057 * 802.11 PHY. You must fill in the @perm_addr and @dev 2058 * members of this structure using SET_IEEE80211_DEV() 2059 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 2060 * bands (with channels, bitrates) are registered here. 2061 * 2062 * @conf: &struct ieee80211_conf, device configuration, don't use. 2063 * 2064 * @priv: pointer to private area that was allocated for driver use 2065 * along with this structure. 2066 * 2067 * @flags: hardware flags, see &enum ieee80211_hw_flags. 2068 * 2069 * @extra_tx_headroom: headroom to reserve in each transmit skb 2070 * for use by the driver (e.g. for transmit headers.) 2071 * 2072 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 2073 * Can be used by drivers to add extra IEs. 2074 * 2075 * @max_signal: Maximum value for signal (rssi) in RX information, used 2076 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 2077 * 2078 * @max_listen_interval: max listen interval in units of beacon interval 2079 * that HW supports 2080 * 2081 * @queues: number of available hardware transmit queues for 2082 * data packets. WMM/QoS requires at least four, these 2083 * queues need to have configurable access parameters. 2084 * 2085 * @rate_control_algorithm: rate control algorithm for this hardware. 2086 * If unset (NULL), the default algorithm will be used. Must be 2087 * set before calling ieee80211_register_hw(). 2088 * 2089 * @vif_data_size: size (in bytes) of the drv_priv data area 2090 * within &struct ieee80211_vif. 2091 * @sta_data_size: size (in bytes) of the drv_priv data area 2092 * within &struct ieee80211_sta. 2093 * @chanctx_data_size: size (in bytes) of the drv_priv data area 2094 * within &struct ieee80211_chanctx_conf. 2095 * @txq_data_size: size (in bytes) of the drv_priv data area 2096 * within @struct ieee80211_txq. 2097 * 2098 * @max_rates: maximum number of alternate rate retry stages the hw 2099 * can handle. 2100 * @max_report_rates: maximum number of alternate rate retry stages 2101 * the hw can report back. 2102 * @max_rate_tries: maximum number of tries for each stage 2103 * 2104 * @max_rx_aggregation_subframes: maximum buffer size (number of 2105 * sub-frames) to be used for A-MPDU block ack receiver 2106 * aggregation. 2107 * This is only relevant if the device has restrictions on the 2108 * number of subframes, if it relies on mac80211 to do reordering 2109 * it shouldn't be set. 2110 * 2111 * @max_tx_aggregation_subframes: maximum number of subframes in an 2112 * aggregate an HT driver will transmit. Though ADDBA will advertise 2113 * a constant value of 64 as some older APs can crash if the window 2114 * size is smaller (an example is LinkSys WRT120N with FW v1.0.07 2115 * build 002 Jun 18 2012). 2116 * 2117 * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum 2118 * of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list. 2119 * 2120 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 2121 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 2122 * 2123 * @radiotap_mcs_details: lists which MCS information can the HW 2124 * reports, by default it is set to _MCS, _GI and _BW but doesn't 2125 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 2126 * adding _BW is supported today. 2127 * 2128 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 2129 * the default is _GI | _BANDWIDTH. 2130 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 2131 * 2132 * @netdev_features: netdev features to be set in each netdev created 2133 * from this HW. Note that not all features are usable with mac80211, 2134 * other features will be rejected during HW registration. 2135 * 2136 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 2137 * for each access category if it is uAPSD trigger-enabled and delivery- 2138 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 2139 * Each bit corresponds to different AC. Value '1' in specific bit means 2140 * that corresponding AC is both trigger- and delivery-enabled. '0' means 2141 * neither enabled. 2142 * 2143 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 2144 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 2145 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 2146 * 2147 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 2148 * @cipher_schemes: a pointer to an array of cipher scheme definitions 2149 * supported by HW. 2150 * 2151 * @txq_ac_max_pending: maximum number of frames per AC pending in all txq 2152 * entries for a vif. 2153 */ 2154 struct ieee80211_hw { 2155 struct ieee80211_conf conf; 2156 struct wiphy *wiphy; 2157 const char *rate_control_algorithm; 2158 void *priv; 2159 unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)]; 2160 unsigned int extra_tx_headroom; 2161 unsigned int extra_beacon_tailroom; 2162 int vif_data_size; 2163 int sta_data_size; 2164 int chanctx_data_size; 2165 int txq_data_size; 2166 u16 queues; 2167 u16 max_listen_interval; 2168 s8 max_signal; 2169 u8 max_rates; 2170 u8 max_report_rates; 2171 u8 max_rate_tries; 2172 u8 max_rx_aggregation_subframes; 2173 u8 max_tx_aggregation_subframes; 2174 u8 max_tx_fragments; 2175 u8 offchannel_tx_hw_queue; 2176 u8 radiotap_mcs_details; 2177 u16 radiotap_vht_details; 2178 netdev_features_t netdev_features; 2179 u8 uapsd_queues; 2180 u8 uapsd_max_sp_len; 2181 u8 n_cipher_schemes; 2182 const struct ieee80211_cipher_scheme *cipher_schemes; 2183 int txq_ac_max_pending; 2184 }; 2185 2186 static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw, 2187 enum ieee80211_hw_flags flg) 2188 { 2189 return test_bit(flg, hw->flags); 2190 } 2191 #define ieee80211_hw_check(hw, flg) _ieee80211_hw_check(hw, IEEE80211_HW_##flg) 2192 2193 static inline void _ieee80211_hw_set(struct ieee80211_hw *hw, 2194 enum ieee80211_hw_flags flg) 2195 { 2196 return __set_bit(flg, hw->flags); 2197 } 2198 #define ieee80211_hw_set(hw, flg) _ieee80211_hw_set(hw, IEEE80211_HW_##flg) 2199 2200 /** 2201 * struct ieee80211_scan_request - hw scan request 2202 * 2203 * @ies: pointers different parts of IEs (in req.ie) 2204 * @req: cfg80211 request. 2205 */ 2206 struct ieee80211_scan_request { 2207 struct ieee80211_scan_ies ies; 2208 2209 /* Keep last */ 2210 struct cfg80211_scan_request req; 2211 }; 2212 2213 /** 2214 * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters 2215 * 2216 * @sta: peer this TDLS channel-switch request/response came from 2217 * @chandef: channel referenced in a TDLS channel-switch request 2218 * @action_code: see &enum ieee80211_tdls_actioncode 2219 * @status: channel-switch response status 2220 * @timestamp: time at which the frame was received 2221 * @switch_time: switch-timing parameter received in the frame 2222 * @switch_timeout: switch-timing parameter received in the frame 2223 * @tmpl_skb: TDLS switch-channel response template 2224 * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb 2225 */ 2226 struct ieee80211_tdls_ch_sw_params { 2227 struct ieee80211_sta *sta; 2228 struct cfg80211_chan_def *chandef; 2229 u8 action_code; 2230 u32 status; 2231 u32 timestamp; 2232 u16 switch_time; 2233 u16 switch_timeout; 2234 struct sk_buff *tmpl_skb; 2235 u32 ch_sw_tm_ie; 2236 }; 2237 2238 /** 2239 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 2240 * 2241 * @wiphy: the &struct wiphy which we want to query 2242 * 2243 * mac80211 drivers can use this to get to their respective 2244 * &struct ieee80211_hw. Drivers wishing to get to their own private 2245 * structure can then access it via hw->priv. Note that mac802111 drivers should 2246 * not use wiphy_priv() to try to get their private driver structure as this 2247 * is already used internally by mac80211. 2248 * 2249 * Return: The mac80211 driver hw struct of @wiphy. 2250 */ 2251 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 2252 2253 /** 2254 * SET_IEEE80211_DEV - set device for 802.11 hardware 2255 * 2256 * @hw: the &struct ieee80211_hw to set the device for 2257 * @dev: the &struct device of this 802.11 device 2258 */ 2259 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 2260 { 2261 set_wiphy_dev(hw->wiphy, dev); 2262 } 2263 2264 /** 2265 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 2266 * 2267 * @hw: the &struct ieee80211_hw to set the MAC address for 2268 * @addr: the address to set 2269 */ 2270 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, const u8 *addr) 2271 { 2272 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 2273 } 2274 2275 static inline struct ieee80211_rate * 2276 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 2277 const struct ieee80211_tx_info *c) 2278 { 2279 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 2280 return NULL; 2281 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 2282 } 2283 2284 static inline struct ieee80211_rate * 2285 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 2286 const struct ieee80211_tx_info *c) 2287 { 2288 if (c->control.rts_cts_rate_idx < 0) 2289 return NULL; 2290 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 2291 } 2292 2293 static inline struct ieee80211_rate * 2294 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 2295 const struct ieee80211_tx_info *c, int idx) 2296 { 2297 if (c->control.rates[idx + 1].idx < 0) 2298 return NULL; 2299 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 2300 } 2301 2302 /** 2303 * ieee80211_free_txskb - free TX skb 2304 * @hw: the hardware 2305 * @skb: the skb 2306 * 2307 * Free a transmit skb. Use this funtion when some failure 2308 * to transmit happened and thus status cannot be reported. 2309 */ 2310 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 2311 2312 /** 2313 * DOC: Hardware crypto acceleration 2314 * 2315 * mac80211 is capable of taking advantage of many hardware 2316 * acceleration designs for encryption and decryption operations. 2317 * 2318 * The set_key() callback in the &struct ieee80211_ops for a given 2319 * device is called to enable hardware acceleration of encryption and 2320 * decryption. The callback takes a @sta parameter that will be NULL 2321 * for default keys or keys used for transmission only, or point to 2322 * the station information for the peer for individual keys. 2323 * Multiple transmission keys with the same key index may be used when 2324 * VLANs are configured for an access point. 2325 * 2326 * When transmitting, the TX control data will use the @hw_key_idx 2327 * selected by the driver by modifying the &struct ieee80211_key_conf 2328 * pointed to by the @key parameter to the set_key() function. 2329 * 2330 * The set_key() call for the %SET_KEY command should return 0 if 2331 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 2332 * added; if you return 0 then hw_key_idx must be assigned to the 2333 * hardware key index, you are free to use the full u8 range. 2334 * 2335 * Note that in the case that the @IEEE80211_HW_SW_CRYPTO_CONTROL flag is 2336 * set, mac80211 will not automatically fall back to software crypto if 2337 * enabling hardware crypto failed. The set_key() call may also return the 2338 * value 1 to permit this specific key/algorithm to be done in software. 2339 * 2340 * When the cmd is %DISABLE_KEY then it must succeed. 2341 * 2342 * Note that it is permissible to not decrypt a frame even if a key 2343 * for it has been uploaded to hardware, the stack will not make any 2344 * decision based on whether a key has been uploaded or not but rather 2345 * based on the receive flags. 2346 * 2347 * The &struct ieee80211_key_conf structure pointed to by the @key 2348 * parameter is guaranteed to be valid until another call to set_key() 2349 * removes it, but it can only be used as a cookie to differentiate 2350 * keys. 2351 * 2352 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 2353 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 2354 * handler. 2355 * The update_tkip_key() call updates the driver with the new phase 1 key. 2356 * This happens every time the iv16 wraps around (every 65536 packets). The 2357 * set_key() call will happen only once for each key (unless the AP did 2358 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 2359 * provided by update_tkip_key only. The trigger that makes mac80211 call this 2360 * handler is software decryption with wrap around of iv16. 2361 * 2362 * The set_default_unicast_key() call updates the default WEP key index 2363 * configured to the hardware for WEP encryption type. This is required 2364 * for devices that support offload of data packets (e.g. ARP responses). 2365 */ 2366 2367 /** 2368 * DOC: Powersave support 2369 * 2370 * mac80211 has support for various powersave implementations. 2371 * 2372 * First, it can support hardware that handles all powersaving by itself, 2373 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 2374 * flag. In that case, it will be told about the desired powersave mode 2375 * with the %IEEE80211_CONF_PS flag depending on the association status. 2376 * The hardware must take care of sending nullfunc frames when necessary, 2377 * i.e. when entering and leaving powersave mode. The hardware is required 2378 * to look at the AID in beacons and signal to the AP that it woke up when 2379 * it finds traffic directed to it. 2380 * 2381 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 2382 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 2383 * with hardware wakeup and sleep states. Driver is responsible for waking 2384 * up the hardware before issuing commands to the hardware and putting it 2385 * back to sleep at appropriate times. 2386 * 2387 * When PS is enabled, hardware needs to wakeup for beacons and receive the 2388 * buffered multicast/broadcast frames after the beacon. Also it must be 2389 * possible to send frames and receive the acknowledment frame. 2390 * 2391 * Other hardware designs cannot send nullfunc frames by themselves and also 2392 * need software support for parsing the TIM bitmap. This is also supported 2393 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 2394 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 2395 * required to pass up beacons. The hardware is still required to handle 2396 * waking up for multicast traffic; if it cannot the driver must handle that 2397 * as best as it can, mac80211 is too slow to do that. 2398 * 2399 * Dynamic powersave is an extension to normal powersave in which the 2400 * hardware stays awake for a user-specified period of time after sending a 2401 * frame so that reply frames need not be buffered and therefore delayed to 2402 * the next wakeup. It's compromise of getting good enough latency when 2403 * there's data traffic and still saving significantly power in idle 2404 * periods. 2405 * 2406 * Dynamic powersave is simply supported by mac80211 enabling and disabling 2407 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 2408 * flag and mac80211 will handle everything automatically. Additionally, 2409 * hardware having support for the dynamic PS feature may set the 2410 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 2411 * dynamic PS mode itself. The driver needs to look at the 2412 * @dynamic_ps_timeout hardware configuration value and use it that value 2413 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 2414 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 2415 * enabled whenever user has enabled powersave. 2416 * 2417 * Driver informs U-APSD client support by enabling 2418 * %IEEE80211_VIF_SUPPORTS_UAPSD flag. The mode is configured through the 2419 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS 2420 * Nullfunc frames and stay awake until the service period has ended. To 2421 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 2422 * from that AC are transmitted with powersave enabled. 2423 * 2424 * Note: U-APSD client mode is not yet supported with 2425 * %IEEE80211_HW_PS_NULLFUNC_STACK. 2426 */ 2427 2428 /** 2429 * DOC: Beacon filter support 2430 * 2431 * Some hardware have beacon filter support to reduce host cpu wakeups 2432 * which will reduce system power consumption. It usually works so that 2433 * the firmware creates a checksum of the beacon but omits all constantly 2434 * changing elements (TSF, TIM etc). Whenever the checksum changes the 2435 * beacon is forwarded to the host, otherwise it will be just dropped. That 2436 * way the host will only receive beacons where some relevant information 2437 * (for example ERP protection or WMM settings) have changed. 2438 * 2439 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 2440 * interface capability. The driver needs to enable beacon filter support 2441 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 2442 * power save is enabled, the stack will not check for beacon loss and the 2443 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 2444 * 2445 * The time (or number of beacons missed) until the firmware notifies the 2446 * driver of a beacon loss event (which in turn causes the driver to call 2447 * ieee80211_beacon_loss()) should be configurable and will be controlled 2448 * by mac80211 and the roaming algorithm in the future. 2449 * 2450 * Since there may be constantly changing information elements that nothing 2451 * in the software stack cares about, we will, in the future, have mac80211 2452 * tell the driver which information elements are interesting in the sense 2453 * that we want to see changes in them. This will include 2454 * - a list of information element IDs 2455 * - a list of OUIs for the vendor information element 2456 * 2457 * Ideally, the hardware would filter out any beacons without changes in the 2458 * requested elements, but if it cannot support that it may, at the expense 2459 * of some efficiency, filter out only a subset. For example, if the device 2460 * doesn't support checking for OUIs it should pass up all changes in all 2461 * vendor information elements. 2462 * 2463 * Note that change, for the sake of simplification, also includes information 2464 * elements appearing or disappearing from the beacon. 2465 * 2466 * Some hardware supports an "ignore list" instead, just make sure nothing 2467 * that was requested is on the ignore list, and include commonly changing 2468 * information element IDs in the ignore list, for example 11 (BSS load) and 2469 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 2470 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 2471 * it could also include some currently unused IDs. 2472 * 2473 * 2474 * In addition to these capabilities, hardware should support notifying the 2475 * host of changes in the beacon RSSI. This is relevant to implement roaming 2476 * when no traffic is flowing (when traffic is flowing we see the RSSI of 2477 * the received data packets). This can consist in notifying the host when 2478 * the RSSI changes significantly or when it drops below or rises above 2479 * configurable thresholds. In the future these thresholds will also be 2480 * configured by mac80211 (which gets them from userspace) to implement 2481 * them as the roaming algorithm requires. 2482 * 2483 * If the hardware cannot implement this, the driver should ask it to 2484 * periodically pass beacon frames to the host so that software can do the 2485 * signal strength threshold checking. 2486 */ 2487 2488 /** 2489 * DOC: Spatial multiplexing power save 2490 * 2491 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 2492 * power in an 802.11n implementation. For details on the mechanism 2493 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 2494 * "11.2.3 SM power save". 