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 <net/codel.h> 25 #include <asm/unaligned.h> 26 27 /** 28 * DOC: Introduction 29 * 30 * mac80211 is the Linux stack for 802.11 hardware that implements 31 * only partial functionality in hard- or firmware. This document 32 * defines the interface between mac80211 and low-level hardware 33 * drivers. 34 */ 35 36 /** 37 * DOC: Calling mac80211 from interrupts 38 * 39 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 40 * called in hardware interrupt context. The low-level driver must not call any 41 * other functions in hardware interrupt context. If there is a need for such 42 * call, the low-level driver should first ACK the interrupt and perform the 43 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 44 * tasklet function. 45 * 46 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 47 * use the non-IRQ-safe functions! 48 */ 49 50 /** 51 * DOC: Warning 52 * 53 * If you're reading this document and not the header file itself, it will 54 * be incomplete because not all documentation has been converted yet. 55 */ 56 57 /** 58 * DOC: Frame format 59 * 60 * As a general rule, when frames are passed between mac80211 and the driver, 61 * they start with the IEEE 802.11 header and include the same octets that are 62 * sent over the air except for the FCS which should be calculated by the 63 * hardware. 64 * 65 * There are, however, various exceptions to this rule for advanced features: 66 * 67 * The first exception is for hardware encryption and decryption offload 68 * where the IV/ICV may or may not be generated in hardware. 69 * 70 * Secondly, when the hardware handles fragmentation, the frame handed to 71 * the driver from mac80211 is the MSDU, not the MPDU. 72 */ 73 74 /** 75 * DOC: mac80211 workqueue 76 * 77 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 78 * The workqueue is a single threaded workqueue and can only be accessed by 79 * helpers for sanity checking. Drivers must ensure all work added onto the 80 * mac80211 workqueue should be cancelled on the driver stop() callback. 81 * 82 * mac80211 will flushed the workqueue upon interface removal and during 83 * suspend. 84 * 85 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 86 * 87 */ 88 89 /** 90 * DOC: mac80211 software tx queueing 91 * 92 * mac80211 provides an optional intermediate queueing implementation designed 93 * to allow the driver to keep hardware queues short and provide some fairness 94 * between different stations/interfaces. 95 * In this model, the driver pulls data frames from the mac80211 queue instead 96 * of letting mac80211 push them via drv_tx(). 97 * Other frames (e.g. control or management) are still pushed using drv_tx(). 98 * 99 * Drivers indicate that they use this model by implementing the .wake_tx_queue 100 * driver operation. 101 * 102 * Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with a 103 * single per-vif queue for multicast data frames. 104 * 105 * The driver is expected to initialize its private per-queue data for stations 106 * and interfaces in the .add_interface and .sta_add ops. 107 * 108 * The driver can't access the queue directly. To dequeue a frame, it calls 109 * ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a queue, it 110 * calls the .wake_tx_queue driver op. 111 * 112 * For AP powersave TIM handling, the driver only needs to indicate if it has 113 * buffered packets in the driver specific data structures by calling 114 * ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq 115 * struct, mac80211 sets the appropriate TIM PVB bits and calls 116 * .release_buffered_frames(). 117 * In that callback the driver is therefore expected to release its own 118 * buffered frames and afterwards also frames from the ieee80211_txq (obtained 119 * via the usual ieee80211_tx_dequeue). 120 */ 121 122 struct device; 123 124 /** 125 * enum ieee80211_max_queues - maximum number of queues 126 * 127 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 128 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set 129 */ 130 enum ieee80211_max_queues { 131 IEEE80211_MAX_QUEUES = 16, 132 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1, 133 }; 134 135 #define IEEE80211_INVAL_HW_QUEUE 0xff 136 137 /** 138 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 139 * @IEEE80211_AC_VO: voice 140 * @IEEE80211_AC_VI: video 141 * @IEEE80211_AC_BE: best effort 142 * @IEEE80211_AC_BK: background 143 */ 144 enum ieee80211_ac_numbers { 145 IEEE80211_AC_VO = 0, 146 IEEE80211_AC_VI = 1, 147 IEEE80211_AC_BE = 2, 148 IEEE80211_AC_BK = 3, 149 }; 150 #define IEEE80211_NUM_ACS 4 151 152 /** 153 * struct ieee80211_tx_queue_params - transmit queue configuration 154 * 155 * The information provided in this structure is required for QoS 156 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 157 * 158 * @aifs: arbitration interframe space [0..255] 159 * @cw_min: minimum contention window [a value of the form 160 * 2^n-1 in the range 1..32767] 161 * @cw_max: maximum contention window [like @cw_min] 162 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 163 * @acm: is mandatory admission control required for the access category 164 * @uapsd: is U-APSD mode enabled for the queue 165 */ 166 struct ieee80211_tx_queue_params { 167 u16 txop; 168 u16 cw_min; 169 u16 cw_max; 170 u8 aifs; 171 bool acm; 172 bool uapsd; 173 }; 174 175 struct ieee80211_low_level_stats { 176 unsigned int dot11ACKFailureCount; 177 unsigned int dot11RTSFailureCount; 178 unsigned int dot11FCSErrorCount; 179 unsigned int dot11RTSSuccessCount; 180 }; 181 182 /** 183 * enum ieee80211_chanctx_change - change flag for channel context 184 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 185 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 186 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 187 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel, 188 * this is used only with channel switching with CSA 189 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed 190 */ 191 enum ieee80211_chanctx_change { 192 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 193 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 194 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 195 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3), 196 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4), 197 }; 198 199 /** 200 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 201 * 202 * This is the driver-visible part. The ieee80211_chanctx 203 * that contains it is visible in mac80211 only. 204 * 205 * @def: the channel definition 206 * @min_def: the minimum channel definition currently required. 207 * @rx_chains_static: The number of RX chains that must always be 208 * active on the channel to receive MIMO transmissions 209 * @rx_chains_dynamic: The number of RX chains that must be enabled 210 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 211 * this will always be >= @rx_chains_static. 212 * @radar_enabled: whether radar detection is enabled on this channel. 213 * @drv_priv: data area for driver use, will always be aligned to 214 * sizeof(void *), size is determined in hw information. 215 */ 216 struct ieee80211_chanctx_conf { 217 struct cfg80211_chan_def def; 218 struct cfg80211_chan_def min_def; 219 220 u8 rx_chains_static, rx_chains_dynamic; 221 222 bool radar_enabled; 223 224 u8 drv_priv[0] __aligned(sizeof(void *)); 225 }; 226 227 /** 228 * enum ieee80211_chanctx_switch_mode - channel context switch mode 229 * @CHANCTX_SWMODE_REASSIGN_VIF: Both old and new contexts already 230 * exist (and will continue to exist), but the virtual interface 231 * needs to be switched from one to the other. 232 * @CHANCTX_SWMODE_SWAP_CONTEXTS: The old context exists but will stop 233 * to exist with this call, the new context doesn't exist but 234 * will be active after this call, the virtual interface switches 235 * from the old to the new (note that the driver may of course 236 * implement this as an on-the-fly chandef switch of the existing 237 * hardware context, but the mac80211 pointer for the old context 238 * will cease to exist and only the new one will later be used 239 * for changes/removal.) 240 */ 241 enum ieee80211_chanctx_switch_mode { 242 CHANCTX_SWMODE_REASSIGN_VIF, 243 CHANCTX_SWMODE_SWAP_CONTEXTS, 244 }; 245 246 /** 247 * struct ieee80211_vif_chanctx_switch - vif chanctx switch information 248 * 249 * This is structure is used to pass information about a vif that 250 * needs to switch from one chanctx to another. The 251 * &ieee80211_chanctx_switch_mode defines how the switch should be 252 * done. 253 * 254 * @vif: the vif that should be switched from old_ctx to new_ctx 255 * @old_ctx: the old context to which the vif was assigned 256 * @new_ctx: the new context to which the vif must be assigned 257 */ 258 struct ieee80211_vif_chanctx_switch { 259 struct ieee80211_vif *vif; 260 struct ieee80211_chanctx_conf *old_ctx; 261 struct ieee80211_chanctx_conf *new_ctx; 262 }; 263 264 /** 265 * enum ieee80211_bss_change - BSS change notification flags 266 * 267 * These flags are used with the bss_info_changed() callback 268 * to indicate which BSS parameter changed. 269 * 270 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 271 * also implies a change in the AID. 272 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 273 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 274 * @BSS_CHANGED_ERP_SLOT: slot timing changed 275 * @BSS_CHANGED_HT: 802.11n parameters changed 276 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 277 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 278 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 279 * reason (IBSS and managed mode) 280 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 281 * new beacon (beaconing modes) 282 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 283 * enabled/disabled (beaconing modes) 284 * @BSS_CHANGED_CQM: Connection quality monitor config changed 285 * @BSS_CHANGED_IBSS: IBSS join status changed 286 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 287 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 288 * that it is only ever disabled for station mode. 289 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 290 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode) 291 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 292 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 293 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 294 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 295 * changed 296 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available: 297 * currently dtim_period only is under consideration. 298 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 299 * note that this is only called when it changes after the channel 300 * context had been assigned. 301 * @BSS_CHANGED_OCB: OCB join status changed 302 * @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed 303 */ 304 enum ieee80211_bss_change { 305 BSS_CHANGED_ASSOC = 1<<0, 306 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 307 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 308 BSS_CHANGED_ERP_SLOT = 1<<3, 309 BSS_CHANGED_HT = 1<<4, 310 BSS_CHANGED_BASIC_RATES = 1<<5, 311 BSS_CHANGED_BEACON_INT = 1<<6, 312 BSS_CHANGED_BSSID = 1<<7, 313 BSS_CHANGED_BEACON = 1<<8, 314 BSS_CHANGED_BEACON_ENABLED = 1<<9, 315 BSS_CHANGED_CQM = 1<<10, 316 BSS_CHANGED_IBSS = 1<<11, 317 BSS_CHANGED_ARP_FILTER = 1<<12, 318 BSS_CHANGED_QOS = 1<<13, 319 BSS_CHANGED_IDLE = 1<<14, 320 BSS_CHANGED_SSID = 1<<15, 321 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 322 BSS_CHANGED_PS = 1<<17, 323 BSS_CHANGED_TXPOWER = 1<<18, 324 BSS_CHANGED_P2P_PS = 1<<19, 325 BSS_CHANGED_BEACON_INFO = 1<<20, 326 BSS_CHANGED_BANDWIDTH = 1<<21, 327 BSS_CHANGED_OCB = 1<<22, 328 BSS_CHANGED_MU_GROUPS = 1<<23, 329 330 /* when adding here, make sure to change ieee80211_reconfig */ 331 }; 332 333 /* 334 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 335 * of addresses for an interface increase beyond this value, hardware ARP 336 * filtering will be disabled. 337 */ 338 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 339 340 /** 341 * enum ieee80211_event_type - event to be notified to the low level driver 342 * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver. 343 * @MLME_EVENT: event related to MLME 344 * @BAR_RX_EVENT: a BAR was received 345 * @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because 346 * they timed out. This won't be called for each frame released, but only 347 * once each time the timeout triggers. 348 */ 349 enum ieee80211_event_type { 350 RSSI_EVENT, 351 MLME_EVENT, 352 BAR_RX_EVENT, 353 BA_FRAME_TIMEOUT, 354 }; 355 356 /** 357 * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT 358 * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver. 359 * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver. 360 */ 361 enum ieee80211_rssi_event_data { 362 RSSI_EVENT_HIGH, 363 RSSI_EVENT_LOW, 364 }; 365 366 /** 367 * struct ieee80211_rssi_event - data attached to an %RSSI_EVENT 368 * @data: See &enum ieee80211_rssi_event_data 369 */ 370 struct ieee80211_rssi_event { 371 enum ieee80211_rssi_event_data data; 372 }; 373 374 /** 375 * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT 376 * @AUTH_EVENT: the MLME operation is authentication 377 * @ASSOC_EVENT: the MLME operation is association 378 * @DEAUTH_RX_EVENT: deauth received.. 379 * @DEAUTH_TX_EVENT: deauth sent. 380 */ 381 enum ieee80211_mlme_event_data { 382 AUTH_EVENT, 383 ASSOC_EVENT, 384 DEAUTH_RX_EVENT, 385 DEAUTH_TX_EVENT, 386 }; 387 388 /** 389 * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT 390 * @MLME_SUCCESS: the MLME operation completed successfully. 391 * @MLME_DENIED: the MLME operation was denied by the peer. 392 * @MLME_TIMEOUT: the MLME operation timed out. 393 */ 394 enum ieee80211_mlme_event_status { 395 MLME_SUCCESS, 396 MLME_DENIED, 397 MLME_TIMEOUT, 398 }; 399 400 /** 401 * struct ieee80211_mlme_event - data attached to an %MLME_EVENT 402 * @data: See &enum ieee80211_mlme_event_data 403 * @status: See &enum ieee80211_mlme_event_status 404 * @reason: the reason code if applicable 405 */ 406 struct ieee80211_mlme_event { 407 enum ieee80211_mlme_event_data data; 408 enum ieee80211_mlme_event_status status; 409 u16 reason; 410 }; 411 412 /** 413 * struct ieee80211_ba_event - data attached for BlockAck related events 414 * @sta: pointer to the &ieee80211_sta to which this event relates 415 * @tid: the tid 416 * @ssn: the starting sequence number (for %BAR_RX_EVENT) 417 */ 418 struct ieee80211_ba_event { 419 struct ieee80211_sta *sta; 420 u16 tid; 421 u16 ssn; 422 }; 423 424 /** 425 * struct ieee80211_event - event to be sent to the driver 426 * @type: The event itself. See &enum ieee80211_event_type. 427 * @rssi: relevant if &type is %RSSI_EVENT 428 * @mlme: relevant if &type is %AUTH_EVENT 429 * @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT 430 * @u:union holding the fields above 431 */ 432 struct ieee80211_event { 433 enum ieee80211_event_type type; 434 union { 435 struct ieee80211_rssi_event rssi; 436 struct ieee80211_mlme_event mlme; 437 struct ieee80211_ba_event ba; 438 } u; 439 }; 440 441 /** 442 * struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data 443 * 444 * This structure describes the group id data of VHT MU-MIMO 445 * 446 * @membership: 64 bits array - a bit is set if station is member of the group 447 * @position: 2 bits per group id indicating the position in the group 448 */ 449 struct ieee80211_mu_group_data { 450 u8 membership[WLAN_MEMBERSHIP_LEN]; 451 u8 position[WLAN_USER_POSITION_LEN]; 452 }; 453 454 /** 455 * struct ieee80211_bss_conf - holds the BSS's changing parameters 456 * 457 * This structure keeps information about a BSS (and an association 458 * to that BSS) that can change during the lifetime of the BSS. 459 * 460 * @assoc: association status 461 * @ibss_joined: indicates whether this station is part of an IBSS 462 * or not 463 * @ibss_creator: indicates if a new IBSS network is being created 464 * @aid: association ID number, valid only when @assoc is true 465 * @use_cts_prot: use CTS protection 466 * @use_short_preamble: use 802.11b short preamble 467 * @use_short_slot: use short slot time (only relevant for ERP) 468 * @dtim_period: num of beacons before the next DTIM, for beaconing, 469 * valid in station mode only if after the driver was notified 470 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then. 471 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 472 * as it may have been received during scanning long ago). If the 473 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 474 * only come from a beacon, but might not become valid until after 475 * association when a beacon is received (which is notified with the 476 * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice. 477 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 478 * the driver/device can use this to calculate synchronisation 479 * (see @sync_tsf). See also sync_dtim_count important notice. 480 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 481 * is requested, see @sync_tsf/@sync_device_ts. 482 * IMPORTANT: These three sync_* parameters would possibly be out of sync 483 * by the time the driver will use them. The synchronized view is currently 484 * guaranteed only in certain callbacks. 485 * @beacon_int: beacon interval 486 * @assoc_capability: capabilities taken from assoc resp 487 * @basic_rates: bitmap of basic rates, each bit stands for an 488 * index into the rate table configured by the driver in 489 * the current band. 490 * @beacon_rate: associated AP's beacon TX rate 491 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 492 * @bssid: The BSSID for this BSS 493 * @enable_beacon: whether beaconing should be enabled or not 494 * @chandef: Channel definition for this BSS -- the hardware might be 495 * configured a higher bandwidth than this BSS uses, for example. 496 * @mu_group: VHT MU-MIMO group membership data 497 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 498 * This field is only valid when the channel is a wide HT/VHT channel. 499 * Note that with TDLS this can be the case (channel is HT, protection must 500 * be used from this field) even when the BSS association isn't using HT. 501 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 502 * implies disabled. As with the cfg80211 callback, a change here should 503 * cause an event to be sent indicating where the current value is in 504 * relation to the newly configured threshold. 505 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 506 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 507 * may filter ARP queries targeted for other addresses than listed here. 508 * The driver must allow ARP queries targeted for all address listed here 509 * to pass through. An empty list implies no ARP queries need to pass. 510 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 511 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 512 * array size), it's up to the driver what to do in that case. 513 * @qos: This is a QoS-enabled BSS. 514 * @idle: This interface is idle. There's also a global idle flag in the 515 * hardware config which may be more appropriate depending on what 516 * your driver/device needs to do. 517 * @ps: power-save mode (STA only). This flag is NOT affected by 518 * offchannel/dynamic_ps operations. 519 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode. 520 * @ssid_len: Length of SSID given in @ssid. 521 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 522 * @txpower: TX power in dBm 523 * @txpower_type: TX power adjustment used to control per packet Transmit 524 * Power Control (TPC) in lower driver for the current vif. In particular 525 * TPC is enabled if value passed in %txpower_type is 526 * NL80211_TX_POWER_LIMITED (allow using less than specified from 527 * userspace), whereas TPC is disabled if %txpower_type is set to 528 * NL80211_TX_POWER_FIXED (use value configured from userspace) 529 * @p2p_noa_attr: P2P NoA attribute for P2P powersave 530 * @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed 531 * to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS 532 * if it has associated clients without P2P PS support. 533 */ 534 struct ieee80211_bss_conf { 535 const u8 *bssid; 536 /* association related data */ 537 bool assoc, ibss_joined; 538 bool ibss_creator; 539 u16 aid; 540 /* erp related data */ 541 bool use_cts_prot; 542 bool use_short_preamble; 543 bool use_short_slot; 544 bool enable_beacon; 545 u8 dtim_period; 546 u16 beacon_int; 547 u16 assoc_capability; 548 u64 sync_tsf; 549 u32 sync_device_ts; 550 u8 sync_dtim_count; 551 u32 basic_rates; 552 struct ieee80211_rate *beacon_rate; 553 int mcast_rate[NUM_NL80211_BANDS]; 554 u16 ht_operation_mode; 555 s32 cqm_rssi_thold; 556 u32 cqm_rssi_hyst; 557 struct cfg80211_chan_def chandef; 558 struct ieee80211_mu_group_data mu_group; 559 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 560 int arp_addr_cnt; 561 bool qos; 562 bool idle; 563 bool ps; 564 u8 ssid[IEEE80211_MAX_SSID_LEN]; 565 size_t ssid_len; 566 bool hidden_ssid; 567 int txpower; 568 enum nl80211_tx_power_setting txpower_type; 569 struct ieee80211_p2p_noa_attr p2p_noa_attr; 570 bool allow_p2p_go_ps; 571 }; 572 573 /** 574 * enum mac80211_tx_info_flags - flags to describe transmission information/status 575 * 576 * These flags are used with the @flags member of &ieee80211_tx_info. 577 * 578 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 579 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 580 * number to this frame, taking care of not overwriting the fragment 581 * number and increasing the sequence number only when the 582 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 583 * assign sequence numbers to QoS-data frames but cannot do so correctly 584 * for non-QoS-data and management frames because beacons need them from 585 * that counter as well and mac80211 cannot guarantee proper sequencing. 586 * If this flag is set, the driver should instruct the hardware to 587 * assign a sequence number to the frame or assign one itself. Cf. IEEE 588 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 589 * beacons and always be clear for frames without a sequence number field. 590 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 591 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 592 * station 593 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 594 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 595 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 596 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 597 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 598 * because the destination STA was in powersave mode. Note that to 599 * avoid race conditions, the filter must be set by the hardware or 600 * firmware upon receiving a frame that indicates that the station 601 * went to sleep (must be done on device to filter frames already on 602 * the queue) and may only be unset after mac80211 gives the OK for 603 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 604 * since only then is it guaranteed that no more frames are in the 605 * hardware queue. 606 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 607 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 608 * is for the whole aggregation. 609 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 610 * so consider using block ack request (BAR). 611 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 612 * set by rate control algorithms to indicate probe rate, will 613 * be cleared for fragmented frames (except on the last fragment) 614 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 615 * that a frame can be transmitted while the queues are stopped for 616 * off-channel operation. 617 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 618 * used to indicate that a pending frame requires TX processing before 619 * it can be sent out. 620 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 621 * used to indicate that a frame was already retried due to PS 622 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 623 * used to indicate frame should not be encrypted 624 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 625 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 626 * be sent although the station is in powersave mode. 627 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 628 * transmit function after the current frame, this can be used 629 * by drivers to kick the DMA queue only if unset or when the 630 * queue gets full. 631 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 632 * after TX status because the destination was asleep, it must not 633 * be modified again (no seqno assignment, crypto, etc.) 634 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 635 * code for connection establishment, this indicates that its status 636 * should kick the MLME state machine. 637 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 638 * MLME command (internal to mac80211 to figure out whether to send TX 639 * status to user space) 640 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 641 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 642 * frame and selects the maximum number of streams that it can use. 643 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 644 * the off-channel channel when a remain-on-channel offload is done 645 * in hardware -- normal packets still flow and are expected to be 646 * handled properly by the device. 647 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 648 * testing. It will be sent out with incorrect Michael MIC key to allow 649 * TKIP countermeasures to be tested. 650 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 651 * This flag is actually used for management frame especially for P2P 652 * frames not being sent at CCK rate in 2GHz band. 653 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 654 * when its status is reported the service period ends. For frames in 655 * an SP that mac80211 transmits, it is already set; for driver frames 656 * the driver may set this flag. It is also used to do the same for 657 * PS-Poll responses. 658 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 659 * This flag is used to send nullfunc frame at minimum rate when 660 * the nullfunc is used for connection monitoring purpose. 661 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 662 * would be fragmented by size (this is optional, only used for 663 * monitor injection). 664 * @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with 665 * IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without 666 * any errors (like issues specific to the driver/HW). 667 * This flag must not be set for frames that don't request no-ack 668 * behaviour with IEEE80211_TX_CTL_NO_ACK. 669 * 670 * Note: If you have to add new flags to the enumeration, then don't 671 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 672 */ 673 enum mac80211_tx_info_flags { 674 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 675 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 676 IEEE80211_TX_CTL_NO_ACK = BIT(2), 677 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 678 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 679 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 680 IEEE80211_TX_CTL_AMPDU = BIT(6), 681 IEEE80211_TX_CTL_INJECTED = BIT(7), 682 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 683 IEEE80211_TX_STAT_ACK = BIT(9), 684 IEEE80211_TX_STAT_AMPDU = BIT(10), 685 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 686 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 687 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 688 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 689 IEEE80211_TX_INTFL_RETRIED = BIT(15), 690 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 691 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 692 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 693 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 694 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 695 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 696 IEEE80211_TX_CTL_LDPC = BIT(22), 697 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 698 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 699 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 700 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 701 IEEE80211_TX_STATUS_EOSP = BIT(28), 702 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 703 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 704 IEEE80211_TX_STAT_NOACK_TRANSMITTED = BIT(31), 705 }; 706 707 #define IEEE80211_TX_CTL_STBC_SHIFT 23 708 709 /** 710 * enum mac80211_tx_control_flags - flags to describe transmit control 711 * 712 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control 713 * protocol frame (e.g. EAP) 714 * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll 715 * frame (PS-Poll or uAPSD). 716 * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information 717 * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame 718 * 719 * These flags are used in tx_info->control.flags. 720 */ 721 enum mac80211_tx_control_flags { 722 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 723 IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1), 724 IEEE80211_TX_CTRL_RATE_INJECT = BIT(2), 725 IEEE80211_TX_CTRL_AMSDU = BIT(3), 726 }; 727 728 /* 729 * This definition is used as a mask to clear all temporary flags, which are 730 * set by the tx handlers for each transmission attempt by the mac80211 stack. 