1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * mac80211 <-> driver interface
5 * Copyright 2002-2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH
10 * Copyright (C) 2018 - 2019 Intel Corporation
16 #include <linux/bug.h>
17 #include <linux/kernel.h>
18 #include <linux/if_ether.h>
19 #include <linux/skbuff.h>
20 #include <linux/ieee80211.h>
21 #include <net/cfg80211.h>
22 #include <net/codel.h>
23 #include <net/ieee80211_radiotap.h>
24 #include <asm/unaligned.h>
29 * mac80211 is the Linux stack for 802.11 hardware that implements
30 * only partial functionality in hard- or firmware. This document
31 * defines the interface between mac80211 and low-level hardware
36 * DOC: Calling mac80211 from interrupts
38 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
39 * called in hardware interrupt context. The low-level driver must not call any
40 * other functions in hardware interrupt context. If there is a need for such
41 * call, the low-level driver should first ACK the interrupt and perform the
42 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
45 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also
46 * use the non-IRQ-safe functions!
52 * If you're reading this document and not the header file itself, it will
53 * be incomplete because not all documentation has been converted yet.
59 * As a general rule, when frames are passed between mac80211 and the driver,
60 * they start with the IEEE 802.11 header and include the same octets that are
61 * sent over the air except for the FCS which should be calculated by the
64 * There are, however, various exceptions to this rule for advanced features:
66 * The first exception is for hardware encryption and decryption offload
67 * where the IV/ICV may or may not be generated in hardware.
69 * Secondly, when the hardware handles fragmentation, the frame handed to
70 * the driver from mac80211 is the MSDU, not the MPDU.
74 * DOC: mac80211 workqueue
76 * mac80211 provides its own workqueue for drivers and internal mac80211 use.
77 * The workqueue is a single threaded workqueue and can only be accessed by
78 * helpers for sanity checking. Drivers must ensure all work added onto the
79 * mac80211 workqueue should be cancelled on the driver stop() callback.
81 * mac80211 will flushed the workqueue upon interface removal and during
84 * All work performed on the mac80211 workqueue must not acquire the RTNL lock.
89 * DOC: mac80211 software tx queueing
91 * mac80211 provides an optional intermediate queueing implementation designed
92 * to allow the driver to keep hardware queues short and provide some fairness
93 * between different stations/interfaces.
94 * In this model, the driver pulls data frames from the mac80211 queue instead
95 * of letting mac80211 push them via drv_tx().
96 * Other frames (e.g. control or management) are still pushed using drv_tx().
98 * Drivers indicate that they use this model by implementing the .wake_tx_queue
101 * Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with
102 * another per-sta for non-data/non-mgmt and bufferable management frames, and
103 * a single per-vif queue for multicast data frames.
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.
108 * The driver can't access the queue directly. To dequeue a frame from a
109 * txq, it calls ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a
110 * queue, it calls the .wake_tx_queue driver op.
112 * Drivers can optionally delegate responsibility for scheduling queues to
113 * mac80211, to take advantage of airtime fairness accounting. In this case, to
114 * obtain the next queue to pull frames from, the driver calls
115 * ieee80211_next_txq(). The driver is then expected to return the txq using
116 * ieee80211_return_txq().
118 * For AP powersave TIM handling, the driver only needs to indicate if it has
119 * buffered packets in the driver specific data structures by calling
120 * ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq
121 * struct, mac80211 sets the appropriate TIM PVB bits and calls
122 * .release_buffered_frames().
123 * In that callback the driver is therefore expected to release its own
124 * buffered frames and afterwards also frames from the ieee80211_txq (obtained
125 * via the usual ieee80211_tx_dequeue).
131 * enum ieee80211_max_queues - maximum number of queues
133 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
134 * @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set
136 enum ieee80211_max_queues {
137 IEEE80211_MAX_QUEUES = 16,
138 IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1,
141 #define IEEE80211_INVAL_HW_QUEUE 0xff
144 * enum ieee80211_ac_numbers - AC numbers as used in mac80211
145 * @IEEE80211_AC_VO: voice
146 * @IEEE80211_AC_VI: video
147 * @IEEE80211_AC_BE: best effort
148 * @IEEE80211_AC_BK: background
150 enum ieee80211_ac_numbers {
158 * struct ieee80211_tx_queue_params - transmit queue configuration
160 * The information provided in this structure is required for QoS
161 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
163 * @aifs: arbitration interframe space [0..255]
164 * @cw_min: minimum contention window [a value of the form
165 * 2^n-1 in the range 1..32767]
166 * @cw_max: maximum contention window [like @cw_min]
167 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
168 * @acm: is mandatory admission control required for the access category
169 * @uapsd: is U-APSD mode enabled for the queue
170 * @mu_edca: is the MU EDCA configured
171 * @mu_edca_param_rec: MU EDCA Parameter Record for HE
173 struct ieee80211_tx_queue_params {
181 struct ieee80211_he_mu_edca_param_ac_rec mu_edca_param_rec;
184 struct ieee80211_low_level_stats {
185 unsigned int dot11ACKFailureCount;
186 unsigned int dot11RTSFailureCount;
187 unsigned int dot11FCSErrorCount;
188 unsigned int dot11RTSSuccessCount;
192 * enum ieee80211_chanctx_change - change flag for channel context
193 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed
194 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed
195 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed
196 * @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel,
197 * this is used only with channel switching with CSA
198 * @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed
200 enum ieee80211_chanctx_change {
201 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0),
202 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1),
203 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2),
204 IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3),
205 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4),
209 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to
211 * This is the driver-visible part. The ieee80211_chanctx
212 * that contains it is visible in mac80211 only.
214 * @def: the channel definition
215 * @min_def: the minimum channel definition currently required.
216 * @rx_chains_static: The number of RX chains that must always be
217 * active on the channel to receive MIMO transmissions
218 * @rx_chains_dynamic: The number of RX chains that must be enabled
219 * after RTS/CTS handshake to receive SMPS MIMO transmissions;
220 * this will always be >= @rx_chains_static.
221 * @radar_enabled: whether radar detection is enabled on this channel.
222 * @drv_priv: data area for driver use, will always be aligned to
223 * sizeof(void *), size is determined in hw information.
225 struct ieee80211_chanctx_conf {
226 struct cfg80211_chan_def def;
227 struct cfg80211_chan_def min_def;
229 u8 rx_chains_static, rx_chains_dynamic;
233 u8 drv_priv[0] __aligned(sizeof(void *));
237 * enum ieee80211_chanctx_switch_mode - channel context switch mode
238 * @CHANCTX_SWMODE_REASSIGN_VIF: Both old and new contexts already
239 * exist (and will continue to exist), but the virtual interface
240 * needs to be switched from one to the other.
241 * @CHANCTX_SWMODE_SWAP_CONTEXTS: The old context exists but will stop
242 * to exist with this call, the new context doesn't exist but
243 * will be active after this call, the virtual interface switches
244 * from the old to the new (note that the driver may of course
245 * implement this as an on-the-fly chandef switch of the existing
246 * hardware context, but the mac80211 pointer for the old context
247 * will cease to exist and only the new one will later be used
248 * for changes/removal.)
250 enum ieee80211_chanctx_switch_mode {
251 CHANCTX_SWMODE_REASSIGN_VIF,
252 CHANCTX_SWMODE_SWAP_CONTEXTS,
256 * struct ieee80211_vif_chanctx_switch - vif chanctx switch information
258 * This is structure is used to pass information about a vif that
259 * needs to switch from one chanctx to another. The
260 * &ieee80211_chanctx_switch_mode defines how the switch should be
263 * @vif: the vif that should be switched from old_ctx to new_ctx
264 * @old_ctx: the old context to which the vif was assigned
265 * @new_ctx: the new context to which the vif must be assigned
267 struct ieee80211_vif_chanctx_switch {
268 struct ieee80211_vif *vif;
269 struct ieee80211_chanctx_conf *old_ctx;
270 struct ieee80211_chanctx_conf *new_ctx;
274 * enum ieee80211_bss_change - BSS change notification flags
276 * These flags are used with the bss_info_changed() callback
277 * to indicate which BSS parameter changed.
279 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
280 * also implies a change in the AID.
281 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
282 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed
283 * @BSS_CHANGED_ERP_SLOT: slot timing changed
284 * @BSS_CHANGED_HT: 802.11n parameters changed
285 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed
286 * @BSS_CHANGED_BEACON_INT: Beacon interval changed
287 * @BSS_CHANGED_BSSID: BSSID changed, for whatever
288 * reason (IBSS and managed mode)
289 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve
290 * new beacon (beaconing modes)
291 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
292 * enabled/disabled (beaconing modes)
293 * @BSS_CHANGED_CQM: Connection quality monitor config changed
294 * @BSS_CHANGED_IBSS: IBSS join status changed
295 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed.
296 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note
297 * that it is only ever disabled for station mode.
298 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface.
299 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode)
300 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode)
301 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode)
302 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
303 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS)
305 * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available:
306 * currently dtim_period only is under consideration.
307 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed,
308 * note that this is only called when it changes after the channel
309 * context had been assigned.
310 * @BSS_CHANGED_OCB: OCB join status changed
311 * @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed
312 * @BSS_CHANGED_KEEP_ALIVE: keep alive options (idle period or protected
313 * keep alive) changed.
314 * @BSS_CHANGED_MCAST_RATE: Multicast Rate setting changed for this interface
315 * @BSS_CHANGED_FTM_RESPONDER: fine timing measurement request responder
316 * functionality changed for this BSS (AP mode).
317 * @BSS_CHANGED_TWT: TWT status changed
318 * @BSS_CHANGED_HE_OBSS_PD: OBSS Packet Detection status changed.
321 enum ieee80211_bss_change {
322 BSS_CHANGED_ASSOC = 1<<0,
323 BSS_CHANGED_ERP_CTS_PROT = 1<<1,
324 BSS_CHANGED_ERP_PREAMBLE = 1<<2,
325 BSS_CHANGED_ERP_SLOT = 1<<3,
326 BSS_CHANGED_HT = 1<<4,
327 BSS_CHANGED_BASIC_RATES = 1<<5,
328 BSS_CHANGED_BEACON_INT = 1<<6,
329 BSS_CHANGED_BSSID = 1<<7,
330 BSS_CHANGED_BEACON = 1<<8,
331 BSS_CHANGED_BEACON_ENABLED = 1<<9,
332 BSS_CHANGED_CQM = 1<<10,
333 BSS_CHANGED_IBSS = 1<<11,
334 BSS_CHANGED_ARP_FILTER = 1<<12,
335 BSS_CHANGED_QOS = 1<<13,
336 BSS_CHANGED_IDLE = 1<<14,
337 BSS_CHANGED_SSID = 1<<15,
338 BSS_CHANGED_AP_PROBE_RESP = 1<<16,
339 BSS_CHANGED_PS = 1<<17,
340 BSS_CHANGED_TXPOWER = 1<<18,
341 BSS_CHANGED_P2P_PS = 1<<19,
342 BSS_CHANGED_BEACON_INFO = 1<<20,
343 BSS_CHANGED_BANDWIDTH = 1<<21,
344 BSS_CHANGED_OCB = 1<<22,
345 BSS_CHANGED_MU_GROUPS = 1<<23,
346 BSS_CHANGED_KEEP_ALIVE = 1<<24,
347 BSS_CHANGED_MCAST_RATE = 1<<25,
348 BSS_CHANGED_FTM_RESPONDER = 1<<26,
349 BSS_CHANGED_TWT = 1<<27,
350 BSS_CHANGED_HE_OBSS_PD = 1<<28,
352 /* when adding here, make sure to change ieee80211_reconfig */
356 * The maximum number of IPv4 addresses listed for ARP filtering. If the number
357 * of addresses for an interface increase beyond this value, hardware ARP
358 * filtering will be disabled.
360 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4
363 * enum ieee80211_event_type - event to be notified to the low level driver
364 * @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver.
365 * @MLME_EVENT: event related to MLME
366 * @BAR_RX_EVENT: a BAR was received
367 * @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because
368 * they timed out. This won't be called for each frame released, but only
369 * once each time the timeout triggers.
371 enum ieee80211_event_type {
379 * enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT
380 * @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver.
381 * @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver.
383 enum ieee80211_rssi_event_data {
389 * struct ieee80211_rssi_event - data attached to an %RSSI_EVENT
390 * @data: See &enum ieee80211_rssi_event_data
392 struct ieee80211_rssi_event {
393 enum ieee80211_rssi_event_data data;
397 * enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT
398 * @AUTH_EVENT: the MLME operation is authentication
399 * @ASSOC_EVENT: the MLME operation is association
400 * @DEAUTH_RX_EVENT: deauth received..
401 * @DEAUTH_TX_EVENT: deauth sent.
403 enum ieee80211_mlme_event_data {
411 * enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT
412 * @MLME_SUCCESS: the MLME operation completed successfully.
413 * @MLME_DENIED: the MLME operation was denied by the peer.
414 * @MLME_TIMEOUT: the MLME operation timed out.
416 enum ieee80211_mlme_event_status {
423 * struct ieee80211_mlme_event - data attached to an %MLME_EVENT
424 * @data: See &enum ieee80211_mlme_event_data
425 * @status: See &enum ieee80211_mlme_event_status
426 * @reason: the reason code if applicable
428 struct ieee80211_mlme_event {
429 enum ieee80211_mlme_event_data data;
430 enum ieee80211_mlme_event_status status;
435 * struct ieee80211_ba_event - data attached for BlockAck related events
436 * @sta: pointer to the &ieee80211_sta to which this event relates
438 * @ssn: the starting sequence number (for %BAR_RX_EVENT)
440 struct ieee80211_ba_event {
441 struct ieee80211_sta *sta;
447 * struct ieee80211_event - event to be sent to the driver
448 * @type: The event itself. See &enum ieee80211_event_type.
449 * @rssi: relevant if &type is %RSSI_EVENT
450 * @mlme: relevant if &type is %AUTH_EVENT
451 * @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT
452 * @u:union holding the fields above
454 struct ieee80211_event {
455 enum ieee80211_event_type type;
457 struct ieee80211_rssi_event rssi;
458 struct ieee80211_mlme_event mlme;
459 struct ieee80211_ba_event ba;
464 * struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data
466 * This structure describes the group id data of VHT MU-MIMO
468 * @membership: 64 bits array - a bit is set if station is member of the group
469 * @position: 2 bits per group id indicating the position in the group
471 struct ieee80211_mu_group_data {
472 u8 membership[WLAN_MEMBERSHIP_LEN];
473 u8 position[WLAN_USER_POSITION_LEN];
477 * struct ieee80211_ftm_responder_params - FTM responder parameters
479 * @lci: LCI subelement content
480 * @civicloc: CIVIC location subelement content
481 * @lci_len: LCI data length
482 * @civicloc_len: Civic data length
484 struct ieee80211_ftm_responder_params {
492 * struct ieee80211_bss_conf - holds the BSS's changing parameters
494 * This structure keeps information about a BSS (and an association
495 * to that BSS) that can change during the lifetime of the BSS.
497 * @bss_color: 6-bit value to mark inter-BSS frame, if BSS supports HE
498 * @htc_trig_based_pkt_ext: default PE in 4us units, if BSS supports HE
499 * @multi_sta_back_32bit: supports BA bitmap of 32-bits in Multi-STA BACK
500 * @uora_exists: is the UORA element advertised by AP
501 * @ack_enabled: indicates support to receive a multi-TID that solicits either
503 * @uora_ocw_range: UORA element's OCW Range field
504 * @frame_time_rts_th: HE duration RTS threshold, in units of 32us
505 * @he_support: does this BSS support HE
506 * @twt_requester: does this BSS support TWT requester (relevant for managed
507 * mode only, set if the AP advertises TWT responder role)
508 * @twt_responder: does this BSS support TWT requester (relevant for managed
509 * mode only, set if the AP advertises TWT responder role)
510 * @assoc: association status
511 * @ibss_joined: indicates whether this station is part of an IBSS
513 * @ibss_creator: indicates if a new IBSS network is being created
514 * @aid: association ID number, valid only when @assoc is true
515 * @use_cts_prot: use CTS protection
516 * @use_short_preamble: use 802.11b short preamble
517 * @use_short_slot: use short slot time (only relevant for ERP)
518 * @dtim_period: num of beacons before the next DTIM, for beaconing,
519 * valid in station mode only if after the driver was notified
520 * with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then.
521 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old
522 * as it may have been received during scanning long ago). If the
523 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can
524 * only come from a beacon, but might not become valid until after
525 * association when a beacon is received (which is notified with the
526 * %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice.
527 * @sync_device_ts: the device timestamp corresponding to the sync_tsf,
528 * the driver/device can use this to calculate synchronisation
529 * (see @sync_tsf). See also sync_dtim_count important notice.
530 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY
531 * is requested, see @sync_tsf/@sync_device_ts.
532 * IMPORTANT: These three sync_* parameters would possibly be out of sync
533 * by the time the driver will use them. The synchronized view is currently
534 * guaranteed only in certain callbacks.
535 * @beacon_int: beacon interval
536 * @assoc_capability: capabilities taken from assoc resp
537 * @basic_rates: bitmap of basic rates, each bit stands for an
538 * index into the rate table configured by the driver in
540 * @beacon_rate: associated AP's beacon TX rate
541 * @mcast_rate: per-band multicast rate index + 1 (0: disabled)
542 * @bssid: The BSSID for this BSS
543 * @enable_beacon: whether beaconing should be enabled or not
544 * @chandef: Channel definition for this BSS -- the hardware might be
545 * configured a higher bandwidth than this BSS uses, for example.
546 * @mu_group: VHT MU-MIMO group membership data
547 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation.
548 * This field is only valid when the channel is a wide HT/VHT channel.
549 * Note that with TDLS this can be the case (channel is HT, protection must
550 * be used from this field) even when the BSS association isn't using HT.
551 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value
552 * implies disabled. As with the cfg80211 callback, a change here should
553 * cause an event to be sent indicating where the current value is in
554 * relation to the newly configured threshold.
555 * @cqm_rssi_low: Connection quality monitor RSSI lower threshold, a zero value
556 * implies disabled. This is an alternative mechanism to the single
557 * threshold event and can't be enabled simultaneously with it.
558 * @cqm_rssi_high: Connection quality monitor RSSI upper threshold.
559 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis
560 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The
561 * may filter ARP queries targeted for other addresses than listed here.
562 * The driver must allow ARP queries targeted for all address listed here
563 * to pass through. An empty list implies no ARP queries need to pass.
564 * @arp_addr_cnt: Number of addresses currently on the list. Note that this
565 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list
566 * array size), it's up to the driver what to do in that case.
567 * @qos: This is a QoS-enabled BSS.
568 * @idle: This interface is idle. There's also a global idle flag in the
569 * hardware config which may be more appropriate depending on what
570 * your driver/device needs to do.
571 * @ps: power-save mode (STA only). This flag is NOT affected by
572 * offchannel/dynamic_ps operations.
573 * @ssid: The SSID of the current vif. Valid in AP and IBSS mode.
574 * @ssid_len: Length of SSID given in @ssid.
575 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
576 * @txpower: TX power in dBm
577 * @txpower_type: TX power adjustment used to control per packet Transmit
578 * Power Control (TPC) in lower driver for the current vif. In particular
579 * TPC is enabled if value passed in %txpower_type is
580 * NL80211_TX_POWER_LIMITED (allow using less than specified from
581 * userspace), whereas TPC is disabled if %txpower_type is set to
582 * NL80211_TX_POWER_FIXED (use value configured from userspace)
583 * @p2p_noa_attr: P2P NoA attribute for P2P powersave
584 * @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed
585 * to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS
586 * if it has associated clients without P2P PS support.
587 * @max_idle_period: the time period during which the station can refrain from
588 * transmitting frames to its associated AP without being disassociated.
589 * In units of 1000 TUs. Zero value indicates that the AP did not include
590 * a (valid) BSS Max Idle Period Element.
591 * @protected_keep_alive: if set, indicates that the station should send an RSN
592 * protected frame to the AP to reset the idle timer at the AP for the
594 * @ftm_responder: whether to enable or disable fine timing measurement FTM
595 * responder functionality.
596 * @ftmr_params: configurable lci/civic parameter when enabling FTM responder.
597 * @nontransmitted: this BSS is a nontransmitted BSS profile
598 * @transmitter_bssid: the address of transmitter AP
599 * @bssid_index: index inside the multiple BSSID set
600 * @bssid_indicator: 2^bssid_indicator is the maximum number of APs in set
601 * @ema_ap: AP supports enhancements of discovery and advertisement of
602 * nontransmitted BSSIDs
603 * @profile_periodicity: the least number of beacon frames need to be received
604 * in order to discover all the nontransmitted BSSIDs in the set.
605 * @he_operation: HE operation information of the AP we are connected to
606 * @he_obss_pd: OBSS Packet Detection parameters.
608 struct ieee80211_bss_conf {
611 u8 htc_trig_based_pkt_ext;
612 bool multi_sta_back_32bit;
616 u16 frame_time_rts_th;
620 /* association related data */
621 bool assoc, ibss_joined;
624 /* erp related data */
626 bool use_short_preamble;
631 u16 assoc_capability;
636 struct ieee80211_rate *beacon_rate;
637 int mcast_rate[NUM_NL80211_BANDS];
638 u16 ht_operation_mode;
643 struct cfg80211_chan_def chandef;
644 struct ieee80211_mu_group_data mu_group;
645 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN];
650 u8 ssid[IEEE80211_MAX_SSID_LEN];
654 enum nl80211_tx_power_setting txpower_type;
655 struct ieee80211_p2p_noa_attr p2p_noa_attr;
656 bool allow_p2p_go_ps;
658 bool protected_keep_alive;
660 struct ieee80211_ftm_responder_params *ftmr_params;
661 /* Multiple BSSID data */
663 u8 transmitter_bssid[ETH_ALEN];
667 u8 profile_periodicity;
668 struct ieee80211_he_operation he_operation;
669 struct ieee80211_he_obss_pd he_obss_pd;
673 * enum mac80211_tx_info_flags - flags to describe transmission information/status
675 * These flags are used with the @flags member of &ieee80211_tx_info.
677 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
678 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
679 * number to this frame, taking care of not overwriting the fragment
680 * number and increasing the sequence number only when the
681 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
682 * assign sequence numbers to QoS-data frames but cannot do so correctly
683 * for non-QoS-data and management frames because beacons need them from
684 * that counter as well and mac80211 cannot guarantee proper sequencing.
685 * If this flag is set, the driver should instruct the hardware to
686 * assign a sequence number to the frame or assign one itself. Cf. IEEE
687 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
688 * beacons and always be clear for frames without a sequence number field.
689 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
690 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
692 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
693 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
694 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
695 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211.
696 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
697 * because the destination STA was in powersave mode. Note that to
698 * avoid race conditions, the filter must be set by the hardware or
699 * firmware upon receiving a frame that indicates that the station
700 * went to sleep (must be done on device to filter frames already on
701 * the queue) and may only be unset after mac80211 gives the OK for
702 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above),
703 * since only then is it guaranteed that no more frames are in the
705 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged
706 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
707 * is for the whole aggregation.
708 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
709 * so consider using block ack request (BAR).
710 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
711 * set by rate control algorithms to indicate probe rate, will
712 * be cleared for fragmented frames (except on the last fragment)
713 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate
714 * that a frame can be transmitted while the queues are stopped for
715 * off-channel operation.
716 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211,
717 * used to indicate that a pending frame requires TX processing before
718 * it can be sent out.
719 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211,
720 * used to indicate that a frame was already retried due to PS
721 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211,
722 * used to indicate frame should not be encrypted
723 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll
724 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must
725 * be sent although the station is in powersave mode.
726 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the
727 * transmit function after the current frame, this can be used
728 * by drivers to kick the DMA queue only if unset or when the
730 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted
731 * after TX status because the destination was asleep, it must not
732 * be modified again (no seqno assignment, crypto, etc.)
733 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME
734 * code for connection establishment, this indicates that its status
735 * should kick the MLME state machine.
736 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211
737 * MLME command (internal to mac80211 to figure out whether to send TX
738 * status to user space)
739 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame
740 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this
741 * frame and selects the maximum number of streams that it can use.
742 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on
743 * the off-channel channel when a remain-on-channel offload is done
744 * in hardware -- normal packets still flow and are expected to be
745 * handled properly by the device.
746 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP
747 * testing. It will be sent out with incorrect Michael MIC key to allow
748 * TKIP countermeasures to be tested.
749 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate.
750 * This flag is actually used for management frame especially for P2P
751 * frames not being sent at CCK rate in 2GHz band.
752 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period,
753 * when its status is reported the service period ends. For frames in
754 * an SP that mac80211 transmits, it is already set; for driver frames
755 * the driver may set this flag. It is also used to do the same for
757 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate.
758 * This flag is used to send nullfunc frame at minimum rate when
759 * the nullfunc is used for connection monitoring purpose.
760 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it
761 * would be fragmented by size (this is optional, only used for
762 * monitor injection).
763 * @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with
764 * IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without
765 * any errors (like issues specific to the driver/HW).
766 * This flag must not be set for frames that don't request no-ack
767 * behaviour with IEEE80211_TX_CTL_NO_ACK.
769 * Note: If you have to add new flags to the enumeration, then don't
770 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary.
772 enum mac80211_tx_info_flags {
773 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
774 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1),
775 IEEE80211_TX_CTL_NO_ACK = BIT(2),
776 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3),
777 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4),
778 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5),
779 IEEE80211_TX_CTL_AMPDU = BIT(6),
780 IEEE80211_TX_CTL_INJECTED = BIT(7),
781 IEEE80211_TX_STAT_TX_FILTERED = BIT(8),
782 IEEE80211_TX_STAT_ACK = BIT(9),
783 IEEE80211_TX_STAT_AMPDU = BIT(10),
784 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11),
785 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12),
786 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13),
787 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14),
788 IEEE80211_TX_INTFL_RETRIED = BIT(15),
789 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16),
790 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17),
791 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18),
792 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19),
793 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20),
794 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21),
795 IEEE80211_TX_CTL_LDPC = BIT(22),
796 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24),
797 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25),
798 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26),
799 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27),
800 IEEE80211_TX_STATUS_EOSP = BIT(28),
801 IEEE80211_TX_CTL_USE_MINRATE = BIT(29),
802 IEEE80211_TX_CTL_DONTFRAG = BIT(30),
803 IEEE80211_TX_STAT_NOACK_TRANSMITTED = BIT(31),
806 #define IEEE80211_TX_CTL_STBC_SHIFT 23
809 * enum mac80211_tx_control_flags - flags to describe transmit control
811 * @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control
812 * protocol frame (e.g. EAP)
813 * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll
814 * frame (PS-Poll or uAPSD).
815 * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information
816 * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame
817 * @IEEE80211_TX_CTRL_FAST_XMIT: This frame is going through the fast_xmit path
818 * @IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP: This frame skips mesh path lookup
820 * These flags are used in tx_info->control.flags.
822 enum mac80211_tx_control_flags {
823 IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0),
824 IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1),
825 IEEE80211_TX_CTRL_RATE_INJECT = BIT(2),
826 IEEE80211_TX_CTRL_AMSDU = BIT(3),
827 IEEE80211_TX_CTRL_FAST_XMIT = BIT(4),
828 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP = BIT(5),
832 * This definition is used as a mask to clear all temporary flags, which are
833 * set by the tx handlers for each transmission attempt by the mac80211 stack.
835 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \
836 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \
837 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \
838 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \
839 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \
840 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \
841 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \
842 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP)
845 * enum mac80211_rate_control_flags - per-rate flags set by the
846 * Rate Control algorithm.
848 * These flags are set by the Rate control algorithm for each rate during tx,
849 * in the @flags member of struct ieee80211_tx_rate.
851 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
852 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
853 * This is set if the current BSS requires ERP protection.
854 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
855 * @IEEE80211_TX_RC_MCS: HT rate.
856 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split
857 * into a higher 4 bits (Nss) and lower 4 bits (MCS number)
858 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in
860 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz.
861 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission
862 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission
863 * (80+80 isn't supported yet)
864 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the
865 * adjacent 20 MHz channels, if the current channel type is
866 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
867 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate.
