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 * @IEEE80211_TX_CTRL_FAST_XMIT: This frame is going through the fast_xmit path 719 * 720 * These flags are used in tx_info->control.flags. 721 */ 722 enum mac80211_tx_control_flags { 723 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0), 724 IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1), 725 IEEE80211_TX_CTRL_RATE_INJECT = BIT(2), 726 IEEE80211_TX_CTRL_AMSDU = BIT(3), 727 IEEE80211_TX_CTRL_FAST_XMIT = BIT(4), 728 }; 729 730 /* 731 * This definition is used as a mask to clear all temporary flags, which are 732 * set by the tx handlers for each transmission attempt by the mac80211 stack. 733 */ 734 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 735 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 736 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 737 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 738 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 739 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 740 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 741 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 742 743 /** 744 * enum mac80211_rate_control_flags - per-rate flags set by the 745 * Rate Control algorithm. 746 * 747 * These flags are set by the Rate control algorithm for each rate during tx, 748 * in the @flags member of struct ieee80211_tx_rate. 749 * 750 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 751 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 752 * This is set if the current BSS requires ERP protection. 753 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 754 * @IEEE80211_TX_RC_MCS: HT rate. 755 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 756 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 757 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 758 * Greenfield mode. 759 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 760 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 761 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 762 * (80+80 isn't supported yet) 763 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 764 * adjacent 20 MHz channels, if the current channel type is 765 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 766 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 767 */ 768 enum mac80211_rate_control_flags { 769 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 770 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 771 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 772 773 /* rate index is an HT/VHT MCS instead of an index */ 774 IEEE80211_TX_RC_MCS = BIT(3), 775 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 776 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 777 IEEE80211_TX_RC_DUP_DATA = BIT(6), 778 IEEE80211_TX_RC_SHORT_GI = BIT(7), 779 IEEE80211_TX_RC_VHT_MCS = BIT(8), 780 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 781 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 782 }; 783 784 785 /* there are 40 bytes if you don't need the rateset to be kept */ 786 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 787 788 /* if you do need the rateset, then you have less space */ 789 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 790 791 /* maximum number of rate stages */ 792 #define IEEE80211_TX_MAX_RATES 4 793 794 /* maximum number of rate table entries */ 795 #define IEEE80211_TX_RATE_TABLE_SIZE 4 796 797 /** 798 * struct ieee80211_tx_rate - rate selection/status 799 * 800 * @idx: rate index to attempt to send with 801 * @flags: rate control flags (&enum mac80211_rate_control_flags) 802 * @count: number of tries in this rate before going to the next rate 803 * 804 * A value of -1 for @idx indicates an invalid rate and, if used 805 * in an array of retry rates, that no more rates should be tried. 806 * 807 * When used for transmit status reporting, the driver should 808 * always report the rate along with the flags it used. 809 * 810 * &struct ieee80211_tx_info contains an array of these structs 811 * in the control information, and it will be filled by the rate 812 * control algorithm according to what should be sent. For example, 813 * if this array contains, in the format { <idx>, <count> } the 814 * information:: 815 * 816 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 817 * 818 * then this means that the frame should be transmitted 819 * up to twice at rate 3, up to twice at rate 2, and up to four 820 * times at rate 1 if it doesn't get acknowledged. Say it gets 821 * acknowledged by the peer after the fifth attempt, the status 822 * information should then contain:: 823 * 824 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 825 * 826 * since it was transmitted twice at rate 3, twice at rate 2 827 * and once at rate 1 after which we received an acknowledgement. 828 */ 829 struct ieee80211_tx_rate { 830 s8 idx; 831 u16 count:5, 832 flags:11; 833 } __packed; 834 835 #define IEEE80211_MAX_TX_RETRY 31 836 837 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 838 u8 mcs, u8 nss) 839 { 840 WARN_ON(mcs & ~0xF); 841 WARN_ON((nss - 1) & ~0x7); 842 rate->idx = ((nss - 1) << 4) | mcs; 843 } 844 845 static inline u8 846 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 847 { 848 return rate->idx & 0xF; 849 } 850 851 static inline u8 852 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 853 { 854 return (rate->idx >> 4) + 1; 855 } 856 857 /** 858 * struct ieee80211_tx_info - skb transmit information 859 * 860 * This structure is placed in skb->cb for three uses: 861 * (1) mac80211 TX control - mac80211 tells the driver what to do 862 * (2) driver internal use (if applicable) 863 * (3) TX status information - driver tells mac80211 what happened 864 * 865 * @flags: transmit info flags, defined above 866 * @band: the band to transmit on (use for checking for races) 867 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 868 * @ack_frame_id: internal frame ID for TX status, used internally 869 * @control: union for control data 870 * @status: union for status data 871 * @driver_data: array of driver_data pointers 872 * @ampdu_ack_len: number of acked aggregated frames. 873 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 874 * @ampdu_len: number of aggregated frames. 875 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 876 * @ack_signal: signal strength of the ACK frame 877 */ 878 struct ieee80211_tx_info { 879 /* common information */ 880 u32 flags; 881 u8 band; 882 883 u8 hw_queue; 884 885 u16 ack_frame_id; 886 887 union { 888 struct { 889 union { 890 /* rate control */ 891 struct { 892 struct ieee80211_tx_rate rates[ 893 IEEE80211_TX_MAX_RATES]; 894 s8 rts_cts_rate_idx; 895 u8 use_rts:1; 896 u8 use_cts_prot:1; 897 u8 short_preamble:1; 898 u8 skip_table:1; 899 /* 2 bytes free */ 900 }; 901 /* only needed before rate control */ 902 unsigned long jiffies; 903 }; 904 /* NB: vif can be NULL for injected frames */ 905 union { 906 /* NB: vif can be NULL for injected frames */ 907 struct ieee80211_vif *vif; 908 909 /* When packets are enqueued on txq it's easy 910 * to re-construct the vif pointer. There's no 911 * more space in tx_info so it can be used to 912 * store the necessary enqueue time for packet 913 * sojourn time computation. 914 */ 915 codel_time_t enqueue_time; 916 }; 917 struct ieee80211_key_conf *hw_key; 918 u32 flags; 919 /* 4 bytes free */ 920 } control; 921 struct { 922 u64 cookie; 923 } ack; 924 struct { 925 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 926 s32 ack_signal; 927 u8 ampdu_ack_len; 928 u8 ampdu_len; 929 u8 antenna; 930 u16 tx_time; 931 void *status_driver_data[19 / sizeof(void *)]; 932 } status; 933 struct { 934 struct ieee80211_tx_rate driver_rates[ 935 IEEE80211_TX_MAX_RATES]; 936 u8 pad[4]; 937 938 void *rate_driver_data[ 939 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 940 }; 941 void *driver_data[ 942 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 943 }; 944 }; 945 946 /** 947 * struct ieee80211_scan_ies - descriptors for different blocks of IEs 948 * 949 * This structure is used to point to different blocks of IEs in HW scan 950 * and scheduled scan. These blocks contain the IEs passed by userspace 951 * and the ones generated by mac80211. 952 * 953 * @ies: pointers to band specific IEs. 954 * @len: lengths of band_specific IEs. 955 * @common_ies: IEs for all bands (especially vendor specific ones) 956 * @common_ie_len: length of the common_ies 957 */ 958 struct ieee80211_scan_ies { 959 const u8 *ies[NUM_NL80211_BANDS]; 960 size_t len[NUM_NL80211_BANDS]; 961 const u8 *common_ies; 962 size_t common_ie_len; 963 }; 964 965 966 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 967 { 968 return (struct ieee80211_tx_info *)skb->cb; 969 } 970 971 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 972 { 973 return (struct ieee80211_rx_status *)skb->cb; 974 } 975 976 /** 977 * ieee80211_tx_info_clear_status - clear TX status 978 * 979 * @info: The &struct ieee80211_tx_info to be cleared. 980 * 981 * When the driver passes an skb back to mac80211, it must report 982 * a number of things in TX status. This function clears everything 983 * in the TX status but the rate control information (it does clear 984 * the count since you need to fill that in anyway). 985 * 986 * NOTE: You can only use this function if you do NOT use 987 * info->driver_data! Use info->rate_driver_data 988 * instead if you need only the less space that allows. 989 */ 990 static inline void 991 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 992 { 993 int i; 994 995 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 996 offsetof(struct ieee80211_tx_info, control.rates)); 997 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 998 offsetof(struct ieee80211_tx_info, driver_rates)); 999 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 1000 /* clear the rate counts */ 1001 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 1002 info->status.rates[i].count = 0; 1003 1004 BUILD_BUG_ON( 1005 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 1006 memset(&info->status.ampdu_ack_len, 0, 1007 sizeof(struct ieee80211_tx_info) - 1008 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 1009 } 1010 1011 1012 /** 1013 * enum mac80211_rx_flags - receive flags 1014 * 1015 * These flags are used with the @flag member of &struct ieee80211_rx_status. 1016 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 1017 * Use together with %RX_FLAG_MMIC_STRIPPED. 1018 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 1019 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 1020 * verification has been done by the hardware. 1021 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 1022 * If this flag is set, the stack cannot do any replay detection 1023 * hence the driver or hardware will have to do that. 1024 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this 1025 * flag indicates that the PN was verified for replay protection. 1026 * Note that this flag is also currently only supported when a frame 1027 * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set) 1028 * @RX_FLAG_DUP_VALIDATED: The driver should set this flag if it did 1029 * de-duplication by itself. 1030 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 1031 * the frame. 1032 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 1033 * the frame. 1034 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 1035 * field) is valid and contains the time the first symbol of the MPDU 1036 * was received. This is useful in monitor mode and for proper IBSS 1037 * merging. 1038 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 1039 * field) is valid and contains the time the last symbol of the MPDU 1040 * (including FCS) was received. 1041 * @RX_FLAG_MACTIME_PLCP_START: The timestamp passed in the RX status (@mactime 1042 * field) is valid and contains the time the SYNC preamble was received. 1043 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 1044 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 1045 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 1046 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 1047 * @RX_FLAG_SHORT_GI: Short guard interval was used 1048 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 1049 * Valid only for data frames (mainly A-MPDU) 1050 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 1051 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 1052 * to hw.radiotap_mcs_details to advertise that fact 1053 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 1054 * number (@ampdu_reference) must be populated and be a distinct number for 1055 * each A-MPDU 1056 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 1057 * subframes of a single A-MPDU 1058 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 1059 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 1060 * on this subframe 1061 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 1062 * is stored in the @ampdu_delimiter_crc field) 1063 * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was 1064 * done by the hardware 1065 * @RX_FLAG_LDPC: LDPC was used 1066 * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without 1067 * processing it in any regular way. 1068 * This is useful if drivers offload some frames but still want to report 1069 * them for sniffing purposes. 1070 * @RX_FLAG_SKIP_MONITOR: Process and report frame to all interfaces except 1071 * monitor interfaces. 1072 * This is useful if drivers offload some frames but still want to report 1073 * them for sniffing purposes. 1074 * @RX_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3 1075 * @RX_FLAG_10MHZ: 10 MHz (half channel) was used 1076 * @RX_FLAG_5MHZ: 5 MHz (quarter channel) was used 1077 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU 1078 * subframes instead of a one huge frame for performance reasons. 1079 * All, but the last MSDU from an A-MSDU should have this flag set. E.g. 1080 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while 1081 * the 3rd (last) one must not have this flag set. The flag is used to 1082 * deal with retransmission/duplication recovery properly since A-MSDU 1083 * subframes share the same sequence number. Reported subframes can be 1084 * either regular MSDU or singly A-MSDUs. Subframes must not be 1085 * interleaved with other frames. 1086 * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific 1087 * radiotap data in the skb->data (before the frame) as described by 1088 * the &struct ieee80211_vendor_radiotap. 1089 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before. 1090 * This is used for AMSDU subframes which can have the same PN as 1091 * the first subframe. 1092 */ 1093 enum mac80211_rx_flags { 1094 RX_FLAG_MMIC_ERROR = BIT(0), 1095 RX_FLAG_DECRYPTED = BIT(1), 1096 RX_FLAG_MACTIME_PLCP_START = BIT(2), 1097 RX_FLAG_MMIC_STRIPPED = BIT(3), 1098 RX_FLAG_IV_STRIPPED = BIT(4), 1099 RX_FLAG_FAILED_FCS_CRC = BIT(5), 1100 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 1101 RX_FLAG_MACTIME_START = BIT(7), 1102 RX_FLAG_SHORTPRE = BIT(8), 1103 RX_FLAG_HT = BIT(9), 1104 RX_FLAG_40MHZ = BIT(10), 1105 RX_FLAG_SHORT_GI = BIT(11), 1106 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 1107 RX_FLAG_HT_GF = BIT(13), 1108 RX_FLAG_AMPDU_DETAILS = BIT(14), 1109 RX_FLAG_PN_VALIDATED = BIT(15), 1110 RX_FLAG_DUP_VALIDATED = BIT(16), 1111 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 1112 RX_FLAG_AMPDU_IS_LAST = BIT(18), 1113 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 1114 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 1115 RX_FLAG_MACTIME_END = BIT(21), 1116 RX_FLAG_VHT = BIT(22), 1117 RX_FLAG_LDPC = BIT(23), 1118 RX_FLAG_ONLY_MONITOR = BIT(24), 1119 RX_FLAG_SKIP_MONITOR = BIT(25), 1120 RX_FLAG_STBC_MASK = BIT(26) | BIT(27), 1121 RX_FLAG_10MHZ = BIT(28), 1122 RX_FLAG_5MHZ = BIT(29), 1123 RX_FLAG_AMSDU_MORE = BIT(30), 1124 RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(31), 1125 RX_FLAG_MIC_STRIPPED = BIT_ULL(32), 1126 RX_FLAG_ALLOW_SAME_PN = BIT_ULL(33), 1127 }; 1128 1129 #define RX_FLAG_STBC_SHIFT 26 1130 1131 /** 1132 * enum mac80211_rx_vht_flags - receive VHT flags 1133 * 1134 * These flags are used with the @vht_flag member of 1135 * &struct ieee80211_rx_status. 1136 * @RX_VHT_FLAG_80MHZ: 80 MHz was used 1137 * @RX_VHT_FLAG_160MHZ: 160 MHz was used 1138 * @RX_VHT_FLAG_BF: packet was beamformed 1139 */ 1140 1141 enum mac80211_rx_vht_flags { 1142 RX_VHT_FLAG_80MHZ = BIT(0), 1143 RX_VHT_FLAG_160MHZ = BIT(1), 1144 RX_VHT_FLAG_BF = BIT(2), 1145 }; 1146 1147 /** 1148 * struct ieee80211_rx_status - receive status 1149 * 1150 * The low-level driver should provide this information (the subset 1151 * supported by hardware) to the 802.11 code with each received 1152 * frame, in the skb's control buffer (cb). 1153 * 1154 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 1155 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 1156 * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is 1157 * needed only for beacons and probe responses that update the scan cache. 1158 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 1159 * it but can store it and pass it back to the driver for synchronisation 1160 * @band: the active band when this frame was received 1161 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 1162 * This field must be set for management frames, but isn't strictly needed 1163 * for data (other) frames - for those it only affects radiotap reporting. 1164 * @signal: signal strength when receiving this frame, either in dBm, in dB or 1165 * unspecified depending on the hardware capabilities flags 1166 * @IEEE80211_HW_SIGNAL_* 1167 * @chains: bitmask of receive chains for which separate signal strength 1168 * values were filled. 1169 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't 1170 * support dB or unspecified units) 1171 * @antenna: antenna used 1172 * @rate_idx: index of data rate into band's supported rates or MCS index if 1173 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 1174 * @vht_nss: number of streams (VHT only) 1175 * @flag: %RX_FLAG_\* 1176 * @vht_flag: %RX_VHT_FLAG_\* 1177 * @rx_flags: internal RX flags for mac80211 1178 * @ampdu_reference: A-MPDU reference number, must be a different value for 1179 * each A-MPDU but the same for each subframe within one A-MPDU 1180 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 1181 */ 1182 struct ieee80211_rx_status { 1183 u64 mactime; 1184 u64 boottime_ns; 1185 u32 device_timestamp; 1186 u32 ampdu_reference; 1187 u64 flag; 1188 u16 freq; 1189 u8 vht_flag; 1190 u8 rate_idx; 1191 u8 vht_nss; 1192 u8 rx_flags; 1193 u8 band; 1194 u8 antenna; 1195 s8 signal; 1196 u8 chains; 1197 s8 chain_signal[IEEE80211_MAX_CHAINS]; 1198 u8 ampdu_delimiter_crc; 1199 }; 1200 1201 /** 1202 * struct ieee80211_vendor_radiotap - vendor radiotap data information 1203 * @present: presence bitmap for this vendor namespace 1204 * (this could be extended in the future if any vendor needs more 1205 * bits, the radiotap spec does allow for that) 1206 * @align: radiotap vendor namespace alignment. This defines the needed 1207 * alignment for the @data field below, not for the vendor namespace 1208 * description itself (which has a fixed 2-byte alignment) 1209 * Must be a power of two, and be set to at least 1! 1210 * @oui: radiotap vendor namespace OUI 1211 * @subns: radiotap vendor sub namespace 1212 * @len: radiotap vendor sub namespace skip length, if alignment is done 1213 * then that's added to this, i.e. this is only the length of the 1214 * @data field. 1215 * @pad: number of bytes of padding after the @data, this exists so that 1216 * the skb data alignment can be preserved even if the data has odd 1217 * length 1218 * @data: the actual vendor namespace data 1219 * 1220 * This struct, including the vendor data, goes into the skb->data before 1221 * the 802.11 header. It's split up in mac80211 using the align/oui/subns 1222 * data. 1223 */ 1224 struct ieee80211_vendor_radiotap { 1225 u32 present; 1226 u8 align; 1227 u8 oui[3]; 1228 u8 subns; 1229 u8 pad; 1230 u16 len; 1231 u8 data[]; 1232 } __packed; 1233 1234 /** 1235 * enum ieee80211_conf_flags - configuration flags 1236 * 1237 * Flags to define PHY configuration options 1238 * 1239 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 1240 * to determine for example whether to calculate timestamps for packets 1241 * or not, do not use instead of filter flags! 1242 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 1243 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 1244 * meaning that the hardware still wakes up for beacons, is able to 1245 * transmit frames and receive the possible acknowledgment frames. 1246 * Not to be confused with hardware specific wakeup/sleep states, 1247 * driver is responsible for that. See the section "Powersave support" 1248 * for more. 1249 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 1250 * the driver should be prepared to handle configuration requests but 1251 * may turn the device off as much as possible. Typically, this flag will 1252 * be set when an interface is set UP but not associated or scanning, but 1253 * it can also be unset in that case when monitor interfaces are active. 1254 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 1255 * operating channel. 1256 */ 1257 enum ieee80211_conf_flags { 1258 IEEE80211_CONF_MONITOR = (1<<0), 1259 IEEE80211_CONF_PS = (1<<1), 1260 IEEE80211_CONF_IDLE = (1<<2), 1261 IEEE80211_CONF_OFFCHANNEL = (1<<3), 1262 }; 1263 1264 1265 /** 1266 * enum ieee80211_conf_changed - denotes which configuration changed 1267 * 1268 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 1269 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 1270 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 1271 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 1272 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 1273 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 1274 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 1275 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 1276 * Note that this is only valid if channel contexts are not used, 1277 * otherwise each channel context has the number of chains listed. 1278 */ 1279 enum ieee80211_conf_changed { 1280 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 1281 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 1282 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 1283 IEEE80211_CONF_CHANGE_PS = BIT(4), 1284 IEEE80211_CONF_CHANGE_POWER = BIT(5), 1285 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 1286 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 1287 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 1288 }; 1289 1290 /** 1291 * enum ieee80211_smps_mode - spatial multiplexing power save mode 1292 * 1293 * @IEEE80211_SMPS_AUTOMATIC: automatic 1294 * @IEEE80211_SMPS_OFF: off 1295 * @IEEE80211_SMPS_STATIC: static 1296 * @IEEE80211_SMPS_DYNAMIC: dynamic 1297 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 1298 */ 1299 enum ieee80211_smps_mode { 1300 IEEE80211_SMPS_AUTOMATIC, 1301 IEEE80211_SMPS_OFF, 1302 IEEE80211_SMPS_STATIC, 1303 IEEE80211_SMPS_DYNAMIC, 1304 1305 /* keep last */ 1306 IEEE80211_SMPS_NUM_MODES, 1307 }; 1308 1309 /** 1310 * struct ieee80211_conf - configuration of the device 1311 * 1312 * This struct indicates how the driver shall configure the hardware. 1313 * 1314 * @flags: configuration flags defined above 1315 * 1316 * @listen_interval: listen interval in units of beacon interval 1317 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 1318 * in power saving. Power saving will not be enabled until a beacon 1319 * has been received and the DTIM period is known. 1320 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 1321 * powersave documentation below. This variable is valid only when 1322 * the CONF_PS flag is set. 1323 * 1324 * @power_level: requested transmit power (in dBm), backward compatibility 1325 * value only that is set to the minimum of all interfaces 1326 * 1327 * @chandef: the channel definition to tune to 1328 * @radar_enabled: whether radar detection is enabled 1329 * 1330 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 1331 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 1332 * but actually means the number of transmissions not the number of retries 1333 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 1334 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 1335 * number of transmissions not the number of retries 1336 * 1337 * @smps_mode: spatial multiplexing powersave mode; note that 1338 * %IEEE80211_SMPS_STATIC is used when the device is not 1339 * configured for an HT channel. 1340 * Note that this is only valid if channel contexts are not used, 1341 * otherwise each channel context has the number of chains listed. 1342 */ 1343 struct ieee80211_conf { 1344 u32 flags; 1345 int power_level, dynamic_ps_timeout; 1346 1347 u16 listen_interval; 1348 u8 ps_dtim_period; 1349 1350 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1351 1352 struct cfg80211_chan_def chandef; 1353 bool radar_enabled; 1354 enum ieee80211_smps_mode smps_mode; 1355 }; 1356 1357 /** 1358 * struct ieee80211_channel_switch - holds the channel switch data 1359 * 1360 * The information provided in this structure is required for channel switch 1361 * operation. 1362 * 1363 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1364 * Function (TSF) timer when the frame containing the channel switch 1365 * announcement was received. This is simply the rx.mactime parameter 1366 * the driver passed into mac80211. 1367 * @device_timestamp: arbitrary timestamp for the device, this is the 1368 * rx.device_timestamp parameter the driver passed to mac80211. 1369 * @block_tx: Indicates whether transmission must be blocked before the 1370 * scheduled channel switch, as indicated by the AP. 1371 * @chandef: the new channel to switch to 1372 * @count: the number of TBTT's until the channel switch event 1373 */ 1374 struct ieee80211_channel_switch { 1375 u64 timestamp; 1376 u32 device_timestamp; 1377 bool block_tx; 1378 struct cfg80211_chan_def chandef; 1379 u8 count; 1380 }; 1381 1382 /** 1383 * enum ieee80211_vif_flags - virtual interface flags 1384 * 1385 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1386 * on this virtual interface to avoid unnecessary CPU wakeups 1387 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1388 * monitoring on this virtual interface -- i.e. it can monitor 1389 * connection quality related parameters, such as the RSSI level and 1390 * provide notifications if configured trigger levels are reached. 1391 * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this 1392 * interface. This flag should be set during interface addition, 1393 * but may be set/cleared as late as authentication to an AP. It is 1394 * only valid for managed/station mode interfaces. 