731 */ 732 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 733 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 734 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 735 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 736 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 737 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 738 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 739 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 740 741 /** 742 * enum mac80211_rate_control_flags - per-rate flags set by the 743 * Rate Control algorithm. 744 * 745 * These flags are set by the Rate control algorithm for each rate during tx, 746 * in the @flags member of struct ieee80211_tx_rate. 747 * 748 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 749 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 750 * This is set if the current BSS requires ERP protection. 751 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 752 * @IEEE80211_TX_RC_MCS: HT rate. 753 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 754 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 755 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 756 * Greenfield mode. 757 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 758 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 759 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 760 * (80+80 isn't supported yet) 761 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 762 * adjacent 20 MHz channels, if the current channel type is 763 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 764 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 765 */ 766 enum mac80211_rate_control_flags { 767 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 768 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 769 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 770 771 /* rate index is an HT/VHT MCS instead of an index */ 772 IEEE80211_TX_RC_MCS = BIT(3), 773 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 774 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 775 IEEE80211_TX_RC_DUP_DATA = BIT(6), 776 IEEE80211_TX_RC_SHORT_GI = BIT(7), 777 IEEE80211_TX_RC_VHT_MCS = BIT(8), 778 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 779 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 780 }; 781 782 783 /* there are 40 bytes if you don't need the rateset to be kept */ 784 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 785 786 /* if you do need the rateset, then you have less space */ 787 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 788 789 /* maximum number of rate stages */ 790 #define IEEE80211_TX_MAX_RATES 4 791 792 /* maximum number of rate table entries */ 793 #define IEEE80211_TX_RATE_TABLE_SIZE 4 794 795 /** 796 * struct ieee80211_tx_rate - rate selection/status 797 * 798 * @idx: rate index to attempt to send with 799 * @flags: rate control flags (&enum mac80211_rate_control_flags) 800 * @count: number of tries in this rate before going to the next rate 801 * 802 * A value of -1 for @idx indicates an invalid rate and, if used 803 * in an array of retry rates, that no more rates should be tried. 804 * 805 * When used for transmit status reporting, the driver should 806 * always report the rate along with the flags it used. 807 * 808 * &struct ieee80211_tx_info contains an array of these structs 809 * in the control information, and it will be filled by the rate 810 * control algorithm according to what should be sent. For example, 811 * if this array contains, in the format { <idx>, <count> } the 812 * information 813 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 814 * then this means that the frame should be transmitted 815 * up to twice at rate 3, up to twice at rate 2, and up to four 816 * times at rate 1 if it doesn't get acknowledged. Say it gets 817 * acknowledged by the peer after the fifth attempt, the status 818 * information should then contain 819 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 820 * since it was transmitted twice at rate 3, twice at rate 2 821 * and once at rate 1 after which we received an acknowledgement. 822 */ 823 struct ieee80211_tx_rate { 824 s8 idx; 825 u16 count:5, 826 flags:11; 827 } __packed; 828 829 #define IEEE80211_MAX_TX_RETRY 31 830 831 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 832 u8 mcs, u8 nss) 833 { 834 WARN_ON(mcs & ~0xF); 835 WARN_ON((nss - 1) & ~0x7); 836 rate->idx = ((nss - 1) << 4) | mcs; 837 } 838 839 static inline u8 840 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 841 { 842 return rate->idx & 0xF; 843 } 844 845 static inline u8 846 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 847 { 848 return (rate->idx >> 4) + 1; 849 } 850 851 /** 852 * struct ieee80211_tx_info - skb transmit information 853 * 854 * This structure is placed in skb->cb for three uses: 855 * (1) mac80211 TX control - mac80211 tells the driver what to do 856 * (2) driver internal use (if applicable) 857 * (3) TX status information - driver tells mac80211 what happened 858 * 859 * @flags: transmit info flags, defined above 860 * @band: the band to transmit on (use for checking for races) 861 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 862 * @ack_frame_id: internal frame ID for TX status, used internally 863 * @control: union for control data 864 * @status: union for status data 865 * @driver_data: array of driver_data pointers 866 * @ampdu_ack_len: number of acked aggregated frames. 867 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 868 * @ampdu_len: number of aggregated frames. 869 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 870 * @ack_signal: signal strength of the ACK frame 871 */ 872 struct ieee80211_tx_info { 873 /* common information */ 874 u32 flags; 875 u8 band; 876 877 u8 hw_queue; 878 879 u16 ack_frame_id; 880 881 union { 882 struct { 883 union { 884 /* rate control */ 885 struct { 886 struct ieee80211_tx_rate rates[ 887 IEEE80211_TX_MAX_RATES]; 888 s8 rts_cts_rate_idx; 889 u8 use_rts:1; 890 u8 use_cts_prot:1; 891 u8 short_preamble:1; 892 u8 skip_table:1; 893 /* 2 bytes free */ 894 }; 895 /* only needed before rate control */ 896 unsigned long jiffies; 897 }; 898 /* NB: vif can be NULL for injected frames */ 899 union { 900 /* NB: vif can be NULL for injected frames */ 901 struct ieee80211_vif *vif; 902 903 /* When packets are enqueued on txq it's easy 904 * to re-construct the vif pointer. There's no 905 * more space in tx_info so it can be used to 906 * store the necessary enqueue time for packet 907 * sojourn time computation. 908 */ 909 codel_time_t enqueue_time; 910 }; 911 struct ieee80211_key_conf *hw_key; 912 u32 flags; 913 /* 4 bytes free */ 914 } control; 915 struct { 916 u64 cookie; 917 } ack; 918 struct { 919 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 920 s32 ack_signal; 921 u8 ampdu_ack_len; 922 u8 ampdu_len; 923 u8 antenna; 924 u16 tx_time; 925 void *status_driver_data[19 / sizeof(void *)]; 926 } status; 927 struct { 928 struct ieee80211_tx_rate driver_rates[ 929 IEEE80211_TX_MAX_RATES]; 930 u8 pad[4]; 931 932 void *rate_driver_data[ 933 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 934 }; 935 void *driver_data[ 936 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 937 }; 938 }; 939 940 /** 941 * struct ieee80211_scan_ies - descriptors for different blocks of IEs 942 * 943 * This structure is used to point to different blocks of IEs in HW scan 944 * and scheduled scan. These blocks contain the IEs passed by userspace 945 * and the ones generated by mac80211. 946 * 947 * @ies: pointers to band specific IEs. 948 * @len: lengths of band_specific IEs. 949 * @common_ies: IEs for all bands (especially vendor specific ones) 950 * @common_ie_len: length of the common_ies 951 */ 952 struct ieee80211_scan_ies { 953 const u8 *ies[NUM_NL80211_BANDS]; 954 size_t len[NUM_NL80211_BANDS]; 955 const u8 *common_ies; 956 size_t common_ie_len; 957 }; 958 959 960 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 961 { 962 return (struct ieee80211_tx_info *)skb->cb; 963 } 964 965 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 966 { 967 return (struct ieee80211_rx_status *)skb->cb; 968 } 969 970 /** 971 * ieee80211_tx_info_clear_status - clear TX status 972 * 973 * @info: The &struct ieee80211_tx_info to be cleared. 974 * 975 * When the driver passes an skb back to mac80211, it must report 976 * a number of things in TX status. This function clears everything 977 * in the TX status but the rate control information (it does clear 978 * the count since you need to fill that in anyway). 979 * 980 * NOTE: You can only use this function if you do NOT use 981 * info->driver_data! Use info->rate_driver_data 982 * instead if you need only the less space that allows. 983 */ 984 static inline void 985 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 986 { 987 int i; 988 989 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 990 offsetof(struct ieee80211_tx_info, control.rates)); 991 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 992 offsetof(struct ieee80211_tx_info, driver_rates)); 993 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 994 /* clear the rate counts */ 995 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 996 info->status.rates[i].count = 0; 997 998 BUILD_BUG_ON( 999 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 1000 memset(&info->status.ampdu_ack_len, 0, 1001 sizeof(struct ieee80211_tx_info) - 1002 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 1003 } 1004 1005 1006 /** 1007 * enum mac80211_rx_flags - receive flags 1008 * 1009 * These flags are used with the @flag member of &struct ieee80211_rx_status. 1010 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 1011 * Use together with %RX_FLAG_MMIC_STRIPPED. 1012 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 1013 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 1014 * verification has been done by the hardware. 1015 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 1016 * If this flag is set, the stack cannot do any replay detection 1017 * hence the driver or hardware will have to do that. 1018 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this 1019 * flag indicates that the PN was verified for replay protection. 1020 * Note that this flag is also currently only supported when a frame 1021 * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set) 1022 * @RX_FLAG_DUP_VALIDATED: The driver should set this flag if it did 1023 * de-duplication by itself. 1024 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 1025 * the frame. 1026 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 1027 * the frame. 1028 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 1029 * field) is valid and contains the time the first symbol of the MPDU 1030 * was received. This is useful in monitor mode and for proper IBSS 1031 * merging. 1032 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 1033 * field) is valid and contains the time the last symbol of the MPDU 1034 * (including FCS) was received. 1035 * @RX_FLAG_MACTIME_PLCP_START: The timestamp passed in the RX status (@mactime 1036 * field) is valid and contains the time the SYNC preamble was received. 1037 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 1038 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 1039 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 1040 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 1041 * @RX_FLAG_SHORT_GI: Short guard interval was used 1042 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 1043 * Valid only for data frames (mainly A-MPDU) 1044 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 1045 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 1046 * to hw.radiotap_mcs_details to advertise that fact 1047 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 1048 * number (@ampdu_reference) must be populated and be a distinct number for 1049 * each A-MPDU 1050 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 1051 * subframes of a single A-MPDU 1052 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 1053 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 1054 * on this subframe 1055 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 1056 * is stored in the @ampdu_delimiter_crc field) 1057 * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was 1058 * done by the hardware 1059 * @RX_FLAG_LDPC: LDPC was used 1060 * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without 1061 * processing it in any regular way. 1062 * This is useful if drivers offload some frames but still want to report 1063 * them for sniffing purposes. 1064 * @RX_FLAG_SKIP_MONITOR: Process and report frame to all interfaces except 1065 * monitor interfaces. 1066 * This is useful if drivers offload some frames but still want to report 1067 * them for sniffing purposes. 1068 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 1069 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 1070 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 1071 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 1072 * subframes instead of a one huge frame for performance reasons. 1073 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 1074 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 1075 * the 3rd (last) one must not have this flag set. The flag is used to 1076 * deal with retransmission/duplication recovery properly since A-MSDU 1077 * subframes share the same sequence number. Reported subframes can be 1078 * either regular MSDU or singly A-MSDUs. Subframes must not be 1079 * interleaved with other frames. 1080 * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific 1081 * radiotap data in the skb->data (before the frame) as described by 1082 * the &struct ieee80211_vendor_radiotap. 1083 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. 1084 * This is used for AMSDU subframes which can have the same PN as 1085 * the first subframe. 1086 */ 1087 enum mac80211_rx_flags { 1088 RX_FLAG_MMIC_ERROR = BIT(0), 1089 RX_FLAG_DECRYPTED = BIT(1), 1090 RX_FLAG_MACTIME_PLCP_START = BIT(2), 1091 RX_FLAG_MMIC_STRIPPED = BIT(3), 1092 RX_FLAG_IV_STRIPPED = BIT(4), 1093 RX_FLAG_FAILED_FCS_CRC = BIT(5), 1094 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 1095 RX_FLAG_MACTIME_START = BIT(7), 1096 RX_FLAG_SHORTPRE = BIT(8), 1097 RX_FLAG_HT = BIT(9), 1098 RX_FLAG_40MHZ = BIT(10), 1099 RX_FLAG_SHORT_GI = BIT(11), 1100 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 1101 RX_FLAG_HT_GF = BIT(13), 1102 RX_FLAG_AMPDU_DETAILS = BIT(14), 1103 RX_FLAG_PN_VALIDATED = BIT(15), 1104 RX_FLAG_DUP_VALIDATED = BIT(16), 1105 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 1106 RX_FLAG_AMPDU_IS_LAST = BIT(18), 1107 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 1108 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 1109 RX_FLAG_MACTIME_END = BIT(21), 1110 RX_FLAG_VHT = BIT(22), 1111 RX_FLAG_LDPC = BIT(23), 1112 RX_FLAG_ONLY_MONITOR = BIT(24), 1113 RX_FLAG_SKIP_MONITOR = BIT(25), 1114 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 1115 RX_FLAG_10MHZ = BIT(28), 1116 RX_FLAG_5MHZ = BIT(29), 1117 RX_FLAG_AMSDU_MORE = BIT(30), 1118 RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), 1119 RX_FLAG_MIC_STRIPPED = BIT_ULL(32), 1120 RX_FLAG_ALLOW_SAME_PN = BIT_ULL(33), 1121 }; 1122 1123 #define RX_FLAG_STBC_SHIFT 26 1124 1125 /** 1126 * enum mac80211_rx_vht_flags - receive VHT flags 1127 * 1128 * These flags are used with the @vht_flag member of 1129 * &struct ieee80211_rx_status. 1130 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 1131 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 1132 * @RX_VHT_FLAG_BF: packet was beamformed 1133 */ 1134 1135 enum mac80211_rx_vht_flags { 1136 RX_VHT_FLAG_80MHZ = BIT(0), 1137 RX_VHT_FLAG_160MHZ = BIT(1), 1138 RX_VHT_FLAG_BF = BIT(2), 1139 }; 1140 1141 /** 1142 * struct ieee80211_rx_status - receive status 1143 * 1144 * The low-level driver should provide this information (the subset 1145 * supported by hardware) to the 802.11 code with each received 1146 * frame, in the skb's control buffer (cb). 1147 * 1148 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 1149 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 1150 * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is 1151 * needed only for beacons and probe responses that update the scan cache. 1152 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 1153 * it but can store it and pass it back to the driver for synchronisation 1154 * @band: the active band when this frame was received 1155 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 1156 * This field must be set for management frames, but isn't strictly needed 1157 * for data (other) frames - for those it only affects radiotap reporting. 1158 * @signal: signal strength when receiving this frame, either in dBm, in dB or 1159 * unspecified depending on the hardware capabilities flags 1160 * @IEEE80211_HW_SIGNAL_* 1161 * @chains: bitmask of receive chains for which separate signal strength 1162 * values were filled. 1163 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 1164 * support dB or unspecified units) 1165 * @antenna: antenna used 1166 * @rate_idx: index of data rate into band's supported rates or MCS index if 1167 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 1168 * @vht_nss: number of streams (VHT only) 1169 * @flag: %RX_FLAG_* 1170 * @vht_flag: %RX_VHT_FLAG_* 1171 * @rx_flags: internal RX flags for mac80211 1172 * @ampdu_reference: A-MPDU reference number, must be a different value for 1173 * each A-MPDU but the same for each subframe within one A-MPDU 1174 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 1175 */ 1176 struct ieee80211_rx_status { 1177 u64 mactime; 1178 u64 boottime_ns; 1179 u32 device_timestamp; 1180 u32 ampdu_reference; 1181 u64 flag; 1182 u16 freq; 1183 u8 vht_flag; 1184 u8 rate_idx; 1185 u8 vht_nss; 1186 u8 rx_flags; 1187 u8 band; 1188 u8 antenna; 1189 s8 signal; 1190 u8 chains; 1191 s8 chain_signal[IEEE80211_MAX_CHAINS]; 1192 u8 ampdu_delimiter_crc; 1193 }; 1194 1195 /** 1196 * struct ieee80211_vendor_radiotap - vendor radiotap data information 1197 * @present: presence bitmap for this vendor namespace 1198 * (this could be extended in the future if any vendor needs more 1199 * bits, the radiotap spec does allow for that) 1200 * @align: radiotap vendor namespace alignment. This defines the needed 1201 * alignment for the @data field below, not for the vendor namespace 1202 * description itself (which has a fixed 2-byte alignment) 1203 * Must be a power of two, and be set to at least 1! 1204 * @oui: radiotap vendor namespace OUI 1205 * @subns: radiotap vendor sub namespace 1206 * @len: radiotap vendor sub namespace skip length, if alignment is done 1207 * then that's added to this, i.e. this is only the length of the 1208 * @data field. 1209 * @pad: number of bytes of padding after the @data, this exists so that 1210 * the skb data alignment can be preserved even if the data has odd 1211 * length 1212 * @data: the actual vendor namespace data 1213 * 1214 * This struct, including the vendor data, goes into the skb->data before 1215 * the 802.11 header. It's split up in mac80211 using the align/oui/subns 1216 * data. 1217 */ 1218 struct ieee80211_vendor_radiotap { 1219 u32 present; 1220 u8 align; 1221 u8 oui[3]; 1222 u8 subns; 1223 u8 pad; 1224 u16 len; 1225 u8 data[]; 1226 } __packed; 1227 1228 /** 1229 * enum ieee80211_conf_flags - configuration flags 1230 * 1231 * Flags to define PHY configuration options 1232 * 1233 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 1234 * to determine for example whether to calculate timestamps for packets 1235 * or not, do not use instead of filter flags! 1236 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 1237 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 1238 * meaning that the hardware still wakes up for beacons, is able to 1239 * transmit frames and receive the possible acknowledgment frames. 1240 * Not to be confused with hardware specific wakeup/sleep states, 1241 * driver is responsible for that. See the section "Powersave support" 1242 * for more. 1243 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 1244 * the driver should be prepared to handle configuration requests but 1245 * may turn the device off as much as possible. Typically, this flag will 1246 * be set when an interface is set UP but not associated or scanning, but 1247 * it can also be unset in that case when monitor interfaces are active. 1248 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 1249 * operating channel. 1250 */ 1251 enum ieee80211_conf_flags { 1252 IEEE80211_CONF_MONITOR = (1<<0), 1253 IEEE80211_CONF_PS = (1<<1), 1254 IEEE80211_CONF_IDLE = (1<<2), 1255 IEEE80211_CONF_OFFCHANNEL = (1<<3), 1256 }; 1257 1258 1259 /** 1260 * enum ieee80211_conf_changed - denotes which configuration changed 1261 * 1262 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 1263 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 1264 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 1265 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 1266 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 1267 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 1268 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 1269 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 1270 * Note that this is only valid if channel contexts are not used, 1271 * otherwise each channel context has the number of chains listed. 1272 */ 1273 enum ieee80211_conf_changed { 1274 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 1275 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 1276 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 1277 IEEE80211_CONF_CHANGE_PS = BIT(4), 1278 IEEE80211_CONF_CHANGE_POWER = BIT(5), 1279 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 1280 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 1281 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 1282 }; 1283 1284 /** 1285 * enum ieee80211_smps_mode - spatial multiplexing power save mode 1286 * 1287 * @IEEE80211_SMPS_AUTOMATIC: automatic 1288 * @IEEE80211_SMPS_OFF: off 1289 * @IEEE80211_SMPS_STATIC: static 1290 * @IEEE80211_SMPS_DYNAMIC: dynamic 1291 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1292 */ 1293 enum ieee80211_smps_mode { 1294 IEEE80211_SMPS_AUTOMATIC, 1295 IEEE80211_SMPS_OFF, 1296 IEEE80211_SMPS_STATIC, 1297 IEEE80211_SMPS_DYNAMIC, 1298 1299 /* keep last */ 1300 IEEE80211_SMPS_NUM_MODES, 1301 }; 1302 1303 /** 1304 * struct ieee80211_conf - configuration of the device 1305 * 1306 * This struct indicates how the driver shall configure the hardware. 1307 * 1308 * @flags: configuration flags defined above 1309 * 1310 * @listen_interval: listen interval in units of beacon interval 1311 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1312 * in power saving. Power saving will not be enabled until a beacon 1313 * has been received and the DTIM period is known. 1314 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1315 * powersave documentation below. This variable is valid only when 1316 * the CONF_PS flag is set. 1317 * 1318 * @power_level: requested transmit power (in dBm), backward compatibility 1319 * value only that is set to the minimum of all interfaces 1320 * 1321 * @chandef: the channel definition to tune to 1322 * @radar_enabled: whether radar detection is enabled 1323 * 1324 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1325 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1326 * but actually means the number of transmissions not the number of retries 1327 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1328 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1329 * number of transmissions not the number of retries 1330 * 1331 * @smps_mode: spatial multiplexing powersave mode; note that 1332 * %IEEE80211_SMPS_STATIC is used when the device is not 1333 * configured for an HT channel. 1334 * Note that this is only valid if channel contexts are not used, 1335 * otherwise each channel context has the number of chains listed. 1336 */ 1337 struct ieee80211_conf { 1338 u32 flags; 1339 int power_level, dynamic_ps_timeout; 1340 1341 u16 listen_interval; 1342 u8 ps_dtim_period; 1343 1344 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1345 1346 struct cfg80211_chan_def chandef; 1347 bool radar_enabled; 1348 enum ieee80211_smps_mode smps_mode; 1349 }; 1350 1351 /** 1352 * struct ieee80211_channel_switch - holds the channel switch data 1353 * 1354 * The information provided in this structure is required for channel switch 1355 * operation. 1356 * 1357 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1358 * Function (TSF) timer when the frame containing the channel switch 1359 * announcement was received. This is simply the rx.mactime parameter 1360 * the driver passed into mac80211. 1361 * @device_timestamp: arbitrary timestamp for the device, this is the 1362 * rx.device_timestamp parameter the driver passed to mac80211. 1363 * @block_tx: Indicates whether transmission must be blocked before the 1364 * scheduled channel switch, as indicated by the AP. 1365 * @chandef: the new channel to switch to 1366 * @count: the number of TBTT's until the channel switch event 1367 */ 1368 struct ieee80211_channel_switch { 1369 u64 timestamp; 1370 u32 device_timestamp; 1371 bool block_tx; 1372 struct cfg80211_chan_def chandef; 1373 u8 count; 1374 }; 1375 1376 /** 1377 * enum ieee80211_vif_flags - virtual interface flags 1378 * 1379 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1380 * on this virtual interface to avoid unnecessary CPU wakeups 1381 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1382 * monitoring on this virtual interface -- i.e. it can monitor 1383 * connection quality related parameters, such as the RSSI level and 1384 * provide notifications if configured trigger levels are reached. 1385 * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this 1386 * interface. This flag should be set during interface addition, 1387 * but may be set/cleared as late as authentication to an AP. It is 1388 * only valid for managed/station mode interfaces. 1389 * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes 1390 * and send P2P_PS notification to the driver if NOA changed, even 1391 * this is not pure P2P vif. 1392 */ 1393 enum ieee80211_vif_flags { 1394 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1395 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1396 IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2), 1397 IEEE80211_VIF_GET_NOA_UPDATE = BIT(3), 1398 }; 1399 1400 /** 1401 * struct ieee80211_vif - per-interface data 1402 * 1403 * Data in this structure is continually present for driver 1404 * use during the life of a virtual interface. 1405 * 1406 * @type: type of this virtual interface 1407 * @bss_conf: BSS configuration for this interface, either our own 1408 * or the BSS we're associated to 1409 * @addr: address of this interface 1410 * @p2p: indicates whether this AP or STA interface is a p2p 1411 * interface, i.e. a GO or p2p-sta respectively 1412 * @csa_active: marks whether a channel switch is going on. Internally it is 1413 * write-protected by sdata_lock and local->mtx so holding either is fine 1414 * for read access. 1415 * @mu_mimo_owner: indicates interface owns MU-MIMO capability 1416 * @driver_flags: flags/capabilities the driver has for this interface, 1417 * these need to be set (or cleared) when the interface is added 1418 * or, if supported by the driver, the interface type is changed 1419 * at runtime, mac80211 will never touch this field 1420 * @hw_queue: hardware queue for each AC 1421 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1422 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1423 * when it is not assigned. This pointer is RCU-protected due to the TX 1424 * path needing to access it; even though the netdev carrier will always 1425 * be off when it is %NULL there can still be races and packets could be 1426 * processed after it switches back to %NULL. 1427 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1428 * interface debug files. Note that it will be NULL for the virtual 1429 * monitor interface (if that is requested.) 1430 * @probe_req_reg: probe requests should be reported to mac80211 for this 1431 * interface. 1432 * @drv_priv: data area for driver use, will always be aligned to 1433 * sizeof(void *). 1434 * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) 1435 */ 1436 struct ieee80211_vif { 1437 enum nl80211_iftype type; 1438 struct ieee80211_bss_conf bss_conf; 1439 u8 addr[ETH_ALEN]; 1440 bool p2p; 1441 bool csa_active; 1442 bool mu_mimo_owner; 1443 1444 u8 cab_queue; 1445 u8 hw_queue[IEEE80211_NUM_ACS]; 1446 1447 struct ieee80211_txq *txq; 1448 1449 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1450 1451 u32 driver_flags; 1452 1453 #ifdef CONFIG_MAC80211_DEBUGFS 1454 struct dentry *debugfs_dir; 1455 #endif 1456 1457 unsigned int probe_req_reg; 1458 1459 /* must be last */ 1460 u8 drv_priv[0] __aligned(sizeof(void *)); 1461 }; 1462 1463 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1464 { 1465 #ifdef CONFIG_MAC80211_MESH 1466 return vif->type == NL80211_IFTYPE_MESH_POINT; 1467 #endif 1468 return false; 1469 } 1470 1471 /** 1472 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1473 * @wdev: the wdev to get the vif for 1474 * 1475 * This can be used by mac80211 drivers with direct cfg80211 APIs 1476 * (like the vendor commands) that get a wdev. 1477 * 1478 * Note that this function may return %NULL if the given wdev isn't 1479 * associated with a vif that the driver knows about (e.g. monitor 1480 * or AP_VLAN interfaces.) 1481 */ 1482 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1483 1484 /** 1485 * ieee80211_vif_to_wdev - return a wdev struct from a vif 1486 * @vif: the vif to get the wdev for 1487 * 1488 * This can be used by mac80211 drivers with direct cfg80211 APIs 1489 * (like the vendor commands) that needs to get the wdev for a vif. 1490 * 1491 * Note that this function may return %NULL if the given wdev isn't 1492 * associated with a vif that the driver knows about (e.g. monitor 1493 * or AP_VLAN interfaces.) 