869 enum mac80211_rate_control_flags {
870 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0),
871 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1),
872 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
874 /* rate index is an HT/VHT MCS instead of an index */
875 IEEE80211_TX_RC_MCS = BIT(3),
876 IEEE80211_TX_RC_GREEN_FIELD = BIT(4),
877 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5),
878 IEEE80211_TX_RC_DUP_DATA = BIT(6),
879 IEEE80211_TX_RC_SHORT_GI = BIT(7),
880 IEEE80211_TX_RC_VHT_MCS = BIT(8),
881 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9),
882 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10),
886 /* there are 40 bytes if you don't need the rateset to be kept */
887 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40
889 /* if you do need the rateset, then you have less space */
890 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24
892 /* maximum number of rate stages */
893 #define IEEE80211_TX_MAX_RATES 4
895 /* maximum number of rate table entries */
896 #define IEEE80211_TX_RATE_TABLE_SIZE 4
899 * struct ieee80211_tx_rate - rate selection/status
901 * @idx: rate index to attempt to send with
902 * @flags: rate control flags (&enum mac80211_rate_control_flags)
903 * @count: number of tries in this rate before going to the next rate
905 * A value of -1 for @idx indicates an invalid rate and, if used
906 * in an array of retry rates, that no more rates should be tried.
908 * When used for transmit status reporting, the driver should
909 * always report the rate along with the flags it used.
911 * &struct ieee80211_tx_info contains an array of these structs
912 * in the control information, and it will be filled by the rate
913 * control algorithm according to what should be sent. For example,
914 * if this array contains, in the format { <idx>, <count> } the
917 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 }
919 * then this means that the frame should be transmitted
920 * up to twice at rate 3, up to twice at rate 2, and up to four
921 * times at rate 1 if it doesn't get acknowledged. Say it gets
922 * acknowledged by the peer after the fifth attempt, the status
923 * information should then contain::
925 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ...
927 * since it was transmitted twice at rate 3, twice at rate 2
928 * and once at rate 1 after which we received an acknowledgement.
930 struct ieee80211_tx_rate {
936 #define IEEE80211_MAX_TX_RETRY 31
938 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate,
942 WARN_ON((nss - 1) & ~0x7);
943 rate->idx = ((nss - 1) << 4) | mcs;
947 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate)
949 return rate->idx & 0xF;
953 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate)
955 return (rate->idx >> 4) + 1;
959 * struct ieee80211_tx_info - skb transmit information
961 * This structure is placed in skb->cb for three uses:
962 * (1) mac80211 TX control - mac80211 tells the driver what to do
963 * (2) driver internal use (if applicable)
964 * (3) TX status information - driver tells mac80211 what happened
966 * @flags: transmit info flags, defined above
967 * @band: the band to transmit on (use for checking for races)
968 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC
969 * @ack_frame_id: internal frame ID for TX status, used internally
970 * @tx_time_est: TX time estimate in units of 4us, used internally
971 * @control: union part for control data
972 * @control.rates: TX rates array to try
973 * @control.rts_cts_rate_idx: rate for RTS or CTS
974 * @control.use_rts: use RTS
975 * @control.use_cts_prot: use RTS/CTS
976 * @control.short_preamble: use short preamble (CCK only)
977 * @control.skip_table: skip externally configured rate table
978 * @control.jiffies: timestamp for expiry on powersave clients
979 * @control.vif: virtual interface (may be NULL)
980 * @control.hw_key: key to encrypt with (may be NULL)
981 * @control.flags: control flags, see &enum mac80211_tx_control_flags
982 * @control.enqueue_time: enqueue time (for iTXQs)
983 * @driver_rates: alias to @control.rates to reserve space
985 * @rate_driver_data: driver use area if driver needs @control.rates
986 * @status: union part for status data
987 * @status.rates: attempted rates
988 * @status.ack_signal: ACK signal
989 * @status.ampdu_ack_len: AMPDU ack length
990 * @status.ampdu_len: AMPDU length
991 * @status.antenna: (legacy, kept only for iwlegacy)
992 * @status.tx_time: airtime consumed for transmission
993 * @status.is_valid_ack_signal: ACK signal is valid
994 * @status.status_driver_data: driver use area
995 * @ack: union part for pure ACK data
996 * @ack.cookie: cookie for the ACK
997 * @driver_data: array of driver_data pointers
998 * @ampdu_ack_len: number of acked aggregated frames.
999 * relevant only if IEEE80211_TX_STAT_AMPDU was set.
1000 * @ampdu_len: number of aggregated frames.
1001 * relevant only if IEEE80211_TX_STAT_AMPDU was set.
1002 * @ack_signal: signal strength of the ACK frame
1004 struct ieee80211_tx_info {
1005 /* common information */
1018 struct ieee80211_tx_rate rates[
1019 IEEE80211_TX_MAX_RATES];
1020 s8 rts_cts_rate_idx;
1023 u8 short_preamble:1;
1027 /* only needed before rate control */
1028 unsigned long jiffies;
1030 /* NB: vif can be NULL for injected frames */
1031 struct ieee80211_vif *vif;
1032 struct ieee80211_key_conf *hw_key;
1034 codel_time_t enqueue_time;
1040 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES];
1046 bool is_valid_ack_signal;
1047 void *status_driver_data[19 / sizeof(void *)];
1050 struct ieee80211_tx_rate driver_rates[
1051 IEEE80211_TX_MAX_RATES];
1054 void *rate_driver_data[
1055 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)];
1058 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)];
1063 ieee80211_info_set_tx_time_est(struct ieee80211_tx_info *info, u16 tx_time_est)
1065 /* We only have 10 bits in tx_time_est, so store airtime
1066 * in increments of 4us and clamp the maximum to 2**12-1
1068 info->tx_time_est = min_t(u16, tx_time_est, 4095) >> 2;
1069 return info->tx_time_est << 2;
1073 ieee80211_info_get_tx_time_est(struct ieee80211_tx_info *info)
1075 return info->tx_time_est << 2;
1079 * struct ieee80211_tx_status - extended tx status info for rate control
1081 * @sta: Station that the packet was transmitted for
1082 * @info: Basic tx status information
1083 * @skb: Packet skb (can be NULL if not provided by the driver)
1084 * @rate: The TX rate that was used when sending the packet
1086 struct ieee80211_tx_status {
1087 struct ieee80211_sta *sta;
1088 struct ieee80211_tx_info *info;
1089 struct sk_buff *skb;
1090 struct rate_info *rate;
1094 * struct ieee80211_scan_ies - descriptors for different blocks of IEs
1096 * This structure is used to point to different blocks of IEs in HW scan
1097 * and scheduled scan. These blocks contain the IEs passed by userspace
1098 * and the ones generated by mac80211.
1100 * @ies: pointers to band specific IEs.
1101 * @len: lengths of band_specific IEs.
1102 * @common_ies: IEs for all bands (especially vendor specific ones)
1103 * @common_ie_len: length of the common_ies
1105 struct ieee80211_scan_ies {
1106 const u8 *ies[NUM_NL80211_BANDS];
1107 size_t len[NUM_NL80211_BANDS];
1108 const u8 *common_ies;
1109 size_t common_ie_len;
1113 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
1115 return (struct ieee80211_tx_info *)skb->cb;
1118 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb)
1120 return (struct ieee80211_rx_status *)skb->cb;
1124 * ieee80211_tx_info_clear_status - clear TX status
1126 * @info: The &struct ieee80211_tx_info to be cleared.
1128 * When the driver passes an skb back to mac80211, it must report
1129 * a number of things in TX status. This function clears everything
1130 * in the TX status but the rate control information (it does clear
1131 * the count since you need to fill that in anyway).
1133 * NOTE: You can only use this function if you do NOT use
1134 * info->driver_data! Use info->rate_driver_data
1135 * instead if you need only the less space that allows.
1138 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
1142 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
1143 offsetof(struct ieee80211_tx_info, control.rates));
1144 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
1145 offsetof(struct ieee80211_tx_info, driver_rates));
1146 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8);
1147 /* clear the rate counts */
1148 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++)
1149 info->status.rates[i].count = 0;
1152 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20);
1153 memset(&info->status.ampdu_ack_len, 0,
1154 sizeof(struct ieee80211_tx_info) -
1155 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
1160 * enum mac80211_rx_flags - receive flags
1162 * These flags are used with the @flag member of &struct ieee80211_rx_status.
1163 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
1164 * Use together with %RX_FLAG_MMIC_STRIPPED.
1165 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
1166 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
1167 * verification has been done by the hardware.
1168 * @RX_FLAG_IV_STRIPPED: The IV and ICV are stripped from this frame.
1169 * If this flag is set, the stack cannot do any replay detection
1170 * hence the driver or hardware will have to do that.
1171 * @RX_FLAG_PN_VALIDATED: Currently only valid for CCMP/GCMP frames, this
1172 * flag indicates that the PN was verified for replay protection.
1173 * Note that this flag is also currently only supported when a frame
1174 * is also decrypted (ie. @RX_FLAG_DECRYPTED must be set)
1175 * @RX_FLAG_DUP_VALIDATED: The driver should set this flag if it did
1176 * de-duplication by itself.
1177 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
1179 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
1181 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime
1182 * field) is valid and contains the time the first symbol of the MPDU
1183 * was received. This is useful in monitor mode and for proper IBSS
1185 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime
1186 * field) is valid and contains the time the last symbol of the MPDU
1187 * (including FCS) was received.
1188 * @RX_FLAG_MACTIME_PLCP_START: The timestamp passed in the RX status (@mactime
1189 * field) is valid and contains the time the SYNC preamble was received.
1190 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present.
1191 * Valid only for data frames (mainly A-MPDU)
1192 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference
1193 * number (@ampdu_reference) must be populated and be a distinct number for
1195 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all
1196 * subframes of a single A-MPDU
1197 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU
1198 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected
1200 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC
1201 * is stored in the @ampdu_delimiter_crc field)
1202 * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was
1203 * done by the hardware
1204 * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without
1205 * processing it in any regular way.
1206 * This is useful if drivers offload some frames but still want to report
1207 * them for sniffing purposes.
1208 * @RX_FLAG_SKIP_MONITOR: Process and report frame to all interfaces except
1209 * monitor interfaces.
1210 * This is useful if drivers offload some frames but still want to report
1211 * them for sniffing purposes.
1212 * @RX_FLAG_AMSDU_MORE: Some drivers may prefer to report separate A-MSDU
1213 * subframes instead of a one huge frame for performance reasons.
1214 * All, but the last MSDU from an A-MSDU should have this flag set. E.g.
1215 * if an A-MSDU has 3 frames, the first 2 must have the flag set, while
1216 * the 3rd (last) one must not have this flag set. The flag is used to
1217 * deal with retransmission/duplication recovery properly since A-MSDU
1218 * subframes share the same sequence number. Reported subframes can be
1219 * either regular MSDU or singly A-MSDUs. Subframes must not be
1220 * interleaved with other frames.
1221 * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific
1222 * radiotap data in the skb->data (before the frame) as described by
1223 * the &struct ieee80211_vendor_radiotap.
1224 * @RX_FLAG_ALLOW_SAME_PN: Allow the same PN as same packet before.
1225 * This is used for AMSDU subframes which can have the same PN as
1226 * the first subframe.
1227 * @RX_FLAG_ICV_STRIPPED: The ICV is stripped from this frame. CRC checking must
1228 * be done in the hardware.
1229 * @RX_FLAG_AMPDU_EOF_BIT: Value of the EOF bit in the A-MPDU delimiter for this
1231 * @RX_FLAG_AMPDU_EOF_BIT_KNOWN: The EOF value is known
1232 * @RX_FLAG_RADIOTAP_HE: HE radiotap data is present
1233 * (&struct ieee80211_radiotap_he, mac80211 will fill in
1239 * - DATA5_DATA_BW_RU_ALLOC
1243 * from the RX info data, so leave those zeroed when building this data)
1244 * @RX_FLAG_RADIOTAP_HE_MU: HE MU radiotap data is present
1245 * (&struct ieee80211_radiotap_he_mu)
1246 * @RX_FLAG_RADIOTAP_LSIG: L-SIG radiotap data is present
1247 * @RX_FLAG_NO_PSDU: use the frame only for radiotap reporting, with
1248 * the "0-length PSDU" field included there. The value for it is
1249 * in &struct ieee80211_rx_status. Note that if this value isn't
1250 * known the frame shouldn't be reported.
1252 enum mac80211_rx_flags {
1253 RX_FLAG_MMIC_ERROR = BIT(0),
1254 RX_FLAG_DECRYPTED = BIT(1),
1255 RX_FLAG_MACTIME_PLCP_START = BIT(2),
1256 RX_FLAG_MMIC_STRIPPED = BIT(3),
1257 RX_FLAG_IV_STRIPPED = BIT(4),
1258 RX_FLAG_FAILED_FCS_CRC = BIT(5),
1259 RX_FLAG_FAILED_PLCP_CRC = BIT(6),
1260 RX_FLAG_MACTIME_START = BIT(7),
1261 RX_FLAG_NO_SIGNAL_VAL = BIT(8),
1262 RX_FLAG_AMPDU_DETAILS = BIT(9),
1263 RX_FLAG_PN_VALIDATED = BIT(10),
1264 RX_FLAG_DUP_VALIDATED = BIT(11),
1265 RX_FLAG_AMPDU_LAST_KNOWN = BIT(12),
1266 RX_FLAG_AMPDU_IS_LAST = BIT(13),
1267 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(14),
1268 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(15),
1269 RX_FLAG_MACTIME_END = BIT(16),
1270 RX_FLAG_ONLY_MONITOR = BIT(17),
1271 RX_FLAG_SKIP_MONITOR = BIT(18),
1272 RX_FLAG_AMSDU_MORE = BIT(19),
1273 RX_FLAG_RADIOTAP_VENDOR_DATA = BIT(20),
1274 RX_FLAG_MIC_STRIPPED = BIT(21),
1275 RX_FLAG_ALLOW_SAME_PN = BIT(22),
1276 RX_FLAG_ICV_STRIPPED = BIT(23),
1277 RX_FLAG_AMPDU_EOF_BIT = BIT(24),
1278 RX_FLAG_AMPDU_EOF_BIT_KNOWN = BIT(25),
1279 RX_FLAG_RADIOTAP_HE = BIT(26),
1280 RX_FLAG_RADIOTAP_HE_MU = BIT(27),
1281 RX_FLAG_RADIOTAP_LSIG = BIT(28),
1282 RX_FLAG_NO_PSDU = BIT(29),
1286 * enum mac80211_rx_encoding_flags - MCS & bandwidth flags
1288 * @RX_ENC_FLAG_SHORTPRE: Short preamble was used for this frame
1289 * @RX_ENC_FLAG_SHORT_GI: Short guard interval was used
1290 * @RX_ENC_FLAG_HT_GF: This frame was received in a HT-greenfield transmission,
1291 * if the driver fills this value it should add
1292 * %IEEE80211_RADIOTAP_MCS_HAVE_FMT
1293 * to @hw.radiotap_mcs_details to advertise that fact.
1294 * @RX_ENC_FLAG_LDPC: LDPC was used
1295 * @RX_ENC_FLAG_STBC_MASK: STBC 2 bit bitmask. 1 - Nss=1, 2 - Nss=2, 3 - Nss=3
1296 * @RX_ENC_FLAG_BF: packet was beamformed
1298 enum mac80211_rx_encoding_flags {
1299 RX_ENC_FLAG_SHORTPRE = BIT(0),
1300 RX_ENC_FLAG_SHORT_GI = BIT(2),
1301 RX_ENC_FLAG_HT_GF = BIT(3),
1302 RX_ENC_FLAG_STBC_MASK = BIT(4) | BIT(5),
1303 RX_ENC_FLAG_LDPC = BIT(6),
1304 RX_ENC_FLAG_BF = BIT(7),
1307 #define RX_ENC_FLAG_STBC_SHIFT 4
1309 enum mac80211_rx_encoding {
1317 * struct ieee80211_rx_status - receive status
1319 * The low-level driver should provide this information (the subset
1320 * supported by hardware) to the 802.11 code with each received
1321 * frame, in the skb's control buffer (cb).
1323 * @mactime: value in microseconds of the 64-bit Time Synchronization Function
1324 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
1325 * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is
1326 * needed only for beacons and probe responses that update the scan cache.
1327 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use
1328 * it but can store it and pass it back to the driver for synchronisation
1329 * @band: the active band when this frame was received
1330 * @freq: frequency the radio was tuned to when receiving this frame, in MHz
1331 * This field must be set for management frames, but isn't strictly needed
1332 * for data (other) frames - for those it only affects radiotap reporting.
1333 * @signal: signal strength when receiving this frame, either in dBm, in dB or
1334 * unspecified depending on the hardware capabilities flags
1335 * @IEEE80211_HW_SIGNAL_*
1336 * @chains: bitmask of receive chains for which separate signal strength
1337 * values were filled.
1338 * @chain_signal: per-chain signal strength, in dBm (unlike @signal, doesn't
1339 * support dB or unspecified units)
1340 * @antenna: antenna used
1341 * @rate_idx: index of data rate into band's supported rates or MCS index if
1342 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT)
1343 * @nss: number of streams (VHT and HE only)
1344 * @flag: %RX_FLAG_\*
1345 * @encoding: &enum mac80211_rx_encoding
1346 * @bw: &enum rate_info_bw
1347 * @enc_flags: uses bits from &enum mac80211_rx_encoding_flags
1348 * @he_ru: HE RU, from &enum nl80211_he_ru_alloc
1349 * @he_gi: HE GI, from &enum nl80211_he_gi
1350 * @he_dcm: HE DCM value
1351 * @rx_flags: internal RX flags for mac80211
1352 * @ampdu_reference: A-MPDU reference number, must be a different value for
1353 * each A-MPDU but the same for each subframe within one A-MPDU
1354 * @ampdu_delimiter_crc: A-MPDU delimiter CRC
1355 * @zero_length_psdu_type: radiotap type of the 0-length PSDU
1357 struct ieee80211_rx_status {
1360 u32 device_timestamp;
1361 u32 ampdu_reference;
1365 u8 encoding:2, bw:3, he_ru:3;
1366 u8 he_gi:2, he_dcm:1;
1374 s8 chain_signal[IEEE80211_MAX_CHAINS];
1375 u8 ampdu_delimiter_crc;
1376 u8 zero_length_psdu_type;
1380 * struct ieee80211_vendor_radiotap - vendor radiotap data information
1381 * @present: presence bitmap for this vendor namespace
1382 * (this could be extended in the future if any vendor needs more
1383 * bits, the radiotap spec does allow for that)
1384 * @align: radiotap vendor namespace alignment. This defines the needed
1385 * alignment for the @data field below, not for the vendor namespace
1386 * description itself (which has a fixed 2-byte alignment)
1387 * Must be a power of two, and be set to at least 1!
1388 * @oui: radiotap vendor namespace OUI
1389 * @subns: radiotap vendor sub namespace
1390 * @len: radiotap vendor sub namespace skip length, if alignment is done
1391 * then that's added to this, i.e. this is only the length of the
1393 * @pad: number of bytes of padding after the @data, this exists so that
1394 * the skb data alignment can be preserved even if the data has odd
1396 * @data: the actual vendor namespace data
1398 * This struct, including the vendor data, goes into the skb->data before
1399 * the 802.11 header. It's split up in mac80211 using the align/oui/subns
1402 struct ieee80211_vendor_radiotap {
1413 * enum ieee80211_conf_flags - configuration flags
1415 * Flags to define PHY configuration options
1417 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this
1418 * to determine for example whether to calculate timestamps for packets
1419 * or not, do not use instead of filter flags!
1420 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only).
1421 * This is the power save mode defined by IEEE 802.11-2007 section 11.2,
1422 * meaning that the hardware still wakes up for beacons, is able to
1423 * transmit frames and receive the possible acknowledgment frames.
1424 * Not to be confused with hardware specific wakeup/sleep states,
1425 * driver is responsible for that. See the section "Powersave support"
1427 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set
1428 * the driver should be prepared to handle configuration requests but
1429 * may turn the device off as much as possible. Typically, this flag will
1430 * be set when an interface is set UP but not associated or scanning, but
1431 * it can also be unset in that case when monitor interfaces are active.
1432 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main
1433 * operating channel.
1435 enum ieee80211_conf_flags {
1436 IEEE80211_CONF_MONITOR = (1<<0),
1437 IEEE80211_CONF_PS = (1<<1),
1438 IEEE80211_CONF_IDLE = (1<<2),
1439 IEEE80211_CONF_OFFCHANNEL = (1<<3),
1444 * enum ieee80211_conf_changed - denotes which configuration changed
1446 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
1447 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed
1448 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed
1449 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed
1450 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed
1451 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
1452 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed
1453 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed
1454 * Note that this is only valid if channel contexts are not used,
1455 * otherwise each channel context has the number of chains listed.
1457 enum ieee80211_conf_changed {
1458 IEEE80211_CONF_CHANGE_SMPS = BIT(1),
1459 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2),
1460 IEEE80211_CONF_CHANGE_MONITOR = BIT(3),
1461 IEEE80211_CONF_CHANGE_PS = BIT(4),
1462 IEEE80211_CONF_CHANGE_POWER = BIT(5),
1463 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6),
1464 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7),
1465 IEEE80211_CONF_CHANGE_IDLE = BIT(8),
1469 * enum ieee80211_smps_mode - spatial multiplexing power save mode
1471 * @IEEE80211_SMPS_AUTOMATIC: automatic
1472 * @IEEE80211_SMPS_OFF: off
1473 * @IEEE80211_SMPS_STATIC: static
1474 * @IEEE80211_SMPS_DYNAMIC: dynamic
1475 * @IEEE80211_SMPS_NUM_MODES: internal, don't use
1477 enum ieee80211_smps_mode {
1478 IEEE80211_SMPS_AUTOMATIC,
1480 IEEE80211_SMPS_STATIC,
1481 IEEE80211_SMPS_DYNAMIC,
1484 IEEE80211_SMPS_NUM_MODES,
1488 * struct ieee80211_conf - configuration of the device
1490 * This struct indicates how the driver shall configure the hardware.
1492 * @flags: configuration flags defined above
1494 * @listen_interval: listen interval in units of beacon interval
1495 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use
1496 * in power saving. Power saving will not be enabled until a beacon
1497 * has been received and the DTIM period is known.
1498 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the
1499 * powersave documentation below. This variable is valid only when
1500 * the CONF_PS flag is set.
1502 * @power_level: requested transmit power (in dBm), backward compatibility
1503 * value only that is set to the minimum of all interfaces
1505 * @chandef: the channel definition to tune to
1506 * @radar_enabled: whether radar detection is enabled
1508 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
1509 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
1510 * but actually means the number of transmissions not the number of retries
1511 * @short_frame_max_tx_count: Maximum number of transmissions for a "short"
1512 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
1513 * number of transmissions not the number of retries
1515 * @smps_mode: spatial multiplexing powersave mode; note that
1516 * %IEEE80211_SMPS_STATIC is used when the device is not
1517 * configured for an HT channel.
1518 * Note that this is only valid if channel contexts are not used,
1519 * otherwise each channel context has the number of chains listed.
1521 struct ieee80211_conf {
1523 int power_level, dynamic_ps_timeout;
1525 u16 listen_interval;
1528 u8 long_frame_max_tx_count, short_frame_max_tx_count;
1530 struct cfg80211_chan_def chandef;
1532 enum ieee80211_smps_mode smps_mode;
1536 * struct ieee80211_channel_switch - holds the channel switch data
1538 * The information provided in this structure is required for channel switch
1541 * @timestamp: value in microseconds of the 64-bit Time Synchronization
1542 * Function (TSF) timer when the frame containing the channel switch
1543 * announcement was received. This is simply the rx.mactime parameter
1544 * the driver passed into mac80211.
1545 * @device_timestamp: arbitrary timestamp for the device, this is the
1546 * rx.device_timestamp parameter the driver passed to mac80211.
1547 * @block_tx: Indicates whether transmission must be blocked before the
1548 * scheduled channel switch, as indicated by the AP.
1549 * @chandef: the new channel to switch to
1550 * @count: the number of TBTT's until the channel switch event
1551 * @delay: maximum delay between the time the AP transmitted the last beacon in
1552 * current channel and the expected time of the first beacon in the new
1553 * channel, expressed in TU.
1555 struct ieee80211_channel_switch {
1557 u32 device_timestamp;
1559 struct cfg80211_chan_def chandef;
1565 * enum ieee80211_vif_flags - virtual interface flags
1567 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering
1568 * on this virtual interface to avoid unnecessary CPU wakeups
1569 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality
1570 * monitoring on this virtual interface -- i.e. it can monitor
1571 * connection quality related parameters, such as the RSSI level and
1572 * provide notifications if configured trigger levels are reached.
1573 * @IEEE80211_VIF_SUPPORTS_UAPSD: The device can do U-APSD for this
1574 * interface. This flag should be set during interface addition,
1575 * but may be set/cleared as late as authentication to an AP. It is
1576 * only valid for managed/station mode interfaces.
1577 * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes
1578 * and send P2P_PS notification to the driver if NOA changed, even
1579 * this is not pure P2P vif.
1581 enum ieee80211_vif_flags {
1582 IEEE80211_VIF_BEACON_FILTER = BIT(0),
1583 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1),
1584 IEEE80211_VIF_SUPPORTS_UAPSD = BIT(2),
1585 IEEE80211_VIF_GET_NOA_UPDATE = BIT(3),
1589 * struct ieee80211_vif - per-interface data
1591 * Data in this structure is continually present for driver
1592 * use during the life of a virtual interface.
1594 * @type: type of this virtual interface
1595 * @bss_conf: BSS configuration for this interface, either our own
1596 * or the BSS we're associated to
1597 * @addr: address of this interface
1598 * @p2p: indicates whether this AP or STA interface is a p2p
1599 * interface, i.e. a GO or p2p-sta respectively
1600 * @csa_active: marks whether a channel switch is going on. Internally it is
1601 * write-protected by sdata_lock and local->mtx so holding either is fine
1603 * @mu_mimo_owner: indicates interface owns MU-MIMO capability
1604 * @driver_flags: flags/capabilities the driver has for this interface,
1605 * these need to be set (or cleared) when the interface is added
1606 * or, if supported by the driver, the interface type is changed
1607 * at runtime, mac80211 will never touch this field
1608 * @hw_queue: hardware queue for each AC
1609 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only
1610 * @chanctx_conf: The channel context this interface is assigned to, or %NULL
1611 * when it is not assigned. This pointer is RCU-protected due to the TX
1612 * path needing to access it; even though the netdev carrier will always
1613 * be off when it is %NULL there can still be races and packets could be
1614 * processed after it switches back to %NULL.
1615 * @debugfs_dir: debugfs dentry, can be used by drivers to create own per
1616 * interface debug files. Note that it will be NULL for the virtual
1617 * monitor interface (if that is requested.)
1618 * @probe_req_reg: probe requests should be reported to mac80211 for this
1620 * @drv_priv: data area for driver use, will always be aligned to
1622 * @txq: the multicast data TX queue (if driver uses the TXQ abstraction)
1623 * @txqs_stopped: per AC flag to indicate that intermediate TXQs are stopped,
1624 * protected by fq->lock.
1626 struct ieee80211_vif {
1627 enum nl80211_iftype type;
1628 struct ieee80211_bss_conf bss_conf;
1629 u8 addr[ETH_ALEN] __aligned(2);
1635 u8 hw_queue[IEEE80211_NUM_ACS];
1637 struct ieee80211_txq *txq;
1639 struct ieee80211_chanctx_conf __rcu *chanctx_conf;
1643 #ifdef CONFIG_MAC80211_DEBUGFS
1644 struct dentry *debugfs_dir;
1647 unsigned int probe_req_reg;
1649 bool txqs_stopped[IEEE80211_NUM_ACS];
1652 u8 drv_priv[0] __aligned(sizeof(void *));
1655 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
1657 #ifdef CONFIG_MAC80211_MESH
1658 return vif->type == NL80211_IFTYPE_MESH_POINT;
1664 * wdev_to_ieee80211_vif - return a vif struct from a wdev
1665 * @wdev: the wdev to get the vif for
1667 * This can be used by mac80211 drivers with direct cfg80211 APIs
1668 * (like the vendor commands) that get a wdev.