1395 * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes 1396 * and send P2P_PS notification to the driver if NOA changed, even 1397 * this is not pure P2P vif. 1398 */ 1399 enum ieee80211_vif_flags { 1400 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1401 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1402 IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2), 1403 IEEE80211_VIF_GET_NOA_UPDATE = BIT(3), 1404 }; 1405 1406 /** 1407 * struct ieee80211_vif - per-interface data 1408 * 1409 * Data in this structure is continually present for driver 1410 * use during the life of a virtual interface. 1411 * 1412 * @type: type of this virtual interface 1413 * @bss_conf: BSS configuration for this interface, either our own 1414 * or the BSS we're associated to 1415 * @addr: address of this interface 1416 * @p2p: indicates whether this AP or STA interface is a p2p 1417 * interface, i.e. a GO or p2p-sta respectively 1418 * @csa_active: marks whether a channel switch is going on. Internally it is 1419 * write-protected by sdata_lock and local->mtx so holding either is fine 1420 * for read access. 1421 * @mu_mimo_owner: indicates interface owns MU-MIMO capability 1422 * @driver_flags: flags/capabilities the driver has for this interface, 1423 * these need to be set (or cleared) when the interface is added 1424 * or, if supported by the driver, the interface type is changed 1425 * at runtime, mac80211 will never touch this field 1426 * @hw_queue: hardware queue for each AC 1427 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1428 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1429 * when it is not assigned. This pointer is RCU-protected due to the TX 1430 * path needing to access it; even though the netdev carrier will always 1431 * be off when it is %NULL there can still be races and packets could be 1432 * processed after it switches back to %NULL. 1433 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per 1434 * interface debug files. Note that it will be NULL for the virtual 1435 * monitor interface (if that is requested.) 1436 * @probe_req_reg: probe requests should be reported to mac80211 for this 1437 * interface. 1438 * @drv_priv: data area for driver use, will always be aligned to 1439 * sizeof(void \*). 1440 * @txq: the multicast data TX queue (if driver uses the TXQ abstraction) 1441 */ 1442 struct ieee80211_vif { 1443 enum nl80211_iftype type; 1444 struct ieee80211_bss_conf bss_conf; 1445 u8 addr[ETH_ALEN] __aligned(2); 1446 bool p2p; 1447 bool csa_active; 1448 bool mu_mimo_owner; 1449 1450 u8 cab_queue; 1451 u8 hw_queue[IEEE80211_NUM_ACS]; 1452 1453 struct ieee80211_txq *txq; 1454 1455 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1456 1457 u32 driver_flags; 1458 1459 #ifdef CONFIG_MAC80211_DEBUGFS 1460 struct dentry *debugfs_dir; 1461 #endif 1462 1463 unsigned int probe_req_reg; 1464 1465 /* must be last */ 1466 u8 drv_priv[0] __aligned(sizeof(void *)); 1467 }; 1468 1469 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1470 { 1471 #ifdef CONFIG_MAC80211_MESH 1472 return vif->type == NL80211_IFTYPE_MESH_POINT; 1473 #endif 1474 return false; 1475 } 1476 1477 /** 1478 * wdev_to_ieee80211_vif - return a vif struct from a wdev 1479 * @wdev: the wdev to get the vif for 1480 * 1481 * This can be used by mac80211 drivers with direct cfg80211 APIs 1482 * (like the vendor commands) that get a wdev. 1483 * 1484 * Note that this function may return %NULL if the given wdev isn't 1485 * associated with a vif that the driver knows about (e.g. monitor 1486 * or AP_VLAN interfaces.) 1487 */ 1488 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev); 1489 1490 /** 1491 * ieee80211_vif_to_wdev - return a wdev struct from a vif 1492 * @vif: the vif to get the wdev for 1493 * 1494 * This can be used by mac80211 drivers with direct cfg80211 APIs 1495 * (like the vendor commands) that needs to get the wdev for a vif. 1496 * 1497 * Note that this function may return %NULL if the given wdev isn't 1498 * associated with a vif that the driver knows about (e.g. monitor 1499 * or AP_VLAN interfaces.) 1500 */ 1501 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif); 1502 1503 /** 1504 * enum ieee80211_key_flags - key flags 1505 * 1506 * These flags are used for communication about keys between the driver 1507 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1508 * 1509 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1510 * driver to indicate that it requires IV generation for this 1511 * particular key. Setting this flag does not necessarily mean that SKBs 1512 * will have sufficient tailroom for ICV or MIC. 1513 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1514 * the driver for a TKIP key if it requires Michael MIC 1515 * generation in software. 1516 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1517 * that the key is pairwise rather then a shared key. 1518 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1519 * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames 1520 * (MFP) to be done in software. 1521 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1522 * if space should be prepared for the IV, but the IV 1523 * itself should not be generated. Do not set together with 1524 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does 1525 * not necessarily mean that SKBs will have sufficient tailroom for ICV or 1526 * MIC. 1527 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1528 * management frames. The flag can help drivers that have a hardware 1529 * crypto implementation that doesn't deal with management frames 1530 * properly by allowing them to not upload the keys to hardware and 1531 * fall back to software crypto. Note that this flag deals only with 1532 * RX, if your crypto engine can't deal with TX you can also set the 1533 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1534 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the 1535 * driver for a CCMP/GCMP key to indicate that is requires IV generation 1536 * only for managment frames (MFP). 1537 * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the 1538 * driver for a key to indicate that sufficient tailroom must always 1539 * be reserved for ICV or MIC, even when HW encryption is enabled. 1540 */ 1541 enum ieee80211_key_flags { 1542 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0), 1543 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1), 1544 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2), 1545 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3), 1546 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4), 1547 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5), 1548 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6), 1549 IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7), 1550 }; 1551 1552 /** 1553 * struct ieee80211_key_conf - key information 1554 * 1555 * This key information is given by mac80211 to the driver by 1556 * the set_key() callback in &struct ieee80211_ops. 1557 * 1558 * @hw_key_idx: To be set by the driver, this is the key index the driver 1559 * wants to be given when a frame is transmitted and needs to be 1560 * encrypted in hardware. 1561 * @cipher: The key's cipher suite selector. 1562 * @tx_pn: PN used for TX keys, may be used by the driver as well if it 1563 * needs to do software PN assignment by itself (e.g. due to TSO) 1564 * @flags: key flags, see &enum ieee80211_key_flags. 1565 * @keyidx: the key index (0-3) 1566 * @keylen: key material length 1567 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1568 * data block: 1569 * - Temporal Encryption Key (128 bits) 1570 * - Temporal Authenticator Tx MIC Key (64 bits) 1571 * - Temporal Authenticator Rx MIC Key (64 bits) 1572 * @icv_len: The ICV length for this key type 1573 * @iv_len: The IV length for this key type 1574 */ 1575 struct ieee80211_key_conf { 1576 atomic64_t tx_pn; 1577 u32 cipher; 1578 u8 icv_len; 1579 u8 iv_len; 1580 u8 hw_key_idx; 1581 u8 flags; 1582 s8 keyidx; 1583 u8 keylen; 1584 u8 key[0]; 1585 }; 1586 1587 #define IEEE80211_MAX_PN_LEN 16 1588 1589 #define TKIP_PN_TO_IV16(pn) ((u16)(pn & 0xffff)) 1590 #define TKIP_PN_TO_IV32(pn) ((u32)((pn >> 16) & 0xffffffff)) 1591 1592 /** 1593 * struct ieee80211_key_seq - key sequence counter 1594 * 1595 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 1596 * @ccmp: PN data, most significant byte first (big endian, 1597 * reverse order than in packet) 1598 * @aes_cmac: PN data, most significant byte first (big endian, 1599 * reverse order than in packet) 1600 * @aes_gmac: PN data, most significant byte first (big endian, 1601 * reverse order than in packet) 1602 * @gcmp: PN data, most significant byte first (big endian, 1603 * reverse order than in packet) 1604 * @hw: data for HW-only (e.g. cipher scheme) keys 1605 */ 1606 struct ieee80211_key_seq { 1607 union { 1608 struct { 1609 u32 iv32; 1610 u16 iv16; 1611 } tkip; 1612 struct { 1613 u8 pn[6]; 1614 } ccmp; 1615 struct { 1616 u8 pn[6]; 1617 } aes_cmac; 1618 struct { 1619 u8 pn[6]; 1620 } aes_gmac; 1621 struct { 1622 u8 pn[6]; 1623 } gcmp; 1624 struct { 1625 u8 seq[IEEE80211_MAX_PN_LEN]; 1626 u8 seq_len; 1627 } hw; 1628 }; 1629 }; 1630 1631 /** 1632 * struct ieee80211_cipher_scheme - cipher scheme 1633 * 1634 * This structure contains a cipher scheme information defining 1635 * the secure packet crypto handling. 1636 * 1637 * @cipher: a cipher suite selector 1638 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage 1639 * @hdr_len: a length of a security header used the cipher 1640 * @pn_len: a length of a packet number in the security header 1641 * @pn_off: an offset of pn from the beginning of the security header 1642 * @key_idx_off: an offset of key index byte in the security header 1643 * @key_idx_mask: a bit mask of key_idx bits 1644 * @key_idx_shift: a bit shift needed to get key_idx 1645 * key_idx value calculation: 1646 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift 1647 * @mic_len: a mic length in bytes 1648 */ 1649 struct ieee80211_cipher_scheme { 1650 u32 cipher; 1651 u16 iftype; 1652 u8 hdr_len; 1653 u8 pn_len; 1654 u8 pn_off; 1655 u8 key_idx_off; 1656 u8 key_idx_mask; 1657 u8 key_idx_shift; 1658 u8 mic_len; 1659 }; 1660 1661 /** 1662 * enum set_key_cmd - key command 1663 * 1664 * Used with the set_key() callback in &struct ieee80211_ops, this 1665 * indicates whether a key is being removed or added. 1666 * 1667 * @SET_KEY: a key is set 1668 * @DISABLE_KEY: a key must be disabled 1669 */ 1670 enum set_key_cmd { 1671 SET_KEY, DISABLE_KEY, 1672 }; 1673 1674 /** 1675 * enum ieee80211_sta_state - station state 1676 * 1677 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1678 * this is a special state for add/remove transitions 1679 * @IEEE80211_STA_NONE: station exists without special state 1680 * @IEEE80211_STA_AUTH: station is authenticated 1681 * @IEEE80211_STA_ASSOC: station is associated 1682 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1683 */ 1684 enum ieee80211_sta_state { 1685 /* NOTE: These need to be ordered correctly! */ 1686 IEEE80211_STA_NOTEXIST, 1687 IEEE80211_STA_NONE, 1688 IEEE80211_STA_AUTH, 1689 IEEE80211_STA_ASSOC, 1690 IEEE80211_STA_AUTHORIZED, 1691 }; 1692 1693 /** 1694 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1695 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1696 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1697 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1698 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1699 * (including 80+80 MHz) 1700 * 1701 * Implementation note: 20 must be zero to be initialized 1702 * correctly, the values must be sorted. 1703 */ 1704 enum ieee80211_sta_rx_bandwidth { 1705 IEEE80211_STA_RX_BW_20 = 0, 1706 IEEE80211_STA_RX_BW_40, 1707 IEEE80211_STA_RX_BW_80, 1708 IEEE80211_STA_RX_BW_160, 1709 }; 1710 1711 /** 1712 * struct ieee80211_sta_rates - station rate selection table 1713 * 1714 * @rcu_head: RCU head used for freeing the table on update 1715 * @rate: transmit rates/flags to be used by default. 1716 * Overriding entries per-packet is possible by using cb tx control. 1717 */ 1718 struct ieee80211_sta_rates { 1719 struct rcu_head rcu_head; 1720 struct { 1721 s8 idx; 1722 u8 count; 1723 u8 count_cts; 1724 u8 count_rts; 1725 u16 flags; 1726 } rate[IEEE80211_TX_RATE_TABLE_SIZE]; 1727 }; 1728 1729 /** 1730 * struct ieee80211_sta - station table entry 1731 * 1732 * A station table entry represents a station we are possibly 1733 * communicating with. Since stations are RCU-managed in 1734 * mac80211, any ieee80211_sta pointer you get access to must 1735 * either be protected by rcu_read_lock() explicitly or implicitly, 1736 * or you must take good care to not use such a pointer after a 1737 * call to your sta_remove callback that removed it. 1738 * 1739 * @addr: MAC address 1740 * @aid: AID we assigned to the station if we're an AP 1741 * @supp_rates: Bitmap of supported rates (per band) 1742 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities 1743 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities 1744 * @max_rx_aggregation_subframes: maximal amount of frames in a single AMPDU 1745 * that this station is allowed to transmit to us. 1746 * Can be modified by driver. 1747 * @wme: indicates whether the STA supports QoS/WME (if local devices does, 1748 * otherwise always false) 1749 * @drv_priv: data area for driver use, will always be aligned to 1750 * sizeof(void \*), size is determined in hw information. 1751 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1752 * if wme is supported. The bits order is like in 1753 * IEEE80211_WMM_IE_STA_QOSINFO_AC_*. 1754 * @max_sp: max Service Period. Only valid if wme is supported. 1755 * @bandwidth: current bandwidth the station can receive with 1756 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1757 * station can receive at the moment, changed by operating mode 1758 * notifications and capabilities. The value is only valid after 1759 * the station moves to associated state. 1760 * @smps_mode: current SMPS mode (off, static or dynamic) 1761 * @rates: rate control selection table 1762 * @tdls: indicates whether the STA is a TDLS peer 1763 * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only 1764 * valid if the STA is a TDLS peer in the first place. 1765 * @mfp: indicates whether the STA uses management frame protection or not. 1766 * @max_amsdu_subframes: indicates the maximal number of MSDUs in a single 1767 * A-MSDU. Taken from the Extended Capabilities element. 0 means 1768 * unlimited. 1769 * @max_amsdu_len: indicates the maximal length of an A-MSDU in bytes. This 1770 * field is always valid for packets with a VHT preamble. For packets 1771 * with a HT preamble, additional limits apply: 1772 * + If the skb is transmitted as part of a BA agreement, the 1773 * A-MSDU maximal size is min(max_amsdu_len, 4065) bytes. 1774 * + If the skb is not part of a BA aggreement, the A-MSDU maximal 1775 * size is min(max_amsdu_len, 7935) bytes. 1776 * Both additional HT limits must be enforced by the low level driver. 1777 * This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2). 1778 * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not. 1779 * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control. 1780 * @txq: per-TID data TX queues (if driver uses the TXQ abstraction) 1781 */ 1782 struct ieee80211_sta { 1783 u32 supp_rates[NUM_NL80211_BANDS]; 1784 u8 addr[ETH_ALEN]; 1785 u16 aid; 1786 struct ieee80211_sta_ht_cap ht_cap; 1787 struct ieee80211_sta_vht_cap vht_cap; 1788 u8 max_rx_aggregation_subframes; 1789 bool wme; 1790 u8 uapsd_queues; 1791 u8 max_sp; 1792 u8 rx_nss; 1793 enum ieee80211_sta_rx_bandwidth bandwidth; 1794 enum ieee80211_smps_mode smps_mode; 1795 struct ieee80211_sta_rates __rcu *rates; 1796 bool tdls; 1797 bool tdls_initiator; 1798 bool mfp; 1799 u8 max_amsdu_subframes; 1800 u16 max_amsdu_len; 1801 bool support_p2p_ps; 1802 u16 max_rc_amsdu_len; 1803 1804 struct ieee80211_txq *txq[IEEE80211_NUM_TIDS]; 1805 1806 /* must be last */ 1807 u8 drv_priv[0] __aligned(sizeof(void *)); 1808 }; 1809 1810 /** 1811 * enum sta_notify_cmd - sta notify command 1812 * 1813 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1814 * indicates if an associated station made a power state transition. 1815 * 1816 * @STA_NOTIFY_SLEEP: a station is now sleeping 1817 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1818 */ 1819 enum sta_notify_cmd { 1820 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1821 }; 1822 1823 /** 1824 * struct ieee80211_tx_control - TX control data 1825 * 1826 * @sta: station table entry, this sta pointer may be NULL and 1827 * it is not allowed to copy the pointer, due to RCU. 1828 */ 1829 struct ieee80211_tx_control { 1830 struct ieee80211_sta *sta; 1831 }; 1832 1833 /** 1834 * struct ieee80211_txq - Software intermediate tx queue 1835 * 1836 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 1837 * @sta: station table entry, %NULL for per-vif queue 1838 * @tid: the TID for this queue (unused for per-vif queue) 1839 * @ac: the AC for this queue 1840 * @drv_priv: driver private area, sized by hw->txq_data_size 1841 * 1842 * The driver can obtain packets from this queue by calling 1843 * ieee80211_tx_dequeue(). 1844 */ 1845 struct ieee80211_txq { 1846 struct ieee80211_vif *vif; 1847 struct ieee80211_sta *sta; 1848 u8 tid; 1849 u8 ac; 1850 1851 /* must be last */ 1852 u8 drv_priv[0] __aligned(sizeof(void *)); 1853 }; 1854 1855 /** 1856 * enum ieee80211_hw_flags - hardware flags 1857 * 1858 * These flags are used to indicate hardware capabilities to 1859 * the stack. Generally, flags here should have their meaning 1860 * done in a way that the simplest hardware doesn't need setting 1861 * any particular flags. There are some exceptions to this rule, 1862 * however, so you are advised to review these flags carefully. 1863 * 1864 * @IEEE80211_HW_HAS_RATE_CONTROL: 1865 * The hardware or firmware includes rate control, and cannot be 1866 * controlled by the stack. As such, no rate control algorithm 1867 * should be instantiated, and the TX rate reported to userspace 1868 * will be taken from the TX status instead of the rate control 1869 * algorithm. 1870 * Note that this requires that the driver implement a number of 1871 * callbacks so it has the correct information, it needs to have 1872 * the @set_rts_threshold callback and must look at the BSS config 1873 * @use_cts_prot for G/N protection, @use_short_slot for slot 1874 * timing in 2.4 GHz and @use_short_preamble for preambles for 1875 * CCK frames. 1876 * 1877 * @IEEE80211_HW_RX_INCLUDES_FCS: 1878 * Indicates that received frames passed to the stack include 1879 * the FCS at the end. 1880 * 1881 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1882 * Some wireless LAN chipsets buffer broadcast/multicast frames 1883 * for power saving stations in the hardware/firmware and others 1884 * rely on the host system for such buffering. This option is used 1885 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1886 * multicast frames when there are power saving stations so that 1887 * the driver can fetch them with ieee80211_get_buffered_bc(). 1888 * 1889 * @IEEE80211_HW_SIGNAL_UNSPEC: 1890 * Hardware can provide signal values but we don't know its units. We 1891 * expect values between 0 and @max_signal. 1892 * If possible please provide dB or dBm instead. 1893 * 1894 * @IEEE80211_HW_SIGNAL_DBM: 1895 * Hardware gives signal values in dBm, decibel difference from 1896 * one milliwatt. This is the preferred method since it is standardized 1897 * between different devices. @max_signal does not need to be set. 1898 * 1899 * @IEEE80211_HW_SPECTRUM_MGMT: 1900 * Hardware supports spectrum management defined in 802.11h 1901 * Measurement, Channel Switch, Quieting, TPC 1902 * 1903 * @IEEE80211_HW_AMPDU_AGGREGATION: 1904 * Hardware supports 11n A-MPDU aggregation. 1905 * 1906 * @IEEE80211_HW_SUPPORTS_PS: 1907 * Hardware has power save support (i.e. can go to sleep). 1908 * 1909 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1910 * Hardware requires nullfunc frame handling in stack, implies 1911 * stack support for dynamic PS. 1912 * 1913 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1914 * Hardware has support for dynamic PS. 1915 * 1916 * @IEEE80211_HW_MFP_CAPABLE: 1917 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1918 * 1919 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1920 * Hardware can provide ack status reports of Tx frames to 1921 * the stack. 1922 * 1923 * @IEEE80211_HW_CONNECTION_MONITOR: 1924 * The hardware performs its own connection monitoring, including 1925 * periodic keep-alives to the AP and probing the AP on beacon loss. 1926 * 1927 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1928 * This device needs to get data from beacon before association (i.e. 1929 * dtim_period). 1930 * 1931 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1932 * per-station GTKs as used by IBSS RSN or during fast transition. If 1933 * the device doesn't support per-station GTKs, but can be asked not 1934 * to decrypt group addressed frames, then IBSS RSN support is still 1935 * possible but software crypto will be used. Advertise the wiphy flag 1936 * only in that case. 1937 * 1938 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1939 * autonomously manages the PS status of connected stations. When 1940 * this flag is set mac80211 will not trigger PS mode for connected 1941 * stations based on the PM bit of incoming frames. 1942 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1943 * the PS mode of connected stations. 1944 * 1945 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1946 * setup strictly in HW. mac80211 should not attempt to do this in 1947 * software. 1948 * 1949 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1950 * a virtual monitor interface when monitor interfaces are the only 1951 * active interfaces. 1952 * 1953 * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to 1954 * be created. It is expected user-space will create vifs as 1955 * desired (and thus have them named as desired). 1956 * 1957 * @IEEE80211_HW_SW_CRYPTO_CONTROL: The driver wants to control which of the 1958 * crypto algorithms can be done in software - so don't automatically 1959 * try to fall back to it if hardware crypto fails, but do so only if 1960 * the driver returns 1. This also forces the driver to advertise its 1961 * supported cipher suites. 1962 * 1963 * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit, 1964 * this currently requires only the ability to calculate the duration 1965 * for frames. 1966 * 1967 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1968 * queue mapping in order to use different queues (not just one per AC) 1969 * for different virtual interfaces. See the doc section on HW queue 1970 * control for more details. 1971 * 1972 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate 1973 * selection table provided by the rate control algorithm. 1974 * 1975 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1976 * P2P Interface. This will be honoured even if more than one interface 1977 * is supported. 1978 * 1979 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1980 * only, to allow getting TBTT of a DTIM beacon. 1981 * 1982 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates 1983 * and can cope with CCK rates in an aggregation session (e.g. by not 1984 * using aggregation for such frames.) 1985 * 1986 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA) 1987 * for a single active channel while using channel contexts. When support 1988 * is not enabled the default action is to disconnect when getting the 1989 * CSA frame. 1990 * 1991 * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload 1992 * or tailroom of TX skbs without copying them first. 1993 * 1994 * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands 1995 * in one command, mac80211 doesn't have to run separate scans per band. 1996 * 1997 * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth 1998 * than then BSS bandwidth for a TDLS link on the base channel. 1999 * 2000 * @IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU: The driver supports receiving A-MSDUs 2001 * within A-MPDU. 2002 * 2003 * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status 2004 * for sent beacons. 2005 * 2006 * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each 2007 * station has a unique address, i.e. each station entry can be identified 2008 * by just its MAC address; this prevents, for example, the same station 2009 * from connecting to two virtual AP interfaces at the same time. 2010 * 2011 * @IEEE80211_HW_SUPPORTS_REORDERING_BUFFER: Hardware (or driver) manages the 2012 * reordering buffer internally, guaranteeing mac80211 receives frames in 2013 * order and does not need to manage its own reorder buffer or BA session 2014 * timeout. 2015 * 2016 * @IEEE80211_HW_USES_RSS: The device uses RSS and thus requires parallel RX, 2017 * which implies using per-CPU station statistics. 2018 * 2019 * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated 2020 * A-MSDU frames. Requires software tx queueing and fast-xmit support. 2021 * When not using minstrel/minstrel_ht rate control, the driver must 2022 * limit the maximum A-MSDU size based on the current tx rate by setting 2023 * max_rc_amsdu_len in struct ieee80211_sta. 2024 * 2025 * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list 2026 * skbs, needed for zero-copy software A-MSDU. 2027 * 2028 * @IEEE80211_HW_REPORTS_LOW_ACK: The driver (or firmware) reports low ack event 2029 * by ieee80211_report_low_ack() based on its own algorithm. For such 2030 * drivers, mac80211 packet loss mechanism will not be triggered and driver 2031 * is completely depending on firmware event for station kickout. 2032 * 2033 * @IEEE80211_HW_SUPPORTS_TX_FRAG: Hardware does fragmentation by itself. 2034 * The stack will not do fragmentation. 