1494 */ 1495 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); 1496 1497 /** 1498 * enum ieee80211_key_flags - key flags 1499 * 1500 * These flags are used for communication about keys between the driver 1501 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1502 * 1503 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1504 * driver to indicate that it requires IV generation for this 1505 * particular key. Setting this flag does not necessarily mean that SKBs 1506 * will have sufficient tailroom for ICV or MIC. 1507 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1508 * the driver for a TKIP key if it requires Michael MIC 1509 * generation in software. 1510 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1511 * that the key is pairwise rather then a shared key. 1512 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1513 * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames 1514 * (MFP) to be done in software. 1515 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1516 * if space should be prepared for the IV, but the IV 1517 * itself should not be generated. Do not set together with 1518 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does 1519 * not necessarily mean that SKBs will have sufficient tailroom for ICV or 1520 * MIC. 1521 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1522 * management frames. The flag can help drivers that have a hardware 1523 * crypto implementation that doesn't deal with management frames 1524 * properly by allowing them to not upload the keys to hardware and 1525 * fall back to software crypto. Note that this flag deals only with 1526 * RX, if your crypto engine can't deal with TX you can also set the 1527 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1528 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the 1529 * driver for a CCMP/GCMP key to indicate that is requires IV generation 1530 * only for managment frames (MFP). 1531 * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the 1532 * driver for a key to indicate that sufficient tailroom must always 1533 * be reserved for ICV or MIC, even when HW encryption is enabled. 1534 */ 1535 enum ieee80211_key_flags { 1536 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), 1537 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), 1538 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), 1539 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), 1540 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), 1541 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), 1542 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), 1543 IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7), 1544 }; 1545 1546 /** 1547 * struct ieee80211_key_conf - key information 1548 * 1549 * This key information is given by mac80211 to the driver by 1550 * the set_key() callback in &struct ieee80211_ops. 1551 * 1552 * @hw_key_idx: To be set by the driver, this is the key index the driver 1553 * wants to be given when a frame is transmitted and needs to be 1554 * encrypted in hardware. 1555 * @cipher: The key's cipher suite selector. 1556 * @tx_pn: PN used for TX keys, may be used by the driver as well if it 1557 * needs to do software PN assignment by itself (e.g. due to TSO) 1558 * @flags: key flags, see &enum ieee80211_key_flags. 1559 * @keyidx: the key index (0-3) 1560 * @keylen: key material length 1561 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1562 * data block: 1563 * - Temporal Encryption Key (128 bits) 1564 * - Temporal Authenticator Tx MIC Key (64 bits) 1565 * - Temporal Authenticator Rx MIC Key (64 bits) 1566 * @icv_len: The ICV length for this key type 1567 * @iv_len: The IV length for this key type 1568 */ 1569 struct ieee80211_key_conf { 1570 atomic64_t tx_pn; 1571 u32 cipher; 1572 u8 icv_len; 1573 u8 iv_len; 1574 u8 hw_key_idx; 1575 u8 flags; 1576 s8 keyidx; 1577 u8 keylen; 1578 u8 key[0]; 1579 }; 1580 1581 #define IEEE80211_MAX_PN_LEN 16 1582 1583 #define TKIP_PN_TO_IV16(pn) ((u16)(pn & 0xffff)) 1584 #define TKIP_PN_TO_IV32(pn) ((u32)((pn >> 16) & 0xffffffff)) 1585 1586 /** 1587 * struct ieee80211_key_seq - key sequence counter 1588 * 1589 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 1590 * @ccmp: PN data, most significant byte first (big endian, 1591 * reverse order than in packet) 1592 * @aes_cmac: PN data, most significant byte first (big endian, 1593 * reverse order than in packet) 1594 * @aes_gmac: PN data, most significant byte first (big endian, 1595 * reverse order than in packet) 1596 * @gcmp: PN data, most significant byte first (big endian, 1597 * reverse order than in packet) 1598 * @hw: data for HW-only (e.g. cipher scheme) keys 1599 */ 1600 struct ieee80211_key_seq { 1601 union { 1602 struct { 1603 u32 iv32; 1604 u16 iv16; 1605 } tkip; 1606 struct { 1607 u8 pn[6]; 1608 } ccmp; 1609 struct { 1610 u8 pn[6]; 1611 } aes_cmac; 1612 struct { 1613 u8 pn[6]; 1614 } aes_gmac; 1615 struct { 1616 u8 pn[6]; 1617 } gcmp; 1618 struct { 1619 u8 seq[IEEE80211_MAX_PN_LEN]; 1620 u8 seq_len; 1621 } hw; 1622 }; 1623 }; 1624 1625 /** 1626 * struct ieee80211_cipher_scheme - cipher scheme 1627 * 1628 * This structure contains a cipher scheme information defining 1629 * the secure packet crypto handling. 1630 * 1631 * @cipher: a cipher suite selector 1632 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1633 * @hdr_len: a length of a security header used the cipher 1634 * @pn_len: a length of a packet number in the security header 1635 * @pn_off: an offset of pn from the beginning of the security header 1636 * @key_idx_off: an offset of key index byte in the security header 1637 * @key_idx_mask: a bit mask of key_idx bits 1638 * @key_idx_shift: a bit shift needed to get key_idx 1639 * key_idx value calculation: 1640 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1641 * @mic_len: a mic length in bytes 1642 */ 1643 struct ieee80211_cipher_scheme { 1644 u32 cipher; 1645 u16 iftype; 1646 u8 hdr_len; 1647 u8 pn_len; 1648 u8 pn_off; 1649 u8 key_idx_off; 1650 u8 key_idx_mask; 1651 u8 key_idx_shift; 1652 u8 mic_len; 1653 }; 1654 1655 /** 1656 * enum set_key_cmd - key command 1657 * 1658 * Used with the set_key() callback in &struct ieee80211_ops, this 1659 * indicates whether a key is being removed or added. 1660 * 1661 * @SET_KEY: a key is set 1662 * @DISABLE_KEY: a key must be disabled 1663 */ 1664 enum set_key_cmd { 1665 SET_KEY, DISABLE_KEY, 1666 }; 1667 1668 /** 1669 * enum ieee80211_sta_state - station state 1670 * 1671 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1672 * this is a special state for add/remove transitions 1673 * @IEEE80211_STA_NONE: station exists without special state 1674 * @IEEE80211_STA_AUTH: station is authenticated 1675 * @IEEE80211_STA_ASSOC: station is associated 1676 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1677 */ 1678 enum ieee80211_sta_state { 1679 /* NOTE: These need to be ordered correctly! */ 1680 IEEE80211_STA_NOTEXIST, 1681 IEEE80211_STA_NONE, 1682 IEEE80211_STA_AUTH, 1683 IEEE80211_STA_ASSOC, 1684 IEEE80211_STA_AUTHORIZED, 1685 }; 1686 1687 /** 1688 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1689 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1690 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1691 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1692 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1693 * (including 80+80 MHz) 1694 * 1695 * Implementation note: 20 must be zero to be initialized 1696 * correctly, the values must be sorted. 1697 */ 1698 enum ieee80211_sta_rx_bandwidth { 1699 IEEE80211_STA_RX_BW_20 = 0, 1700 IEEE80211_STA_RX_BW_40, 1701 IEEE80211_STA_RX_BW_80, 1702 IEEE80211_STA_RX_BW_160, 1703 }; 1704 1705 /** 1706 * struct ieee80211_sta_rates - station rate selection table 1707 * 1708 * @rcu_head: RCU head used for freeing the table on update 1709 * @rate: transmit rates/flags to be used by default. 1710 * Overriding entries per-packet is possible by using cb tx control. 1711 */ 1712 struct ieee80211_sta_rates { 1713 struct rcu_head rcu_head; 1714 struct { 1715 s8 idx; 1716 u8 count; 1717 u8 count_cts; 1718 u8 count_rts; 1719 u16 flags; 1720 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1721 }; 1722 1723 /** 1724 * struct ieee80211_sta - station table entry 1725 * 1726 * A station table entry represents a station we are possibly 1727 * communicating with. Since stations are RCU-managed in 1728 * mac80211, any ieee80211_sta pointer you get access to must 1729 * either be protected by rcu_read_lock() explicitly or implicitly, 1730 * or you must take good care to not use such a pointer after a 1731 * call to your sta_remove callback that removed it. 1732 * 1733 * @addr: MAC address 1734 * @aid: AID we assigned to the station if we're an AP 1735 * @supp_rates: Bitmap of supported rates (per band) 1736 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1737 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1738 * @wme: indicates whether the STA supports QoS/WME (if local devices does, 1739 * otherwise always false) 1740 * @drv_priv: data area for driver use, will always be aligned to 1741 * sizeof(void *), size is determined in hw information. 1742 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1743 * if wme is supported. 1744 * @max_sp: max Service Period. Only valid if wme is supported. 1745 * @bandwidth: current bandwidth the station can receive with 1746 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1747 * station can receive at the moment, changed by operating mode 1748 * notifications and capabilities. The value is only valid after 1749 * the station moves to associated state. 1750 * @smps_mode: current SMPS mode (off, static or dynamic) 1751 * @rates: rate control selection table 1752 * @tdls: indicates whether the STA is a TDLS peer 1753 * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only 1754 * valid if the STA is a TDLS peer in the first place. 1755 * @mfp: indicates whether the STA uses management frame protection or not. 1756 * @max_amsdu_subframes: indicates the maximal number of MSDUs in a single 1757 * A-MSDU. Taken from the Extended Capabilities element. 0 means 1758 * unlimited. 1759 * @max_amsdu_len: indicates the maximal length of an A-MSDU in bytes. This 1760 * field is always valid for packets with a VHT preamble. For packets 1761 * with a HT preamble, additional limits apply: 1762 * + If the skb is transmitted as part of a BA agreement, the 1763 * A-MSDU maximal size is min(max_amsdu_len, 4065) bytes. 1764 * + If the skb is not part of a BA aggreement, the A-MSDU maximal 1765 * size is min(max_amsdu_len, 7935) bytes. 1766 * Both additional HT limits must be enforced by the low level driver. 1767 * This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2). 1768 * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not. 1769 * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control. 1770 * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) 1771 */ 1772 struct ieee80211_sta { 1773 u32 supp_rates[NUM_NL80211_BANDS]; 1774 u8 addr[ETH_ALEN]; 1775 u16 aid; 1776 struct ieee80211_sta_ht_cap ht_cap; 1777 struct ieee80211_sta_vht_cap vht_cap; 1778 bool wme; 1779 u8 uapsd_queues; 1780 u8 max_sp; 1781 u8 rx_nss; 1782 enum ieee80211_sta_rx_bandwidth bandwidth; 1783 enum ieee80211_smps_mode smps_mode; 1784 struct ieee80211_sta_rates __rcu *rates; 1785 bool tdls; 1786 bool tdls_initiator; 1787 bool mfp; 1788 u8 max_amsdu_subframes; 1789 u16 max_amsdu_len; 1790 bool support_p2p_ps; 1791 u16 max_rc_amsdu_len; 1792 1793 struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; 1794 1795 /* must be last */ 1796 u8 drv_priv[0] __aligned(sizeof(void *)); 1797 }; 1798 1799 /** 1800 * enum sta_notify_cmd - sta notify command 1801 * 1802 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1803 * indicates if an associated station made a power state transition. 1804 * 1805 * @STA_NOTIFY_SLEEP: a station is now sleeping 1806 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1807 */ 1808 enum sta_notify_cmd { 1809 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1810 }; 1811 1812 /** 1813 * struct ieee80211_tx_control - TX control data 1814 * 1815 * @sta: station table entry, this sta pointer may be NULL and 1816 * it is not allowed to copy the pointer, due to RCU. 1817 */ 1818 struct ieee80211_tx_control { 1819 struct ieee80211_sta *sta; 1820 }; 1821 1822 /** 1823 * struct ieee80211_txq - Software intermediate tx queue 1824 * 1825 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 1826 * @sta: station table entry, %NULL for per-vif queue 1827 * @tid: the TID for this queue (unused for per-vif queue) 1828 * @ac: the AC for this queue 1829 * @drv_priv: driver private area, sized by hw->txq_data_size 1830 * 1831 * The driver can obtain packets from this queue by calling 1832 * ieee80211_tx_dequeue(). 1833 */ 1834 struct ieee80211_txq { 1835 struct ieee80211_vif *vif; 1836 struct ieee80211_sta *sta; 1837 u8 tid; 1838 u8 ac; 1839 1840 /* must be last */ 1841 u8 drv_priv[0] __aligned(sizeof(void *)); 1842 }; 1843 1844 /** 1845 * enum ieee80211_hw_flags - hardware flags 1846 * 1847 * These flags are used to indicate hardware capabilities to 1848 * the stack. Generally, flags here should have their meaning 1849 * done in a way that the simplest hardware doesn't need setting 1850 * any particular flags. There are some exceptions to this rule, 1851 * however, so you are advised to review these flags carefully. 1852 * 1853 * @IEEE80211_HW_HAS_RATE_CONTROL: 1854 * The hardware or firmware includes rate control, and cannot be 1855 * controlled by the stack. As such, no rate control algorithm 1856 * should be instantiated, and the TX rate reported to userspace 1857 * will be taken from the TX status instead of the rate control 1858 * algorithm. 1859 * Note that this requires that the driver implement a number of 1860 * callbacks so it has the correct information, it needs to have 1861 * the @set_rts_threshold callback and must look at the BSS config 1862 * @use_cts_prot for G/N protection, @use_short_slot for slot 1863 * timing in 2.4 GHz and @use_short_preamble for preambles for 1864 * CCK frames. 1865 * 1866 * @IEEE80211_HW_RX_INCLUDES_FCS: 1867 * Indicates that received frames passed to the stack include 1868 * the FCS at the end. 1869 * 1870 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1871 * Some wireless LAN chipsets buffer broadcast/multicast frames 1872 * for power saving stations in the hardware/firmware and others 1873 * rely on the host system for such buffering. This option is used 1874 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1875 * multicast frames when there are power saving stations so that 1876 * the driver can fetch them with ieee80211_get_buffered_bc(). 1877 * 1878 * @IEEE80211_HW_SIGNAL_UNSPEC: 1879 * Hardware can provide signal values but we don't know its units. We 1880 * expect values between 0 and @max_signal. 1881 * If possible please provide dB or dBm instead. 1882 * 1883 * @IEEE80211_HW_SIGNAL_DBM: 1884 * Hardware gives signal values in dBm, decibel difference from 1885 * one milliwatt. This is the preferred method since it is standardized 1886 * between different devices. @max_signal does not need to be set. 1887 * 1888 * @IEEE80211_HW_SPECTRUM_MGMT: 1889 * Hardware supports spectrum management defined in 802.11h 1890 * Measurement, Channel Switch, Quieting, TPC 1891 * 1892 * @IEEE80211_HW_AMPDU_AGGREGATION: 1893 * Hardware supports 11n A-MPDU aggregation. 1894 * 1895 * @IEEE80211_HW_SUPPORTS_PS: 1896 * Hardware has power save support (i.e. can go to sleep). 1897 * 1898 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1899 * Hardware requires nullfunc frame handling in stack, implies 1900 * stack support for dynamic PS. 1901 * 1902 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1903 * Hardware has support for dynamic PS. 1904 * 1905 * @IEEE80211_HW_MFP_CAPABLE: 1906 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1907 * 1908 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1909 * Hardware can provide ack status reports of Tx frames to 1910 * the stack. 1911 * 1912 * @IEEE80211_HW_CONNECTION_MONITOR: 1913 * The hardware performs its own connection monitoring, including 1914 * periodic keep-alives to the AP and probing the AP on beacon loss. 1915 * 1916 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1917 * This device needs to get data from beacon before association (i.e. 1918 * dtim_period). 1919 * 1920 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1921 * per-station GTKs as used by IBSS RSN or during fast transition. If 1922 * the device doesn't support per-station GTKs, but can be asked not 1923 * to decrypt group addressed frames, then IBSS RSN support is still 1924 * possible but software crypto will be used. Advertise the wiphy flag 1925 * only in that case. 1926 * 1927 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1928 * autonomously manages the PS status of connected stations. When 1929 * this flag is set mac80211 will not trigger PS mode for connected 1930 * stations based on the PM bit of incoming frames. 1931 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1932 * the PS mode of connected stations. 1933 * 1934 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1935 * setup strictly in HW. mac80211 should not attempt to do this in 1936 * software. 1937 * 1938 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1939 * a virtual monitor interface when monitor interfaces are the only 1940 * active interfaces. 1941 * 1942 * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to 1943 * be created. It is expected user-space will create vifs as 1944 * desired (and thus have them named as desired). 1945 * 1946 * @IEEE80211_HW_SW_CRYPTO_CONTROL: The driver wants to control which of the 1947 * crypto algorithms can be done in software - so don't automatically 1948 * try to fall back to it if hardware crypto fails, but do so only if 1949 * the driver returns 1. This also forces the driver to advertise its 1950 * supported cipher suites. 1951 * 1952 * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit, 1953 * this currently requires only the ability to calculate the duration 1954 * for frames. 1955 * 1956 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1957 * queue mapping in order to use different queues (not just one per AC) 1958 * for different virtual interfaces. See the doc section on HW queue 1959 * control for more details. 1960 * 1961 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1962 * selection table provided by the rate control algorithm. 1963 * 1964 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1965 * P2P Interface. This will be honoured even if more than one interface 1966 * is supported. 1967 * 1968 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1969 * only, to allow getting TBTT of a DTIM beacon. 1970 * 1971 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1972 * and can cope with CCK rates in an aggregation session (e.g. by not 1973 * using aggregation for such frames.) 1974 * 1975 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1976 * for a single active channel while using channel contexts. When support 1977 * is not enabled the default action is to disconnect when getting the 1978 * CSA frame. 1979 * 1980 * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload 1981 * or tailroom of TX skbs without copying them first. 1982 * 1983 * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands 1984 * in one command, mac80211 doesn't have to run separate scans per band. 1985 * 1986 * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth 1987 * than then BSS bandwidth for a TDLS link on the base channel. 1988 * 1989 * @IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU: The driver supports receiving A-MSDUs 1990 * within A-MPDU. 1991 * 1992 * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status 1993 * for sent beacons. 1994 * 1995 * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each 1996 * station has a unique address, i.e. each station entry can be identified 1997 * by just its MAC address; this prevents, for example, the same station 1998 * from connecting to two virtual AP interfaces at the same time. 1999 * 2000 * @IEEE80211_HW_SUPPORTS_REORDERING_BUFFER: Hardware (or driver) manages the 2001 * reordering buffer internally, guaranteeing mac80211 receives frames in 2002 * order and does not need to manage its own reorder buffer or BA session 2003 * timeout. 2004 * 2005 * @IEEE80211_HW_USES_RSS: The device uses RSS and thus requires parallel RX, 2006 * which implies using per-CPU station statistics. 2007 * 2008 * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated 2009 * A-MSDU frames. Requires software tx queueing and fast-xmit support. 2010 * When not using minstrel/minstrel_ht rate control, the driver must 2011 * limit the maximum A-MSDU size based on the current tx rate by setting 2012 * max_rc_amsdu_len in struct ieee80211_sta. 2013 * 2014 * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list 2015 * skbs, needed for zero-copy software A-MSDU. 2016 * 2017 * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays 2018 */ 2019 enum ieee80211_hw_flags { 2020 IEEE80211_HW_HAS_RATE_CONTROL, 2021 IEEE80211_HW_RX_INCLUDES_FCS, 2022 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING, 2023 IEEE80211_HW_SIGNAL_UNSPEC, 2024 IEEE80211_HW_SIGNAL_DBM, 2025 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC, 2026 IEEE80211_HW_SPECTRUM_MGMT, 2027 IEEE80211_HW_AMPDU_AGGREGATION, 2028 IEEE80211_HW_SUPPORTS_PS, 2029 IEEE80211_HW_PS_NULLFUNC_STACK, 2030 IEEE80211_HW_SUPPORTS_DYNAMIC_PS, 2031 IEEE80211_HW_MFP_CAPABLE, 2032 IEEE80211_HW_WANT_MONITOR_VIF, 2033 IEEE80211_HW_NO_AUTO_VIF, 2034 IEEE80211_HW_SW_CRYPTO_CONTROL, 2035 IEEE80211_HW_SUPPORT_FAST_XMIT, 2036 IEEE80211_HW_REPORTS_TX_ACK_STATUS, 2037 IEEE80211_HW_CONNECTION_MONITOR, 2038 IEEE80211_HW_QUEUE_CONTROL, 2039 IEEE80211_HW_SUPPORTS_PER_STA_GTK, 2040 IEEE80211_HW_AP_LINK_PS, 2041 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW, 2042 IEEE80211_HW_SUPPORTS_RC_TABLE, 2043 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF, 2044 IEEE80211_HW_TIMING_BEACON_ONLY, 2045 IEEE80211_HW_SUPPORTS_HT_CCK_RATES, 2046 IEEE80211_HW_CHANCTX_STA_CSA, 2047 IEEE80211_HW_SUPPORTS_CLONED_SKBS, 2048 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS, 2049 IEEE80211_HW_TDLS_WIDER_BW, 2050 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU, 2051 IEEE80211_HW_BEACON_TX_STATUS, 2052 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR, 2053 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER, 2054 IEEE80211_HW_USES_RSS, 2055 IEEE80211_HW_TX_AMSDU, 2056 IEEE80211_HW_TX_FRAG_LIST, 2057 2058 /* keep last, obviously */ 2059 NUM_IEEE80211_HW_FLAGS 2060 }; 2061 2062 /** 2063 * struct ieee80211_hw - hardware information and state 2064 * 2065 * This structure contains the configuration and hardware 2066 * information for an 802.11 PHY. 2067 * 2068 * @wiphy: This points to the &struct wiphy allocated for this 2069 * 802.11 PHY. You must fill in the @perm_addr and @dev 2070 * members of this structure using SET_IEEE80211_DEV() 2071 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 2072 * bands (with channels, bitrates) are registered here. 2073 * 2074 * @conf: &struct ieee80211_conf, device configuration, don't use. 2075 * 2076 * @priv: pointer to private area that was allocated for driver use 2077 * along with this structure. 2078 * 2079 * @flags: hardware flags, see &enum ieee80211_hw_flags. 2080 * 2081 * @extra_tx_headroom: headroom to reserve in each transmit skb 2082 * for use by the driver (e.g. for transmit headers.) 2083 * 2084 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 2085 * Can be used by drivers to add extra IEs. 2086 * 2087 * @max_signal: Maximum value for signal (rssi) in RX information, used 2088 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 2089 * 2090 * @max_listen_interval: max listen interval in units of beacon interval 2091 * that HW supports 2092 * 2093 * @queues: number of available hardware transmit queues for 2094 * data packets. WMM/QoS requires at least four, these 2095 * queues need to have configurable access parameters. 2096 * 2097 * @rate_control_algorithm: rate control algorithm for this hardware. 2098 * If unset (NULL), the default algorithm will be used. Must be 2099 * set before calling ieee80211_register_hw(). 2100 * 2101 * @vif_data_size: size (in bytes) of the drv_priv data area 2102 * within &struct ieee80211_vif. 2103 * @sta_data_size: size (in bytes) of the drv_priv data area 2104 * within &struct ieee80211_sta. 2105 * @chanctx_data_size: size (in bytes) of the drv_priv data area 2106 * within &struct ieee80211_chanctx_conf. 2107 * @txq_data_size: size (in bytes) of the drv_priv data area 2108 * within @struct ieee80211_txq. 2109 * 2110 * @max_rates: maximum number of alternate rate retry stages the hw 2111 * can handle. 2112 * @max_report_rates: maximum number of alternate rate retry stages 2113 * the hw can report back. 2114 * @max_rate_tries: maximum number of tries for each stage 2115 * 2116 * @max_rx_aggregation_subframes: maximum buffer size (number of 2117 * sub-frames) to be used for A-MPDU block ack receiver 2118 * aggregation. 2119 * This is only relevant if the device has restrictions on the 2120 * number of subframes, if it relies on mac80211 to do reordering 2121 * it shouldn't be set. 2122 * 2123 * @max_tx_aggregation_subframes: maximum number of subframes in an 2124 * aggregate an HT driver will transmit. Though ADDBA will advertise 2125 * a constant value of 64 as some older APs can crash if the window 2126 * size is smaller (an example is LinkSys WRT120N with FW v1.0.07 2127 * build 002 Jun 18 2012). 2128 * 2129 * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum 2130 * of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list. 2131 * 2132 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 2133 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 2134 * 2135 * @radiotap_mcs_details: lists which MCS information can the HW 2136 * reports, by default it is set to _MCS, _GI and _BW but doesn't 2137 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 2138 * adding _BW is supported today. 2139 * 2140 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 2141 * the default is _GI | _BANDWIDTH. 2142 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 2143 * 2144 * @netdev_features: netdev features to be set in each netdev created 2145 * from this HW. Note that not all features are usable with mac80211, 2146 * other features will be rejected during HW registration. 2147 * 2148 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 2149 * for each access category if it is uAPSD trigger-enabled and delivery- 2150 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 2151 * Each bit corresponds to different AC. Value '1' in specific bit means 2152 * that corresponding AC is both trigger- and delivery-enabled. '0' means 2153 * neither enabled. 2154 * 2155 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 2156 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 2157 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 2158 * 2159 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 2160 * @cipher_schemes: a pointer to an array of cipher scheme definitions 2161 * supported by HW. 2162 */ 2163 struct ieee80211_hw { 2164 struct ieee80211_conf conf; 2165 struct wiphy *wiphy; 2166 const char *rate_control_algorithm; 2167 void *priv; 2168 unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)]; 2169 unsigned int extra_tx_headroom; 2170 unsigned int extra_beacon_tailroom; 2171 int vif_data_size; 2172 int sta_data_size; 2173 int chanctx_data_size; 2174 int txq_data_size; 2175 u16 queues; 2176 u16 max_listen_interval; 2177 s8 max_signal; 2178 u8 max_rates; 2179 u8 max_report_rates; 2180 u8 max_rate_tries; 2181 u8 max_rx_aggregation_subframes; 2182 u8 max_tx_aggregation_subframes; 2183 u8 max_tx_fragments; 2184 u8 offchannel_tx_hw_queue; 2185 u8 radiotap_mcs_details; 2186 u16 radiotap_vht_details; 2187 netdev_features_t netdev_features; 2188 u8 uapsd_queues; 2189 u8 uapsd_max_sp_len; 2190 u8 n_cipher_schemes; 2191 const struct ieee80211_cipher_scheme *cipher_schemes; 2192 }; 2193 2194 static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw, 2195 enum ieee80211_hw_flags flg) 2196 { 2197 return test_bit(flg, hw->flags); 2198 } 2199 #define ieee80211_hw_check(hw, flg) _ieee80211_hw_check(hw, IEEE80211_HW_##flg) 2200 2201 static inline void _ieee80211_hw_set(struct ieee80211_hw *hw, 2202 enum ieee80211_hw_flags flg) 2203 { 2204 return __set_bit(flg, hw->flags); 2205 } 2206 #define ieee80211_hw_set(hw, flg) _ieee80211_hw_set(hw, IEEE80211_HW_##flg) 2207 2208 /** 2209 * struct ieee80211_scan_request - hw scan request 2210 * 2211 * @ies: pointers different parts of IEs (in req.ie) 2212 * @req: cfg80211 request. 