1670 * Note that this function may return %NULL if the given wdev isn't
1671 * associated with a vif that the driver knows about (e.g. monitor
1672 * or AP_VLAN interfaces.)
1674 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
1677 * ieee80211_vif_to_wdev - return a wdev struct from a vif
1678 * @vif: the vif to get the wdev for
1680 * This can be used by mac80211 drivers with direct cfg80211 APIs
1681 * (like the vendor commands) that needs to get the wdev for a vif.
1683 * Note that this function may return %NULL if the given wdev isn't
1684 * associated with a vif that the driver knows about (e.g. monitor
1685 * or AP_VLAN interfaces.)
1687 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif);
1690 * enum ieee80211_key_flags - key flags
1692 * These flags are used for communication about keys between the driver
1693 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
1695 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
1696 * driver to indicate that it requires IV generation for this
1697 * particular key. Setting this flag does not necessarily mean that SKBs
1698 * will have sufficient tailroom for ICV or MIC.
1699 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
1700 * the driver for a TKIP key if it requires Michael MIC
1701 * generation in software.
1702 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
1703 * that the key is pairwise rather then a shared key.
1704 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a
1705 * CCMP/GCMP key if it requires CCMP/GCMP encryption of management frames
1706 * (MFP) to be done in software.
1707 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver
1708 * if space should be prepared for the IV, but the IV
1709 * itself should not be generated. Do not set together with
1710 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does
1711 * not necessarily mean that SKBs will have sufficient tailroom for ICV or
1713 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received
1714 * management frames. The flag can help drivers that have a hardware
1715 * crypto implementation that doesn't deal with management frames
1716 * properly by allowing them to not upload the keys to hardware and
1717 * fall back to software crypto. Note that this flag deals only with
1718 * RX, if your crypto engine can't deal with TX you can also set the
1719 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW.
1720 * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the
1721 * driver for a CCMP/GCMP key to indicate that is requires IV generation
1722 * only for management frames (MFP).
1723 * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the
1724 * driver for a key to indicate that sufficient tailroom must always
1725 * be reserved for ICV or MIC, even when HW encryption is enabled.
1726 * @IEEE80211_KEY_FLAG_PUT_MIC_SPACE: This flag should be set by the driver for
1727 * a TKIP key if it only requires MIC space. Do not set together with
1728 * @IEEE80211_KEY_FLAG_GENERATE_MMIC on the same key.
1729 * @IEEE80211_KEY_FLAG_NO_AUTO_TX: Key needs explicit Tx activation.
1730 * @IEEE80211_KEY_FLAG_GENERATE_MMIE: This flag should be set by the driver
1731 * for a AES_CMAC key to indicate that it requires sequence number
1734 enum ieee80211_key_flags {
1735 IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0),
1736 IEEE80211_KEY_FLAG_GENERATE_IV = BIT(1),
1737 IEEE80211_KEY_FLAG_GENERATE_MMIC = BIT(2),
1738 IEEE80211_KEY_FLAG_PAIRWISE = BIT(3),
1739 IEEE80211_KEY_FLAG_SW_MGMT_TX = BIT(4),
1740 IEEE80211_KEY_FLAG_PUT_IV_SPACE = BIT(5),
1741 IEEE80211_KEY_FLAG_RX_MGMT = BIT(6),
1742 IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7),
1743 IEEE80211_KEY_FLAG_PUT_MIC_SPACE = BIT(8),
1744 IEEE80211_KEY_FLAG_NO_AUTO_TX = BIT(9),
1745 IEEE80211_KEY_FLAG_GENERATE_MMIE = BIT(10),
1749 * struct ieee80211_key_conf - key information
1751 * This key information is given by mac80211 to the driver by
1752 * the set_key() callback in &struct ieee80211_ops.
1754 * @hw_key_idx: To be set by the driver, this is the key index the driver
1755 * wants to be given when a frame is transmitted and needs to be
1756 * encrypted in hardware.
1757 * @cipher: The key's cipher suite selector.
1758 * @tx_pn: PN used for TX keys, may be used by the driver as well if it
1759 * needs to do software PN assignment by itself (e.g. due to TSO)
1760 * @flags: key flags, see &enum ieee80211_key_flags.
1761 * @keyidx: the key index (0-3)
1762 * @keylen: key material length
1763 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte)
1765 * - Temporal Encryption Key (128 bits)
1766 * - Temporal Authenticator Tx MIC Key (64 bits)
1767 * - Temporal Authenticator Rx MIC Key (64 bits)
1768 * @icv_len: The ICV length for this key type
1769 * @iv_len: The IV length for this key type
1771 struct ieee80211_key_conf {
1783 #define IEEE80211_MAX_PN_LEN 16
1785 #define TKIP_PN_TO_IV16(pn) ((u16)(pn & 0xffff))
1786 #define TKIP_PN_TO_IV32(pn) ((u32)((pn >> 16) & 0xffffffff))
1789 * struct ieee80211_key_seq - key sequence counter
1791 * @tkip: TKIP data, containing IV32 and IV16 in host byte order
1792 * @ccmp: PN data, most significant byte first (big endian,
1793 * reverse order than in packet)
1794 * @aes_cmac: PN data, most significant byte first (big endian,
1795 * reverse order than in packet)
1796 * @aes_gmac: PN data, most significant byte first (big endian,
1797 * reverse order than in packet)
1798 * @gcmp: PN data, most significant byte first (big endian,
1799 * reverse order than in packet)
1800 * @hw: data for HW-only (e.g. cipher scheme) keys
1802 struct ieee80211_key_seq {
1821 u8 seq[IEEE80211_MAX_PN_LEN];
1828 * struct ieee80211_cipher_scheme - cipher scheme
1830 * This structure contains a cipher scheme information defining
1831 * the secure packet crypto handling.
1833 * @cipher: a cipher suite selector
1834 * @iftype: a cipher iftype bit mask indicating an allowed cipher usage
1835 * @hdr_len: a length of a security header used the cipher
1836 * @pn_len: a length of a packet number in the security header
1837 * @pn_off: an offset of pn from the beginning of the security header
1838 * @key_idx_off: an offset of key index byte in the security header
1839 * @key_idx_mask: a bit mask of key_idx bits
1840 * @key_idx_shift: a bit shift needed to get key_idx
1841 * key_idx value calculation:
1842 * (sec_header_base[key_idx_off] & key_idx_mask) >> key_idx_shift
1843 * @mic_len: a mic length in bytes
1845 struct ieee80211_cipher_scheme {
1858 * enum set_key_cmd - key command
1860 * Used with the set_key() callback in &struct ieee80211_ops, this
1861 * indicates whether a key is being removed or added.
1863 * @SET_KEY: a key is set
1864 * @DISABLE_KEY: a key must be disabled
1867 SET_KEY, DISABLE_KEY,
1871 * enum ieee80211_sta_state - station state
1873 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all,
1874 * this is a special state for add/remove transitions
1875 * @IEEE80211_STA_NONE: station exists without special state
1876 * @IEEE80211_STA_AUTH: station is authenticated
1877 * @IEEE80211_STA_ASSOC: station is associated
1878 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X)
1880 enum ieee80211_sta_state {
1881 /* NOTE: These need to be ordered correctly! */
1882 IEEE80211_STA_NOTEXIST,
1885 IEEE80211_STA_ASSOC,
1886 IEEE80211_STA_AUTHORIZED,
1890 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth
1891 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz
1892 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz
1893 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz
1894 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz
1895 * (including 80+80 MHz)
1897 * Implementation note: 20 must be zero to be initialized
1898 * correctly, the values must be sorted.
1900 enum ieee80211_sta_rx_bandwidth {
1901 IEEE80211_STA_RX_BW_20 = 0,
1902 IEEE80211_STA_RX_BW_40,
1903 IEEE80211_STA_RX_BW_80,
1904 IEEE80211_STA_RX_BW_160,
1908 * struct ieee80211_sta_rates - station rate selection table
1910 * @rcu_head: RCU head used for freeing the table on update
1911 * @rate: transmit rates/flags to be used by default.
1912 * Overriding entries per-packet is possible by using cb tx control.
1914 struct ieee80211_sta_rates {
1915 struct rcu_head rcu_head;
1922 } rate[IEEE80211_TX_RATE_TABLE_SIZE];
1926 * struct ieee80211_sta_txpwr - station txpower configuration
1928 * Used to configure txpower for station.
1930 * @power: indicates the tx power, in dBm, to be used when sending data frames
1932 * @type: In particular if TPC %type is NL80211_TX_POWER_LIMITED then tx power
1933 * will be less than or equal to specified from userspace, whereas if TPC
1934 * %type is NL80211_TX_POWER_AUTOMATIC then it indicates default tx power.
1935 * NL80211_TX_POWER_FIXED is not a valid configuration option for
1938 struct ieee80211_sta_txpwr {
1940 enum nl80211_tx_power_setting type;
1944 * struct ieee80211_sta - station table entry
1946 * A station table entry represents a station we are possibly
1947 * communicating with. Since stations are RCU-managed in
1948 * mac80211, any ieee80211_sta pointer you get access to must
1949 * either be protected by rcu_read_lock() explicitly or implicitly,
1950 * or you must take good care to not use such a pointer after a
1951 * call to your sta_remove callback that removed it.
1953 * @addr: MAC address
1954 * @aid: AID we assigned to the station if we're an AP
1955 * @supp_rates: Bitmap of supported rates (per band)
1956 * @ht_cap: HT capabilities of this STA; restricted to our own capabilities
1957 * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities
1958 * @he_cap: HE capabilities of this STA
1959 * @max_rx_aggregation_subframes: maximal amount of frames in a single AMPDU
1960 * that this station is allowed to transmit to us.
1961 * Can be modified by driver.
1962 * @wme: indicates whether the STA supports QoS/WME (if local devices does,
1963 * otherwise always false)
1964 * @drv_priv: data area for driver use, will always be aligned to
1965 * sizeof(void \*), size is determined in hw information.
1966 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid
1967 * if wme is supported. The bits order is like in
1968 * IEEE80211_WMM_IE_STA_QOSINFO_AC_*.
1969 * @max_sp: max Service Period. Only valid if wme is supported.
1970 * @bandwidth: current bandwidth the station can receive with
1971 * @rx_nss: in HT/VHT, the maximum number of spatial streams the
1972 * station can receive at the moment, changed by operating mode
1973 * notifications and capabilities. The value is only valid after
1974 * the station moves to associated state.
1975 * @smps_mode: current SMPS mode (off, static or dynamic)
1976 * @rates: rate control selection table
1977 * @tdls: indicates whether the STA is a TDLS peer
1978 * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only
1979 * valid if the STA is a TDLS peer in the first place.
1980 * @mfp: indicates whether the STA uses management frame protection or not.
1981 * @max_amsdu_subframes: indicates the maximal number of MSDUs in a single
1982 * A-MSDU. Taken from the Extended Capabilities element. 0 means
1984 * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not.
1985 * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control.
1986 * @max_tid_amsdu_len: Maximum A-MSDU size in bytes for this TID
1987 * @txq: per-TID data TX queues (if driver uses the TXQ abstraction); note that
1988 * the last entry (%IEEE80211_NUM_TIDS) is used for non-data frames
1990 struct ieee80211_sta {
1991 u32 supp_rates[NUM_NL80211_BANDS];
1994 struct ieee80211_sta_ht_cap ht_cap;
1995 struct ieee80211_sta_vht_cap vht_cap;
1996 struct ieee80211_sta_he_cap he_cap;
1997 u16 max_rx_aggregation_subframes;
2002 enum ieee80211_sta_rx_bandwidth bandwidth;
2003 enum ieee80211_smps_mode smps_mode;
2004 struct ieee80211_sta_rates __rcu *rates;
2006 bool tdls_initiator;
2008 u8 max_amsdu_subframes;
2012 * indicates the maximal length of an A-MSDU in bytes.
2013 * This field is always valid for packets with a VHT preamble.
2014 * For packets with a HT preamble, additional limits apply:
2016 * * If the skb is transmitted as part of a BA agreement, the
2017 * A-MSDU maximal size is min(max_amsdu_len, 4065) bytes.
2018 * * If the skb is not part of a BA agreement, the A-MSDU maximal
2019 * size is min(max_amsdu_len, 7935) bytes.
2021 * Both additional HT limits must be enforced by the low level
2022 * driver. This is defined by the spec (IEEE 802.11-2012 section
2026 bool support_p2p_ps;
2027 u16 max_rc_amsdu_len;
2028 u16 max_tid_amsdu_len[IEEE80211_NUM_TIDS];
2029 struct ieee80211_sta_txpwr txpwr;
2031 struct ieee80211_txq *txq[IEEE80211_NUM_TIDS + 1];
2034 u8 drv_priv[0] __aligned(sizeof(void *));
2038 * enum sta_notify_cmd - sta notify command
2040 * Used with the sta_notify() callback in &struct ieee80211_ops, this
2041 * indicates if an associated station made a power state transition.
2043 * @STA_NOTIFY_SLEEP: a station is now sleeping
2044 * @STA_NOTIFY_AWAKE: a sleeping station woke up
2046 enum sta_notify_cmd {
2047 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE,
2051 * struct ieee80211_tx_control - TX control data
2053 * @sta: station table entry, this sta pointer may be NULL and
2054 * it is not allowed to copy the pointer, due to RCU.
2056 struct ieee80211_tx_control {
2057 struct ieee80211_sta *sta;
2061 * struct ieee80211_txq - Software intermediate tx queue
2063 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
2064 * @sta: station table entry, %NULL for per-vif queue
2065 * @tid: the TID for this queue (unused for per-vif queue),
2066 * %IEEE80211_NUM_TIDS for non-data (if enabled)
2067 * @ac: the AC for this queue
2068 * @drv_priv: driver private area, sized by hw->txq_data_size
2070 * The driver can obtain packets from this queue by calling
2071 * ieee80211_tx_dequeue().
2073 struct ieee80211_txq {
2074 struct ieee80211_vif *vif;
2075 struct ieee80211_sta *sta;
2080 u8 drv_priv[0] __aligned(sizeof(void *));
2084 * enum ieee80211_hw_flags - hardware flags
2086 * These flags are used to indicate hardware capabilities to
2087 * the stack. Generally, flags here should have their meaning
2088 * done in a way that the simplest hardware doesn't need setting
2089 * any particular flags. There are some exceptions to this rule,
2090 * however, so you are advised to review these flags carefully.
2092 * @IEEE80211_HW_HAS_RATE_CONTROL:
2093 * The hardware or firmware includes rate control, and cannot be
2094 * controlled by the stack. As such, no rate control algorithm
2095 * should be instantiated, and the TX rate reported to userspace
2096 * will be taken from the TX status instead of the rate control
2098 * Note that this requires that the driver implement a number of
2099 * callbacks so it has the correct information, it needs to have
2100 * the @set_rts_threshold callback and must look at the BSS config
2101 * @use_cts_prot for G/N protection, @use_short_slot for slot
2102 * timing in 2.4 GHz and @use_short_preamble for preambles for
2105 * @IEEE80211_HW_RX_INCLUDES_FCS:
2106 * Indicates that received frames passed to the stack include
2107 * the FCS at the end.
2109 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
2110 * Some wireless LAN chipsets buffer broadcast/multicast frames
2111 * for power saving stations in the hardware/firmware and others
2112 * rely on the host system for such buffering. This option is used
2113 * to configure the IEEE 802.11 upper layer to buffer broadcast and
2114 * multicast frames when there are power saving stations so that
2115 * the driver can fetch them with ieee80211_get_buffered_bc().
2117 * @IEEE80211_HW_SIGNAL_UNSPEC:
2118 * Hardware can provide signal values but we don't know its units. We
2119 * expect values between 0 and @max_signal.
2120 * If possible please provide dB or dBm instead.
2122 * @IEEE80211_HW_SIGNAL_DBM:
2123 * Hardware gives signal values in dBm, decibel difference from
2124 * one milliwatt. This is the preferred method since it is standardized
2125 * between different devices. @max_signal does not need to be set.
2127 * @IEEE80211_HW_SPECTRUM_MGMT:
2128 * Hardware supports spectrum management defined in 802.11h
2129 * Measurement, Channel Switch, Quieting, TPC
2131 * @IEEE80211_HW_AMPDU_AGGREGATION:
2132 * Hardware supports 11n A-MPDU aggregation.
2134 * @IEEE80211_HW_SUPPORTS_PS:
2135 * Hardware has power save support (i.e. can go to sleep).
2137 * @IEEE80211_HW_PS_NULLFUNC_STACK:
2138 * Hardware requires nullfunc frame handling in stack, implies
2139 * stack support for dynamic PS.
2141 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS:
2142 * Hardware has support for dynamic PS.
2144 * @IEEE80211_HW_MFP_CAPABLE:
2145 * Hardware supports management frame protection (MFP, IEEE 802.11w).
2147 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS:
2148 * Hardware can provide ack status reports of Tx frames to
2151 * @IEEE80211_HW_CONNECTION_MONITOR:
2152 * The hardware performs its own connection monitoring, including
2153 * periodic keep-alives to the AP and probing the AP on beacon loss.
2155 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC:
2156 * This device needs to get data from beacon before association (i.e.
2159 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports
2160 * per-station GTKs as used by IBSS RSN or during fast transition. If
2161 * the device doesn't support per-station GTKs, but can be asked not
2162 * to decrypt group addressed frames, then IBSS RSN support is still
2163 * possible but software crypto will be used. Advertise the wiphy flag
2164 * only in that case.
2166 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device
2167 * autonomously manages the PS status of connected stations. When
2168 * this flag is set mac80211 will not trigger PS mode for connected
2169 * stations based on the PM bit of incoming frames.
2170 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure
2171 * the PS mode of connected stations.
2173 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session
2174 * setup strictly in HW. mac80211 should not attempt to do this in
2177 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of
2178 * a virtual monitor interface when monitor interfaces are the only
2179 * active interfaces.
2181 * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to
2182 * be created. It is expected user-space will create vifs as
2183 * desired (and thus have them named as desired).
2185 * @IEEE80211_HW_SW_CRYPTO_CONTROL: The driver wants to control which of the
2186 * crypto algorithms can be done in software - so don't automatically
2187 * try to fall back to it if hardware crypto fails, but do so only if
2188 * the driver returns 1. This also forces the driver to advertise its
2189 * supported cipher suites.
2191 * @IEEE80211_HW_SUPPORT_FAST_XMIT: The driver/hardware supports fast-xmit,
2192 * this currently requires only the ability to calculate the duration
2195 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface
2196 * queue mapping in order to use different queues (not just one per AC)
2197 * for different virtual interfaces. See the doc section on HW queue
2198 * control for more details.
2200 * @IEEE80211_HW_SUPPORTS_RC_TABLE: The driver supports using a rate
2201 * selection table provided by the rate control algorithm.
2203 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any
2204 * P2P Interface. This will be honoured even if more than one interface
2207 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames
2208 * only, to allow getting TBTT of a DTIM beacon.
2210 * @IEEE80211_HW_SUPPORTS_HT_CCK_RATES: Hardware supports mixing HT/CCK rates
2211 * and can cope with CCK rates in an aggregation session (e.g. by not
2212 * using aggregation for such frames.)
2214 * @IEEE80211_HW_CHANCTX_STA_CSA: Support 802.11h based channel-switch (CSA)
2215 * for a single active channel while using channel contexts. When support
2216 * is not enabled the default action is to disconnect when getting the
2219 * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload
2220 * or tailroom of TX skbs without copying them first.
2222 * @IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands
2223 * in one command, mac80211 doesn't have to run separate scans per band.
2225 * @IEEE80211_HW_TDLS_WIDER_BW: The device/driver supports wider bandwidth
2226 * than then BSS bandwidth for a TDLS link on the base channel.
2228 * @IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU: The driver supports receiving A-MSDUs
2231 * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status
2234 * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each
2235 * station has a unique address, i.e. each station entry can be identified
2236 * by just its MAC address; this prevents, for example, the same station
2237 * from connecting to two virtual AP interfaces at the same time.
2239 * @IEEE80211_HW_SUPPORTS_REORDERING_BUFFER: Hardware (or driver) manages the
2240 * reordering buffer internally, guaranteeing mac80211 receives frames in
2241 * order and does not need to manage its own reorder buffer or BA session
2244 * @IEEE80211_HW_USES_RSS: The device uses RSS and thus requires parallel RX,
2245 * which implies using per-CPU station statistics.
2247 * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated
2248 * A-MSDU frames. Requires software tx queueing and fast-xmit support.
2249 * When not using minstrel/minstrel_ht rate control, the driver must
2250 * limit the maximum A-MSDU size based on the current tx rate by setting
2251 * max_rc_amsdu_len in struct ieee80211_sta.
2253 * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list
2254 * skbs, needed for zero-copy software A-MSDU.
2256 * @IEEE80211_HW_REPORTS_LOW_ACK: The driver (or firmware) reports low ack event
2257 * by ieee80211_report_low_ack() based on its own algorithm. For such
2258 * drivers, mac80211 packet loss mechanism will not be triggered and driver
2259 * is completely depending on firmware event for station kickout.
2261 * @IEEE80211_HW_SUPPORTS_TX_FRAG: Hardware does fragmentation by itself.
2262 * The stack will not do fragmentation.
2263 * The callback for @set_frag_threshold should be set as well.
2265 * @IEEE80211_HW_SUPPORTS_TDLS_BUFFER_STA: Hardware supports buffer STA on
2268 * @IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP: The driver requires the
2269 * mgd_prepare_tx() callback to be called before transmission of a
2270 * deauthentication frame in case the association was completed but no
2271 * beacon was heard. This is required in multi-channel scenarios, where the
2272 * virtual interface might not be given air time for the transmission of
2273 * the frame, as it is not synced with the AP/P2P GO yet, and thus the
2274 * deauthentication frame might not be transmitted.
2276 * @IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP: The driver (or firmware) doesn't
2277 * support QoS NDP for AP probing - that's most likely a driver bug.
2279 * @IEEE80211_HW_BUFF_MMPDU_TXQ: use the TXQ for bufferable MMPDUs, this of
2280 * course requires the driver to use TXQs to start with.
2282 * @IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW: (Hardware) rate control supports VHT
2283 * extended NSS BW (dot11VHTExtendedNSSBWCapable). This flag will be set if
2284 * the selected rate control algorithm sets %RATE_CTRL_CAPA_VHT_EXT_NSS_BW
2285 * but if the rate control is built-in then it must be set by the driver.
2286 * See also the documentation for that flag.
2288 * @IEEE80211_HW_STA_MMPDU_TXQ: use the extra non-TID per-station TXQ for all
2289 * MMPDUs on station interfaces. This of course requires the driver to use
2290 * TXQs to start with.
2292 * @IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN: Driver does not report accurate A-MPDU
2293 * length in tx status information
2295 * @IEEE80211_HW_SUPPORTS_MULTI_BSSID: Hardware supports multi BSSID
2297 * @IEEE80211_HW_SUPPORTS_ONLY_HE_MULTI_BSSID: Hardware supports multi BSSID
2298 * only for HE APs. Applies if @IEEE80211_HW_SUPPORTS_MULTI_BSSID is set.
2300 * @IEEE80211_HW_AMPDU_KEYBORDER_SUPPORT: The card and driver is only
2301 * aggregating MPDUs with the same keyid, allowing mac80211 to keep Tx
2302 * A-MPDU sessions active while rekeying with Extended Key ID.
2304 * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
2306 enum ieee80211_hw_flags {
2307 IEEE80211_HW_HAS_RATE_CONTROL,
2308 IEEE80211_HW_RX_INCLUDES_FCS,
2309 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING,
2310 IEEE80211_HW_SIGNAL_UNSPEC,
2311 IEEE80211_HW_SIGNAL_DBM,
2312 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC,
2313 IEEE80211_HW_SPECTRUM_MGMT,
2314 IEEE80211_HW_AMPDU_AGGREGATION,
2315 IEEE80211_HW_SUPPORTS_PS,
2316 IEEE80211_HW_PS_NULLFUNC_STACK,
2317 IEEE80211_HW_SUPPORTS_DYNAMIC_PS,
2318 IEEE80211_HW_MFP_CAPABLE,
2319 IEEE80211_HW_WANT_MONITOR_VIF,
2320 IEEE80211_HW_NO_AUTO_VIF,
2321 IEEE80211_HW_SW_CRYPTO_CONTROL,
2322 IEEE80211_HW_SUPPORT_FAST_XMIT,
2323 IEEE80211_HW_REPORTS_TX_ACK_STATUS,
2324 IEEE80211_HW_CONNECTION_MONITOR,
2325 IEEE80211_HW_QUEUE_CONTROL,
2326 IEEE80211_HW_SUPPORTS_PER_STA_GTK,
2327 IEEE80211_HW_AP_LINK_PS,
2328 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW,
2329 IEEE80211_HW_SUPPORTS_RC_TABLE,
2330 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF,
2331 IEEE80211_HW_TIMING_BEACON_ONLY,
2332 IEEE80211_HW_SUPPORTS_HT_CCK_RATES,
2333 IEEE80211_HW_CHANCTX_STA_CSA,
2334 IEEE80211_HW_SUPPORTS_CLONED_SKBS,
2335 IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS,
2336 IEEE80211_HW_TDLS_WIDER_BW,
2337 IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU,
2338 IEEE80211_HW_BEACON_TX_STATUS,
2339 IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR,
2340 IEEE80211_HW_SUPPORTS_REORDERING_BUFFER,
2341 IEEE80211_HW_USES_RSS,
2342 IEEE80211_HW_TX_AMSDU,
2343 IEEE80211_HW_TX_FRAG_LIST,
2344 IEEE80211_HW_REPORTS_LOW_ACK,
2345 IEEE80211_HW_SUPPORTS_TX_FRAG,
2346 IEEE80211_HW_SUPPORTS_TDLS_BUFFER_STA,
2347 IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP,
2348 IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP,
2349 IEEE80211_HW_BUFF_MMPDU_TXQ,
2350 IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW,
2351 IEEE80211_HW_STA_MMPDU_TXQ,
2352 IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN,
2353 IEEE80211_HW_SUPPORTS_MULTI_BSSID,
2354 IEEE80211_HW_SUPPORTS_ONLY_HE_MULTI_BSSID,
2355 IEEE80211_HW_AMPDU_KEYBORDER_SUPPORT,
2357 /* keep last, obviously */
2358 NUM_IEEE80211_HW_FLAGS
2362 * struct ieee80211_hw - hardware information and state
2364 * This structure contains the configuration and hardware
2365 * information for an 802.11 PHY.
2367 * @wiphy: This points to the &struct wiphy allocated for this
2368 * 802.11 PHY. You must fill in the @perm_addr and @dev
2369 * members of this structure using SET_IEEE80211_DEV()
2370 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported
2371 * bands (with channels, bitrates) are registered here.
2373 * @conf: &struct ieee80211_conf, device configuration, don't use.
2375 * @priv: pointer to private area that was allocated for driver use
2376 * along with this structure.
2378 * @flags: hardware flags, see &enum ieee80211_hw_flags.
2380 * @extra_tx_headroom: headroom to reserve in each transmit skb
2381 * for use by the driver (e.g. for transmit headers.)
2383 * @extra_beacon_tailroom: tailroom to reserve in each beacon tx skb.
2384 * Can be used by drivers to add extra IEs.
2386 * @max_signal: Maximum value for signal (rssi) in RX information, used
2387 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB
2389 * @max_listen_interval: max listen interval in units of beacon interval
2392 * @queues: number of available hardware transmit queues for
2393 * data packets. WMM/QoS requires at least four, these
2394 * queues need to have configurable access parameters.
2396 * @rate_control_algorithm: rate control algorithm for this hardware.
2397 * If unset (NULL), the default algorithm will be used. Must be
2398 * set before calling ieee80211_register_hw().
2400 * @vif_data_size: size (in bytes) of the drv_priv data area
2401 * within &struct ieee80211_vif.
2402 * @sta_data_size: size (in bytes) of the drv_priv data area
2403 * within &struct ieee80211_sta.