2495 * 2496 * The mac80211 implementation is capable of sending action frames 2497 * to update the AP about the station's SMPS mode, and will instruct 2498 * the driver to enter the specific mode. It will also announce the 2499 * requested SMPS mode during the association handshake. Hardware 2500 * support for this feature is required, and can be indicated by 2501 * hardware flags. 2502 * 2503 * The default mode will be "automatic", which nl80211/cfg80211 2504 * defines to be dynamic SMPS in (regular) powersave, and SMPS 2505 * turned off otherwise. 2506 * 2507 * To support this feature, the driver must set the appropriate 2508 * hardware support flags, and handle the SMPS flag to the config() 2509 * operation. It will then with this mechanism be instructed to 2510 * enter the requested SMPS mode while associated to an HT AP. 2511 */ 2512 2513 /** 2514 * DOC: Frame filtering 2515 * 2516 * mac80211 requires to see many management frames for proper 2517 * operation, and users may want to see many more frames when 2518 * in monitor mode. However, for best CPU usage and power consumption, 2519 * having as few frames as possible percolate through the stack is 2520 * desirable. Hence, the hardware should filter as much as possible. 2521 * 2522 * To achieve this, mac80211 uses filter flags (see below) to tell 2523 * the driver's configure_filter() function which frames should be 2524 * passed to mac80211 and which should be filtered out. 2525 * 2526 * Before configure_filter() is invoked, the prepare_multicast() 2527 * callback is invoked with the parameters @mc_count and @mc_list 2528 * for the combined multicast address list of all virtual interfaces. 2529 * It's use is optional, and it returns a u64 that is passed to 2530 * configure_filter(). Additionally, configure_filter() has the 2531 * arguments @changed_flags telling which flags were changed and 2532 * @total_flags with the new flag states. 2533 * 2534 * If your device has no multicast address filters your driver will 2535 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2536 * parameter to see whether multicast frames should be accepted 2537 * or dropped. 2538 * 2539 * All unsupported flags in @total_flags must be cleared. 2540 * Hardware does not support a flag if it is incapable of _passing_ 2541 * the frame to the stack. Otherwise the driver must ignore 2542 * the flag, but not clear it. 2543 * You must _only_ clear the flag (announce no support for the 2544 * flag to mac80211) if you are not able to pass the packet type 2545 * to the stack (so the hardware always filters it). 2546 * So for example, you should clear @FIF_CONTROL, if your hardware 2547 * always filters control frames. If your hardware always passes 2548 * control frames to the kernel and is incapable of filtering them, 2549 * you do _not_ clear the @FIF_CONTROL flag. 2550 * This rule applies to all other FIF flags as well. 2551 */ 2552 2553 /** 2554 * DOC: AP support for powersaving clients 2555 * 2556 * In order to implement AP and P2P GO modes, mac80211 has support for 2557 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2558 * There currently is no support for sAPSD. 2559 * 2560 * There is one assumption that mac80211 makes, namely that a client 2561 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2562 * Both are supported, and both can be used by the same client, but 2563 * they can't be used concurrently by the same client. This simplifies 2564 * the driver code. 2565 * 2566 * The first thing to keep in mind is that there is a flag for complete 2567 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2568 * mac80211 expects the driver to handle most of the state machine for 2569 * powersaving clients and will ignore the PM bit in incoming frames. 2570 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2571 * stations' powersave transitions. In this mode, mac80211 also doesn't 2572 * handle PS-Poll/uAPSD. 2573 * 2574 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2575 * PM bit in incoming frames for client powersave transitions. When a 2576 * station goes to sleep, we will stop transmitting to it. There is, 2577 * however, a race condition: a station might go to sleep while there is 2578 * data buffered on hardware queues. If the device has support for this 2579 * it will reject frames, and the driver should give the frames back to 2580 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2581 * cause mac80211 to retry the frame when the station wakes up. The 2582 * driver is also notified of powersave transitions by calling its 2583 * @sta_notify callback. 2584 * 2585 * When the station is asleep, it has three choices: it can wake up, 2586 * it can PS-Poll, or it can possibly start a uAPSD service period. 2587 * Waking up is implemented by simply transmitting all buffered (and 2588 * filtered) frames to the station. This is the easiest case. When 2589 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2590 * will inform the driver of this with the @allow_buffered_frames 2591 * callback; this callback is optional. mac80211 will then transmit 2592 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2593 * on each frame. The last frame in the service period (or the only 2594 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2595 * indicate that it ends the service period; as this frame must have 2596 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2597 * When TX status is reported for this frame, the service period is 2598 * marked has having ended and a new one can be started by the peer. 2599 * 2600 * Additionally, non-bufferable MMPDUs can also be transmitted by 2601 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2602 * 2603 * Another race condition can happen on some devices like iwlwifi 2604 * when there are frames queued for the station and it wakes up 2605 * or polls; the frames that are already queued could end up being 2606 * transmitted first instead, causing reordering and/or wrong 2607 * processing of the EOSP. The cause is that allowing frames to be 2608 * transmitted to a certain station is out-of-band communication to 2609 * the device. To allow this problem to be solved, the driver can 2610 * call ieee80211_sta_block_awake() if frames are buffered when it 2611 * is notified that the station went to sleep. When all these frames 2612 * have been filtered (see above), it must call the function again 2613 * to indicate that the station is no longer blocked. 2614 * 2615 * If the driver buffers frames in the driver for aggregation in any 2616 * way, it must use the ieee80211_sta_set_buffered() call when it is 2617 * notified of the station going to sleep to inform mac80211 of any 2618 * TIDs that have frames buffered. Note that when a station wakes up 2619 * this information is reset (hence the requirement to call it when 2620 * informed of the station going to sleep). Then, when a service 2621 * period starts for any reason, @release_buffered_frames is called 2622 * with the number of frames to be released and which TIDs they are 2623 * to come from. In this case, the driver is responsible for setting 2624 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2625 * to help the @more_data parameter is passed to tell the driver if 2626 * there is more data on other TIDs -- the TIDs to release frames 2627 * from are ignored since mac80211 doesn't know how many frames the 2628 * buffers for those TIDs contain. 2629 * 2630 * If the driver also implement GO mode, where absence periods may 2631 * shorten service periods (or abort PS-Poll responses), it must 2632 * filter those response frames except in the case of frames that 2633 * are buffered in the driver -- those must remain buffered to avoid 2634 * reordering. Because it is possible that no frames are released 2635 * in this case, the driver must call ieee80211_sta_eosp() 2636 * to indicate to mac80211 that the service period ended anyway. 2637 * 2638 * Finally, if frames from multiple TIDs are released from mac80211 2639 * but the driver might reorder them, it must clear & set the flags 2640 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2641 * and also take care of the EOSP and MORE_DATA bits in the frame. 2642 * The driver may also use ieee80211_sta_eosp() in this case. 2643 * 2644 * Note that if the driver ever buffers frames other than QoS-data 2645 * frames, it must take care to never send a non-QoS-data frame as 2646 * the last frame in a service period, adding a QoS-nulldata frame 2647 * after a non-QoS-data frame if needed. 2648 */ 2649 2650 /** 2651 * DOC: HW queue control 2652 * 2653 * Before HW queue control was introduced, mac80211 only had a single static 2654 * assignment of per-interface AC software queues to hardware queues. This 2655 * was problematic for a few reasons: 2656 * 1) off-channel transmissions might get stuck behind other frames 2657 * 2) multiple virtual interfaces couldn't be handled correctly 2658 * 3) after-DTIM frames could get stuck behind other frames 2659 * 2660 * To solve this, hardware typically uses multiple different queues for all 2661 * the different usages, and this needs to be propagated into mac80211 so it 2662 * won't have the same problem with the software queues. 2663 * 2664 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2665 * flag that tells it that the driver implements its own queue control. To do 2666 * so, the driver will set up the various queues in each &struct ieee80211_vif 2667 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2668 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2669 * if necessary will queue the frame on the right software queue that mirrors 2670 * the hardware queue. 2671 * Additionally, the driver has to then use these HW queue IDs for the queue 2672 * management functions (ieee80211_stop_queue() et al.) 2673 * 2674 * The driver is free to set up the queue mappings as needed, multiple virtual 2675 * interfaces may map to the same hardware queues if needed. The setup has to 2676 * happen during add_interface or change_interface callbacks. For example, a 2677 * driver supporting station+station and station+AP modes might decide to have 2678 * 10 hardware queues to handle different scenarios: 2679 * 2680 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2681 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2682 * after-DTIM queue for AP: 8 2683 * off-channel queue: 9 2684 * 2685 * It would then set up the hardware like this: 2686 * hw.offchannel_tx_hw_queue = 9 2687 * 2688 * and the first virtual interface that is added as follows: 2689 * vif.hw_queue[IEEE80211_AC_VO] = 0 2690 * vif.hw_queue[IEEE80211_AC_VI] = 1 2691 * vif.hw_queue[IEEE80211_AC_BE] = 2 2692 * vif.hw_queue[IEEE80211_AC_BK] = 3 2693 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2694 * and the second virtual interface with 4-7. 2695 * 2696 * If queue 6 gets full, for example, mac80211 would only stop the second 2697 * virtual interface's BE queue since virtual interface queues are per AC. 2698 * 2699 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2700 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2701 * queue could potentially be shared since mac80211 will look at cab_queue when 2702 * a queue is stopped/woken even if the interface is not in AP mode. 2703 */ 2704 2705 /** 2706 * enum ieee80211_filter_flags - hardware filter flags 2707 * 2708 * These flags determine what the filter in hardware should be 2709 * programmed to let through and what should not be passed to the 2710 * stack. It is always safe to pass more frames than requested, 2711 * but this has negative impact on power consumption. 2712 * 2713 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2714 * by the user or if the hardware is not capable of filtering by 2715 * multicast address. 2716 * 2717 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2718 * %RX_FLAG_FAILED_FCS_CRC for them) 2719 * 2720 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2721 * the %RX_FLAG_FAILED_PLCP_CRC for them 2722 * 2723 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2724 * to the hardware that it should not filter beacons or probe responses 2725 * by BSSID. Filtering them can greatly reduce the amount of processing 2726 * mac80211 needs to do and the amount of CPU wakeups, so you should 2727 * honour this flag if possible. 2728 * 2729 * @FIF_CONTROL: pass control frames (except for PS Poll) addressed to this 2730 * station 2731 * 2732 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2733 * 2734 * @FIF_PSPOLL: pass PS Poll frames 2735 * 2736 * @FIF_PROBE_REQ: pass probe request frames 2737 */ 2738 enum ieee80211_filter_flags { 2739 FIF_ALLMULTI = 1<<1, 2740 FIF_FCSFAIL = 1<<2, 2741 FIF_PLCPFAIL = 1<<3, 2742 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2743 FIF_CONTROL = 1<<5, 2744 FIF_OTHER_BSS = 1<<6, 2745 FIF_PSPOLL = 1<<7, 2746 FIF_PROBE_REQ = 1<<8, 2747 }; 2748 2749 /** 2750 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2751 * 2752 * These flags are used with the ampdu_action() callback in 2753 * &struct ieee80211_ops to indicate which action is needed. 2754 * 2755 * Note that drivers MUST be able to deal with a TX aggregation 2756 * session being stopped even before they OK'ed starting it by 2757 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2758 * might receive the addBA frame and send a delBA right away! 2759 * 2760 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2761 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2762 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2763 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2764 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2765 * queued packets, now unaggregated. After all packets are transmitted the 2766 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2767 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2768 * called when the station is removed. There's no need or reason to call 2769 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2770 * session is gone and removes the station. 2771 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2772 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2773 * now the connection is dropped and the station will be removed. Drivers 2774 * should clean up and drop remaining packets when this is called. 2775 */ 2776 enum ieee80211_ampdu_mlme_action { 2777 IEEE80211_AMPDU_RX_START, 2778 IEEE80211_AMPDU_RX_STOP, 2779 IEEE80211_AMPDU_TX_START, 2780 IEEE80211_AMPDU_TX_STOP_CONT, 2781 IEEE80211_AMPDU_TX_STOP_FLUSH, 2782 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2783 IEEE80211_AMPDU_TX_OPERATIONAL, 2784 }; 2785 2786 /** 2787 * struct ieee80211_ampdu_params - AMPDU action parameters 2788 * 2789 * @action: the ampdu action, value from %ieee80211_ampdu_mlme_action. 2790 * @sta: peer of this AMPDU session 2791 * @tid: tid of the BA session 2792 * @ssn: start sequence number of the session. TX/RX_STOP can pass 0. When 2793 * action is set to %IEEE80211_AMPDU_RX_START the driver passes back the 2794 * actual ssn value used to start the session and writes the value here. 2795 * @buf_size: reorder buffer size (number of subframes). Valid only when the 2796 * action is set to %IEEE80211_AMPDU_RX_START or 2797 * %IEEE80211_AMPDU_TX_OPERATIONAL 2798 * @amsdu: indicates the peer's ability to receive A-MSDU within A-MPDU. 2799 * valid when the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL 2800 * @timeout: BA session timeout. Valid only when the action is set to 2801 * %IEEE80211_AMPDU_RX_START 2802 */ 2803 struct ieee80211_ampdu_params { 2804 enum ieee80211_ampdu_mlme_action action; 2805 struct ieee80211_sta *sta; 2806 u16 tid; 2807 u16 ssn; 2808 u8 buf_size; 2809 bool amsdu; 2810 u16 timeout; 2811 }; 2812 2813 /** 2814 * enum ieee80211_frame_release_type - frame release reason 2815 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2816 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2817 * frame received on trigger-enabled AC 2818 */ 2819 enum ieee80211_frame_release_type { 2820 IEEE80211_FRAME_RELEASE_PSPOLL, 2821 IEEE80211_FRAME_RELEASE_UAPSD, 2822 }; 2823 2824 /** 2825 * enum ieee80211_rate_control_changed - flags to indicate what changed 2826 * 2827 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2828 * to this station changed. The actual bandwidth is in the station 2829 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2830 * flag changes, for HT and VHT the bandwidth field changes. 2831 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2832 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2833 * changed (in IBSS mode) due to discovering more information about 2834 * the peer. 2835 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2836 * by the peer 2837 */ 2838 enum ieee80211_rate_control_changed { 2839 IEEE80211_RC_BW_CHANGED = BIT(0), 2840 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2841 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2842 IEEE80211_RC_NSS_CHANGED = BIT(3), 2843 }; 2844 2845 /** 2846 * enum ieee80211_roc_type - remain on channel type 2847 * 2848 * With the support for multi channel contexts and multi channel operations, 2849 * remain on channel operations might be limited/deferred/aborted by other 2850 * flows/operations which have higher priority (and vise versa). 2851 * Specifying the ROC type can be used by devices to prioritize the ROC 2852 * operations compared to other operations/flows. 2853 * 2854 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2855 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2856 * for sending managment frames offchannel. 2857 */ 2858 enum ieee80211_roc_type { 2859 IEEE80211_ROC_TYPE_NORMAL = 0, 2860 IEEE80211_ROC_TYPE_MGMT_TX, 2861 }; 2862 2863 /** 2864 * enum ieee80211_reconfig_complete_type - reconfig type 2865 * 2866 * This enum is used by the reconfig_complete() callback to indicate what 2867 * reconfiguration type was completed. 2868 * 2869 * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type 2870 * (also due to resume() callback returning 1) 2871 * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless 2872 * of wowlan configuration) 2873 */ 2874 enum ieee80211_reconfig_type { 2875 IEEE80211_RECONFIG_TYPE_RESTART, 2876 IEEE80211_RECONFIG_TYPE_SUSPEND, 2877 }; 2878 2879 /** 2880 * struct ieee80211_ops - callbacks from mac80211 to the driver 2881 * 2882 * This structure contains various callbacks that the driver may 2883 * handle or, in some cases, must handle, for example to configure 2884 * the hardware to a new channel or to transmit a frame. 2885 * 2886 * @tx: Handler that 802.11 module calls for each transmitted frame. 2887 * skb contains the buffer starting from the IEEE 802.11 header. 2888 * The low-level driver should send the frame out based on 2889 * configuration in the TX control data. This handler should, 2890 * preferably, never fail and stop queues appropriately. 2891 * Must be atomic. 2892 * 2893 * @start: Called before the first netdevice attached to the hardware 2894 * is enabled. This should turn on the hardware and must turn on 2895 * frame reception (for possibly enabled monitor interfaces.) 2896 * Returns negative error codes, these may be seen in userspace, 2897 * or zero. 2898 * When the device is started it should not have a MAC address 2899 * to avoid acknowledging frames before a non-monitor device 2900 * is added. 2901 * Must be implemented and can sleep. 