2213 */ 2214 struct ieee80211_scan_request { 2215 struct ieee80211_scan_ies ies; 2216 2217 /* Keep last */ 2218 struct cfg80211_scan_request req; 2219 }; 2220 2221 /** 2222 * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters 2223 * 2224 * @sta: peer this TDLS channel-switch request/response came from 2225 * @chandef: channel referenced in a TDLS channel-switch request 2226 * @action_code: see &enum ieee80211_tdls_actioncode 2227 * @status: channel-switch response status 2228 * @timestamp: time at which the frame was received 2229 * @switch_time: switch-timing parameter received in the frame 2230 * @switch_timeout: switch-timing parameter received in the frame 2231 * @tmpl_skb: TDLS switch-channel response template 2232 * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb 2233 */ 2234 struct ieee80211_tdls_ch_sw_params { 2235 struct ieee80211_sta *sta; 2236 struct cfg80211_chan_def *chandef; 2237 u8 action_code; 2238 u32 status; 2239 u32 timestamp; 2240 u16 switch_time; 2241 u16 switch_timeout; 2242 struct sk_buff *tmpl_skb; 2243 u32 ch_sw_tm_ie; 2244 }; 2245 2246 /** 2247 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 2248 * 2249 * @wiphy: the &struct wiphy which we want to query 2250 * 2251 * mac80211 drivers can use this to get to their respective 2252 * &struct ieee80211_hw. Drivers wishing to get to their own private 2253 * structure can then access it via hw->priv. Note that mac802111 drivers should 2254 * not use wiphy_priv() to try to get their private driver structure as this 2255 * is already used internally by mac80211. 2256 * 2257 * Return: The mac80211 driver hw struct of @wiphy. 2258 */ 2259 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 2260 2261 /** 2262 * SET_IEEE80211_DEV - set device for 802.11 hardware 2263 * 2264 * @hw: the &struct ieee80211_hw to set the device for 2265 * @dev: the &struct device of this 802.11 device 2266 */ 2267 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 2268 { 2269 set_wiphy_dev(hw->wiphy, dev); 2270 } 2271 2272 /** 2273 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 2274 * 2275 * @hw: the &struct ieee80211_hw to set the MAC address for 2276 * @addr: the address to set 2277 */ 2278 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, const u8 *addr) 2279 { 2280 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 2281 } 2282 2283 static inline struct ieee80211_rate * 2284 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 2285 const struct ieee80211_tx_info *c) 2286 { 2287 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 2288 return NULL; 2289 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 2290 } 2291 2292 static inline struct ieee80211_rate * 2293 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 2294 const struct ieee80211_tx_info *c) 2295 { 2296 if (c->control.rts_cts_rate_idx < 0) 2297 return NULL; 2298 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 2299 } 2300 2301 static inline struct ieee80211_rate * 2302 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 2303 const struct ieee80211_tx_info *c, int idx) 2304 { 2305 if (c->control.rates[idx + 1].idx < 0) 2306 return NULL; 2307 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 2308 } 2309 2310 /** 2311 * ieee80211_free_txskb - free TX skb 2312 * @hw: the hardware 2313 * @skb: the skb 2314 * 2315 * Free a transmit skb. Use this funtion when some failure 2316 * to transmit happened and thus status cannot be reported. 2317 */ 2318 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 2319 2320 /** 2321 * DOC: Hardware crypto acceleration 2322 * 2323 * mac80211 is capable of taking advantage of many hardware 2324 * acceleration designs for encryption and decryption operations. 2325 * 2326 * The set_key() callback in the &struct ieee80211_ops for a given 2327 * device is called to enable hardware acceleration of encryption and 2328 * decryption. The callback takes a @sta parameter that will be NULL 2329 * for default keys or keys used for transmission only, or point to 2330 * the station information for the peer for individual keys. 2331 * Multiple transmission keys with the same key index may be used when 2332 * VLANs are configured for an access point. 2333 * 2334 * When transmitting, the TX control data will use the @hw_key_idx 2335 * selected by the driver by modifying the &struct ieee80211_key_conf 2336 * pointed to by the @key parameter to the set_key() function. 2337 * 2338 * The set_key() call for the %SET_KEY command should return 0 if 2339 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 2340 * added; if you return 0 then hw_key_idx must be assigned to the 2341 * hardware key index, you are free to use the full u8 range. 2342 * 2343 * Note that in the case that the @IEEE80211_HW_SW_CRYPTO_CONTROL flag is 2344 * set, mac80211 will not automatically fall back to software crypto if 2345 * enabling hardware crypto failed. The set_key() call may also return the 2346 * value 1 to permit this specific key/algorithm to be done in software. 2347 * 2348 * When the cmd is %DISABLE_KEY then it must succeed. 2349 * 2350 * Note that it is permissible to not decrypt a frame even if a key 2351 * for it has been uploaded to hardware, the stack will not make any 2352 * decision based on whether a key has been uploaded or not but rather 2353 * based on the receive flags. 2354 * 2355 * The &struct ieee80211_key_conf structure pointed to by the @key 2356 * parameter is guaranteed to be valid until another call to set_key() 2357 * removes it, but it can only be used as a cookie to differentiate 2358 * keys. 2359 * 2360 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 2361 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 2362 * handler. 2363 * The update_tkip_key() call updates the driver with the new phase 1 key. 2364 * This happens every time the iv16 wraps around (every 65536 packets). The 2365 * set_key() call will happen only once for each key (unless the AP did 2366 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 2367 * provided by update_tkip_key only. The trigger that makes mac80211 call this 2368 * handler is software decryption with wrap around of iv16. 2369 * 2370 * The set_default_unicast_key() call updates the default WEP key index 2371 * configured to the hardware for WEP encryption type. This is required 2372 * for devices that support offload of data packets (e.g. ARP responses). 2373 */ 2374 2375 /** 2376 * DOC: Powersave support 2377 * 2378 * mac80211 has support for various powersave implementations. 2379 * 2380 * First, it can support hardware that handles all powersaving by itself, 2381 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 2382 * flag. In that case, it will be told about the desired powersave mode 2383 * with the %IEEE80211_CONF_PS flag depending on the association status. 2384 * The hardware must take care of sending nullfunc frames when necessary, 2385 * i.e. when entering and leaving powersave mode. The hardware is required 2386 * to look at the AID in beacons and signal to the AP that it woke up when 2387 * it finds traffic directed to it. 2388 * 2389 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 2390 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 2391 * with hardware wakeup and sleep states. Driver is responsible for waking 2392 * up the hardware before issuing commands to the hardware and putting it 2393 * back to sleep at appropriate times. 2394 * 2395 * When PS is enabled, hardware needs to wakeup for beacons and receive the 2396 * buffered multicast/broadcast frames after the beacon. Also it must be 2397 * possible to send frames and receive the acknowledment frame. 2398 * 2399 * Other hardware designs cannot send nullfunc frames by themselves and also 2400 * need software support for parsing the TIM bitmap. This is also supported 2401 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 2402 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 2403 * required to pass up beacons. The hardware is still required to handle 2404 * waking up for multicast traffic; if it cannot the driver must handle that 2405 * as best as it can, mac80211 is too slow to do that. 2406 * 2407 * Dynamic powersave is an extension to normal powersave in which the 2408 * hardware stays awake for a user-specified period of time after sending a 2409 * frame so that reply frames need not be buffered and therefore delayed to 2410 * the next wakeup. It's compromise of getting good enough latency when 2411 * there's data traffic and still saving significantly power in idle 2412 * periods. 2413 * 2414 * Dynamic powersave is simply supported by mac80211 enabling and disabling 2415 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 2416 * flag and mac80211 will handle everything automatically. Additionally, 2417 * hardware having support for the dynamic PS feature may set the 2418 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 2419 * dynamic PS mode itself. The driver needs to look at the 2420 * @dynamic_ps_timeout hardware configuration value and use it that value 2421 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 2422 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 2423 * enabled whenever user has enabled powersave. 2424 * 2425 * Driver informs U-APSD client support by enabling 2426 * %IEEE80211_VIF_SUPPORTS_UAPSD flag. The mode is configured through the 2427 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS 2428 * Nullfunc frames and stay awake until the service period has ended. To 2429 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 2430 * from that AC are transmitted with powersave enabled. 2431 * 2432 * Note: U-APSD client mode is not yet supported with 2433 * %IEEE80211_HW_PS_NULLFUNC_STACK. 2434 */ 2435 2436 /** 2437 * DOC: Beacon filter support 2438 * 2439 * Some hardware have beacon filter support to reduce host cpu wakeups 2440 * which will reduce system power consumption. It usually works so that 2441 * the firmware creates a checksum of the beacon but omits all constantly 2442 * changing elements (TSF, TIM etc). Whenever the checksum changes the 2443 * beacon is forwarded to the host, otherwise it will be just dropped. That 2444 * way the host will only receive beacons where some relevant information 2445 * (for example ERP protection or WMM settings) have changed. 2446 * 2447 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 2448 * interface capability. The driver needs to enable beacon filter support 2449 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 2450 * power save is enabled, the stack will not check for beacon loss and the 2451 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 2452 * 2453 * The time (or number of beacons missed) until the firmware notifies the 2454 * driver of a beacon loss event (which in turn causes the driver to call 2455 * ieee80211_beacon_loss()) should be configurable and will be controlled 2456 * by mac80211 and the roaming algorithm in the future. 2457 * 2458 * Since there may be constantly changing information elements that nothing 2459 * in the software stack cares about, we will, in the future, have mac80211 2460 * tell the driver which information elements are interesting in the sense 2461 * that we want to see changes in them. This will include 2462 * - a list of information element IDs 2463 * - a list of OUIs for the vendor information element 2464 * 2465 * Ideally, the hardware would filter out any beacons without changes in the 2466 * requested elements, but if it cannot support that it may, at the expense 2467 * of some efficiency, filter out only a subset. For example, if the device 2468 * doesn't support checking for OUIs it should pass up all changes in all 2469 * vendor information elements. 2470 * 2471 * Note that change, for the sake of simplification, also includes information 2472 * elements appearing or disappearing from the beacon. 2473 * 2474 * Some hardware supports an "ignore list" instead, just make sure nothing 2475 * that was requested is on the ignore list, and include commonly changing 2476 * information element IDs in the ignore list, for example 11 (BSS load) and 2477 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 2478 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 2479 * it could also include some currently unused IDs. 2480 * 2481 * 2482 * In addition to these capabilities, hardware should support notifying the 2483 * host of changes in the beacon RSSI. This is relevant to implement roaming 2484 * when no traffic is flowing (when traffic is flowing we see the RSSI of 2485 * the received data packets). This can consist in notifying the host when 2486 * the RSSI changes significantly or when it drops below or rises above 2487 * configurable thresholds. In the future these thresholds will also be 2488 * configured by mac80211 (which gets them from userspace) to implement 2489 * them as the roaming algorithm requires. 2490 * 2491 * If the hardware cannot implement this, the driver should ask it to 2492 * periodically pass beacon frames to the host so that software can do the 2493 * signal strength threshold checking. 2494 */ 2495 2496 /** 2497 * DOC: Spatial multiplexing power save 2498 * 2499 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 2500 * power in an 802.11n implementation. For details on the mechanism 2501 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 2502 * "11.2.3 SM power save". 2503 * 2504 * The mac80211 implementation is capable of sending action frames 2505 * to update the AP about the station's SMPS mode, and will instruct 2506 * the driver to enter the specific mode. It will also announce the 2507 * requested SMPS mode during the association handshake. Hardware 2508 * support for this feature is required, and can be indicated by 2509 * hardware flags. 2510 * 2511 * The default mode will be "automatic", which nl80211/cfg80211 2512 * defines to be dynamic SMPS in (regular) powersave, and SMPS 2513 * turned off otherwise. 2514 * 2515 * To support this feature, the driver must set the appropriate 2516 * hardware support flags, and handle the SMPS flag to the config() 2517 * operation. It will then with this mechanism be instructed to 2518 * enter the requested SMPS mode while associated to an HT AP. 2519 */ 2520 2521 /** 2522 * DOC: Frame filtering 2523 * 2524 * mac80211 requires to see many management frames for proper 2525 * operation, and users may want to see many more frames when 2526 * in monitor mode. However, for best CPU usage and power consumption, 2527 * having as few frames as possible percolate through the stack is 2528 * desirable. Hence, the hardware should filter as much as possible. 2529 * 2530 * To achieve this, mac80211 uses filter flags (see below) to tell 2531 * the driver's configure_filter() function which frames should be 2532 * passed to mac80211 and which should be filtered out. 2533 * 2534 * Before configure_filter() is invoked, the prepare_multicast() 2535 * callback is invoked with the parameters @mc_count and @mc_list 2536 * for the combined multicast address list of all virtual interfaces. 2537 * It's use is optional, and it returns a u64 that is passed to 2538 * configure_filter(). Additionally, configure_filter() has the 2539 * arguments @changed_flags telling which flags were changed and 2540 * @total_flags with the new flag states. 2541 * 2542 * If your device has no multicast address filters your driver will 2543 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2544 * parameter to see whether multicast frames should be accepted 2545 * or dropped. 2546 * 2547 * All unsupported flags in @total_flags must be cleared. 2548 * Hardware does not support a flag if it is incapable of _passing_ 2549 * the frame to the stack. Otherwise the driver must ignore 2550 * the flag, but not clear it. 2551 * You must _only_ clear the flag (announce no support for the 2552 * flag to mac80211) if you are not able to pass the packet type 2553 * to the stack (so the hardware always filters it). 2554 * So for example, you should clear @FIF_CONTROL, if your hardware 2555 * always filters control frames. If your hardware always passes 2556 * control frames to the kernel and is incapable of filtering them, 2557 * you do _not_ clear the @FIF_CONTROL flag. 2558 * This rule applies to all other FIF flags as well. 2559 */ 2560 2561 /** 2562 * DOC: AP support for powersaving clients 2563 * 2564 * In order to implement AP and P2P GO modes, mac80211 has support for 2565 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2566 * There currently is no support for sAPSD. 2567 * 2568 * There is one assumption that mac80211 makes, namely that a client 2569 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2570 * Both are supported, and both can be used by the same client, but 2571 * they can't be used concurrently by the same client. This simplifies 2572 * the driver code. 2573 * 2574 * The first thing to keep in mind is that there is a flag for complete 2575 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2576 * mac80211 expects the driver to handle most of the state machine for 2577 * powersaving clients and will ignore the PM bit in incoming frames. 2578 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2579 * stations' powersave transitions. In this mode, mac80211 also doesn't 2580 * handle PS-Poll/uAPSD. 2581 * 2582 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2583 * PM bit in incoming frames for client powersave transitions. When a 2584 * station goes to sleep, we will stop transmitting to it. There is, 2585 * however, a race condition: a station might go to sleep while there is 2586 * data buffered on hardware queues. If the device has support for this 2587 * it will reject frames, and the driver should give the frames back to 2588 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2589 * cause mac80211 to retry the frame when the station wakes up. The 2590 * driver is also notified of powersave transitions by calling its 2591 * @sta_notify callback. 2592 * 2593 * When the station is asleep, it has three choices: it can wake up, 2594 * it can PS-Poll, or it can possibly start a uAPSD service period. 2595 * Waking up is implemented by simply transmitting all buffered (and 2596 * filtered) frames to the station. This is the easiest case. When 2597 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2598 * will inform the driver of this with the @allow_buffered_frames 2599 * callback; this callback is optional. mac80211 will then transmit 2600 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2601 * on each frame. The last frame in the service period (or the only 2602 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2603 * indicate that it ends the service period; as this frame must have 2604 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2605 * When TX status is reported for this frame, the service period is 2606 * marked has having ended and a new one can be started by the peer. 2607 * 2608 * Additionally, non-bufferable MMPDUs can also be transmitted by 2609 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2610 * 2611 * Another race condition can happen on some devices like iwlwifi 2612 * when there are frames queued for the station and it wakes up 2613 * or polls; the frames that are already queued could end up being 2614 * transmitted first instead, causing reordering and/or wrong 2615 * processing of the EOSP. The cause is that allowing frames to be 2616 * transmitted to a certain station is out-of-band communication to 2617 * the device. To allow this problem to be solved, the driver can 2618 * call ieee80211_sta_block_awake() if frames are buffered when it 2619 * is notified that the station went to sleep. When all these frames 2620 * have been filtered (see above), it must call the function again 2621 * to indicate that the station is no longer blocked. 2622 * 2623 * If the driver buffers frames in the driver for aggregation in any 2624 * way, it must use the ieee80211_sta_set_buffered() call when it is 2625 * notified of the station going to sleep to inform mac80211 of any 2626 * TIDs that have frames buffered. Note that when a station wakes up 2627 * this information is reset (hence the requirement to call it when 2628 * informed of the station going to sleep). Then, when a service 2629 * period starts for any reason, @release_buffered_frames is called 2630 * with the number of frames to be released and which TIDs they are 2631 * to come from. In this case, the driver is responsible for setting 2632 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2633 * to help the @more_data parameter is passed to tell the driver if 2634 * there is more data on other TIDs -- the TIDs to release frames 2635 * from are ignored since mac80211 doesn't know how many frames the 2636 * buffers for those TIDs contain. 2637 * 2638 * If the driver also implement GO mode, where absence periods may 2639 * shorten service periods (or abort PS-Poll responses), it must 2640 * filter those response frames except in the case of frames that 2641 * are buffered in the driver -- those must remain buffered to avoid 2642 * reordering. Because it is possible that no frames are released 2643 * in this case, the driver must call ieee80211_sta_eosp() 2644 * to indicate to mac80211 that the service period ended anyway. 2645 * 2646 * Finally, if frames from multiple TIDs are released from mac80211 2647 * but the driver might reorder them, it must clear & set the flags 2648 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2649 * and also take care of the EOSP and MORE_DATA bits in the frame. 2650 * The driver may also use ieee80211_sta_eosp() in this case. 2651 * 2652 * Note that if the driver ever buffers frames other than QoS-data 2653 * frames, it must take care to never send a non-QoS-data frame as 2654 * the last frame in a service period, adding a QoS-nulldata frame 2655 * after a non-QoS-data frame if needed. 2656 */ 2657 2658 /** 2659 * DOC: HW queue control 2660 * 2661 * Before HW queue control was introduced, mac80211 only had a single static 2662 * assignment of per-interface AC software queues to hardware queues. This 2663 * was problematic for a few reasons: 2664 * 1) off-channel transmissions might get stuck behind other frames 2665 * 2) multiple virtual interfaces couldn't be handled correctly 2666 * 3) after-DTIM frames could get stuck behind other frames 2667 * 2668 * To solve this, hardware typically uses multiple different queues for all 2669 * the different usages, and this needs to be propagated into mac80211 so it 2670 * won't have the same problem with the software queues. 2671 * 2672 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2673 * flag that tells it that the driver implements its own queue control. To do 2674 * so, the driver will set up the various queues in each &struct ieee80211_vif 2675 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2676 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2677 * if necessary will queue the frame on the right software queue that mirrors 2678 * the hardware queue. 2679 * Additionally, the driver has to then use these HW queue IDs for the queue 2680 * management functions (ieee80211_stop_queue() et al.) 2681 * 2682 * The driver is free to set up the queue mappings as needed, multiple virtual 2683 * interfaces may map to the same hardware queues if needed. The setup has to 2684 * happen during add_interface or change_interface callbacks. For example, a 2685 * driver supporting station+station and station+AP modes might decide to have 2686 * 10 hardware queues to handle different scenarios: 2687 * 2688 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2689 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2690 * after-DTIM queue for AP: 8 2691 * off-channel queue: 9 2692 * 2693 * It would then set up the hardware like this: 2694 * hw.offchannel_tx_hw_queue = 9 2695 * 2696 * and the first virtual interface that is added as follows: 2697 * vif.hw_queue[IEEE80211_AC_VO] = 0 2698 * vif.hw_queue[IEEE80211_AC_VI] = 1 2699 * vif.hw_queue[IEEE80211_AC_BE] = 2 2700 * vif.hw_queue[IEEE80211_AC_BK] = 3 2701 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2702 * and the second virtual interface with 4-7. 2703 * 2704 * If queue 6 gets full, for example, mac80211 would only stop the second 2705 * virtual interface's BE queue since virtual interface queues are per AC. 2706 * 2707 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2708 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2709 * queue could potentially be shared since mac80211 will look at cab_queue when 2710 * a queue is stopped/woken even if the interface is not in AP mode. 2711 */ 2712 2713 /** 2714 * enum ieee80211_filter_flags - hardware filter flags 2715 * 2716 * These flags determine what the filter in hardware should be 2717 * programmed to let through and what should not be passed to the 2718 * stack. It is always safe to pass more frames than requested, 2719 * but this has negative impact on power consumption. 2720 * 2721 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2722 * by the user or if the hardware is not capable of filtering by 2723 * multicast address. 2724 * 2725 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2726 * %RX_FLAG_FAILED_FCS_CRC for them) 2727 * 2728 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2729 * the %RX_FLAG_FAILED_PLCP_CRC for them 2730 * 2731 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2732 * to the hardware that it should not filter beacons or probe responses 2733 * by BSSID. Filtering them can greatly reduce the amount of processing 2734 * mac80211 needs to do and the amount of CPU wakeups, so you should 2735 * honour this flag if possible. 2736 * 2737 * @FIF_CONTROL: pass control frames (except for PS Poll) addressed to this 2738 * station 2739 * 2740 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2741 * 2742 * @FIF_PSPOLL: pass PS Poll frames 2743 * 2744 * @FIF_PROBE_REQ: pass probe request frames 2745 */ 2746 enum ieee80211_filter_flags { 2747 FIF_ALLMULTI = 1<<1, 2748 FIF_FCSFAIL = 1<<2, 2749 FIF_PLCPFAIL = 1<<3, 2750 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2751 FIF_CONTROL = 1<<5, 2752 FIF_OTHER_BSS = 1<<6, 2753 FIF_PSPOLL = 1<<7, 2754 FIF_PROBE_REQ = 1<<8, 2755 }; 2756 2757 /** 2758 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2759 * 2760 * These flags are used with the ampdu_action() callback in 2761 * &struct ieee80211_ops to indicate which action is needed. 2762 * 2763 * Note that drivers MUST be able to deal with a TX aggregation 2764 * session being stopped even before they OK'ed starting it by 2765 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2766 * might receive the addBA frame and send a delBA right away! 2767 * 2768 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2769 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2770 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2771 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2772 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2773 * queued packets, now unaggregated. After all packets are transmitted the 2774 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2775 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2776 * called when the station is removed. There's no need or reason to call 2777 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2778 * session is gone and removes the station. 2779 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2780 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2781 * now the connection is dropped and the station will be removed. Drivers 2782 * should clean up and drop remaining packets when this is called. 2783 */ 2784 enum ieee80211_ampdu_mlme_action { 2785 IEEE80211_AMPDU_RX_START, 2786 IEEE80211_AMPDU_RX_STOP, 2787 IEEE80211_AMPDU_TX_START, 2788 IEEE80211_AMPDU_TX_STOP_CONT, 2789 IEEE80211_AMPDU_TX_STOP_FLUSH, 2790 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2791 IEEE80211_AMPDU_TX_OPERATIONAL, 2792 }; 2793 2794 /** 2795 * struct ieee80211_ampdu_params - AMPDU action parameters 2796 * 2797 * @action: the ampdu action, value from %ieee80211_ampdu_mlme_action. 2798 * @sta: peer of this AMPDU session 2799 * @tid: tid of the BA session 2800 * @ssn: start sequence number of the session. TX/RX_STOP can pass 0. When 2801 * action is set to %IEEE80211_AMPDU_RX_START the driver passes back the 2802 * actual ssn value used to start the session and writes the value here. 2803 * @buf_size: reorder buffer size (number of subframes). Valid only when the 2804 * action is set to %IEEE80211_AMPDU_RX_START or 2805 * %IEEE80211_AMPDU_TX_OPERATIONAL 2806 * @amsdu: indicates the peer's ability to receive A-MSDU within A-MPDU. 2807 * valid when the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL 2808 * @timeout: BA session timeout. Valid only when the action is set to 2809 * %IEEE80211_AMPDU_RX_START 2810 */ 2811 struct ieee80211_ampdu_params { 2812 enum ieee80211_ampdu_mlme_action action; 2813 struct ieee80211_sta *sta; 2814 u16 tid; 2815 u16 ssn; 2816 u8 buf_size; 2817 bool amsdu; 2818 u16 timeout; 2819 }; 2820 2821 /** 2822 * enum ieee80211_frame_release_type - frame release reason 2823 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2824 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2825 * frame received on trigger-enabled AC 2826 */ 2827 enum ieee80211_frame_release_type { 2828 IEEE80211_FRAME_RELEASE_PSPOLL, 2829 IEEE80211_FRAME_RELEASE_UAPSD, 2830 }; 2831 2832 /** 2833 * enum ieee80211_rate_control_changed - flags to indicate what changed 2834 * 2835 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2836 * to this station changed. The actual bandwidth is in the station 2837 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2838 * flag changes, for HT and VHT the bandwidth field changes. 2839 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2840 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2841 * changed (in IBSS mode) due to discovering more information about 2842 * the peer. 2843 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2844 * by the peer 2845 */ 2846 enum ieee80211_rate_control_changed { 2847 IEEE80211_RC_BW_CHANGED = BIT(0), 2848 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2849 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2850 IEEE80211_RC_NSS_CHANGED = BIT(3), 2851 }; 2852 2853 /** 2854 * enum ieee80211_roc_type - remain on channel type 2855 * 2856 * With the support for multi channel contexts and multi channel operations, 2857 * remain on channel operations might be limited/deferred/aborted by other 2858 * flows/operations which have higher priority (and vise versa). 