2404 * @chanctx_data_size: size (in bytes) of the drv_priv data area
2405 * within &struct ieee80211_chanctx_conf.
2406 * @txq_data_size: size (in bytes) of the drv_priv data area
2407 * within @struct ieee80211_txq.
2409 * @max_rates: maximum number of alternate rate retry stages the hw
2411 * @max_report_rates: maximum number of alternate rate retry stages
2412 * the hw can report back.
2413 * @max_rate_tries: maximum number of tries for each stage
2415 * @max_rx_aggregation_subframes: maximum buffer size (number of
2416 * sub-frames) to be used for A-MPDU block ack receiver
2418 * This is only relevant if the device has restrictions on the
2419 * number of subframes, if it relies on mac80211 to do reordering
2420 * it shouldn't be set.
2422 * @max_tx_aggregation_subframes: maximum number of subframes in an
2423 * aggregate an HT/HE device will transmit. In HT AddBA we'll
2424 * advertise a constant value of 64 as some older APs crash if
2425 * the window size is smaller (an example is LinkSys WRT120N
2426 * with FW v1.0.07 build 002 Jun 18 2012).
2427 * For AddBA to HE capable peers this value will be used.
2429 * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum
2430 * of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list.
2432 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX
2433 * (if %IEEE80211_HW_QUEUE_CONTROL is set)
2435 * @radiotap_mcs_details: lists which MCS information can the HW
2436 * reports, by default it is set to _MCS, _GI and _BW but doesn't
2437 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_\* values, only
2438 * adding _BW is supported today.
2440 * @radiotap_vht_details: lists which VHT MCS information the HW reports,
2441 * the default is _GI | _BANDWIDTH.
2442 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_\* values.
2444 * @radiotap_he: HE radiotap validity flags
2446 * @radiotap_timestamp: Information for the radiotap timestamp field; if the
2447 * @units_pos member is set to a non-negative value then the timestamp
2448 * field will be added and populated from the &struct ieee80211_rx_status
2450 * @radiotap_timestamp.units_pos: Must be set to a combination of a
2451 * IEEE80211_RADIOTAP_TIMESTAMP_UNIT_* and a
2452 * IEEE80211_RADIOTAP_TIMESTAMP_SPOS_* value.
2453 * @radiotap_timestamp.accuracy: If non-negative, fills the accuracy in the
2454 * radiotap field and the accuracy known flag will be set.
2456 * @netdev_features: netdev features to be set in each netdev created
2457 * from this HW. Note that not all features are usable with mac80211,
2458 * other features will be rejected during HW registration.
2460 * @uapsd_queues: This bitmap is included in (re)association frame to indicate
2461 * for each access category if it is uAPSD trigger-enabled and delivery-
2462 * enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap.
2463 * Each bit corresponds to different AC. Value '1' in specific bit means
2464 * that corresponding AC is both trigger- and delivery-enabled. '0' means
2467 * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may
2468 * deliver to a WMM STA during any Service Period triggered by the WMM STA.
2469 * Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values.
2471 * @n_cipher_schemes: a size of an array of cipher schemes definitions.
2472 * @cipher_schemes: a pointer to an array of cipher scheme definitions
2474 * @max_nan_de_entries: maximum number of NAN DE functions supported by the
2477 * @tx_sk_pacing_shift: Pacing shift to set on TCP sockets when frames from
2478 * them are encountered. The default should typically not be changed,
2479 * unless the driver has good reasons for needing more buffers.
2481 * @weight_multiplier: Driver specific airtime weight multiplier used while
2482 * refilling deficit of each TXQ.
2484 * @max_mtu: the max mtu could be set.
2486 struct ieee80211_hw {
2487 struct ieee80211_conf conf;
2488 struct wiphy *wiphy;
2489 const char *rate_control_algorithm;
2491 unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)];
2492 unsigned int extra_tx_headroom;
2493 unsigned int extra_beacon_tailroom;
2496 int chanctx_data_size;
2499 u16 max_listen_interval;
2502 u8 max_report_rates;
2504 u16 max_rx_aggregation_subframes;
2505 u16 max_tx_aggregation_subframes;
2506 u8 max_tx_fragments;
2507 u8 offchannel_tx_hw_queue;
2508 u8 radiotap_mcs_details;
2509 u16 radiotap_vht_details;
2513 } radiotap_timestamp;
2514 netdev_features_t netdev_features;
2516 u8 uapsd_max_sp_len;
2517 u8 n_cipher_schemes;
2518 const struct ieee80211_cipher_scheme *cipher_schemes;
2519 u8 max_nan_de_entries;
2520 u8 tx_sk_pacing_shift;
2521 u8 weight_multiplier;
2525 static inline bool _ieee80211_hw_check(struct ieee80211_hw *hw,
2526 enum ieee80211_hw_flags flg)
2528 return test_bit(flg, hw->flags);
2530 #define ieee80211_hw_check(hw, flg) _ieee80211_hw_check(hw, IEEE80211_HW_##flg)
2532 static inline void _ieee80211_hw_set(struct ieee80211_hw *hw,
2533 enum ieee80211_hw_flags flg)
2535 return __set_bit(flg, hw->flags);
2537 #define ieee80211_hw_set(hw, flg) _ieee80211_hw_set(hw, IEEE80211_HW_##flg)
2540 * struct ieee80211_scan_request - hw scan request
2542 * @ies: pointers different parts of IEs (in req.ie)
2543 * @req: cfg80211 request.
2545 struct ieee80211_scan_request {
2546 struct ieee80211_scan_ies ies;
2549 struct cfg80211_scan_request req;
2553 * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters
2555 * @sta: peer this TDLS channel-switch request/response came from
2556 * @chandef: channel referenced in a TDLS channel-switch request
2557 * @action_code: see &enum ieee80211_tdls_actioncode
2558 * @status: channel-switch response status
2559 * @timestamp: time at which the frame was received
2560 * @switch_time: switch-timing parameter received in the frame
2561 * @switch_timeout: switch-timing parameter received in the frame
2562 * @tmpl_skb: TDLS switch-channel response template
2563 * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb
2565 struct ieee80211_tdls_ch_sw_params {
2566 struct ieee80211_sta *sta;
2567 struct cfg80211_chan_def *chandef;
2573 struct sk_buff *tmpl_skb;
2578 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy
2580 * @wiphy: the &struct wiphy which we want to query
2582 * mac80211 drivers can use this to get to their respective
2583 * &struct ieee80211_hw. Drivers wishing to get to their own private
2584 * structure can then access it via hw->priv. Note that mac802111 drivers should
2585 * not use wiphy_priv() to try to get their private driver structure as this
2586 * is already used internally by mac80211.
2588 * Return: The mac80211 driver hw struct of @wiphy.
2590 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy);
2593 * SET_IEEE80211_DEV - set device for 802.11 hardware
2595 * @hw: the &struct ieee80211_hw to set the device for
2596 * @dev: the &struct device of this 802.11 device
2598 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
2600 set_wiphy_dev(hw->wiphy, dev);
2604 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware
2606 * @hw: the &struct ieee80211_hw to set the MAC address for
2607 * @addr: the address to set
2609 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, const u8 *addr)
2611 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
2614 static inline struct ieee80211_rate *
2615 ieee80211_get_tx_rate(const struct ieee80211_hw *hw,
2616 const struct ieee80211_tx_info *c)
2618 if (WARN_ON_ONCE(c->control.rates[0].idx < 0))
2620 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx];
2623 static inline struct ieee80211_rate *
2624 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
2625 const struct ieee80211_tx_info *c)
2627 if (c->control.rts_cts_rate_idx < 0)
2629 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx];
2632 static inline struct ieee80211_rate *
2633 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
2634 const struct ieee80211_tx_info *c, int idx)
2636 if (c->control.rates[idx + 1].idx < 0)
2638 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx];
2642 * ieee80211_free_txskb - free TX skb
2646 * Free a transmit skb. Use this function when some failure
2647 * to transmit happened and thus status cannot be reported.
2649 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb);
2652 * DOC: Hardware crypto acceleration
2654 * mac80211 is capable of taking advantage of many hardware
2655 * acceleration designs for encryption and decryption operations.
2657 * The set_key() callback in the &struct ieee80211_ops for a given
2658 * device is called to enable hardware acceleration of encryption and
2659 * decryption. The callback takes a @sta parameter that will be NULL
2660 * for default keys or keys used for transmission only, or point to
2661 * the station information for the peer for individual keys.
2662 * Multiple transmission keys with the same key index may be used when
2663 * VLANs are configured for an access point.
2665 * When transmitting, the TX control data will use the @hw_key_idx
2666 * selected by the driver by modifying the &struct ieee80211_key_conf
2667 * pointed to by the @key parameter to the set_key() function.
2669 * The set_key() call for the %SET_KEY command should return 0 if
2670 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
2671 * added; if you return 0 then hw_key_idx must be assigned to the
2672 * hardware key index, you are free to use the full u8 range.
2674 * Note that in the case that the @IEEE80211_HW_SW_CRYPTO_CONTROL flag is
2675 * set, mac80211 will not automatically fall back to software crypto if
2676 * enabling hardware crypto failed. The set_key() call may also return the
2677 * value 1 to permit this specific key/algorithm to be done in software.
2679 * When the cmd is %DISABLE_KEY then it must succeed.
2681 * Note that it is permissible to not decrypt a frame even if a key
2682 * for it has been uploaded to hardware, the stack will not make any
2683 * decision based on whether a key has been uploaded or not but rather
2684 * based on the receive flags.
2686 * The &struct ieee80211_key_conf structure pointed to by the @key
2687 * parameter is guaranteed to be valid until another call to set_key()
2688 * removes it, but it can only be used as a cookie to differentiate
2691 * In TKIP some HW need to be provided a phase 1 key, for RX decryption
2692 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key
2694 * The update_tkip_key() call updates the driver with the new phase 1 key.
2695 * This happens every time the iv16 wraps around (every 65536 packets). The
2696 * set_key() call will happen only once for each key (unless the AP did
2697 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is
2698 * provided by update_tkip_key only. The trigger that makes mac80211 call this
2699 * handler is software decryption with wrap around of iv16.
2701 * The set_default_unicast_key() call updates the default WEP key index
2702 * configured to the hardware for WEP encryption type. This is required
2703 * for devices that support offload of data packets (e.g. ARP responses).
2705 * Mac80211 drivers should set the @NL80211_EXT_FEATURE_CAN_REPLACE_PTK0 flag
2706 * when they are able to replace in-use PTK keys according to to following
2708 * 1) They do not hand over frames decrypted with the old key to
2709 mac80211 once the call to set_key() with command %DISABLE_KEY has been
2710 completed when also setting @IEEE80211_KEY_FLAG_GENERATE_IV for any key,
2711 2) either drop or continue to use the old key for any outgoing frames queued
2712 at the time of the key deletion (including re-transmits),
2713 3) never send out a frame queued prior to the set_key() %SET_KEY command
2714 encrypted with the new key and
2715 4) never send out a frame unencrypted when it should be encrypted.
2716 Mac80211 will not queue any new frames for a deleted key to the driver.
2720 * DOC: Powersave support
2722 * mac80211 has support for various powersave implementations.
2724 * First, it can support hardware that handles all powersaving by itself,
2725 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware
2726 * flag. In that case, it will be told about the desired powersave mode
2727 * with the %IEEE80211_CONF_PS flag depending on the association status.
2728 * The hardware must take care of sending nullfunc frames when necessary,
2729 * i.e. when entering and leaving powersave mode. The hardware is required
2730 * to look at the AID in beacons and signal to the AP that it woke up when
2731 * it finds traffic directed to it.
2733 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in
2734 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused
2735 * with hardware wakeup and sleep states. Driver is responsible for waking
2736 * up the hardware before issuing commands to the hardware and putting it
2737 * back to sleep at appropriate times.
2739 * When PS is enabled, hardware needs to wakeup for beacons and receive the
2740 * buffered multicast/broadcast frames after the beacon. Also it must be
2741 * possible to send frames and receive the acknowledment frame.
2743 * Other hardware designs cannot send nullfunc frames by themselves and also
2744 * need software support for parsing the TIM bitmap. This is also supported
2745 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and
2746 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still
2747 * required to pass up beacons. The hardware is still required to handle
2748 * waking up for multicast traffic; if it cannot the driver must handle that
2749 * as best as it can, mac80211 is too slow to do that.
2751 * Dynamic powersave is an extension to normal powersave in which the
2752 * hardware stays awake for a user-specified period of time after sending a
2753 * frame so that reply frames need not be buffered and therefore delayed to
2754 * the next wakeup. It's compromise of getting good enough latency when
2755 * there's data traffic and still saving significantly power in idle
2758 * Dynamic powersave is simply supported by mac80211 enabling and disabling
2759 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS
2760 * flag and mac80211 will handle everything automatically. Additionally,
2761 * hardware having support for the dynamic PS feature may set the
2762 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support
2763 * dynamic PS mode itself. The driver needs to look at the
2764 * @dynamic_ps_timeout hardware configuration value and use it that value
2765 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable
2766 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS
2767 * enabled whenever user has enabled powersave.
2769 * Driver informs U-APSD client support by enabling
2770 * %IEEE80211_VIF_SUPPORTS_UAPSD flag. The mode is configured through the
2771 * uapsd parameter in conf_tx() operation. Hardware needs to send the QoS
2772 * Nullfunc frames and stay awake until the service period has ended. To
2773 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames
2774 * from that AC are transmitted with powersave enabled.
2776 * Note: U-APSD client mode is not yet supported with
2777 * %IEEE80211_HW_PS_NULLFUNC_STACK.
2781 * DOC: Beacon filter support
2783 * Some hardware have beacon filter support to reduce host cpu wakeups
2784 * which will reduce system power consumption. It usually works so that
2785 * the firmware creates a checksum of the beacon but omits all constantly
2786 * changing elements (TSF, TIM etc). Whenever the checksum changes the
2787 * beacon is forwarded to the host, otherwise it will be just dropped. That
2788 * way the host will only receive beacons where some relevant information
2789 * (for example ERP protection or WMM settings) have changed.
2791 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER
2792 * interface capability. The driver needs to enable beacon filter support
2793 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When
2794 * power save is enabled, the stack will not check for beacon loss and the
2795 * driver needs to notify about loss of beacons with ieee80211_beacon_loss().
2797 * The time (or number of beacons missed) until the firmware notifies the
2798 * driver of a beacon loss event (which in turn causes the driver to call
2799 * ieee80211_beacon_loss()) should be configurable and will be controlled
2800 * by mac80211 and the roaming algorithm in the future.
2802 * Since there may be constantly changing information elements that nothing
2803 * in the software stack cares about, we will, in the future, have mac80211
2804 * tell the driver which information elements are interesting in the sense
2805 * that we want to see changes in them. This will include
2807 * - a list of information element IDs
2808 * - a list of OUIs for the vendor information element
2810 * Ideally, the hardware would filter out any beacons without changes in the
2811 * requested elements, but if it cannot support that it may, at the expense
2812 * of some efficiency, filter out only a subset. For example, if the device
2813 * doesn't support checking for OUIs it should pass up all changes in all
2814 * vendor information elements.
2816 * Note that change, for the sake of simplification, also includes information
2817 * elements appearing or disappearing from the beacon.
2819 * Some hardware supports an "ignore list" instead, just make sure nothing
2820 * that was requested is on the ignore list, and include commonly changing
2821 * information element IDs in the ignore list, for example 11 (BSS load) and
2822 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136,
2823 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility
2824 * it could also include some currently unused IDs.
2827 * In addition to these capabilities, hardware should support notifying the
2828 * host of changes in the beacon RSSI. This is relevant to implement roaming
2829 * when no traffic is flowing (when traffic is flowing we see the RSSI of
2830 * the received data packets). This can consist in notifying the host when
2831 * the RSSI changes significantly or when it drops below or rises above
2832 * configurable thresholds. In the future these thresholds will also be
2833 * configured by mac80211 (which gets them from userspace) to implement
2834 * them as the roaming algorithm requires.
2836 * If the hardware cannot implement this, the driver should ask it to
2837 * periodically pass beacon frames to the host so that software can do the
2838 * signal strength threshold checking.
2842 * DOC: Spatial multiplexing power save
2844 * SMPS (Spatial multiplexing power save) is a mechanism to conserve
2845 * power in an 802.11n implementation. For details on the mechanism
2846 * and rationale, please refer to 802.11 (as amended by 802.11n-2009)
2847 * "11.2.3 SM power save".
2849 * The mac80211 implementation is capable of sending action frames
2850 * to update the AP about the station's SMPS mode, and will instruct
2851 * the driver to enter the specific mode. It will also announce the
2852 * requested SMPS mode during the association handshake. Hardware
2853 * support for this feature is required, and can be indicated by
2856 * The default mode will be "automatic", which nl80211/cfg80211
2857 * defines to be dynamic SMPS in (regular) powersave, and SMPS
2858 * turned off otherwise.
2860 * To support this feature, the driver must set the appropriate
2861 * hardware support flags, and handle the SMPS flag to the config()
2862 * operation. It will then with this mechanism be instructed to
2863 * enter the requested SMPS mode while associated to an HT AP.
2867 * DOC: Frame filtering
2869 * mac80211 requires to see many management frames for proper
2870 * operation, and users may want to see many more frames when
2871 * in monitor mode. However, for best CPU usage and power consumption,
2872 * having as few frames as possible percolate through the stack is
2873 * desirable. Hence, the hardware should filter as much as possible.
2875 * To achieve this, mac80211 uses filter flags (see below) to tell
2876 * the driver's configure_filter() function which frames should be
2877 * passed to mac80211 and which should be filtered out.
2879 * Before configure_filter() is invoked, the prepare_multicast()
2880 * callback is invoked with the parameters @mc_count and @mc_list
2881 * for the combined multicast address list of all virtual interfaces.
2882 * It's use is optional, and it returns a u64 that is passed to
2883 * configure_filter(). Additionally, configure_filter() has the
2884 * arguments @changed_flags telling which flags were changed and
2885 * @total_flags with the new flag states.
2887 * If your device has no multicast address filters your driver will
2888 * need to check both the %FIF_ALLMULTI flag and the @mc_count
2889 * parameter to see whether multicast frames should be accepted
2892 * All unsupported flags in @total_flags must be cleared.
2893 * Hardware does not support a flag if it is incapable of _passing_
2894 * the frame to the stack. Otherwise the driver must ignore
2895 * the flag, but not clear it.
2896 * You must _only_ clear the flag (announce no support for the
2897 * flag to mac80211) if you are not able to pass the packet type
2898 * to the stack (so the hardware always filters it).
2899 * So for example, you should clear @FIF_CONTROL, if your hardware
2900 * always filters control frames. If your hardware always passes
2901 * control frames to the kernel and is incapable of filtering them,
2902 * you do _not_ clear the @FIF_CONTROL flag.
2903 * This rule applies to all other FIF flags as well.
2907 * DOC: AP support for powersaving clients
2909 * In order to implement AP and P2P GO modes, mac80211 has support for
2910 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD.
2911 * There currently is no support for sAPSD.
2913 * There is one assumption that mac80211 makes, namely that a client
2914 * will not poll with PS-Poll and trigger with uAPSD at the same time.
2915 * Both are supported, and both can be used by the same client, but
2916 * they can't be used concurrently by the same client. This simplifies
2919 * The first thing to keep in mind is that there is a flag for complete
2920 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set,
2921 * mac80211 expects the driver to handle most of the state machine for
2922 * powersaving clients and will ignore the PM bit in incoming frames.
2923 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of
2924 * stations' powersave transitions. In this mode, mac80211 also doesn't
2925 * handle PS-Poll/uAPSD.
2927 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the
2928 * PM bit in incoming frames for client powersave transitions. When a
2929 * station goes to sleep, we will stop transmitting to it. There is,
2930 * however, a race condition: a station might go to sleep while there is
2931 * data buffered on hardware queues. If the device has support for this
2932 * it will reject frames, and the driver should give the frames back to
2933 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will
2934 * cause mac80211 to retry the frame when the station wakes up. The
2935 * driver is also notified of powersave transitions by calling its
2936 * @sta_notify callback.
2938 * When the station is asleep, it has three choices: it can wake up,
2939 * it can PS-Poll, or it can possibly start a uAPSD service period.
2940 * Waking up is implemented by simply transmitting all buffered (and
2941 * filtered) frames to the station. This is the easiest case. When
2942 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211
2943 * will inform the driver of this with the @allow_buffered_frames
2944 * callback; this callback is optional. mac80211 will then transmit
2945 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER
2946 * on each frame. The last frame in the service period (or the only
2947 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to
2948 * indicate that it ends the service period; as this frame must have
2949 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS.
2950 * When TX status is reported for this frame, the service period is
2951 * marked has having ended and a new one can be started by the peer.
2953 * Additionally, non-bufferable MMPDUs can also be transmitted by
2954 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them.
2956 * Another race condition can happen on some devices like iwlwifi
2957 * when there are frames queued for the station and it wakes up
2958 * or polls; the frames that are already queued could end up being
2959 * transmitted first instead, causing reordering and/or wrong
2960 * processing of the EOSP. The cause is that allowing frames to be
2961 * transmitted to a certain station is out-of-band communication to
2962 * the device. To allow this problem to be solved, the driver can
2963 * call ieee80211_sta_block_awake() if frames are buffered when it
2964 * is notified that the station went to sleep. When all these frames
2965 * have been filtered (see above), it must call the function again
2966 * to indicate that the station is no longer blocked.
2968 * If the driver buffers frames in the driver for aggregation in any
2969 * way, it must use the ieee80211_sta_set_buffered() call when it is
2970 * notified of the station going to sleep to inform mac80211 of any
2971 * TIDs that have frames buffered. Note that when a station wakes up
2972 * this information is reset (hence the requirement to call it when
2973 * informed of the station going to sleep). Then, when a service
2974 * period starts for any reason, @release_buffered_frames is called
2975 * with the number of frames to be released and which TIDs they are
2976 * to come from. In this case, the driver is responsible for setting
2977 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames,
2978 * to help the @more_data parameter is passed to tell the driver if
2979 * there is more data on other TIDs -- the TIDs to release frames
2980 * from are ignored since mac80211 doesn't know how many frames the
2981 * buffers for those TIDs contain.
2983 * If the driver also implement GO mode, where absence periods may
2984 * shorten service periods (or abort PS-Poll responses), it must
2985 * filter those response frames except in the case of frames that
2986 * are buffered in the driver -- those must remain buffered to avoid
2987 * reordering. Because it is possible that no frames are released
2988 * in this case, the driver must call ieee80211_sta_eosp()
2989 * to indicate to mac80211 that the service period ended anyway.
2991 * Finally, if frames from multiple TIDs are released from mac80211
2992 * but the driver might reorder them, it must clear & set the flags
2993 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP)
2994 * and also take care of the EOSP and MORE_DATA bits in the frame.
2995 * The driver may also use ieee80211_sta_eosp() in this case.
2997 * Note that if the driver ever buffers frames other than QoS-data
2998 * frames, it must take care to never send a non-QoS-data frame as
2999 * the last frame in a service period, adding a QoS-nulldata frame
3000 * after a non-QoS-data frame if needed.
3004 * DOC: HW queue control
3006 * Before HW queue control was introduced, mac80211 only had a single static
3007 * assignment of per-interface AC software queues to hardware queues. This
3008 * was problematic for a few reasons:
3009 * 1) off-channel transmissions might get stuck behind other frames
3010 * 2) multiple virtual interfaces couldn't be handled correctly
3011 * 3) after-DTIM frames could get stuck behind other frames
3013 * To solve this, hardware typically uses multiple different queues for all
3014 * the different usages, and this needs to be propagated into mac80211 so it
3015 * won't have the same problem with the software queues.
3017 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability
3018 * flag that tells it that the driver implements its own queue control. To do
3019 * so, the driver will set up the various queues in each &struct ieee80211_vif
3020 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will
3021 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and
3022 * if necessary will queue the frame on the right software queue that mirrors
3023 * the hardware queue.
3024 * Additionally, the driver has to then use these HW queue IDs for the queue
3025 * management functions (ieee80211_stop_queue() et al.)
3027 * The driver is free to set up the queue mappings as needed, multiple virtual
3028 * interfaces may map to the same hardware queues if needed. The setup has to
3029 * happen during add_interface or change_interface callbacks. For example, a
3030 * driver supporting station+station and station+AP modes might decide to have
3031 * 10 hardware queues to handle different scenarios:
3033 * 4 AC HW queues for 1st vif: 0, 1, 2, 3
3034 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7
3035 * after-DTIM queue for AP: 8
3036 * off-channel queue: 9
3038 * It would then set up the hardware like this:
3039 * hw.offchannel_tx_hw_queue = 9
3041 * and the first virtual interface that is added as follows:
3042 * vif.hw_queue[IEEE80211_AC_VO] = 0
3043 * vif.hw_queue[IEEE80211_AC_VI] = 1
3044 * vif.hw_queue[IEEE80211_AC_BE] = 2
3045 * vif.hw_queue[IEEE80211_AC_BK] = 3
3046 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE
3047 * and the second virtual interface with 4-7.
3049 * If queue 6 gets full, for example, mac80211 would only stop the second
3050 * virtual interface's BE queue since virtual interface queues are per AC.
3052 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE
3053 * whenever the queue is not used (i.e. the interface is not in AP mode) if the
3054 * queue could potentially be shared since mac80211 will look at cab_queue when
3055 * a queue is stopped/woken even if the interface is not in AP mode.
3059 * enum ieee80211_filter_flags - hardware filter flags
3061 * These flags determine what the filter in hardware should be
3062 * programmed to let through and what should not be passed to the
3063 * stack. It is always safe to pass more frames than requested,
3064 * but this has negative impact on power consumption.
3066 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested
3067 * by the user or if the hardware is not capable of filtering by
3068 * multicast address.
3070 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
3071 * %RX_FLAG_FAILED_FCS_CRC for them)
3073 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
3074 * the %RX_FLAG_FAILED_PLCP_CRC for them
3076 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
3077 * to the hardware that it should not filter beacons or probe responses
3078 * by BSSID. Filtering them can greatly reduce the amount of processing
3079 * mac80211 needs to do and the amount of CPU wakeups, so you should
3080 * honour this flag if possible.
3082 * @FIF_CONTROL: pass control frames (except for PS Poll) addressed to this
3085 * @FIF_OTHER_BSS: pass frames destined to other BSSes
3087 * @FIF_PSPOLL: pass PS Poll frames
3089 * @FIF_PROBE_REQ: pass probe request frames
3091 enum ieee80211_filter_flags {
3092 FIF_ALLMULTI = 1<<1,
3094 FIF_PLCPFAIL = 1<<3,
3095 FIF_BCN_PRBRESP_PROMISC = 1<<4,
3097 FIF_OTHER_BSS = 1<<6,
3099 FIF_PROBE_REQ = 1<<8,
3103 * enum ieee80211_ampdu_mlme_action - A-MPDU actions
3105 * These flags are used with the ampdu_action() callback in
3106 * &struct ieee80211_ops to indicate which action is needed.
3108 * Note that drivers MUST be able to deal with a TX aggregation
3109 * session being stopped even before they OK'ed starting it by
3110 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer
3111 * might receive the addBA frame and send a delBA right away!
3113 * @IEEE80211_AMPDU_RX_START: start RX aggregation
3114 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation
3115 * @IEEE80211_AMPDU_TX_START: start TX aggregation, the driver must either
3116 * call ieee80211_start_tx_ba_cb_irqsafe() or return the special
3117 * status %IEEE80211_AMPDU_TX_START_IMMEDIATE.
3118 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational
3119 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting
3120 * queued packets, now unaggregated. After all packets are transmitted the
3121 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe().
3122 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets,
3123 * called when the station is removed. There's no need or reason to call
3124 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the
3125 * session is gone and removes the station.
3126 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped
3127 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and
3128 * now the connection is dropped and the station will be removed. Drivers
3129 * should clean up and drop remaining packets when this is called.