2902 * 2903 * @stop: Called after last netdevice attached to the hardware 2904 * is disabled. This should turn off the hardware (at least 2905 * it must turn off frame reception.) 2906 * May be called right after add_interface if that rejects 2907 * an interface. If you added any work onto the mac80211 workqueue 2908 * you should ensure to cancel it on this callback. 2909 * Must be implemented and can sleep. 2910 * 2911 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2912 * stop transmitting and doing any other configuration, and then 2913 * ask the device to suspend. This is only invoked when WoWLAN is 2914 * configured, otherwise the device is deconfigured completely and 2915 * reconfigured at resume time. 2916 * The driver may also impose special conditions under which it 2917 * wants to use the "normal" suspend (deconfigure), say if it only 2918 * supports WoWLAN when the device is associated. In this case, it 2919 * must return 1 from this function. 2920 * 2921 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2922 * now resuming its operation, after this the device must be fully 2923 * functional again. If this returns an error, the only way out is 2924 * to also unregister the device. If it returns 1, then mac80211 2925 * will also go through the regular complete restart on resume. 2926 * 2927 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2928 * modified. The reason is that device_set_wakeup_enable() is 2929 * supposed to be called when the configuration changes, not only 2930 * in suspend(). 2931 * 2932 * @add_interface: Called when a netdevice attached to the hardware is 2933 * enabled. Because it is not called for monitor mode devices, @start 2934 * and @stop must be implemented. 2935 * The driver should perform any initialization it needs before 2936 * the device can be enabled. The initial configuration for the 2937 * interface is given in the conf parameter. 2938 * The callback may refuse to add an interface by returning a 2939 * negative error code (which will be seen in userspace.) 2940 * Must be implemented and can sleep. 2941 * 2942 * @change_interface: Called when a netdevice changes type. This callback 2943 * is optional, but only if it is supported can interface types be 2944 * switched while the interface is UP. The callback may sleep. 2945 * Note that while an interface is being switched, it will not be 2946 * found by the interface iteration callbacks. 2947 * 2948 * @remove_interface: Notifies a driver that an interface is going down. 2949 * The @stop callback is called after this if it is the last interface 2950 * and no monitor interfaces are present. 2951 * When all interfaces are removed, the MAC address in the hardware 2952 * must be cleared so the device no longer acknowledges packets, 2953 * the mac_addr member of the conf structure is, however, set to the 2954 * MAC address of the device going away. 2955 * Hence, this callback must be implemented. It can sleep. 2956 * 2957 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2958 * function to change hardware configuration, e.g., channel. 2959 * This function should never fail but returns a negative error code 2960 * if it does. The callback can sleep. 2961 * 2962 * @bss_info_changed: Handler for configuration requests related to BSS 2963 * parameters that may vary during BSS's lifespan, and may affect low 2964 * level driver (e.g. assoc/disassoc status, erp parameters). 2965 * This function should not be used if no BSS has been set, unless 2966 * for association indication. The @changed parameter indicates which 2967 * of the bss parameters has changed when a call is made. The callback 2968 * can sleep. 2969 * 2970 * @prepare_multicast: Prepare for multicast filter configuration. 2971 * This callback is optional, and its return value is passed 2972 * to configure_filter(). This callback must be atomic. 2973 * 2974 * @configure_filter: Configure the device's RX filter. 2975 * See the section "Frame filtering" for more information. 2976 * This callback must be implemented and can sleep. 2977 * 2978 * @config_iface_filter: Configure the interface's RX filter. 2979 * This callback is optional and is used to configure which frames 2980 * should be passed to mac80211. The filter_flags is the combination 2981 * of FIF_* flags. The changed_flags is a bit mask that indicates 2982 * which flags are changed. 2983 * This callback can sleep. 2984 * 2985 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2986 * must be set or cleared for a given STA. Must be atomic. 2987 * 2988 * @set_key: See the section "Hardware crypto acceleration" 2989 * This callback is only called between add_interface and 2990 * remove_interface calls, i.e. while the given virtual interface 2991 * is enabled. 2992 * Returns a negative error code if the key can't be added. 2993 * The callback can sleep. 2994 * 2995 * @update_tkip_key: See the section "Hardware crypto acceleration" 2996 * This callback will be called in the context of Rx. Called for drivers 2997 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2998 * The callback must be atomic. 2999 * 3000 * @set_rekey_data: If the device supports GTK rekeying, for example while the 3001 * host is suspended, it can assign this callback to retrieve the data 3002 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 3003 * After rekeying was done it should (for example during resume) notify 3004 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 3005 * 3006 * @set_default_unicast_key: Set the default (unicast) key index, useful for 3007 * WEP when the device sends data packets autonomously, e.g. for ARP 3008 * offloading. The index can be 0-3, or -1 for unsetting it. 3009 * 3010 * @hw_scan: Ask the hardware to service the scan request, no need to start 3011 * the scan state machine in stack. The scan must honour the channel 3012 * configuration done by the regulatory agent in the wiphy's 3013 * registered bands. The hardware (or the driver) needs to make sure 3014 * that power save is disabled. 3015 * The @req ie/ie_len members are rewritten by mac80211 to contain the 3016 * entire IEs after the SSID, so that drivers need not look at these 3017 * at all but just send them after the SSID -- mac80211 includes the 3018 * (extended) supported rates and HT information (where applicable). 3019 * When the scan finishes, ieee80211_scan_completed() must be called; 3020 * note that it also must be called when the scan cannot finish due to 3021 * any error unless this callback returned a negative error code. 3022 * The callback can sleep. 3023 * 3024 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 3025 * The driver should ask the hardware to cancel the scan (if possible), 3026 * but the scan will be completed only after the driver will call 3027 * ieee80211_scan_completed(). 3028 * This callback is needed for wowlan, to prevent enqueueing a new 3029 * scan_work after the low-level driver was already suspended. 3030 * The callback can sleep. 3031 * 3032 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 3033 * specific intervals. The driver must call the 3034 * ieee80211_sched_scan_results() function whenever it finds results. 3035 * This process will continue until sched_scan_stop is called. 3036 * 3037 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 3038 * In this case, ieee80211_sched_scan_stopped() must not be called. 3039 * 3040 * @sw_scan_start: Notifier function that is called just before a software scan 3041 * is started. Can be NULL, if the driver doesn't need this notification. 3042 * The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR, 3043 * the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it 3044 * can use this parameter. The callback can sleep. 3045 * 3046 * @sw_scan_complete: Notifier function that is called just after a 3047 * software scan finished. Can be NULL, if the driver doesn't need 3048 * this notification. 3049 * The callback can sleep. 3050 * 3051 * @get_stats: Return low-level statistics. 3052 * Returns zero if statistics are available. 3053 * The callback can sleep. 3054 * 3055 * @get_key_seq: If your device implements encryption in hardware and does 3056 * IV/PN assignment then this callback should be provided to read the 3057 * IV/PN for the given key from hardware. 3058 * The callback must be atomic. 3059 * 3060 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 3061 * if the device does fragmentation by itself; if this callback is 3062 * implemented then the stack will not do fragmentation. 3063 * The callback can sleep. 3064 * 3065 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 3066 * The callback can sleep. 3067 * 3068 * @sta_add: Notifies low level driver about addition of an associated station, 3069 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 3070 * 3071 * @sta_remove: Notifies low level driver about removal of an associated 3072 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 3073 * returns it isn't safe to use the pointer, not even RCU protected; 3074 * no RCU grace period is guaranteed between returning here and freeing 3075 * the station. See @sta_pre_rcu_remove if needed. 3076 * This callback can sleep. 3077 * 3078 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 3079 * when a station is added to mac80211's station list. This callback 3080 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 3081 * conditional. This callback can sleep. 3082 * 3083 * @sta_remove_debugfs: Remove the debugfs files which were added using 3084 * @sta_add_debugfs. This callback can sleep. 3085 * 3086 * @sta_notify: Notifies low level driver about power state transition of an 3087 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 3088 * in AP mode, this callback will not be called when the flag 3089 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 3090 * 3091 * @sta_state: Notifies low level driver about state transition of a 3092 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 3093 * This callback is mutually exclusive with @sta_add/@sta_remove. 3094 * It must not fail for down transitions but may fail for transitions 3095 * up the list of states. Also note that after the callback returns it 3096 * isn't safe to use the pointer, not even RCU protected - no RCU grace 3097 * period is guaranteed between returning here and freeing the station. 3098 * See @sta_pre_rcu_remove if needed. 3099 * The callback can sleep. 3100 * 3101 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 3102 * synchronisation. This is useful if a driver needs to have station 3103 * pointers protected using RCU, it can then use this call to clear 3104 * the pointers instead of waiting for an RCU grace period to elapse 3105 * in @sta_state. 3106 * The callback can sleep. 3107 * 3108 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 3109 * used to transmit to the station. The changes are advertised with bits 3110 * from &enum ieee80211_rate_control_changed and the values are reflected 3111 * in the station data. This callback should only be used when the driver 3112 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 3113 * otherwise the rate control algorithm is notified directly. 3114 * Must be atomic. 3115 * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This 3116 * is only used if the configured rate control algorithm actually uses 3117 * the new rate table API, and is therefore optional. Must be atomic. 3118 * 3119 * @sta_statistics: Get statistics for this station. For example with beacon 3120 * filtering, the statistics kept by mac80211 might not be accurate, so 3121 * let the driver pre-fill the statistics. The driver can fill most of 3122 * the values (indicating which by setting the filled bitmap), but not 3123 * all of them make sense - see the source for which ones are possible. 3124 * Statistics that the driver doesn't fill will be filled by mac80211. 3125 * The callback can sleep. 3126 * 3127 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 3128 * bursting) for a hardware TX queue. 3129 * Returns a negative error code on failure. 3130 * The callback can sleep. 3131 * 3132 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 3133 * this is only used for IBSS mode BSSID merging and debugging. Is not a 3134 * required function. 3135 * The callback can sleep. 3136 * 3137 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 3138 * Currently, this is only used for IBSS mode debugging. Is not a 3139 * required function. 3140 * The callback can sleep. 3141 * 3142 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 3143 * with other STAs in the IBSS. This is only used in IBSS mode. This 3144 * function is optional if the firmware/hardware takes full care of 3145 * TSF synchronization. 3146 * The callback can sleep. 3147 * 3148 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 3149 * This is needed only for IBSS mode and the result of this function is 3150 * used to determine whether to reply to Probe Requests. 3151 * Returns non-zero if this device sent the last beacon. 3152 * The callback can sleep. 3153 * 3154 * @ampdu_action: Perform a certain A-MPDU action 3155 * The RA/TID combination determines the destination and TID we want 3156 * the ampdu action to be performed for. The action is defined through 3157 * ieee80211_ampdu_mlme_action. 3158 * When the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL the driver 3159 * may neither send aggregates containing more subframes than @buf_size 3160 * nor send aggregates in a way that lost frames would exceed the 3161 * buffer size. If just limiting the aggregate size, this would be 3162 * possible with a buf_size of 8: 3163 * - TX: 1.....7 3164 * - RX: 2....7 (lost frame #1) 3165 * - TX: 8..1... 3166 * which is invalid since #1 was now re-transmitted well past the 3167 * buffer size of 8. Correct ways to retransmit #1 would be: 3168 * - TX: 1 or 18 or 81 3169 * Even "189" would be wrong since 1 could be lost again. 3170 * 3171 * Returns a negative error code on failure. 3172 * The callback can sleep. 3173 * 3174 * @get_survey: Return per-channel survey information 3175 * 3176 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 3177 * need to set wiphy->rfkill_poll to %true before registration, 3178 * and need to call wiphy_rfkill_set_hw_state() in the callback. 3179 * The callback can sleep. 3180 * 3181 * @set_coverage_class: Set slot time for given coverage class as specified 3182 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 3183 * accordingly; coverage class equals to -1 to enable ACK timeout 3184 * estimation algorithm (dynack). To disable dynack set valid value for 3185 * coverage class. This callback is not required and may sleep. 3186 * 3187 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 3188 * be %NULL. The callback can sleep. 3189 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 3190 * 3191 * @flush: Flush all pending frames from the hardware queue, making sure 3192 * that the hardware queues are empty. The @queues parameter is a bitmap 3193 * of queues to flush, which is useful if different virtual interfaces 3194 * use different hardware queues; it may also indicate all queues. 3195 * If the parameter @drop is set to %true, pending frames may be dropped. 3196 * Note that vif can be NULL. 3197 * The callback can sleep. 3198 * 3199 * @channel_switch: Drivers that need (or want) to offload the channel 3200 * switch operation for CSAs received from the AP may implement this 3201 * callback. They must then call ieee80211_chswitch_done() to indicate 3202 * completion of the channel switch. 3203 * 3204 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 3205 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 3206 * reject TX/RX mask combinations they cannot support by returning -EINVAL 3207 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 3208 * 3209 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 3210 * 3211 * @remain_on_channel: Starts an off-channel period on the given channel, must 3212 * call back to ieee80211_ready_on_channel() when on that channel. Note 3213 * that normal channel traffic is not stopped as this is intended for hw 3214 * offload. Frames to transmit on the off-channel channel are transmitted 3215 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 3216 * duration (which will always be non-zero) expires, the driver must call 3217 * ieee80211_remain_on_channel_expired(). 3218 * Note that this callback may be called while the device is in IDLE and 3219 * must be accepted in this case. 3220 * This callback may sleep. 3221 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 3222 * aborted before it expires. This callback may sleep. 3223 * 3224 * @set_ringparam: Set tx and rx ring sizes. 3225 * 3226 * @get_ringparam: Get tx and rx ring current and maximum sizes. 3227 * 3228 * @tx_frames_pending: Check if there is any pending frame in the hardware 3229 * queues before entering power save. 3230 * 3231 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 3232 * when transmitting a frame. Currently only legacy rates are handled. 3233 * The callback can sleep. 3234 * @event_callback: Notify driver about any event in mac80211. See 3235 * &enum ieee80211_event_type for the different types. 3236 * The callback must be atomic. 3237 * 3238 * @release_buffered_frames: Release buffered frames according to the given 3239 * parameters. In the case where the driver buffers some frames for 3240 * sleeping stations mac80211 will use this callback to tell the driver 3241 * to release some frames, either for PS-poll or uAPSD. 3242 * Note that if the @more_data parameter is %false the driver must check 3243 * if there are more frames on the given TIDs, and if there are more than 3244 * the frames being released then it must still set the more-data bit in 3245 * the frame. If the @more_data parameter is %true, then of course the 3246 * more-data bit must always be set. 3247 * The @tids parameter tells the driver which TIDs to release frames 3248 * from, for PS-poll it will always have only a single bit set. 3249 * In the case this is used for a PS-poll initiated release, the 3250 * @num_frames parameter will always be 1 so code can be shared. In 3251 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 3252 * on the TX status (and must report TX status) so that the PS-poll 3253 * period is properly ended. This is used to avoid sending multiple 3254 * responses for a retried PS-poll frame. 3255 * In the case this is used for uAPSD, the @num_frames parameter may be 3256 * bigger than one, but the driver may send fewer frames (it must send 3257 * at least one, however). In this case it is also responsible for 3258 * setting the EOSP flag in the QoS header of the frames. Also, when the 3259 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 3260 * on the last frame in the SP. Alternatively, it may call the function 3261 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 3262 * This callback must be atomic. 3263 * @allow_buffered_frames: Prepare device to allow the given number of frames 3264 * to go out to the given station. The frames will be sent by mac80211 3265 * via the usual TX path after this call. The TX information for frames 3266 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 3267 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 3268 * frames from multiple TIDs are released and the driver might reorder 3269 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 3270 * on the last frame and clear it on all others and also handle the EOSP 3271 * bit in the QoS header correctly. Alternatively, it can also call the 3272 * ieee80211_sta_eosp() function. 