2035 * The callback for @set_frag_threshold should be set as well. 2036 * 2037 * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays 2038 */ 2039 enum ieee80211_hw_flags { 2040 IEEE80211_HW_HAS_RATE_CONTROL, 2041 IEEE80211_HW_RX_INCLUDES_FCS, 2042 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING, 2043 IEEE80211_HW_SIGNAL_UNSPEC, 2044 IEEE80211_HW_SIGNAL_DBM, 2045 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC, 2046 IEEE80211_HW_SPECTRUM_MGMT, 2047 IEEE80211_HW_AMPDU_AGGREGATION, 2048 IEEE80211_HW_SUPPORTS_PS, 2049 IEEE80211_HW_PS_NULLFUNC_STACK, 2050 IEEE80211_HW_SUPPORTS_DYNAMIC_PS, 2051 IEEE80211_HW_MFP_CAPABLE, 2052 IEEE80211_HW_WANT_MONITOR_VIF, 2053 IEEE80211_HW_NO_AUTO_VIF, 2054 IEEE80211_HW_SW_CRYPTO_CONTROL, 2055 IEEE80211_HW_SUPPORT_FAST_XMIT, 2056 IEEE80211_HW_REPORTS_TX_ACK_STATUS, 2057 IEEE80211_HW_CONNECTION_MONITOR, 2058 IEEE80211_HW_QUEUE_CONTROL, 2059 IEEE80211_HW_SUPPORTS_PER_STA_GTK, 2060 IEEE80211_HW_AP_LINK_PS, 2061 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW, 2062 IEEE80211_HW_SUPPORTS_RC_TABLE, 2063 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF, 2064 IEEE80211_HW_TIMING_BEACON_ONLY, 2065 IEEE80211_HW_SUPPORTS_HT_CCK_RATES, 2066 IEEE80211_HW_CHANCTX_STA_CSA, 2067 IEEE80211_HW_SUPPORTS_CLONED_SKBS, 2068 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS, 2069 IEEE80211_HW_TDLS_WIDER_BW, 2070 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU, 2071 IEEE80211_HW_BEACON_TX_STATUS, 2072 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR, 2073 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER, 2074 IEEE80211_HW_USES_RSS, 2075 IEEE80211_HW_TX_AMSDU, 2076 IEEE80211_HW_TX_FRAG_LIST, 2077 IEEE80211_HW_REPORTS_LOW_ACK, 2078 IEEE80211_HW_SUPPORTS_TX_FRAG, 2079 2080 /* keep last, obviously */ 2081 NUM_IEEE80211_HW_FLAGS 2082 }; 2083 2084 /** 2085 * struct ieee80211_hw - hardware information and state 2086 * 2087 * This structure contains the configuration and hardware 2088 * information for an 802.11 PHY. 2089 * 2090 * @wiphy: This points to the &struct wiphy allocated for this 2091 * 802.11 PHY. You must fill in the @perm_addr and @dev 2092 * members of this structure using SET_IEEE80211_DEV() 2093 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 2094 * bands (with channels, bitrates) are registered here. 2095 * 2096 * @conf: &struct ieee80211_conf, device configuration, don't use. 2097 * 2098 * @priv: pointer to private area that was allocated for driver use 2099 * along with this structure. 2100 * 2101 * @flags: hardware flags, see &enum ieee80211_hw_flags. 2102 * 2103 * @extra_tx_headroom: headroom to reserve in each transmit skb 2104 * for use by the driver (e.g. for transmit headers.) 2105 * 2106 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb. 2107 * Can be used by drivers to add extra IEs. 2108 * 2109 * @max_signal: Maximum value for signal (rssi) in RX information, used 2110 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 2111 * 2112 * @max_listen_interval: max listen interval in units of beacon interval 2113 * that HW supports 2114 * 2115 * @queues: number of available hardware transmit queues for 2116 * data packets. WMM/QoS requires at least four, these 2117 * queues need to have configurable access parameters. 2118 * 2119 * @rate_control_algorithm: rate control algorithm for this hardware. 2120 * If unset (NULL), the default algorithm will be used. Must be 2121 * set before calling ieee80211_register_hw(). 2122 * 2123 * @vif_data_size: size (in bytes) of the drv_priv data area 2124 * within &struct ieee80211_vif. 2125 * @sta_data_size: size (in bytes) of the drv_priv data area 2126 * within &struct ieee80211_sta. 2127 * @chanctx_data_size: size (in bytes) of the drv_priv data area 2128 * within &struct ieee80211_chanctx_conf. 2129 * @txq_data_size: size (in bytes) of the drv_priv data area 2130 * within @struct ieee80211_txq. 2131 * 2132 * @max_rates: maximum number of alternate rate retry stages the hw 2133 * can handle. 2134 * @max_report_rates: maximum number of alternate rate retry stages 2135 * the hw can report back. 2136 * @max_rate_tries: maximum number of tries for each stage 2137 * 2138 * @max_rx_aggregation_subframes: maximum buffer size (number of 2139 * sub-frames) to be used for A-MPDU block ack receiver 2140 * aggregation. 2141 * This is only relevant if the device has restrictions on the 2142 * number of subframes, if it relies on mac80211 to do reordering 2143 * it shouldn't be set. 2144 * 2145 * @max_tx_aggregation_subframes: maximum number of subframes in an 2146 * aggregate an HT driver will transmit. Though ADDBA will advertise 2147 * a constant value of 64 as some older APs can crash if the window 2148 * size is smaller (an example is LinkSys WRT120N with FW v1.0.07 2149 * build 002 Jun 18 2012). 2150 * 2151 * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum 2152 * of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list. 2153 * 2154 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 2155 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 2156 * 2157 * @radiotap_mcs_details: lists which MCS information can the HW 2158 * reports, by default it is set to _MCS, _GI and _BW but doesn't 2159 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_\* values, only 2160 * adding _BW is supported today. 2161 * 2162 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 2163 * the default is _GI | _BANDWIDTH. 2164 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_\* values. 2165 * 2166 * @radiotap_timestamp: Information for the radiotap timestamp field; if the 2167 * 'units_pos' member is set to a non-negative value it must be set to 2168 * a combination of a IEEE80211_RADIOTAP_TIMESTAMP_UNIT_* and a 2169 * IEEE80211_RADIOTAP_TIMESTAMP_SPOS_* value, and then the timestamp 2170 * field will be added and populated from the &struct ieee80211_rx_status 2171 * device_timestamp. If the 'accuracy' member is non-negative, it's put 2172 * into the accuracy radiotap field and the accuracy known flag is set. 2173 * 2174 * @netdev_features: netdev features to be set in each netdev created 2175 * from this HW. Note that not all features are usable with mac80211, 2176 * other features will be rejected during HW registration. 2177 * 2178 * @uapsd_queues: This bitmap is included in (re)association frame to indicate 2179 * for each access category if it is uAPSD trigger-enabled and delivery- 2180 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. 2181 * Each bit corresponds to different AC. Value '1' in specific bit means 2182 * that corresponding AC is both trigger- and delivery-enabled. '0' means 2183 * neither enabled. 2184 * 2185 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may 2186 * deliver to a WMM STA during any Service Period triggered by the WMM STA. 2187 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values. 2188 * 2189 * @n_cipher_schemes: a size of an array of cipher schemes definitions. 2190 * @cipher_schemes: a pointer to an array of cipher scheme definitions 2191 * supported by HW. 2192 * @max_nan_de_entries: maximum number of NAN DE functions supported by the 2193 * device. 2194 */ 2195 struct ieee80211_hw { 2196 struct ieee80211_conf conf; 2197 struct wiphy *wiphy; 2198 const char *rate_control_algorithm; 2199 void *priv; 2200 unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)]; 2201 unsigned int extra_tx_headroom; 2202 unsigned int extra_beacon_tailroom; 2203 int vif_data_size; 2204 int sta_data_size; 2205 int chanctx_data_size; 2206 int txq_data_size; 2207 u16 queues; 2208 u16 max_listen_interval; 2209 s8 max_signal; 2210 u8 max_rates; 2211 u8 max_report_rates; 2212 u8 max_rate_tries; 2213 u8 max_rx_aggregation_subframes; 2214 u8 max_tx_aggregation_subframes; 2215 u8 max_tx_fragments; 2216 u8 offchannel_tx_hw_queue; 2217 u8 radiotap_mcs_details; 2218 u16 radiotap_vht_details; 2219 struct { 2220 int units_pos; 2221 s16 accuracy; 2222 } radiotap_timestamp; 2223 netdev_features_t netdev_features; 2224 u8 uapsd_queues; 2225 u8 uapsd_max_sp_len; 2226 u8 n_cipher_schemes; 2227 const struct ieee80211_cipher_scheme *cipher_schemes; 2228 u8 max_nan_de_entries; 2229 }; 2230 2231 static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw, 2232 enum ieee80211_hw_flags flg) 2233 { 2234 return test_bit(flg, hw->flags); 2235 } 2236 #define ieee80211_hw_check(hw, flg) _ieee80211_hw_check(hw, IEEE80211_HW_##flg) 2237 2238 static inline void _ieee80211_hw_set(struct ieee80211_hw *hw, 2239 enum ieee80211_hw_flags flg) 2240 { 2241 return __set_bit(flg, hw->flags); 2242 } 2243 #define ieee80211_hw_set(hw, flg) _ieee80211_hw_set(hw, IEEE80211_HW_##flg) 2244 2245 /** 2246 * struct ieee80211_scan_request - hw scan request 2247 * 2248 * @ies: pointers different parts of IEs (in req.ie) 2249 * @req: cfg80211 request. 2250 */ 2251 struct ieee80211_scan_request { 2252 struct ieee80211_scan_ies ies; 2253 2254 /* Keep last */ 2255 struct cfg80211_scan_request req; 2256 }; 2257 2258 /** 2259 * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters 2260 * 2261 * @sta: peer this TDLS channel-switch request/response came from 2262 * @chandef: channel referenced in a TDLS channel-switch request 2263 * @action_code: see &enum ieee80211_tdls_actioncode 2264 * @status: channel-switch response status 2265 * @timestamp: time at which the frame was received 2266 * @switch_time: switch-timing parameter received in the frame 2267 * @switch_timeout: switch-timing parameter received in the frame 2268 * @tmpl_skb: TDLS switch-channel response template 2269 * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb 2270 */ 2271 struct ieee80211_tdls_ch_sw_params { 2272 struct ieee80211_sta *sta; 2273 struct cfg80211_chan_def *chandef; 2274 u8 action_code; 2275 u32 status; 2276 u32 timestamp; 2277 u16 switch_time; 2278 u16 switch_timeout; 2279 struct sk_buff *tmpl_skb; 2280 u32 ch_sw_tm_ie; 2281 }; 2282 2283 /** 2284 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 2285 * 2286 * @wiphy: the &struct wiphy which we want to query 2287 * 2288 * mac80211 drivers can use this to get to their respective 2289 * &struct ieee80211_hw. Drivers wishing to get to their own private 2290 * structure can then access it via hw->priv. Note that mac802111 drivers should 2291 * not use wiphy_priv() to try to get their private driver structure as this 2292 * is already used internally by mac80211. 2293 * 2294 * Return: The mac80211 driver hw struct of @wiphy. 2295 */ 2296 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 2297 2298 /** 2299 * SET_IEEE80211_DEV - set device for 802.11 hardware 2300 * 2301 * @hw: the &struct ieee80211_hw to set the device for 2302 * @dev: the &struct device of this 802.11 device 2303 */ 2304 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 2305 { 2306 set_wiphy_dev(hw->wiphy, dev); 2307 } 2308 2309 /** 2310 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 2311 * 2312 * @hw: the &struct ieee80211_hw to set the MAC address for 2313 * @addr: the address to set 2314 */ 2315 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, const u8 *addr) 2316 { 2317 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 2318 } 2319 2320 static inline struct ieee80211_rate * 2321 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 2322 const struct ieee80211_tx_info *c) 2323 { 2324 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 2325 return NULL; 2326 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 2327 } 2328 2329 static inline struct ieee80211_rate * 2330 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 2331 const struct ieee80211_tx_info *c) 2332 { 2333 if (c->control.rts_cts_rate_idx < 0) 2334 return NULL; 2335 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 2336 } 2337 2338 static inline struct ieee80211_rate * 2339 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 2340 const struct ieee80211_tx_info *c, int idx) 2341 { 2342 if (c->control.rates[idx + 1].idx < 0) 2343 return NULL; 2344 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 2345 } 2346 2347 /** 2348 * ieee80211_free_txskb - free TX skb 2349 * @hw: the hardware 2350 * @skb: the skb 2351 * 2352 * Free a transmit skb. Use this funtion when some failure 2353 * to transmit happened and thus status cannot be reported. 2354 */ 2355 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 2356 2357 /** 2358 * DOC: Hardware crypto acceleration 2359 * 2360 * mac80211 is capable of taking advantage of many hardware 2361 * acceleration designs for encryption and decryption operations. 2362 * 2363 * The set_key() callback in the &struct ieee80211_ops for a given 2364 * device is called to enable hardware acceleration of encryption and 2365 * decryption. The callback takes a @sta parameter that will be NULL 2366 * for default keys or keys used for transmission only, or point to 2367 * the station information for the peer for individual keys. 2368 * Multiple transmission keys with the same key index may be used when 2369 * VLANs are configured for an access point. 2370 * 2371 * When transmitting, the TX control data will use the @hw_key_idx 2372 * selected by the driver by modifying the &struct ieee80211_key_conf 2373 * pointed to by the @key parameter to the set_key() function. 2374 * 2375 * The set_key() call for the %SET_KEY command should return 0 if 2376 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 2377 * added; if you return 0 then hw_key_idx must be assigned to the 2378 * hardware key index, you are free to use the full u8 range. 2379 * 2380 * Note that in the case that the @IEEE80211_HW_SW_CRYPTO_CONTROL flag is 2381 * set, mac80211 will not automatically fall back to software crypto if 2382 * enabling hardware crypto failed. The set_key() call may also return the 2383 * value 1 to permit this specific key/algorithm to be done in software. 2384 * 2385 * When the cmd is %DISABLE_KEY then it must succeed. 2386 * 2387 * Note that it is permissible to not decrypt a frame even if a key 2388 * for it has been uploaded to hardware, the stack will not make any 2389 * decision based on whether a key has been uploaded or not but rather 2390 * based on the receive flags. 2391 * 2392 * The &struct ieee80211_key_conf structure pointed to by the @key 2393 * parameter is guaranteed to be valid until another call to set_key() 2394 * removes it, but it can only be used as a cookie to differentiate 2395 * keys. 2396 * 2397 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 2398 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 2399 * handler. 2400 * The update_tkip_key() call updates the driver with the new phase 1 key. 2401 * This happens every time the iv16 wraps around (every 65536 packets). The 2402 * set_key() call will happen only once for each key (unless the AP did 2403 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 2404 * provided by update_tkip_key only. The trigger that makes mac80211 call this 2405 * handler is software decryption with wrap around of iv16. 2406 * 2407 * The set_default_unicast_key() call updates the default WEP key index 2408 * configured to the hardware for WEP encryption type. This is required 2409 * for devices that support offload of data packets (e.g. ARP responses). 2410 */ 2411 2412 /** 2413 * DOC: Powersave support 2414 * 2415 * mac80211 has support for various powersave implementations. 2416 * 2417 * First, it can support hardware that handles all powersaving by itself, 2418 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 2419 * flag. In that case, it will be told about the desired powersave mode 2420 * with the %IEEE80211_CONF_PS flag depending on the association status. 2421 * The hardware must take care of sending nullfunc frames when necessary, 2422 * i.e. when entering and leaving powersave mode. The hardware is required 2423 * to look at the AID in beacons and signal to the AP that it woke up when 2424 * it finds traffic directed to it. 2425 * 2426 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 2427 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 2428 * with hardware wakeup and sleep states. Driver is responsible for waking 2429 * up the hardware before issuing commands to the hardware and putting it 2430 * back to sleep at appropriate times. 2431 * 2432 * When PS is enabled, hardware needs to wakeup for beacons and receive the 2433 * buffered multicast/broadcast frames after the beacon. Also it must be 2434 * possible to send frames and receive the acknowledment frame. 2435 * 2436 * Other hardware designs cannot send nullfunc frames by themselves and also 2437 * need software support for parsing the TIM bitmap. This is also supported 2438 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 2439 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 2440 * required to pass up beacons. The hardware is still required to handle 2441 * waking up for multicast traffic; if it cannot the driver must handle that 2442 * as best as it can, mac80211 is too slow to do that. 2443 * 2444 * Dynamic powersave is an extension to normal powersave in which the 2445 * hardware stays awake for a user-specified period of time after sending a 2446 * frame so that reply frames need not be buffered and therefore delayed to 2447 * the next wakeup. It's compromise of getting good enough latency when 2448 * there's data traffic and still saving significantly power in idle 2449 * periods. 2450 * 2451 * Dynamic powersave is simply supported by mac80211 enabling and disabling 2452 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 2453 * flag and mac80211 will handle everything automatically. Additionally, 2454 * hardware having support for the dynamic PS feature may set the 2455 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 2456 * dynamic PS mode itself. The driver needs to look at the 2457 * @dynamic_ps_timeout hardware configuration value and use it that value 2458 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 2459 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 2460 * enabled whenever user has enabled powersave. 2461 * 2462 * Driver informs U-APSD client support by enabling 2463 * %IEEE80211_VIF_SUPPORTS_UAPSD flag. The mode is configured through the 2464 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS 2465 * Nullfunc frames and stay awake until the service period has ended. To 2466 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 2467 * from that AC are transmitted with powersave enabled. 2468 * 2469 * Note: U-APSD client mode is not yet supported with 2470 * %IEEE80211_HW_PS_NULLFUNC_STACK. 2471 */ 2472 2473 /** 2474 * DOC: Beacon filter support 2475 * 2476 * Some hardware have beacon filter support to reduce host cpu wakeups 2477 * which will reduce system power consumption. It usually works so that 2478 * the firmware creates a checksum of the beacon but omits all constantly 2479 * changing elements (TSF, TIM etc). Whenever the checksum changes the 2480 * beacon is forwarded to the host, otherwise it will be just dropped. That 2481 * way the host will only receive beacons where some relevant information 2482 * (for example ERP protection or WMM settings) have changed. 2483 * 2484 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 2485 * interface capability. The driver needs to enable beacon filter support 2486 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 2487 * power save is enabled, the stack will not check for beacon loss and the 2488 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 2489 * 2490 * The time (or number of beacons missed) until the firmware notifies the 2491 * driver of a beacon loss event (which in turn causes the driver to call 2492 * ieee80211_beacon_loss()) should be configurable and will be controlled 2493 * by mac80211 and the roaming algorithm in the future. 2494 * 2495 * Since there may be constantly changing information elements that nothing 2496 * in the software stack cares about, we will, in the future, have mac80211 2497 * tell the driver which information elements are interesting in the sense 2498 * that we want to see changes in them. This will include 2499 * 2500 * - a list of information element IDs 2501 * - a list of OUIs for the vendor information element 2502 * 2503 * Ideally, the hardware would filter out any beacons without changes in the 2504 * requested elements, but if it cannot support that it may, at the expense 2505 * of some efficiency, filter out only a subset. For example, if the device 2506 * doesn't support checking for OUIs it should pass up all changes in all 2507 * vendor information elements. 2508 * 2509 * Note that change, for the sake of simplification, also includes information 2510 * elements appearing or disappearing from the beacon. 2511 * 2512 * Some hardware supports an "ignore list" instead, just make sure nothing 2513 * that was requested is on the ignore list, and include commonly changing 2514 * information element IDs in the ignore list, for example 11 (BSS load) and 2515 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 2516 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 2517 * it could also include some currently unused IDs. 2518 * 2519 * 2520 * In addition to these capabilities, hardware should support notifying the 2521 * host of changes in the beacon RSSI. This is relevant to implement roaming 2522 * when no traffic is flowing (when traffic is flowing we see the RSSI of 2523 * the received data packets). This can consist in notifying the host when 2524 * the RSSI changes significantly or when it drops below or rises above 2525 * configurable thresholds. In the future these thresholds will also be 2526 * configured by mac80211 (which gets them from userspace) to implement 2527 * them as the roaming algorithm requires. 2528 * 2529 * If the hardware cannot implement this, the driver should ask it to 2530 * periodically pass beacon frames to the host so that software can do the 2531 * signal strength threshold checking. 2532 */ 2533 2534 /** 2535 * DOC: Spatial multiplexing power save 2536 * 2537 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 2538 * power in an 802.11n implementation. For details on the mechanism 2539 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 2540 * "11.2.3 SM power save". 2541 * 2542 * The mac80211 implementation is capable of sending action frames 2543 * to update the AP about the station's SMPS mode, and will instruct 2544 * the driver to enter the specific mode. It will also announce the 2545 * requested SMPS mode during the association handshake. Hardware 2546 * support for this feature is required, and can be indicated by 2547 * hardware flags. 2548 * 2549 * The default mode will be "automatic", which nl80211/cfg80211 2550 * defines to be dynamic SMPS in (regular) powersave, and SMPS 2551 * turned off otherwise. 2552 * 2553 * To support this feature, the driver must set the appropriate 2554 * hardware support flags, and handle the SMPS flag to the config() 2555 * operation. It will then with this mechanism be instructed to 2556 * enter the requested SMPS mode while associated to an HT AP. 2557 */ 2558 2559 /** 2560 * DOC: Frame filtering 2561 * 2562 * mac80211 requires to see many management frames for proper 2563 * operation, and users may want to see many more frames when 2564 * in monitor mode. However, for best CPU usage and power consumption, 2565 * having as few frames as possible percolate through the stack is 2566 * desirable. Hence, the hardware should filter as much as possible. 2567 * 2568 * To achieve this, mac80211 uses filter flags (see below) to tell 2569 * the driver's configure_filter() function which frames should be 2570 * passed to mac80211 and which should be filtered out. 2571 * 2572 * Before configure_filter() is invoked, the prepare_multicast() 2573 * callback is invoked with the parameters @mc_count and @mc_list 2574 * for the combined multicast address list of all virtual interfaces. 2575 * It's use is optional, and it returns a u64 that is passed to 2576 * configure_filter(). Additionally, configure_filter() has the 2577 * arguments @changed_flags telling which flags were changed and 2578 * @total_flags with the new flag states. 2579 * 2580 * If your device has no multicast address filters your driver will 2581 * need to check both the %FIF_ALLMULTI flag and the @mc_count 2582 * parameter to see whether multicast frames should be accepted 2583 * or dropped. 2584 * 2585 * All unsupported flags in @total_flags must be cleared. 2586 * Hardware does not support a flag if it is incapable of _passing_ 2587 * the frame to the stack. Otherwise the driver must ignore 2588 * the flag, but not clear it. 2589 * You must _only_ clear the flag (announce no support for the 2590 * flag to mac80211) if you are not able to pass the packet type 2591 * to the stack (so the hardware always filters it). 2592 * So for example, you should clear @FIF_CONTROL, if your hardware 2593 * always filters control frames. If your hardware always passes 2594 * control frames to the kernel and is incapable of filtering them, 2595 * you do _not_ clear the @FIF_CONTROL flag. 2596 * This rule applies to all other FIF flags as well. 2597 */ 2598 2599 /** 2600 * DOC: AP support for powersaving clients 2601 * 2602 * In order to implement AP and P2P GO modes, mac80211 has support for 2603 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 2604 * There currently is no support for sAPSD. 2605 * 2606 * There is one assumption that mac80211 makes, namely that a client 2607 * will not poll with PS-Poll and trigger with uAPSD at the same time. 2608 * Both are supported, and both can be used by the same client, but 2609 * they can't be used concurrently by the same client. This simplifies 2610 * the driver code. 2611 * 2612 * The first thing to keep in mind is that there is a flag for complete 2613 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 2614 * mac80211 expects the driver to handle most of the state machine for 2615 * powersaving clients and will ignore the PM bit in incoming frames. 2616 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 2617 * stations' powersave transitions. In this mode, mac80211 also doesn't 2618 * handle PS-Poll/uAPSD. 2619 * 2620 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 2621 * PM bit in incoming frames for client powersave transitions. When a 2622 * station goes to sleep, we will stop transmitting to it. There is, 2623 * however, a race condition: a station might go to sleep while there is 2624 * data buffered on hardware queues. If the device has support for this 2625 * it will reject frames, and the driver should give the frames back to 2626 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 2627 * cause mac80211 to retry the frame when the station wakes up. The 2628 * driver is also notified of powersave transitions by calling its 2629 * @sta_notify callback. 2630 * 2631 * When the station is asleep, it has three choices: it can wake up, 2632 * it can PS-Poll, or it can possibly start a uAPSD service period. 