2859 * Specifying the ROC type can be used by devices to prioritize the ROC 2860 * operations compared to other operations/flows. 2861 * 2862 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2863 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2864 * for sending managment frames offchannel. 2865 */ 2866 enum ieee80211_roc_type { 2867 IEEE80211_ROC_TYPE_NORMAL = 0, 2868 IEEE80211_ROC_TYPE_MGMT_TX, 2869 }; 2870 2871 /** 2872 * enum ieee80211_reconfig_complete_type - reconfig type 2873 * 2874 * This enum is used by the reconfig_complete() callback to indicate what 2875 * reconfiguration type was completed. 2876 * 2877 * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type 2878 * (also due to resume() callback returning 1) 2879 * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless 2880 * of wowlan configuration) 2881 */ 2882 enum ieee80211_reconfig_type { 2883 IEEE80211_RECONFIG_TYPE_RESTART, 2884 IEEE80211_RECONFIG_TYPE_SUSPEND, 2885 }; 2886 2887 /** 2888 * struct ieee80211_ops - callbacks from mac80211 to the driver 2889 * 2890 * This structure contains various callbacks that the driver may 2891 * handle or, in some cases, must handle, for example to configure 2892 * the hardware to a new channel or to transmit a frame. 2893 * 2894 * @tx: Handler that 802.11 module calls for each transmitted frame. 2895 * skb contains the buffer starting from the IEEE 802.11 header. 2896 * The low-level driver should send the frame out based on 2897 * configuration in the TX control data. This handler should, 2898 * preferably, never fail and stop queues appropriately. 2899 * Must be atomic. 2900 * 2901 * @start: Called before the first netdevice attached to the hardware 2902 * is enabled. This should turn on the hardware and must turn on 2903 * frame reception (for possibly enabled monitor interfaces.) 2904 * Returns negative error codes, these may be seen in userspace, 2905 * or zero. 2906 * When the device is started it should not have a MAC address 2907 * to avoid acknowledging frames before a non-monitor device 2908 * is added. 2909 * Must be implemented and can sleep. 2910 * 2911 * @stop: Called after last netdevice attached to the hardware 2912 * is disabled. This should turn off the hardware (at least 2913 * it must turn off frame reception.) 2914 * May be called right after add_interface if that rejects 2915 * an interface. If you added any work onto the mac80211 workqueue 2916 * you should ensure to cancel it on this callback. 2917 * Must be implemented and can sleep. 2918 * 2919 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2920 * stop transmitting and doing any other configuration, and then 2921 * ask the device to suspend. This is only invoked when WoWLAN is 2922 * configured, otherwise the device is deconfigured completely and 2923 * reconfigured at resume time. 2924 * The driver may also impose special conditions under which it 2925 * wants to use the "normal" suspend (deconfigure), say if it only 2926 * supports WoWLAN when the device is associated. In this case, it 2927 * must return 1 from this function. 2928 * 2929 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2930 * now resuming its operation, after this the device must be fully 2931 * functional again. If this returns an error, the only way out is 2932 * to also unregister the device. If it returns 1, then mac80211 2933 * will also go through the regular complete restart on resume. 2934 * 2935 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2936 * modified. The reason is that device_set_wakeup_enable() is 2937 * supposed to be called when the configuration changes, not only 2938 * in suspend(). 2939 * 2940 * @add_interface: Called when a netdevice attached to the hardware is 2941 * enabled. Because it is not called for monitor mode devices, @start 2942 * and @stop must be implemented. 2943 * The driver should perform any initialization it needs before 2944 * the device can be enabled. The initial configuration for the 2945 * interface is given in the conf parameter. 2946 * The callback may refuse to add an interface by returning a 2947 * negative error code (which will be seen in userspace.) 2948 * Must be implemented and can sleep. 2949 * 2950 * @change_interface: Called when a netdevice changes type. This callback 2951 * is optional, but only if it is supported can interface types be 2952 * switched while the interface is UP. The callback may sleep. 2953 * Note that while an interface is being switched, it will not be 2954 * found by the interface iteration callbacks. 2955 * 2956 * @remove_interface: Notifies a driver that an interface is going down. 2957 * The @stop callback is called after this if it is the last interface 2958 * and no monitor interfaces are present. 2959 * When all interfaces are removed, the MAC address in the hardware 2960 * must be cleared so the device no longer acknowledges packets, 2961 * the mac_addr member of the conf structure is, however, set to the 2962 * MAC address of the device going away. 2963 * Hence, this callback must be implemented. It can sleep. 2964 * 2965 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2966 * function to change hardware configuration, e.g., channel. 2967 * This function should never fail but returns a negative error code 2968 * if it does. The callback can sleep. 2969 * 2970 * @bss_info_changed: Handler for configuration requests related to BSS 2971 * parameters that may vary during BSS's lifespan, and may affect low 2972 * level driver (e.g. assoc/disassoc status, erp parameters). 2973 * This function should not be used if no BSS has been set, unless 2974 * for association indication. The @changed parameter indicates which 2975 * of the bss parameters has changed when a call is made. The callback 2976 * can sleep. 2977 * 2978 * @prepare_multicast: Prepare for multicast filter configuration. 2979 * This callback is optional, and its return value is passed 2980 * to configure_filter(). This callback must be atomic. 2981 * 2982 * @configure_filter: Configure the device's RX filter. 2983 * See the section "Frame filtering" for more information. 2984 * This callback must be implemented and can sleep. 2985 * 2986 * @config_iface_filter: Configure the interface's RX filter. 2987 * This callback is optional and is used to configure which frames 2988 * should be passed to mac80211. The filter_flags is the combination 2989 * of FIF_* flags. The changed_flags is a bit mask that indicates 2990 * which flags are changed. 2991 * This callback can sleep. 2992 * 2993 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2994 * must be set or cleared for a given STA. Must be atomic. 2995 * 2996 * @set_key: See the section "Hardware crypto acceleration" 2997 * This callback is only called between add_interface and 2998 * remove_interface calls, i.e. while the given virtual interface 2999 * is enabled. 3000 * Returns a negative error code if the key can't be added. 3001 * The callback can sleep. 3002 * 3003 * @update_tkip_key: See the section "Hardware crypto acceleration" 3004 * This callback will be called in the context of Rx. Called for drivers 3005 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 3006 * The callback must be atomic. 3007 * 3008 * @set_rekey_data: If the device supports GTK rekeying, for example while the 3009 * host is suspended, it can assign this callback to retrieve the data 3010 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 3011 * After rekeying was done it should (for example during resume) notify 3012 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 3013 * 3014 * @set_default_unicast_key: Set the default (unicast) key index, useful for 3015 * WEP when the device sends data packets autonomously, e.g. for ARP 3016 * offloading. The index can be 0-3, or -1 for unsetting it. 3017 * 3018 * @hw_scan: Ask the hardware to service the scan request, no need to start 3019 * the scan state machine in stack. The scan must honour the channel 3020 * configuration done by the regulatory agent in the wiphy's 3021 * registered bands. The hardware (or the driver) needs to make sure 3022 * that power save is disabled. 3023 * The @req ie/ie_len members are rewritten by mac80211 to contain the 3024 * entire IEs after the SSID, so that drivers need not look at these 3025 * at all but just send them after the SSID -- mac80211 includes the 3026 * (extended) supported rates and HT information (where applicable). 3027 * When the scan finishes, ieee80211_scan_completed() must be called; 3028 * note that it also must be called when the scan cannot finish due to 3029 * any error unless this callback returned a negative error code. 3030 * The callback can sleep. 3031 * 3032 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 3033 * The driver should ask the hardware to cancel the scan (if possible), 3034 * but the scan will be completed only after the driver will call 3035 * ieee80211_scan_completed(). 3036 * This callback is needed for wowlan, to prevent enqueueing a new 3037 * scan_work after the low-level driver was already suspended. 3038 * The callback can sleep. 3039 * 3040 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 3041 * specific intervals. The driver must call the 3042 * ieee80211_sched_scan_results() function whenever it finds results. 3043 * This process will continue until sched_scan_stop is called. 3044 * 3045 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 3046 * In this case, ieee80211_sched_scan_stopped() must not be called. 3047 * 3048 * @sw_scan_start: Notifier function that is called just before a software scan 3049 * is started. Can be NULL, if the driver doesn't need this notification. 3050 * The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR, 3051 * the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it 3052 * can use this parameter. The callback can sleep. 3053 * 3054 * @sw_scan_complete: Notifier function that is called just after a 3055 * software scan finished. Can be NULL, if the driver doesn't need 3056 * this notification. 3057 * The callback can sleep. 3058 * 3059 * @get_stats: Return low-level statistics. 3060 * Returns zero if statistics are available. 3061 * The callback can sleep. 3062 * 3063 * @get_key_seq: If your device implements encryption in hardware and does 3064 * IV/PN assignment then this callback should be provided to read the 3065 * IV/PN for the given key from hardware. 3066 * The callback must be atomic. 3067 * 3068 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 3069 * if the device does fragmentation by itself; if this callback is 3070 * implemented then the stack will not do fragmentation. 3071 * The callback can sleep. 3072 * 3073 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 3074 * The callback can sleep. 3075 * 3076 * @sta_add: Notifies low level driver about addition of an associated station, 3077 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 3078 * 3079 * @sta_remove: Notifies low level driver about removal of an associated 3080 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 3081 * returns it isn't safe to use the pointer, not even RCU protected; 3082 * no RCU grace period is guaranteed between returning here and freeing 3083 * the station. See @sta_pre_rcu_remove if needed. 3084 * This callback can sleep. 3085 * 3086 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 3087 * when a station is added to mac80211's station list. This callback 3088 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 3089 * conditional. This callback can sleep. 3090 * 3091 * @sta_remove_debugfs: Remove the debugfs files which were added using 3092 * @sta_add_debugfs. This callback can sleep. 3093 * 3094 * @sta_notify: Notifies low level driver about power state transition of an 3095 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 3096 * in AP mode, this callback will not be called when the flag 3097 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 3098 * 3099 * @sta_state: Notifies low level driver about state transition of a 3100 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 3101 * This callback is mutually exclusive with @sta_add/@sta_remove. 3102 * It must not fail for down transitions but may fail for transitions 3103 * up the list of states. Also note that after the callback returns it 3104 * isn't safe to use the pointer, not even RCU protected - no RCU grace 3105 * period is guaranteed between returning here and freeing the station. 3106 * See @sta_pre_rcu_remove if needed. 3107 * The callback can sleep. 3108 * 3109 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 3110 * synchronisation. This is useful if a driver needs to have station 3111 * pointers protected using RCU, it can then use this call to clear 3112 * the pointers instead of waiting for an RCU grace period to elapse 3113 * in @sta_state. 3114 * The callback can sleep. 3115 * 3116 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 3117 * used to transmit to the station. The changes are advertised with bits 3118 * from &enum ieee80211_rate_control_changed and the values are reflected 3119 * in the station data. This callback should only be used when the driver 3120 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 3121 * otherwise the rate control algorithm is notified directly. 3122 * Must be atomic. 3123 * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This 3124 * is only used if the configured rate control algorithm actually uses 3125 * the new rate table API, and is therefore optional. Must be atomic. 3126 * 3127 * @sta_statistics: Get statistics for this station. For example with beacon 3128 * filtering, the statistics kept by mac80211 might not be accurate, so 3129 * let the driver pre-fill the statistics. The driver can fill most of 3130 * the values (indicating which by setting the filled bitmap), but not 3131 * all of them make sense - see the source for which ones are possible. 3132 * Statistics that the driver doesn't fill will be filled by mac80211. 3133 * The callback can sleep. 3134 * 3135 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 3136 * bursting) for a hardware TX queue. 3137 * Returns a negative error code on failure. 3138 * The callback can sleep. 3139 * 3140 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 3141 * this is only used for IBSS mode BSSID merging and debugging. Is not a 3142 * required function. 3143 * The callback can sleep. 3144 * 3145 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 3146 * Currently, this is only used for IBSS mode debugging. Is not a 3147 * required function. 3148 * The callback can sleep. 3149 * 3150 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 3151 * with other STAs in the IBSS. This is only used in IBSS mode. This 3152 * function is optional if the firmware/hardware takes full care of 3153 * TSF synchronization. 3154 * The callback can sleep. 3155 * 3156 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 3157 * This is needed only for IBSS mode and the result of this function is 3158 * used to determine whether to reply to Probe Requests. 3159 * Returns non-zero if this device sent the last beacon. 3160 * The callback can sleep. 3161 * 3162 * @ampdu_action: Perform a certain A-MPDU action 3163 * The RA/TID combination determines the destination and TID we want 3164 * the ampdu action to be performed for. The action is defined through 3165 * ieee80211_ampdu_mlme_action. 3166 * When the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL the driver 3167 * may neither send aggregates containing more subframes than @buf_size 3168 * nor send aggregates in a way that lost frames would exceed the 3169 * buffer size. If just limiting the aggregate size, this would be 3170 * possible with a buf_size of 8: 3171 * - TX: 1.....7 3172 * - RX: 2....7 (lost frame #1) 3173 * - TX: 8..1... 3174 * which is invalid since #1 was now re-transmitted well past the 3175 * buffer size of 8. Correct ways to retransmit #1 would be: 3176 * - TX: 1 or 18 or 81 3177 * Even "189" would be wrong since 1 could be lost again. 3178 * 3179 * Returns a negative error code on failure. 3180 * The callback can sleep. 3181 * 3182 * @get_survey: Return per-channel survey information 3183 * 3184 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 3185 * need to set wiphy->rfkill_poll to %true before registration, 3186 * and need to call wiphy_rfkill_set_hw_state() in the callback. 3187 * The callback can sleep. 3188 * 3189 * @set_coverage_class: Set slot time for given coverage class as specified 3190 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 3191 * accordingly; coverage class equals to -1 to enable ACK timeout 3192 * estimation algorithm (dynack). To disable dynack set valid value for 3193 * coverage class. This callback is not required and may sleep. 3194 * 3195 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 3196 * be %NULL. The callback can sleep. 3197 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 3198 * 3199 * @flush: Flush all pending frames from the hardware queue, making sure 3200 * that the hardware queues are empty. The @queues parameter is a bitmap 3201 * of queues to flush, which is useful if different virtual interfaces 3202 * use different hardware queues; it may also indicate all queues. 3203 * If the parameter @drop is set to %true, pending frames may be dropped. 3204 * Note that vif can be NULL. 3205 * The callback can sleep. 3206 * 3207 * @channel_switch: Drivers that need (or want) to offload the channel 3208 * switch operation for CSAs received from the AP may implement this 3209 * callback. They must then call ieee80211_chswitch_done() to indicate 3210 * completion of the channel switch. 3211 * 3212 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 3213 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 3214 * reject TX/RX mask combinations they cannot support by returning -EINVAL 3215 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 3216 * 3217 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 3218 * 3219 * @remain_on_channel: Starts an off-channel period on the given channel, must 3220 * call back to ieee80211_ready_on_channel() when on that channel. Note 3221 * that normal channel traffic is not stopped as this is intended for hw 3222 * offload. Frames to transmit on the off-channel channel are transmitted 3223 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 3224 * duration (which will always be non-zero) expires, the driver must call 3225 * ieee80211_remain_on_channel_expired(). 3226 * Note that this callback may be called while the device is in IDLE and 3227 * must be accepted in this case. 3228 * This callback may sleep. 3229 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 3230 * aborted before it expires. This callback may sleep. 3231 * 3232 * @set_ringparam: Set tx and rx ring sizes. 3233 * 3234 * @get_ringparam: Get tx and rx ring current and maximum sizes. 3235 * 3236 * @tx_frames_pending: Check if there is any pending frame in the hardware 3237 * queues before entering power save. 3238 * 3239 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 3240 * when transmitting a frame. Currently only legacy rates are handled. 3241 * The callback can sleep. 3242 * @event_callback: Notify driver about any event in mac80211. See 3243 * &enum ieee80211_event_type for the different types. 3244 * The callback must be atomic. 3245 * 3246 * @release_buffered_frames: Release buffered frames according to the given 3247 * parameters. In the case where the driver buffers some frames for 3248 * sleeping stations mac80211 will use this callback to tell the driver 3249 * to release some frames, either for PS-poll or uAPSD. 3250 * Note that if the @more_data parameter is %false the driver must check 3251 * if there are more frames on the given TIDs, and if there are more than 3252 * the frames being released then it must still set the more-data bit in 3253 * the frame. If the @more_data parameter is %true, then of course the 3254 * more-data bit must always be set. 3255 * The @tids parameter tells the driver which TIDs to release frames 3256 * from, for PS-poll it will always have only a single bit set. 3257 * In the case this is used for a PS-poll initiated release, the 3258 * @num_frames parameter will always be 1 so code can be shared. In 3259 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 3260 * on the TX status (and must report TX status) so that the PS-poll 3261 * period is properly ended. This is used to avoid sending multiple 3262 * responses for a retried PS-poll frame. 3263 * In the case this is used for uAPSD, the @num_frames parameter may be 3264 * bigger than one, but the driver may send fewer frames (it must send 3265 * at least one, however). In this case it is also responsible for 3266 * setting the EOSP flag in the QoS header of the frames. Also, when the 3267 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 3268 * on the last frame in the SP. Alternatively, it may call the function 3269 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 3270 * This callback must be atomic. 3271 * @allow_buffered_frames: Prepare device to allow the given number of frames 3272 * to go out to the given station. The frames will be sent by mac80211 3273 * via the usual TX path after this call. The TX information for frames 3274 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 3275 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 3276 * frames from multiple TIDs are released and the driver might reorder 3277 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 3278 * on the last frame and clear it on all others and also handle the EOSP 3279 * bit in the QoS header correctly. Alternatively, it can also call the 3280 * ieee80211_sta_eosp() function. 3281 * The @tids parameter is a bitmap and tells the driver which TIDs the 3282 * frames will be on; it will at most have two bits set. 3283 * This callback must be atomic. 3284 * 3285 * @get_et_sset_count: Ethtool API to get string-set count. 3286 * 3287 * @get_et_stats: Ethtool API to get a set of u64 stats. 3288 * 3289 * @get_et_strings: Ethtool API to get a set of strings to describe stats 3290 * and perhaps other supported types of ethtool data-sets. 3291 * 3292 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 3293 * before associated. In multi-channel scenarios, a virtual interface is 3294 * bound to a channel before it is associated, but as it isn't associated 3295 * yet it need not necessarily be given airtime, in particular since any 3296 * transmission to a P2P GO needs to be synchronized against the GO's 3297 * powersave state. mac80211 will call this function before transmitting a 3298 * management frame prior to having successfully associated to allow the 3299 * driver to give it channel time for the transmission, to get a response 3300 * and to be able to synchronize with the GO. 3301 * The callback will be called before each transmission and upon return 3302 * mac80211 will transmit the frame right away. 3303 * The callback is optional and can (should!) sleep. 3304 * 3305 * @mgd_protect_tdls_discover: Protect a TDLS discovery session. After sending 3306 * a TDLS discovery-request, we expect a reply to arrive on the AP's 3307 * channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS 3308 * setup-response is a direct packet not buffered by the AP. 3309 * mac80211 will call this function just before the transmission of a TDLS 3310 * discovery-request. The recommended period of protection is at least 3311 * 2 * (DTIM period). 3312 * The callback is optional and can sleep. 3313 * 3314 * @add_chanctx: Notifies device driver about new channel context creation. 3315 * This callback may sleep. 3316 * @remove_chanctx: Notifies device driver about channel context destruction. 3317 * This callback may sleep. 3318 * @change_chanctx: Notifies device driver about channel context changes that 3319 * may happen when combining different virtual interfaces on the same 3320 * channel context with different settings 3321 * This callback may sleep. 3322 * @assign_vif_chanctx: Notifies device driver about channel context being bound 3323 * to vif. Possible use is for hw queue remapping. 3324 * This callback may sleep. 3325 * @unassign_vif_chanctx: Notifies device driver about channel context being 3326 * unbound from vif. 3327 * This callback may sleep. 3328 * @switch_vif_chanctx: switch a number of vifs from one chanctx to 3329 * another, as specified in the list of 3330 * @ieee80211_vif_chanctx_switch passed to the driver, according 3331 * to the mode defined in &ieee80211_chanctx_switch_mode. 3332 * This callback may sleep. 3333 * 3334 * @start_ap: Start operation on the AP interface, this is called after all the 3335 * information in bss_conf is set and beacon can be retrieved. A channel 3336 * context is bound before this is called. Note that if the driver uses 3337 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 3338 * just "paused" for scanning/ROC, which is indicated by the beacon being 3339 * disabled/enabled via @bss_info_changed. 3340 * @stop_ap: Stop operation on the AP interface. 3341 * 3342 * @reconfig_complete: Called after a call to ieee80211_restart_hw() and 3343 * during resume, when the reconfiguration has completed. 3344 * This can help the driver implement the reconfiguration step (and 3345 * indicate mac80211 is ready to receive frames). 3346 * This callback may sleep. 3347 * 3348 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 3349 * Currently, this is only called for managed or P2P client interfaces. 3350 * This callback is optional; it must not sleep. 3351 * 3352 * @channel_switch_beacon: Starts a channel switch to a new channel. 3353 * Beacons are modified to include CSA or ECSA IEs before calling this 3354 * function. The corresponding count fields in these IEs must be 3355 * decremented, and when they reach 1 the driver must call 3356 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 3357 * get the csa counter decremented by mac80211, but must check if it is 3358 * 1 using ieee80211_csa_is_complete() after the beacon has been 3359 * transmitted and then call ieee80211_csa_finish(). 3360 * If the CSA count starts as zero or 1, this function will not be called, 3361 * since there won't be any time to beacon before the switch anyway. 3362 * @pre_channel_switch: This is an optional callback that is called 3363 * before a channel switch procedure is started (ie. when a STA 3364 * gets a CSA or an userspace initiated channel-switch), allowing 3365 * the driver to prepare for the channel switch. 3366 * @post_channel_switch: This is an optional callback that is called 3367 * after a channel switch procedure is completed, allowing the 3368 * driver to go back to a normal configuration. 3369 * 3370 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 3371 * information in bss_conf is set up and the beacon can be retrieved. A 3372 * channel context is bound before this is called. 3373 * @leave_ibss: Leave the IBSS again. 3374 * 3375 * @get_expected_throughput: extract the expected throughput towards the 3376 * specified station. The returned value is expressed in Kbps. It returns 0 3377 * if the RC algorithm does not have proper data to provide. 3378 * 3379 * @get_txpower: get current maximum tx power (in dBm) based on configuration 3380 * and hardware limits. 3381 * 3382 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver 3383 * is responsible for continually initiating channel-switching operations 3384 * and returning to the base channel for communication with the AP. The 3385 * driver receives a channel-switch request template and the location of 3386 * the switch-timing IE within the template as part of the invocation. 3387 * The template is valid only within the call, and the driver can 3388 * optionally copy the skb for further re-use. 3389 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both 3390 * peers must be on the base channel when the call completes. 3391 * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or 3392 * response) has been received from a remote peer. The driver gets 3393 * parameters parsed from the incoming frame and may use them to continue 3394 * an ongoing channel-switch operation. In addition, a channel-switch 3395 * response template is provided, together with the location of the 3396 * switch-timing IE within the template. The skb can only be used within 3397 * the function call. 3398 * 3399 * @wake_tx_queue: Called when new packets have been added to the queue. 