3131 enum ieee80211_ampdu_mlme_action {
3132 IEEE80211_AMPDU_RX_START,
3133 IEEE80211_AMPDU_RX_STOP,
3134 IEEE80211_AMPDU_TX_START,
3135 IEEE80211_AMPDU_TX_STOP_CONT,
3136 IEEE80211_AMPDU_TX_STOP_FLUSH,
3137 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT,
3138 IEEE80211_AMPDU_TX_OPERATIONAL,
3141 #define IEEE80211_AMPDU_TX_START_IMMEDIATE 1
3144 * struct ieee80211_ampdu_params - AMPDU action parameters
3146 * @action: the ampdu action, value from %ieee80211_ampdu_mlme_action.
3147 * @sta: peer of this AMPDU session
3148 * @tid: tid of the BA session
3149 * @ssn: start sequence number of the session. TX/RX_STOP can pass 0. When
3150 * action is set to %IEEE80211_AMPDU_RX_START the driver passes back the
3151 * actual ssn value used to start the session and writes the value here.
3152 * @buf_size: reorder buffer size (number of subframes). Valid only when the
3153 * action is set to %IEEE80211_AMPDU_RX_START or
3154 * %IEEE80211_AMPDU_TX_OPERATIONAL
3155 * @amsdu: indicates the peer's ability to receive A-MSDU within A-MPDU.
3156 * valid when the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL
3157 * @timeout: BA session timeout. Valid only when the action is set to
3158 * %IEEE80211_AMPDU_RX_START
3160 struct ieee80211_ampdu_params {
3161 enum ieee80211_ampdu_mlme_action action;
3162 struct ieee80211_sta *sta;
3171 * enum ieee80211_frame_release_type - frame release reason
3172 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll
3173 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to
3174 * frame received on trigger-enabled AC
3176 enum ieee80211_frame_release_type {
3177 IEEE80211_FRAME_RELEASE_PSPOLL,
3178 IEEE80211_FRAME_RELEASE_UAPSD,
3182 * enum ieee80211_rate_control_changed - flags to indicate what changed
3184 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit
3185 * to this station changed. The actual bandwidth is in the station
3186 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40
3187 * flag changes, for HT and VHT the bandwidth field changes.
3188 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed.
3189 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer
3190 * changed (in IBSS mode) due to discovering more information about
3192 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed
3195 enum ieee80211_rate_control_changed {
3196 IEEE80211_RC_BW_CHANGED = BIT(0),
3197 IEEE80211_RC_SMPS_CHANGED = BIT(1),
3198 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2),
3199 IEEE80211_RC_NSS_CHANGED = BIT(3),
3203 * enum ieee80211_roc_type - remain on channel type
3205 * With the support for multi channel contexts and multi channel operations,
3206 * remain on channel operations might be limited/deferred/aborted by other
3207 * flows/operations which have higher priority (and vice versa).
3208 * Specifying the ROC type can be used by devices to prioritize the ROC
3209 * operations compared to other operations/flows.
3211 * @IEEE80211_ROC_TYPE_NORMAL: There are no special requirements for this ROC.
3212 * @IEEE80211_ROC_TYPE_MGMT_TX: The remain on channel request is required
3213 * for sending management frames offchannel.
3215 enum ieee80211_roc_type {
3216 IEEE80211_ROC_TYPE_NORMAL = 0,
3217 IEEE80211_ROC_TYPE_MGMT_TX,
3221 * enum ieee80211_reconfig_complete_type - reconfig type
3223 * This enum is used by the reconfig_complete() callback to indicate what
3224 * reconfiguration type was completed.
3226 * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type
3227 * (also due to resume() callback returning 1)
3228 * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless
3229 * of wowlan configuration)
3231 enum ieee80211_reconfig_type {
3232 IEEE80211_RECONFIG_TYPE_RESTART,
3233 IEEE80211_RECONFIG_TYPE_SUSPEND,
3237 * struct ieee80211_ops - callbacks from mac80211 to the driver
3239 * This structure contains various callbacks that the driver may
3240 * handle or, in some cases, must handle, for example to configure
3241 * the hardware to a new channel or to transmit a frame.
3243 * @tx: Handler that 802.11 module calls for each transmitted frame.
3244 * skb contains the buffer starting from the IEEE 802.11 header.
3245 * The low-level driver should send the frame out based on
3246 * configuration in the TX control data. This handler should,
3247 * preferably, never fail and stop queues appropriately.
3250 * @start: Called before the first netdevice attached to the hardware
3251 * is enabled. This should turn on the hardware and must turn on
3252 * frame reception (for possibly enabled monitor interfaces.)
3253 * Returns negative error codes, these may be seen in userspace,
3255 * When the device is started it should not have a MAC address
3256 * to avoid acknowledging frames before a non-monitor device
3258 * Must be implemented and can sleep.
3260 * @stop: Called after last netdevice attached to the hardware
3261 * is disabled. This should turn off the hardware (at least
3262 * it must turn off frame reception.)
3263 * May be called right after add_interface if that rejects
3264 * an interface. If you added any work onto the mac80211 workqueue
3265 * you should ensure to cancel it on this callback.
3266 * Must be implemented and can sleep.
3268 * @suspend: Suspend the device; mac80211 itself will quiesce before and
3269 * stop transmitting and doing any other configuration, and then
3270 * ask the device to suspend. This is only invoked when WoWLAN is
3271 * configured, otherwise the device is deconfigured completely and
3272 * reconfigured at resume time.
3273 * The driver may also impose special conditions under which it
3274 * wants to use the "normal" suspend (deconfigure), say if it only
3275 * supports WoWLAN when the device is associated. In this case, it
3276 * must return 1 from this function.
3278 * @resume: If WoWLAN was configured, this indicates that mac80211 is
3279 * now resuming its operation, after this the device must be fully
3280 * functional again. If this returns an error, the only way out is
3281 * to also unregister the device. If it returns 1, then mac80211
3282 * will also go through the regular complete restart on resume.
3284 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is
3285 * modified. The reason is that device_set_wakeup_enable() is
3286 * supposed to be called when the configuration changes, not only
3289 * @add_interface: Called when a netdevice attached to the hardware is
3290 * enabled. Because it is not called for monitor mode devices, @start
3291 * and @stop must be implemented.
3292 * The driver should perform any initialization it needs before
3293 * the device can be enabled. The initial configuration for the
3294 * interface is given in the conf parameter.
3295 * The callback may refuse to add an interface by returning a
3296 * negative error code (which will be seen in userspace.)
3297 * Must be implemented and can sleep.
3299 * @change_interface: Called when a netdevice changes type. This callback
3300 * is optional, but only if it is supported can interface types be
3301 * switched while the interface is UP. The callback may sleep.
3302 * Note that while an interface is being switched, it will not be
3303 * found by the interface iteration callbacks.
3305 * @remove_interface: Notifies a driver that an interface is going down.
3306 * The @stop callback is called after this if it is the last interface
3307 * and no monitor interfaces are present.
3308 * When all interfaces are removed, the MAC address in the hardware
3309 * must be cleared so the device no longer acknowledges packets,
3310 * the mac_addr member of the conf structure is, however, set to the
3311 * MAC address of the device going away.
3312 * Hence, this callback must be implemented. It can sleep.
3314 * @config: Handler for configuration requests. IEEE 802.11 code calls this
3315 * function to change hardware configuration, e.g., channel.
3316 * This function should never fail but returns a negative error code
3317 * if it does. The callback can sleep.
3319 * @bss_info_changed: Handler for configuration requests related to BSS
3320 * parameters that may vary during BSS's lifespan, and may affect low
3321 * level driver (e.g. assoc/disassoc status, erp parameters).
3322 * This function should not be used if no BSS has been set, unless
3323 * for association indication. The @changed parameter indicates which
3324 * of the bss parameters has changed when a call is made. The callback
3327 * @prepare_multicast: Prepare for multicast filter configuration.
3328 * This callback is optional, and its return value is passed
3329 * to configure_filter(). This callback must be atomic.
3331 * @configure_filter: Configure the device's RX filter.
3332 * See the section "Frame filtering" for more information.
3333 * This callback must be implemented and can sleep.
3335 * @config_iface_filter: Configure the interface's RX filter.
3336 * This callback is optional and is used to configure which frames
3337 * should be passed to mac80211. The filter_flags is the combination
3338 * of FIF_* flags. The changed_flags is a bit mask that indicates
3339 * which flags are changed.
3340 * This callback can sleep.
3342 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
3343 * must be set or cleared for a given STA. Must be atomic.
3345 * @set_key: See the section "Hardware crypto acceleration"
3346 * This callback is only called between add_interface and
3347 * remove_interface calls, i.e. while the given virtual interface
3349 * Returns a negative error code if the key can't be added.
3350 * The callback can sleep.
3352 * @update_tkip_key: See the section "Hardware crypto acceleration"
3353 * This callback will be called in the context of Rx. Called for drivers
3354 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
3355 * The callback must be atomic.
3357 * @set_rekey_data: If the device supports GTK rekeying, for example while the
3358 * host is suspended, it can assign this callback to retrieve the data
3359 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter.
3360 * After rekeying was done it should (for example during resume) notify
3361 * userspace of the new replay counter using ieee80211_gtk_rekey_notify().
3363 * @set_default_unicast_key: Set the default (unicast) key index, useful for
3364 * WEP when the device sends data packets autonomously, e.g. for ARP
3365 * offloading. The index can be 0-3, or -1 for unsetting it.
3367 * @hw_scan: Ask the hardware to service the scan request, no need to start
3368 * the scan state machine in stack. The scan must honour the channel
3369 * configuration done by the regulatory agent in the wiphy's
3370 * registered bands. The hardware (or the driver) needs to make sure
3371 * that power save is disabled.
3372 * The @req ie/ie_len members are rewritten by mac80211 to contain the
3373 * entire IEs after the SSID, so that drivers need not look at these
3374 * at all but just send them after the SSID -- mac80211 includes the
3375 * (extended) supported rates and HT information (where applicable).
3376 * When the scan finishes, ieee80211_scan_completed() must be called;
3377 * note that it also must be called when the scan cannot finish due to
3378 * any error unless this callback returned a negative error code.
3379 * This callback is also allowed to return the special return value 1,
3380 * this indicates that hardware scan isn't desirable right now and a
3381 * software scan should be done instead. A driver wishing to use this
3382 * capability must ensure its (hardware) scan capabilities aren't
3383 * advertised as more capable than mac80211's software scan is.
3384 * The callback can sleep.
3386 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan.
3387 * The driver should ask the hardware to cancel the scan (if possible),
3388 * but the scan will be completed only after the driver will call
3389 * ieee80211_scan_completed().
3390 * This callback is needed for wowlan, to prevent enqueueing a new
3391 * scan_work after the low-level driver was already suspended.
3392 * The callback can sleep.
3394 * @sched_scan_start: Ask the hardware to start scanning repeatedly at
3395 * specific intervals. The driver must call the
3396 * ieee80211_sched_scan_results() function whenever it finds results.
3397 * This process will continue until sched_scan_stop is called.
3399 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan.
3400 * In this case, ieee80211_sched_scan_stopped() must not be called.
3402 * @sw_scan_start: Notifier function that is called just before a software scan
3403 * is started. Can be NULL, if the driver doesn't need this notification.
3404 * The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR,
3405 * the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it
3406 * can use this parameter. The callback can sleep.
3408 * @sw_scan_complete: Notifier function that is called just after a
3409 * software scan finished. Can be NULL, if the driver doesn't need
3410 * this notification.
3411 * The callback can sleep.
3413 * @get_stats: Return low-level statistics.
3414 * Returns zero if statistics are available.
3415 * The callback can sleep.
3417 * @get_key_seq: If your device implements encryption in hardware and does
3418 * IV/PN assignment then this callback should be provided to read the
3419 * IV/PN for the given key from hardware.
3420 * The callback must be atomic.
3422 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this
3423 * if the device does fragmentation by itself. Note that to prevent the
3424 * stack from doing fragmentation IEEE80211_HW_SUPPORTS_TX_FRAG
3425 * should be set as well.
3426 * The callback can sleep.
3428 * @set_rts_threshold: Configuration of RTS threshold (if device needs it)
3429 * The callback can sleep.
3431 * @sta_add: Notifies low level driver about addition of an associated station,
3432 * AP, IBSS/WDS/mesh peer etc. This callback can sleep.
3434 * @sta_remove: Notifies low level driver about removal of an associated
3435 * station, AP, IBSS/WDS/mesh peer etc. Note that after the callback
3436 * returns it isn't safe to use the pointer, not even RCU protected;
3437 * no RCU grace period is guaranteed between returning here and freeing
3438 * the station. See @sta_pre_rcu_remove if needed.
3439 * This callback can sleep.
3441 * @sta_add_debugfs: Drivers can use this callback to add debugfs files
3442 * when a station is added to mac80211's station list. This callback
3443 * should be within a CONFIG_MAC80211_DEBUGFS conditional. This
3444 * callback can sleep.
3446 * @sta_notify: Notifies low level driver about power state transition of an
3447 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating
3448 * in AP mode, this callback will not be called when the flag
3449 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic.
3451 * @sta_state: Notifies low level driver about state transition of a
3452 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.)
3453 * This callback is mutually exclusive with @sta_add/@sta_remove.
3454 * It must not fail for down transitions but may fail for transitions
3455 * up the list of states. Also note that after the callback returns it
3456 * isn't safe to use the pointer, not even RCU protected - no RCU grace
3457 * period is guaranteed between returning here and freeing the station.
3458 * See @sta_pre_rcu_remove if needed.
3459 * The callback can sleep.
3461 * @sta_pre_rcu_remove: Notify driver about station removal before RCU
3462 * synchronisation. This is useful if a driver needs to have station
3463 * pointers protected using RCU, it can then use this call to clear
3464 * the pointers instead of waiting for an RCU grace period to elapse
3466 * The callback can sleep.
3468 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be
3469 * used to transmit to the station. The changes are advertised with bits
3470 * from &enum ieee80211_rate_control_changed and the values are reflected
3471 * in the station data. This callback should only be used when the driver
3472 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since
3473 * otherwise the rate control algorithm is notified directly.
3475 * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This
3476 * is only used if the configured rate control algorithm actually uses
3477 * the new rate table API, and is therefore optional. Must be atomic.
3479 * @sta_statistics: Get statistics for this station. For example with beacon
3480 * filtering, the statistics kept by mac80211 might not be accurate, so
3481 * let the driver pre-fill the statistics. The driver can fill most of
3482 * the values (indicating which by setting the filled bitmap), but not
3483 * all of them make sense - see the source for which ones are possible.
3484 * Statistics that the driver doesn't fill will be filled by mac80211.
3485 * The callback can sleep.
3487 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
3488 * bursting) for a hardware TX queue.
3489 * Returns a negative error code on failure.
3490 * The callback can sleep.
3492 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
3493 * this is only used for IBSS mode BSSID merging and debugging. Is not a
3494 * required function.
3495 * The callback can sleep.
3497 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware.
3498 * Currently, this is only used for IBSS mode debugging. Is not a
3499 * required function.
3500 * The callback can sleep.
3502 * @offset_tsf: Offset the TSF timer by the specified value in the
3503 * firmware/hardware. Preferred to set_tsf as it avoids delay between
3504 * calling set_tsf() and hardware getting programmed, which will show up
3505 * as TSF delay. Is not a required function.
3506 * The callback can sleep.
3508 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
3509 * with other STAs in the IBSS. This is only used in IBSS mode. This
3510 * function is optional if the firmware/hardware takes full care of
3511 * TSF synchronization.
3512 * The callback can sleep.
3514 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
3515 * This is needed only for IBSS mode and the result of this function is
3516 * used to determine whether to reply to Probe Requests.
3517 * Returns non-zero if this device sent the last beacon.
3518 * The callback can sleep.
3520 * @get_survey: Return per-channel survey information
3522 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also
3523 * need to set wiphy->rfkill_poll to %true before registration,
3524 * and need to call wiphy_rfkill_set_hw_state() in the callback.
3525 * The callback can sleep.
3527 * @set_coverage_class: Set slot time for given coverage class as specified
3528 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout
3529 * accordingly; coverage class equals to -1 to enable ACK timeout
3530 * estimation algorithm (dynack). To disable dynack set valid value for
3531 * coverage class. This callback is not required and may sleep.
3533 * @testmode_cmd: Implement a cfg80211 test mode command. The passed @vif may
3534 * be %NULL. The callback can sleep.
3535 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep.
3537 * @flush: Flush all pending frames from the hardware queue, making sure
3538 * that the hardware queues are empty. The @queues parameter is a bitmap
3539 * of queues to flush, which is useful if different virtual interfaces
3540 * use different hardware queues; it may also indicate all queues.
3541 * If the parameter @drop is set to %true, pending frames may be dropped.
3542 * Note that vif can be NULL.
3543 * The callback can sleep.
3545 * @channel_switch: Drivers that need (or want) to offload the channel
3546 * switch operation for CSAs received from the AP may implement this
3547 * callback. They must then call ieee80211_chswitch_done() to indicate
3548 * completion of the channel switch.
3550 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device.
3551 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may
3552 * reject TX/RX mask combinations they cannot support by returning -EINVAL
3553 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX).
3555 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant).
3557 * @remain_on_channel: Starts an off-channel period on the given channel, must
3558 * call back to ieee80211_ready_on_channel() when on that channel. Note
3559 * that normal channel traffic is not stopped as this is intended for hw
3560 * offload. Frames to transmit on the off-channel channel are transmitted
3561 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the
3562 * duration (which will always be non-zero) expires, the driver must call
3563 * ieee80211_remain_on_channel_expired().
3564 * Note that this callback may be called while the device is in IDLE and
3565 * must be accepted in this case.
3566 * This callback may sleep.
3567 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is
3568 * aborted before it expires. This callback may sleep.
3570 * @set_ringparam: Set tx and rx ring sizes.
3572 * @get_ringparam: Get tx and rx ring current and maximum sizes.
3574 * @tx_frames_pending: Check if there is any pending frame in the hardware
3575 * queues before entering power save.
3577 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection
3578 * when transmitting a frame. Currently only legacy rates are handled.
3579 * The callback can sleep.
3580 * @event_callback: Notify driver about any event in mac80211. See
3581 * &enum ieee80211_event_type for the different types.
3582 * The callback must be atomic.
3584 * @release_buffered_frames: Release buffered frames according to the given
3585 * parameters. In the case where the driver buffers some frames for
3586 * sleeping stations mac80211 will use this callback to tell the driver
3587 * to release some frames, either for PS-poll or uAPSD.
3588 * Note that if the @more_data parameter is %false the driver must check
3589 * if there are more frames on the given TIDs, and if there are more than
3590 * the frames being released then it must still set the more-data bit in
3591 * the frame. If the @more_data parameter is %true, then of course the
3592 * more-data bit must always be set.
3593 * The @tids parameter tells the driver which TIDs to release frames
3594 * from, for PS-poll it will always have only a single bit set.
3595 * In the case this is used for a PS-poll initiated release, the
3596 * @num_frames parameter will always be 1 so code can be shared. In
3597 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag
3598 * on the TX status (and must report TX status) so that the PS-poll
3599 * period is properly ended. This is used to avoid sending multiple
3600 * responses for a retried PS-poll frame.
3601 * In the case this is used for uAPSD, the @num_frames parameter may be
3602 * bigger than one, but the driver may send fewer frames (it must send
3603 * at least one, however). In this case it is also responsible for
3604 * setting the EOSP flag in the QoS header of the frames. Also, when the
3605 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP
3606 * on the last frame in the SP. Alternatively, it may call the function
3607 * ieee80211_sta_eosp() to inform mac80211 of the end of the SP.
3608 * This callback must be atomic.
3609 * @allow_buffered_frames: Prepare device to allow the given number of frames
3610 * to go out to the given station. The frames will be sent by mac80211
3611 * via the usual TX path after this call. The TX information for frames
3612 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set
3613 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case
3614 * frames from multiple TIDs are released and the driver might reorder
3615 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag
3616 * on the last frame and clear it on all others and also handle the EOSP
3617 * bit in the QoS header correctly. Alternatively, it can also call the
3618 * ieee80211_sta_eosp() function.
3619 * The @tids parameter is a bitmap and tells the driver which TIDs the
3620 * frames will be on; it will at most have two bits set.
3621 * This callback must be atomic.
3623 * @get_et_sset_count: Ethtool API to get string-set count.
3625 * @get_et_stats: Ethtool API to get a set of u64 stats.
3627 * @get_et_strings: Ethtool API to get a set of strings to describe stats
3628 * and perhaps other supported types of ethtool data-sets.
3630 * @mgd_prepare_tx: Prepare for transmitting a management frame for association
3631 * before associated. In multi-channel scenarios, a virtual interface is
3632 * bound to a channel before it is associated, but as it isn't associated
3633 * yet it need not necessarily be given airtime, in particular since any
3634 * transmission to a P2P GO needs to be synchronized against the GO's
3635 * powersave state. mac80211 will call this function before transmitting a
3636 * management frame prior to having successfully associated to allow the
3637 * driver to give it channel time for the transmission, to get a response
3638 * and to be able to synchronize with the GO.
3639 * For drivers that set %IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP, mac80211
3640 * would also call this function before transmitting a deauthentication
3641 * frame in case that no beacon was heard from the AP/P2P GO.
3642 * The callback will be called before each transmission and upon return
3643 * mac80211 will transmit the frame right away.
3644 * If duration is greater than zero, mac80211 hints to the driver the
3645 * duration for which the operation is requested.
3646 * The callback is optional and can (should!) sleep.
3648 * @mgd_protect_tdls_discover: Protect a TDLS discovery session. After sending
3649 * a TDLS discovery-request, we expect a reply to arrive on the AP's
3650 * channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS
3651 * setup-response is a direct packet not buffered by the AP.
3652 * mac80211 will call this function just before the transmission of a TDLS
3653 * discovery-request. The recommended period of protection is at least
3654 * 2 * (DTIM period).
3655 * The callback is optional and can sleep.
3657 * @add_chanctx: Notifies device driver about new channel context creation.
3658 * This callback may sleep.
3659 * @remove_chanctx: Notifies device driver about channel context destruction.
3660 * This callback may sleep.
3661 * @change_chanctx: Notifies device driver about channel context changes that
3662 * may happen when combining different virtual interfaces on the same
3663 * channel context with different settings
3664 * This callback may sleep.
3665 * @assign_vif_chanctx: Notifies device driver about channel context being bound
3666 * to vif. Possible use is for hw queue remapping.
3667 * This callback may sleep.
3668 * @unassign_vif_chanctx: Notifies device driver about channel context being
3670 * This callback may sleep.
3671 * @switch_vif_chanctx: switch a number of vifs from one chanctx to
3672 * another, as specified in the list of
3673 * @ieee80211_vif_chanctx_switch passed to the driver, according
3674 * to the mode defined in &ieee80211_chanctx_switch_mode.
3675 * This callback may sleep.
3677 * @start_ap: Start operation on the AP interface, this is called after all the
3678 * information in bss_conf is set and beacon can be retrieved. A channel
3679 * context is bound before this is called. Note that if the driver uses
3680 * software scan or ROC, this (and @stop_ap) isn't called when the AP is
3681 * just "paused" for scanning/ROC, which is indicated by the beacon being
3682 * disabled/enabled via @bss_info_changed.
3683 * @stop_ap: Stop operation on the AP interface.
3685 * @reconfig_complete: Called after a call to ieee80211_restart_hw() and
3686 * during resume, when the reconfiguration has completed.
3687 * This can help the driver implement the reconfiguration step (and
3688 * indicate mac80211 is ready to receive frames).
3689 * This callback may sleep.
3691 * @ipv6_addr_change: IPv6 address assignment on the given interface changed.
3692 * Currently, this is only called for managed or P2P client interfaces.
3693 * This callback is optional; it must not sleep.
3695 * @channel_switch_beacon: Starts a channel switch to a new channel.
3696 * Beacons are modified to include CSA or ECSA IEs before calling this
3697 * function. The corresponding count fields in these IEs must be
3698 * decremented, and when they reach 1 the driver must call
3699 * ieee80211_csa_finish(). Drivers which use ieee80211_beacon_get()
3700 * get the csa counter decremented by mac80211, but must check if it is
3701 * 1 using ieee80211_csa_is_complete() after the beacon has been
3702 * transmitted and then call ieee80211_csa_finish().
3703 * If the CSA count starts as zero or 1, this function will not be called,
3704 * since there won't be any time to beacon before the switch anyway.
3705 * @pre_channel_switch: This is an optional callback that is called
3706 * before a channel switch procedure is started (ie. when a STA
3707 * gets a CSA or a userspace initiated channel-switch), allowing
3708 * the driver to prepare for the channel switch.
3709 * @post_channel_switch: This is an optional callback that is called
3710 * after a channel switch procedure is completed, allowing the
3711 * driver to go back to a normal configuration.
3712 * @abort_channel_switch: This is an optional callback that is called
3713 * when channel switch procedure was completed, allowing the
3714 * driver to go back to a normal configuration.
3715 * @channel_switch_rx_beacon: This is an optional callback that is called
3716 * when channel switch procedure is in progress and additional beacon with
3717 * CSA IE was received, allowing driver to track changes in count.
3718 * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all
3719 * information in bss_conf is set up and the beacon can be retrieved. A
3720 * channel context is bound before this is called.
3721 * @leave_ibss: Leave the IBSS again.
3723 * @get_expected_throughput: extract the expected throughput towards the
3724 * specified station. The returned value is expressed in Kbps. It returns 0
3725 * if the RC algorithm does not have proper data to provide.
3727 * @get_txpower: get current maximum tx power (in dBm) based on configuration
3728 * and hardware limits.
3730 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver
3731 * is responsible for continually initiating channel-switching operations
3732 * and returning to the base channel for communication with the AP. The
3733 * driver receives a channel-switch request template and the location of
3734 * the switch-timing IE within the template as part of the invocation.
3735 * The template is valid only within the call, and the driver can
3736 * optionally copy the skb for further re-use.
3737 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both
3738 * peers must be on the base channel when the call completes.
3739 * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or
3740 * response) has been received from a remote peer. The driver gets
3741 * parameters parsed from the incoming frame and may use them to continue
3742 * an ongoing channel-switch operation. In addition, a channel-switch
3743 * response template is provided, together with the location of the
3744 * switch-timing IE within the template. The skb can only be used within
3745 * the function call.
3747 * @wake_tx_queue: Called when new packets have been added to the queue.
3748 * @sync_rx_queues: Process all pending frames in RSS queues. This is a
3749 * synchronization which is needed in case driver has in its RSS queues
3750 * pending frames that were received prior to the control path action
3751 * currently taken (e.g. disassociation) but are not processed yet.
3753 * @start_nan: join an existing NAN cluster, or create a new one.
3754 * @stop_nan: leave the NAN cluster.
3755 * @nan_change_conf: change NAN configuration. The data in cfg80211_nan_conf
3756 * contains full new configuration and changes specify which parameters
3757 * are changed with respect to the last NAN config.
3758 * The driver gets both full configuration and the changed parameters since
3759 * some devices may need the full configuration while others need only the
3760 * changed parameters.
3761 * @add_nan_func: Add a NAN function. Returns 0 on success. The data in
3762 * cfg80211_nan_func must not be referenced outside the scope of
3764 * @del_nan_func: Remove a NAN function. The driver must call
3765 * ieee80211_nan_func_terminated() with
3766 * NL80211_NAN_FUNC_TERM_REASON_USER_REQUEST reason code upon removal.
3767 * @can_aggregate_in_amsdu: Called in order to determine if HW supports
3768 * aggregating two specific frames in the same A-MSDU. The relation
3769 * between the skbs should be symmetric and transitive. Note that while
3770 * skb is always a real frame, head may or may not be an A-MSDU.
3771 * @get_ftm_responder_stats: Retrieve FTM responder statistics, if available.
3772 * Statistics should be cumulative, currently no way to reset is provided.