2633 * Waking up is implemented by simply transmitting all buffered (and 2634 * filtered) frames to the station. This is the easiest case. When 2635 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 2636 * will inform the driver of this with the @allow_buffered_frames 2637 * callback; this callback is optional. mac80211 will then transmit 2638 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 2639 * on each frame. The last frame in the service period (or the only 2640 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 2641 * indicate that it ends the service period; as this frame must have 2642 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 2643 * When TX status is reported for this frame, the service period is 2644 * marked has having ended and a new one can be started by the peer. 2645 * 2646 * Additionally, non-bufferable MMPDUs can also be transmitted by 2647 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 2648 * 2649 * Another race condition can happen on some devices like iwlwifi 2650 * when there are frames queued for the station and it wakes up 2651 * or polls; the frames that are already queued could end up being 2652 * transmitted first instead, causing reordering and/or wrong 2653 * processing of the EOSP. The cause is that allowing frames to be 2654 * transmitted to a certain station is out-of-band communication to 2655 * the device. To allow this problem to be solved, the driver can 2656 * call ieee80211_sta_block_awake() if frames are buffered when it 2657 * is notified that the station went to sleep. When all these frames 2658 * have been filtered (see above), it must call the function again 2659 * to indicate that the station is no longer blocked. 2660 * 2661 * If the driver buffers frames in the driver for aggregation in any 2662 * way, it must use the ieee80211_sta_set_buffered() call when it is 2663 * notified of the station going to sleep to inform mac80211 of any 2664 * TIDs that have frames buffered. Note that when a station wakes up 2665 * this information is reset (hence the requirement to call it when 2666 * informed of the station going to sleep). Then, when a service 2667 * period starts for any reason, @release_buffered_frames is called 2668 * with the number of frames to be released and which TIDs they are 2669 * to come from. In this case, the driver is responsible for setting 2670 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 2671 * to help the @more_data parameter is passed to tell the driver if 2672 * there is more data on other TIDs -- the TIDs to release frames 2673 * from are ignored since mac80211 doesn't know how many frames the 2674 * buffers for those TIDs contain. 2675 * 2676 * If the driver also implement GO mode, where absence periods may 2677 * shorten service periods (or abort PS-Poll responses), it must 2678 * filter those response frames except in the case of frames that 2679 * are buffered in the driver -- those must remain buffered to avoid 2680 * reordering. Because it is possible that no frames are released 2681 * in this case, the driver must call ieee80211_sta_eosp() 2682 * to indicate to mac80211 that the service period ended anyway. 2683 * 2684 * Finally, if frames from multiple TIDs are released from mac80211 2685 * but the driver might reorder them, it must clear & set the flags 2686 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 2687 * and also take care of the EOSP and MORE_DATA bits in the frame. 2688 * The driver may also use ieee80211_sta_eosp() in this case. 2689 * 2690 * Note that if the driver ever buffers frames other than QoS-data 2691 * frames, it must take care to never send a non-QoS-data frame as 2692 * the last frame in a service period, adding a QoS-nulldata frame 2693 * after a non-QoS-data frame if needed. 2694 */ 2695 2696 /** 2697 * DOC: HW queue control 2698 * 2699 * Before HW queue control was introduced, mac80211 only had a single static 2700 * assignment of per-interface AC software queues to hardware queues. This 2701 * was problematic for a few reasons: 2702 * 1) off-channel transmissions might get stuck behind other frames 2703 * 2) multiple virtual interfaces couldn't be handled correctly 2704 * 3) after-DTIM frames could get stuck behind other frames 2705 * 2706 * To solve this, hardware typically uses multiple different queues for all 2707 * the different usages, and this needs to be propagated into mac80211 so it 2708 * won't have the same problem with the software queues. 2709 * 2710 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 2711 * flag that tells it that the driver implements its own queue control. To do 2712 * so, the driver will set up the various queues in each &struct ieee80211_vif 2713 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 2714 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 2715 * if necessary will queue the frame on the right software queue that mirrors 2716 * the hardware queue. 2717 * Additionally, the driver has to then use these HW queue IDs for the queue 2718 * management functions (ieee80211_stop_queue() et al.) 2719 * 2720 * The driver is free to set up the queue mappings as needed, multiple virtual 2721 * interfaces may map to the same hardware queues if needed. The setup has to 2722 * happen during add_interface or change_interface callbacks. For example, a 2723 * driver supporting station+station and station+AP modes might decide to have 2724 * 10 hardware queues to handle different scenarios: 2725 * 2726 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 2727 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 2728 * after-DTIM queue for AP: 8 2729 * off-channel queue: 9 2730 * 2731 * It would then set up the hardware like this: 2732 * hw.offchannel_tx_hw_queue = 9 2733 * 2734 * and the first virtual interface that is added as follows: 2735 * vif.hw_queue[IEEE80211_AC_VO] = 0 2736 * vif.hw_queue[IEEE80211_AC_VI] = 1 2737 * vif.hw_queue[IEEE80211_AC_BE] = 2 2738 * vif.hw_queue[IEEE80211_AC_BK] = 3 2739 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2740 * and the second virtual interface with 4-7. 2741 * 2742 * If queue 6 gets full, for example, mac80211 would only stop the second 2743 * virtual interface's BE queue since virtual interface queues are per AC. 2744 * 2745 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2746 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2747 * queue could potentially be shared since mac80211 will look at cab_queue when 2748 * a queue is stopped/woken even if the interface is not in AP mode. 2749 */ 2750 2751 /** 2752 * enum ieee80211_filter_flags - hardware filter flags 2753 * 2754 * These flags determine what the filter in hardware should be 2755 * programmed to let through and what should not be passed to the 2756 * stack. It is always safe to pass more frames than requested, 2757 * but this has negative impact on power consumption. 2758 * 2759 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2760 * by the user or if the hardware is not capable of filtering by 2761 * multicast address. 2762 * 2763 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2764 * %RX_FLAG_FAILED_FCS_CRC for them) 2765 * 2766 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2767 * the %RX_FLAG_FAILED_PLCP_CRC for them 2768 * 2769 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2770 * to the hardware that it should not filter beacons or probe responses 2771 * by BSSID. Filtering them can greatly reduce the amount of processing 2772 * mac80211 needs to do and the amount of CPU wakeups, so you should 2773 * honour this flag if possible. 2774 * 2775 * @FIF_CONTROL: pass control frames (except for PS Poll) addressed to this 2776 * station 2777 * 2778 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2779 * 2780 * @FIF_PSPOLL: pass PS Poll frames 2781 * 2782 * @FIF_PROBE_REQ: pass probe request frames 2783 */ 2784 enum ieee80211_filter_flags { 2785 FIF_ALLMULTI = 1<<1, 2786 FIF_FCSFAIL = 1<<2, 2787 FIF_PLCPFAIL = 1<<3, 2788 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2789 FIF_CONTROL = 1<<5, 2790 FIF_OTHER_BSS = 1<<6, 2791 FIF_PSPOLL = 1<<7, 2792 FIF_PROBE_REQ = 1<<8, 2793 }; 2794 2795 /** 2796 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2797 * 2798 * These flags are used with the ampdu_action() callback in 2799 * &struct ieee80211_ops to indicate which action is needed. 2800 * 2801 * Note that drivers MUST be able to deal with a TX aggregation 2802 * session being stopped even before they OK'ed starting it by 2803 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2804 * might receive the addBA frame and send a delBA right away! 2805 * 2806 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2807 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2808 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2809 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2810 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2811 * queued packets, now unaggregated. After all packets are transmitted the 2812 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2813 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2814 * called when the station is removed. There's no need or reason to call 2815 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2816 * session is gone and removes the station. 2817 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2818 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2819 * now the connection is dropped and the station will be removed. Drivers 2820 * should clean up and drop remaining packets when this is called. 2821 */ 2822 enum ieee80211_ampdu_mlme_action { 2823 IEEE80211_AMPDU_RX_START, 2824 IEEE80211_AMPDU_RX_STOP, 2825 IEEE80211_AMPDU_TX_START, 2826 IEEE80211_AMPDU_TX_STOP_CONT, 2827 IEEE80211_AMPDU_TX_STOP_FLUSH, 2828 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2829 IEEE80211_AMPDU_TX_OPERATIONAL, 2830 }; 2831 2832 /** 2833 * struct ieee80211_ampdu_params - AMPDU action parameters 2834 * 2835 * @action: the ampdu action, value from %ieee80211_ampdu_mlme_action. 2836 * @sta: peer of this AMPDU session 2837 * @tid: tid of the BA session 2838 * @ssn: start sequence number of the session. TX/RX_STOP can pass 0. When 2839 * action is set to %IEEE80211_AMPDU_RX_START the driver passes back the 2840 * actual ssn value used to start the session and writes the value here. 2841 * @buf_size: reorder buffer size (number of subframes). Valid only when the 2842 * action is set to %IEEE80211_AMPDU_RX_START or 2843 * %IEEE80211_AMPDU_TX_OPERATIONAL 2844 * @amsdu: indicates the peer's ability to receive A-MSDU within A-MPDU. 2845 * valid when the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL 2846 * @timeout: BA session timeout. Valid only when the action is set to 2847 * %IEEE80211_AMPDU_RX_START 2848 */ 2849 struct ieee80211_ampdu_params { 2850 enum ieee80211_ampdu_mlme_action action; 2851 struct ieee80211_sta *sta; 2852 u16 tid; 2853 u16 ssn; 2854 u8 buf_size; 2855 bool amsdu; 2856 u16 timeout; 2857 }; 2858 2859 /** 2860 * enum ieee80211_frame_release_type - frame release reason 2861 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2862 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2863 * frame received on trigger-enabled AC 2864 */ 2865 enum ieee80211_frame_release_type { 2866 IEEE80211_FRAME_RELEASE_PSPOLL, 2867 IEEE80211_FRAME_RELEASE_UAPSD, 2868 }; 2869 2870 /** 2871 * enum ieee80211_rate_control_changed - flags to indicate what changed 2872 * 2873 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2874 * to this station changed. The actual bandwidth is in the station 2875 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2876 * flag changes, for HT and VHT the bandwidth field changes. 2877 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2878 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2879 * changed (in IBSS mode) due to discovering more information about 2880 * the peer. 2881 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2882 * by the peer 2883 */ 2884 enum ieee80211_rate_control_changed { 2885 IEEE80211_RC_BW_CHANGED = BIT(0), 2886 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2887 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2888 IEEE80211_RC_NSS_CHANGED = BIT(3), 2889 }; 2890 2891 /** 2892 * enum ieee80211_roc_type - remain on channel type 2893 * 2894 * With the support for multi channel contexts and multi channel operations, 2895 * remain on channel operations might be limited/deferred/aborted by other 2896 * flows/operations which have higher priority (and vise versa). 2897 * Specifying the ROC type can be used by devices to prioritize the ROC 2898 * operations compared to other operations/flows. 2899 * 2900 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC. 2901 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required 2902 * for sending managment frames offchannel. 2903 */ 2904 enum ieee80211_roc_type { 2905 IEEE80211_ROC_TYPE_NORMAL = 0, 2906 IEEE80211_ROC_TYPE_MGMT_TX, 2907 }; 2908 2909 /** 2910 * enum ieee80211_reconfig_complete_type - reconfig type 2911 * 2912 * This enum is used by the reconfig_complete() callback to indicate what 2913 * reconfiguration type was completed. 2914 * 2915 * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type 2916 * (also due to resume() callback returning 1) 2917 * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless 2918 * of wowlan configuration) 2919 */ 2920 enum ieee80211_reconfig_type { 2921 IEEE80211_RECONFIG_TYPE_RESTART, 2922 IEEE80211_RECONFIG_TYPE_SUSPEND, 2923 }; 2924 2925 /** 2926 * struct ieee80211_ops - callbacks from mac80211 to the driver 2927 * 2928 * This structure contains various callbacks that the driver may 2929 * handle or, in some cases, must handle, for example to configure 2930 * the hardware to a new channel or to transmit a frame. 2931 * 2932 * @tx: Handler that 802.11 module calls for each transmitted frame. 2933 * skb contains the buffer starting from the IEEE 802.11 header. 2934 * The low-level driver should send the frame out based on 2935 * configuration in the TX control data. This handler should, 2936 * preferably, never fail and stop queues appropriately. 2937 * Must be atomic. 2938 * 2939 * @start: Called before the first netdevice attached to the hardware 2940 * is enabled. This should turn on the hardware and must turn on 2941 * frame reception (for possibly enabled monitor interfaces.) 2942 * Returns negative error codes, these may be seen in userspace, 2943 * or zero. 2944 * When the device is started it should not have a MAC address 2945 * to avoid acknowledging frames before a non-monitor device 2946 * is added. 2947 * Must be implemented and can sleep. 2948 * 2949 * @stop: Called after last netdevice attached to the hardware 2950 * is disabled. This should turn off the hardware (at least 2951 * it must turn off frame reception.) 2952 * May be called right after add_interface if that rejects 2953 * an interface. If you added any work onto the mac80211 workqueue 2954 * you should ensure to cancel it on this callback. 2955 * Must be implemented and can sleep. 2956 * 2957 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2958 * stop transmitting and doing any other configuration, and then 2959 * ask the device to suspend. This is only invoked when WoWLAN is 2960 * configured, otherwise the device is deconfigured completely and 2961 * reconfigured at resume time. 2962 * The driver may also impose special conditions under which it 2963 * wants to use the "normal" suspend (deconfigure), say if it only 2964 * supports WoWLAN when the device is associated. In this case, it 2965 * must return 1 from this function. 2966 * 2967 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2968 * now resuming its operation, after this the device must be fully 2969 * functional again. If this returns an error, the only way out is 2970 * to also unregister the device. If it returns 1, then mac80211 2971 * will also go through the regular complete restart on resume. 2972 * 2973 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2974 * modified. The reason is that device_set_wakeup_enable() is 2975 * supposed to be called when the configuration changes, not only 2976 * in suspend(). 2977 * 2978 * @add_interface: Called when a netdevice attached to the hardware is 2979 * enabled. Because it is not called for monitor mode devices, @start 2980 * and @stop must be implemented. 2981 * The driver should perform any initialization it needs before 2982 * the device can be enabled. The initial configuration for the 2983 * interface is given in the conf parameter. 2984 * The callback may refuse to add an interface by returning a 2985 * negative error code (which will be seen in userspace.) 2986 * Must be implemented and can sleep. 2987 * 2988 * @change_interface: Called when a netdevice changes type. This callback 2989 * is optional, but only if it is supported can interface types be 2990 * switched while the interface is UP. The callback may sleep. 2991 * Note that while an interface is being switched, it will not be 2992 * found by the interface iteration callbacks. 2993 * 2994 * @remove_interface: Notifies a driver that an interface is going down. 2995 * The @stop callback is called after this if it is the last interface 2996 * and no monitor interfaces are present. 2997 * When all interfaces are removed, the MAC address in the hardware 2998 * must be cleared so the device no longer acknowledges packets, 2999 * the mac_addr member of the conf structure is, however, set to the 3000 * MAC address of the device going away. 3001 * Hence, this callback must be implemented. It can sleep. 3002 * 3003 * @config: Handler for configuration requests. IEEE 802.11 code calls this 3004 * function to change hardware configuration, e.g., channel. 3005 * This function should never fail but returns a negative error code 3006 * if it does. The callback can sleep. 3007 * 3008 * @bss_info_changed: Handler for configuration requests related to BSS 3009 * parameters that may vary during BSS's lifespan, and may affect low 3010 * level driver (e.g. assoc/disassoc status, erp parameters). 3011 * This function should not be used if no BSS has been set, unless 3012 * for association indication. The @changed parameter indicates which 3013 * of the bss parameters has changed when a call is made. The callback 3014 * can sleep. 3015 * 3016 * @prepare_multicast: Prepare for multicast filter configuration. 3017 * This callback is optional, and its return value is passed 3018 * to configure_filter(). This callback must be atomic. 3019 * 3020 * @configure_filter: Configure the device's RX filter. 3021 * See the section "Frame filtering" for more information. 3022 * This callback must be implemented and can sleep. 3023 * 3024 * @config_iface_filter: Configure the interface's RX filter. 3025 * This callback is optional and is used to configure which frames 3026 * should be passed to mac80211. The filter_flags is the combination 3027 * of FIF_* flags. The changed_flags is a bit mask that indicates 3028 * which flags are changed. 3029 * This callback can sleep. 3030 * 3031 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 3032 * must be set or cleared for a given STA. Must be atomic. 3033 * 3034 * @set_key: See the section "Hardware crypto acceleration" 3035 * This callback is only called between add_interface and 3036 * remove_interface calls, i.e. while the given virtual interface 3037 * is enabled. 3038 * Returns a negative error code if the key can't be added. 3039 * The callback can sleep. 3040 * 3041 * @update_tkip_key: See the section "Hardware crypto acceleration" 3042 * This callback will be called in the context of Rx. Called for drivers 3043 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 3044 * The callback must be atomic. 3045 * 3046 * @set_rekey_data: If the device supports GTK rekeying, for example while the 3047 * host is suspended, it can assign this callback to retrieve the data 3048 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 3049 * After rekeying was done it should (for example during resume) notify 3050 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 3051 * 3052 * @set_default_unicast_key: Set the default (unicast) key index, useful for 3053 * WEP when the device sends data packets autonomously, e.g. for ARP 3054 * offloading. The index can be 0-3, or -1 for unsetting it. 3055 * 3056 * @hw_scan: Ask the hardware to service the scan request, no need to start 3057 * the scan state machine in stack. The scan must honour the channel 3058 * configuration done by the regulatory agent in the wiphy's 3059 * registered bands. The hardware (or the driver) needs to make sure 3060 * that power save is disabled. 3061 * The @req ie/ie_len members are rewritten by mac80211 to contain the 3062 * entire IEs after the SSID, so that drivers need not look at these 3063 * at all but just send them after the SSID -- mac80211 includes the 3064 * (extended) supported rates and HT information (where applicable). 3065 * When the scan finishes, ieee80211_scan_completed() must be called; 3066 * note that it also must be called when the scan cannot finish due to 3067 * any error unless this callback returned a negative error code. 3068 * The callback can sleep. 3069 * 3070 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 3071 * The driver should ask the hardware to cancel the scan (if possible), 3072 * but the scan will be completed only after the driver will call 3073 * ieee80211_scan_completed(). 3074 * This callback is needed for wowlan, to prevent enqueueing a new 3075 * scan_work after the low-level driver was already suspended. 3076 * The callback can sleep. 3077 * 3078 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 3079 * specific intervals. The driver must call the 3080 * ieee80211_sched_scan_results() function whenever it finds results. 3081 * This process will continue until sched_scan_stop is called. 3082 * 3083 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 3084 * In this case, ieee80211_sched_scan_stopped() must not be called. 3085 * 3086 * @sw_scan_start: Notifier function that is called just before a software scan 3087 * is started. Can be NULL, if the driver doesn't need this notification. 3088 * The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR, 3089 * the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it 3090 * can use this parameter. The callback can sleep. 3091 * 3092 * @sw_scan_complete: Notifier function that is called just after a 3093 * software scan finished. Can be NULL, if the driver doesn't need 3094 * this notification. 3095 * The callback can sleep. 3096 * 3097 * @get_stats: Return low-level statistics. 3098 * Returns zero if statistics are available. 3099 * The callback can sleep. 3100 * 3101 * @get_key_seq: If your device implements encryption in hardware and does 3102 * IV/PN assignment then this callback should be provided to read the 3103 * IV/PN for the given key from hardware. 3104 * The callback must be atomic. 3105 * 3106 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 3107 * if the device does fragmentation by itself. Note that to prevent the 3108 * stack from doing fragmentation IEEE80211_HW_SUPPORTS_TX_FRAG 3109 * should be set as well. 3110 * The callback can sleep. 3111 * 3112 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 3113 * The callback can sleep. 3114 * 3115 * @sta_add: Notifies low level driver about addition of an associated station, 3116 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 3117 * 3118 * @sta_remove: Notifies low level driver about removal of an associated 3119 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback 3120 * returns it isn't safe to use the pointer, not even RCU protected; 3121 * no RCU grace period is guaranteed between returning here and freeing 3122 * the station. See @sta_pre_rcu_remove if needed. 3123 * This callback can sleep. 3124 * 3125 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 3126 * when a station is added to mac80211's station list. This callback 3127 * should be within a CONFIG_MAC80211_DEBUGFS conditional. This 3128 * callback can sleep. 3129 * 3130 * @sta_notify: Notifies low level driver about power state transition of an 3131 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 3132 * in AP mode, this callback will not be called when the flag 3133 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 3134 * 3135 * @sta_state: Notifies low level driver about state transition of a 3136 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 3137 * This callback is mutually exclusive with @sta_add/@sta_remove. 3138 * It must not fail for down transitions but may fail for transitions 3139 * up the list of states. Also note that after the callback returns it 3140 * isn't safe to use the pointer, not even RCU protected - no RCU grace 3141 * period is guaranteed between returning here and freeing the station. 3142 * See @sta_pre_rcu_remove if needed. 3143 * The callback can sleep. 3144 * 3145 * @sta_pre_rcu_remove: Notify driver about station removal before RCU 3146 * synchronisation. This is useful if a driver needs to have station 3147 * pointers protected using RCU, it can then use this call to clear 3148 * the pointers instead of waiting for an RCU grace period to elapse 3149 * in @sta_state. 3150 * The callback can sleep. 3151 * 3152 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 3153 * used to transmit to the station. The changes are advertised with bits 3154 * from &enum ieee80211_rate_control_changed and the values are reflected 3155 * in the station data. This callback should only be used when the driver 3156 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 3157 * otherwise the rate control algorithm is notified directly. 3158 * Must be atomic. 3159 * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This 3160 * is only used if the configured rate control algorithm actually uses 3161 * the new rate table API, and is therefore optional. Must be atomic. 3162 * 3163 * @sta_statistics: Get statistics for this station. For example with beacon 3164 * filtering, the statistics kept by mac80211 might not be accurate, so 3165 * let the driver pre-fill the statistics. The driver can fill most of 3166 * the values (indicating which by setting the filled bitmap), but not 3167 * all of them make sense - see the source for which ones are possible. 3168 * Statistics that the driver doesn't fill will be filled by mac80211. 3169 * The callback can sleep. 3170 * 3171 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 3172 * bursting) for a hardware TX queue. 3173 * Returns a negative error code on failure. 3174 * The callback can sleep. 3175 * 3176 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 3177 * this is only used for IBSS mode BSSID merging and debugging. Is not a 3178 * required function. 3179 * The callback can sleep. 3180 * 3181 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 3182 * Currently, this is only used for IBSS mode debugging. Is not a 3183 * required function. 3184 * The callback can sleep. 3185 * 3186 * @offset_tsf: Offset the TSF timer by the specified value in the 3187 * firmware/hardware. Preferred to set_tsf as it avoids delay between 3188 * calling set_tsf() and hardware getting programmed, which will show up 3189 * as TSF delay. Is not a required function. 3190 * The callback can sleep. 3191 * 3192 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 3193 * with other STAs in the IBSS. This is only used in IBSS mode. This 3194 * function is optional if the firmware/hardware takes full care of 3195 * TSF synchronization. 