3273 * The @tids parameter is a bitmap and tells the driver which TIDs the 3274 * frames will be on; it will at most have two bits set. 3275 * This callback must be atomic. 3276 * 3277 * @get_et_sset_count: Ethtool API to get string-set count. 3278 * 3279 * @get_et_stats: Ethtool API to get a set of u64 stats. 3280 * 3281 * @get_et_strings: Ethtool API to get a set of strings to describe stats 3282 * and perhaps other supported types of ethtool data-sets. 3283 * 3284 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 3285 * before associated. In multi-channel scenarios, a virtual interface is 3286 * bound to a channel before it is associated, but as it isn't associated 3287 * yet it need not necessarily be given airtime, in particular since any 3288 * transmission to a P2P GO needs to be synchronized against the GO's 3289 * powersave state. mac80211 will call this function before transmitting a 3290 * management frame prior to having successfully associated to allow the 3291 * driver to give it channel time for the transmission, to get a response 3292 * and to be able to synchronize with the GO. 3293 * The callback will be called before each transmission and upon return 3294 * mac80211 will transmit the frame right away. 3295 * The callback is optional and can (should!) sleep. 3296 * 3297 * @mgd_protect_tdls_discover: Protect a TDLS discovery session. After sending 3298 * a TDLS discovery-request, we expect a reply to arrive on the AP's 3299 * channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS 3300 * setup-response is a direct packet not buffered by the AP. 3301 * mac80211 will call this function just before the transmission of a TDLS 3302 * discovery-request. The recommended period of protection is at least 3303 * 2 * (DTIM period). 3304 * The callback is optional and can sleep. 3305 * 3306 * @add_chanctx: Notifies device driver about new channel context creation. 3307 * This callback may sleep. 3308 * @remove_chanctx: Notifies device driver about channel context destruction. 3309 * This callback may sleep. 3310 * @change_chanctx: Notifies device driver about channel context changes that 3311 * may happen when combining different virtual interfaces on the same 3312 * channel context with different settings 3313 * This callback may sleep. 3314 * @assign_vif_chanctx: Notifies device driver about channel context being bound 3315 * to vif. Possible use is for hw queue remapping. 3316 * This callback may sleep. 3317 * @unassign_vif_chanctx: Notifies device driver about channel context being 3318 * unbound from vif. 3319 * This callback may sleep. 3320 * @switch_vif_chanctx: switch a number of vifs from one chanctx to 3321 * another, as specified in the list of 3322 * @ieee80211_vif_chanctx_switch passed to the driver, according 3323 * to the mode defined in &ieee80211_chanctx_switch_mode. 3324 * This callback may sleep. 3325 * 3326 * @start_ap: Start operation on the AP interface, this is called after all the 3327 * information in bss_conf is set and beacon can be retrieved. A channel 3328 * context is bound before this is called. Note that if the driver uses 3329 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 3330 * just "paused" for scanning/ROC, which is indicated by the beacon being 3331 * disabled/enabled via @bss_info_changed. 3332 * @stop_ap: Stop operation on the AP interface. 3333 * 3334 * @reconfig_complete: Called after a call to ieee80211_restart_hw() and 3335 * during resume, when the reconfiguration has completed. 3336 * This can help the driver implement the reconfiguration step (and 3337 * indicate mac80211 is ready to receive frames). 3338 * This callback may sleep. 3339 * 3340 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 3341 * Currently, this is only called for managed or P2P client interfaces. 3342 * This callback is optional; it must not sleep. 3343 * 3344 * @channel_switch_beacon: Starts a channel switch to a new channel. 3345 * Beacons are modified to include CSA or ECSA IEs before calling this 3346 * function. The corresponding count fields in these IEs must be 3347 * decremented, and when they reach 1 the driver must call 3348 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 3349 * get the csa counter decremented by mac80211, but must check if it is 3350 * 1 using ieee80211_csa_is_complete() after the beacon has been 3351 * transmitted and then call ieee80211_csa_finish(). 3352 * If the CSA count starts as zero or 1, this function will not be called, 3353 * since there won't be any time to beacon before the switch anyway. 3354 * @pre_channel_switch: This is an optional callback that is called 3355 * before a channel switch procedure is started (ie. when a STA 3356 * gets a CSA or an userspace initiated channel-switch), allowing 3357 * the driver to prepare for the channel switch. 3358 * @post_channel_switch: This is an optional callback that is called 3359 * after a channel switch procedure is completed, allowing the 3360 * driver to go back to a normal configuration. 3361 * 3362 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 3363 * information in bss_conf is set up and the beacon can be retrieved. A 3364 * channel context is bound before this is called. 3365 * @leave_ibss: Leave the IBSS again. 3366 * 3367 * @get_expected_throughput: extract the expected throughput towards the 3368 * specified station. The returned value is expressed in Kbps. It returns 0 3369 * if the RC algorithm does not have proper data to provide. 3370 * 3371 * @get_txpower: get current maximum tx power (in dBm) based on configuration 3372 * and hardware limits. 3373 * 3374 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver 3375 * is responsible for continually initiating channel-switching operations 3376 * and returning to the base channel for communication with the AP. The 3377 * driver receives a channel-switch request template and the location of 3378 * the switch-timing IE within the template as part of the invocation. 3379 * The template is valid only within the call, and the driver can 3380 * optionally copy the skb for further re-use. 3381 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both 3382 * peers must be on the base channel when the call completes. 3383 * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or 3384 * response) has been received from a remote peer. The driver gets 3385 * parameters parsed from the incoming frame and may use them to continue 3386 * an ongoing channel-switch operation. In addition, a channel-switch 3387 * response template is provided, together with the location of the 3388 * switch-timing IE within the template. The skb can only be used within 3389 * the function call. 3390 * 3391 * @wake_tx_queue: Called when new packets have been added to the queue. 3392 * @sync_rx_queues: Process all pending frames in RSS queues. This is a 3393 * synchronization which is needed in case driver has in its RSS queues 3394 * pending frames that were received prior to the control path action 3395 * currently taken (e.g. disassociation) but are not processed yet. 3396 */ 3397 struct ieee80211_ops { 3398 void (*tx)(struct ieee80211_hw *hw, 3399 struct ieee80211_tx_control *control, 3400 struct sk_buff *skb); 3401 int (*start)(struct ieee80211_hw *hw); 3402 void (*stop)(struct ieee80211_hw *hw); 3403 #ifdef CONFIG_PM 3404 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 3405 int (*resume)(struct ieee80211_hw *hw); 3406 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 3407 #endif 3408 int (*add_interface)(struct ieee80211_hw *hw, 3409 struct ieee80211_vif *vif); 3410 int (*change_interface)(struct ieee80211_hw *hw, 3411 struct ieee80211_vif *vif, 3412 enum nl80211_iftype new_type, bool p2p); 3413 void (*remove_interface)(struct ieee80211_hw *hw, 3414 struct ieee80211_vif *vif); 3415 int (*config)(struct ieee80211_hw *hw, u32 changed); 3416 void (*bss_info_changed)(struct ieee80211_hw *hw, 3417 struct ieee80211_vif *vif, 3418 struct ieee80211_bss_conf *info, 3419 u32 changed); 3420 3421 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3422 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3423 3424 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 3425 struct netdev_hw_addr_list *mc_list); 3426 void (*configure_filter)(struct ieee80211_hw *hw, 3427 unsigned int changed_flags, 3428 unsigned int *total_flags, 3429 u64 multicast); 3430 void (*config_iface_filter)(struct ieee80211_hw *hw, 3431 struct ieee80211_vif *vif, 3432 unsigned int filter_flags, 3433 unsigned int changed_flags); 3434 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3435 bool set); 3436 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 3437 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 3438 struct ieee80211_key_conf *key); 3439 void (*update_tkip_key)(struct ieee80211_hw *hw, 3440 struct ieee80211_vif *vif, 3441 struct ieee80211_key_conf *conf, 3442 struct ieee80211_sta *sta, 3443 u32 iv32, u16 *phase1key); 3444 void (*set_rekey_data)(struct ieee80211_hw *hw, 3445 struct ieee80211_vif *vif, 3446 struct cfg80211_gtk_rekey_data *data); 3447 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 3448 struct ieee80211_vif *vif, int idx); 3449 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3450 struct ieee80211_scan_request *req); 3451 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 3452 struct ieee80211_vif *vif); 3453 int (*sched_scan_start)(struct ieee80211_hw *hw, 3454 struct ieee80211_vif *vif, 3455 struct cfg80211_sched_scan_request *req, 3456 struct ieee80211_scan_ies *ies); 3457 int (*sched_scan_stop)(struct ieee80211_hw *hw, 3458 struct ieee80211_vif *vif); 3459 void (*sw_scan_start)(struct ieee80211_hw *hw, 3460 struct ieee80211_vif *vif, 3461 const u8 *mac_addr); 3462 void (*sw_scan_complete)(struct ieee80211_hw *hw, 3463 struct ieee80211_vif *vif); 3464 int (*get_stats)(struct ieee80211_hw *hw, 3465 struct ieee80211_low_level_stats *stats); 3466 void (*get_key_seq)(struct ieee80211_hw *hw, 3467 struct ieee80211_key_conf *key, 3468 struct ieee80211_key_seq *seq); 3469 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 3470 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 3471 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3472 struct ieee80211_sta *sta); 3473 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3474 struct ieee80211_sta *sta); 3475 #ifdef CONFIG_MAC80211_DEBUGFS 3476 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 3477 struct ieee80211_vif *vif, 3478 struct ieee80211_sta *sta, 3479 struct dentry *dir); 3480 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 3481 struct ieee80211_vif *vif, 3482 struct ieee80211_sta *sta, 3483 struct dentry *dir); 3484 #endif 3485 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3486 enum sta_notify_cmd, struct ieee80211_sta *sta); 3487 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3488 struct ieee80211_sta *sta, 3489 enum ieee80211_sta_state old_state, 3490 enum ieee80211_sta_state new_state); 3491 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 3492 struct ieee80211_vif *vif, 3493 struct ieee80211_sta *sta); 3494 void (*sta_rc_update)(struct ieee80211_hw *hw, 3495 struct ieee80211_vif *vif, 3496 struct ieee80211_sta *sta, 3497 u32 changed); 3498 void (*sta_rate_tbl_update)(struct ieee80211_hw *hw, 3499 struct ieee80211_vif *vif, 3500 struct ieee80211_sta *sta); 3501 void (*sta_statistics)(struct ieee80211_hw *hw, 3502 struct ieee80211_vif *vif, 3503 struct ieee80211_sta *sta, 3504 struct station_info *sinfo); 3505 int (*conf_tx)(struct ieee80211_hw *hw, 3506 struct ieee80211_vif *vif, u16 ac, 3507 const struct ieee80211_tx_queue_params *params); 3508 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3509 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3510 u64 tsf); 3511 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3512 int (*tx_last_beacon)(struct ieee80211_hw *hw); 3513 int (*ampdu_action)(struct ieee80211_hw *hw, 3514 struct ieee80211_vif *vif, 3515 struct ieee80211_ampdu_params *params); 3516 int (*get_survey)(struct ieee80211_hw *hw, int idx, 3517 struct survey_info *survey); 3518 void (*rfkill_poll)(struct ieee80211_hw *hw); 3519 void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class); 3520 #ifdef CONFIG_NL80211_TESTMODE 3521 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3522 void *data, int len); 3523 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 3524 struct netlink_callback *cb, 3525 void *data, int len); 3526 #endif 3527 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3528 u32 queues, bool drop); 3529 void (*channel_switch)(struct ieee80211_hw *hw, 3530 struct ieee80211_vif *vif, 3531 struct ieee80211_channel_switch *ch_switch); 3532 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 3533 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 3534 3535 int (*remain_on_channel)(struct ieee80211_hw *hw, 3536 struct ieee80211_vif *vif, 3537 struct ieee80211_channel *chan, 3538 int duration, 3539 enum ieee80211_roc_type type); 3540 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 3541 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 3542 void (*get_ringparam)(struct ieee80211_hw *hw, 3543 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 3544 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 3545 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3546 const struct cfg80211_bitrate_mask *mask); 3547 void (*event_callback)(struct ieee80211_hw *hw, 3548 struct ieee80211_vif *vif, 3549 const struct ieee80211_event *event); 3550 3551 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 3552 struct ieee80211_sta *sta, 3553 u16 tids, int num_frames, 3554 enum ieee80211_frame_release_type reason, 3555 bool more_data); 3556 void (*release_buffered_frames)(struct ieee80211_hw *hw, 3557 struct ieee80211_sta *sta, 3558 u16 tids, int num_frames, 3559 enum ieee80211_frame_release_type reason, 3560 bool more_data); 3561 3562 int (*get_et_sset_count)(struct ieee80211_hw *hw, 3563 struct ieee80211_vif *vif, int sset); 3564 void (*get_et_stats)(struct ieee80211_hw *hw, 3565 struct ieee80211_vif *vif, 3566 struct ethtool_stats *stats, u64 *data); 3567 void (*get_et_strings)(struct ieee80211_hw *hw, 3568 struct ieee80211_vif *vif, 3569 u32 sset, u8 *data); 3570 3571 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 3572 struct ieee80211_vif *vif); 3573 3574 void (*mgd_protect_tdls_discover)(struct ieee80211_hw *hw, 3575 struct ieee80211_vif *vif); 3576 3577 int (*add_chanctx)(struct ieee80211_hw *hw, 3578 struct ieee80211_chanctx_conf *ctx); 3579 void (*remove_chanctx)(struct ieee80211_hw *hw, 3580 struct ieee80211_chanctx_conf *ctx); 3581 void (*change_chanctx)(struct ieee80211_hw *hw, 3582 struct ieee80211_chanctx_conf *ctx, 3583 u32 changed); 3584 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 3585 struct ieee80211_vif *vif, 3586 struct ieee80211_chanctx_conf *ctx); 3587 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 3588 struct ieee80211_vif *vif, 3589 struct ieee80211_chanctx_conf *ctx); 3590 int (*switch_vif_chanctx)(struct ieee80211_hw *hw, 3591 struct ieee80211_vif_chanctx_switch *vifs, 3592 int n_vifs, 3593 enum ieee80211_chanctx_switch_mode mode); 3594 3595 void (*reconfig_complete)(struct ieee80211_hw *hw, 3596 enum ieee80211_reconfig_type reconfig_type); 3597 3598 #if IS_ENABLED(CONFIG_IPV6) 3599 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 3600 struct ieee80211_vif *vif, 3601 struct inet6_dev *idev); 3602 #endif 3603 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 3604 struct ieee80211_vif *vif, 3605 struct cfg80211_chan_def *chandef); 3606 int (*pre_channel_switch)(struct ieee80211_hw *hw, 3607 struct ieee80211_vif *vif, 3608 struct ieee80211_channel_switch *ch_switch); 3609 3610 int (*post_channel_switch)(struct ieee80211_hw *hw, 3611 struct ieee80211_vif *vif); 3612 3613 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3614 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3615 u32 (*get_expected_throughput)(struct ieee80211_sta *sta); 3616 int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3617 int *dbm); 3618 3619 int (*tdls_channel_switch)(struct ieee80211_hw *hw, 3620 struct ieee80211_vif *vif, 3621 struct ieee80211_sta *sta, u8 oper_class, 3622 struct cfg80211_chan_def *chandef, 3623 struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie); 3624 void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw, 3625 struct ieee80211_vif *vif, 3626 struct ieee80211_sta *sta); 3627 void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw, 3628 struct ieee80211_vif *vif, 3629 struct ieee80211_tdls_ch_sw_params *params); 3630 3631 void (*wake_tx_queue)(struct ieee80211_hw *hw, 3632 struct ieee80211_txq *txq); 3633 void (*sync_rx_queues)(struct ieee80211_hw *hw); 3634 }; 3635 3636 /** 3637 * ieee80211_alloc_hw_nm - Allocate a new hardware device 3638 * 3639 * This must be called once for each hardware device. The returned pointer 3640 * must be used to refer to this device when calling other functions. 3641 * mac80211 allocates a private data area for the driver pointed to by 3642 * @priv in &struct ieee80211_hw, the size of this area is given as 3643 * @priv_data_len. 3644 * 3645 * @priv_data_len: length of private data 3646 * @ops: callbacks for this device 3647 * @requested_name: Requested name for this device. 3648 * NULL is valid value, and means use the default naming (phy%d) 3649 * 3650 * Return: A pointer to the new hardware device, or %NULL on error. 3651 */ 3652 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 3653 const struct ieee80211_ops *ops, 3654 const char *requested_name); 3655 3656 /** 3657 * ieee80211_alloc_hw - Allocate a new hardware device 3658 * 3659 * This must be called once for each hardware device. The returned pointer 3660 * must be used to refer to this device when calling other functions. 3661 * mac80211 allocates a private data area for the driver pointed to by 3662 * @priv in &struct ieee80211_hw, the size of this area is given as 3663 * @priv_data_len. 3664 * 3665 * @priv_data_len: length of private data 3666 * @ops: callbacks for this device 3667 * 3668 * Return: A pointer to the new hardware device, or %NULL on error. 3669 */ 3670 static inline 3671 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 3672 const struct ieee80211_ops *ops) 3673 { 3674 return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL); 3675 } 3676 3677 /** 3678 * ieee80211_register_hw - Register hardware device 3679 * 3680 * You must call this function before any other functions in 3681 * mac80211. Note that before a hardware can be registered, you 3682 * need to fill the contained wiphy's information. 3683 * 3684 * @hw: the device to register as returned by ieee80211_alloc_hw() 3685 * 3686 * Return: 0 on success. An error code otherwise. 