3400 * @sync_rx_queues: Process all pending frames in RSS queues. This is a 3401 * synchronization which is needed in case driver has in its RSS queues 3402 * pending frames that were received prior to the control path action 3403 * currently taken (e.g. disassociation) but are not processed yet. 3404 */ 3405 struct ieee80211_ops { 3406 void (*tx)(struct ieee80211_hw *hw, 3407 struct ieee80211_tx_control *control, 3408 struct sk_buff *skb); 3409 int (*start)(struct ieee80211_hw *hw); 3410 void (*stop)(struct ieee80211_hw *hw); 3411 #ifdef CONFIG_PM 3412 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 3413 int (*resume)(struct ieee80211_hw *hw); 3414 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 3415 #endif 3416 int (*add_interface)(struct ieee80211_hw *hw, 3417 struct ieee80211_vif *vif); 3418 int (*change_interface)(struct ieee80211_hw *hw, 3419 struct ieee80211_vif *vif, 3420 enum nl80211_iftype new_type, bool p2p); 3421 void (*remove_interface)(struct ieee80211_hw *hw, 3422 struct ieee80211_vif *vif); 3423 int (*config)(struct ieee80211_hw *hw, u32 changed); 3424 void (*bss_info_changed)(struct ieee80211_hw *hw, 3425 struct ieee80211_vif *vif, 3426 struct ieee80211_bss_conf *info, 3427 u32 changed); 3428 3429 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3430 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3431 3432 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 3433 struct netdev_hw_addr_list *mc_list); 3434 void (*configure_filter)(struct ieee80211_hw *hw, 3435 unsigned int changed_flags, 3436 unsigned int *total_flags, 3437 u64 multicast); 3438 void (*config_iface_filter)(struct ieee80211_hw *hw, 3439 struct ieee80211_vif *vif, 3440 unsigned int filter_flags, 3441 unsigned int changed_flags); 3442 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3443 bool set); 3444 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 3445 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 3446 struct ieee80211_key_conf *key); 3447 void (*update_tkip_key)(struct ieee80211_hw *hw, 3448 struct ieee80211_vif *vif, 3449 struct ieee80211_key_conf *conf, 3450 struct ieee80211_sta *sta, 3451 u32 iv32, u16 *phase1key); 3452 void (*set_rekey_data)(struct ieee80211_hw *hw, 3453 struct ieee80211_vif *vif, 3454 struct cfg80211_gtk_rekey_data *data); 3455 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 3456 struct ieee80211_vif *vif, int idx); 3457 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3458 struct ieee80211_scan_request *req); 3459 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 3460 struct ieee80211_vif *vif); 3461 int (*sched_scan_start)(struct ieee80211_hw *hw, 3462 struct ieee80211_vif *vif, 3463 struct cfg80211_sched_scan_request *req, 3464 struct ieee80211_scan_ies *ies); 3465 int (*sched_scan_stop)(struct ieee80211_hw *hw, 3466 struct ieee80211_vif *vif); 3467 void (*sw_scan_start)(struct ieee80211_hw *hw, 3468 struct ieee80211_vif *vif, 3469 const u8 *mac_addr); 3470 void (*sw_scan_complete)(struct ieee80211_hw *hw, 3471 struct ieee80211_vif *vif); 3472 int (*get_stats)(struct ieee80211_hw *hw, 3473 struct ieee80211_low_level_stats *stats); 3474 void (*get_key_seq)(struct ieee80211_hw *hw, 3475 struct ieee80211_key_conf *key, 3476 struct ieee80211_key_seq *seq); 3477 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 3478 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 3479 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3480 struct ieee80211_sta *sta); 3481 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3482 struct ieee80211_sta *sta); 3483 #ifdef CONFIG_MAC80211_DEBUGFS 3484 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 3485 struct ieee80211_vif *vif, 3486 struct ieee80211_sta *sta, 3487 struct dentry *dir); 3488 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 3489 struct ieee80211_vif *vif, 3490 struct ieee80211_sta *sta, 3491 struct dentry *dir); 3492 #endif 3493 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3494 enum sta_notify_cmd, struct ieee80211_sta *sta); 3495 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3496 struct ieee80211_sta *sta, 3497 enum ieee80211_sta_state old_state, 3498 enum ieee80211_sta_state new_state); 3499 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 3500 struct ieee80211_vif *vif, 3501 struct ieee80211_sta *sta); 3502 void (*sta_rc_update)(struct ieee80211_hw *hw, 3503 struct ieee80211_vif *vif, 3504 struct ieee80211_sta *sta, 3505 u32 changed); 3506 void (*sta_rate_tbl_update)(struct ieee80211_hw *hw, 3507 struct ieee80211_vif *vif, 3508 struct ieee80211_sta *sta); 3509 void (*sta_statistics)(struct ieee80211_hw *hw, 3510 struct ieee80211_vif *vif, 3511 struct ieee80211_sta *sta, 3512 struct station_info *sinfo); 3513 int (*conf_tx)(struct ieee80211_hw *hw, 3514 struct ieee80211_vif *vif, u16 ac, 3515 const struct ieee80211_tx_queue_params *params); 3516 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3517 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3518 u64 tsf); 3519 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3520 int (*tx_last_beacon)(struct ieee80211_hw *hw); 3521 int (*ampdu_action)(struct ieee80211_hw *hw, 3522 struct ieee80211_vif *vif, 3523 struct ieee80211_ampdu_params *params); 3524 int (*get_survey)(struct ieee80211_hw *hw, int idx, 3525 struct survey_info *survey); 3526 void (*rfkill_poll)(struct ieee80211_hw *hw); 3527 void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class); 3528 #ifdef CONFIG_NL80211_TESTMODE 3529 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3530 void *data, int len); 3531 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 3532 struct netlink_callback *cb, 3533 void *data, int len); 3534 #endif 3535 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3536 u32 queues, bool drop); 3537 void (*channel_switch)(struct ieee80211_hw *hw, 3538 struct ieee80211_vif *vif, 3539 struct ieee80211_channel_switch *ch_switch); 3540 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 3541 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 3542 3543 int (*remain_on_channel)(struct ieee80211_hw *hw, 3544 struct ieee80211_vif *vif, 3545 struct ieee80211_channel *chan, 3546 int duration, 3547 enum ieee80211_roc_type type); 3548 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 3549 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 3550 void (*get_ringparam)(struct ieee80211_hw *hw, 3551 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 3552 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 3553 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3554 const struct cfg80211_bitrate_mask *mask); 3555 void (*event_callback)(struct ieee80211_hw *hw, 3556 struct ieee80211_vif *vif, 3557 const struct ieee80211_event *event); 3558 3559 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 3560 struct ieee80211_sta *sta, 3561 u16 tids, int num_frames, 3562 enum ieee80211_frame_release_type reason, 3563 bool more_data); 3564 void (*release_buffered_frames)(struct ieee80211_hw *hw, 3565 struct ieee80211_sta *sta, 3566 u16 tids, int num_frames, 3567 enum ieee80211_frame_release_type reason, 3568 bool more_data); 3569 3570 int (*get_et_sset_count)(struct ieee80211_hw *hw, 3571 struct ieee80211_vif *vif, int sset); 3572 void (*get_et_stats)(struct ieee80211_hw *hw, 3573 struct ieee80211_vif *vif, 3574 struct ethtool_stats *stats, u64 *data); 3575 void (*get_et_strings)(struct ieee80211_hw *hw, 3576 struct ieee80211_vif *vif, 3577 u32 sset, u8 *data); 3578 3579 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 3580 struct ieee80211_vif *vif); 3581 3582 void (*mgd_protect_tdls_discover)(struct ieee80211_hw *hw, 3583 struct ieee80211_vif *vif); 3584 3585 int (*add_chanctx)(struct ieee80211_hw *hw, 3586 struct ieee80211_chanctx_conf *ctx); 3587 void (*remove_chanctx)(struct ieee80211_hw *hw, 3588 struct ieee80211_chanctx_conf *ctx); 3589 void (*change_chanctx)(struct ieee80211_hw *hw, 3590 struct ieee80211_chanctx_conf *ctx, 3591 u32 changed); 3592 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 3593 struct ieee80211_vif *vif, 3594 struct ieee80211_chanctx_conf *ctx); 3595 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 3596 struct ieee80211_vif *vif, 3597 struct ieee80211_chanctx_conf *ctx); 3598 int (*switch_vif_chanctx)(struct ieee80211_hw *hw, 3599 struct ieee80211_vif_chanctx_switch *vifs, 3600 int n_vifs, 3601 enum ieee80211_chanctx_switch_mode mode); 3602 3603 void (*reconfig_complete)(struct ieee80211_hw *hw, 3604 enum ieee80211_reconfig_type reconfig_type); 3605 3606 #if IS_ENABLED(CONFIG_IPV6) 3607 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 3608 struct ieee80211_vif *vif, 3609 struct inet6_dev *idev); 3610 #endif 3611 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 3612 struct ieee80211_vif *vif, 3613 struct cfg80211_chan_def *chandef); 3614 int (*pre_channel_switch)(struct ieee80211_hw *hw, 3615 struct ieee80211_vif *vif, 3616 struct ieee80211_channel_switch *ch_switch); 3617 3618 int (*post_channel_switch)(struct ieee80211_hw *hw, 3619 struct ieee80211_vif *vif); 3620 3621 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3622 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3623 u32 (*get_expected_throughput)(struct ieee80211_sta *sta); 3624 int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3625 int *dbm); 3626 3627 int (*tdls_channel_switch)(struct ieee80211_hw *hw, 3628 struct ieee80211_vif *vif, 3629 struct ieee80211_sta *sta, u8 oper_class, 3630 struct cfg80211_chan_def *chandef, 3631 struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie); 3632 void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw, 3633 struct ieee80211_vif *vif, 3634 struct ieee80211_sta *sta); 3635 void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw, 3636 struct ieee80211_vif *vif, 3637 struct ieee80211_tdls_ch_sw_params *params); 3638 3639 void (*wake_tx_queue)(struct ieee80211_hw *hw, 3640 struct ieee80211_txq *txq); 3641 void (*sync_rx_queues)(struct ieee80211_hw *hw); 3642 }; 3643 3644 /** 3645 * ieee80211_alloc_hw_nm - Allocate a new hardware device 3646 * 3647 * This must be called once for each hardware device. The returned pointer 3648 * must be used to refer to this device when calling other functions. 3649 * mac80211 allocates a private data area for the driver pointed to by 3650 * @priv in &struct ieee80211_hw, the size of this area is given as 3651 * @priv_data_len. 3652 * 3653 * @priv_data_len: length of private data 3654 * @ops: callbacks for this device 3655 * @requested_name: Requested name for this device. 3656 * NULL is valid value, and means use the default naming (phy%d) 3657 * 3658 * Return: A pointer to the new hardware device, or %NULL on error. 3659 */ 3660 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 3661 const struct ieee80211_ops *ops, 3662 const char *requested_name); 3663 3664 /** 3665 * ieee80211_alloc_hw - Allocate a new hardware device 3666 * 3667 * This must be called once for each hardware device. The returned pointer 3668 * must be used to refer to this device when calling other functions. 3669 * mac80211 allocates a private data area for the driver pointed to by 3670 * @priv in &struct ieee80211_hw, the size of this area is given as 3671 * @priv_data_len. 3672 * 3673 * @priv_data_len: length of private data 3674 * @ops: callbacks for this device 3675 * 3676 * Return: A pointer to the new hardware device, or %NULL on error. 3677 */ 3678 static inline 3679 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 3680 const struct ieee80211_ops *ops) 3681 { 3682 return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL); 3683 } 3684 3685 /** 3686 * ieee80211_register_hw - Register hardware device 3687 * 3688 * You must call this function before any other functions in 3689 * mac80211. Note that before a hardware can be registered, you 3690 * need to fill the contained wiphy's information. 3691 * 3692 * @hw: the device to register as returned by ieee80211_alloc_hw() 3693 * 3694 * Return: 0 on success. An error code otherwise. 3695 */ 3696 int ieee80211_register_hw(struct ieee80211_hw *hw); 3697 3698 /** 3699 * struct ieee80211_tpt_blink - throughput blink description 3700 * @throughput: throughput in Kbit/sec 3701 * @blink_time: blink time in milliseconds 3702 * (full cycle, ie. one off + one on period) 3703 */ 3704 struct ieee80211_tpt_blink { 3705 int throughput; 3706 int blink_time; 3707 }; 3708 3709 /** 3710 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3711 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3712 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3713 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3714 * interface is connected in some way, including being an AP 3715 */ 3716 enum ieee80211_tpt_led_trigger_flags { 3717 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3718 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3719 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3720 }; 3721 3722 #ifdef CONFIG_MAC80211_LEDS 3723 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3724 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3725 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3726 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3727 const char * 3728 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3729 unsigned int flags, 3730 const struct ieee80211_tpt_blink *blink_table, 3731 unsigned int blink_table_len); 3732 #endif 3733 /** 3734 * ieee80211_get_tx_led_name - get name of TX LED 3735 * 3736 * mac80211 creates a transmit LED trigger for each wireless hardware 3737 * that can be used to drive LEDs if your driver registers a LED device. 3738 * This function returns the name (or %NULL if not configured for LEDs) 3739 * of the trigger so you can automatically link the LED device. 3740 * 3741 * @hw: the hardware to get the LED trigger name for 3742 * 3743 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3744 */ 3745 static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3746 { 3747 #ifdef CONFIG_MAC80211_LEDS 3748 return __ieee80211_get_tx_led_name(hw); 3749 #else 3750 return NULL; 3751 #endif 3752 } 3753 3754 /** 3755 * ieee80211_get_rx_led_name - get name of RX LED 3756 * 3757 * mac80211 creates a receive LED trigger for each wireless hardware 3758 * that can be used to drive LEDs if your driver registers a LED device. 3759 * This function returns the name (or %NULL if not configured for LEDs) 3760 * of the trigger so you can automatically link the LED device. 3761 * 3762 * @hw: the hardware to get the LED trigger name for 3763 * 3764 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3765 */ 3766 static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3767 { 3768 #ifdef CONFIG_MAC80211_LEDS 3769 return __ieee80211_get_rx_led_name(hw); 3770 #else 3771 return NULL; 3772 #endif 3773 } 3774 3775 /** 3776 * ieee80211_get_assoc_led_name - get name of association LED 3777 * 3778 * mac80211 creates a association LED trigger for each wireless hardware 3779 * that can be used to drive LEDs if your driver registers a LED device. 3780 * This function returns the name (or %NULL if not configured for LEDs) 3781 * of the trigger so you can automatically link the LED device. 3782 * 3783 * @hw: the hardware to get the LED trigger name for 3784 * 3785 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3786 */ 3787 static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3788 { 3789 #ifdef CONFIG_MAC80211_LEDS 3790 return __ieee80211_get_assoc_led_name(hw); 3791 #else 3792 return NULL; 3793 #endif 3794 } 3795 3796 /** 3797 * ieee80211_get_radio_led_name - get name of radio LED 3798 * 3799 * mac80211 creates a radio change LED trigger for each wireless hardware 3800 * that can be used to drive LEDs if your driver registers a LED device. 3801 * This function returns the name (or %NULL if not configured for LEDs) 3802 * of the trigger so you can automatically link the LED device. 3803 * 3804 * @hw: the hardware to get the LED trigger name for 3805 * 3806 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3807 */ 3808 static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3809 { 3810 #ifdef CONFIG_MAC80211_LEDS 3811 return __ieee80211_get_radio_led_name(hw); 3812 #else 3813 return NULL; 3814 #endif 3815 } 3816 3817 /** 3818 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3819 * @hw: the hardware to create the trigger for 3820 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3821 * @blink_table: the blink table -- needs to be ordered by throughput 3822 * @blink_table_len: size of the blink table 3823 * 3824 * Return: %NULL (in case of error, or if no LED triggers are 3825 * configured) or the name of the new trigger. 3826 * 3827 * Note: This function must be called before ieee80211_register_hw(). 3828 */ 3829 static inline const char * 3830 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3831 const struct ieee80211_tpt_blink *blink_table, 3832 unsigned int blink_table_len) 3833 { 3834 #ifdef CONFIG_MAC80211_LEDS 3835 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3836 blink_table_len); 3837 #else 3838 return NULL; 3839 #endif 3840 } 3841 3842 /** 3843 * ieee80211_unregister_hw - Unregister a hardware device 3844 * 3845 * This function instructs mac80211 to free allocated resources 3846 * and unregister netdevices from the networking subsystem. 3847 * 3848 * @hw: the hardware to unregister 3849 */ 3850 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3851 3852 /** 3853 * ieee80211_free_hw - free hardware descriptor 3854 * 3855 * This function frees everything that was allocated, including the 3856 * private data for the driver. You must call ieee80211_unregister_hw() 3857 * before calling this function. 3858 * 3859 * @hw: the hardware to free 3860 */ 3861 void ieee80211_free_hw(struct ieee80211_hw *hw); 3862 3863 /** 3864 * ieee80211_restart_hw - restart hardware completely 3865 * 3866 * Call this function when the hardware was restarted for some reason 3867 * (hardware error, ...) and the driver is unable to restore its state 3868 * by itself. mac80211 assumes that at this point the driver/hardware 3869 * is completely uninitialised and stopped, it starts the process by 3870 * calling the ->start() operation. The driver will need to reset all 3871 * internal state that it has prior to calling this function. 3872 * 3873 * @hw: the hardware to restart 3874 */ 3875 void ieee80211_restart_hw(struct ieee80211_hw *hw); 3876 3877 /** 3878 * ieee80211_rx_napi - receive frame from NAPI context 3879 * 3880 * Use this function to hand received frames to mac80211. The receive 3881 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3882 * paged @skb is used, the driver is recommended to put the ieee80211 3883 * header of the frame on the linear part of the @skb to avoid memory 3884 * allocation and/or memcpy by the stack. 3885 * 3886 * This function may not be called in IRQ context. Calls to this function 3887 * for a single hardware must be synchronized against each other. Calls to 3888 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3889 * mixed for a single hardware. Must not run concurrently with 3890 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3891 * 3892 * This function must be called with BHs disabled. 3893 * 3894 * @hw: the hardware this frame came in on 3895 * @sta: the station the frame was received from, or %NULL 3896 * @skb: the buffer to receive, owned by mac80211 after this call 3897 * @napi: the NAPI context 3898 */ 3899 void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3900 struct sk_buff *skb, struct napi_struct *napi); 3901 3902 /** 3903 * ieee80211_rx - receive frame 3904 * 3905 * Use this function to hand received frames to mac80211. The receive 3906 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3907 * paged @skb is used, the driver is recommended to put the ieee80211 3908 * header of the frame on the linear part of the @skb to avoid memory 3909 * allocation and/or memcpy by the stack. 3910 * 3911 * This function may not be called in IRQ context. Calls to this function 3912 * for a single hardware must be synchronized against each other. Calls to 3913 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3914 * mixed for a single hardware. Must not run concurrently with 3915 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3916 * 3917 * In process context use instead ieee80211_rx_ni(). 3918 * 3919 * @hw: the hardware this frame came in on 3920 * @skb: the buffer to receive, owned by mac80211 after this call 3921 */ 3922 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) 3923 { 3924 ieee80211_rx_napi(hw, NULL, skb, NULL); 3925 } 3926 3927 /** 3928 * ieee80211_rx_irqsafe - receive frame 3929 * 3930 * Like ieee80211_rx() but can be called in IRQ context 3931 * (internally defers to a tasklet.) 3932 * 3933 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3934 * be mixed for a single hardware.Must not run concurrently with 3935 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3936 * 3937 * @hw: the hardware this frame came in on 3938 * @skb: the buffer to receive, owned by mac80211 after this call 3939 */ 3940 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3941 3942 /** 3943 * ieee80211_rx_ni - receive frame (in process context) 3944 * 3945 * Like ieee80211_rx() but can be called in process context 3946 * (internally disables bottom halves). 3947 * 3948 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3949 * not be mixed for a single hardware. Must not run concurrently with 3950 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3951 * 3952 * @hw: the hardware this frame came in on 3953 * @skb: the buffer to receive, owned by mac80211 after this call 3954 */ 3955 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3956 struct sk_buff *skb) 3957 { 3958 local_bh_disable(); 3959 ieee80211_rx(hw, skb); 3960 local_bh_enable(); 3961 } 3962 3963 /** 3964 * ieee80211_sta_ps_transition - PS transition for connected sta 3965 * 3966 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3967 * flag set, use this function to inform mac80211 about a connected station 3968 * entering/leaving PS mode. 3969 * 3970 * This function may not be called in IRQ context or with softirqs enabled. 3971 * 3972 * Calls to this function for a single hardware must be synchronized against 3973 * each other. 3974 * 3975 * @sta: currently connected sta 3976 * @start: start or stop PS 3977 * 3978 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3979 */ 3980 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3981 3982 /** 3983 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3984 * (in process context) 3985 * 3986 * Like ieee80211_sta_ps_transition() but can be called in process context 3987 * (internally disables bottom halves). Concurrent call restriction still 3988 * applies. 3989 * 3990 * @sta: currently connected sta 3991 * @start: start or stop PS 3992 * 3993 * Return: Like ieee80211_sta_ps_transition(). 3994 */ 3995 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3996 bool start) 3997 { 3998 int ret; 3999 4000 local_bh_disable(); 4001 ret = ieee80211_sta_ps_transition(sta, start); 4002 local_bh_enable(); 4003 4004 return ret; 4005 } 4006 4007 /** 4008 * ieee80211_sta_pspoll - PS-Poll frame received 4009 * @sta: currently connected station 4010 * 4011 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4012 * use this function to inform mac80211 that a PS-Poll frame from a 4013 * connected station was received. 4014 * This must be used in conjunction with ieee80211_sta_ps_transition() 4015 * and possibly ieee80211_sta_uapsd_trigger(); calls to all three must 4016 * be serialized. 4017 */ 4018 void ieee80211_sta_pspoll(struct ieee80211_sta *sta); 4019 4020 /** 4021 * ieee80211_sta_uapsd_trigger - (potential) U-APSD trigger frame received 4022 * @sta: currently connected station 4023 * @tid: TID of the received (potential) trigger frame 4024 * 4025 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4026 * use this function to inform mac80211 that a (potential) trigger frame 4027 * from a connected station was received. 4028 * This must be used in conjunction with ieee80211_sta_ps_transition() 4029 * and possibly ieee80211_sta_pspoll(); calls to all three must be 4030 * serialized. 4031 */ 4032 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid); 4033 4034 /* 4035 * The TX headroom reserved by mac80211 for its own tx_status functions. 4036 * This is enough for the radiotap header. 4037 */ 4038 #define IEEE80211_TX_STATUS_HEADROOM 14 4039 4040 /** 4041 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 4042 * @sta: &struct ieee80211_sta pointer for the sleeping station 4043 * @tid: the TID that has buffered frames 4044 * @buffered: indicates whether or not frames are buffered for this TID 4045 * 4046 * If a driver buffers frames for a powersave station instead of passing 4047 * them back to mac80211 for retransmission, the station may still need 4048 * to be told that there are buffered frames via the TIM bit. 4049 * 4050 * This function informs mac80211 whether or not there are frames that are 4051 * buffered in the driver for a given TID; mac80211 can then use this data 4052 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 4053 * call! Beware of the locking!) 4054 * 4055 * If all frames are released to the station (due to PS-poll or uAPSD) 4056 * then the driver needs to inform mac80211 that there no longer are 4057 * frames buffered. However, when the station wakes up mac80211 assumes 4058 * that all buffered frames will be transmitted and clears this data, 4059 * drivers need to make sure they inform mac80211 about all buffered 4060 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 4061 * 4062 * Note that technically mac80211 only needs to know this per AC, not per 4063 * TID, but since driver buffering will inevitably happen per TID (since 4064 * it is related to aggregation) it is easier to make mac80211 map the 4065 * TID to the AC as required instead of keeping track in all drivers that 4066 * use this API. 4067 */ 4068 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 4069 u8 tid, bool buffered); 4070 4071 /** 4072 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 4073 * 4074 * Call this function in a driver with per-packet rate selection support 4075 * to combine the rate info in the packet tx info with the most recent 4076 * rate selection table for the station entry. 4077 * 4078 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4079 * @sta: the receiver station to which this packet is sent. 4080 * @skb: the frame to be transmitted. 4081 * @dest: buffer for extracted rate/retry information 4082 * @max_rates: maximum number of rates to fetch 4083 */ 4084 void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 4085 struct ieee80211_sta *sta, 4086 struct sk_buff *skb, 4087 struct ieee80211_tx_rate *dest, 4088 int max_rates); 4089 4090 /** 4091 * ieee80211_tx_status - transmit status callback 4092 * 4093 * Call this function for all transmitted frames after they have been 4094 * transmitted. It is permissible to not call this function for 4095 * multicast frames but this can affect statistics. 4096 * 4097 * This function may not be called in IRQ context. Calls to this function 4098 * for a single hardware must be synchronized against each other. Calls 4099 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 4100 * may not be mixed for a single hardware. Must not run concurrently with 4101 * ieee80211_rx() or ieee80211_rx_ni(). 4102 * 4103 * @hw: the hardware the frame was transmitted by 4104 * @skb: the frame that was transmitted, owned by mac80211 after this call 4105 */ 4106 void ieee80211_tx_status(struct ieee80211_hw *hw, 4107 struct sk_buff *skb); 4108 4109 /** 4110 * ieee80211_tx_status_noskb - transmit status callback without skb 4111 * 4112 * This function can be used as a replacement for ieee80211_tx_status 4113 * in drivers that cannot reliably map tx status information back to 4114 * specific skbs. 4115 * 4116 * Calls to this function for a single hardware must be synchronized 4117 * against each other. Calls to this function, ieee80211_tx_status_ni() 4118 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware. 4119 * 4120 * @hw: the hardware the frame was transmitted by 4121 * @sta: the receiver station to which this packet is sent 4122 * (NULL for multicast packets) 4123 * @info: tx status information 4124 */ 4125 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, 4126 struct ieee80211_sta *sta, 4127 struct ieee80211_tx_info *info); 4128 4129 /** 4130 * ieee80211_tx_status_ni - transmit status callback (in process context) 4131 * 4132 * Like ieee80211_tx_status() but can be called in process context. 4133 * 4134 * Calls to this function, ieee80211_tx_status() and 4135 * ieee80211_tx_status_irqsafe() may not be mixed 4136 * for a single hardware. 4137 * 4138 * @hw: the hardware the frame was transmitted by 4139 * @skb: the frame that was transmitted, owned by mac80211 after this call 4140 */ 4141 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 4142 struct sk_buff *skb) 4143 { 4144 local_bh_disable(); 4145 ieee80211_tx_status(hw, skb); 4146 local_bh_enable(); 4147 } 4148 4149 /** 4150 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 4151 * 4152 * Like ieee80211_tx_status() but can be called in IRQ context 4153 * (internally defers to a tasklet.) 4154 * 4155 * Calls to this function, ieee80211_tx_status() and 4156 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 4157 * 4158 * @hw: the hardware the frame was transmitted by 4159 * @skb: the frame that was transmitted, owned by mac80211 after this call 4160 */ 4161 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 4162 struct sk_buff *skb); 4163 4164 /** 4165 * ieee80211_report_low_ack - report non-responding station 4166 * 4167 * When operating in AP-mode, call this function to report a non-responding 4168 * connected STA. 4169 * 4170 * @sta: the non-responding connected sta 4171 * @num_packets: number of packets sent to @sta without a response 4172 */ 4173 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 4174 4175 #define IEEE80211_MAX_CSA_COUNTERS_NUM 2 4176 4177 /** 4178 * struct ieee80211_mutable_offsets - mutable beacon offsets 4179 * @tim_offset: position of TIM element 4180 * @tim_length: size of TIM element 4181 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets 4182 * to CSA counters. This array can contain zero values which 4183 * should be ignored. 4184 */ 4185 struct ieee80211_mutable_offsets { 4186 u16 tim_offset; 4187 u16 tim_length; 4188 4189 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; 4190 }; 4191 4192 /** 4193 * ieee80211_beacon_get_template - beacon template generation function 4194 * @hw: pointer obtained from ieee80211_alloc_hw(). 