3196 * The callback can sleep. 3197 * 3198 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 3199 * This is needed only for IBSS mode and the result of this function is 3200 * used to determine whether to reply to Probe Requests. 3201 * Returns non-zero if this device sent the last beacon. 3202 * The callback can sleep. 3203 * 3204 * @ampdu_action: Perform a certain A-MPDU action 3205 * The RA/TID combination determines the destination and TID we want 3206 * the ampdu action to be performed for. The action is defined through 3207 * ieee80211_ampdu_mlme_action. 3208 * When the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL the driver 3209 * may neither send aggregates containing more subframes than @buf_size 3210 * nor send aggregates in a way that lost frames would exceed the 3211 * buffer size. If just limiting the aggregate size, this would be 3212 * possible with a buf_size of 8: 3213 * - TX: 1.....7 3214 * - RX: 2....7 (lost frame #1) 3215 * - TX: 8..1... 3216 * which is invalid since #1 was now re-transmitted well past the 3217 * buffer size of 8. Correct ways to retransmit #1 would be: 3218 * - TX: 1 or 18 or 81 3219 * Even "189" would be wrong since 1 could be lost again. 3220 * 3221 * Returns a negative error code on failure. 3222 * The callback can sleep. 3223 * 3224 * @get_survey: Return per-channel survey information 3225 * 3226 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 3227 * need to set wiphy->rfkill_poll to %true before registration, 3228 * and need to call wiphy_rfkill_set_hw_state() in the callback. 3229 * The callback can sleep. 3230 * 3231 * @set_coverage_class: Set slot time for given coverage class as specified 3232 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 3233 * accordingly; coverage class equals to -1 to enable ACK timeout 3234 * estimation algorithm (dynack). To disable dynack set valid value for 3235 * coverage class. This callback is not required and may sleep. 3236 * 3237 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may 3238 * be %NULL. The callback can sleep. 3239 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 3240 * 3241 * @flush: Flush all pending frames from the hardware queue, making sure 3242 * that the hardware queues are empty. The @queues parameter is a bitmap 3243 * of queues to flush, which is useful if different virtual interfaces 3244 * use different hardware queues; it may also indicate all queues. 3245 * If the parameter @drop is set to %true, pending frames may be dropped. 3246 * Note that vif can be NULL. 3247 * The callback can sleep. 3248 * 3249 * @channel_switch: Drivers that need (or want) to offload the channel 3250 * switch operation for CSAs received from the AP may implement this 3251 * callback. They must then call ieee80211_chswitch_done() to indicate 3252 * completion of the channel switch. 3253 * 3254 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 3255 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 3256 * reject TX/RX mask combinations they cannot support by returning -EINVAL 3257 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 3258 * 3259 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 3260 * 3261 * @remain_on_channel: Starts an off-channel period on the given channel, must 3262 * call back to ieee80211_ready_on_channel() when on that channel. Note 3263 * that normal channel traffic is not stopped as this is intended for hw 3264 * offload. Frames to transmit on the off-channel channel are transmitted 3265 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 3266 * duration (which will always be non-zero) expires, the driver must call 3267 * ieee80211_remain_on_channel_expired(). 3268 * Note that this callback may be called while the device is in IDLE and 3269 * must be accepted in this case. 3270 * This callback may sleep. 3271 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 3272 * aborted before it expires. This callback may sleep. 3273 * 3274 * @set_ringparam: Set tx and rx ring sizes. 3275 * 3276 * @get_ringparam: Get tx and rx ring current and maximum sizes. 3277 * 3278 * @tx_frames_pending: Check if there is any pending frame in the hardware 3279 * queues before entering power save. 3280 * 3281 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 3282 * when transmitting a frame. Currently only legacy rates are handled. 3283 * The callback can sleep. 3284 * @event_callback: Notify driver about any event in mac80211. See 3285 * &enum ieee80211_event_type for the different types. 3286 * The callback must be atomic. 3287 * 3288 * @release_buffered_frames: Release buffered frames according to the given 3289 * parameters. In the case where the driver buffers some frames for 3290 * sleeping stations mac80211 will use this callback to tell the driver 3291 * to release some frames, either for PS-poll or uAPSD. 3292 * Note that if the @more_data parameter is %false the driver must check 3293 * if there are more frames on the given TIDs, and if there are more than 3294 * the frames being released then it must still set the more-data bit in 3295 * the frame. If the @more_data parameter is %true, then of course the 3296 * more-data bit must always be set. 3297 * The @tids parameter tells the driver which TIDs to release frames 3298 * from, for PS-poll it will always have only a single bit set. 3299 * In the case this is used for a PS-poll initiated release, the 3300 * @num_frames parameter will always be 1 so code can be shared. In 3301 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 3302 * on the TX status (and must report TX status) so that the PS-poll 3303 * period is properly ended. This is used to avoid sending multiple 3304 * responses for a retried PS-poll frame. 3305 * In the case this is used for uAPSD, the @num_frames parameter may be 3306 * bigger than one, but the driver may send fewer frames (it must send 3307 * at least one, however). In this case it is also responsible for 3308 * setting the EOSP flag in the QoS header of the frames. Also, when the 3309 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 3310 * on the last frame in the SP. Alternatively, it may call the function 3311 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP. 3312 * This callback must be atomic. 3313 * @allow_buffered_frames: Prepare device to allow the given number of frames 3314 * to go out to the given station. The frames will be sent by mac80211 3315 * via the usual TX path after this call. The TX information for frames 3316 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 3317 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 3318 * frames from multiple TIDs are released and the driver might reorder 3319 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 3320 * on the last frame and clear it on all others and also handle the EOSP 3321 * bit in the QoS header correctly. Alternatively, it can also call the 3322 * ieee80211_sta_eosp() function. 3323 * The @tids parameter is a bitmap and tells the driver which TIDs the 3324 * frames will be on; it will at most have two bits set. 3325 * This callback must be atomic. 3326 * 3327 * @get_et_sset_count: Ethtool API to get string-set count. 3328 * 3329 * @get_et_stats: Ethtool API to get a set of u64 stats. 3330 * 3331 * @get_et_strings: Ethtool API to get a set of strings to describe stats 3332 * and perhaps other supported types of ethtool data-sets. 3333 * 3334 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 3335 * before associated. In multi-channel scenarios, a virtual interface is 3336 * bound to a channel before it is associated, but as it isn't associated 3337 * yet it need not necessarily be given airtime, in particular since any 3338 * transmission to a P2P GO needs to be synchronized against the GO's 3339 * powersave state. mac80211 will call this function before transmitting a 3340 * management frame prior to having successfully associated to allow the 3341 * driver to give it channel time for the transmission, to get a response 3342 * and to be able to synchronize with the GO. 3343 * The callback will be called before each transmission and upon return 3344 * mac80211 will transmit the frame right away. 3345 * The callback is optional and can (should!) sleep. 3346 * 3347 * @mgd_protect_tdls_discover: Protect a TDLS discovery session. After sending 3348 * a TDLS discovery-request, we expect a reply to arrive on the AP's 3349 * channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS 3350 * setup-response is a direct packet not buffered by the AP. 3351 * mac80211 will call this function just before the transmission of a TDLS 3352 * discovery-request. The recommended period of protection is at least 3353 * 2 * (DTIM period). 3354 * The callback is optional and can sleep. 3355 * 3356 * @add_chanctx: Notifies device driver about new channel context creation. 3357 * This callback may sleep. 3358 * @remove_chanctx: Notifies device driver about channel context destruction. 3359 * This callback may sleep. 3360 * @change_chanctx: Notifies device driver about channel context changes that 3361 * may happen when combining different virtual interfaces on the same 3362 * channel context with different settings 3363 * This callback may sleep. 3364 * @assign_vif_chanctx: Notifies device driver about channel context being bound 3365 * to vif. Possible use is for hw queue remapping. 3366 * This callback may sleep. 3367 * @unassign_vif_chanctx: Notifies device driver about channel context being 3368 * unbound from vif. 3369 * This callback may sleep. 3370 * @switch_vif_chanctx: switch a number of vifs from one chanctx to 3371 * another, as specified in the list of 3372 * @ieee80211_vif_chanctx_switch passed to the driver, according 3373 * to the mode defined in &ieee80211_chanctx_switch_mode. 3374 * This callback may sleep. 3375 * 3376 * @start_ap: Start operation on the AP interface, this is called after all the 3377 * information in bss_conf is set and beacon can be retrieved. A channel 3378 * context is bound before this is called. Note that if the driver uses 3379 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 3380 * just "paused" for scanning/ROC, which is indicated by the beacon being 3381 * disabled/enabled via @bss_info_changed. 3382 * @stop_ap: Stop operation on the AP interface. 3383 * 3384 * @reconfig_complete: Called after a call to ieee80211_restart_hw() and 3385 * during resume, when the reconfiguration has completed. 3386 * This can help the driver implement the reconfiguration step (and 3387 * indicate mac80211 is ready to receive frames). 3388 * This callback may sleep. 3389 * 3390 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 3391 * Currently, this is only called for managed or P2P client interfaces. 3392 * This callback is optional; it must not sleep. 3393 * 3394 * @channel_switch_beacon: Starts a channel switch to a new channel. 3395 * Beacons are modified to include CSA or ECSA IEs before calling this 3396 * function. The corresponding count fields in these IEs must be 3397 * decremented, and when they reach 1 the driver must call 3398 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get() 3399 * get the csa counter decremented by mac80211, but must check if it is 3400 * 1 using ieee80211_csa_is_complete() after the beacon has been 3401 * transmitted and then call ieee80211_csa_finish(). 3402 * If the CSA count starts as zero or 1, this function will not be called, 3403 * since there won't be any time to beacon before the switch anyway. 3404 * @pre_channel_switch: This is an optional callback that is called 3405 * before a channel switch procedure is started (ie. when a STA 3406 * gets a CSA or an userspace initiated channel-switch), allowing 3407 * the driver to prepare for the channel switch. 3408 * @post_channel_switch: This is an optional callback that is called 3409 * after a channel switch procedure is completed, allowing the 3410 * driver to go back to a normal configuration. 3411 * 3412 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all 3413 * information in bss_conf is set up and the beacon can be retrieved. A 3414 * channel context is bound before this is called. 3415 * @leave_ibss: Leave the IBSS again. 3416 * 3417 * @get_expected_throughput: extract the expected throughput towards the 3418 * specified station. The returned value is expressed in Kbps. It returns 0 3419 * if the RC algorithm does not have proper data to provide. 3420 * 3421 * @get_txpower: get current maximum tx power (in dBm) based on configuration 3422 * and hardware limits. 3423 * 3424 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver 3425 * is responsible for continually initiating channel-switching operations 3426 * and returning to the base channel for communication with the AP. The 3427 * driver receives a channel-switch request template and the location of 3428 * the switch-timing IE within the template as part of the invocation. 3429 * The template is valid only within the call, and the driver can 3430 * optionally copy the skb for further re-use. 3431 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both 3432 * peers must be on the base channel when the call completes. 3433 * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or 3434 * response) has been received from a remote peer. The driver gets 3435 * parameters parsed from the incoming frame and may use them to continue 3436 * an ongoing channel-switch operation. In addition, a channel-switch 3437 * response template is provided, together with the location of the 3438 * switch-timing IE within the template. The skb can only be used within 3439 * the function call. 3440 * 3441 * @wake_tx_queue: Called when new packets have been added to the queue. 3442 * @sync_rx_queues: Process all pending frames in RSS queues. This is a 3443 * synchronization which is needed in case driver has in its RSS queues 3444 * pending frames that were received prior to the control path action 3445 * currently taken (e.g. disassociation) but are not processed yet. 3446 * 3447 * @start_nan: join an existing NAN cluster, or create a new one. 3448 * @stop_nan: leave the NAN cluster. 3449 * @nan_change_conf: change NAN configuration. The data in cfg80211_nan_conf 3450 * contains full new configuration and changes specify which parameters 3451 * are changed with respect to the last NAN config. 3452 * The driver gets both full configuration and the changed parameters since 3453 * some devices may need the full configuration while others need only the 3454 * changed parameters. 3455 * @add_nan_func: Add a NAN function. Returns 0 on success. The data in 3456 * cfg80211_nan_func must not be referenced outside the scope of 3457 * this call. 3458 * @del_nan_func: Remove a NAN function. The driver must call 3459 * ieee80211_nan_func_terminated() with 3460 * NL80211_NAN_FUNC_TERM_REASON_USER_REQUEST reason code upon removal. 3461 */ 3462 struct ieee80211_ops { 3463 void (*tx)(struct ieee80211_hw *hw, 3464 struct ieee80211_tx_control *control, 3465 struct sk_buff *skb); 3466 int (*start)(struct ieee80211_hw *hw); 3467 void (*stop)(struct ieee80211_hw *hw); 3468 #ifdef CONFIG_PM 3469 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 3470 int (*resume)(struct ieee80211_hw *hw); 3471 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 3472 #endif 3473 int (*add_interface)(struct ieee80211_hw *hw, 3474 struct ieee80211_vif *vif); 3475 int (*change_interface)(struct ieee80211_hw *hw, 3476 struct ieee80211_vif *vif, 3477 enum nl80211_iftype new_type, bool p2p); 3478 void (*remove_interface)(struct ieee80211_hw *hw, 3479 struct ieee80211_vif *vif); 3480 int (*config)(struct ieee80211_hw *hw, u32 changed); 3481 void (*bss_info_changed)(struct ieee80211_hw *hw, 3482 struct ieee80211_vif *vif, 3483 struct ieee80211_bss_conf *info, 3484 u32 changed); 3485 3486 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3487 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3488 3489 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 3490 struct netdev_hw_addr_list *mc_list); 3491 void (*configure_filter)(struct ieee80211_hw *hw, 3492 unsigned int changed_flags, 3493 unsigned int *total_flags, 3494 u64 multicast); 3495 void (*config_iface_filter)(struct ieee80211_hw *hw, 3496 struct ieee80211_vif *vif, 3497 unsigned int filter_flags, 3498 unsigned int changed_flags); 3499 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3500 bool set); 3501 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 3502 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 3503 struct ieee80211_key_conf *key); 3504 void (*update_tkip_key)(struct ieee80211_hw *hw, 3505 struct ieee80211_vif *vif, 3506 struct ieee80211_key_conf *conf, 3507 struct ieee80211_sta *sta, 3508 u32 iv32, u16 *phase1key); 3509 void (*set_rekey_data)(struct ieee80211_hw *hw, 3510 struct ieee80211_vif *vif, 3511 struct cfg80211_gtk_rekey_data *data); 3512 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 3513 struct ieee80211_vif *vif, int idx); 3514 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3515 struct ieee80211_scan_request *req); 3516 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 3517 struct ieee80211_vif *vif); 3518 int (*sched_scan_start)(struct ieee80211_hw *hw, 3519 struct ieee80211_vif *vif, 3520 struct cfg80211_sched_scan_request *req, 3521 struct ieee80211_scan_ies *ies); 3522 int (*sched_scan_stop)(struct ieee80211_hw *hw, 3523 struct ieee80211_vif *vif); 3524 void (*sw_scan_start)(struct ieee80211_hw *hw, 3525 struct ieee80211_vif *vif, 3526 const u8 *mac_addr); 3527 void (*sw_scan_complete)(struct ieee80211_hw *hw, 3528 struct ieee80211_vif *vif); 3529 int (*get_stats)(struct ieee80211_hw *hw, 3530 struct ieee80211_low_level_stats *stats); 3531 void (*get_key_seq)(struct ieee80211_hw *hw, 3532 struct ieee80211_key_conf *key, 3533 struct ieee80211_key_seq *seq); 3534 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 3535 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 3536 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3537 struct ieee80211_sta *sta); 3538 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3539 struct ieee80211_sta *sta); 3540 #ifdef CONFIG_MAC80211_DEBUGFS 3541 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 3542 struct ieee80211_vif *vif, 3543 struct ieee80211_sta *sta, 3544 struct dentry *dir); 3545 #endif 3546 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3547 enum sta_notify_cmd, struct ieee80211_sta *sta); 3548 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3549 struct ieee80211_sta *sta, 3550 enum ieee80211_sta_state old_state, 3551 enum ieee80211_sta_state new_state); 3552 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw, 3553 struct ieee80211_vif *vif, 3554 struct ieee80211_sta *sta); 3555 void (*sta_rc_update)(struct ieee80211_hw *hw, 3556 struct ieee80211_vif *vif, 3557 struct ieee80211_sta *sta, 3558 u32 changed); 3559 void (*sta_rate_tbl_update)(struct ieee80211_hw *hw, 3560 struct ieee80211_vif *vif, 3561 struct ieee80211_sta *sta); 3562 void (*sta_statistics)(struct ieee80211_hw *hw, 3563 struct ieee80211_vif *vif, 3564 struct ieee80211_sta *sta, 3565 struct station_info *sinfo); 3566 int (*conf_tx)(struct ieee80211_hw *hw, 3567 struct ieee80211_vif *vif, u16 ac, 3568 const struct ieee80211_tx_queue_params *params); 3569 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3570 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3571 u64 tsf); 3572 void (*offset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3573 s64 offset); 3574 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3575 int (*tx_last_beacon)(struct ieee80211_hw *hw); 3576 int (*ampdu_action)(struct ieee80211_hw *hw, 3577 struct ieee80211_vif *vif, 3578 struct ieee80211_ampdu_params *params); 3579 int (*get_survey)(struct ieee80211_hw *hw, int idx, 3580 struct survey_info *survey); 3581 void (*rfkill_poll)(struct ieee80211_hw *hw); 3582 void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class); 3583 #ifdef CONFIG_NL80211_TESTMODE 3584 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3585 void *data, int len); 3586 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 3587 struct netlink_callback *cb, 3588 void *data, int len); 3589 #endif 3590 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3591 u32 queues, bool drop); 3592 void (*channel_switch)(struct ieee80211_hw *hw, 3593 struct ieee80211_vif *vif, 3594 struct ieee80211_channel_switch *ch_switch); 3595 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 3596 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 3597 3598 int (*remain_on_channel)(struct ieee80211_hw *hw, 3599 struct ieee80211_vif *vif, 3600 struct ieee80211_channel *chan, 3601 int duration, 3602 enum ieee80211_roc_type type); 3603 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 3604 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 3605 void (*get_ringparam)(struct ieee80211_hw *hw, 3606 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 3607 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 3608 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3609 const struct cfg80211_bitrate_mask *mask); 3610 void (*event_callback)(struct ieee80211_hw *hw, 3611 struct ieee80211_vif *vif, 3612 const struct ieee80211_event *event); 3613 3614 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 3615 struct ieee80211_sta *sta, 3616 u16 tids, int num_frames, 3617 enum ieee80211_frame_release_type reason, 3618 bool more_data); 3619 void (*release_buffered_frames)(struct ieee80211_hw *hw, 3620 struct ieee80211_sta *sta, 3621 u16 tids, int num_frames, 3622 enum ieee80211_frame_release_type reason, 3623 bool more_data); 3624 3625 int (*get_et_sset_count)(struct ieee80211_hw *hw, 3626 struct ieee80211_vif *vif, int sset); 3627 void (*get_et_stats)(struct ieee80211_hw *hw, 3628 struct ieee80211_vif *vif, 3629 struct ethtool_stats *stats, u64 *data); 3630 void (*get_et_strings)(struct ieee80211_hw *hw, 3631 struct ieee80211_vif *vif, 3632 u32 sset, u8 *data); 3633 3634 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 3635 struct ieee80211_vif *vif); 3636 3637 void (*mgd_protect_tdls_discover)(struct ieee80211_hw *hw, 3638 struct ieee80211_vif *vif); 3639 3640 int (*add_chanctx)(struct ieee80211_hw *hw, 3641 struct ieee80211_chanctx_conf *ctx); 3642 void (*remove_chanctx)(struct ieee80211_hw *hw, 3643 struct ieee80211_chanctx_conf *ctx); 3644 void (*change_chanctx)(struct ieee80211_hw *hw, 3645 struct ieee80211_chanctx_conf *ctx, 3646 u32 changed); 3647 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 3648 struct ieee80211_vif *vif, 3649 struct ieee80211_chanctx_conf *ctx); 3650 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 3651 struct ieee80211_vif *vif, 3652 struct ieee80211_chanctx_conf *ctx); 3653 int (*switch_vif_chanctx)(struct ieee80211_hw *hw, 3654 struct ieee80211_vif_chanctx_switch *vifs, 3655 int n_vifs, 3656 enum ieee80211_chanctx_switch_mode mode); 3657 3658 void (*reconfig_complete)(struct ieee80211_hw *hw, 3659 enum ieee80211_reconfig_type reconfig_type); 3660 3661 #if IS_ENABLED(CONFIG_IPV6) 3662 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 3663 struct ieee80211_vif *vif, 3664 struct inet6_dev *idev); 3665 #endif 3666 void (*channel_switch_beacon)(struct ieee80211_hw *hw, 3667 struct ieee80211_vif *vif, 3668 struct cfg80211_chan_def *chandef); 3669 int (*pre_channel_switch)(struct ieee80211_hw *hw, 3670 struct ieee80211_vif *vif, 3671 struct ieee80211_channel_switch *ch_switch); 3672 3673 int (*post_channel_switch)(struct ieee80211_hw *hw, 3674 struct ieee80211_vif *vif); 3675 3676 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3677 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3678 u32 (*get_expected_throughput)(struct ieee80211_hw *hw, 3679 struct ieee80211_sta *sta); 3680 int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3681 int *dbm); 3682 3683 int (*tdls_channel_switch)(struct ieee80211_hw *hw, 3684 struct ieee80211_vif *vif, 3685 struct ieee80211_sta *sta, u8 oper_class, 3686 struct cfg80211_chan_def *chandef, 3687 struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie); 3688 void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw, 3689 struct ieee80211_vif *vif, 3690 struct ieee80211_sta *sta); 3691 void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw, 3692 struct ieee80211_vif *vif, 3693 struct ieee80211_tdls_ch_sw_params *params); 3694 3695 void (*wake_tx_queue)(struct ieee80211_hw *hw, 3696 struct ieee80211_txq *txq); 3697 void (*sync_rx_queues)(struct ieee80211_hw *hw); 3698 3699 int (*start_nan)(struct ieee80211_hw *hw, 3700 struct ieee80211_vif *vif, 3701 struct cfg80211_nan_conf *conf); 3702 int (*stop_nan)(struct ieee80211_hw *hw, 3703 struct ieee80211_vif *vif); 3704 int (*nan_change_conf)(struct ieee80211_hw *hw, 3705 struct ieee80211_vif *vif, 3706 struct cfg80211_nan_conf *conf, u32 changes); 3707 int (*add_nan_func)(struct ieee80211_hw *hw, 3708 struct ieee80211_vif *vif, 3709 const struct cfg80211_nan_func *nan_func); 3710 void (*del_nan_func)(struct ieee80211_hw *hw, 3711 struct ieee80211_vif *vif, 3712 u8 instance_id); 3713 }; 3714 3715 /** 3716 * ieee80211_alloc_hw_nm - Allocate a new hardware device 3717 * 3718 * This must be called once for each hardware device. The returned pointer 3719 * must be used to refer to this device when calling other functions. 3720 * mac80211 allocates a private data area for the driver pointed to by 3721 * @priv in &struct ieee80211_hw, the size of this area is given as 3722 * @priv_data_len. 3723 * 3724 * @priv_data_len: length of private data 3725 * @ops: callbacks for this device 3726 * @requested_name: Requested name for this device. 3727 * NULL is valid value, and means use the default naming (phy%d) 3728 * 3729 * Return: A pointer to the new hardware device, or %NULL on error. 3730 */ 3731 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 3732 const struct ieee80211_ops *ops, 3733 const char *requested_name); 3734 3735 /** 3736 * ieee80211_alloc_hw - Allocate a new hardware device 3737 * 3738 * This must be called once for each hardware device. The returned pointer 3739 * must be used to refer to this device when calling other functions. 3740 * mac80211 allocates a private data area for the driver pointed to by 3741 * @priv in &struct ieee80211_hw, the size of this area is given as 3742 * @priv_data_len. 3743 * 3744 * @priv_data_len: length of private data 3745 * @ops: callbacks for this device 3746 * 3747 * Return: A pointer to the new hardware device, or %NULL on error. 