3687 */ 3688 int ieee80211_register_hw(struct ieee80211_hw *hw); 3689 3690 /** 3691 * struct ieee80211_tpt_blink - throughput blink description 3692 * @throughput: throughput in Kbit/sec 3693 * @blink_time: blink time in milliseconds 3694 * (full cycle, ie. one off + one on period) 3695 */ 3696 struct ieee80211_tpt_blink { 3697 int throughput; 3698 int blink_time; 3699 }; 3700 3701 /** 3702 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3703 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3704 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3705 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3706 * interface is connected in some way, including being an AP 3707 */ 3708 enum ieee80211_tpt_led_trigger_flags { 3709 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3710 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3711 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3712 }; 3713 3714 #ifdef CONFIG_MAC80211_LEDS 3715 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3716 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3717 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3718 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3719 const char * 3720 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3721 unsigned int flags, 3722 const struct ieee80211_tpt_blink *blink_table, 3723 unsigned int blink_table_len); 3724 #endif 3725 /** 3726 * ieee80211_get_tx_led_name - get name of TX LED 3727 * 3728 * mac80211 creates a transmit LED trigger for each wireless hardware 3729 * that can be used to drive LEDs if your driver registers a LED device. 3730 * This function returns the name (or %NULL if not configured for LEDs) 3731 * of the trigger so you can automatically link the LED device. 3732 * 3733 * @hw: the hardware to get the LED trigger name for 3734 * 3735 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3736 */ 3737 static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3738 { 3739 #ifdef CONFIG_MAC80211_LEDS 3740 return __ieee80211_get_tx_led_name(hw); 3741 #else 3742 return NULL; 3743 #endif 3744 } 3745 3746 /** 3747 * ieee80211_get_rx_led_name - get name of RX LED 3748 * 3749 * mac80211 creates a receive LED trigger for each wireless hardware 3750 * that can be used to drive LEDs if your driver registers a LED device. 3751 * This function returns the name (or %NULL if not configured for LEDs) 3752 * of the trigger so you can automatically link the LED device. 3753 * 3754 * @hw: the hardware to get the LED trigger name for 3755 * 3756 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3757 */ 3758 static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3759 { 3760 #ifdef CONFIG_MAC80211_LEDS 3761 return __ieee80211_get_rx_led_name(hw); 3762 #else 3763 return NULL; 3764 #endif 3765 } 3766 3767 /** 3768 * ieee80211_get_assoc_led_name - get name of association LED 3769 * 3770 * mac80211 creates a association LED trigger for each wireless hardware 3771 * that can be used to drive LEDs if your driver registers a LED device. 3772 * This function returns the name (or %NULL if not configured for LEDs) 3773 * of the trigger so you can automatically link the LED device. 3774 * 3775 * @hw: the hardware to get the LED trigger name for 3776 * 3777 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3778 */ 3779 static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3780 { 3781 #ifdef CONFIG_MAC80211_LEDS 3782 return __ieee80211_get_assoc_led_name(hw); 3783 #else 3784 return NULL; 3785 #endif 3786 } 3787 3788 /** 3789 * ieee80211_get_radio_led_name - get name of radio LED 3790 * 3791 * mac80211 creates a radio change LED trigger for each wireless hardware 3792 * that can be used to drive LEDs if your driver registers a LED device. 3793 * This function returns the name (or %NULL if not configured for LEDs) 3794 * of the trigger so you can automatically link the LED device. 3795 * 3796 * @hw: the hardware to get the LED trigger name for 3797 * 3798 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3799 */ 3800 static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3801 { 3802 #ifdef CONFIG_MAC80211_LEDS 3803 return __ieee80211_get_radio_led_name(hw); 3804 #else 3805 return NULL; 3806 #endif 3807 } 3808 3809 /** 3810 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3811 * @hw: the hardware to create the trigger for 3812 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3813 * @blink_table: the blink table -- needs to be ordered by throughput 3814 * @blink_table_len: size of the blink table 3815 * 3816 * Return: %NULL (in case of error, or if no LED triggers are 3817 * configured) or the name of the new trigger. 3818 * 3819 * Note: This function must be called before ieee80211_register_hw(). 3820 */ 3821 static inline const char * 3822 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3823 const struct ieee80211_tpt_blink *blink_table, 3824 unsigned int blink_table_len) 3825 { 3826 #ifdef CONFIG_MAC80211_LEDS 3827 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3828 blink_table_len); 3829 #else 3830 return NULL; 3831 #endif 3832 } 3833 3834 /** 3835 * ieee80211_unregister_hw - Unregister a hardware device 3836 * 3837 * This function instructs mac80211 to free allocated resources 3838 * and unregister netdevices from the networking subsystem. 3839 * 3840 * @hw: the hardware to unregister 3841 */ 3842 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3843 3844 /** 3845 * ieee80211_free_hw - free hardware descriptor 3846 * 3847 * This function frees everything that was allocated, including the 3848 * private data for the driver. You must call ieee80211_unregister_hw() 3849 * before calling this function. 3850 * 3851 * @hw: the hardware to free 3852 */ 3853 void ieee80211_free_hw(struct ieee80211_hw *hw); 3854 3855 /** 3856 * ieee80211_restart_hw - restart hardware completely 3857 * 3858 * Call this function when the hardware was restarted for some reason 3859 * (hardware error, ...) and the driver is unable to restore its state 3860 * by itself. mac80211 assumes that at this point the driver/hardware 3861 * is completely uninitialised and stopped, it starts the process by 3862 * calling the ->start() operation. The driver will need to reset all 3863 * internal state that it has prior to calling this function. 3864 * 3865 * @hw: the hardware to restart 3866 */ 3867 void ieee80211_restart_hw(struct ieee80211_hw *hw); 3868 3869 /** 3870 * ieee80211_rx_napi - receive frame from NAPI context 3871 * 3872 * Use this function to hand received frames to mac80211. The receive 3873 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3874 * paged @skb is used, the driver is recommended to put the ieee80211 3875 * header of the frame on the linear part of the @skb to avoid memory 3876 * allocation and/or memcpy by the stack. 3877 * 3878 * This function may not be called in IRQ context. Calls to this function 3879 * for a single hardware must be synchronized against each other. Calls to 3880 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3881 * mixed for a single hardware. Must not run concurrently with 3882 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3883 * 3884 * This function must be called with BHs disabled. 3885 * 3886 * @hw: the hardware this frame came in on 3887 * @sta: the station the frame was received from, or %NULL 3888 * @skb: the buffer to receive, owned by mac80211 after this call 3889 * @napi: the NAPI context 3890 */ 3891 void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3892 struct sk_buff *skb, struct napi_struct *napi); 3893 3894 /** 3895 * ieee80211_rx - receive frame 3896 * 3897 * Use this function to hand received frames to mac80211. The receive 3898 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3899 * paged @skb is used, the driver is recommended to put the ieee80211 3900 * header of the frame on the linear part of the @skb to avoid memory 3901 * allocation and/or memcpy by the stack. 3902 * 3903 * This function may not be called in IRQ context. Calls to this function 3904 * for a single hardware must be synchronized against each other. Calls to 3905 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3906 * mixed for a single hardware. Must not run concurrently with 3907 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3908 * 3909 * In process context use instead ieee80211_rx_ni(). 3910 * 3911 * @hw: the hardware this frame came in on 3912 * @skb: the buffer to receive, owned by mac80211 after this call 3913 */ 3914 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) 3915 { 3916 ieee80211_rx_napi(hw, NULL, skb, NULL); 3917 } 3918 3919 /** 3920 * ieee80211_rx_irqsafe - receive frame 3921 * 3922 * Like ieee80211_rx() but can be called in IRQ context 3923 * (internally defers to a tasklet.) 3924 * 3925 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3926 * be mixed for a single hardware.Must not run concurrently with 3927 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3928 * 3929 * @hw: the hardware this frame came in on 3930 * @skb: the buffer to receive, owned by mac80211 after this call 3931 */ 3932 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3933 3934 /** 3935 * ieee80211_rx_ni - receive frame (in process context) 3936 * 3937 * Like ieee80211_rx() but can be called in process context 3938 * (internally disables bottom halves). 3939 * 3940 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3941 * not be mixed for a single hardware. Must not run concurrently with 3942 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3943 * 3944 * @hw: the hardware this frame came in on 3945 * @skb: the buffer to receive, owned by mac80211 after this call 3946 */ 3947 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3948 struct sk_buff *skb) 3949 { 3950 local_bh_disable(); 3951 ieee80211_rx(hw, skb); 3952 local_bh_enable(); 3953 } 3954 3955 /** 3956 * ieee80211_sta_ps_transition - PS transition for connected sta 3957 * 3958 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3959 * flag set, use this function to inform mac80211 about a connected station 3960 * entering/leaving PS mode. 3961 * 3962 * This function may not be called in IRQ context or with softirqs enabled. 3963 * 3964 * Calls to this function for a single hardware must be synchronized against 3965 * each other. 3966 * 3967 * @sta: currently connected sta 3968 * @start: start or stop PS 3969 * 3970 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3971 */ 3972 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3973 3974 /** 3975 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3976 * (in process context) 3977 * 3978 * Like ieee80211_sta_ps_transition() but can be called in process context 3979 * (internally disables bottom halves). Concurrent call restriction still 3980 * applies. 3981 * 3982 * @sta: currently connected sta 3983 * @start: start or stop PS 3984 * 3985 * Return: Like ieee80211_sta_ps_transition(). 3986 */ 3987 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3988 bool start) 3989 { 3990 int ret; 3991 3992 local_bh_disable(); 3993 ret = ieee80211_sta_ps_transition(sta, start); 3994 local_bh_enable(); 3995 3996 return ret; 3997 } 3998 3999 /** 4000 * ieee80211_sta_pspoll - PS-Poll frame received 4001 * @sta: currently connected station 4002 * 4003 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4004 * use this function to inform mac80211 that a PS-Poll frame from a 4005 * connected station was received. 4006 * This must be used in conjunction with ieee80211_sta_ps_transition() 4007 * and possibly ieee80211_sta_uapsd_trigger(); calls to all three must 4008 * be serialized. 4009 */ 4010 void ieee80211_sta_pspoll(struct ieee80211_sta *sta); 4011 4012 /** 4013 * ieee80211_sta_uapsd_trigger - (potential) U-APSD trigger frame received 4014 * @sta: currently connected station 4015 * @tid: TID of the received (potential) trigger frame 4016 * 4017 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4018 * use this function to inform mac80211 that a (potential) trigger frame 4019 * from a connected station was received. 4020 * This must be used in conjunction with ieee80211_sta_ps_transition() 4021 * and possibly ieee80211_sta_pspoll(); calls to all three must be 4022 * serialized. 4023 */ 4024 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid); 4025 4026 /* 4027 * The TX headroom reserved by mac80211 for its own tx_status functions. 4028 * This is enough for the radiotap header. 4029 */ 4030 #define IEEE80211_TX_STATUS_HEADROOM 14 4031 4032 /** 4033 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 4034 * @sta: &struct ieee80211_sta pointer for the sleeping station 4035 * @tid: the TID that has buffered frames 4036 * @buffered: indicates whether or not frames are buffered for this TID 4037 * 4038 * If a driver buffers frames for a powersave station instead of passing 4039 * them back to mac80211 for retransmission, the station may still need 4040 * to be told that there are buffered frames via the TIM bit. 4041 * 4042 * This function informs mac80211 whether or not there are frames that are 4043 * buffered in the driver for a given TID; mac80211 can then use this data 4044 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 4045 * call! Beware of the locking!) 4046 * 4047 * If all frames are released to the station (due to PS-poll or uAPSD) 4048 * then the driver needs to inform mac80211 that there no longer are 4049 * frames buffered. However, when the station wakes up mac80211 assumes 4050 * that all buffered frames will be transmitted and clears this data, 4051 * drivers need to make sure they inform mac80211 about all buffered 4052 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 4053 * 4054 * Note that technically mac80211 only needs to know this per AC, not per 4055 * TID, but since driver buffering will inevitably happen per TID (since 4056 * it is related to aggregation) it is easier to make mac80211 map the 4057 * TID to the AC as required instead of keeping track in all drivers that 4058 * use this API. 4059 */ 4060 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 4061 u8 tid, bool buffered); 4062 4063 /** 4064 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 4065 * 4066 * Call this function in a driver with per-packet rate selection support 4067 * to combine the rate info in the packet tx info with the most recent 4068 * rate selection table for the station entry. 4069 * 4070 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4071 * @sta: the receiver station to which this packet is sent. 4072 * @skb: the frame to be transmitted. 4073 * @dest: buffer for extracted rate/retry information 4074 * @max_rates: maximum number of rates to fetch 4075 */ 4076 void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 4077 struct ieee80211_sta *sta, 4078 struct sk_buff *skb, 4079 struct ieee80211_tx_rate *dest, 4080 int max_rates); 4081 4082 /** 4083 * ieee80211_tx_status - transmit status callback 4084 * 4085 * Call this function for all transmitted frames after they have been 4086 * transmitted. It is permissible to not call this function for 4087 * multicast frames but this can affect statistics. 4088 * 4089 * This function may not be called in IRQ context. Calls to this function 4090 * for a single hardware must be synchronized against each other. Calls 4091 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 4092 * may not be mixed for a single hardware. Must not run concurrently with 4093 * ieee80211_rx() or ieee80211_rx_ni(). 4094 * 4095 * @hw: the hardware the frame was transmitted by 4096 * @skb: the frame that was transmitted, owned by mac80211 after this call 4097 */ 4098 void ieee80211_tx_status(struct ieee80211_hw *hw, 4099 struct sk_buff *skb); 4100 4101 /** 4102 * ieee80211_tx_status_noskb - transmit status callback without skb 4103 * 4104 * This function can be used as a replacement for ieee80211_tx_status 4105 * in drivers that cannot reliably map tx status information back to 4106 * specific skbs. 4107 * 4108 * Calls to this function for a single hardware must be synchronized 4109 * against each other. Calls to this function, ieee80211_tx_status_ni() 4110 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware. 4111 * 4112 * @hw: the hardware the frame was transmitted by 4113 * @sta: the receiver station to which this packet is sent 4114 * (NULL for multicast packets) 4115 * @info: tx status information 4116 */ 4117 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, 4118 struct ieee80211_sta *sta, 4119 struct ieee80211_tx_info *info); 4120 4121 /** 4122 * ieee80211_tx_status_ni - transmit status callback (in process context) 4123 * 4124 * Like ieee80211_tx_status() but can be called in process context. 4125 * 4126 * Calls to this function, ieee80211_tx_status() and 4127 * ieee80211_tx_status_irqsafe() may not be mixed 4128 * for a single hardware. 4129 * 4130 * @hw: the hardware the frame was transmitted by 4131 * @skb: the frame that was transmitted, owned by mac80211 after this call 4132 */ 4133 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 4134 struct sk_buff *skb) 4135 { 4136 local_bh_disable(); 4137 ieee80211_tx_status(hw, skb); 4138 local_bh_enable(); 4139 } 4140 4141 /** 4142 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 4143 * 4144 * Like ieee80211_tx_status() but can be called in IRQ context 4145 * (internally defers to a tasklet.) 4146 * 4147 * Calls to this function, ieee80211_tx_status() and 4148 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 4149 * 4150 * @hw: the hardware the frame was transmitted by 4151 * @skb: the frame that was transmitted, owned by mac80211 after this call 4152 */ 4153 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 4154 struct sk_buff *skb); 4155 4156 /** 4157 * ieee80211_report_low_ack - report non-responding station 4158 * 4159 * When operating in AP-mode, call this function to report a non-responding 4160 * connected STA. 4161 * 4162 * @sta: the non-responding connected sta 4163 * @num_packets: number of packets sent to @sta without a response 4164 */ 4165 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 4166 4167 #define IEEE80211_MAX_CSA_COUNTERS_NUM 2 4168 4169 /** 4170 * struct ieee80211_mutable_offsets - mutable beacon offsets 4171 * @tim_offset: position of TIM element 4172 * @tim_length: size of TIM element 4173 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets 4174 * to CSA counters. This array can contain zero values which 4175 * should be ignored. 4176 */ 4177 struct ieee80211_mutable_offsets { 4178 u16 tim_offset; 4179 u16 tim_length; 4180 4181 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; 4182 }; 4183 4184 /** 4185 * ieee80211_beacon_get_template - beacon template generation function 4186 * @hw: pointer obtained from ieee80211_alloc_hw(). 4187 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4188 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will 4189 * receive the offsets that may be updated by the driver. 4190 * 4191 * If the driver implements beaconing modes, it must use this function to 4192 * obtain the beacon template. 4193 * 4194 * This function should be used if the beacon frames are generated by the 4195 * device, and then the driver must use the returned beacon as the template 4196 * The driver or the device are responsible to update the DTIM and, when 4197 * applicable, the CSA count. 4198 * 4199 * The driver is responsible for freeing the returned skb. 4200 * 4201 * Return: The beacon template. %NULL on error. 4202 */ 4203 struct sk_buff * 4204 ieee80211_beacon_get_template(struct ieee80211_hw *hw, 4205 struct ieee80211_vif *vif, 4206 struct ieee80211_mutable_offsets *offs); 4207 4208 /** 4209 * ieee80211_beacon_get_tim - beacon generation function 4210 * @hw: pointer obtained from ieee80211_alloc_hw(). 4211 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4212 * @tim_offset: pointer to variable that will receive the TIM IE offset. 4213 * Set to 0 if invalid (in non-AP modes). 