3774 * @start_pmsr: start peer measurement (e.g. FTM) (this call can sleep)
3775 * @abort_pmsr: abort peer measurement (this call can sleep)
3777 struct ieee80211_ops {
3778 void (*tx)(struct ieee80211_hw *hw,
3779 struct ieee80211_tx_control *control,
3780 struct sk_buff *skb);
3781 int (*start)(struct ieee80211_hw *hw);
3782 void (*stop)(struct ieee80211_hw *hw);
3784 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan);
3785 int (*resume)(struct ieee80211_hw *hw);
3786 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled);
3788 int (*add_interface)(struct ieee80211_hw *hw,
3789 struct ieee80211_vif *vif);
3790 int (*change_interface)(struct ieee80211_hw *hw,
3791 struct ieee80211_vif *vif,
3792 enum nl80211_iftype new_type, bool p2p);
3793 void (*remove_interface)(struct ieee80211_hw *hw,
3794 struct ieee80211_vif *vif);
3795 int (*config)(struct ieee80211_hw *hw, u32 changed);
3796 void (*bss_info_changed)(struct ieee80211_hw *hw,
3797 struct ieee80211_vif *vif,
3798 struct ieee80211_bss_conf *info,
3801 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
3802 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
3804 u64 (*prepare_multicast)(struct ieee80211_hw *hw,
3805 struct netdev_hw_addr_list *mc_list);
3806 void (*configure_filter)(struct ieee80211_hw *hw,
3807 unsigned int changed_flags,
3808 unsigned int *total_flags,
3810 void (*config_iface_filter)(struct ieee80211_hw *hw,
3811 struct ieee80211_vif *vif,
3812 unsigned int filter_flags,
3813 unsigned int changed_flags);
3814 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
3816 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3817 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
3818 struct ieee80211_key_conf *key);
3819 void (*update_tkip_key)(struct ieee80211_hw *hw,
3820 struct ieee80211_vif *vif,
3821 struct ieee80211_key_conf *conf,
3822 struct ieee80211_sta *sta,
3823 u32 iv32, u16 *phase1key);
3824 void (*set_rekey_data)(struct ieee80211_hw *hw,
3825 struct ieee80211_vif *vif,
3826 struct cfg80211_gtk_rekey_data *data);
3827 void (*set_default_unicast_key)(struct ieee80211_hw *hw,
3828 struct ieee80211_vif *vif, int idx);
3829 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3830 struct ieee80211_scan_request *req);
3831 void (*cancel_hw_scan)(struct ieee80211_hw *hw,
3832 struct ieee80211_vif *vif);
3833 int (*sched_scan_start)(struct ieee80211_hw *hw,
3834 struct ieee80211_vif *vif,
3835 struct cfg80211_sched_scan_request *req,
3836 struct ieee80211_scan_ies *ies);
3837 int (*sched_scan_stop)(struct ieee80211_hw *hw,
3838 struct ieee80211_vif *vif);
3839 void (*sw_scan_start)(struct ieee80211_hw *hw,
3840 struct ieee80211_vif *vif,
3841 const u8 *mac_addr);
3842 void (*sw_scan_complete)(struct ieee80211_hw *hw,
3843 struct ieee80211_vif *vif);
3844 int (*get_stats)(struct ieee80211_hw *hw,
3845 struct ieee80211_low_level_stats *stats);
3846 void (*get_key_seq)(struct ieee80211_hw *hw,
3847 struct ieee80211_key_conf *key,
3848 struct ieee80211_key_seq *seq);
3849 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
3850 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
3851 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3852 struct ieee80211_sta *sta);
3853 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3854 struct ieee80211_sta *sta);
3855 #ifdef CONFIG_MAC80211_DEBUGFS
3856 void (*sta_add_debugfs)(struct ieee80211_hw *hw,
3857 struct ieee80211_vif *vif,
3858 struct ieee80211_sta *sta,
3859 struct dentry *dir);
3861 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3862 enum sta_notify_cmd, struct ieee80211_sta *sta);
3863 int (*sta_set_txpwr)(struct ieee80211_hw *hw,
3864 struct ieee80211_vif *vif,
3865 struct ieee80211_sta *sta);
3866 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3867 struct ieee80211_sta *sta,
3868 enum ieee80211_sta_state old_state,
3869 enum ieee80211_sta_state new_state);
3870 void (*sta_pre_rcu_remove)(struct ieee80211_hw *hw,
3871 struct ieee80211_vif *vif,
3872 struct ieee80211_sta *sta);
3873 void (*sta_rc_update)(struct ieee80211_hw *hw,
3874 struct ieee80211_vif *vif,
3875 struct ieee80211_sta *sta,
3877 void (*sta_rate_tbl_update)(struct ieee80211_hw *hw,
3878 struct ieee80211_vif *vif,
3879 struct ieee80211_sta *sta);
3880 void (*sta_statistics)(struct ieee80211_hw *hw,
3881 struct ieee80211_vif *vif,
3882 struct ieee80211_sta *sta,
3883 struct station_info *sinfo);
3884 int (*conf_tx)(struct ieee80211_hw *hw,
3885 struct ieee80211_vif *vif, u16 ac,
3886 const struct ieee80211_tx_queue_params *params);
3887 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
3888 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3890 void (*offset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3892 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
3893 int (*tx_last_beacon)(struct ieee80211_hw *hw);
3897 * Perform a certain A-MPDU action.
3898 * The RA/TID combination determines the destination and TID we want
3899 * the ampdu action to be performed for. The action is defined through
3900 * ieee80211_ampdu_mlme_action.
3901 * When the action is set to %IEEE80211_AMPDU_TX_OPERATIONAL the driver
3902 * may neither send aggregates containing more subframes than @buf_size
3903 * nor send aggregates in a way that lost frames would exceed the
3904 * buffer size. If just limiting the aggregate size, this would be
3905 * possible with a buf_size of 8:
3908 * - ``RX: 2....7`` (lost frame #1)
3911 * which is invalid since #1 was now re-transmitted well past the
3912 * buffer size of 8. Correct ways to retransmit #1 would be:
3918 * Even ``189`` would be wrong since 1 could be lost again.
3920 * Returns a negative error code on failure. The driver may return
3921 * %IEEE80211_AMPDU_TX_START_IMMEDIATE for %IEEE80211_AMPDU_TX_START
3922 * if the session can start immediately.
3924 * The callback can sleep.
3926 int (*ampdu_action)(struct ieee80211_hw *hw,
3927 struct ieee80211_vif *vif,
3928 struct ieee80211_ampdu_params *params);
3929 int (*get_survey)(struct ieee80211_hw *hw, int idx,
3930 struct survey_info *survey);
3931 void (*rfkill_poll)(struct ieee80211_hw *hw);
3932 void (*set_coverage_class)(struct ieee80211_hw *hw, s16 coverage_class);
3933 #ifdef CONFIG_NL80211_TESTMODE
3934 int (*testmode_cmd)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3935 void *data, int len);
3936 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb,
3937 struct netlink_callback *cb,
3938 void *data, int len);
3940 void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3941 u32 queues, bool drop);
3942 void (*channel_switch)(struct ieee80211_hw *hw,
3943 struct ieee80211_vif *vif,
3944 struct ieee80211_channel_switch *ch_switch);
3945 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
3946 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
3948 int (*remain_on_channel)(struct ieee80211_hw *hw,
3949 struct ieee80211_vif *vif,
3950 struct ieee80211_channel *chan,
3952 enum ieee80211_roc_type type);
3953 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw,
3954 struct ieee80211_vif *vif);
3955 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx);
3956 void (*get_ringparam)(struct ieee80211_hw *hw,
3957 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
3958 bool (*tx_frames_pending)(struct ieee80211_hw *hw);
3959 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3960 const struct cfg80211_bitrate_mask *mask);
3961 void (*event_callback)(struct ieee80211_hw *hw,
3962 struct ieee80211_vif *vif,
3963 const struct ieee80211_event *event);
3965 void (*allow_buffered_frames)(struct ieee80211_hw *hw,
3966 struct ieee80211_sta *sta,
3967 u16 tids, int num_frames,
3968 enum ieee80211_frame_release_type reason,
3970 void (*release_buffered_frames)(struct ieee80211_hw *hw,
3971 struct ieee80211_sta *sta,
3972 u16 tids, int num_frames,
3973 enum ieee80211_frame_release_type reason,
3976 int (*get_et_sset_count)(struct ieee80211_hw *hw,
3977 struct ieee80211_vif *vif, int sset);
3978 void (*get_et_stats)(struct ieee80211_hw *hw,
3979 struct ieee80211_vif *vif,
3980 struct ethtool_stats *stats, u64 *data);
3981 void (*get_et_strings)(struct ieee80211_hw *hw,
3982 struct ieee80211_vif *vif,
3983 u32 sset, u8 *data);
3985 void (*mgd_prepare_tx)(struct ieee80211_hw *hw,
3986 struct ieee80211_vif *vif,
3989 void (*mgd_protect_tdls_discover)(struct ieee80211_hw *hw,
3990 struct ieee80211_vif *vif);
3992 int (*add_chanctx)(struct ieee80211_hw *hw,
3993 struct ieee80211_chanctx_conf *ctx);
3994 void (*remove_chanctx)(struct ieee80211_hw *hw,
3995 struct ieee80211_chanctx_conf *ctx);
3996 void (*change_chanctx)(struct ieee80211_hw *hw,
3997 struct ieee80211_chanctx_conf *ctx,
3999 int (*assign_vif_chanctx)(struct ieee80211_hw *hw,
4000 struct ieee80211_vif *vif,
4001 struct ieee80211_chanctx_conf *ctx);
4002 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw,
4003 struct ieee80211_vif *vif,
4004 struct ieee80211_chanctx_conf *ctx);
4005 int (*switch_vif_chanctx)(struct ieee80211_hw *hw,
4006 struct ieee80211_vif_chanctx_switch *vifs,
4008 enum ieee80211_chanctx_switch_mode mode);
4010 void (*reconfig_complete)(struct ieee80211_hw *hw,
4011 enum ieee80211_reconfig_type reconfig_type);
4013 #if IS_ENABLED(CONFIG_IPV6)
4014 void (*ipv6_addr_change)(struct ieee80211_hw *hw,
4015 struct ieee80211_vif *vif,
4016 struct inet6_dev *idev);
4018 void (*channel_switch_beacon)(struct ieee80211_hw *hw,
4019 struct ieee80211_vif *vif,
4020 struct cfg80211_chan_def *chandef);
4021 int (*pre_channel_switch)(struct ieee80211_hw *hw,
4022 struct ieee80211_vif *vif,
4023 struct ieee80211_channel_switch *ch_switch);
4025 int (*post_channel_switch)(struct ieee80211_hw *hw,
4026 struct ieee80211_vif *vif);
4027 void (*abort_channel_switch)(struct ieee80211_hw *hw,
4028 struct ieee80211_vif *vif);
4029 void (*channel_switch_rx_beacon)(struct ieee80211_hw *hw,
4030 struct ieee80211_vif *vif,
4031 struct ieee80211_channel_switch *ch_switch);
4033 int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
4034 void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
4035 u32 (*get_expected_throughput)(struct ieee80211_hw *hw,
4036 struct ieee80211_sta *sta);
4037 int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4040 int (*tdls_channel_switch)(struct ieee80211_hw *hw,
4041 struct ieee80211_vif *vif,
4042 struct ieee80211_sta *sta, u8 oper_class,
4043 struct cfg80211_chan_def *chandef,
4044 struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie);
4045 void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw,
4046 struct ieee80211_vif *vif,
4047 struct ieee80211_sta *sta);
4048 void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw,
4049 struct ieee80211_vif *vif,
4050 struct ieee80211_tdls_ch_sw_params *params);
4052 void (*wake_tx_queue)(struct ieee80211_hw *hw,
4053 struct ieee80211_txq *txq);
4054 void (*sync_rx_queues)(struct ieee80211_hw *hw);
4056 int (*start_nan)(struct ieee80211_hw *hw,
4057 struct ieee80211_vif *vif,
4058 struct cfg80211_nan_conf *conf);
4059 int (*stop_nan)(struct ieee80211_hw *hw,
4060 struct ieee80211_vif *vif);
4061 int (*nan_change_conf)(struct ieee80211_hw *hw,
4062 struct ieee80211_vif *vif,
4063 struct cfg80211_nan_conf *conf, u32 changes);
4064 int (*add_nan_func)(struct ieee80211_hw *hw,
4065 struct ieee80211_vif *vif,
4066 const struct cfg80211_nan_func *nan_func);
4067 void (*del_nan_func)(struct ieee80211_hw *hw,
4068 struct ieee80211_vif *vif,
4070 bool (*can_aggregate_in_amsdu)(struct ieee80211_hw *hw,
4071 struct sk_buff *head,
4072 struct sk_buff *skb);
4073 int (*get_ftm_responder_stats)(struct ieee80211_hw *hw,
4074 struct ieee80211_vif *vif,
4075 struct cfg80211_ftm_responder_stats *ftm_stats);
4076 int (*start_pmsr)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4077 struct cfg80211_pmsr_request *request);
4078 void (*abort_pmsr)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4079 struct cfg80211_pmsr_request *request);
4083 * ieee80211_alloc_hw_nm - Allocate a new hardware device
4085 * This must be called once for each hardware device. The returned pointer
4086 * must be used to refer to this device when calling other functions.
4087 * mac80211 allocates a private data area for the driver pointed to by
4088 * @priv in &struct ieee80211_hw, the size of this area is given as
4091 * @priv_data_len: length of private data
4092 * @ops: callbacks for this device
4093 * @requested_name: Requested name for this device.
4094 * NULL is valid value, and means use the default naming (phy%d)
4096 * Return: A pointer to the new hardware device, or %NULL on error.
4098 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
4099 const struct ieee80211_ops *ops,
4100 const char *requested_name);
4103 * ieee80211_alloc_hw - Allocate a new hardware device
4105 * This must be called once for each hardware device. The returned pointer
4106 * must be used to refer to this device when calling other functions.
4107 * mac80211 allocates a private data area for the driver pointed to by
4108 * @priv in &struct ieee80211_hw, the size of this area is given as
4111 * @priv_data_len: length of private data
4112 * @ops: callbacks for this device
4114 * Return: A pointer to the new hardware device, or %NULL on error.
4117 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
4118 const struct ieee80211_ops *ops)
4120 return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL);
4124 * ieee80211_register_hw - Register hardware device
4126 * You must call this function before any other functions in
4127 * mac80211. Note that before a hardware can be registered, you
4128 * need to fill the contained wiphy's information.
4130 * @hw: the device to register as returned by ieee80211_alloc_hw()
4132 * Return: 0 on success. An error code otherwise.
4134 int ieee80211_register_hw(struct ieee80211_hw *hw);
4137 * struct ieee80211_tpt_blink - throughput blink description
4138 * @throughput: throughput in Kbit/sec
4139 * @blink_time: blink time in milliseconds
4140 * (full cycle, ie. one off + one on period)
4142 struct ieee80211_tpt_blink {
4148 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags
4149 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio
4150 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working
4151 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one
4152 * interface is connected in some way, including being an AP
4154 enum ieee80211_tpt_led_trigger_flags {
4155 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0),
4156 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1),
4157 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2),
4160 #ifdef CONFIG_MAC80211_LEDS
4161 const char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
4162 const char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
4163 const char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
4164 const char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw);
4166 __ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw,
4168 const struct ieee80211_tpt_blink *blink_table,
4169 unsigned int blink_table_len);
4172 * ieee80211_get_tx_led_name - get name of TX LED
4174 * mac80211 creates a transmit LED trigger for each wireless hardware
4175 * that can be used to drive LEDs if your driver registers a LED device.
4176 * This function returns the name (or %NULL if not configured for LEDs)
4177 * of the trigger so you can automatically link the LED device.
4179 * @hw: the hardware to get the LED trigger name for
4181 * Return: The name of the LED trigger. %NULL if not configured for LEDs.
4183 static inline const char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
4185 #ifdef CONFIG_MAC80211_LEDS
4186 return __ieee80211_get_tx_led_name(hw);
4193 * ieee80211_get_rx_led_name - get name of RX LED
4195 * mac80211 creates a receive LED trigger for each wireless hardware
4196 * that can be used to drive LEDs if your driver registers a LED device.
4197 * This function returns the name (or %NULL if not configured for LEDs)
4198 * of the trigger so you can automatically link the LED device.
4200 * @hw: the hardware to get the LED trigger name for
4202 * Return: The name of the LED trigger. %NULL if not configured for LEDs.
4204 static inline const char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
4206 #ifdef CONFIG_MAC80211_LEDS
4207 return __ieee80211_get_rx_led_name(hw);
4214 * ieee80211_get_assoc_led_name - get name of association LED
4216 * mac80211 creates a association LED trigger for each wireless hardware
4217 * that can be used to drive LEDs if your driver registers a LED device.
4218 * This function returns the name (or %NULL if not configured for LEDs)
4219 * of the trigger so you can automatically link the LED device.
4221 * @hw: the hardware to get the LED trigger name for
4223 * Return: The name of the LED trigger. %NULL if not configured for LEDs.
4225 static inline const char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
4227 #ifdef CONFIG_MAC80211_LEDS
4228 return __ieee80211_get_assoc_led_name(hw);
4235 * ieee80211_get_radio_led_name - get name of radio LED
4237 * mac80211 creates a radio change LED trigger for each wireless hardware
4238 * that can be used to drive LEDs if your driver registers a LED device.
4239 * This function returns the name (or %NULL if not configured for LEDs)
4240 * of the trigger so you can automatically link the LED device.
4242 * @hw: the hardware to get the LED trigger name for
4244 * Return: The name of the LED trigger. %NULL if not configured for LEDs.
4246 static inline const char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
4248 #ifdef CONFIG_MAC80211_LEDS
4249 return __ieee80211_get_radio_led_name(hw);
4256 * ieee80211_create_tpt_led_trigger - create throughput LED trigger
4257 * @hw: the hardware to create the trigger for
4258 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags
4259 * @blink_table: the blink table -- needs to be ordered by throughput
4260 * @blink_table_len: size of the blink table
4262 * Return: %NULL (in case of error, or if no LED triggers are
4263 * configured) or the name of the new trigger.
4265 * Note: This function must be called before ieee80211_register_hw().
4267 static inline const char *
4268 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags,
4269 const struct ieee80211_tpt_blink *blink_table,
4270 unsigned int blink_table_len)
4272 #ifdef CONFIG_MAC80211_LEDS
4273 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table,
4281 * ieee80211_unregister_hw - Unregister a hardware device
4283 * This function instructs mac80211 to free allocated resources
4284 * and unregister netdevices from the networking subsystem.
4286 * @hw: the hardware to unregister
4288 void ieee80211_unregister_hw(struct ieee80211_hw *hw);
4291 * ieee80211_free_hw - free hardware descriptor
4293 * This function frees everything that was allocated, including the
4294 * private data for the driver. You must call ieee80211_unregister_hw()
4295 * before calling this function.
4297 * @hw: the hardware to free
4299 void ieee80211_free_hw(struct ieee80211_hw *hw);
4302 * ieee80211_restart_hw - restart hardware completely
4304 * Call this function when the hardware was restarted for some reason
4305 * (hardware error, ...) and the driver is unable to restore its state
4306 * by itself. mac80211 assumes that at this point the driver/hardware
4307 * is completely uninitialised and stopped, it starts the process by
4308 * calling the ->start() operation. The driver will need to reset all
4309 * internal state that it has prior to calling this function.
4311 * @hw: the hardware to restart
4313 void ieee80211_restart_hw(struct ieee80211_hw *hw);
4316 * ieee80211_rx_napi - receive frame from NAPI context
4318 * Use this function to hand received frames to mac80211. The receive
4319 * buffer in @skb must start with an IEEE 802.11 header. In case of a
4320 * paged @skb is used, the driver is recommended to put the ieee80211
4321 * header of the frame on the linear part of the @skb to avoid memory
4322 * allocation and/or memcpy by the stack.
4324 * This function may not be called in IRQ context. Calls to this function
4325 * for a single hardware must be synchronized against each other. Calls to
4326 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be
4327 * mixed for a single hardware. Must not run concurrently with
4328 * ieee80211_tx_status() or ieee80211_tx_status_ni().
4330 * This function must be called with BHs disabled.
4332 * @hw: the hardware this frame came in on
4333 * @sta: the station the frame was received from, or %NULL
4334 * @skb: the buffer to receive, owned by mac80211 after this call
4335 * @napi: the NAPI context
4337 void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
4338 struct sk_buff *skb, struct napi_struct *napi);
4341 * ieee80211_rx - receive frame
4343 * Use this function to hand received frames to mac80211. The receive
4344 * buffer in @skb must start with an IEEE 802.11 header. In case of a
4345 * paged @skb is used, the driver is recommended to put the ieee80211
4346 * header of the frame on the linear part of the @skb to avoid memory
4347 * allocation and/or memcpy by the stack.
4349 * This function may not be called in IRQ context. Calls to this function
4350 * for a single hardware must be synchronized against each other. Calls to
4351 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be
4352 * mixed for a single hardware. Must not run concurrently with
4353 * ieee80211_tx_status() or ieee80211_tx_status_ni().
4355 * In process context use instead ieee80211_rx_ni().
4357 * @hw: the hardware this frame came in on
4358 * @skb: the buffer to receive, owned by mac80211 after this call
4360 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
4362 ieee80211_rx_napi(hw, NULL, skb, NULL);
4366 * ieee80211_rx_irqsafe - receive frame
4368 * Like ieee80211_rx() but can be called in IRQ context
4369 * (internally defers to a tasklet.)
4371 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not
4372 * be mixed for a single hardware.Must not run concurrently with
4373 * ieee80211_tx_status() or ieee80211_tx_status_ni().
4375 * @hw: the hardware this frame came in on
4376 * @skb: the buffer to receive, owned by mac80211 after this call
4378 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb);
4381 * ieee80211_rx_ni - receive frame (in process context)
4383 * Like ieee80211_rx() but can be called in process context
4384 * (internally disables bottom halves).
4386 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may
4387 * not be mixed for a single hardware. Must not run concurrently with
4388 * ieee80211_tx_status() or ieee80211_tx_status_ni().
4390 * @hw: the hardware this frame came in on
4391 * @skb: the buffer to receive, owned by mac80211 after this call
4393 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw,
4394 struct sk_buff *skb)
4397 ieee80211_rx(hw, skb);
4402 * ieee80211_sta_ps_transition - PS transition for connected sta
4404 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS
4405 * flag set, use this function to inform mac80211 about a connected station
4406 * entering/leaving PS mode.
4408 * This function may not be called in IRQ context or with softirqs enabled.
4410 * Calls to this function for a single hardware must be synchronized against
4413 * @sta: currently connected sta
4414 * @start: start or stop PS
4416 * Return: 0 on success. -EINVAL when the requested PS mode is already set.
4418 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start);
4421 * ieee80211_sta_ps_transition_ni - PS transition for connected sta
4422 * (in process context)
4424 * Like ieee80211_sta_ps_transition() but can be called in process context
4425 * (internally disables bottom halves). Concurrent call restriction still
4428 * @sta: currently connected sta
4429 * @start: start or stop PS
4431 * Return: Like ieee80211_sta_ps_transition().
4433 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta,
4439 ret = ieee80211_sta_ps_transition(sta, start);
4446 * ieee80211_sta_pspoll - PS-Poll frame received
4447 * @sta: currently connected station
4449 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set,
4450 * use this function to inform mac80211 that a PS-Poll frame from a
4451 * connected station was received.
4452 * This must be used in conjunction with ieee80211_sta_ps_transition()
4453 * and possibly ieee80211_sta_uapsd_trigger(); calls to all three must
4456 void ieee80211_sta_pspoll(struct ieee80211_sta *sta);
4459 * ieee80211_sta_uapsd_trigger - (potential) U-APSD trigger frame received
4460 * @sta: currently connected station
4461 * @tid: TID of the received (potential) trigger frame
4463 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS flag set,
4464 * use this function to inform mac80211 that a (potential) trigger frame
4465 * from a connected station was received.
4466 * This must be used in conjunction with ieee80211_sta_ps_transition()
4467 * and possibly ieee80211_sta_pspoll(); calls to all three must be
4469 * %IEEE80211_NUM_TIDS can be passed as the tid if the tid is unknown.
4470 * In this case, mac80211 will not check that this tid maps to an AC
4471 * that is trigger enabled and assume that the caller did the proper
4474 void ieee80211_sta_uapsd_trigger(struct ieee80211_sta *sta, u8 tid);
4477 * The TX headroom reserved by mac80211 for its own tx_status functions.
4478 * This is enough for the radiotap header.
4480 #define IEEE80211_TX_STATUS_HEADROOM ALIGN(14, 4)
4483 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames
4484 * @sta: &struct ieee80211_sta pointer for the sleeping station
4485 * @tid: the TID that has buffered frames
4486 * @buffered: indicates whether or not frames are buffered for this TID
4488 * If a driver buffers frames for a powersave station instead of passing
4489 * them back to mac80211 for retransmission, the station may still need
4490 * to be told that there are buffered frames via the TIM bit.
4492 * This function informs mac80211 whether or not there are frames that are
4493 * buffered in the driver for a given TID; mac80211 can then use this data
4494 * to set the TIM bit (NOTE: This may call back into the driver's set_tim
4495 * call! Beware of the locking!)
4497 * If all frames are released to the station (due to PS-poll or uAPSD)
4498 * then the driver needs to inform mac80211 that there no longer are
4499 * frames buffered. However, when the station wakes up mac80211 assumes
4500 * that all buffered frames will be transmitted and clears this data,
4501 * drivers need to make sure they inform mac80211 about all buffered
4502 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP).
4504 * Note that technically mac80211 only needs to know this per AC, not per
4505 * TID, but since driver buffering will inevitably happen per TID (since
4506 * it is related to aggregation) it is easier to make mac80211 map the
4507 * TID to the AC as required instead of keeping track in all drivers that
4510 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta,
4511 u8 tid, bool buffered);
4514 * ieee80211_get_tx_rates - get the selected transmit rates for a packet
4516 * Call this function in a driver with per-packet rate selection support
4517 * to combine the rate info in the packet tx info with the most recent
4518 * rate selection table for the station entry.
4520 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4521 * @sta: the receiver station to which this packet is sent.
4522 * @skb: the frame to be transmitted.
4523 * @dest: buffer for extracted rate/retry information
4524 * @max_rates: maximum number of rates to fetch
4526 void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
4527 struct ieee80211_sta *sta,
4528 struct sk_buff *skb,
4529 struct ieee80211_tx_rate *dest,
4533 * ieee80211_sta_set_expected_throughput - set the expected tpt for a station
4535 * Call this function to notify mac80211 about a change in expected throughput
4536 * to a station. A driver for a device that does rate control in firmware can
4537 * call this function when the expected throughput estimate towards a station
4538 * changes. The information is used to tune the CoDel AQM applied to traffic
4539 * going towards that station (which can otherwise be too aggressive and cause
4540 * slow stations to starve).
4542 * @pubsta: the station to set throughput for.
4543 * @thr: the current expected throughput in kbps.
4545 void ieee80211_sta_set_expected_throughput(struct ieee80211_sta *pubsta,
4549 * ieee80211_tx_rate_update - transmit rate update callback
4551 * Drivers should call this functions with a non-NULL pub sta
4552 * This function can be used in drivers that does not have provision
4553 * in updating the tx rate in data path.
4555 * @hw: the hardware the frame was transmitted by
4556 * @pubsta: the station to update the tx rate for.
4557 * @info: tx status information
4559 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
4560 struct ieee80211_sta *pubsta,
4561 struct ieee80211_tx_info *info);
4564 * ieee80211_tx_status - transmit status callback
4566 * Call this function for all transmitted frames after they have been
4567 * transmitted. It is permissible to not call this function for
4568 * multicast frames but this can affect statistics.
4570 * This function may not be called in IRQ context. Calls to this function
4571 * for a single hardware must be synchronized against each other. Calls
4572 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe()
4573 * may not be mixed for a single hardware. Must not run concurrently with
4574 * ieee80211_rx() or ieee80211_rx_ni().
4576 * @hw: the hardware the frame was transmitted by
4577 * @skb: the frame that was transmitted, owned by mac80211 after this call
4579 void ieee80211_tx_status(struct ieee80211_hw *hw,
4580 struct sk_buff *skb);
4583 * ieee80211_tx_status_ext - extended transmit status callback
4585 * This function can be used as a replacement for ieee80211_tx_status
4586 * in drivers that may want to provide extra information that does not
4587 * fit into &struct ieee80211_tx_info.