3748 */ 3749 static inline 3750 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 3751 const struct ieee80211_ops *ops) 3752 { 3753 return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL); 3754 } 3755 3756 /** 3757 * ieee80211_register_hw - Register hardware device 3758 * 3759 * You must call this function before any other functions in 3760 * mac80211. Note that before a hardware can be registered, you 3761 * need to fill the contained wiphy's information. 3762 * 3763 * @hw: the device to register as returned by ieee80211_alloc_hw() 3764 * 3765 * Return: 0 on success. An error code otherwise. 3766 */ 3767 int ieee80211_register_hw(struct ieee80211_hw *hw); 3768 3769 /** 3770 * struct ieee80211_tpt_blink - throughput blink description 3771 * @throughput: throughput in Kbit/sec 3772 * @blink_time: blink time in milliseconds 3773 * (full cycle, ie. one off + one on period) 3774 */ 3775 struct ieee80211_tpt_blink { 3776 int throughput; 3777 int blink_time; 3778 }; 3779 3780 /** 3781 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 3782 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 3783 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 3784 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 3785 * interface is connected in some way, including being an AP 3786 */ 3787 enum ieee80211_tpt_led_trigger_flags { 3788 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 3789 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 3790 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 3791 }; 3792 3793 #ifdef CONFIG_MAC80211_LEDS 3794 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 3795 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 3796 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 3797 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 3798 const char * 3799 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, 3800 unsigned int flags, 3801 const struct ieee80211_tpt_blink *blink_table, 3802 unsigned int blink_table_len); 3803 #endif 3804 /** 3805 * ieee80211_get_tx_led_name - get name of TX LED 3806 * 3807 * mac80211 creates a transmit LED trigger for each wireless hardware 3808 * that can be used to drive LEDs if your driver registers a LED device. 3809 * This function returns the name (or %NULL if not configured for LEDs) 3810 * of the trigger so you can automatically link the LED device. 3811 * 3812 * @hw: the hardware to get the LED trigger name for 3813 * 3814 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3815 */ 3816 static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 3817 { 3818 #ifdef CONFIG_MAC80211_LEDS 3819 return __ieee80211_get_tx_led_name(hw); 3820 #else 3821 return NULL; 3822 #endif 3823 } 3824 3825 /** 3826 * ieee80211_get_rx_led_name - get name of RX LED 3827 * 3828 * mac80211 creates a receive LED trigger for each wireless hardware 3829 * that can be used to drive LEDs if your driver registers a LED device. 3830 * This function returns the name (or %NULL if not configured for LEDs) 3831 * of the trigger so you can automatically link the LED device. 3832 * 3833 * @hw: the hardware to get the LED trigger name for 3834 * 3835 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3836 */ 3837 static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 3838 { 3839 #ifdef CONFIG_MAC80211_LEDS 3840 return __ieee80211_get_rx_led_name(hw); 3841 #else 3842 return NULL; 3843 #endif 3844 } 3845 3846 /** 3847 * ieee80211_get_assoc_led_name - get name of association LED 3848 * 3849 * mac80211 creates a association LED trigger for each wireless hardware 3850 * that can be used to drive LEDs if your driver registers a LED device. 3851 * This function returns the name (or %NULL if not configured for LEDs) 3852 * of the trigger so you can automatically link the LED device. 3853 * 3854 * @hw: the hardware to get the LED trigger name for 3855 * 3856 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3857 */ 3858 static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 3859 { 3860 #ifdef CONFIG_MAC80211_LEDS 3861 return __ieee80211_get_assoc_led_name(hw); 3862 #else 3863 return NULL; 3864 #endif 3865 } 3866 3867 /** 3868 * ieee80211_get_radio_led_name - get name of radio LED 3869 * 3870 * mac80211 creates a radio change LED trigger for each wireless hardware 3871 * that can be used to drive LEDs if your driver registers a LED device. 3872 * This function returns the name (or %NULL if not configured for LEDs) 3873 * of the trigger so you can automatically link the LED device. 3874 * 3875 * @hw: the hardware to get the LED trigger name for 3876 * 3877 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 3878 */ 3879 static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 3880 { 3881 #ifdef CONFIG_MAC80211_LEDS 3882 return __ieee80211_get_radio_led_name(hw); 3883 #else 3884 return NULL; 3885 #endif 3886 } 3887 3888 /** 3889 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 3890 * @hw: the hardware to create the trigger for 3891 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 3892 * @blink_table: the blink table -- needs to be ordered by throughput 3893 * @blink_table_len: size of the blink table 3894 * 3895 * Return: %NULL (in case of error, or if no LED triggers are 3896 * configured) or the name of the new trigger. 3897 * 3898 * Note: This function must be called before ieee80211_register_hw(). 3899 */ 3900 static inline const char * 3901 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 3902 const struct ieee80211_tpt_blink *blink_table, 3903 unsigned int blink_table_len) 3904 { 3905 #ifdef CONFIG_MAC80211_LEDS 3906 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 3907 blink_table_len); 3908 #else 3909 return NULL; 3910 #endif 3911 } 3912 3913 /** 3914 * ieee80211_unregister_hw - Unregister a hardware device 3915 * 3916 * This function instructs mac80211 to free allocated resources 3917 * and unregister netdevices from the networking subsystem. 3918 * 3919 * @hw: the hardware to unregister 3920 */ 3921 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 3922 3923 /** 3924 * ieee80211_free_hw - free hardware descriptor 3925 * 3926 * This function frees everything that was allocated, including the 3927 * private data for the driver. You must call ieee80211_unregister_hw() 3928 * before calling this function. 3929 * 3930 * @hw: the hardware to free 3931 */ 3932 void ieee80211_free_hw(struct ieee80211_hw *hw); 3933 3934 /** 3935 * ieee80211_restart_hw - restart hardware completely 3936 * 3937 * Call this function when the hardware was restarted for some reason 3938 * (hardware error, ...) and the driver is unable to restore its state 3939 * by itself. mac80211 assumes that at this point the driver/hardware 3940 * is completely uninitialised and stopped, it starts the process by 3941 * calling the ->start() operation. The driver will need to reset all 3942 * internal state that it has prior to calling this function. 3943 * 3944 * @hw: the hardware to restart 3945 */ 3946 void ieee80211_restart_hw(struct ieee80211_hw *hw); 3947 3948 /** 3949 * ieee80211_rx_napi - receive frame from NAPI context 3950 * 3951 * Use this function to hand received frames to mac80211. The receive 3952 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3953 * paged @skb is used, the driver is recommended to put the ieee80211 3954 * header of the frame on the linear part of the @skb to avoid memory 3955 * allocation and/or memcpy by the stack. 3956 * 3957 * This function may not be called in IRQ context. Calls to this function 3958 * for a single hardware must be synchronized against each other. Calls to 3959 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3960 * mixed for a single hardware. Must not run concurrently with 3961 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3962 * 3963 * This function must be called with BHs disabled. 3964 * 3965 * @hw: the hardware this frame came in on 3966 * @sta: the station the frame was received from, or %NULL 3967 * @skb: the buffer to receive, owned by mac80211 after this call 3968 * @napi: the NAPI context 3969 */ 3970 void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 3971 struct sk_buff *skb, struct napi_struct *napi); 3972 3973 /** 3974 * ieee80211_rx - receive frame 3975 * 3976 * Use this function to hand received frames to mac80211. The receive 3977 * buffer in @skb must start with an IEEE 802.11 header. In case of a 3978 * paged @skb is used, the driver is recommended to put the ieee80211 3979 * header of the frame on the linear part of the @skb to avoid memory 3980 * allocation and/or memcpy by the stack. 3981 * 3982 * This function may not be called in IRQ context. Calls to this function 3983 * for a single hardware must be synchronized against each other. Calls to 3984 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 3985 * mixed for a single hardware. Must not run concurrently with 3986 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 3987 * 3988 * In process context use instead ieee80211_rx_ni(). 3989 * 3990 * @hw: the hardware this frame came in on 3991 * @skb: the buffer to receive, owned by mac80211 after this call 3992 */ 3993 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) 3994 { 3995 ieee80211_rx_napi(hw, NULL, skb, NULL); 3996 } 3997 3998 /** 3999 * ieee80211_rx_irqsafe - receive frame 4000 * 4001 * Like ieee80211_rx() but can be called in IRQ context 4002 * (internally defers to a tasklet.) 4003 * 4004 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 4005 * be mixed for a single hardware.Must not run concurrently with 4006 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 4007 * 4008 * @hw: the hardware this frame came in on 4009 * @skb: the buffer to receive, owned by mac80211 after this call 4010 */ 4011 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 4012 4013 /** 4014 * ieee80211_rx_ni - receive frame (in process context) 4015 * 4016 * Like ieee80211_rx() but can be called in process context 4017 * (internally disables bottom halves). 4018 * 4019 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 4020 * not be mixed for a single hardware. Must not run concurrently with 4021 * ieee80211_tx_status() or ieee80211_tx_status_ni(). 4022 * 4023 * @hw: the hardware this frame came in on 4024 * @skb: the buffer to receive, owned by mac80211 after this call 4025 */ 4026 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 4027 struct sk_buff *skb) 4028 { 4029 local_bh_disable(); 4030 ieee80211_rx(hw, skb); 4031 local_bh_enable(); 4032 } 4033 4034 /** 4035 * ieee80211_sta_ps_transition - PS transition for connected sta 4036 * 4037 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 4038 * flag set, use this function to inform mac80211 about a connected station 4039 * entering/leaving PS mode. 4040 * 4041 * This function may not be called in IRQ context or with softirqs enabled. 4042 * 4043 * Calls to this function for a single hardware must be synchronized against 4044 * each other. 4045 * 4046 * @sta: currently connected sta 4047 * @start: start or stop PS 4048 * 4049 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 4050 */ 4051 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 4052 4053 /** 4054 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 4055 * (in process context) 4056 * 4057 * Like ieee80211_sta_ps_transition() but can be called in process context 4058 * (internally disables bottom halves). Concurrent call restriction still 4059 * applies. 4060 * 4061 * @sta: currently connected sta 4062 * @start: start or stop PS 4063 * 4064 * Return: Like ieee80211_sta_ps_transition(). 4065 */ 4066 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 4067 bool start) 4068 { 4069 int ret; 4070 4071 local_bh_disable(); 4072 ret = ieee80211_sta_ps_transition(sta, start); 4073 local_bh_enable(); 4074 4075 return ret; 4076 } 4077 4078 /** 4079 * ieee80211_sta_pspoll - PS-Poll frame received 4080 * @sta: currently connected station 4081 * 4082 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4083 * use this function to inform mac80211 that a PS-Poll frame from a 4084 * connected station was received. 4085 * This must be used in conjunction with ieee80211_sta_ps_transition() 4086 * and possibly ieee80211_sta_uapsd_trigger(); calls to all three must 4087 * be serialized. 4088 */ 4089 void ieee80211_sta_pspoll(struct ieee80211_sta *sta); 4090 4091 /** 4092 * ieee80211_sta_uapsd_trigger - (potential) U-APSD trigger frame received 4093 * @sta: currently connected station 4094 * @tid: TID of the received (potential) trigger frame 4095 * 4096 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set, 4097 * use this function to inform mac80211 that a (potential) trigger frame 4098 * from a connected station was received. 4099 * This must be used in conjunction with ieee80211_sta_ps_transition() 4100 * and possibly ieee80211_sta_pspoll(); calls to all three must be 4101 * serialized. 4102 * %IEEE80211_NUM_TIDS can be passed as the tid if the tid is unknown. 4103 * In this case, mac80211 will not check that this tid maps to an AC 4104 * that is trigger enabled and assume that the caller did the proper 4105 * checks. 4106 */ 4107 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid); 4108 4109 /* 4110 * The TX headroom reserved by mac80211 for its own tx_status functions. 4111 * This is enough for the radiotap header. 4112 */ 4113 #define IEEE80211_TX_STATUS_HEADROOM 14 4114 4115 /** 4116 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 4117 * @sta: &struct ieee80211_sta pointer for the sleeping station 4118 * @tid: the TID that has buffered frames 4119 * @buffered: indicates whether or not frames are buffered for this TID 4120 * 4121 * If a driver buffers frames for a powersave station instead of passing 4122 * them back to mac80211 for retransmission, the station may still need 4123 * to be told that there are buffered frames via the TIM bit. 4124 * 4125 * This function informs mac80211 whether or not there are frames that are 4126 * buffered in the driver for a given TID; mac80211 can then use this data 4127 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 4128 * call! Beware of the locking!) 4129 * 4130 * If all frames are released to the station (due to PS-poll or uAPSD) 4131 * then the driver needs to inform mac80211 that there no longer are 4132 * frames buffered. However, when the station wakes up mac80211 assumes 4133 * that all buffered frames will be transmitted and clears this data, 4134 * drivers need to make sure they inform mac80211 about all buffered 4135 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 4136 * 4137 * Note that technically mac80211 only needs to know this per AC, not per 4138 * TID, but since driver buffering will inevitably happen per TID (since 4139 * it is related to aggregation) it is easier to make mac80211 map the 4140 * TID to the AC as required instead of keeping track in all drivers that 4141 * use this API. 4142 */ 4143 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 4144 u8 tid, bool buffered); 4145 4146 /** 4147 * ieee80211_get_tx_rates - get the selected transmit rates for a packet 4148 * 4149 * Call this function in a driver with per-packet rate selection support 4150 * to combine the rate info in the packet tx info with the most recent 4151 * rate selection table for the station entry. 4152 * 4153 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4154 * @sta: the receiver station to which this packet is sent. 4155 * @skb: the frame to be transmitted. 4156 * @dest: buffer for extracted rate/retry information 4157 * @max_rates: maximum number of rates to fetch 4158 */ 4159 void ieee80211_get_tx_rates(struct ieee80211_vif *vif, 4160 struct ieee80211_sta *sta, 4161 struct sk_buff *skb, 4162 struct ieee80211_tx_rate *dest, 4163 int max_rates); 4164 4165 /** 4166 * ieee80211_tx_status - transmit status callback 4167 * 4168 * Call this function for all transmitted frames after they have been 4169 * transmitted. It is permissible to not call this function for 4170 * multicast frames but this can affect statistics. 4171 * 4172 * This function may not be called in IRQ context. Calls to this function 4173 * for a single hardware must be synchronized against each other. Calls 4174 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 4175 * may not be mixed for a single hardware. Must not run concurrently with 4176 * ieee80211_rx() or ieee80211_rx_ni(). 4177 * 4178 * @hw: the hardware the frame was transmitted by 4179 * @skb: the frame that was transmitted, owned by mac80211 after this call 4180 */ 4181 void ieee80211_tx_status(struct ieee80211_hw *hw, 4182 struct sk_buff *skb); 4183 4184 /** 4185 * ieee80211_tx_status_noskb - transmit status callback without skb 4186 * 4187 * This function can be used as a replacement for ieee80211_tx_status 4188 * in drivers that cannot reliably map tx status information back to 4189 * specific skbs. 4190 * 4191 * Calls to this function for a single hardware must be synchronized 4192 * against each other. Calls to this function, ieee80211_tx_status_ni() 4193 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware. 4194 * 4195 * @hw: the hardware the frame was transmitted by 4196 * @sta: the receiver station to which this packet is sent 4197 * (NULL for multicast packets) 4198 * @info: tx status information 4199 */ 4200 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, 4201 struct ieee80211_sta *sta, 4202 struct ieee80211_tx_info *info); 4203 4204 /** 4205 * ieee80211_tx_status_ni - transmit status callback (in process context) 4206 * 4207 * Like ieee80211_tx_status() but can be called in process context. 4208 * 4209 * Calls to this function, ieee80211_tx_status() and 4210 * ieee80211_tx_status_irqsafe() may not be mixed 4211 * for a single hardware. 4212 * 4213 * @hw: the hardware the frame was transmitted by 4214 * @skb: the frame that was transmitted, owned by mac80211 after this call 4215 */ 4216 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 4217 struct sk_buff *skb) 4218 { 4219 local_bh_disable(); 4220 ieee80211_tx_status(hw, skb); 4221 local_bh_enable(); 4222 } 4223 4224 /** 4225 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 4226 * 4227 * Like ieee80211_tx_status() but can be called in IRQ context 4228 * (internally defers to a tasklet.) 4229 * 4230 * Calls to this function, ieee80211_tx_status() and 4231 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 4232 * 4233 * @hw: the hardware the frame was transmitted by 4234 * @skb: the frame that was transmitted, owned by mac80211 after this call 4235 */ 4236 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 4237 struct sk_buff *skb); 4238 4239 /** 4240 * ieee80211_report_low_ack - report non-responding station 4241 * 4242 * When operating in AP-mode, call this function to report a non-responding 4243 * connected STA. 4244 * 4245 * @sta: the non-responding connected sta 4246 * @num_packets: number of packets sent to @sta without a response 4247 */ 4248 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 4249 4250 #define IEEE80211_MAX_CSA_COUNTERS_NUM 2 4251 4252 /** 4253 * struct ieee80211_mutable_offsets - mutable beacon offsets 4254 * @tim_offset: position of TIM element 4255 * @tim_length: size of TIM element 4256 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets 4257 * to CSA counters. This array can contain zero values which 4258 * should be ignored. 4259 */ 4260 struct ieee80211_mutable_offsets { 4261 u16 tim_offset; 4262 u16 tim_length; 4263 4264 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM]; 4265 }; 4266 4267 /** 4268 * ieee80211_beacon_get_template - beacon template generation function 4269 * @hw: pointer obtained from ieee80211_alloc_hw(). 4270 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4271 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will 4272 * receive the offsets that may be updated by the driver. 4273 * 4274 * If the driver implements beaconing modes, it must use this function to 4275 * obtain the beacon template. 4276 * 4277 * This function should be used if the beacon frames are generated by the 4278 * device, and then the driver must use the returned beacon as the template 4279 * The driver or the device are responsible to update the DTIM and, when 4280 * applicable, the CSA count. 4281 * 4282 * The driver is responsible for freeing the returned skb. 4283 * 4284 * Return: The beacon template. %NULL on error. 4285 */ 4286 struct sk_buff * 4287 ieee80211_beacon_get_template(struct ieee80211_hw *hw, 4288 struct ieee80211_vif *vif, 4289 struct ieee80211_mutable_offsets *offs); 4290 4291 /** 4292 * ieee80211_beacon_get_tim - beacon generation function 4293 * @hw: pointer obtained from ieee80211_alloc_hw(). 4294 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4295 * @tim_offset: pointer to variable that will receive the TIM IE offset. 4296 * Set to 0 if invalid (in non-AP modes). 4297 * @tim_length: pointer to variable that will receive the TIM IE length, 4298 * (including the ID and length bytes!). 4299 * Set to 0 if invalid (in non-AP modes). 4300 * 4301 * If the driver implements beaconing modes, it must use this function to 4302 * obtain the beacon frame. 4303 * 4304 * If the beacon frames are generated by the host system (i.e., not in 4305 * hardware/firmware), the driver uses this function to get each beacon 4306 * frame from mac80211 -- it is responsible for calling this function exactly 4307 * once before the beacon is needed (e.g. based on hardware interrupt). 4308 * 4309 * The driver is responsible for freeing the returned skb. 4310 * 4311 * Return: The beacon template. %NULL on error. 4312 */ 4313 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 4314 struct ieee80211_vif *vif, 4315 u16 *tim_offset, u16 *tim_length); 4316 4317 /** 4318 * ieee80211_beacon_get - beacon generation function 4319 * @hw: pointer obtained from ieee80211_alloc_hw(). 4320 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4321 * 4322 * See ieee80211_beacon_get_tim(). 4323 * 4324 * Return: See ieee80211_beacon_get_tim(). 4325 */ 4326 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 4327 struct ieee80211_vif *vif) 4328 { 4329 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 4330 } 4331 4332 /** 4333 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter 4334 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4335 * 4336 * The csa counter should be updated after each beacon transmission. 4337 * This function is called implicitly when 4338 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the 4339 * beacon frames are generated by the device, the driver should call this 4340 * function after each beacon transmission to sync mac80211's csa counters. 4341 * 4342 * Return: new csa counter value 4343 */ 4344 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif); 4345 4346 /** 4347 * ieee80211_csa_finish - notify mac80211 about channel switch 4348 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4349 * 4350 * After a channel switch announcement was scheduled and the counter in this 4351 * announcement hits 1, this function must be called by the driver to 4352 * notify mac80211 that the channel can be changed. 4353 */ 4354 void ieee80211_csa_finish(struct ieee80211_vif *vif); 4355 4356 /** 4357 * ieee80211_csa_is_complete - find out if counters reached 1 4358 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4359 * 4360 * This function returns whether the channel switch counters reached zero. 4361 */ 4362 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif); 4363 4364 4365 /** 4366 * ieee80211_proberesp_get - retrieve a Probe Response template 4367 * @hw: pointer obtained from ieee80211_alloc_hw(). 4368 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4369 * 4370 * Creates a Probe Response template which can, for example, be uploaded to 4371 * hardware. The destination address should be set by the caller. 4372 * 4373 * Can only be called in AP mode. 4374 * 4375 * Return: The Probe Response template. %NULL on error. 4376 */ 4377 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 4378 struct ieee80211_vif *vif); 4379 4380 /** 4381 * ieee80211_pspoll_get - retrieve a PS Poll template 4382 * @hw: pointer obtained from ieee80211_alloc_hw(). 4383 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4384 * 4385 * Creates a PS Poll a template which can, for example, uploaded to 4386 * hardware. The template must be updated after association so that correct 4387 * AID, BSSID and MAC address is used. 4388 * 4389 * Note: Caller (or hardware) is responsible for setting the 4390 * &IEEE80211_FCTL_PM bit. 4391 * 4392 * Return: The PS Poll template. %NULL on error. 4393 */ 4394 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 4395 struct ieee80211_vif *vif); 4396 4397 /** 4398 * ieee80211_nullfunc_get - retrieve a nullfunc template 4399 * @hw: pointer obtained from ieee80211_alloc_hw(). 4400 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4401 * 4402 * Creates a Nullfunc template which can, for example, uploaded to 4403 * hardware. The template must be updated after association so that correct 4404 * BSSID and address is used. 4405 * 4406 * Note: Caller (or hardware) is responsible for setting the 4407 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 4408 * 4409 * Return: The nullfunc template. %NULL on error. 4410 */ 4411 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 4412 struct ieee80211_vif *vif); 4413 4414 /** 4415 * ieee80211_probereq_get - retrieve a Probe Request template 4416 * @hw: pointer obtained from ieee80211_alloc_hw(). 4417 * @src_addr: source MAC address 4418 * @ssid: SSID buffer 4419 * @ssid_len: length of SSID 4420 * @tailroom: tailroom to reserve at end of SKB for IEs 4421 * 4422 * Creates a Probe Request template which can, for example, be uploaded to 4423 * hardware. 4424 * 4425 * Return: The Probe Request template. %NULL on error. 4426 */ 4427 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 4428 const u8 *src_addr, 4429 const u8 *ssid, size_t ssid_len, 4430 size_t tailroom); 4431 4432 /** 4433 * ieee80211_rts_get - RTS frame generation function 4434 * @hw: pointer obtained from ieee80211_alloc_hw(). 4435 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4436 * @frame: pointer to the frame that is going to be protected by the RTS. 4437 * @frame_len: the frame length (in octets). 4438 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4439 * @rts: The buffer where to store the RTS frame. 4440 * 4441 * If the RTS frames are generated by the host system (i.e., not in 4442 * hardware/firmware), the low-level driver uses this function to receive 4443 * the next RTS frame from the 802.11 code. The low-level is responsible 4444 * for calling this function before and RTS frame is needed. 4445 */ 4446 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 4447 const void *frame, size_t frame_len, 4448 const struct ieee80211_tx_info *frame_txctl, 4449 struct ieee80211_rts *rts); 4450 4451 /** 4452 * ieee80211_rts_duration - Get the duration field for an RTS frame 4453 * @hw: pointer obtained from ieee80211_alloc_hw(). 