4214 * @tim_length: pointer to variable that will receive the TIM IE length, 4215 * (including the ID and length bytes!). 4216 * Set to 0 if invalid (in non-AP modes). 4217 * 4218 * If the driver implements beaconing modes, it must use this function to 4219 * obtain the beacon frame. 4220 * 4221 * If the beacon frames are generated by the host system (i.e., not in 4222 * hardware/firmware), the driver uses this function to get each beacon 4223 * frame from mac80211 -- it is responsible for calling this function exactly 4224 * once before the beacon is needed (e.g. based on hardware interrupt). 4225 * 4226 * The driver is responsible for freeing the returned skb. 4227 * 4228 * Return: The beacon template. %NULL on error. 4229 */ 4230 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 4231 struct ieee80211_vif *vif, 4232 u16 *tim_offset, u16 *tim_length); 4233 4234 /** 4235 * ieee80211_beacon_get - beacon generation function 4236 * @hw: pointer obtained from ieee80211_alloc_hw(). 4237 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4238 * 4239 * See ieee80211_beacon_get_tim(). 4240 * 4241 * Return: See ieee80211_beacon_get_tim(). 4242 */ 4243 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 4244 struct ieee80211_vif *vif) 4245 { 4246 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 4247 } 4248 4249 /** 4250 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter 4251 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4252 * 4253 * The csa counter should be updated after each beacon transmission. 4254 * This function is called implicitly when 4255 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the 4256 * beacon frames are generated by the device, the driver should call this 4257 * function after each beacon transmission to sync mac80211's csa counters. 4258 * 4259 * Return: new csa counter value 4260 */ 4261 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif); 4262 4263 /** 4264 * ieee80211_csa_finish - notify mac80211 about channel switch 4265 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4266 * 4267 * After a channel switch announcement was scheduled and the counter in this 4268 * announcement hits 1, this function must be called by the driver to 4269 * notify mac80211 that the channel can be changed. 4270 */ 4271 void ieee80211_csa_finish(struct ieee80211_vif *vif); 4272 4273 /** 4274 * ieee80211_csa_is_complete - find out if counters reached 1 4275 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4276 * 4277 * This function returns whether the channel switch counters reached zero. 4278 */ 4279 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 4280 4281 4282 /** 4283 * ieee80211_proberesp_get - retrieve a Probe Response template 4284 * @hw: pointer obtained from ieee80211_alloc_hw(). 4285 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4286 * 4287 * Creates a Probe Response template which can, for example, be uploaded to 4288 * hardware. The destination address should be set by the caller. 4289 * 4290 * Can only be called in AP mode. 4291 * 4292 * Return: The Probe Response template. %NULL on error. 4293 */ 4294 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 4295 struct ieee80211_vif *vif); 4296 4297 /** 4298 * ieee80211_pspoll_get - retrieve a PS Poll template 4299 * @hw: pointer obtained from ieee80211_alloc_hw(). 4300 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4301 * 4302 * Creates a PS Poll a template which can, for example, uploaded to 4303 * hardware. The template must be updated after association so that correct 4304 * AID, BSSID and MAC address is used. 4305 * 4306 * Note: Caller (or hardware) is responsible for setting the 4307 * &IEEE80211_FCTL_PM bit. 4308 * 4309 * Return: The PS Poll template. %NULL on error. 4310 */ 4311 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 4312 struct ieee80211_vif *vif); 4313 4314 /** 4315 * ieee80211_nullfunc_get - retrieve a nullfunc template 4316 * @hw: pointer obtained from ieee80211_alloc_hw(). 4317 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4318 * 4319 * Creates a Nullfunc template which can, for example, uploaded to 4320 * hardware. The template must be updated after association so that correct 4321 * BSSID and address is used. 4322 * 4323 * Note: Caller (or hardware) is responsible for setting the 4324 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 4325 * 4326 * Return: The nullfunc template. %NULL on error. 4327 */ 4328 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 4329 struct ieee80211_vif *vif); 4330 4331 /** 4332 * ieee80211_probereq_get - retrieve a Probe Request template 4333 * @hw: pointer obtained from ieee80211_alloc_hw(). 4334 * @src_addr: source MAC address 4335 * @ssid: SSID buffer 4336 * @ssid_len: length of SSID 4337 * @tailroom: tailroom to reserve at end of SKB for IEs 4338 * 4339 * Creates a Probe Request template which can, for example, be uploaded to 4340 * hardware. 4341 * 4342 * Return: The Probe Request template. %NULL on error. 4343 */ 4344 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 4345 const u8 *src_addr, 4346 const u8 *ssid, size_t ssid_len, 4347 size_t tailroom); 4348 4349 /** 4350 * ieee80211_rts_get - RTS frame generation function 4351 * @hw: pointer obtained from ieee80211_alloc_hw(). 4352 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4353 * @frame: pointer to the frame that is going to be protected by the RTS. 4354 * @frame_len: the frame length (in octets). 4355 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4356 * @rts: The buffer where to store the RTS frame. 4357 * 4358 * If the RTS frames are generated by the host system (i.e., not in 4359 * hardware/firmware), the low-level driver uses this function to receive 4360 * the next RTS frame from the 802.11 code. The low-level is responsible 4361 * for calling this function before and RTS frame is needed. 4362 */ 4363 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 4364 const void *frame, size_t frame_len, 4365 const struct ieee80211_tx_info *frame_txctl, 4366 struct ieee80211_rts *rts); 4367 4368 /** 4369 * ieee80211_rts_duration - Get the duration field for an RTS frame 4370 * @hw: pointer obtained from ieee80211_alloc_hw(). 4371 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4372 * @frame_len: the length of the frame that is going to be protected by the RTS. 4373 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4374 * 4375 * If the RTS is generated in firmware, but the host system must provide 4376 * the duration field, the low-level driver uses this function to receive 4377 * the duration field value in little-endian byteorder. 4378 * 4379 * Return: The duration. 4380 */ 4381 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 4382 struct ieee80211_vif *vif, size_t frame_len, 4383 const struct ieee80211_tx_info *frame_txctl); 4384 4385 /** 4386 * ieee80211_ctstoself_get - CTS-to-self frame generation function 4387 * @hw: pointer obtained from ieee80211_alloc_hw(). 4388 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4389 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 4390 * @frame_len: the frame length (in octets). 4391 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4392 * @cts: The buffer where to store the CTS-to-self frame. 4393 * 4394 * If the CTS-to-self frames are generated by the host system (i.e., not in 4395 * hardware/firmware), the low-level driver uses this function to receive 4396 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 4397 * for calling this function before and CTS-to-self frame is needed. 4398 */ 4399 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 4400 struct ieee80211_vif *vif, 4401 const void *frame, size_t frame_len, 4402 const struct ieee80211_tx_info *frame_txctl, 4403 struct ieee80211_cts *cts); 4404 4405 /** 4406 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 4407 * @hw: pointer obtained from ieee80211_alloc_hw(). 4408 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4409 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 4410 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4411 * 4412 * If the CTS-to-self is generated in firmware, but the host system must provide 4413 * the duration field, the low-level driver uses this function to receive 4414 * the duration field value in little-endian byteorder. 4415 * 4416 * Return: The duration. 4417 */ 4418 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 4419 struct ieee80211_vif *vif, 4420 size_t frame_len, 4421 const struct ieee80211_tx_info *frame_txctl); 4422 4423 /** 4424 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 4425 * @hw: pointer obtained from ieee80211_alloc_hw(). 4426 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4427 * @band: the band to calculate the frame duration on 4428 * @frame_len: the length of the frame. 4429 * @rate: the rate at which the frame is going to be transmitted. 4430 * 4431 * Calculate the duration field of some generic frame, given its 4432 * length and transmission rate (in 100kbps). 4433 * 4434 * Return: The duration. 4435 */ 4436 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 4437 struct ieee80211_vif *vif, 4438 enum nl80211_band band, 4439 size_t frame_len, 4440 struct ieee80211_rate *rate); 4441 4442 /** 4443 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 4444 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4445 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4446 * 4447 * Function for accessing buffered broadcast and multicast frames. If 4448 * hardware/firmware does not implement buffering of broadcast/multicast 4449 * frames when power saving is used, 802.11 code buffers them in the host 4450 * memory. The low-level driver uses this function to fetch next buffered 4451 * frame. In most cases, this is used when generating beacon frame. 4452 * 4453 * Return: A pointer to the next buffered skb or NULL if no more buffered 4454 * frames are available. 4455 * 4456 * Note: buffered frames are returned only after DTIM beacon frame was 4457 * generated with ieee80211_beacon_get() and the low-level driver must thus 4458 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 4459 * NULL if the previous generated beacon was not DTIM, so the low-level driver 4460 * does not need to check for DTIM beacons separately and should be able to 4461 * use common code for all beacons. 4462 */ 4463 struct sk_buff * 4464 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 4465 4466 /** 4467 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 4468 * 4469 * This function returns the TKIP phase 1 key for the given IV32. 4470 * 4471 * @keyconf: the parameter passed with the set key 4472 * @iv32: IV32 to get the P1K for 4473 * @p1k: a buffer to which the key will be written, as 5 u16 values 4474 */ 4475 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 4476 u32 iv32, u16 *p1k); 4477 4478 /** 4479 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 4480 * 4481 * This function returns the TKIP phase 1 key for the IV32 taken 4482 * from the given packet. 4483 * 4484 * @keyconf: the parameter passed with the set key 4485 * @skb: the packet to take the IV32 value from that will be encrypted 4486 * with this P1K 4487 * @p1k: a buffer to which the key will be written, as 5 u16 values 4488 */ 4489 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 4490 struct sk_buff *skb, u16 *p1k) 4491 { 4492 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 4493 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 4494 u32 iv32 = get_unaligned_le32(&data[4]); 4495 4496 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 4497 } 4498 4499 /** 4500 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 4501 * 4502 * This function returns the TKIP phase 1 key for the given IV32 4503 * and transmitter address. 4504 * 4505 * @keyconf: the parameter passed with the set key 4506 * @ta: TA that will be used with the key 4507 * @iv32: IV32 to get the P1K for 4508 * @p1k: a buffer to which the key will be written, as 5 u16 values 4509 */ 4510 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 4511 const u8 *ta, u32 iv32, u16 *p1k); 4512 4513 /** 4514 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 4515 * 4516 * This function computes the TKIP RC4 key for the IV values 4517 * in the packet. 4518 * 4519 * @keyconf: the parameter passed with the set key 4520 * @skb: the packet to take the IV32/IV16 values from that will be 4521 * encrypted with this key 4522 * @p2k: a buffer to which the key will be written, 16 bytes 4523 */ 4524 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 4525 struct sk_buff *skb, u8 *p2k); 4526 4527 /** 4528 * ieee80211_tkip_add_iv - write TKIP IV and Ext. IV to pos 4529 * 4530 * @pos: start of crypto header 4531 * @keyconf: the parameter passed with the set key 4532 * @pn: PN to add 4533 * 4534 * Returns: pointer to the octet following IVs (i.e. beginning of 4535 * the packet payload) 4536 * 4537 * This function writes the tkip IV value to pos (which should 4538 * point to the crypto header) 4539 */ 4540 u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key_conf *keyconf, u64 pn); 4541 4542 /** 4543 * ieee80211_get_key_rx_seq - get key RX sequence counter 4544 * 4545 * @keyconf: the parameter passed with the set key 4546 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4547 * the value on TID 0 is also used for non-QoS frames. For 4548 * CMAC, only TID 0 is valid. 4549 * @seq: buffer to receive the sequence data 4550 * 4551 * This function allows a driver to retrieve the current RX IV/PNs 4552 * for the given key. It must not be called if IV checking is done 4553 * by the device and not by mac80211. 4554 * 4555 * Note that this function may only be called when no RX processing 4556 * can be done concurrently. 4557 */ 4558 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 4559 int tid, struct ieee80211_key_seq *seq); 4560 4561 /** 4562 * ieee80211_set_key_rx_seq - set key RX sequence counter 4563 * 4564 * @keyconf: the parameter passed with the set key 4565 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4566 * the value on TID 0 is also used for non-QoS frames. For 4567 * CMAC, only TID 0 is valid. 4568 * @seq: new sequence data 4569 * 4570 * This function allows a driver to set the current RX IV/PNs for the 4571 * given key. This is useful when resuming from WoWLAN sleep and GTK 4572 * rekey may have been done while suspended. It should not be called 4573 * if IV checking is done by the device and not by mac80211. 4574 * 4575 * Note that this function may only be called when no RX processing 4576 * can be done concurrently. 4577 */ 4578 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 4579 int tid, struct ieee80211_key_seq *seq); 4580 4581 /** 4582 * ieee80211_remove_key - remove the given key 4583 * @keyconf: the parameter passed with the set key 4584 * 4585 * Remove the given key. If the key was uploaded to the hardware at the 4586 * time this function is called, it is not deleted in the hardware but 4587 * instead assumed to have been removed already. 4588 * 4589 * Note that due to locking considerations this function can (currently) 4590 * only be called during key iteration (ieee80211_iter_keys().) 4591 */ 4592 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 4593 4594 /** 4595 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 4596 * @vif: the virtual interface to add the key on 4597 * @keyconf: new key data 4598 * 4599 * When GTK rekeying was done while the system was suspended, (a) new 4600 * key(s) will be available. These will be needed by mac80211 for proper 4601 * RX processing, so this function allows setting them. 4602 * 4603 * The function returns the newly allocated key structure, which will 4604 * have similar contents to the passed key configuration but point to 4605 * mac80211-owned memory. In case of errors, the function returns an 4606 * ERR_PTR(), use IS_ERR() etc. 4607 * 4608 * Note that this function assumes the key isn't added to hardware 4609 * acceleration, so no TX will be done with the key. Since it's a GTK 4610 * on managed (station) networks, this is true anyway. If the driver 4611 * calls this function from the resume callback and subsequently uses 4612 * the return code 1 to reconfigure the device, this key will be part 4613 * of the reconfiguration. 4614 * 4615 * Note that the driver should also call ieee80211_set_key_rx_seq() 4616 * for the new key for each TID to set up sequence counters properly. 4617 * 4618 * IMPORTANT: If this replaces a key that is present in the hardware, 4619 * then it will attempt to remove it during this call. In many cases 4620 * this isn't what you want, so call ieee80211_remove_key() first for 4621 * the key that's being replaced. 4622 */ 4623 struct ieee80211_key_conf * 4624 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 4625 struct ieee80211_key_conf *keyconf); 4626 4627 /** 4628 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 4629 * @vif: virtual interface the rekeying was done on 4630 * @bssid: The BSSID of the AP, for checking association 4631 * @replay_ctr: the new replay counter after GTK rekeying 4632 * @gfp: allocation flags 4633 */ 4634 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 4635 const u8 *replay_ctr, gfp_t gfp); 4636 4637 /** 4638 * ieee80211_wake_queue - wake specific queue 4639 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4640 * @queue: queue number (counted from zero). 4641 * 4642 * Drivers should use this function instead of netif_wake_queue. 4643 */ 4644 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 4645 4646 /** 4647 * ieee80211_stop_queue - stop specific queue 4648 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4649 * @queue: queue number (counted from zero). 4650 * 4651 * Drivers should use this function instead of netif_stop_queue. 4652 */ 4653 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 4654 4655 /** 4656 * ieee80211_queue_stopped - test status of the queue 4657 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4658 * @queue: queue number (counted from zero). 4659 * 4660 * Drivers should use this function instead of netif_stop_queue. 4661 * 4662 * Return: %true if the queue is stopped. %false otherwise. 4663 */ 4664 4665 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 4666 4667 /** 4668 * ieee80211_stop_queues - stop all queues 4669 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4670 * 4671 * Drivers should use this function instead of netif_stop_queue. 4672 */ 4673 void ieee80211_stop_queues(struct ieee80211_hw *hw); 4674 4675 /** 4676 * ieee80211_wake_queues - wake all queues 4677 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4678 * 4679 * Drivers should use this function instead of netif_wake_queue. 4680 */ 4681 void ieee80211_wake_queues(struct ieee80211_hw *hw); 4682 4683 /** 4684 * ieee80211_scan_completed - completed hardware scan 4685 * 4686 * When hardware scan offload is used (i.e. the hw_scan() callback is 4687 * assigned) this function needs to be called by the driver to notify 4688 * mac80211 that the scan finished. This function can be called from 4689 * any context, including hardirq context. 4690 * 4691 * @hw: the hardware that finished the scan 4692 * @aborted: set to true if scan was aborted 4693 */ 4694 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 4695 4696 /** 4697 * ieee80211_sched_scan_results - got results from scheduled scan 4698 * 4699 * When a scheduled scan is running, this function needs to be called by the 4700 * driver whenever there are new scan results available. 