4195 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4196 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will 4197 * receive the offsets that may be updated by the driver. 4198 * 4199 * If the driver implements beaconing modes, it must use this function to 4200 * obtain the beacon template. 4201 * 4202 * This function should be used if the beacon frames are generated by the 4203 * device, and then the driver must use the returned beacon as the template 4204 * The driver or the device are responsible to update the DTIM and, when 4205 * applicable, the CSA count. 4206 * 4207 * The driver is responsible for freeing the returned skb. 4208 * 4209 * Return: The beacon template. %NULL on error. 4210 */ 4211 struct sk_buff * 4212 ieee80211_beacon_get_template(struct ieee80211_hw *hw, 4213 struct ieee80211_vif *vif, 4214 struct ieee80211_mutable_offsets *offs); 4215 4216 /** 4217 * ieee80211_beacon_get_tim - beacon generation function 4218 * @hw: pointer obtained from ieee80211_alloc_hw(). 4219 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4220 * @tim_offset: pointer to variable that will receive the TIM IE offset. 4221 * Set to 0 if invalid (in non-AP modes). 4222 * @tim_length: pointer to variable that will receive the TIM IE length, 4223 * (including the ID and length bytes!). 4224 * Set to 0 if invalid (in non-AP modes). 4225 * 4226 * If the driver implements beaconing modes, it must use this function to 4227 * obtain the beacon frame. 4228 * 4229 * If the beacon frames are generated by the host system (i.e., not in 4230 * hardware/firmware), the driver uses this function to get each beacon 4231 * frame from mac80211 -- it is responsible for calling this function exactly 4232 * once before the beacon is needed (e.g. based on hardware interrupt). 4233 * 4234 * The driver is responsible for freeing the returned skb. 4235 * 4236 * Return: The beacon template. %NULL on error. 4237 */ 4238 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 4239 struct ieee80211_vif *vif, 4240 u16 *tim_offset, u16 *tim_length); 4241 4242 /** 4243 * ieee80211_beacon_get - beacon generation function 4244 * @hw: pointer obtained from ieee80211_alloc_hw(). 4245 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4246 * 4247 * See ieee80211_beacon_get_tim(). 4248 * 4249 * Return: See ieee80211_beacon_get_tim(). 4250 */ 4251 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 4252 struct ieee80211_vif *vif) 4253 { 4254 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 4255 } 4256 4257 /** 4258 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter 4259 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4260 * 4261 * The csa counter should be updated after each beacon transmission. 4262 * This function is called implicitly when 4263 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the 4264 * beacon frames are generated by the device, the driver should call this 4265 * function after each beacon transmission to sync mac80211's csa counters. 4266 * 4267 * Return: new csa counter value 4268 */ 4269 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif); 4270 4271 /** 4272 * ieee80211_csa_finish - notify mac80211 about channel switch 4273 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4274 * 4275 * After a channel switch announcement was scheduled and the counter in this 4276 * announcement hits 1, this function must be called by the driver to 4277 * notify mac80211 that the channel can be changed. 4278 */ 4279 void ieee80211_csa_finish(struct ieee80211_vif *vif); 4280 4281 /** 4282 * ieee80211_csa_is_complete - find out if counters reached 1 4283 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4284 * 4285 * This function returns whether the channel switch counters reached zero. 4286 */ 4287 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 4288 4289 4290 /** 4291 * ieee80211_proberesp_get - retrieve a Probe Response template 4292 * @hw: pointer obtained from ieee80211_alloc_hw(). 4293 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4294 * 4295 * Creates a Probe Response template which can, for example, be uploaded to 4296 * hardware. The destination address should be set by the caller. 4297 * 4298 * Can only be called in AP mode. 4299 * 4300 * Return: The Probe Response template. %NULL on error. 4301 */ 4302 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 4303 struct ieee80211_vif *vif); 4304 4305 /** 4306 * ieee80211_pspoll_get - retrieve a PS Poll template 4307 * @hw: pointer obtained from ieee80211_alloc_hw(). 4308 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4309 * 4310 * Creates a PS Poll a template which can, for example, uploaded to 4311 * hardware. The template must be updated after association so that correct 4312 * AID, BSSID and MAC address is used. 4313 * 4314 * Note: Caller (or hardware) is responsible for setting the 4315 * &IEEE80211_FCTL_PM bit. 4316 * 4317 * Return: The PS Poll template. %NULL on error. 4318 */ 4319 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 4320 struct ieee80211_vif *vif); 4321 4322 /** 4323 * ieee80211_nullfunc_get - retrieve a nullfunc template 4324 * @hw: pointer obtained from ieee80211_alloc_hw(). 4325 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4326 * 4327 * Creates a Nullfunc template which can, for example, uploaded to 4328 * hardware. The template must be updated after association so that correct 4329 * BSSID and address is used. 4330 * 4331 * Note: Caller (or hardware) is responsible for setting the 4332 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 4333 * 4334 * Return: The nullfunc template. %NULL on error. 4335 */ 4336 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 4337 struct ieee80211_vif *vif); 4338 4339 /** 4340 * ieee80211_probereq_get - retrieve a Probe Request template 4341 * @hw: pointer obtained from ieee80211_alloc_hw(). 4342 * @src_addr: source MAC address 4343 * @ssid: SSID buffer 4344 * @ssid_len: length of SSID 4345 * @tailroom: tailroom to reserve at end of SKB for IEs 4346 * 4347 * Creates a Probe Request template which can, for example, be uploaded to 4348 * hardware. 4349 * 4350 * Return: The Probe Request template. %NULL on error. 4351 */ 4352 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 4353 const u8 *src_addr, 4354 const u8 *ssid, size_t ssid_len, 4355 size_t tailroom); 4356 4357 /** 4358 * ieee80211_rts_get - RTS frame generation function 4359 * @hw: pointer obtained from ieee80211_alloc_hw(). 4360 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4361 * @frame: pointer to the frame that is going to be protected by the RTS. 4362 * @frame_len: the frame length (in octets). 4363 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4364 * @rts: The buffer where to store the RTS frame. 4365 * 4366 * If the RTS frames are generated by the host system (i.e., not in 4367 * hardware/firmware), the low-level driver uses this function to receive 4368 * the next RTS frame from the 802.11 code. The low-level is responsible 4369 * for calling this function before and RTS frame is needed. 4370 */ 4371 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 4372 const void *frame, size_t frame_len, 4373 const struct ieee80211_tx_info *frame_txctl, 4374 struct ieee80211_rts *rts); 4375 4376 /** 4377 * ieee80211_rts_duration - Get the duration field for an RTS frame 4378 * @hw: pointer obtained from ieee80211_alloc_hw(). 4379 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4380 * @frame_len: the length of the frame that is going to be protected by the RTS. 4381 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4382 * 4383 * If the RTS is generated in firmware, but the host system must provide 4384 * the duration field, the low-level driver uses this function to receive 4385 * the duration field value in little-endian byteorder. 4386 * 4387 * Return: The duration. 4388 */ 4389 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 4390 struct ieee80211_vif *vif, size_t frame_len, 4391 const struct ieee80211_tx_info *frame_txctl); 4392 4393 /** 4394 * ieee80211_ctstoself_get - CTS-to-self frame generation function 4395 * @hw: pointer obtained from ieee80211_alloc_hw(). 4396 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4397 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 4398 * @frame_len: the frame length (in octets). 4399 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4400 * @cts: The buffer where to store the CTS-to-self frame. 4401 * 4402 * If the CTS-to-self frames are generated by the host system (i.e., not in 4403 * hardware/firmware), the low-level driver uses this function to receive 4404 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 4405 * for calling this function before and CTS-to-self frame is needed. 4406 */ 4407 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 4408 struct ieee80211_vif *vif, 4409 const void *frame, size_t frame_len, 4410 const struct ieee80211_tx_info *frame_txctl, 4411 struct ieee80211_cts *cts); 4412 4413 /** 4414 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 4415 * @hw: pointer obtained from ieee80211_alloc_hw(). 4416 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4417 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 4418 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4419 * 4420 * If the CTS-to-self is generated in firmware, but the host system must provide 4421 * the duration field, the low-level driver uses this function to receive 4422 * the duration field value in little-endian byteorder. 4423 * 4424 * Return: The duration. 4425 */ 4426 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 4427 struct ieee80211_vif *vif, 4428 size_t frame_len, 4429 const struct ieee80211_tx_info *frame_txctl); 4430 4431 /** 4432 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 4433 * @hw: pointer obtained from ieee80211_alloc_hw(). 4434 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4435 * @band: the band to calculate the frame duration on 4436 * @frame_len: the length of the frame. 4437 * @rate: the rate at which the frame is going to be transmitted. 4438 * 4439 * Calculate the duration field of some generic frame, given its 4440 * length and transmission rate (in 100kbps). 4441 * 4442 * Return: The duration. 4443 */ 4444 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 4445 struct ieee80211_vif *vif, 4446 enum nl80211_band band, 4447 size_t frame_len, 4448 struct ieee80211_rate *rate); 4449 4450 /** 4451 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 4452 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4453 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4454 * 4455 * Function for accessing buffered broadcast and multicast frames. If 4456 * hardware/firmware does not implement buffering of broadcast/multicast 4457 * frames when power saving is used, 802.11 code buffers them in the host 4458 * memory. The low-level driver uses this function to fetch next buffered 4459 * frame. In most cases, this is used when generating beacon frame. 4460 * 4461 * Return: A pointer to the next buffered skb or NULL if no more buffered 4462 * frames are available. 4463 * 4464 * Note: buffered frames are returned only after DTIM beacon frame was 4465 * generated with ieee80211_beacon_get() and the low-level driver must thus 4466 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 4467 * NULL if the previous generated beacon was not DTIM, so the low-level driver 4468 * does not need to check for DTIM beacons separately and should be able to 4469 * use common code for all beacons. 4470 */ 4471 struct sk_buff * 4472 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 4473 4474 /** 4475 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 4476 * 4477 * This function returns the TKIP phase 1 key for the given IV32. 4478 * 4479 * @keyconf: the parameter passed with the set key 4480 * @iv32: IV32 to get the P1K for 4481 * @p1k: a buffer to which the key will be written, as 5 u16 values 4482 */ 4483 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 4484 u32 iv32, u16 *p1k); 4485 4486 /** 4487 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 4488 * 4489 * This function returns the TKIP phase 1 key for the IV32 taken 4490 * from the given packet. 4491 * 4492 * @keyconf: the parameter passed with the set key 4493 * @skb: the packet to take the IV32 value from that will be encrypted 4494 * with this P1K 4495 * @p1k: a buffer to which the key will be written, as 5 u16 values 4496 */ 4497 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 4498 struct sk_buff *skb, u16 *p1k) 4499 { 4500 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 4501 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 4502 u32 iv32 = get_unaligned_le32(&data[4]); 4503 4504 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 4505 } 4506 4507 /** 4508 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 4509 * 4510 * This function returns the TKIP phase 1 key for the given IV32 4511 * and transmitter address. 4512 * 4513 * @keyconf: the parameter passed with the set key 4514 * @ta: TA that will be used with the key 4515 * @iv32: IV32 to get the P1K for 4516 * @p1k: a buffer to which the key will be written, as 5 u16 values 4517 */ 4518 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 4519 const u8 *ta, u32 iv32, u16 *p1k); 4520 4521 /** 4522 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 4523 * 4524 * This function computes the TKIP RC4 key for the IV values 4525 * in the packet. 4526 * 4527 * @keyconf: the parameter passed with the set key 4528 * @skb: the packet to take the IV32/IV16 values from that will be 4529 * encrypted with this key 4530 * @p2k: a buffer to which the key will be written, 16 bytes 4531 */ 4532 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 4533 struct sk_buff *skb, u8 *p2k); 4534 4535 /** 4536 * ieee80211_tkip_add_iv - write TKIP IV and Ext. IV to pos 4537 * 4538 * @pos: start of crypto header 4539 * @keyconf: the parameter passed with the set key 4540 * @pn: PN to add 4541 * 4542 * Returns: pointer to the octet following IVs (i.e. beginning of 4543 * the packet payload) 4544 * 4545 * This function writes the tkip IV value to pos (which should 4546 * point to the crypto header) 4547 */ 4548 u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key_conf *keyconf, u64 pn); 4549 4550 /** 4551 * ieee80211_get_key_rx_seq - get key RX sequence counter 4552 * 4553 * @keyconf: the parameter passed with the set key 4554 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4555 * the value on TID 0 is also used for non-QoS frames. For 4556 * CMAC, only TID 0 is valid. 4557 * @seq: buffer to receive the sequence data 4558 * 4559 * This function allows a driver to retrieve the current RX IV/PNs 4560 * for the given key. It must not be called if IV checking is done 4561 * by the device and not by mac80211. 4562 * 4563 * Note that this function may only be called when no RX processing 4564 * can be done concurrently. 4565 */ 4566 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 4567 int tid, struct ieee80211_key_seq *seq); 4568 4569 /** 4570 * ieee80211_set_key_rx_seq - set key RX sequence counter 4571 * 4572 * @keyconf: the parameter passed with the set key 4573 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4574 * the value on TID 0 is also used for non-QoS frames. For 4575 * CMAC, only TID 0 is valid. 4576 * @seq: new sequence data 4577 * 4578 * This function allows a driver to set the current RX IV/PNs for the 4579 * given key. This is useful when resuming from WoWLAN sleep and GTK 4580 * rekey may have been done while suspended. It should not be called 4581 * if IV checking is done by the device and not by mac80211. 4582 * 4583 * Note that this function may only be called when no RX processing 4584 * can be done concurrently. 4585 */ 4586 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 4587 int tid, struct ieee80211_key_seq *seq); 4588 4589 /** 4590 * ieee80211_remove_key - remove the given key 4591 * @keyconf: the parameter passed with the set key 4592 * 4593 * Remove the given key. If the key was uploaded to the hardware at the 4594 * time this function is called, it is not deleted in the hardware but 4595 * instead assumed to have been removed already. 4596 * 4597 * Note that due to locking considerations this function can (currently) 4598 * only be called during key iteration (ieee80211_iter_keys().) 4599 */ 4600 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 4601 4602 /** 4603 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 4604 * @vif: the virtual interface to add the key on 4605 * @keyconf: new key data 4606 * 4607 * When GTK rekeying was done while the system was suspended, (a) new 4608 * key(s) will be available. These will be needed by mac80211 for proper 4609 * RX processing, so this function allows setting them. 4610 * 4611 * The function returns the newly allocated key structure, which will 4612 * have similar contents to the passed key configuration but point to 4613 * mac80211-owned memory. In case of errors, the function returns an 4614 * ERR_PTR(), use IS_ERR() etc. 4615 * 4616 * Note that this function assumes the key isn't added to hardware 4617 * acceleration, so no TX will be done with the key. Since it's a GTK 4618 * on managed (station) networks, this is true anyway. If the driver 4619 * calls this function from the resume callback and subsequently uses 4620 * the return code 1 to reconfigure the device, this key will be part 4621 * of the reconfiguration. 4622 * 4623 * Note that the driver should also call ieee80211_set_key_rx_seq() 4624 * for the new key for each TID to set up sequence counters properly. 4625 * 4626 * IMPORTANT: If this replaces a key that is present in the hardware, 4627 * then it will attempt to remove it during this call. In many cases 4628 * this isn't what you want, so call ieee80211_remove_key() first for 4629 * the key that's being replaced. 4630 */ 4631 struct ieee80211_key_conf * 4632 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 4633 struct ieee80211_key_conf *keyconf); 4634 4635 /** 4636 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 4637 * @vif: virtual interface the rekeying was done on 4638 * @bssid: The BSSID of the AP, for checking association 4639 * @replay_ctr: the new replay counter after GTK rekeying 4640 * @gfp: allocation flags 4641 */ 4642 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 4643 const u8 *replay_ctr, gfp_t gfp); 4644 4645 /** 4646 * ieee80211_wake_queue - wake specific queue 4647 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4648 * @queue: queue number (counted from zero). 4649 * 4650 * Drivers should use this function instead of netif_wake_queue. 4651 */ 4652 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 4653 4654 /** 4655 * ieee80211_stop_queue - stop specific queue 4656 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4657 * @queue: queue number (counted from zero). 4658 * 4659 * Drivers should use this function instead of netif_stop_queue. 4660 */ 4661 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 4662 4663 /** 4664 * ieee80211_queue_stopped - test status of the queue 4665 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4666 * @queue: queue number (counted from zero). 4667 * 4668 * Drivers should use this function instead of netif_stop_queue. 4669 * 4670 * Return: %true if the queue is stopped. %false otherwise. 4671 */ 4672 4673 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 4674 4675 /** 4676 * ieee80211_stop_queues - stop all queues 4677 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4678 * 4679 * Drivers should use this function instead of netif_stop_queue. 4680 */ 4681 void ieee80211_stop_queues(struct ieee80211_hw *hw); 4682 4683 /** 4684 * ieee80211_wake_queues - wake all queues 4685 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4686 * 4687 * Drivers should use this function instead of netif_wake_queue. 4688 */ 4689 void ieee80211_wake_queues(struct ieee80211_hw *hw); 4690 4691 /** 4692 * ieee80211_scan_completed - completed hardware scan 4693 * 4694 * When hardware scan offload is used (i.e. the hw_scan() callback is 4695 * assigned) this function needs to be called by the driver to notify 4696 * mac80211 that the scan finished. This function can be called from 4697 * any context, including hardirq context. 4698 * 4699 * @hw: the hardware that finished the scan 4700 * @info: information about the completed scan 4701 */ 4702 void ieee80211_scan_completed(struct ieee80211_hw *hw, 4703 struct cfg80211_scan_info *info); 4704 4705 /** 4706 * ieee80211_sched_scan_results - got results from scheduled scan 4707 * 4708 * When a scheduled scan is running, this function needs to be called by the 4709 * driver whenever there are new scan results available. 4710 * 4711 * @hw: the hardware that is performing scheduled scans 4712 */ 4713 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 4714 4715 /** 4716 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 4717 * 4718 * When a scheduled scan is running, this function can be called by 4719 * the driver if it needs to stop the scan to perform another task. 4720 * Usual scenarios are drivers that cannot continue the scheduled scan 4721 * while associating, for instance. 4722 * 4723 * @hw: the hardware that is performing scheduled scans 4724 */ 4725 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 4726 4727 /** 4728 * enum ieee80211_interface_iteration_flags - interface iteration flags 4729 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 4730 * been added to the driver; However, note that during hardware 4731 * reconfiguration (after restart_hw) it will iterate over a new 4732 * interface and over all the existing interfaces even if they 4733 * haven't been re-added to the driver yet. 4734 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 4735 * interfaces, even if they haven't been re-added to the driver yet. 4736 * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up). 4737 */ 4738 enum ieee80211_interface_iteration_flags { 4739 IEEE80211_IFACE_ITER_NORMAL = 0, 4740 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 4741 IEEE80211_IFACE_ITER_ACTIVE = BIT(1), 4742 }; 4743 4744 /** 4745 * ieee80211_iterate_interfaces - iterate interfaces 4746 * 4747 * This function iterates over the interfaces associated with a given 4748 * hardware and calls the callback for them. This includes active as well as 4749 * inactive interfaces. This function allows the iterator function to sleep. 4750 * Will iterate over a new interface during add_interface(). 4751 * 4752 * @hw: the hardware struct of which the interfaces should be iterated over 4753 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4754 * @iterator: the iterator function to call 4755 * @data: first argument of the iterator function 4756 */ 4757 void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4758 void (*iterator)(void *data, u8 *mac, 4759 struct ieee80211_vif *vif), 4760 void *data); 4761 4762 /** 4763 * ieee80211_iterate_active_interfaces - iterate active interfaces 4764 * 4765 * This function iterates over the interfaces associated with a given 4766 * hardware that are currently active and calls the callback for them. 4767 * This function allows the iterator function to sleep, when the iterator 4768 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 4769 * be used. 4770 * Does not iterate over a new interface during add_interface(). 4771 * 4772 * @hw: the hardware struct of which the interfaces should be iterated over 4773 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4774 * @iterator: the iterator function to call 4775 * @data: first argument of the iterator function 4776 */ 4777 static inline void 4778 ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4779 void (*iterator)(void *data, u8 *mac, 4780 struct ieee80211_vif *vif), 4781 void *data) 4782 { 4783 ieee80211_iterate_interfaces(hw, 4784 iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 4785 iterator, data); 4786 } 4787 4788 /** 4789 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 4790 * 4791 * This function iterates over the interfaces associated with a given 4792 * hardware that are currently active and calls the callback for them. 4793 * This function requires the iterator callback function to be atomic, 4794 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4795 * Does not iterate over a new interface during add_interface(). 4796 * 4797 * @hw: the hardware struct of which the interfaces should be iterated over 4798 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4799 * @iterator: the iterator function to call, cannot sleep 4800 * @data: first argument of the iterator function 4801 */ 4802 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4803 u32 iter_flags, 4804 void (*iterator)(void *data, 4805 u8 *mac, 4806 struct ieee80211_vif *vif), 4807 void *data); 4808 4809 /** 4810 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4811 * 4812 * This function iterates over the interfaces associated with a given 4813 * hardware that are currently active and calls the callback for them. 4814 * This version can only be used while holding the RTNL. 4815 * 4816 * @hw: the hardware struct of which the interfaces should be iterated over 4817 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4818 * @iterator: the iterator function to call, cannot sleep 4819 * @data: first argument of the iterator function 4820 */ 4821 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4822 u32 iter_flags, 4823 void (*iterator)(void *data, 4824 u8 *mac, 4825 struct ieee80211_vif *vif), 4826 void *data); 4827 4828 /** 4829 * ieee80211_iterate_stations_atomic - iterate stations 4830 * 4831 * This function iterates over all stations associated with a given 4832 * hardware that are currently uploaded to the driver and calls the callback 4833 * function for them. 4834 * This function requires the iterator callback function to be atomic, 4835 * 4836 * @hw: the hardware struct of which the interfaces should be iterated over 4837 * @iterator: the iterator function to call, cannot sleep 4838 * @data: first argument of the iterator function 4839 */ 4840 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 4841 void (*iterator)(void *data, 4842 struct ieee80211_sta *sta), 4843 void *data); 4844 /** 4845 * ieee80211_queue_work - add work onto the mac80211 workqueue 4846 * 4847 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4848 * This helper ensures drivers are not queueing work when they should not be. 4849 * 4850 * @hw: the hardware struct for the interface we are adding work for 4851 * @work: the work we want to add onto the mac80211 workqueue 4852 */ 4853 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4854 4855 /** 4856 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4857 * 4858 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4859 * workqueue. 4860 * 4861 * @hw: the hardware struct for the interface we are adding work for 4862 * @dwork: delayable work to queue onto the mac80211 workqueue 4863 * @delay: number of jiffies to wait before queueing 4864 */ 4865 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4866 struct delayed_work *dwork, 4867 unsigned long delay); 4868 4869 /** 4870 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4871 * @sta: the station for which to start a BA session 4872 * @tid: the TID to BA on. 4873 * @timeout: session timeout value (in TUs) 4874 * 4875 * Return: success if addBA request was sent, failure otherwise 4876 * 4877 * Although mac80211/low level driver/user space application can estimate 4878 * the need to start aggregation on a certain RA/TID, the session level 4879 * will be managed by the mac80211. 4880 */ 4881 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4882 u16 timeout); 4883 4884 /** 4885 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4886 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4887 * @ra: receiver address of the BA session recipient. 4888 * @tid: the TID to BA on. 4889 * 4890 * This function must be called by low level driver once it has 4891 * finished with preparations for the BA session. It can be called 4892 * from any context. 4893 */ 4894 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4895 u16 tid); 4896 4897 /** 4898 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4899 * @sta: the station whose BA session to stop 4900 * @tid: the TID to stop BA. 4901 * 4902 * Return: negative error if the TID is invalid, or no aggregation active 4903 * 4904 * Although mac80211/low level driver/user space application can estimate 4905 * the need to stop aggregation on a certain RA/TID, the session level 4906 * will be managed by the mac80211. 4907 */ 4908 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4909 4910 /** 4911 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4912 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4913 * @ra: receiver address of the BA session recipient. 4914 * @tid: the desired TID to BA on. 4915 * 4916 * This function must be called by low level driver once it has 4917 * finished with preparations for the BA session tear down. It 4918 * can be called from any context. 4919 */ 4920 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4921 u16 tid); 4922 4923 /** 4924 * ieee80211_find_sta - find a station 4925 * 4926 * @vif: virtual interface to look for station on 4927 * @addr: station's address 4928 * 4929 * Return: The station, if found. %NULL otherwise. 4930 * 4931 * Note: This function must be called under RCU lock and the 4932 * resulting pointer is only valid under RCU lock as well. 4933 */ 4934 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 4935 const u8 *addr); 4936 4937 /** 4938 * ieee80211_find_sta_by_ifaddr - find a station on hardware 4939 * 4940 * @hw: pointer as obtained from ieee80211_alloc_hw() 4941 * @addr: remote station's address 4942 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 4943 * 4944 * Return: The station, if found. %NULL otherwise. 