4454 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4455 * @frame_len: the length of the frame that is going to be protected by the RTS. 4456 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4457 * 4458 * If the RTS is generated in firmware, but the host system must provide 4459 * the duration field, the low-level driver uses this function to receive 4460 * the duration field value in little-endian byteorder. 4461 * 4462 * Return: The duration. 4463 */ 4464 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 4465 struct ieee80211_vif *vif, size_t frame_len, 4466 const struct ieee80211_tx_info *frame_txctl); 4467 4468 /** 4469 * ieee80211_ctstoself_get - CTS-to-self frame generation function 4470 * @hw: pointer obtained from ieee80211_alloc_hw(). 4471 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4472 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 4473 * @frame_len: the frame length (in octets). 4474 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4475 * @cts: The buffer where to store the CTS-to-self frame. 4476 * 4477 * If the CTS-to-self frames are generated by the host system (i.e., not in 4478 * hardware/firmware), the low-level driver uses this function to receive 4479 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 4480 * for calling this function before and CTS-to-self frame is needed. 4481 */ 4482 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 4483 struct ieee80211_vif *vif, 4484 const void *frame, size_t frame_len, 4485 const struct ieee80211_tx_info *frame_txctl, 4486 struct ieee80211_cts *cts); 4487 4488 /** 4489 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 4490 * @hw: pointer obtained from ieee80211_alloc_hw(). 4491 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4492 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 4493 * @frame_txctl: &struct ieee80211_tx_info of the frame. 4494 * 4495 * If the CTS-to-self is generated in firmware, but the host system must provide 4496 * the duration field, the low-level driver uses this function to receive 4497 * the duration field value in little-endian byteorder. 4498 * 4499 * Return: The duration. 4500 */ 4501 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 4502 struct ieee80211_vif *vif, 4503 size_t frame_len, 4504 const struct ieee80211_tx_info *frame_txctl); 4505 4506 /** 4507 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 4508 * @hw: pointer obtained from ieee80211_alloc_hw(). 4509 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4510 * @band: the band to calculate the frame duration on 4511 * @frame_len: the length of the frame. 4512 * @rate: the rate at which the frame is going to be transmitted. 4513 * 4514 * Calculate the duration field of some generic frame, given its 4515 * length and transmission rate (in 100kbps). 4516 * 4517 * Return: The duration. 4518 */ 4519 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 4520 struct ieee80211_vif *vif, 4521 enum nl80211_band band, 4522 size_t frame_len, 4523 struct ieee80211_rate *rate); 4524 4525 /** 4526 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 4527 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4528 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4529 * 4530 * Function for accessing buffered broadcast and multicast frames. If 4531 * hardware/firmware does not implement buffering of broadcast/multicast 4532 * frames when power saving is used, 802.11 code buffers them in the host 4533 * memory. The low-level driver uses this function to fetch next buffered 4534 * frame. In most cases, this is used when generating beacon frame. 4535 * 4536 * Return: A pointer to the next buffered skb or NULL if no more buffered 4537 * frames are available. 4538 * 4539 * Note: buffered frames are returned only after DTIM beacon frame was 4540 * generated with ieee80211_beacon_get() and the low-level driver must thus 4541 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 4542 * NULL if the previous generated beacon was not DTIM, so the low-level driver 4543 * does not need to check for DTIM beacons separately and should be able to 4544 * use common code for all beacons. 4545 */ 4546 struct sk_buff * 4547 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 4548 4549 /** 4550 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 4551 * 4552 * This function returns the TKIP phase 1 key for the given IV32. 4553 * 4554 * @keyconf: the parameter passed with the set key 4555 * @iv32: IV32 to get the P1K for 4556 * @p1k: a buffer to which the key will be written, as 5 u16 values 4557 */ 4558 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 4559 u32 iv32, u16 *p1k); 4560 4561 /** 4562 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 4563 * 4564 * This function returns the TKIP phase 1 key for the IV32 taken 4565 * from the given packet. 4566 * 4567 * @keyconf: the parameter passed with the set key 4568 * @skb: the packet to take the IV32 value from that will be encrypted 4569 * with this P1K 4570 * @p1k: a buffer to which the key will be written, as 5 u16 values 4571 */ 4572 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 4573 struct sk_buff *skb, u16 *p1k) 4574 { 4575 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 4576 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 4577 u32 iv32 = get_unaligned_le32(&data[4]); 4578 4579 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 4580 } 4581 4582 /** 4583 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 4584 * 4585 * This function returns the TKIP phase 1 key for the given IV32 4586 * and transmitter address. 4587 * 4588 * @keyconf: the parameter passed with the set key 4589 * @ta: TA that will be used with the key 4590 * @iv32: IV32 to get the P1K for 4591 * @p1k: a buffer to which the key will be written, as 5 u16 values 4592 */ 4593 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 4594 const u8 *ta, u32 iv32, u16 *p1k); 4595 4596 /** 4597 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 4598 * 4599 * This function computes the TKIP RC4 key for the IV values 4600 * in the packet. 4601 * 4602 * @keyconf: the parameter passed with the set key 4603 * @skb: the packet to take the IV32/IV16 values from that will be 4604 * encrypted with this key 4605 * @p2k: a buffer to which the key will be written, 16 bytes 4606 */ 4607 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 4608 struct sk_buff *skb, u8 *p2k); 4609 4610 /** 4611 * ieee80211_tkip_add_iv - write TKIP IV and Ext. IV to pos 4612 * 4613 * @pos: start of crypto header 4614 * @keyconf: the parameter passed with the set key 4615 * @pn: PN to add 4616 * 4617 * Returns: pointer to the octet following IVs (i.e. beginning of 4618 * the packet payload) 4619 * 4620 * This function writes the tkip IV value to pos (which should 4621 * point to the crypto header) 4622 */ 4623 u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key_conf *keyconf, u64 pn); 4624 4625 /** 4626 * ieee80211_get_key_rx_seq - get key RX sequence counter 4627 * 4628 * @keyconf: the parameter passed with the set key 4629 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4630 * the value on TID 0 is also used for non-QoS frames. For 4631 * CMAC, only TID 0 is valid. 4632 * @seq: buffer to receive the sequence data 4633 * 4634 * This function allows a driver to retrieve the current RX IV/PNs 4635 * for the given key. It must not be called if IV checking is done 4636 * by the device and not by mac80211. 4637 * 4638 * Note that this function may only be called when no RX processing 4639 * can be done concurrently. 4640 */ 4641 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 4642 int tid, struct ieee80211_key_seq *seq); 4643 4644 /** 4645 * ieee80211_set_key_rx_seq - set key RX sequence counter 4646 * 4647 * @keyconf: the parameter passed with the set key 4648 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only); 4649 * the value on TID 0 is also used for non-QoS frames. For 4650 * CMAC, only TID 0 is valid. 4651 * @seq: new sequence data 4652 * 4653 * This function allows a driver to set the current RX IV/PNs for the 4654 * given key. This is useful when resuming from WoWLAN sleep and GTK 4655 * rekey may have been done while suspended. It should not be called 4656 * if IV checking is done by the device and not by mac80211. 4657 * 4658 * Note that this function may only be called when no RX processing 4659 * can be done concurrently. 4660 */ 4661 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf, 4662 int tid, struct ieee80211_key_seq *seq); 4663 4664 /** 4665 * ieee80211_remove_key - remove the given key 4666 * @keyconf: the parameter passed with the set key 4667 * 4668 * Remove the given key. If the key was uploaded to the hardware at the 4669 * time this function is called, it is not deleted in the hardware but 4670 * instead assumed to have been removed already. 4671 * 4672 * Note that due to locking considerations this function can (currently) 4673 * only be called during key iteration (ieee80211_iter_keys().) 4674 */ 4675 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf); 4676 4677 /** 4678 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN 4679 * @vif: the virtual interface to add the key on 4680 * @keyconf: new key data 4681 * 4682 * When GTK rekeying was done while the system was suspended, (a) new 4683 * key(s) will be available. These will be needed by mac80211 for proper 4684 * RX processing, so this function allows setting them. 4685 * 4686 * The function returns the newly allocated key structure, which will 4687 * have similar contents to the passed key configuration but point to 4688 * mac80211-owned memory. In case of errors, the function returns an 4689 * ERR_PTR(), use IS_ERR() etc. 4690 * 4691 * Note that this function assumes the key isn't added to hardware 4692 * acceleration, so no TX will be done with the key. Since it's a GTK 4693 * on managed (station) networks, this is true anyway. If the driver 4694 * calls this function from the resume callback and subsequently uses 4695 * the return code 1 to reconfigure the device, this key will be part 4696 * of the reconfiguration. 4697 * 4698 * Note that the driver should also call ieee80211_set_key_rx_seq() 4699 * for the new key for each TID to set up sequence counters properly. 4700 * 4701 * IMPORTANT: If this replaces a key that is present in the hardware, 4702 * then it will attempt to remove it during this call. In many cases 4703 * this isn't what you want, so call ieee80211_remove_key() first for 4704 * the key that's being replaced. 4705 */ 4706 struct ieee80211_key_conf * 4707 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif, 4708 struct ieee80211_key_conf *keyconf); 4709 4710 /** 4711 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 4712 * @vif: virtual interface the rekeying was done on 4713 * @bssid: The BSSID of the AP, for checking association 4714 * @replay_ctr: the new replay counter after GTK rekeying 4715 * @gfp: allocation flags 4716 */ 4717 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 4718 const u8 *replay_ctr, gfp_t gfp); 4719 4720 /** 4721 * ieee80211_wake_queue - wake specific queue 4722 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4723 * @queue: queue number (counted from zero). 4724 * 4725 * Drivers should use this function instead of netif_wake_queue. 4726 */ 4727 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 4728 4729 /** 4730 * ieee80211_stop_queue - stop specific queue 4731 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4732 * @queue: queue number (counted from zero). 4733 * 4734 * Drivers should use this function instead of netif_stop_queue. 4735 */ 4736 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 4737 4738 /** 4739 * ieee80211_queue_stopped - test status of the queue 4740 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4741 * @queue: queue number (counted from zero). 4742 * 4743 * Drivers should use this function instead of netif_stop_queue. 4744 * 4745 * Return: %true if the queue is stopped. %false otherwise. 4746 */ 4747 4748 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 4749 4750 /** 4751 * ieee80211_stop_queues - stop all queues 4752 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4753 * 4754 * Drivers should use this function instead of netif_stop_queue. 4755 */ 4756 void ieee80211_stop_queues(struct ieee80211_hw *hw); 4757 4758 /** 4759 * ieee80211_wake_queues - wake all queues 4760 * @hw: pointer as obtained from ieee80211_alloc_hw(). 4761 * 4762 * Drivers should use this function instead of netif_wake_queue. 4763 */ 4764 void ieee80211_wake_queues(struct ieee80211_hw *hw); 4765 4766 /** 4767 * ieee80211_scan_completed - completed hardware scan 4768 * 4769 * When hardware scan offload is used (i.e. the hw_scan() callback is 4770 * assigned) this function needs to be called by the driver to notify 4771 * mac80211 that the scan finished. This function can be called from 4772 * any context, including hardirq context. 4773 * 4774 * @hw: the hardware that finished the scan 4775 * @info: information about the completed scan 4776 */ 4777 void ieee80211_scan_completed(struct ieee80211_hw *hw, 4778 struct cfg80211_scan_info *info); 4779 4780 /** 4781 * ieee80211_sched_scan_results - got results from scheduled scan 4782 * 4783 * When a scheduled scan is running, this function needs to be called by the 4784 * driver whenever there are new scan results available. 4785 * 4786 * @hw: the hardware that is performing scheduled scans 4787 */ 4788 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 4789 4790 /** 4791 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 4792 * 4793 * When a scheduled scan is running, this function can be called by 4794 * the driver if it needs to stop the scan to perform another task. 4795 * Usual scenarios are drivers that cannot continue the scheduled scan 4796 * while associating, for instance. 4797 * 4798 * @hw: the hardware that is performing scheduled scans 4799 */ 4800 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 4801 4802 /** 4803 * enum ieee80211_interface_iteration_flags - interface iteration flags 4804 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 4805 * been added to the driver; However, note that during hardware 4806 * reconfiguration (after restart_hw) it will iterate over a new 4807 * interface and over all the existing interfaces even if they 4808 * haven't been re-added to the driver yet. 4809 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 4810 * interfaces, even if they haven't been re-added to the driver yet. 4811 * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up). 4812 */ 4813 enum ieee80211_interface_iteration_flags { 4814 IEEE80211_IFACE_ITER_NORMAL = 0, 4815 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 4816 IEEE80211_IFACE_ITER_ACTIVE = BIT(1), 4817 }; 4818 4819 /** 4820 * ieee80211_iterate_interfaces - iterate interfaces 4821 * 4822 * This function iterates over the interfaces associated with a given 4823 * hardware and calls the callback for them. This includes active as well as 4824 * inactive interfaces. This function allows the iterator function to sleep. 4825 * Will iterate over a new interface during add_interface(). 4826 * 4827 * @hw: the hardware struct of which the interfaces should be iterated over 4828 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4829 * @iterator: the iterator function to call 4830 * @data: first argument of the iterator function 4831 */ 4832 void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4833 void (*iterator)(void *data, u8 *mac, 4834 struct ieee80211_vif *vif), 4835 void *data); 4836 4837 /** 4838 * ieee80211_iterate_active_interfaces - iterate active interfaces 4839 * 4840 * This function iterates over the interfaces associated with a given 4841 * hardware that are currently active and calls the callback for them. 4842 * This function allows the iterator function to sleep, when the iterator 4843 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 4844 * be used. 4845 * Does not iterate over a new interface during add_interface(). 4846 * 4847 * @hw: the hardware struct of which the interfaces should be iterated over 4848 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4849 * @iterator: the iterator function to call 4850 * @data: first argument of the iterator function 4851 */ 4852 static inline void 4853 ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags, 4854 void (*iterator)(void *data, u8 *mac, 4855 struct ieee80211_vif *vif), 4856 void *data) 4857 { 4858 ieee80211_iterate_interfaces(hw, 4859 iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 4860 iterator, data); 4861 } 4862 4863 /** 4864 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 4865 * 4866 * This function iterates over the interfaces associated with a given 4867 * hardware that are currently active and calls the callback for them. 4868 * This function requires the iterator callback function to be atomic, 4869 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 4870 * Does not iterate over a new interface during add_interface(). 4871 * 4872 * @hw: the hardware struct of which the interfaces should be iterated over 4873 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4874 * @iterator: the iterator function to call, cannot sleep 4875 * @data: first argument of the iterator function 4876 */ 4877 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 4878 u32 iter_flags, 4879 void (*iterator)(void *data, 4880 u8 *mac, 4881 struct ieee80211_vif *vif), 4882 void *data); 4883 4884 /** 4885 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces 4886 * 4887 * This function iterates over the interfaces associated with a given 4888 * hardware that are currently active and calls the callback for them. 4889 * This version can only be used while holding the RTNL. 4890 * 4891 * @hw: the hardware struct of which the interfaces should be iterated over 4892 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 4893 * @iterator: the iterator function to call, cannot sleep 4894 * @data: first argument of the iterator function 4895 */ 4896 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw, 4897 u32 iter_flags, 4898 void (*iterator)(void *data, 4899 u8 *mac, 4900 struct ieee80211_vif *vif), 4901 void *data); 4902 4903 /** 4904 * ieee80211_iterate_stations_atomic - iterate stations 4905 * 4906 * This function iterates over all stations associated with a given 4907 * hardware that are currently uploaded to the driver and calls the callback 4908 * function for them. 4909 * This function requires the iterator callback function to be atomic, 4910 * 4911 * @hw: the hardware struct of which the interfaces should be iterated over 4912 * @iterator: the iterator function to call, cannot sleep 4913 * @data: first argument of the iterator function 4914 */ 4915 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 4916 void (*iterator)(void *data, 4917 struct ieee80211_sta *sta), 4918 void *data); 4919 /** 4920 * ieee80211_queue_work - add work onto the mac80211 workqueue 4921 * 4922 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 4923 * This helper ensures drivers are not queueing work when they should not be. 4924 * 4925 * @hw: the hardware struct for the interface we are adding work for 4926 * @work: the work we want to add onto the mac80211 workqueue 4927 */ 4928 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 4929 4930 /** 4931 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 4932 * 4933 * Drivers and mac80211 use this to queue delayed work onto the mac80211 4934 * workqueue. 4935 * 4936 * @hw: the hardware struct for the interface we are adding work for 4937 * @dwork: delayable work to queue onto the mac80211 workqueue 4938 * @delay: number of jiffies to wait before queueing 4939 */ 4940 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 4941 struct delayed_work *dwork, 4942 unsigned long delay); 4943 4944 /** 4945 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 4946 * @sta: the station for which to start a BA session 4947 * @tid: the TID to BA on. 4948 * @timeout: session timeout value (in TUs) 4949 * 4950 * Return: success if addBA request was sent, failure otherwise 4951 * 4952 * Although mac80211/low level driver/user space application can estimate 4953 * the need to start aggregation on a certain RA/TID, the session level 4954 * will be managed by the mac80211. 4955 */ 4956 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 4957 u16 timeout); 4958 4959 /** 4960 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 4961 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4962 * @ra: receiver address of the BA session recipient. 4963 * @tid: the TID to BA on. 4964 * 4965 * This function must be called by low level driver once it has 4966 * finished with preparations for the BA session. It can be called 4967 * from any context. 4968 */ 4969 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4970 u16 tid); 4971 4972 /** 4973 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 4974 * @sta: the station whose BA session to stop 4975 * @tid: the TID to stop BA. 4976 * 4977 * Return: negative error if the TID is invalid, or no aggregation active 4978 * 4979 * Although mac80211/low level driver/user space application can estimate 4980 * the need to stop aggregation on a certain RA/TID, the session level 4981 * will be managed by the mac80211. 4982 */ 4983 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 4984 4985 /** 4986 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 4987 * @vif: &struct ieee80211_vif pointer from the add_interface callback 4988 * @ra: receiver address of the BA session recipient. 4989 * @tid: the desired TID to BA on. 4990 * 4991 * This function must be called by low level driver once it has 4992 * finished with preparations for the BA session tear down. It 4993 * can be called from any context. 4994 */ 4995 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 4996 u16 tid); 4997 4998 /** 4999 * ieee80211_find_sta - find a station 5000 * 5001 * @vif: virtual interface to look for station on 5002 * @addr: station's address 5003 * 5004 * Return: The station, if found. %NULL otherwise. 5005 * 5006 * Note: This function must be called under RCU lock and the 5007 * resulting pointer is only valid under RCU lock as well. 5008 */ 5009 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 5010 const u8 *addr); 5011 5012 /** 5013 * ieee80211_find_sta_by_ifaddr - find a station on hardware 5014 * 5015 * @hw: pointer as obtained from ieee80211_alloc_hw() 5016 * @addr: remote station's address 5017 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 5018 * 5019 * Return: The station, if found. %NULL otherwise. 5020 * 5021 * Note: This function must be called under RCU lock and the 5022 * resulting pointer is only valid under RCU lock as well. 5023 * 5024 * NOTE: You may pass NULL for localaddr, but then you will just get 5025 * the first STA that matches the remote address 'addr'. 5026 * We can have multiple STA associated with multiple 5027 * logical stations (e.g. consider a station connecting to another 5028 * BSSID on the same AP hardware without disconnecting first). 5029 * In this case, the result of this method with localaddr NULL 5030 * is not reliable. 5031 * 5032 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 5033 */ 5034 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 5035 const u8 *addr, 5036 const u8 *localaddr); 5037 5038 /** 5039 * ieee80211_sta_block_awake - block station from waking up 5040 * @hw: the hardware 5041 * @pubsta: the station 5042 * @block: whether to block or unblock 5043 * 5044 * Some devices require that all frames that are on the queues 5045 * for a specific station that went to sleep are flushed before 5046 * a poll response or frames after the station woke up can be 5047 * delivered to that it. Note that such frames must be rejected 5048 * by the driver as filtered, with the appropriate status flag. 5049 * 5050 * This function allows implementing this mode in a race-free 5051 * manner. 5052 * 5053 * To do this, a driver must keep track of the number of frames 5054 * still enqueued for a specific station. If this number is not 5055 * zero when the station goes to sleep, the driver must call 5056 * this function to force mac80211 to consider the station to 5057 * be asleep regardless of the station's actual state. Once the 5058 * number of outstanding frames reaches zero, the driver must 5059 * call this function again to unblock the station. That will 5060 * cause mac80211 to be able to send ps-poll responses, and if 5061 * the station queried in the meantime then frames will also 5062 * be sent out as a result of this. Additionally, the driver 5063 * will be notified that the station woke up some time after 5064 * it is unblocked, regardless of whether the station actually 5065 * woke up while blocked or not. 5066 */ 5067 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 5068 struct ieee80211_sta *pubsta, bool block); 5069 5070 /** 5071 * ieee80211_sta_eosp - notify mac80211 about end of SP 5072 * @pubsta: the station 5073 * 5074 * When a device transmits frames in a way that it can't tell 5075 * mac80211 in the TX status about the EOSP, it must clear the 5076 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 5077 * This applies for PS-Poll as well as uAPSD. 5078 * 5079 * Note that just like with _tx_status() and _rx() drivers must 5080 * not mix calls to irqsafe/non-irqsafe versions, this function 5081 * must not be mixed with those either. Use the all irqsafe, or 5082 * all non-irqsafe, don't mix! 5083 * 5084 * NB: the _irqsafe version of this function doesn't exist, no 5085 * driver needs it right now. Don't call this function if 5086 * you'd need the _irqsafe version, look at the git history 5087 * and restore the _irqsafe version! 5088 */ 5089 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta); 5090 5091 /** 5092 * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP 5093 * @pubsta: the station 5094 * @tid: the tid of the NDP 5095 * 5096 * Sometimes the device understands that it needs to close 5097 * the Service Period unexpectedly. This can happen when 5098 * sending frames that are filling holes in the BA window. 5099 * In this case, the device can ask mac80211 to send a 5100 * Nullfunc frame with EOSP set. When that happens, the 5101 * driver must have called ieee80211_sta_set_buffered() to 5102 * let mac80211 know that there are no buffered frames any 5103 * more, otherwise mac80211 will get the more_data bit wrong. 5104 * The low level driver must have made sure that the frame 5105 * will be sent despite the station being in power-save. 5106 * Mac80211 won't call allow_buffered_frames(). 