4589 * Calls to this function for a single hardware must be synchronized
4590 * against each other. Calls to this function, ieee80211_tx_status_ni()
4591 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware.
4593 * @hw: the hardware the frame was transmitted by
4594 * @status: tx status information
4596 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
4597 struct ieee80211_tx_status *status);
4600 * ieee80211_tx_status_noskb - transmit status callback without skb
4602 * This function can be used as a replacement for ieee80211_tx_status
4603 * in drivers that cannot reliably map tx status information back to
4606 * Calls to this function for a single hardware must be synchronized
4607 * against each other. Calls to this function, ieee80211_tx_status_ni()
4608 * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware.
4610 * @hw: the hardware the frame was transmitted by
4611 * @sta: the receiver station to which this packet is sent
4612 * (NULL for multicast packets)
4613 * @info: tx status information
4615 static inline void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
4616 struct ieee80211_sta *sta,
4617 struct ieee80211_tx_info *info)
4619 struct ieee80211_tx_status status = {
4624 ieee80211_tx_status_ext(hw, &status);
4628 * ieee80211_tx_status_ni - transmit status callback (in process context)
4630 * Like ieee80211_tx_status() but can be called in process context.
4632 * Calls to this function, ieee80211_tx_status() and
4633 * ieee80211_tx_status_irqsafe() may not be mixed
4634 * for a single hardware.
4636 * @hw: the hardware the frame was transmitted by
4637 * @skb: the frame that was transmitted, owned by mac80211 after this call
4639 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw,
4640 struct sk_buff *skb)
4643 ieee80211_tx_status(hw, skb);
4648 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback
4650 * Like ieee80211_tx_status() but can be called in IRQ context
4651 * (internally defers to a tasklet.)
4653 * Calls to this function, ieee80211_tx_status() and
4654 * ieee80211_tx_status_ni() may not be mixed for a single hardware.
4656 * @hw: the hardware the frame was transmitted by
4657 * @skb: the frame that was transmitted, owned by mac80211 after this call
4659 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
4660 struct sk_buff *skb);
4663 * ieee80211_report_low_ack - report non-responding station
4665 * When operating in AP-mode, call this function to report a non-responding
4668 * @sta: the non-responding connected sta
4669 * @num_packets: number of packets sent to @sta without a response
4671 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets);
4673 #define IEEE80211_MAX_CSA_COUNTERS_NUM 2
4676 * struct ieee80211_mutable_offsets - mutable beacon offsets
4677 * @tim_offset: position of TIM element
4678 * @tim_length: size of TIM element
4679 * @csa_counter_offs: array of IEEE80211_MAX_CSA_COUNTERS_NUM offsets
4680 * to CSA counters. This array can contain zero values which
4681 * should be ignored.
4683 struct ieee80211_mutable_offsets {
4687 u16 csa_counter_offs[IEEE80211_MAX_CSA_COUNTERS_NUM];
4691 * ieee80211_beacon_get_template - beacon template generation function
4692 * @hw: pointer obtained from ieee80211_alloc_hw().
4693 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4694 * @offs: &struct ieee80211_mutable_offsets pointer to struct that will
4695 * receive the offsets that may be updated by the driver.
4697 * If the driver implements beaconing modes, it must use this function to
4698 * obtain the beacon template.
4700 * This function should be used if the beacon frames are generated by the
4701 * device, and then the driver must use the returned beacon as the template
4702 * The driver or the device are responsible to update the DTIM and, when
4703 * applicable, the CSA count.
4705 * The driver is responsible for freeing the returned skb.
4707 * Return: The beacon template. %NULL on error.
4710 ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4711 struct ieee80211_vif *vif,
4712 struct ieee80211_mutable_offsets *offs);
4715 * ieee80211_beacon_get_tim - beacon generation function
4716 * @hw: pointer obtained from ieee80211_alloc_hw().
4717 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4718 * @tim_offset: pointer to variable that will receive the TIM IE offset.
4719 * Set to 0 if invalid (in non-AP modes).
4720 * @tim_length: pointer to variable that will receive the TIM IE length,
4721 * (including the ID and length bytes!).
4722 * Set to 0 if invalid (in non-AP modes).
4724 * If the driver implements beaconing modes, it must use this function to
4725 * obtain the beacon frame.
4727 * If the beacon frames are generated by the host system (i.e., not in
4728 * hardware/firmware), the driver uses this function to get each beacon
4729 * frame from mac80211 -- it is responsible for calling this function exactly
4730 * once before the beacon is needed (e.g. based on hardware interrupt).
4732 * The driver is responsible for freeing the returned skb.
4734 * Return: The beacon template. %NULL on error.
4736 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4737 struct ieee80211_vif *vif,
4738 u16 *tim_offset, u16 *tim_length);
4741 * ieee80211_beacon_get - beacon generation function
4742 * @hw: pointer obtained from ieee80211_alloc_hw().
4743 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4745 * See ieee80211_beacon_get_tim().
4747 * Return: See ieee80211_beacon_get_tim().
4749 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
4750 struct ieee80211_vif *vif)
4752 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL);
4756 * ieee80211_csa_update_counter - request mac80211 to decrement the csa counter
4757 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4759 * The csa counter should be updated after each beacon transmission.
4760 * This function is called implicitly when
4761 * ieee80211_beacon_get/ieee80211_beacon_get_tim are called, however if the
4762 * beacon frames are generated by the device, the driver should call this
4763 * function after each beacon transmission to sync mac80211's csa counters.
4765 * Return: new csa counter value
4767 u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif);
4770 * ieee80211_csa_set_counter - request mac80211 to set csa counter
4771 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4772 * @counter: the new value for the counter
4774 * The csa counter can be changed by the device, this API should be
4775 * used by the device driver to update csa counter in mac80211.
4777 * It should never be used together with ieee80211_csa_update_counter(),
4778 * as it will cause a race condition around the counter value.
4780 void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter);
4783 * ieee80211_csa_finish - notify mac80211 about channel switch
4784 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4786 * After a channel switch announcement was scheduled and the counter in this
4787 * announcement hits 1, this function must be called by the driver to
4788 * notify mac80211 that the channel can be changed.
4790 void ieee80211_csa_finish(struct ieee80211_vif *vif);
4793 * ieee80211_csa_is_complete - find out if counters reached 1
4794 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4796 * This function returns whether the channel switch counters reached zero.
4798 bool ieee80211_csa_is_complete(struct ieee80211_vif *vif);
4802 * ieee80211_proberesp_get - retrieve a Probe Response template
4803 * @hw: pointer obtained from ieee80211_alloc_hw().
4804 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4806 * Creates a Probe Response template which can, for example, be uploaded to
4807 * hardware. The destination address should be set by the caller.
4809 * Can only be called in AP mode.
4811 * Return: The Probe Response template. %NULL on error.
4813 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4814 struct ieee80211_vif *vif);
4817 * ieee80211_pspoll_get - retrieve a PS Poll template
4818 * @hw: pointer obtained from ieee80211_alloc_hw().
4819 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4821 * Creates a PS Poll a template which can, for example, uploaded to
4822 * hardware. The template must be updated after association so that correct
4823 * AID, BSSID and MAC address is used.
4825 * Note: Caller (or hardware) is responsible for setting the
4826 * &IEEE80211_FCTL_PM bit.
4828 * Return: The PS Poll template. %NULL on error.
4830 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4831 struct ieee80211_vif *vif);
4834 * ieee80211_nullfunc_get - retrieve a nullfunc template
4835 * @hw: pointer obtained from ieee80211_alloc_hw().
4836 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4837 * @qos_ok: QoS NDP is acceptable to the caller, this should be set
4838 * if at all possible
4840 * Creates a Nullfunc template which can, for example, uploaded to
4841 * hardware. The template must be updated after association so that correct
4842 * BSSID and address is used.
4844 * If @qos_ndp is set and the association is to an AP with QoS/WMM, the
4845 * returned packet will be QoS NDP.
4847 * Note: Caller (or hardware) is responsible for setting the
4848 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields.
4850 * Return: The nullfunc template. %NULL on error.
4852 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4853 struct ieee80211_vif *vif,
4857 * ieee80211_probereq_get - retrieve a Probe Request template
4858 * @hw: pointer obtained from ieee80211_alloc_hw().
4859 * @src_addr: source MAC address
4860 * @ssid: SSID buffer
4861 * @ssid_len: length of SSID
4862 * @tailroom: tailroom to reserve at end of SKB for IEs
4864 * Creates a Probe Request template which can, for example, be uploaded to
4867 * Return: The Probe Request template. %NULL on error.
4869 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
4871 const u8 *ssid, size_t ssid_len,
4875 * ieee80211_rts_get - RTS frame generation function
4876 * @hw: pointer obtained from ieee80211_alloc_hw().
4877 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4878 * @frame: pointer to the frame that is going to be protected by the RTS.
4879 * @frame_len: the frame length (in octets).
4880 * @frame_txctl: &struct ieee80211_tx_info of the frame.
4881 * @rts: The buffer where to store the RTS frame.
4883 * If the RTS frames are generated by the host system (i.e., not in
4884 * hardware/firmware), the low-level driver uses this function to receive
4885 * the next RTS frame from the 802.11 code. The low-level is responsible
4886 * for calling this function before and RTS frame is needed.
4888 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4889 const void *frame, size_t frame_len,
4890 const struct ieee80211_tx_info *frame_txctl,
4891 struct ieee80211_rts *rts);
4894 * ieee80211_rts_duration - Get the duration field for an RTS frame
4895 * @hw: pointer obtained from ieee80211_alloc_hw().
4896 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4897 * @frame_len: the length of the frame that is going to be protected by the RTS.
4898 * @frame_txctl: &struct ieee80211_tx_info of the frame.
4900 * If the RTS is generated in firmware, but the host system must provide
4901 * the duration field, the low-level driver uses this function to receive
4902 * the duration field value in little-endian byteorder.
4904 * Return: The duration.
4906 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
4907 struct ieee80211_vif *vif, size_t frame_len,
4908 const struct ieee80211_tx_info *frame_txctl);
4911 * ieee80211_ctstoself_get - CTS-to-self frame generation function
4912 * @hw: pointer obtained from ieee80211_alloc_hw().
4913 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4914 * @frame: pointer to the frame that is going to be protected by the CTS-to-self.
4915 * @frame_len: the frame length (in octets).
4916 * @frame_txctl: &struct ieee80211_tx_info of the frame.
4917 * @cts: The buffer where to store the CTS-to-self frame.
4919 * If the CTS-to-self frames are generated by the host system (i.e., not in
4920 * hardware/firmware), the low-level driver uses this function to receive
4921 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible
4922 * for calling this function before and CTS-to-self frame is needed.
4924 void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
4925 struct ieee80211_vif *vif,
4926 const void *frame, size_t frame_len,
4927 const struct ieee80211_tx_info *frame_txctl,
4928 struct ieee80211_cts *cts);
4931 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
4932 * @hw: pointer obtained from ieee80211_alloc_hw().
4933 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4934 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
4935 * @frame_txctl: &struct ieee80211_tx_info of the frame.
4937 * If the CTS-to-self is generated in firmware, but the host system must provide
4938 * the duration field, the low-level driver uses this function to receive
4939 * the duration field value in little-endian byteorder.
4941 * Return: The duration.
4943 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
4944 struct ieee80211_vif *vif,
4946 const struct ieee80211_tx_info *frame_txctl);
4949 * ieee80211_generic_frame_duration - Calculate the duration field for a frame
4950 * @hw: pointer obtained from ieee80211_alloc_hw().
4951 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4952 * @band: the band to calculate the frame duration on
4953 * @frame_len: the length of the frame.
4954 * @rate: the rate at which the frame is going to be transmitted.
4956 * Calculate the duration field of some generic frame, given its
4957 * length and transmission rate (in 100kbps).
4959 * Return: The duration.
4961 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
4962 struct ieee80211_vif *vif,
4963 enum nl80211_band band,
4965 struct ieee80211_rate *rate);
4968 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
4969 * @hw: pointer as obtained from ieee80211_alloc_hw().
4970 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
4972 * Function for accessing buffered broadcast and multicast frames. If
4973 * hardware/firmware does not implement buffering of broadcast/multicast
4974 * frames when power saving is used, 802.11 code buffers them in the host
4975 * memory. The low-level driver uses this function to fetch next buffered
4976 * frame. In most cases, this is used when generating beacon frame.
4978 * Return: A pointer to the next buffered skb or NULL if no more buffered
4979 * frames are available.
4981 * Note: buffered frames are returned only after DTIM beacon frame was
4982 * generated with ieee80211_beacon_get() and the low-level driver must thus
4983 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
4984 * NULL if the previous generated beacon was not DTIM, so the low-level driver
4985 * does not need to check for DTIM beacons separately and should be able to
4986 * use common code for all beacons.
4989 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
4992 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32
4994 * This function returns the TKIP phase 1 key for the given IV32.
4996 * @keyconf: the parameter passed with the set key
4997 * @iv32: IV32 to get the P1K for
4998 * @p1k: a buffer to which the key will be written, as 5 u16 values
5000 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf,
5001 u32 iv32, u16 *p1k);
5004 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key
5006 * This function returns the TKIP phase 1 key for the IV32 taken
5007 * from the given packet.
5009 * @keyconf: the parameter passed with the set key
5010 * @skb: the packet to take the IV32 value from that will be encrypted
5012 * @p1k: a buffer to which the key will be written, as 5 u16 values
5014 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf,
5015 struct sk_buff *skb, u16 *p1k)
5017 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
5018 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control);
5019 u32 iv32 = get_unaligned_le32(&data[4]);
5021 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k);
5025 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX
5027 * This function returns the TKIP phase 1 key for the given IV32
5028 * and transmitter address.
5030 * @keyconf: the parameter passed with the set key
5031 * @ta: TA that will be used with the key
5032 * @iv32: IV32 to get the P1K for
5033 * @p1k: a buffer to which the key will be written, as 5 u16 values
5035 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf,
5036 const u8 *ta, u32 iv32, u16 *p1k);
5039 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key
5041 * This function computes the TKIP RC4 key for the IV values
5044 * @keyconf: the parameter passed with the set key
5045 * @skb: the packet to take the IV32/IV16 values from that will be
5046 * encrypted with this key
5047 * @p2k: a buffer to which the key will be written, 16 bytes
5049 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf,
5050 struct sk_buff *skb, u8 *p2k);
5053 * ieee80211_tkip_add_iv - write TKIP IV and Ext. IV to pos
5055 * @pos: start of crypto header
5056 * @keyconf: the parameter passed with the set key
5059 * Returns: pointer to the octet following IVs (i.e. beginning of
5060 * the packet payload)
5062 * This function writes the tkip IV value to pos (which should
5063 * point to the crypto header)
5065 u8 *ieee80211_tkip_add_iv(u8 *pos, struct ieee80211_key_conf *keyconf, u64 pn);
5068 * ieee80211_get_key_rx_seq - get key RX sequence counter
5070 * @keyconf: the parameter passed with the set key
5071 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only);
5072 * the value on TID 0 is also used for non-QoS frames. For
5073 * CMAC, only TID 0 is valid.
5074 * @seq: buffer to receive the sequence data
5076 * This function allows a driver to retrieve the current RX IV/PNs
5077 * for the given key. It must not be called if IV checking is done
5078 * by the device and not by mac80211.
5080 * Note that this function may only be called when no RX processing
5081 * can be done concurrently.
5083 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf,
5084 int tid, struct ieee80211_key_seq *seq);
5087 * ieee80211_set_key_rx_seq - set key RX sequence counter
5089 * @keyconf: the parameter passed with the set key
5090 * @tid: The TID, or -1 for the management frame value (CCMP/GCMP only);
5091 * the value on TID 0 is also used for non-QoS frames. For
5092 * CMAC, only TID 0 is valid.
5093 * @seq: new sequence data
5095 * This function allows a driver to set the current RX IV/PNs for the
5096 * given key. This is useful when resuming from WoWLAN sleep and GTK
5097 * rekey may have been done while suspended. It should not be called
5098 * if IV checking is done by the device and not by mac80211.
5100 * Note that this function may only be called when no RX processing
5101 * can be done concurrently.
5103 void ieee80211_set_key_rx_seq(struct ieee80211_key_conf *keyconf,
5104 int tid, struct ieee80211_key_seq *seq);
5107 * ieee80211_remove_key - remove the given key
5108 * @keyconf: the parameter passed with the set key
5110 * Remove the given key. If the key was uploaded to the hardware at the
5111 * time this function is called, it is not deleted in the hardware but
5112 * instead assumed to have been removed already.
5114 * Note that due to locking considerations this function can (currently)
5115 * only be called during key iteration (ieee80211_iter_keys().)
5117 void ieee80211_remove_key(struct ieee80211_key_conf *keyconf);
5120 * ieee80211_gtk_rekey_add - add a GTK key from rekeying during WoWLAN
5121 * @vif: the virtual interface to add the key on
5122 * @keyconf: new key data
5124 * When GTK rekeying was done while the system was suspended, (a) new
5125 * key(s) will be available. These will be needed by mac80211 for proper
5126 * RX processing, so this function allows setting them.
5128 * The function returns the newly allocated key structure, which will
5129 * have similar contents to the passed key configuration but point to
5130 * mac80211-owned memory. In case of errors, the function returns an
5131 * ERR_PTR(), use IS_ERR() etc.
5133 * Note that this function assumes the key isn't added to hardware
5134 * acceleration, so no TX will be done with the key. Since it's a GTK
5135 * on managed (station) networks, this is true anyway. If the driver
5136 * calls this function from the resume callback and subsequently uses
5137 * the return code 1 to reconfigure the device, this key will be part
5138 * of the reconfiguration.
5140 * Note that the driver should also call ieee80211_set_key_rx_seq()
5141 * for the new key for each TID to set up sequence counters properly.
5143 * IMPORTANT: If this replaces a key that is present in the hardware,
5144 * then it will attempt to remove it during this call. In many cases
5145 * this isn't what you want, so call ieee80211_remove_key() first for
5146 * the key that's being replaced.
5148 struct ieee80211_key_conf *
5149 ieee80211_gtk_rekey_add(struct ieee80211_vif *vif,
5150 struct ieee80211_key_conf *keyconf);
5153 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying
5154 * @vif: virtual interface the rekeying was done on
5155 * @bssid: The BSSID of the AP, for checking association
5156 * @replay_ctr: the new replay counter after GTK rekeying
5157 * @gfp: allocation flags
5159 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
5160 const u8 *replay_ctr, gfp_t gfp);
5163 * ieee80211_wake_queue - wake specific queue
5164 * @hw: pointer as obtained from ieee80211_alloc_hw().
5165 * @queue: queue number (counted from zero).
5167 * Drivers should use this function instead of netif_wake_queue.
5169 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
5172 * ieee80211_stop_queue - stop specific queue
5173 * @hw: pointer as obtained from ieee80211_alloc_hw().
5174 * @queue: queue number (counted from zero).
5176 * Drivers should use this function instead of netif_stop_queue.
5178 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
5181 * ieee80211_queue_stopped - test status of the queue
5182 * @hw: pointer as obtained from ieee80211_alloc_hw().
5183 * @queue: queue number (counted from zero).
5185 * Drivers should use this function instead of netif_stop_queue.
5187 * Return: %true if the queue is stopped. %false otherwise.
5190 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue);
5193 * ieee80211_stop_queues - stop all queues
5194 * @hw: pointer as obtained from ieee80211_alloc_hw().
5196 * Drivers should use this function instead of netif_stop_queue.
5198 void ieee80211_stop_queues(struct ieee80211_hw *hw);
5201 * ieee80211_wake_queues - wake all queues
5202 * @hw: pointer as obtained from ieee80211_alloc_hw().
5204 * Drivers should use this function instead of netif_wake_queue.
5206 void ieee80211_wake_queues(struct ieee80211_hw *hw);
5209 * ieee80211_scan_completed - completed hardware scan
5211 * When hardware scan offload is used (i.e. the hw_scan() callback is
5212 * assigned) this function needs to be called by the driver to notify
5213 * mac80211 that the scan finished. This function can be called from
5214 * any context, including hardirq context.
5216 * @hw: the hardware that finished the scan
5217 * @info: information about the completed scan
5219 void ieee80211_scan_completed(struct ieee80211_hw *hw,
5220 struct cfg80211_scan_info *info);
5223 * ieee80211_sched_scan_results - got results from scheduled scan
5225 * When a scheduled scan is running, this function needs to be called by the
5226 * driver whenever there are new scan results available.
5228 * @hw: the hardware that is performing scheduled scans
5230 void ieee80211_sched_scan_results(struct ieee80211_hw *hw);
5233 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped
5235 * When a scheduled scan is running, this function can be called by
5236 * the driver if it needs to stop the scan to perform another task.
5237 * Usual scenarios are drivers that cannot continue the scheduled scan
5238 * while associating, for instance.
5240 * @hw: the hardware that is performing scheduled scans
5242 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw);
5245 * enum ieee80211_interface_iteration_flags - interface iteration flags
5246 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have
5247 * been added to the driver; However, note that during hardware
5248 * reconfiguration (after restart_hw) it will iterate over a new
5249 * interface and over all the existing interfaces even if they
5250 * haven't been re-added to the driver yet.
5251 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all
5252 * interfaces, even if they haven't been re-added to the driver yet.
5253 * @IEEE80211_IFACE_ITER_ACTIVE: Iterate only active interfaces (netdev is up).
5255 enum ieee80211_interface_iteration_flags {
5256 IEEE80211_IFACE_ITER_NORMAL = 0,
5257 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0),
5258 IEEE80211_IFACE_ITER_ACTIVE = BIT(1),
5262 * ieee80211_iterate_interfaces - iterate interfaces
5264 * This function iterates over the interfaces associated with a given
5265 * hardware and calls the callback for them. This includes active as well as
5266 * inactive interfaces. This function allows the iterator function to sleep.
5267 * Will iterate over a new interface during add_interface().
5269 * @hw: the hardware struct of which the interfaces should be iterated over
5270 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags
5271 * @iterator: the iterator function to call
5272 * @data: first argument of the iterator function
5274 void ieee80211_iterate_interfaces(struct ieee80211_hw *hw, u32 iter_flags,
5275 void (*iterator)(void *data, u8 *mac,
5276 struct ieee80211_vif *vif),
5280 * ieee80211_iterate_active_interfaces - iterate active interfaces
5282 * This function iterates over the interfaces associated with a given
5283 * hardware that are currently active and calls the callback for them.
5284 * This function allows the iterator function to sleep, when the iterator
5285 * function is atomic @ieee80211_iterate_active_interfaces_atomic can
5287 * Does not iterate over a new interface during add_interface().
5289 * @hw: the hardware struct of which the interfaces should be iterated over
5290 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags
5291 * @iterator: the iterator function to call
5292 * @data: first argument of the iterator function
5295 ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, u32 iter_flags,
5296 void (*iterator)(void *data, u8 *mac,
5297 struct ieee80211_vif *vif),
5300 ieee80211_iterate_interfaces(hw,
5301 iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
5306 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces
5308 * This function iterates over the interfaces associated with a given
5309 * hardware that are currently active and calls the callback for them.
5310 * This function requires the iterator callback function to be atomic,
5311 * if that is not desired, use @ieee80211_iterate_active_interfaces instead.
5312 * Does not iterate over a new interface during add_interface().
5314 * @hw: the hardware struct of which the interfaces should be iterated over
5315 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags
5316 * @iterator: the iterator function to call, cannot sleep
5317 * @data: first argument of the iterator function
5319 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw,
5321 void (*iterator)(void *data,
5323 struct ieee80211_vif *vif),
5327 * ieee80211_iterate_active_interfaces_rtnl - iterate active interfaces
5329 * This function iterates over the interfaces associated with a given
5330 * hardware that are currently active and calls the callback for them.
5331 * This version can only be used while holding the RTNL.
5333 * @hw: the hardware struct of which the interfaces should be iterated over
5334 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags
5335 * @iterator: the iterator function to call, cannot sleep
5336 * @data: first argument of the iterator function
5338 void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw,
5340 void (*iterator)(void *data,
5342 struct ieee80211_vif *vif),
5346 * ieee80211_iterate_stations_atomic - iterate stations
5348 * This function iterates over all stations associated with a given
5349 * hardware that are currently uploaded to the driver and calls the callback
5350 * function for them.
5351 * This function requires the iterator callback function to be atomic,
5353 * @hw: the hardware struct of which the interfaces should be iterated over
5354 * @iterator: the iterator function to call, cannot sleep
5355 * @data: first argument of the iterator function
5357 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
5358 void (*iterator)(void *data,
5359 struct ieee80211_sta *sta),
5362 * ieee80211_queue_work - add work onto the mac80211 workqueue
5364 * Drivers and mac80211 use this to add work onto the mac80211 workqueue.
5365 * This helper ensures drivers are not queueing work when they should not be.
5367 * @hw: the hardware struct for the interface we are adding work for
5368 * @work: the work we want to add onto the mac80211 workqueue
5370 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work);
5373 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue
5375 * Drivers and mac80211 use this to queue delayed work onto the mac80211
5378 * @hw: the hardware struct for the interface we are adding work for
5379 * @dwork: delayable work to queue onto the mac80211 workqueue
5380 * @delay: number of jiffies to wait before queueing
5382 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
5383 struct delayed_work *dwork,
5384 unsigned long delay);
5387 * ieee80211_start_tx_ba_session - Start a tx Block Ack session.
5388 * @sta: the station for which to start a BA session
5389 * @tid: the TID to BA on.
5390 * @timeout: session timeout value (in TUs)
5392 * Return: success if addBA request was sent, failure otherwise
5394 * Although mac80211/low level driver/user space application can estimate
5395 * the need to start aggregation on a certain RA/TID, the session level
5396 * will be managed by the mac80211.
5398 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid,
5402 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
5403 * @vif: &struct ieee80211_vif pointer from the add_interface callback
5404 * @ra: receiver address of the BA session recipient.
5405 * @tid: the TID to BA on.
5407 * This function must be called by low level driver once it has
5408 * finished with preparations for the BA session. It can be called
5411 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra,
5415 * ieee80211_stop_tx_ba_session - Stop a Block Ack session.
5416 * @sta: the station whose BA session to stop
5417 * @tid: the TID to stop BA.
5419 * Return: negative error if the TID is invalid, or no aggregation active
5421 * Although mac80211/low level driver/user space application can estimate
5422 * the need to stop aggregation on a certain RA/TID, the session level
5423 * will be managed by the mac80211.
5425 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid);
5428 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
5429 * @vif: &struct ieee80211_vif pointer from the add_interface callback
5430 * @ra: receiver address of the BA session recipient.
5431 * @tid: the desired TID to BA on.
5433 * This function must be called by low level driver once it has
5434 * finished with preparations for the BA session tear down. It
5435 * can be called from any context.
5437 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra,
5441 * ieee80211_find_sta - find a station
5443 * @vif: virtual interface to look for station on
5444 * @addr: station's address
5446 * Return: The station, if found. %NULL otherwise.
5448 * Note: This function must be called under RCU lock and the
5449 * resulting pointer is only valid under RCU lock as well.
5451 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
5455 * ieee80211_find_sta_by_ifaddr - find a station on hardware
5457 * @hw: pointer as obtained from ieee80211_alloc_hw()
5458 * @addr: remote station's address
5459 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'.
5461 * Return: The station, if found. %NULL otherwise.
5463 * Note: This function must be called under RCU lock and the
5464 * resulting pointer is only valid under RCU lock as well.
5466 * NOTE: You may pass NULL for localaddr, but then you will just get
5467 * the first STA that matches the remote address 'addr'.
5468 * We can have multiple STA associated with multiple
5469 * logical stations (e.g. consider a station connecting to another
5470 * BSSID on the same AP hardware without disconnecting first).
5471 * In this case, the result of this method with localaddr NULL
5474 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible.
5476 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
5478 const u8 *localaddr);
5481 * ieee80211_sta_block_awake - block station from waking up
5483 * @pubsta: the station
5484 * @block: whether to block or unblock
5486 * Some devices require that all frames that are on the queues
5487 * for a specific station that went to sleep are flushed before
5488 * a poll response or frames after the station woke up can be
5489 * delivered to that it. Note that such frames must be rejected
5490 * by the driver as filtered, with the appropriate status flag.