4701 * 4702 * @hw: the hardware that is performing scheduled scans 4703 */ 4704 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 4705 4706 /** 4707 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 4708 * 4709 * When a scheduled scan is running, this function can be called by 4710 * the driver if it needs to stop the scan to perform another task. 4711 * Usual scenarios are drivers that cannot continue the scheduled scan 4712 * while associating, for instance. 4713 * 4714 * @hw: the hardware that is performing scheduled scans 4715 */ 4716 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 4717 4718 /** 4719 * enum ieee80211_interface_iteration_flags - interface iteration flags 4720 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 4721 * been added to the driver; However, note that during hardware 4722 * reconfiguration (after restart_hw) it will iterate over a new 4723 * interface and over all the existing interfaces even if they 4724 * haven't been re-added to the driver yet. 4725 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 4726 * interfaces, even if they haven't been re-added to the driver yet. 4727 * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up). 4728 */ 4729 enum ieee80211_interface_iteration_flags { 4730 IEEE80211_IFACE_ITER_NORMAL = 0, 4731 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 4732 IEEE80211_IFACE_ITER_ACTIVE = BIT(1), 4733 }; 4734 4735 /** 4736 * ieee80211_iterate_interfaces - iterate interfaces 4737 * 4738 * This function iterates over the interfaces associated with a given 4739 * hardware and calls the callback for them. This includes active as well as 4740 * inactive interfaces. This function allows the iterator function to sleep. 4741 * Will iterate over a new interface during add_interface(). 4742 * 4743 * @hw: the hardware struct of which the interfaces should be iterated over 4744 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4745 * @iterator: the iterator function to call 4746 * @data: first argument of the iterator function 4747 */ 4748 void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4749 void (*iterator)(void *data, u8 *mac, 4750 struct ieee80211_vif *vif), 4751 void *data); 4752 4753 /** 4754 * ieee80211_iterate_active_interfaces - iterate active interfaces 4755 * 4756 * This function iterates over the interfaces associated with a given 4757 * hardware that are currently active and calls the callback for them. 4758 * This function allows the iterator function to sleep, when the iterator 4759 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 4760 * be used. 4761 * Does not iterate over a new interface during add_interface(). 4762 * 4763 * @hw: the hardware struct of which the interfaces should be iterated over 4764 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4765 * @iterator: the iterator function to call 4766 * @data: first argument of the iterator function 4767 */ 4768 static inline void 4769 ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4770 void (*iterator)(void *data, u8 *mac, 4771 struct ieee80211_vif *vif), 4772 void *data) 4773 { 4774 ieee80211_iterate_interfaces(hw, 4775 iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 4776 iterator, data); 4777 } 4778 4779 /** 4780 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 4781 * 4782 * This function iterates over the interfaces associated with a given 4783 * hardware that are currently active and calls the callback for them. 4784 * This function requires the iterator callback function to be atomic, 4785 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4786 * Does not iterate over a new interface during add_interface(). 4787 * 4788 * @hw: the hardware struct of which the interfaces should be iterated over 4789 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4790 * @iterator: the iterator function to call, cannot sleep 4791 * @data: first argument of the iterator function 4792 */ 4793 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4794 u32 iter_flags, 4795 void (*iterator)(void *data, 4796 u8 *mac, 4797 struct ieee80211_vif *vif), 4798 void *data); 4799 4800 /** 4801 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4802 * 4803 * This function iterates over the interfaces associated with a given 4804 * hardware that are currently active and calls the callback for them. 4805 * This version can only be used while holding the RTNL. 4806 * 4807 * @hw: the hardware struct of which the interfaces should be iterated over 4808 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4809 * @iterator: the iterator function to call, cannot sleep 4810 * @data: first argument of the iterator function 4811 */ 4812 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4813 u32 iter_flags, 4814 void (*iterator)(void *data, 4815 u8 *mac, 4816 struct ieee80211_vif *vif), 4817 void *data); 4818 4819 /** 4820 * ieee80211_iterate_stations_atomic - iterate stations 4821 * 4822 * This function iterates over all stations associated with a given 4823 * hardware that are currently uploaded to the driver and calls the callback 4824 * function for them. 4825 * This function requires the iterator callback function to be atomic, 4826 * 4827 * @hw: the hardware struct of which the interfaces should be iterated over 4828 * @iterator: the iterator function to call, cannot sleep 4829 * @data: first argument of the iterator function 4830 */ 4831 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 4832 void (*iterator)(void *data, 4833 struct ieee80211_sta *sta), 4834 void *data); 4835 /** 4836 * ieee80211_queue_work - add work onto the mac80211 workqueue 4837 * 4838 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4839 * This helper ensures drivers are not queueing work when they should not be. 4840 * 4841 * @hw: the hardware struct for the interface we are adding work for 4842 * @work: the work we want to add onto the mac80211 workqueue 4843 */ 4844 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4845 4846 /** 4847 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4848 * 4849 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4850 * workqueue. 4851 * 4852 * @hw: the hardware struct for the interface we are adding work for 4853 * @dwork: delayable work to queue onto the mac80211 workqueue 4854 * @delay: number of jiffies to wait before queueing 4855 */ 4856 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4857 struct delayed_work *dwork, 4858 unsigned long delay); 4859 4860 /** 4861 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4862 * @sta: the station for which to start a BA session 4863 * @tid: the TID to BA on. 4864 * @timeout: session timeout value (in TUs) 4865 * 4866 * Return: success if addBA request was sent, failure otherwise 4867 * 4868 * Although mac80211/low level driver/user space application can estimate 4869 * the need to start aggregation on a certain RA/TID, the session level 4870 * will be managed by the mac80211. 4871 */ 4872 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4873 u16 timeout); 4874 4875 /** 4876 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4877 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4878 * @ra: receiver address of the BA session recipient. 4879 * @tid: the TID to BA on. 4880 * 4881 * This function must be called by low level driver once it has 4882 * finished with preparations for the BA session. It can be called 4883 * from any context. 4884 */ 4885 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4886 u16 tid); 4887 4888 /** 4889 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4890 * @sta: the station whose BA session to stop 4891 * @tid: the TID to stop BA. 4892 * 4893 * Return: negative error if the TID is invalid, or no aggregation active 4894 * 4895 * Although mac80211/low level driver/user space application can estimate 4896 * the need to stop aggregation on a certain RA/TID, the session level 4897 * will be managed by the mac80211. 4898 */ 4899 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4900 4901 /** 4902 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4903 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4904 * @ra: receiver address of the BA session recipient. 4905 * @tid: the desired TID to BA on. 4906 * 4907 * This function must be called by low level driver once it has 4908 * finished with preparations for the BA session tear down. It 4909 * can be called from any context. 4910 */ 4911 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4912 u16 tid); 4913 4914 /** 4915 * ieee80211_find_sta - find a station 4916 * 4917 * @vif: virtual interface to look for station on 4918 * @addr: station's address 4919 * 4920 * Return: The station, if found. %NULL otherwise. 4921 * 4922 * Note: This function must be called under RCU lock and the 4923 * resulting pointer is only valid under RCU lock as well. 4924 */ 4925 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4926 const u8 *addr); 4927 4928 /** 4929 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4930 * 4931 * @hw: pointer as obtained from ieee80211_alloc_hw() 4932 * @addr: remote station's address 4933 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4934 * 4935 * Return: The station, if found. %NULL otherwise. 4936 * 4937 * Note: This function must be called under RCU lock and the 4938 * resulting pointer is only valid under RCU lock as well. 4939 * 4940 * NOTE: You may pass NULL for localaddr, but then you will just get 4941 * the first STA that matches the remote address 'addr'. 4942 * We can have multiple STA associated with multiple 4943 * logical stations (e.g. consider a station connecting to another 4944 * BSSID on the same AP hardware without disconnecting first). 4945 * In this case, the result of this method with localaddr NULL 4946 * is not reliable. 4947 * 4948 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4949 */ 4950 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4951 const u8 *addr, 4952 const u8 *localaddr); 4953 4954 /** 4955 * ieee80211_sta_block_awake - block station from waking up 4956 * @hw: the hardware 4957 * @pubsta: the station 4958 * @block: whether to block or unblock 4959 * 4960 * Some devices require that all frames that are on the queues 4961 * for a specific station that went to sleep are flushed before 4962 * a poll response or frames after the station woke up can be 4963 * delivered to that it. Note that such frames must be rejected 4964 * by the driver as filtered, with the appropriate status flag. 4965 * 4966 * This function allows implementing this mode in a race-free 4967 * manner. 4968 * 4969 * To do this, a driver must keep track of the number of frames 4970 * still enqueued for a specific station. If this number is not 4971 * zero when the station goes to sleep, the driver must call 4972 * this function to force mac80211 to consider the station to 4973 * be asleep regardless of the station's actual state. Once the 4974 * number of outstanding frames reaches zero, the driver must 4975 * call this function again to unblock the station. That will 4976 * cause mac80211 to be able to send ps-poll responses, and if 4977 * the station queried in the meantime then frames will also 4978 * be sent out as a result of this. Additionally, the driver 4979 * will be notified that the station woke up some time after 4980 * it is unblocked, regardless of whether the station actually 4981 * woke up while blocked or not. 4982 */ 4983 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4984 struct ieee80211_sta *pubsta, bool block); 4985 4986 /** 4987 * ieee80211_sta_eosp - notify mac80211 about end of SP 4988 * @pubsta: the station 4989 * 4990 * When a device transmits frames in a way that it can't tell 4991 * mac80211 in the TX status about the EOSP, it must clear the 4992 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 4993 * This applies for PS-Poll as well as uAPSD. 4994 * 4995 * Note that just like with _tx_status() and _rx() drivers must 4996 * not mix calls to irqsafe/non-irqsafe versions, this function 4997 * must not be mixed with those either. Use the all irqsafe, or 4998 * all non-irqsafe, don't mix! 4999 * 5000 * NB: the _irqsafe version of this function doesn't exist, no 5001 * driver needs it right now. Don't call this function if 5002 * you'd need the _irqsafe version, look at the git history 5003 * and restore the _irqsafe version! 5004 */ 5005 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 5006 5007 /** 5008 * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP 5009 * @pubsta: the station 5010 * @tid: the tid of the NDP 5011 * 5012 * Sometimes the device understands that it needs to close 5013 * the Service Period unexpectedly. This can happen when 5014 * sending frames that are filling holes in the BA window. 5015 * In this case, the device can ask mac80211 to send a 5016 * Nullfunc frame with EOSP set. When that happens, the 5017 * driver must have called ieee80211_sta_set_buffered() to 5018 * let mac80211 know that there are no buffered frames any 5019 * more, otherwise mac80211 will get the more_data bit wrong. 5020 * The low level driver must have made sure that the frame 5021 * will be sent despite the station being in power-save. 5022 * Mac80211 won't call allow_buffered_frames(). 5023 * Note that calling this function, doesn't exempt the driver 5024 * from closing the EOSP properly, it will still have to call 5025 * ieee80211_sta_eosp when the NDP is sent. 5026 */ 5027 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid); 5028 5029 /** 5030 * ieee80211_iter_keys - iterate keys programmed into the device 5031 * @hw: pointer obtained from ieee80211_alloc_hw() 5032 * @vif: virtual interface to iterate, may be %NULL for all 5033 * @iter: iterator function that will be called for each key 5034 * @iter_data: custom data to pass to the iterator function 5035 * 5036 * This function can be used to iterate all the keys known to 5037 * mac80211, even those that weren't previously programmed into 5038 * the device. This is intended for use in WoWLAN if the device 5039 * needs reprogramming of the keys during suspend. Note that due 5040 * to locking reasons, it is also only safe to call this at few 5041 * spots since it must hold the RTNL and be able to sleep. 5042 * 5043 * The order in which the keys are iterated matches the order 5044 * in which they were originally installed and handed to the 5045 * set_key callback. 5046 */ 5047 void ieee80211_iter_keys(struct ieee80211_hw *hw, 5048 struct ieee80211_vif *vif, 5049 void (*iter)(struct ieee80211_hw *hw, 5050 struct ieee80211_vif *vif, 5051 struct ieee80211_sta *sta, 5052 struct ieee80211_key_conf *key, 5053 void *data), 5054 void *iter_data); 5055 5056 /** 5057 * ieee80211_iter_keys_rcu - iterate keys programmed into the device 5058 * @hw: pointer obtained from ieee80211_alloc_hw() 5059 * @vif: virtual interface to iterate, may be %NULL for all 5060 * @iter: iterator function that will be called for each key 5061 * @iter_data: custom data to pass to the iterator function 5062 * 5063 * This function can be used to iterate all the keys known to 5064 * mac80211, even those that weren't previously programmed into 5065 * the device. Note that due to locking reasons, keys of station 5066 * in removal process will be skipped. 5067 * 5068 * This function requires being called in an RCU critical section, 5069 * and thus iter must be atomic. 5070 */ 5071 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, 5072 struct ieee80211_vif *vif, 5073 void (*iter)(struct ieee80211_hw *hw, 5074 struct ieee80211_vif *vif, 5075 struct ieee80211_sta *sta, 5076 struct ieee80211_key_conf *key, 5077 void *data), 5078 void *iter_data); 5079 5080 /** 5081 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 5082 * @hw: pointre obtained from ieee80211_alloc_hw(). 5083 * @iter: iterator function 5084 * @iter_data: data passed to iterator function 5085 * 5086 * Iterate all active channel contexts. This function is atomic and 5087 * doesn't acquire any locks internally that might be held in other 5088 * places while calling into the driver. 5089 * 5090 * The iterator will not find a context that's being added (during 5091 * the driver callback to add it) but will find it while it's being 5092 * removed. 5093 * 5094 * Note that during hardware restart, all contexts that existed 5095 * before the restart are considered already present so will be 5096 * found while iterating, whether they've been re-added already 5097 * or not. 5098 */ 5099 void ieee80211_iter_chan_contexts_atomic( 5100 struct ieee80211_hw *hw, 5101 void (*iter)(struct ieee80211_hw *hw, 5102 struct ieee80211_chanctx_conf *chanctx_conf, 5103 void *data), 5104 void *iter_data); 5105 5106 /** 5107 * ieee80211_ap_probereq_get - retrieve a Probe Request template 5108 * @hw: pointer obtained from ieee80211_alloc_hw(). 5109 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5110 * 5111 * Creates a Probe Request template which can, for example, be uploaded to 5112 * hardware. The template is filled with bssid, ssid and supported rate 5113 * information. This function must only be called from within the 5114 * .bss_info_changed callback function and only in managed mode. The function 5115 * is only useful when the interface is associated, otherwise it will return 5116 * %NULL. 5117 * 5118 * Return: The Probe Request template. %NULL on error. 5119 */ 5120 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 5121 struct ieee80211_vif *vif); 5122 5123 /** 5124 * ieee80211_beacon_loss - inform hardware does not receive beacons 5125 * 5126 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5127 * 5128 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 5129 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 5130 * hardware is not receiving beacons with this function. 5131 */ 5132 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 5133 5134 /** 5135 * ieee80211_connection_loss - inform hardware has lost connection to the AP 5136 * 5137 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5138 * 5139 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 5140 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 5141 * needs to inform if the connection to the AP has been lost. 5142 * The function may also be called if the connection needs to be terminated 5143 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 5144 * 5145 * This function will cause immediate change to disassociated state, 5146 * without connection recovery attempts. 5147 */ 5148 void ieee80211_connection_loss(struct ieee80211_vif *vif); 5149 5150 /** 5151 * ieee80211_resume_disconnect - disconnect from AP after resume 5152 * 5153 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5154 * 5155 * Instructs mac80211 to disconnect from the AP after resume. 5156 * Drivers can use this after WoWLAN if they know that the 5157 * connection cannot be kept up, for example because keys were 5158 * used while the device was asleep but the replay counters or 5159 * similar cannot be retrieved from the device during resume. 5160 * 5161 * Note that due to implementation issues, if the driver uses 5162 * the reconfiguration functionality during resume the interface 5163 * will still be added as associated first during resume and then 5164 * disconnect normally later. 5165 * 5166 * This function can only be called from the resume callback and 5167 * the driver must not be holding any of its own locks while it 5168 * calls this function, or at least not any locks it needs in the 5169 * key configuration paths (if it supports HW crypto). 