5107 * Note that calling this function, doesn't exempt the driver 5108 * from closing the EOSP properly, it will still have to call 5109 * ieee80211_sta_eosp when the NDP is sent. 5110 */ 5111 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid); 5112 5113 /** 5114 * ieee80211_iter_keys - iterate keys programmed into the device 5115 * @hw: pointer obtained from ieee80211_alloc_hw() 5116 * @vif: virtual interface to iterate, may be %NULL for all 5117 * @iter: iterator function that will be called for each key 5118 * @iter_data: custom data to pass to the iterator function 5119 * 5120 * This function can be used to iterate all the keys known to 5121 * mac80211, even those that weren't previously programmed into 5122 * the device. This is intended for use in WoWLAN if the device 5123 * needs reprogramming of the keys during suspend. Note that due 5124 * to locking reasons, it is also only safe to call this at few 5125 * spots since it must hold the RTNL and be able to sleep. 5126 * 5127 * The order in which the keys are iterated matches the order 5128 * in which they were originally installed and handed to the 5129 * set_key callback. 5130 */ 5131 void ieee80211_iter_keys(struct ieee80211_hw *hw, 5132 struct ieee80211_vif *vif, 5133 void (*iter)(struct ieee80211_hw *hw, 5134 struct ieee80211_vif *vif, 5135 struct ieee80211_sta *sta, 5136 struct ieee80211_key_conf *key, 5137 void *data), 5138 void *iter_data); 5139 5140 /** 5141 * ieee80211_iter_keys_rcu - iterate keys programmed into the device 5142 * @hw: pointer obtained from ieee80211_alloc_hw() 5143 * @vif: virtual interface to iterate, may be %NULL for all 5144 * @iter: iterator function that will be called for each key 5145 * @iter_data: custom data to pass to the iterator function 5146 * 5147 * This function can be used to iterate all the keys known to 5148 * mac80211, even those that weren't previously programmed into 5149 * the device. Note that due to locking reasons, keys of station 5150 * in removal process will be skipped. 5151 * 5152 * This function requires being called in an RCU critical section, 5153 * and thus iter must be atomic. 5154 */ 5155 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw, 5156 struct ieee80211_vif *vif, 5157 void (*iter)(struct ieee80211_hw *hw, 5158 struct ieee80211_vif *vif, 5159 struct ieee80211_sta *sta, 5160 struct ieee80211_key_conf *key, 5161 void *data), 5162 void *iter_data); 5163 5164 /** 5165 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 5166 * @hw: pointre obtained from ieee80211_alloc_hw(). 5167 * @iter: iterator function 5168 * @iter_data: data passed to iterator function 5169 * 5170 * Iterate all active channel contexts. This function is atomic and 5171 * doesn't acquire any locks internally that might be held in other 5172 * places while calling into the driver. 5173 * 5174 * The iterator will not find a context that's being added (during 5175 * the driver callback to add it) but will find it while it's being 5176 * removed. 5177 * 5178 * Note that during hardware restart, all contexts that existed 5179 * before the restart are considered already present so will be 5180 * found while iterating, whether they've been re-added already 5181 * or not. 5182 */ 5183 void ieee80211_iter_chan_contexts_atomic( 5184 struct ieee80211_hw *hw, 5185 void (*iter)(struct ieee80211_hw *hw, 5186 struct ieee80211_chanctx_conf *chanctx_conf, 5187 void *data), 5188 void *iter_data); 5189 5190 /** 5191 * ieee80211_ap_probereq_get - retrieve a Probe Request template 5192 * @hw: pointer obtained from ieee80211_alloc_hw(). 5193 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5194 * 5195 * Creates a Probe Request template which can, for example, be uploaded to 5196 * hardware. The template is filled with bssid, ssid and supported rate 5197 * information. This function must only be called from within the 5198 * .bss_info_changed callback function and only in managed mode. The function 5199 * is only useful when the interface is associated, otherwise it will return 5200 * %NULL. 5201 * 5202 * Return: The Probe Request template. %NULL on error. 5203 */ 5204 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 5205 struct ieee80211_vif *vif); 5206 5207 /** 5208 * ieee80211_beacon_loss - inform hardware does not receive beacons 5209 * 5210 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5211 * 5212 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 5213 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 5214 * hardware is not receiving beacons with this function. 5215 */ 5216 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 5217 5218 /** 5219 * ieee80211_connection_loss - inform hardware has lost connection to the AP 5220 * 5221 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5222 * 5223 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 5224 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 5225 * needs to inform if the connection to the AP has been lost. 5226 * The function may also be called if the connection needs to be terminated 5227 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 5228 * 5229 * This function will cause immediate change to disassociated state, 5230 * without connection recovery attempts. 5231 */ 5232 void ieee80211_connection_loss(struct ieee80211_vif *vif); 5233 5234 /** 5235 * ieee80211_resume_disconnect - disconnect from AP after resume 5236 * 5237 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5238 * 5239 * Instructs mac80211 to disconnect from the AP after resume. 5240 * Drivers can use this after WoWLAN if they know that the 5241 * connection cannot be kept up, for example because keys were 5242 * used while the device was asleep but the replay counters or 5243 * similar cannot be retrieved from the device during resume. 5244 * 5245 * Note that due to implementation issues, if the driver uses 5246 * the reconfiguration functionality during resume the interface 5247 * will still be added as associated first during resume and then 5248 * disconnect normally later. 5249 * 5250 * This function can only be called from the resume callback and 5251 * the driver must not be holding any of its own locks while it 5252 * calls this function, or at least not any locks it needs in the 5253 * key configuration paths (if it supports HW crypto). 5254 */ 5255 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 5256 5257 /** 5258 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 5259 * rssi threshold triggered 5260 * 5261 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5262 * @rssi_event: the RSSI trigger event type 5263 * @gfp: context flags 5264 * 5265 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 5266 * monitoring is configured with an rssi threshold, the driver will inform 5267 * whenever the rssi level reaches the threshold. 5268 */ 5269 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 5270 enum nl80211_cqm_rssi_threshold_event rssi_event, 5271 gfp_t gfp); 5272 5273 /** 5274 * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss 5275 * 5276 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5277 * @gfp: context flags 5278 */ 5279 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp); 5280 5281 /** 5282 * ieee80211_radar_detected - inform that a radar was detected 5283 * 5284 * @hw: pointer as obtained from ieee80211_alloc_hw() 5285 */ 5286 void ieee80211_radar_detected(struct ieee80211_hw *hw); 5287 5288 /** 5289 * ieee80211_chswitch_done - Complete channel switch process 5290 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5291 * @success: make the channel switch successful or not 5292 * 5293 * Complete the channel switch post-process: set the new operational channel 5294 * and wake up the suspended queues. 5295 */ 5296 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 5297 5298 /** 5299 * ieee80211_request_smps - request SM PS transition 5300 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5301 * @smps_mode: new SM PS mode 5302 * 5303 * This allows the driver to request an SM PS transition in managed 5304 * mode. This is useful when the driver has more information than 5305 * the stack about possible interference, for example by bluetooth. 5306 */ 5307 void ieee80211_request_smps(struct ieee80211_vif *vif, 5308 enum ieee80211_smps_mode smps_mode); 5309 5310 /** 5311 * ieee80211_ready_on_channel - notification of remain-on-channel start 5312 * @hw: pointer as obtained from ieee80211_alloc_hw() 5313 */ 5314 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 5315 5316 /** 5317 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 5318 * @hw: pointer as obtained from ieee80211_alloc_hw() 5319 */ 5320 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 5321 5322 /** 5323 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 5324 * 5325 * in order not to harm the system performance and user experience, the device 5326 * may request not to allow any rx ba session and tear down existing rx ba 5327 * sessions based on system constraints such as periodic BT activity that needs 5328 * to limit wlan activity (eg.sco or a2dp)." 5329 * in such cases, the intention is to limit the duration of the rx ppdu and 5330 * therefore prevent the peer device to use a-mpdu aggregation. 5331 * 5332 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5333 * @ba_rx_bitmap: Bit map of open rx ba per tid 5334 * @addr: & to bssid mac address 5335 */ 5336 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 5337 const u8 *addr); 5338 5339 /** 5340 * ieee80211_mark_rx_ba_filtered_frames - move RX BA window and mark filtered 5341 * @pubsta: station struct 5342 * @tid: the session's TID 5343 * @ssn: starting sequence number of the bitmap, all frames before this are 5344 * assumed to be out of the window after the call 5345 * @filtered: bitmap of filtered frames, BIT(0) is the @ssn entry etc. 5346 * @received_mpdus: number of received mpdus in firmware 5347 * 5348 * This function moves the BA window and releases all frames before @ssn, and 5349 * marks frames marked in the bitmap as having been filtered. Afterwards, it 5350 * checks if any frames in the window starting from @ssn can now be released 5351 * (in case they were only waiting for frames that were filtered.) 5352 */ 5353 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid, 5354 u16 ssn, u64 filtered, 5355 u16 received_mpdus); 5356 5357 /** 5358 * ieee80211_send_bar - send a BlockAckReq frame 5359 * 5360 * can be used to flush pending frames from the peer's aggregation reorder 5361 * buffer. 5362 * 5363 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5364 * @ra: the peer's destination address 5365 * @tid: the TID of the aggregation session 5366 * @ssn: the new starting sequence number for the receiver 5367 */ 5368 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 5369 5370 /** 5371 * ieee80211_start_rx_ba_session_offl - start a Rx BA session 5372 * 5373 * Some device drivers may offload part of the Rx aggregation flow including 5374 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5375 * reordering. 5376 * 5377 * Create structures responsible for reordering so device drivers may call here 5378 * when they complete AddBa negotiation. 5379 * 5380 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5381 * @addr: station mac address 5382 * @tid: the rx tid 5383 */ 5384 void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif, 5385 const u8 *addr, u16 tid); 5386 5387 /** 5388 * ieee80211_stop_rx_ba_session_offl - stop a Rx BA session 5389 * 5390 * Some device drivers may offload part of the Rx aggregation flow including 5391 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx 5392 * reordering. 5393 * 5394 * Destroy structures responsible for reordering so device drivers may call here 5395 * when they complete DelBa negotiation. 5396 * 5397 * @vif: &struct ieee80211_vif pointer from the add_interface callback 5398 * @addr: station mac address 5399 * @tid: the rx tid 5400 */ 5401 void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif, 5402 const u8 *addr, u16 tid); 5403 5404 /* Rate control API */ 5405 5406 /** 5407 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 5408 * 5409 * @hw: The hardware the algorithm is invoked for. 5410 * @sband: The band this frame is being transmitted on. 5411 * @bss_conf: the current BSS configuration 5412 * @skb: the skb that will be transmitted, the control information in it needs 5413 * to be filled in 5414 * @reported_rate: The rate control algorithm can fill this in to indicate 5415 * which rate should be reported to userspace as the current rate and 5416 * used for rate calculations in the mesh network. 5417 * @rts: whether RTS will be used for this frame because it is longer than the 5418 * RTS threshold 5419 * @short_preamble: whether mac80211 will request short-preamble transmission 5420 * if the selected rate supports it 5421 * @max_rate_idx: user-requested maximum (legacy) rate 5422 * (deprecated; this will be removed once drivers get updated to use 5423 * rate_idx_mask) 5424 * @rate_idx_mask: user-requested (legacy) rate mask 5425 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use) 5426 * @bss: whether this frame is sent out in AP or IBSS mode 5427 */ 5428 struct ieee80211_tx_rate_control { 5429 struct ieee80211_hw *hw; 5430 struct ieee80211_supported_band *sband; 5431 struct ieee80211_bss_conf *bss_conf; 5432 struct sk_buff *skb; 5433 struct ieee80211_tx_rate reported_rate; 5434 bool rts, short_preamble; 5435 u8 max_rate_idx; 5436 u32 rate_idx_mask; 5437 u8 *rate_idx_mcs_mask; 5438 bool bss; 5439 }; 5440 5441 struct rate_control_ops { 5442 const char *name; 5443 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 5444 void (*free)(void *priv); 5445 5446 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 5447 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 5448 struct cfg80211_chan_def *chandef, 5449 struct ieee80211_sta *sta, void *priv_sta); 5450 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 5451 struct cfg80211_chan_def *chandef, 5452 struct ieee80211_sta *sta, void *priv_sta, 5453 u32 changed); 5454 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 5455 void *priv_sta); 5456 5457 void (*tx_status_noskb)(void *priv, 5458 struct ieee80211_supported_band *sband, 5459 struct ieee80211_sta *sta, void *priv_sta, 5460 struct ieee80211_tx_info *info); 5461 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 5462 struct ieee80211_sta *sta, void *priv_sta, 5463 struct sk_buff *skb); 5464 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 5465 struct ieee80211_tx_rate_control *txrc); 5466 5467 void (*add_sta_debugfs)(void *priv, void *priv_sta, 5468 struct dentry *dir); 5469 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 5470 5471 u32 (*get_expected_throughput)(void *priv_sta); 5472 }; 5473 5474 static inline int rate_supported(struct ieee80211_sta *sta, 5475 enum nl80211_band band, 5476 int index) 5477 { 5478 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 5479 } 5480 5481 /** 5482 * rate_control_send_low - helper for drivers for management/no-ack frames 5483 * 5484 * Rate control algorithms that agree to use the lowest rate to 5485 * send management frames and NO_ACK data with the respective hw 5486 * retries should use this in the beginning of their mac80211 get_rate 5487 * callback. If true is returned the rate control can simply return. 5488 * If false is returned we guarantee that sta and sta and priv_sta is 5489 * not null. 5490 * 5491 * Rate control algorithms wishing to do more intelligent selection of 5492 * rate for multicast/broadcast frames may choose to not use this. 5493 * 5494 * @sta: &struct ieee80211_sta pointer to the target destination. Note 5495 * that this may be null. 5496 * @priv_sta: private rate control structure. This may be null. 5497 * @txrc: rate control information we sholud populate for mac80211. 5498 */ 5499 bool rate_control_send_low(struct ieee80211_sta *sta, 5500 void *priv_sta, 5501 struct ieee80211_tx_rate_control *txrc); 5502 5503 5504 static inline s8 5505 rate_lowest_index(struct ieee80211_supported_band *sband, 5506 struct ieee80211_sta *sta) 5507 { 5508 int i; 5509 5510 for (i = 0; i < sband->n_bitrates; i++) 5511 if (rate_supported(sta, sband->band, i)) 5512 return i; 5513 5514 /* warn when we cannot find a rate. */ 5515 WARN_ON_ONCE(1); 5516 5517 /* and return 0 (the lowest index) */ 5518 return 0; 5519 } 5520 5521 static inline 5522 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 5523 struct ieee80211_sta *sta) 5524 { 5525 unsigned int i; 5526 5527 for (i = 0; i < sband->n_bitrates; i++) 5528 if (rate_supported(sta, sband->band, i)) 5529 return true; 5530 return false; 5531 } 5532 5533 /** 5534 * rate_control_set_rates - pass the sta rate selection to mac80211/driver 5535 * 5536 * When not doing a rate control probe to test rates, rate control should pass 5537 * its rate selection to mac80211. If the driver supports receiving a station 5538 * rate table, it will use it to ensure that frames are always sent based on 5539 * the most recent rate control module decision. 5540 * 5541 * @hw: pointer as obtained from ieee80211_alloc_hw() 5542 * @pubsta: &struct ieee80211_sta pointer to the target destination. 5543 * @rates: new tx rate set to be used for this station. 5544 */ 5545 int rate_control_set_rates(struct ieee80211_hw *hw, 5546 struct ieee80211_sta *pubsta, 5547 struct ieee80211_sta_rates *rates); 5548 5549 int ieee80211_rate_control_register(const struct rate_control_ops *ops); 5550 void ieee80211_rate_control_unregister(const struct rate_control_ops *ops); 5551 5552 static inline bool 5553 conf_is_ht20(struct ieee80211_conf *conf) 5554 { 5555 return conf->chandef.width == NL80211_CHAN_WIDTH_20; 5556 } 5557 5558 static inline bool 5559 conf_is_ht40_minus(struct ieee80211_conf *conf) 5560 { 5561 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5562 conf->chandef.center_freq1 < conf->chandef.chan->center_freq; 5563 } 5564 5565 static inline bool 5566 conf_is_ht40_plus(struct ieee80211_conf *conf) 5567 { 5568 return conf->chandef.width == NL80211_CHAN_WIDTH_40 && 5569 conf->chandef.center_freq1 > conf->chandef.chan->center_freq; 5570 } 5571 5572 static inline bool 5573 conf_is_ht40(struct ieee80211_conf *conf) 5574 { 5575 return conf->chandef.width == NL80211_CHAN_WIDTH_40; 5576 } 5577 5578 static inline bool 5579 conf_is_ht(struct ieee80211_conf *conf) 5580 { 5581 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) && 5582 (conf->chandef.width != NL80211_CHAN_WIDTH_10) && 5583 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT); 5584 } 5585 5586 static inline enum nl80211_iftype 5587 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 5588 { 5589 if (p2p) { 5590 switch (type) { 5591 case NL80211_IFTYPE_STATION: 5592 return NL80211_IFTYPE_P2P_CLIENT; 5593 case NL80211_IFTYPE_AP: 5594 return NL80211_IFTYPE_P2P_GO; 5595 default: 5596 break; 5597 } 5598 } 5599 return type; 5600 } 5601 5602 static inline enum nl80211_iftype 5603 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 5604 { 5605 return ieee80211_iftype_p2p(vif->type, vif->p2p); 5606 } 5607 5608 /** 5609 * ieee80211_update_mu_groups - set the VHT MU-MIMO groud data 5610 * 5611 * @vif: the specified virtual interface 5612 * @membership: 64 bits array - a bit is set if station is member of the group 5613 * @position: 2 bits per group id indicating the position in the group 5614 * 5615 * Note: This function assumes that the given vif is valid and the position and 5616 * membership data is of the correct size and are in the same byte order as the 5617 * matching GroupId management frame. 5618 * Calls to this function need to be serialized with RX path. 5619 */ 5620 void ieee80211_update_mu_groups(struct ieee80211_vif *vif, 5621 const u8 *membership, const u8 *position); 5622 5623 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 5624 int rssi_min_thold, 5625 int rssi_max_thold); 5626 5627 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 5628 5629 /** 5630 * ieee80211_ave_rssi - report the average RSSI for the specified interface 5631 * 5632 * @vif: the specified virtual interface 5633 * 5634 * Note: This function assumes that the given vif is valid. 5635 * 5636 * Return: The average RSSI value for the requested interface, or 0 if not 5637 * applicable. 5638 */ 5639 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 5640 5641 /** 5642 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 5643 * @vif: virtual interface 5644 * @wakeup: wakeup reason(s) 5645 * @gfp: allocation flags 5646 * 5647 * See cfg80211_report_wowlan_wakeup(). 5648 */ 5649 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 5650 struct cfg80211_wowlan_wakeup *wakeup, 5651 gfp_t gfp); 5652 5653 /** 5654 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission 5655 * @hw: pointer as obtained from ieee80211_alloc_hw() 5656 * @vif: virtual interface 5657 * @skb: frame to be sent from within the driver 5658 * @band: the band to transmit on 5659 * @sta: optional pointer to get the station to send the frame to 5660 * 5661 * Note: must be called under RCU lock 5662 */ 5663 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw, 5664 struct ieee80211_vif *vif, struct sk_buff *skb, 5665 int band, struct ieee80211_sta **sta); 5666 5667 /** 5668 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state 5669 * 5670 * @next_tsf: TSF timestamp of the next absent state change 5671 * @has_next_tsf: next absent state change event pending 5672 * 5673 * @absent: descriptor bitmask, set if GO is currently absent 5674 * 5675 * private: 5676 * 5677 * @count: count fields from the NoA descriptors 5678 * @desc: adjusted data from the NoA 5679 */ 5680 struct ieee80211_noa_data { 5681 u32 next_tsf; 5682 bool has_next_tsf; 5683 5684 u8 absent; 5685 5686 u8 count[IEEE80211_P2P_NOA_DESC_MAX]; 5687 struct { 5688 u32 start; 5689 u32 duration; 5690 u32 interval; 5691 } desc[IEEE80211_P2P_NOA_DESC_MAX]; 5692 }; 5693 5694 /** 5695 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE 5696 * 5697 * @attr: P2P NoA IE 5698 * @data: NoA tracking data 5699 * @tsf: current TSF timestamp 5700 * 5701 * Return: number of successfully parsed descriptors 5702 */ 5703 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 5704 struct ieee80211_noa_data *data, u32 tsf); 5705 5706 /** 5707 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change 5708 * 5709 * @data: NoA tracking data 5710 * @tsf: current TSF timestamp 5711 */ 5712 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf); 5713 5714 /** 5715 * ieee80211_tdls_oper - request userspace to perform a TDLS operation 5716 * @vif: virtual interface 5717 * @peer: the peer's destination address 5718 * @oper: the requested TDLS operation 5719 * @reason_code: reason code for the operation, valid for TDLS teardown 5720 * @gfp: allocation flags 5721 * 5722 * See cfg80211_tdls_oper_request(). 5723 */ 5724 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, 5725 enum nl80211_tdls_operation oper, 5726 u16 reason_code, gfp_t gfp); 5727 5728 /** 5729 * ieee80211_reserve_tid - request to reserve a specific TID 5730 * 5731 * There is sometimes a need (such as in TDLS) for blocking the driver from 5732 * using a specific TID so that the FW can use it for certain operations such 5733 * as sending PTI requests. To make sure that the driver doesn't use that TID, 5734 * this function must be called as it flushes out packets on this TID and marks 5735 * it as blocked, so that any transmit for the station on this TID will be 5736 * redirected to the alternative TID in the same AC. 5737 * 5738 * Note that this function blocks and may call back into the driver, so it 5739 * should be called without driver locks held. Also note this function should 5740 * only be called from the driver's @sta_state callback. 5741 * 5742 * @sta: the station to reserve the TID for 5743 * @tid: the TID to reserve 5744 * 5745 * Returns: 0 on success, else on failure 5746 */ 5747 int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid); 5748 5749 /** 5750 * ieee80211_unreserve_tid - request to unreserve a specific TID 5751 * 5752 * Once there is no longer any need for reserving a certain TID, this function 5753 * should be called, and no longer will packets have their TID modified for 5754 * preventing use of this TID in the driver. 5755 * 5756 * Note that this function blocks and acquires a lock, so it should be called 5757 * without driver locks held. Also note this function should only be called 5758 * from the driver's @sta_state callback. 5759 * 5760 * @sta: the station 5761 * @tid: the TID to unreserve 5762 */ 5763 void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid); 5764 5765 /** 5766 * ieee80211_tx_dequeue - dequeue a packet from a software tx queue 5767 * 5768 * @hw: pointer as obtained from ieee80211_alloc_hw() 5769 * @txq: pointer obtained from station or virtual interface 5770 * 5771 * Returns the skb if successful, %NULL if no frame was available. 5772 */ 5773 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw, 5774 struct ieee80211_txq *txq); 5775 5776 /** 5777 * ieee80211_txq_get_depth - get pending frame/byte count of given txq 5778 * 5779 * The values are not guaranteed to be coherent with regard to each other, i.e. 5780 * txq state can change half-way of this function and the caller may end up 5781 * with "new" frame_cnt and "old" byte_cnt or vice-versa. 5782 * 5783 * @txq: pointer obtained from station or virtual interface 5784 * @frame_cnt: pointer to store frame count 5785 * @byte_cnt: pointer to store byte count 5786 */ 5787 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 5788 unsigned long *frame_cnt, 5789 unsigned long *byte_cnt); 5790 5791 /** 5792 * ieee80211_nan_func_terminated - notify about NAN function termination. 5793 * 5794 * This function is used to notify mac80211 about NAN function termination. 5795 * Note that this function can't be called from hard irq. 5796 * 5797 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5798 * @inst_id: the local instance id 5799 * @reason: termination reason (one of the NL80211_NAN_FUNC_TERM_REASON_*) 5800 * @gfp: allocation flags 5801 */ 5802 void ieee80211_nan_func_terminated(struct ieee80211_vif *vif, 5803 u8 inst_id, 5804 enum nl80211_nan_func_term_reason reason, 5805 gfp_t gfp); 5806 5807 /** 5808 * ieee80211_nan_func_match - notify about NAN function match event. 5809 * 5810 * This function is used to notify mac80211 about NAN function match. The 5811 * cookie inside the match struct will be assigned by mac80211. 5812 * Note that this function can't be called from hard irq. 5813 * 5814 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 5815 * @match: match event information 5816 * @gfp: allocation flags 5817 */ 5818 void ieee80211_nan_func_match(struct ieee80211_vif *vif, 5819 struct cfg80211_nan_match_params *match, 5820 gfp_t gfp); 5821 5822 #endif /* MAC80211_H */ 5823