4945 * 4946 * Note: This function must be called under RCU lock and the 4947 * resulting pointer is only valid under RCU lock as well. 4948 * 4949 * NOTE: You may pass NULL for localaddr, but then you will just get 4950 * the first STA that matches the remote address 'addr'. 4951 * We can have multiple STA associated with multiple 4952 * logical stations (e.g. consider a station connecting to another 4953 * BSSID on the same AP hardware without disconnecting first). 4954 * In this case, the result of this method with localaddr NULL 4955 * is not reliable. 4956 * 4957 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 4958 */ 4959 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 4960 const u8 *addr, 4961 const u8 *localaddr); 4962 4963 /** 4964 * ieee80211_sta_block_awake - block station from waking up 4965 * @hw: the hardware 4966 * @pubsta: the station 4967 * @block: whether to block or unblock 4968 * 4969 * Some devices require that all frames that are on the queues 4970 * for a specific station that went to sleep are flushed before 4971 * a poll response or frames after the station woke up can be 4972 * delivered to that it. Note that such frames must be rejected 4973 * by the driver as filtered, with the appropriate status flag. 4974 * 4975 * This function allows implementing this mode in a race-free 4976 * manner. 4977 * 4978 * To do this, a driver must keep track of the number of frames 4979 * still enqueued for a specific station. If this number is not 4980 * zero when the station goes to sleep, the driver must call 4981 * this function to force mac80211 to consider the station to 4982 * be asleep regardless of the station's actual state. Once the 4983 * number of outstanding frames reaches zero, the driver must 4984 * call this function again to unblock the station. That will 4985 * cause mac80211 to be able to send ps-poll responses, and if 4986 * the station queried in the meantime then frames will also 4987 * be sent out as a result of this. Additionally, the driver 4988 * will be notified that the station woke up some time after 4989 * it is unblocked, regardless of whether the station actually 4990 * woke up while blocked or not. 4991 */ 4992 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 4993 struct ieee80211_sta *pubsta, bool block); 4994 4995 /** 4996 * ieee80211_sta_eosp - notify mac80211 about end of SP 4997 * @pubsta: the station 4998 * 4999 * When a device transmits frames in a way that it can't tell 5000 * mac80211 in the TX status about the EOSP, it must clear the 5001 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 5002 * This applies for PS-Poll as well as uAPSD. 5003 * 5004 * Note that just like with _tx_status() and _rx() drivers must 5005 * not mix calls to irqsafe/non-irqsafe versions, this function 5006 * must not be mixed with those either. Use the all irqsafe, or 5007 * all non-irqsafe, don't mix! 5008 * 5009 * NB: the _irqsafe version of this function doesn't exist, no 5010 * driver needs it right now. Don't call this function if 5011 * you'd need the _irqsafe version, look at the git history 5012 * and restore the _irqsafe version! 5013 */ 5014 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 5015 5016 /** 5017 * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP 5018 * @pubsta: the station 5019 * @tid: the tid of the NDP 5020 * 5021 * Sometimes the device understands that it needs to close 5022 * the Service Period unexpectedly. This can happen when 5023 * sending frames that are filling holes in the BA window. 5024 * In this case, the device can ask mac80211 to send a 5025 * Nullfunc frame with EOSP set. When that happens, the 5026 * driver must have called ieee80211_sta_set_buffered() to 5027 * let mac80211 know that there are no buffered frames any 5028 * more, otherwise mac80211 will get the more_data bit wrong. 5029 * The low level driver must have made sure that the frame 5030 * will be sent despite the station being in power-save. 5031 * Mac80211 won't call allow_buffered_frames(). 5032 * Note that calling this function, doesn't exempt the driver 5033 * from closing the EOSP properly, it will still have to call 5034 * ieee80211_sta_eosp when the NDP is sent. 5035 */ 5036 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid); 5037 5038 /** 5039 * ieee80211_iter_keys - iterate keys programmed into the device 5040 * @hw: pointer obtained from ieee80211_alloc_hw() 5041 * @vif: virtual interface to iterate, may be %NULL for all 5042 * @iter: iterator function that will be called for each key 5043 * @iter_data: custom data to pass to the iterator function 5044 * 5045 * This function can be used to iterate all the keys known to 5046 * mac80211, even those that weren't previously programmed into 5047 * the device. This is intended for use in WoWLAN if the device 5048 * needs reprogramming of the keys during suspend. Note that due 5049 * to locking reasons, it is also only safe to call this at few 5050 * spots since it must hold the RTNL and be able to sleep. 5051 * 5052 * The order in which the keys are iterated matches the order 5053 * in which they were originally installed and handed to the 5054 * set_key callback. 5055 */ 5056 void ieee80211_iter_keys(struct ieee80211_hw *hw, 5057 struct ieee80211_vif *vif, 5058 void (*iter)(struct ieee80211_hw *hw, 5059 struct ieee80211_vif *vif, 5060 struct ieee80211_sta *sta, 5061 struct ieee80211_key_conf *key, 5062 void *data), 5063 void *iter_data); 5064 5065 /** 5066 * ieee80211_iter_keys_rcu - iterate keys programmed into the device 5067 * @hw: pointer obtained from ieee80211_alloc_hw() 5068 * @vif: virtual interface to iterate, may be %NULL for all 5069 * @iter: iterator function that will be called for each key 5070 * @iter_data: custom data to pass to the iterator function 5071 * 5072 * This function can be used to iterate all the keys known to 5073 * mac80211, even those that weren't previously programmed into 5074 * the device. Note that due to locking reasons, keys of station 5075 * in removal process will be skipped. 5076 * 5077 * This function requires being called in an RCU critical section, 5078 * and thus iter must be atomic. 5079 */ 5080 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, 5081 struct ieee80211_vif *vif, 5082 void (*iter)(struct ieee80211_hw *hw, 5083 struct ieee80211_vif *vif, 5084 struct ieee80211_sta *sta, 5085 struct ieee80211_key_conf *key, 5086 void *data), 5087 void *iter_data); 5088 5089 /** 5090 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 5091 * @hw: pointre obtained from ieee80211_alloc_hw(). 5092 * @iter: iterator function 5093 * @iter_data: data passed to iterator function 5094 * 5095 * Iterate all active channel contexts. This function is atomic and 5096 * doesn't acquire any locks internally that might be held in other 5097 * places while calling into the driver. 5098 * 5099 * The iterator will not find a context that's being added (during 5100 * the driver callback to add it) but will find it while it's being 5101 * removed. 5102 * 5103 * Note that during hardware restart, all contexts that existed 5104 * before the restart are considered already present so will be 5105 * found while iterating, whether they've been re-added already 5106 * or not. 5107 */ 5108 void ieee80211_iter_chan_contexts_atomic( 5109 struct ieee80211_hw *hw, 5110 void (*iter)(struct ieee80211_hw *hw, 5111 struct ieee80211_chanctx_conf *chanctx_conf, 5112 void *data), 5113 void *iter_data); 5114 5115 /** 5116 * ieee80211_ap_probereq_get - retrieve a Probe Request template 5117 * @hw: pointer obtained from ieee80211_alloc_hw(). 5118 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5119 * 5120 * Creates a Probe Request template which can, for example, be uploaded to 5121 * hardware. The template is filled with bssid, ssid and supported rate 5122 * information. This function must only be called from within the 5123 * .bss_info_changed callback function and only in managed mode. The function 5124 * is only useful when the interface is associated, otherwise it will return 5125 * %NULL. 5126 * 5127 * Return: The Probe Request template. %NULL on error. 5128 */ 5129 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 5130 struct ieee80211_vif *vif); 5131 5132 /** 5133 * ieee80211_beacon_loss - inform hardware does not receive beacons 5134 * 5135 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5136 * 5137 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 5138 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 5139 * hardware is not receiving beacons with this function. 5140 */ 5141 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 5142 5143 /** 5144 * ieee80211_connection_loss - inform hardware has lost connection to the AP 5145 * 5146 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5147 * 5148 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 5149 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 5150 * needs to inform if the connection to the AP has been lost. 5151 * The function may also be called if the connection needs to be terminated 5152 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 5153 * 5154 * This function will cause immediate change to disassociated state, 5155 * without connection recovery attempts. 5156 */ 5157 void ieee80211_connection_loss(struct ieee80211_vif *vif); 5158 5159 /** 5160 * ieee80211_resume_disconnect - disconnect from AP after resume 5161 * 5162 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5163 * 5164 * Instructs mac80211 to disconnect from the AP after resume. 5165 * Drivers can use this after WoWLAN if they know that the 5166 * connection cannot be kept up, for example because keys were 5167 * used while the device was asleep but the replay counters or 5168 * similar cannot be retrieved from the device during resume. 5169 * 5170 * Note that due to implementation issues, if the driver uses 5171 * the reconfiguration functionality during resume the interface 5172 * will still be added as associated first during resume and then 5173 * disconnect normally later. 5174 * 5175 * This function can only be called from the resume callback and 5176 * the driver must not be holding any of its own locks while it 5177 * calls this function, or at least not any locks it needs in the 5178 * key configuration paths (if it supports HW crypto). 5179 */ 5180 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 5181 5182 /** 5183 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 5184 * rssi threshold triggered 5185 * 5186 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5187 * @rssi_event: the RSSI trigger event type 5188 * @gfp: context flags 5189 * 5190 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 5191 * monitoring is configured with an rssi threshold, the driver will inform 5192 * whenever the rssi level reaches the threshold. 5193 */ 5194 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5195 enum nl80211_cqm_rssi_threshold_event rssi_event, 5196 gfp_t gfp); 5197 5198 /** 5199 * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss 5200 * 5201 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5202 * @gfp: context flags 5203 */ 5204 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp); 5205 5206 /** 5207 * ieee80211_radar_detected - inform that a radar was detected 5208 * 5209 * @hw: pointer as obtained from ieee80211_alloc_hw() 5210 */ 5211 void ieee80211_radar_detected(struct ieee80211_hw *hw); 5212 5213 /** 5214 * ieee80211_chswitch_done - Complete channel switch process 5215 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5216 * @success: make the channel switch successful or not 5217 * 5218 * Complete the channel switch post-process: set the new operational channel 5219 * and wake up the suspended queues. 5220 */ 5221 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 5222 5223 /** 5224 * ieee80211_request_smps - request SM PS transition 5225 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5226 * @smps_mode: new SM PS mode 5227 * 5228 * This allows the driver to request an SM PS transition in managed 5229 * mode. This is useful when the driver has more information than 5230 * the stack about possible interference, for example by bluetooth. 5231 */ 5232 void ieee80211_request_smps(struct ieee80211_vif *vif, 5233 enum ieee80211_smps_mode smps_mode); 5234 5235 /** 5236 * ieee80211_ready_on_channel - notification of remain-on-channel start 5237 * @hw: pointer as obtained from ieee80211_alloc_hw() 5238 */ 5239 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 5240 5241 /** 5242 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 5243 * @hw: pointer as obtained from ieee80211_alloc_hw() 5244 */ 5245 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 5246 5247 /** 5248 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 5249 * 5250 * in order not to harm the system performance and user experience, the device 5251 * may request not to allow any rx ba session and tear down existing rx ba 5252 * sessions based on system constraints such as periodic BT activity that needs 5253 * to limit wlan activity (eg.sco or a2dp)." 5254 * in such cases, the intention is to limit the duration of the rx ppdu and 5255 * therefore prevent the peer device to use a-mpdu aggregation. 5256 * 5257 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5258 * @ba_rx_bitmap: Bit map of open rx ba per tid 5259 * @addr: & to bssid mac address 5260 */ 5261 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 5262 const u8 *addr); 5263 5264 /** 5265 * ieee80211_mark_rx_ba_filtered_frames - move RX BA window and mark filtered 5266 * @pubsta: station struct 5267 * @tid: the session's TID 5268 * @ssn: starting sequence number of the bitmap, all frames before this are 5269 * assumed to be out of the window after the call 5270 * @filtered: bitmap of filtered frames, BIT(0) is the @ssn entry etc. 5271 * @received_mpdus: number of received mpdus in firmware 5272 * 5273 * This function moves the BA window and releases all frames before @ssn, and 5274 * marks frames marked in the bitmap as having been filtered. Afterwards, it 5275 * checks if any frames in the window starting from @ssn can now be released 5276 * (in case they were only waiting for frames that were filtered.) 5277 */ 5278 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid, 5279 u16 ssn, u64 filtered, 5280 u16 received_mpdus); 5281 5282 /** 5283 * ieee80211_send_bar - send a BlockAckReq frame 5284 * 5285 * can be used to flush pending frames from the peer's aggregation reorder 5286 * buffer. 5287 * 5288 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5289 * @ra: the peer's destination address 5290 * @tid: the TID of the aggregation session 5291 * @ssn: the new starting sequence number for the receiver 5292 */ 5293 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 5294 5295 /** 5296 * ieee80211_start_rx_ba_session_offl - start a Rx BA session 5297 * 5298 * Some device drivers may offload part of the Rx aggregation flow including 5299 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5300 * reordering. 5301 * 5302 * Create structures responsible for reordering so device drivers may call here 5303 * when they complete AddBa negotiation. 5304 * 5305 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5306 * @addr: station mac address 5307 * @tid: the rx tid 5308 */ 5309 void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, 5310 const u8 *addr, u16 tid); 5311 5312 /** 5313 * ieee80211_stop_rx_ba_session_offl - stop a Rx BA session 5314 * 5315 * Some device drivers may offload part of the Rx aggregation flow including 5316 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5317 * reordering. 5318 * 5319 * Destroy structures responsible for reordering so device drivers may call here 5320 * when they complete DelBa negotiation. 5321 * 5322 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5323 * @addr: station mac address 5324 * @tid: the rx tid 5325 */ 5326 void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, 5327 const u8 *addr, u16 tid); 5328 5329 /* Rate control API */ 5330 5331 /** 5332 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 5333 * 5334 * @hw: The hardware the algorithm is invoked for. 5335 * @sband: The band this frame is being transmitted on. 5336 * @bss_conf: the current BSS configuration 5337 * @skb: the skb that will be transmitted, the control information in it needs 5338 * to be filled in 5339 * @reported_rate: The rate control algorithm can fill this in to indicate 5340 * which rate should be reported to userspace as the current rate and 5341 * used for rate calculations in the mesh network. 5342 * @rts: whether RTS will be used for this frame because it is longer than the 5343 * RTS threshold 5344 * @short_preamble: whether mac80211 will request short-preamble transmission 5345 * if the selected rate supports it 5346 * @max_rate_idx: user-requested maximum (legacy) rate 5347 * (deprecated; this will be removed once drivers get updated to use 5348 * rate_idx_mask) 5349 * @rate_idx_mask: user-requested (legacy) rate mask 5350 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 5351 * @bss: whether this frame is sent out in AP or IBSS mode 5352 */ 5353 struct ieee80211_tx_rate_control { 5354 struct ieee80211_hw *hw; 5355 struct ieee80211_supported_band *sband; 5356 struct ieee80211_bss_conf *bss_conf; 5357 struct sk_buff *skb; 5358 struct ieee80211_tx_rate reported_rate; 5359 bool rts, short_preamble; 5360 u8 max_rate_idx; 5361 u32 rate_idx_mask; 5362 u8 *rate_idx_mcs_mask; 5363 bool bss; 5364 }; 5365 5366 struct rate_control_ops { 5367 const char *name; 5368 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 5369 void (*free)(void *priv); 5370 5371 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 5372 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 5373 struct cfg80211_chan_def *chandef, 5374 struct ieee80211_sta *sta, void *priv_sta); 5375 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 5376 struct cfg80211_chan_def *chandef, 5377 struct ieee80211_sta *sta, void *priv_sta, 5378 u32 changed); 5379 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 5380 void *priv_sta); 5381 5382 void (*tx_status_noskb)(void *priv, 5383 struct ieee80211_supported_band *sband, 5384 struct ieee80211_sta *sta, void *priv_sta, 5385 struct ieee80211_tx_info *info); 5386 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 5387 struct ieee80211_sta *sta, void *priv_sta, 5388 struct sk_buff *skb); 5389 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 5390 struct ieee80211_tx_rate_control *txrc); 5391 5392 void (*add_sta_debugfs)(void *priv, void *priv_sta, 5393 struct dentry *dir); 5394 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 5395 5396 u32 (*get_expected_throughput)(void *priv_sta); 5397 }; 5398 5399 static inline int rate_supported(struct ieee80211_sta *sta, 5400 enum nl80211_band band, 5401 int index) 5402 { 5403 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 5404 } 5405 5406 /** 5407 * rate_control_send_low - helper for drivers for management/no-ack frames 5408 * 5409 * Rate control algorithms that agree to use the lowest rate to 5410 * send management frames and NO_ACK data with the respective hw 5411 * retries should use this in the beginning of their mac80211 get_rate 5412 * callback. If true is returned the rate control can simply return. 5413 * If false is returned we guarantee that sta and sta and priv_sta is 5414 * not null. 5415 * 5416 * Rate control algorithms wishing to do more intelligent selection of 5417 * rate for multicast/broadcast frames may choose to not use this. 5418 * 5419 * @sta: &struct ieee80211_sta pointer to the target destination. Note 5420 * that this may be null. 5421 * @priv_sta: private rate control structure. This may be null. 5422 * @txrc: rate control information we sholud populate for mac80211. 5423 */ 5424 bool rate_control_send_low(struct ieee80211_sta *sta, 5425 void *priv_sta, 5426 struct ieee80211_tx_rate_control *txrc); 5427 5428 5429 static inline s8 5430 rate_lowest_index(struct ieee80211_supported_band *sband, 5431 struct ieee80211_sta *sta) 5432 { 5433 int i; 5434 5435 for (i = 0; i < sband->n_bitrates; i++) 5436 if (rate_supported(sta, sband->band, i)) 5437 return i; 5438 5439 /* warn when we cannot find a rate. */ 5440 WARN_ON_ONCE(1); 5441 5442 /* and return 0 (the lowest index) */ 5443 return 0; 5444 } 5445 5446 static inline 5447 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 5448 struct ieee80211_sta *sta) 5449 { 5450 unsigned int i; 5451 5452 for (i = 0; i < sband->n_bitrates; i++) 5453 if (rate_supported(sta, sband->band, i)) 5454 return true; 5455 return false; 5456 } 5457 5458 /** 5459 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 5460 * 5461 * When not doing a rate control probe to test rates, rate control should pass 5462 * its rate selection to mac80211. If the driver supports receiving a station 5463 * rate table, it will use it to ensure that frames are always sent based on 5464 * the most recent rate control module decision. 5465 * 5466 * @hw: pointer as obtained from ieee80211_alloc_hw() 5467 * @pubsta: &struct ieee80211_sta pointer to the target destination. 5468 * @rates: new tx rate set to be used for this station. 5469 */ 5470 int rate_control_set_rates(struct ieee80211_hw *hw, 5471 struct ieee80211_sta *pubsta, 5472 struct ieee80211_sta_rates *rates); 5473 5474 int ieee80211_rate_control_register(const struct rate_control_ops *ops); 5475 void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 5476 5477 static inline bool 5478 conf_is_ht20(struct ieee80211_conf *conf) 5479 { 5480 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 5481 } 5482 5483 static inline bool 5484 conf_is_ht40_minus(struct ieee80211_conf *conf) 5485 { 5486 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5487 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 5488 } 5489 5490 static inline bool 5491 conf_is_ht40_plus(struct ieee80211_conf *conf) 5492 { 5493 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5494 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 5495 } 5496 5497 static inline bool 5498 conf_is_ht40(struct ieee80211_conf *conf) 5499 { 5500 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 5501 } 5502 5503 static inline bool 5504 conf_is_ht(struct ieee80211_conf *conf) 5505 { 5506 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) && 5507 (conf->chandef.width != NL80211_CHAN_WIDTH_10) && 5508 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT); 5509 } 5510 5511 static inline enum nl80211_iftype 5512 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 5513 { 5514 if (p2p) { 5515 switch (type) { 5516 case NL80211_IFTYPE_STATION: 5517 return NL80211_IFTYPE_P2P_CLIENT; 5518 case NL80211_IFTYPE_AP: 5519 return NL80211_IFTYPE_P2P_GO; 5520 default: 5521 break; 5522 } 5523 } 5524 return type; 5525 } 5526 5527 static inline enum nl80211_iftype 5528 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 5529 { 5530 return ieee80211_iftype_p2p(vif->type, vif->p2p); 5531 } 5532 5533 /** 5534 * ieee80211_update_mu_groups - set the VHT MU-MIMO groud data 5535 * 5536 * @vif: the specified virtual interface 5537 * @membership: 64 bits array - a bit is set if station is member of the group 5538 * @position: 2 bits per group id indicating the position in the group 5539 * 5540 * Note: This function assumes that the given vif is valid and the position and 5541 * membership data is of the correct size and are in the same byte order as the 5542 * matching GroupId management frame. 5543 * Calls to this function need to be serialized with RX path. 5544 */ 5545 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 5546 const u8 *membership, const u8 *position); 5547 5548 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 5549 int rssi_min_thold, 5550 int rssi_max_thold); 5551 5552 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 5553 5554 /** 5555 * ieee80211_ave_rssi - report the average RSSI for the specified interface 5556 * 5557 * @vif: the specified virtual interface 5558 * 5559 * Note: This function assumes that the given vif is valid. 5560 * 5561 * Return: The average RSSI value for the requested interface, or 0 if not 5562 * applicable. 5563 */ 5564 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 5565 5566 /** 5567 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 5568 * @vif: virtual interface 5569 * @wakeup: wakeup reason(s) 5570 * @gfp: allocation flags 5571 * 5572 * See cfg80211_report_wowlan_wakeup(). 5573 */ 5574 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 5575 struct cfg80211_wowlan_wakeup *wakeup, 5576 gfp_t gfp); 5577 5578 /** 5579 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 5580 * @hw: pointer as obtained from ieee80211_alloc_hw() 5581 * @vif: virtual interface 5582 * @skb: frame to be sent from within the driver 5583 * @band: the band to transmit on 5584 * @sta: optional pointer to get the station to send the frame to 5585 * 5586 * Note: must be called under RCU lock 5587 */ 5588 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 5589 struct ieee80211_vif *vif, struct sk_buff *skb, 5590 int band, struct ieee80211_sta **sta); 5591 5592 /** 5593 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 5594 * 5595 * @next_tsf: TSF timestamp of the next absent state change 5596 * @has_next_tsf: next absent state change event pending 5597 * 5598 * @absent: descriptor bitmask, set if GO is currently absent 5599 * 5600 * private: 5601 * 5602 * @count: count fields from the NoA descriptors 5603 * @desc: adjusted data from the NoA 5604 */ 5605 struct ieee80211_noa_data { 5606 u32 next_tsf; 5607 bool has_next_tsf; 5608 5609 u8 absent; 5610 5611 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 5612 struct { 5613 u32 start; 5614 u32 duration; 5615 u32 interval; 5616 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 5617 }; 5618 5619 /** 5620 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 5621 * 5622 * @attr: P2P NoA IE 5623 * @data: NoA tracking data 5624 * @tsf: current TSF timestamp 5625 * 5626 * Return: number of successfully parsed descriptors 5627 */ 5628 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 5629 struct ieee80211_noa_data *data, u32 tsf); 5630 5631 /** 5632 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 5633 * 5634 * @data: NoA tracking data 5635 * @tsf: current TSF timestamp 5636 */ 5637 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 5638 5639 /** 5640 * ieee80211_tdls_oper - request userspace to perform a TDLS operation 5641 * @vif: virtual interface 5642 * @peer: the peer's destination address 5643 * @oper: the requested TDLS operation 5644 * @reason_code: reason code for the operation, valid for TDLS teardown 5645 * @gfp: allocation flags 5646 * 5647 * See cfg80211_tdls_oper_request(). 5648 */ 5649 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, 5650 enum nl80211_tdls_operation oper, 5651 u16 reason_code, gfp_t gfp); 5652 5653 /** 5654 * ieee80211_reserve_tid - request to reserve a specific TID 5655 * 5656 * There is sometimes a need (such as in TDLS) for blocking the driver from 5657 * using a specific TID so that the FW can use it for certain operations such 5658 * as sending PTI requests. To make sure that the driver doesn't use that TID, 5659 * this function must be called as it flushes out packets on this TID and marks 5660 * it as blocked, so that any transmit for the station on this TID will be 5661 * redirected to the alternative TID in the same AC. 5662 * 5663 * Note that this function blocks and may call back into the driver, so it 5664 * should be called without driver locks held. Also note this function should 5665 * only be called from the driver's @sta_state callback. 5666 * 5667 * @sta: the station to reserve the TID for 5668 * @tid: the TID to reserve 5669 * 5670 * Returns: 0 on success, else on failure 5671 */ 5672 int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid); 5673 5674 /** 5675 * ieee80211_unreserve_tid - request to unreserve a specific TID 5676 * 5677 * Once there is no longer any need for reserving a certain TID, this function 5678 * should be called, and no longer will packets have their TID modified for 5679 * preventing use of this TID in the driver. 5680 * 5681 * Note that this function blocks and acquires a lock, so it should be called 5682 * without driver locks held. Also note this function should only be called 5683 * from the driver's @sta_state callback. 5684 * 5685 * @sta: the station 5686 * @tid: the TID to unreserve 5687 */ 5688 void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid); 5689 5690 /** 5691 * ieee80211_tx_dequeue - dequeue a packet from a software tx queue 5692 * 5693 * @hw: pointer as obtained from ieee80211_alloc_hw() 5694 * @txq: pointer obtained from station or virtual interface 5695 * 5696 * Returns the skb if successful, %NULL if no frame was available. 5697 */ 5698 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, 5699 struct ieee80211_txq *txq); 5700 5701 /** 5702 * ieee80211_txq_get_depth - get pending frame/byte count of given txq 5703 * 5704 * The values are not guaranteed to be coherent with regard to each other, i.e. 5705 * txq state can change half-way of this function and the caller may end up 5706 * with "new" frame_cnt and "old" byte_cnt or vice-versa. 5707 * 5708 * @txq: pointer obtained from station or virtual interface 5709 * @frame_cnt: pointer to store frame count 5710 * @byte_cnt: pointer to store byte count 5711 */ 5712 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 5713 unsigned long *frame_cnt, 5714 unsigned long *byte_cnt); 5715 #endif /* MAC80211_H */ 5716