5170 */ 5171 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 5172 5173 /** 5174 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 5175 * rssi threshold triggered 5176 * 5177 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5178 * @rssi_event: the RSSI trigger event type 5179 * @gfp: context flags 5180 * 5181 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 5182 * monitoring is configured with an rssi threshold, the driver will inform 5183 * whenever the rssi level reaches the threshold. 5184 */ 5185 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5186 enum nl80211_cqm_rssi_threshold_event rssi_event, 5187 gfp_t gfp); 5188 5189 /** 5190 * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss 5191 * 5192 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5193 * @gfp: context flags 5194 */ 5195 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp); 5196 5197 /** 5198 * ieee80211_radar_detected - inform that a radar was detected 5199 * 5200 * @hw: pointer as obtained from ieee80211_alloc_hw() 5201 */ 5202 void ieee80211_radar_detected(struct ieee80211_hw *hw); 5203 5204 /** 5205 * ieee80211_chswitch_done - Complete channel switch process 5206 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5207 * @success: make the channel switch successful or not 5208 * 5209 * Complete the channel switch post-process: set the new operational channel 5210 * and wake up the suspended queues. 5211 */ 5212 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 5213 5214 /** 5215 * ieee80211_request_smps - request SM PS transition 5216 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5217 * @smps_mode: new SM PS mode 5218 * 5219 * This allows the driver to request an SM PS transition in managed 5220 * mode. This is useful when the driver has more information than 5221 * the stack about possible interference, for example by bluetooth. 5222 */ 5223 void ieee80211_request_smps(struct ieee80211_vif *vif, 5224 enum ieee80211_smps_mode smps_mode); 5225 5226 /** 5227 * ieee80211_ready_on_channel - notification of remain-on-channel start 5228 * @hw: pointer as obtained from ieee80211_alloc_hw() 5229 */ 5230 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 5231 5232 /** 5233 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 5234 * @hw: pointer as obtained from ieee80211_alloc_hw() 5235 */ 5236 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 5237 5238 /** 5239 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 5240 * 5241 * in order not to harm the system performance and user experience, the device 5242 * may request not to allow any rx ba session and tear down existing rx ba 5243 * sessions based on system constraints such as periodic BT activity that needs 5244 * to limit wlan activity (eg.sco or a2dp)." 5245 * in such cases, the intention is to limit the duration of the rx ppdu and 5246 * therefore prevent the peer device to use a-mpdu aggregation. 5247 * 5248 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5249 * @ba_rx_bitmap: Bit map of open rx ba per tid 5250 * @addr: & to bssid mac address 5251 */ 5252 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 5253 const u8 *addr); 5254 5255 /** 5256 * ieee80211_mark_rx_ba_filtered_frames - move RX BA window and mark filtered 5257 * @pubsta: station struct 5258 * @tid: the session's TID 5259 * @ssn: starting sequence number of the bitmap, all frames before this are 5260 * assumed to be out of the window after the call 5261 * @filtered: bitmap of filtered frames, BIT(0) is the @ssn entry etc. 5262 * @received_mpdus: number of received mpdus in firmware 5263 * 5264 * This function moves the BA window and releases all frames before @ssn, and 5265 * marks frames marked in the bitmap as having been filtered. Afterwards, it 5266 * checks if any frames in the window starting from @ssn can now be released 5267 * (in case they were only waiting for frames that were filtered.) 5268 */ 5269 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid, 5270 u16 ssn, u64 filtered, 5271 u16 received_mpdus); 5272 5273 /** 5274 * ieee80211_send_bar - send a BlockAckReq frame 5275 * 5276 * can be used to flush pending frames from the peer's aggregation reorder 5277 * buffer. 5278 * 5279 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5280 * @ra: the peer's destination address 5281 * @tid: the TID of the aggregation session 5282 * @ssn: the new starting sequence number for the receiver 5283 */ 5284 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 5285 5286 /** 5287 * ieee80211_start_rx_ba_session_offl - start a Rx BA session 5288 * 5289 * Some device drivers may offload part of the Rx aggregation flow including 5290 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5291 * reordering. 5292 * 5293 * Create structures responsible for reordering so device drivers may call here 5294 * when they complete AddBa negotiation. 5295 * 5296 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5297 * @addr: station mac address 5298 * @tid: the rx tid 5299 */ 5300 void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, 5301 const u8 *addr, u16 tid); 5302 5303 /** 5304 * ieee80211_stop_rx_ba_session_offl - stop a Rx BA session 5305 * 5306 * Some device drivers may offload part of the Rx aggregation flow including 5307 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5308 * reordering. 5309 * 5310 * Destroy structures responsible for reordering so device drivers may call here 5311 * when they complete DelBa negotiation. 5312 * 5313 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5314 * @addr: station mac address 5315 * @tid: the rx tid 5316 */ 5317 void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, 5318 const u8 *addr, u16 tid); 5319 5320 /* Rate control API */ 5321 5322 /** 5323 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 5324 * 5325 * @hw: The hardware the algorithm is invoked for. 5326 * @sband: The band this frame is being transmitted on. 5327 * @bss_conf: the current BSS configuration 5328 * @skb: the skb that will be transmitted, the control information in it needs 5329 * to be filled in 5330 * @reported_rate: The rate control algorithm can fill this in to indicate 5331 * which rate should be reported to userspace as the current rate and 5332 * used for rate calculations in the mesh network. 5333 * @rts: whether RTS will be used for this frame because it is longer than the 5334 * RTS threshold 5335 * @short_preamble: whether mac80211 will request short-preamble transmission 5336 * if the selected rate supports it 5337 * @max_rate_idx: user-requested maximum (legacy) rate 5338 * (deprecated; this will be removed once drivers get updated to use 5339 * rate_idx_mask) 5340 * @rate_idx_mask: user-requested (legacy) rate mask 5341 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 5342 * @bss: whether this frame is sent out in AP or IBSS mode 5343 */ 5344 struct ieee80211_tx_rate_control { 5345 struct ieee80211_hw *hw; 5346 struct ieee80211_supported_band *sband; 5347 struct ieee80211_bss_conf *bss_conf; 5348 struct sk_buff *skb; 5349 struct ieee80211_tx_rate reported_rate; 5350 bool rts, short_preamble; 5351 u8 max_rate_idx; 5352 u32 rate_idx_mask; 5353 u8 *rate_idx_mcs_mask; 5354 bool bss; 5355 }; 5356 5357 struct rate_control_ops { 5358 const char *name; 5359 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 5360 void (*free)(void *priv); 5361 5362 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 5363 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 5364 struct cfg80211_chan_def *chandef, 5365 struct ieee80211_sta *sta, void *priv_sta); 5366 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 5367 struct cfg80211_chan_def *chandef, 5368 struct ieee80211_sta *sta, void *priv_sta, 5369 u32 changed); 5370 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 5371 void *priv_sta); 5372 5373 void (*tx_status_noskb)(void *priv, 5374 struct ieee80211_supported_band *sband, 5375 struct ieee80211_sta *sta, void *priv_sta, 5376 struct ieee80211_tx_info *info); 5377 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 5378 struct ieee80211_sta *sta, void *priv_sta, 5379 struct sk_buff *skb); 5380 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 5381 struct ieee80211_tx_rate_control *txrc); 5382 5383 void (*add_sta_debugfs)(void *priv, void *priv_sta, 5384 struct dentry *dir); 5385 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 5386 5387 u32 (*get_expected_throughput)(void *priv_sta); 5388 }; 5389 5390 static inline int rate_supported(struct ieee80211_sta *sta, 5391 enum nl80211_band band, 5392 int index) 5393 { 5394 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 5395 } 5396 5397 /** 5398 * rate_control_send_low - helper for drivers for management/no-ack frames 5399 * 5400 * Rate control algorithms that agree to use the lowest rate to 5401 * send management frames and NO_ACK data with the respective hw 5402 * retries should use this in the beginning of their mac80211 get_rate 5403 * callback. If true is returned the rate control can simply return. 5404 * If false is returned we guarantee that sta and sta and priv_sta is 5405 * not null. 5406 * 5407 * Rate control algorithms wishing to do more intelligent selection of 5408 * rate for multicast/broadcast frames may choose to not use this. 5409 * 5410 * @sta: &struct ieee80211_sta pointer to the target destination. Note 5411 * that this may be null. 5412 * @priv_sta: private rate control structure. This may be null. 5413 * @txrc: rate control information we sholud populate for mac80211. 5414 */ 5415 bool rate_control_send_low(struct ieee80211_sta *sta, 5416 void *priv_sta, 5417 struct ieee80211_tx_rate_control *txrc); 5418 5419 5420 static inline s8 5421 rate_lowest_index(struct ieee80211_supported_band *sband, 5422 struct ieee80211_sta *sta) 5423 { 5424 int i; 5425 5426 for (i = 0; i < sband->n_bitrates; i++) 5427 if (rate_supported(sta, sband->band, i)) 5428 return i; 5429 5430 /* warn when we cannot find a rate. */ 5431 WARN_ON_ONCE(1); 5432 5433 /* and return 0 (the lowest index) */ 5434 return 0; 5435 } 5436 5437 static inline 5438 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 5439 struct ieee80211_sta *sta) 5440 { 5441 unsigned int i; 5442 5443 for (i = 0; i < sband->n_bitrates; i++) 5444 if (rate_supported(sta, sband->band, i)) 5445 return true; 5446 return false; 5447 } 5448 5449 /** 5450 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 5451 * 5452 * When not doing a rate control probe to test rates, rate control should pass 5453 * its rate selection to mac80211. If the driver supports receiving a station 5454 * rate table, it will use it to ensure that frames are always sent based on 5455 * the most recent rate control module decision. 5456 * 5457 * @hw: pointer as obtained from ieee80211_alloc_hw() 5458 * @pubsta: &struct ieee80211_sta pointer to the target destination. 5459 * @rates: new tx rate set to be used for this station. 5460 */ 5461 int rate_control_set_rates(struct ieee80211_hw *hw, 5462 struct ieee80211_sta *pubsta, 5463 struct ieee80211_sta_rates *rates); 5464 5465 int ieee80211_rate_control_register(const struct rate_control_ops *ops); 5466 void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 5467 5468 static inline bool 5469 conf_is_ht20(struct ieee80211_conf *conf) 5470 { 5471 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 5472 } 5473 5474 static inline bool 5475 conf_is_ht40_minus(struct ieee80211_conf *conf) 5476 { 5477 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5478 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 5479 } 5480 5481 static inline bool 5482 conf_is_ht40_plus(struct ieee80211_conf *conf) 5483 { 5484 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5485 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 5486 } 5487 5488 static inline bool 5489 conf_is_ht40(struct ieee80211_conf *conf) 5490 { 5491 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 5492 } 5493 5494 static inline bool 5495 conf_is_ht(struct ieee80211_conf *conf) 5496 { 5497 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) && 5498 (conf->chandef.width != NL80211_CHAN_WIDTH_10) && 5499 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT); 5500 } 5501 5502 static inline enum nl80211_iftype 5503 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 5504 { 5505 if (p2p) { 5506 switch (type) { 5507 case NL80211_IFTYPE_STATION: 5508 return NL80211_IFTYPE_P2P_CLIENT; 5509 case NL80211_IFTYPE_AP: 5510 return NL80211_IFTYPE_P2P_GO; 5511 default: 5512 break; 5513 } 5514 } 5515 return type; 5516 } 5517 5518 static inline enum nl80211_iftype 5519 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 5520 { 5521 return ieee80211_iftype_p2p(vif->type, vif->p2p); 5522 } 5523 5524 /** 5525 * ieee80211_update_mu_groups - set the VHT MU-MIMO groud data 5526 * 5527 * @vif: the specified virtual interface 5528 * @membership: 64 bits array - a bit is set if station is member of the group 5529 * @position: 2 bits per group id indicating the position in the group 5530 * 5531 * Note: This function assumes that the given vif is valid and the position and 5532 * membership data is of the correct size and are in the same byte order as the 5533 * matching GroupId management frame. 5534 * Calls to this function need to be serialized with RX path. 5535 */ 5536 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 5537 const u8 *membership, const u8 *position); 5538 5539 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 5540 int rssi_min_thold, 5541 int rssi_max_thold); 5542 5543 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 5544 5545 /** 5546 * ieee80211_ave_rssi - report the average RSSI for the specified interface 5547 * 5548 * @vif: the specified virtual interface 5549 * 5550 * Note: This function assumes that the given vif is valid. 5551 * 5552 * Return: The average RSSI value for the requested interface, or 0 if not 5553 * applicable. 5554 */ 5555 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 5556 5557 /** 5558 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 5559 * @vif: virtual interface 5560 * @wakeup: wakeup reason(s) 5561 * @gfp: allocation flags 5562 * 5563 * See cfg80211_report_wowlan_wakeup(). 5564 */ 5565 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 5566 struct cfg80211_wowlan_wakeup *wakeup, 5567 gfp_t gfp); 5568 5569 /** 5570 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 5571 * @hw: pointer as obtained from ieee80211_alloc_hw() 5572 * @vif: virtual interface 5573 * @skb: frame to be sent from within the driver 5574 * @band: the band to transmit on 5575 * @sta: optional pointer to get the station to send the frame to 5576 * 5577 * Note: must be called under RCU lock 5578 */ 5579 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 5580 struct ieee80211_vif *vif, struct sk_buff *skb, 5581 int band, struct ieee80211_sta **sta); 5582 5583 /** 5584 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 5585 * 5586 * @next_tsf: TSF timestamp of the next absent state change 5587 * @has_next_tsf: next absent state change event pending 5588 * 5589 * @absent: descriptor bitmask, set if GO is currently absent 5590 * 5591 * private: 5592 * 5593 * @count: count fields from the NoA descriptors 5594 * @desc: adjusted data from the NoA 5595 */ 5596 struct ieee80211_noa_data { 5597 u32 next_tsf; 5598 bool has_next_tsf; 5599 5600 u8 absent; 5601 5602 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 5603 struct { 5604 u32 start; 5605 u32 duration; 5606 u32 interval; 5607 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 5608 }; 5609 5610 /** 5611 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 5612 * 5613 * @attr: P2P NoA IE 5614 * @data: NoA tracking data 5615 * @tsf: current TSF timestamp 5616 * 5617 * Return: number of successfully parsed descriptors 5618 */ 5619 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 5620 struct ieee80211_noa_data *data, u32 tsf); 5621 5622 /** 5623 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 5624 * 5625 * @data: NoA tracking data 5626 * @tsf: current TSF timestamp 5627 */ 5628 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 5629 5630 /** 5631 * ieee80211_tdls_oper - request userspace to perform a TDLS operation 5632 * @vif: virtual interface 5633 * @peer: the peer's destination address 5634 * @oper: the requested TDLS operation 5635 * @reason_code: reason code for the operation, valid for TDLS teardown 5636 * @gfp: allocation flags 5637 * 5638 * See cfg80211_tdls_oper_request(). 5639 */ 5640 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, 5641 enum nl80211_tdls_operation oper, 5642 u16 reason_code, gfp_t gfp); 5643 5644 /** 5645 * ieee80211_reserve_tid - request to reserve a specific TID 5646 * 5647 * There is sometimes a need (such as in TDLS) for blocking the driver from 5648 * using a specific TID so that the FW can use it for certain operations such 5649 * as sending PTI requests. To make sure that the driver doesn't use that TID, 5650 * this function must be called as it flushes out packets on this TID and marks 5651 * it as blocked, so that any transmit for the station on this TID will be 5652 * redirected to the alternative TID in the same AC. 5653 * 5654 * Note that this function blocks and may call back into the driver, so it 5655 * should be called without driver locks held. Also note this function should 5656 * only be called from the driver's @sta_state callback. 5657 * 5658 * @sta: the station to reserve the TID for 5659 * @tid: the TID to reserve 5660 * 5661 * Returns: 0 on success, else on failure 5662 */ 5663 int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid); 5664 5665 /** 5666 * ieee80211_unreserve_tid - request to unreserve a specific TID 5667 * 5668 * Once there is no longer any need for reserving a certain TID, this function 5669 * should be called, and no longer will packets have their TID modified for 5670 * preventing use of this TID in the driver. 5671 * 5672 * Note that this function blocks and acquires a lock, so it should be called 5673 * without driver locks held. Also note this function should only be called 5674 * from the driver's @sta_state callback. 5675 * 5676 * @sta: the station 5677 * @tid: the TID to unreserve 5678 */ 5679 void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid); 5680 5681 /** 5682 * ieee80211_tx_dequeue - dequeue a packet from a software tx queue 5683 * 5684 * @hw: pointer as obtained from ieee80211_alloc_hw() 5685 * @txq: pointer obtained from station or virtual interface 5686 * 5687 * Returns the skb if successful, %NULL if no frame was available. 5688 */ 5689 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, 5690 struct ieee80211_txq *txq); 5691 5692 /** 5693 * ieee80211_txq_get_depth - get pending frame/byte count of given txq 5694 * 5695 * The values are not guaranteed to be coherent with regard to each other, i.e. 5696 * txq state can change half-way of this function and the caller may end up 5697 * with "new" frame_cnt and "old" byte_cnt or vice-versa. 5698 * 5699 * @txq: pointer obtained from station or virtual interface 5700 * @frame_cnt: pointer to store frame count 5701 * @byte_cnt: pointer to store byte count 5702 */ 5703 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 5704 unsigned long *frame_cnt, 5705 unsigned long *byte_cnt); 5706 #endif /* MAC80211_H */ 5707