5492 * This function allows implementing this mode in a race-free
5495 * To do this, a driver must keep track of the number of frames
5496 * still enqueued for a specific station. If this number is not
5497 * zero when the station goes to sleep, the driver must call
5498 * this function to force mac80211 to consider the station to
5499 * be asleep regardless of the station's actual state. Once the
5500 * number of outstanding frames reaches zero, the driver must
5501 * call this function again to unblock the station. That will
5502 * cause mac80211 to be able to send ps-poll responses, and if
5503 * the station queried in the meantime then frames will also
5504 * be sent out as a result of this. Additionally, the driver
5505 * will be notified that the station woke up some time after
5506 * it is unblocked, regardless of whether the station actually
5507 * woke up while blocked or not.
5509 void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
5510 struct ieee80211_sta *pubsta, bool block);
5513 * ieee80211_sta_eosp - notify mac80211 about end of SP
5514 * @pubsta: the station
5516 * When a device transmits frames in a way that it can't tell
5517 * mac80211 in the TX status about the EOSP, it must clear the
5518 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead.
5519 * This applies for PS-Poll as well as uAPSD.
5521 * Note that just like with _tx_status() and _rx() drivers must
5522 * not mix calls to irqsafe/non-irqsafe versions, this function
5523 * must not be mixed with those either. Use the all irqsafe, or
5524 * all non-irqsafe, don't mix!
5526 * NB: the _irqsafe version of this function doesn't exist, no
5527 * driver needs it right now. Don't call this function if
5528 * you'd need the _irqsafe version, look at the git history
5529 * and restore the _irqsafe version!
5531 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta);
5534 * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP
5535 * @pubsta: the station
5536 * @tid: the tid of the NDP
5538 * Sometimes the device understands that it needs to close
5539 * the Service Period unexpectedly. This can happen when
5540 * sending frames that are filling holes in the BA window.
5541 * In this case, the device can ask mac80211 to send a
5542 * Nullfunc frame with EOSP set. When that happens, the
5543 * driver must have called ieee80211_sta_set_buffered() to
5544 * let mac80211 know that there are no buffered frames any
5545 * more, otherwise mac80211 will get the more_data bit wrong.
5546 * The low level driver must have made sure that the frame
5547 * will be sent despite the station being in power-save.
5548 * Mac80211 won't call allow_buffered_frames().
5549 * Note that calling this function, doesn't exempt the driver
5550 * from closing the EOSP properly, it will still have to call
5551 * ieee80211_sta_eosp when the NDP is sent.
5553 void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid);
5556 * ieee80211_sta_register_airtime - register airtime usage for a sta/tid
5558 * Register airtime usage for a given sta on a given tid. The driver can call
5559 * this function to notify mac80211 that a station used a certain amount of
5560 * airtime. This information will be used by the TXQ scheduler to schedule
5561 * stations in a way that ensures airtime fairness.
5563 * The reported airtime should as a minimum include all time that is spent
5564 * transmitting to the remote station, including overhead and padding, but not
5565 * including time spent waiting for a TXOP. If the time is not reported by the
5566 * hardware it can in some cases be calculated from the rate and known frame
5567 * composition. When possible, the time should include any failed transmission
5570 * The driver can either call this function synchronously for every packet or
5571 * aggregate, or asynchronously as airtime usage information becomes available.
5572 * TX and RX airtime can be reported together, or separately by setting one of
5575 * @pubsta: the station
5576 * @tid: the TID to register airtime for
5577 * @tx_airtime: airtime used during TX (in usec)
5578 * @rx_airtime: airtime used during RX (in usec)
5580 void ieee80211_sta_register_airtime(struct ieee80211_sta *pubsta, u8 tid,
5581 u32 tx_airtime, u32 rx_airtime);
5584 * ieee80211_txq_airtime_check - check if a txq can send frame to device
5586 * @hw: pointer obtained from ieee80211_alloc_hw()
5587 * @txq: pointer obtained from station or virtual interface
5589 * Return true if the AQL's airtime limit has not been reached and the txq can
5590 * continue to send more packets to the device. Otherwise return false.
5593 ieee80211_txq_airtime_check(struct ieee80211_hw *hw, struct ieee80211_txq *txq);
5596 * ieee80211_iter_keys - iterate keys programmed into the device
5597 * @hw: pointer obtained from ieee80211_alloc_hw()
5598 * @vif: virtual interface to iterate, may be %NULL for all
5599 * @iter: iterator function that will be called for each key
5600 * @iter_data: custom data to pass to the iterator function
5602 * This function can be used to iterate all the keys known to
5603 * mac80211, even those that weren't previously programmed into
5604 * the device. This is intended for use in WoWLAN if the device
5605 * needs reprogramming of the keys during suspend. Note that due
5606 * to locking reasons, it is also only safe to call this at few
5607 * spots since it must hold the RTNL and be able to sleep.
5609 * The order in which the keys are iterated matches the order
5610 * in which they were originally installed and handed to the
5613 void ieee80211_iter_keys(struct ieee80211_hw *hw,
5614 struct ieee80211_vif *vif,
5615 void (*iter)(struct ieee80211_hw *hw,
5616 struct ieee80211_vif *vif,
5617 struct ieee80211_sta *sta,
5618 struct ieee80211_key_conf *key,
5623 * ieee80211_iter_keys_rcu - iterate keys programmed into the device
5624 * @hw: pointer obtained from ieee80211_alloc_hw()
5625 * @vif: virtual interface to iterate, may be %NULL for all
5626 * @iter: iterator function that will be called for each key
5627 * @iter_data: custom data to pass to the iterator function
5629 * This function can be used to iterate all the keys known to
5630 * mac80211, even those that weren't previously programmed into
5631 * the device. Note that due to locking reasons, keys of station
5632 * in removal process will be skipped.
5634 * This function requires being called in an RCU critical section,
5635 * and thus iter must be atomic.
5637 void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
5638 struct ieee80211_vif *vif,
5639 void (*iter)(struct ieee80211_hw *hw,
5640 struct ieee80211_vif *vif,
5641 struct ieee80211_sta *sta,
5642 struct ieee80211_key_conf *key,
5647 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts
5648 * @hw: pointer obtained from ieee80211_alloc_hw().
5649 * @iter: iterator function
5650 * @iter_data: data passed to iterator function
5652 * Iterate all active channel contexts. This function is atomic and
5653 * doesn't acquire any locks internally that might be held in other
5654 * places while calling into the driver.
5656 * The iterator will not find a context that's being added (during
5657 * the driver callback to add it) but will find it while it's being
5660 * Note that during hardware restart, all contexts that existed
5661 * before the restart are considered already present so will be
5662 * found while iterating, whether they've been re-added already
5665 void ieee80211_iter_chan_contexts_atomic(
5666 struct ieee80211_hw *hw,
5667 void (*iter)(struct ieee80211_hw *hw,
5668 struct ieee80211_chanctx_conf *chanctx_conf,
5673 * ieee80211_ap_probereq_get - retrieve a Probe Request template
5674 * @hw: pointer obtained from ieee80211_alloc_hw().
5675 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5677 * Creates a Probe Request template which can, for example, be uploaded to
5678 * hardware. The template is filled with bssid, ssid and supported rate
5679 * information. This function must only be called from within the
5680 * .bss_info_changed callback function and only in managed mode. The function
5681 * is only useful when the interface is associated, otherwise it will return
5684 * Return: The Probe Request template. %NULL on error.
5686 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
5687 struct ieee80211_vif *vif);
5690 * ieee80211_beacon_loss - inform hardware does not receive beacons
5692 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5694 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and
5695 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the
5696 * hardware is not receiving beacons with this function.
5698 void ieee80211_beacon_loss(struct ieee80211_vif *vif);
5701 * ieee80211_connection_loss - inform hardware has lost connection to the AP
5703 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5705 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and
5706 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver
5707 * needs to inform if the connection to the AP has been lost.
5708 * The function may also be called if the connection needs to be terminated
5709 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set.
5711 * This function will cause immediate change to disassociated state,
5712 * without connection recovery attempts.
5714 void ieee80211_connection_loss(struct ieee80211_vif *vif);
5717 * ieee80211_resume_disconnect - disconnect from AP after resume
5719 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5721 * Instructs mac80211 to disconnect from the AP after resume.
5722 * Drivers can use this after WoWLAN if they know that the
5723 * connection cannot be kept up, for example because keys were
5724 * used while the device was asleep but the replay counters or
5725 * similar cannot be retrieved from the device during resume.
5727 * Note that due to implementation issues, if the driver uses
5728 * the reconfiguration functionality during resume the interface
5729 * will still be added as associated first during resume and then
5730 * disconnect normally later.
5732 * This function can only be called from the resume callback and
5733 * the driver must not be holding any of its own locks while it
5734 * calls this function, or at least not any locks it needs in the
5735 * key configuration paths (if it supports HW crypto).
5737 void ieee80211_resume_disconnect(struct ieee80211_vif *vif);
5740 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring
5741 * rssi threshold triggered
5743 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5744 * @rssi_event: the RSSI trigger event type
5745 * @rssi_level: new RSSI level value or 0 if not available
5746 * @gfp: context flags
5748 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality
5749 * monitoring is configured with an rssi threshold, the driver will inform
5750 * whenever the rssi level reaches the threshold.
5752 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
5753 enum nl80211_cqm_rssi_threshold_event rssi_event,
5758 * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss
5760 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5761 * @gfp: context flags
5763 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp);
5766 * ieee80211_radar_detected - inform that a radar was detected
5768 * @hw: pointer as obtained from ieee80211_alloc_hw()
5770 void ieee80211_radar_detected(struct ieee80211_hw *hw);
5773 * ieee80211_chswitch_done - Complete channel switch process
5774 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5775 * @success: make the channel switch successful or not
5777 * Complete the channel switch post-process: set the new operational channel
5778 * and wake up the suspended queues.
5780 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success);
5783 * ieee80211_request_smps - request SM PS transition
5784 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5785 * @smps_mode: new SM PS mode
5787 * This allows the driver to request an SM PS transition in managed
5788 * mode. This is useful when the driver has more information than
5789 * the stack about possible interference, for example by bluetooth.
5791 void ieee80211_request_smps(struct ieee80211_vif *vif,
5792 enum ieee80211_smps_mode smps_mode);
5795 * ieee80211_ready_on_channel - notification of remain-on-channel start
5796 * @hw: pointer as obtained from ieee80211_alloc_hw()
5798 void ieee80211_ready_on_channel(struct ieee80211_hw *hw);
5801 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired
5802 * @hw: pointer as obtained from ieee80211_alloc_hw()
5804 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw);
5807 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions
5809 * in order not to harm the system performance and user experience, the device
5810 * may request not to allow any rx ba session and tear down existing rx ba
5811 * sessions based on system constraints such as periodic BT activity that needs
5812 * to limit wlan activity (eg.sco or a2dp)."
5813 * in such cases, the intention is to limit the duration of the rx ppdu and
5814 * therefore prevent the peer device to use a-mpdu aggregation.
5816 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5817 * @ba_rx_bitmap: Bit map of open rx ba per tid
5818 * @addr: & to bssid mac address
5820 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap,
5824 * ieee80211_mark_rx_ba_filtered_frames - move RX BA window and mark filtered
5825 * @pubsta: station struct
5826 * @tid: the session's TID
5827 * @ssn: starting sequence number of the bitmap, all frames before this are
5828 * assumed to be out of the window after the call
5829 * @filtered: bitmap of filtered frames, BIT(0) is the @ssn entry etc.
5830 * @received_mpdus: number of received mpdus in firmware
5832 * This function moves the BA window and releases all frames before @ssn, and
5833 * marks frames marked in the bitmap as having been filtered. Afterwards, it
5834 * checks if any frames in the window starting from @ssn can now be released
5835 * (in case they were only waiting for frames that were filtered.)
5837 void ieee80211_mark_rx_ba_filtered_frames(struct ieee80211_sta *pubsta, u8 tid,
5838 u16 ssn, u64 filtered,
5839 u16 received_mpdus);
5842 * ieee80211_send_bar - send a BlockAckReq frame
5844 * can be used to flush pending frames from the peer's aggregation reorder
5847 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
5848 * @ra: the peer's destination address
5849 * @tid: the TID of the aggregation session
5850 * @ssn: the new starting sequence number for the receiver
5852 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn);
5855 * ieee80211_manage_rx_ba_offl - helper to queue an RX BA work
5856 * @vif: &struct ieee80211_vif pointer from the add_interface callback
5857 * @addr: station mac address
5860 void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif, const u8 *addr,
5864 * ieee80211_start_rx_ba_session_offl - start a Rx BA session
5866 * Some device drivers may offload part of the Rx aggregation flow including
5867 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx
5870 * Create structures responsible for reordering so device drivers may call here
5871 * when they complete AddBa negotiation.
5873 * @vif: &struct ieee80211_vif pointer from the add_interface callback
5874 * @addr: station mac address
5877 static inline void ieee80211_start_rx_ba_session_offl(struct ieee80211_vif *vif,
5878 const u8 *addr, u16 tid)
5880 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
5882 ieee80211_manage_rx_ba_offl(vif, addr, tid);
5886 * ieee80211_stop_rx_ba_session_offl - stop a Rx BA session
5888 * Some device drivers may offload part of the Rx aggregation flow including
5889 * AddBa/DelBa negotiation but may otherwise be incapable of full Rx
5892 * Destroy structures responsible for reordering so device drivers may call here
5893 * when they complete DelBa negotiation.
5895 * @vif: &struct ieee80211_vif pointer from the add_interface callback
5896 * @addr: station mac address
5899 static inline void ieee80211_stop_rx_ba_session_offl(struct ieee80211_vif *vif,
5900 const u8 *addr, u16 tid)
5902 if (WARN_ON(tid >= IEEE80211_NUM_TIDS))
5904 ieee80211_manage_rx_ba_offl(vif, addr, tid + IEEE80211_NUM_TIDS);
5908 * ieee80211_rx_ba_timer_expired - stop a Rx BA session due to timeout
5910 * Some device drivers do not offload AddBa/DelBa negotiation, but handle rx
5911 * buffer reording internally, and therefore also handle the session timer.
5913 * Trigger the timeout flow, which sends a DelBa.
5915 * @vif: &struct ieee80211_vif pointer from the add_interface callback
5916 * @addr: station mac address
5919 void ieee80211_rx_ba_timer_expired(struct ieee80211_vif *vif,
5920 const u8 *addr, unsigned int tid);
5922 /* Rate control API */
5925 * struct ieee80211_tx_rate_control - rate control information for/from RC algo
5927 * @hw: The hardware the algorithm is invoked for.
5928 * @sband: The band this frame is being transmitted on.
5929 * @bss_conf: the current BSS configuration
5930 * @skb: the skb that will be transmitted, the control information in it needs
5932 * @reported_rate: The rate control algorithm can fill this in to indicate
5933 * which rate should be reported to userspace as the current rate and
5934 * used for rate calculations in the mesh network.
5935 * @rts: whether RTS will be used for this frame because it is longer than the
5937 * @short_preamble: whether mac80211 will request short-preamble transmission
5938 * if the selected rate supports it
5939 * @rate_idx_mask: user-requested (legacy) rate mask
5940 * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use)
5941 * @bss: whether this frame is sent out in AP or IBSS mode
5943 struct ieee80211_tx_rate_control {
5944 struct ieee80211_hw *hw;
5945 struct ieee80211_supported_band *sband;
5946 struct ieee80211_bss_conf *bss_conf;
5947 struct sk_buff *skb;
5948 struct ieee80211_tx_rate reported_rate;
5949 bool rts, short_preamble;
5951 u8 *rate_idx_mcs_mask;
5956 * enum rate_control_capabilities - rate control capabilities
5958 enum rate_control_capabilities {
5960 * @RATE_CTRL_CAPA_VHT_EXT_NSS_BW:
5961 * Support for extended NSS BW support (dot11VHTExtendedNSSCapable)
5962 * Note that this is only looked at if the minimum number of chains
5963 * that the AP uses is < the number of TX chains the hardware has,
5964 * otherwise the NSS difference doesn't bother us.
5966 RATE_CTRL_CAPA_VHT_EXT_NSS_BW = BIT(0),
5969 struct rate_control_ops {
5972 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir);
5973 void (*free)(void *priv);
5975 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp);
5976 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband,
5977 struct cfg80211_chan_def *chandef,
5978 struct ieee80211_sta *sta, void *priv_sta);
5979 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband,
5980 struct cfg80211_chan_def *chandef,
5981 struct ieee80211_sta *sta, void *priv_sta,
5983 void (*free_sta)(void *priv, struct ieee80211_sta *sta,
5986 void (*tx_status_ext)(void *priv,
5987 struct ieee80211_supported_band *sband,
5988 void *priv_sta, struct ieee80211_tx_status *st);
5989 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
5990 struct ieee80211_sta *sta, void *priv_sta,
5991 struct sk_buff *skb);
5992 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta,
5993 struct ieee80211_tx_rate_control *txrc);
5995 void (*add_sta_debugfs)(void *priv, void *priv_sta,
5996 struct dentry *dir);
5998 u32 (*get_expected_throughput)(void *priv_sta);
6001 static inline int rate_supported(struct ieee80211_sta *sta,
6002 enum nl80211_band band,
6005 return (sta == NULL || sta->supp_rates[band] & BIT(index));
6009 rate_lowest_index(struct ieee80211_supported_band *sband,
6010 struct ieee80211_sta *sta)
6014 for (i = 0; i < sband->n_bitrates; i++)
6015 if (rate_supported(sta, sband->band, i))
6018 /* warn when we cannot find a rate. */
6021 /* and return 0 (the lowest index) */
6026 bool rate_usable_index_exists(struct ieee80211_supported_band *sband,
6027 struct ieee80211_sta *sta)
6031 for (i = 0; i < sband->n_bitrates; i++)
6032 if (rate_supported(sta, sband->band, i))
6038 * rate_control_set_rates - pass the sta rate selection to mac80211/driver
6040 * When not doing a rate control probe to test rates, rate control should pass
6041 * its rate selection to mac80211. If the driver supports receiving a station
6042 * rate table, it will use it to ensure that frames are always sent based on
6043 * the most recent rate control module decision.
6045 * @hw: pointer as obtained from ieee80211_alloc_hw()
6046 * @pubsta: &struct ieee80211_sta pointer to the target destination.
6047 * @rates: new tx rate set to be used for this station.
6049 int rate_control_set_rates(struct ieee80211_hw *hw,
6050 struct ieee80211_sta *pubsta,
6051 struct ieee80211_sta_rates *rates);
6053 int ieee80211_rate_control_register(const struct rate_control_ops *ops);
6054 void ieee80211_rate_control_unregister(const struct rate_control_ops *ops);
6057 conf_is_ht20(struct ieee80211_conf *conf)
6059 return conf->chandef.width == NL80211_CHAN_WIDTH_20;
6063 conf_is_ht40_minus(struct ieee80211_conf *conf)
6065 return conf->chandef.width == NL80211_CHAN_WIDTH_40 &&
6066 conf->chandef.center_freq1 < conf->chandef.chan->center_freq;
6070 conf_is_ht40_plus(struct ieee80211_conf *conf)
6072 return conf->chandef.width == NL80211_CHAN_WIDTH_40 &&
6073 conf->chandef.center_freq1 > conf->chandef.chan->center_freq;
6077 conf_is_ht40(struct ieee80211_conf *conf)
6079 return conf->chandef.width == NL80211_CHAN_WIDTH_40;
6083 conf_is_ht(struct ieee80211_conf *conf)
6085 return (conf->chandef.width != NL80211_CHAN_WIDTH_5) &&
6086 (conf->chandef.width != NL80211_CHAN_WIDTH_10) &&
6087 (conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT);
6090 static inline enum nl80211_iftype
6091 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p)
6095 case NL80211_IFTYPE_STATION:
6096 return NL80211_IFTYPE_P2P_CLIENT;
6097 case NL80211_IFTYPE_AP:
6098 return NL80211_IFTYPE_P2P_GO;
6106 static inline enum nl80211_iftype
6107 ieee80211_vif_type_p2p(struct ieee80211_vif *vif)
6109 return ieee80211_iftype_p2p(vif->type, vif->p2p);
6113 * ieee80211_update_mu_groups - set the VHT MU-MIMO groud data
6115 * @vif: the specified virtual interface
6116 * @membership: 64 bits array - a bit is set if station is member of the group
6117 * @position: 2 bits per group id indicating the position in the group
6119 * Note: This function assumes that the given vif is valid and the position and
6120 * membership data is of the correct size and are in the same byte order as the
6121 * matching GroupId management frame.
6122 * Calls to this function need to be serialized with RX path.
6124 void ieee80211_update_mu_groups(struct ieee80211_vif *vif,
6125 const u8 *membership, const u8 *position);
6127 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
6129 int rssi_max_thold);
6131 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif);
6134 * ieee80211_ave_rssi - report the average RSSI for the specified interface
6136 * @vif: the specified virtual interface
6138 * Note: This function assumes that the given vif is valid.
6140 * Return: The average RSSI value for the requested interface, or 0 if not
6143 int ieee80211_ave_rssi(struct ieee80211_vif *vif);
6146 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup
6147 * @vif: virtual interface
6148 * @wakeup: wakeup reason(s)
6149 * @gfp: allocation flags
6151 * See cfg80211_report_wowlan_wakeup().
6153 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
6154 struct cfg80211_wowlan_wakeup *wakeup,
6158 * ieee80211_tx_prepare_skb - prepare an 802.11 skb for transmission
6159 * @hw: pointer as obtained from ieee80211_alloc_hw()
6160 * @vif: virtual interface
6161 * @skb: frame to be sent from within the driver
6162 * @band: the band to transmit on
6163 * @sta: optional pointer to get the station to send the frame to
6165 * Note: must be called under RCU lock
6167 bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
6168 struct ieee80211_vif *vif, struct sk_buff *skb,
6169 int band, struct ieee80211_sta **sta);
6172 * struct ieee80211_noa_data - holds temporary data for tracking P2P NoA state
6174 * @next_tsf: TSF timestamp of the next absent state change
6175 * @has_next_tsf: next absent state change event pending
6177 * @absent: descriptor bitmask, set if GO is currently absent
6181 * @count: count fields from the NoA descriptors
6182 * @desc: adjusted data from the NoA
6184 struct ieee80211_noa_data {
6190 u8 count[IEEE80211_P2P_NOA_DESC_MAX];
6195 } desc[IEEE80211_P2P_NOA_DESC_MAX];
6199 * ieee80211_parse_p2p_noa - initialize NoA tracking data from P2P IE
6202 * @data: NoA tracking data
6203 * @tsf: current TSF timestamp
6205 * Return: number of successfully parsed descriptors
6207 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
6208 struct ieee80211_noa_data *data, u32 tsf);
6211 * ieee80211_update_p2p_noa - get next pending P2P GO absent state change
6213 * @data: NoA tracking data
6214 * @tsf: current TSF timestamp
6216 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf);
6219 * ieee80211_tdls_oper - request userspace to perform a TDLS operation
6220 * @vif: virtual interface
6221 * @peer: the peer's destination address
6222 * @oper: the requested TDLS operation
6223 * @reason_code: reason code for the operation, valid for TDLS teardown
6224 * @gfp: allocation flags
6226 * See cfg80211_tdls_oper_request().
6228 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
6229 enum nl80211_tdls_operation oper,
6230 u16 reason_code, gfp_t gfp);
6233 * ieee80211_reserve_tid - request to reserve a specific TID
6235 * There is sometimes a need (such as in TDLS) for blocking the driver from
6236 * using a specific TID so that the FW can use it for certain operations such
6237 * as sending PTI requests. To make sure that the driver doesn't use that TID,
6238 * this function must be called as it flushes out packets on this TID and marks
6239 * it as blocked, so that any transmit for the station on this TID will be
6240 * redirected to the alternative TID in the same AC.
6242 * Note that this function blocks and may call back into the driver, so it
6243 * should be called without driver locks held. Also note this function should
6244 * only be called from the driver's @sta_state callback.
6246 * @sta: the station to reserve the TID for
6247 * @tid: the TID to reserve
6249 * Returns: 0 on success, else on failure
6251 int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid);
6254 * ieee80211_unreserve_tid - request to unreserve a specific TID
6256 * Once there is no longer any need for reserving a certain TID, this function
6257 * should be called, and no longer will packets have their TID modified for
6258 * preventing use of this TID in the driver.
6260 * Note that this function blocks and acquires a lock, so it should be called
6261 * without driver locks held. Also note this function should only be called
6262 * from the driver's @sta_state callback.
6265 * @tid: the TID to unreserve
6267 void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
6270 * ieee80211_tx_dequeue - dequeue a packet from a software tx queue
6272 * @hw: pointer as obtained from ieee80211_alloc_hw()
6273 * @txq: pointer obtained from station or virtual interface, or from
6274 * ieee80211_next_txq()
6276 * Returns the skb if successful, %NULL if no frame was available.
6278 * Note that this must be called in an rcu_read_lock() critical section,
6279 * which can only be released after the SKB was handled. Some pointers in
6280 * skb->cb, e.g. the key pointer, are protected by by RCU and thus the
6281 * critical section must persist not just for the duration of this call
6282 * but for the duration of the frame handling.
6283 * However, also note that while in the wake_tx_queue() method,
6284 * rcu_read_lock() is already held.
6286 * softirqs must also be disabled when this function is called.
6287 * In process context, use ieee80211_tx_dequeue_ni() instead.
6289 struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
6290 struct ieee80211_txq *txq);
6293 * ieee80211_tx_dequeue_ni - dequeue a packet from a software tx queue
6294 * (in process context)
6296 * Like ieee80211_tx_dequeue() but can be called in process context
6297 * (internally disables bottom halves).
6299 * @hw: pointer as obtained from ieee80211_alloc_hw()
6300 * @txq: pointer obtained from station or virtual interface, or from
6301 * ieee80211_next_txq()
6303 static inline struct sk_buff *ieee80211_tx_dequeue_ni(struct ieee80211_hw *hw,
6304 struct ieee80211_txq *txq)
6306 struct sk_buff *skb;
6309 skb = ieee80211_tx_dequeue(hw, txq);
6316 * ieee80211_next_txq - get next tx queue to pull packets from
6318 * @hw: pointer as obtained from ieee80211_alloc_hw()
6319 * @ac: AC number to return packets from.
6321 * Returns the next txq if successful, %NULL if no queue is eligible. If a txq
6322 * is returned, it should be returned with ieee80211_return_txq() after the
6323 * driver has finished scheduling it.
6325 struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac);
6328 * ieee80211_txq_schedule_start - start new scheduling round for TXQs
6330 * @hw: pointer as obtained from ieee80211_alloc_hw()
6331 * @ac: AC number to acquire locks for
6333 * Should be called before ieee80211_next_txq() or ieee80211_return_txq().
6334 * The driver must not call multiple TXQ scheduling rounds concurrently.
6336 void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac);
6339 static inline void ieee80211_txq_schedule_end(struct ieee80211_hw *hw, u8 ac)
6343 void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
6344 struct ieee80211_txq *txq, bool force);
6347 * ieee80211_schedule_txq - schedule a TXQ for transmission
6349 * @hw: pointer as obtained from ieee80211_alloc_hw()
6350 * @txq: pointer obtained from station or virtual interface
6352 * Schedules a TXQ for transmission if it is not already scheduled,
6353 * even if mac80211 does not have any packets buffered.
6355 * The driver may call this function if it has buffered packets for
6356 * this TXQ internally.
6359 ieee80211_schedule_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq)
6361 __ieee80211_schedule_txq(hw, txq, true);
6365 * ieee80211_return_txq - return a TXQ previously acquired by ieee80211_next_txq()
6367 * @hw: pointer as obtained from ieee80211_alloc_hw()
6368 * @txq: pointer obtained from station or virtual interface
6369 * @force: schedule txq even if mac80211 does not have any buffered packets.
6371 * The driver may set force=true if it has buffered packets for this TXQ
6375 ieee80211_return_txq(struct ieee80211_hw *hw, struct ieee80211_txq *txq,
6378 __ieee80211_schedule_txq(hw, txq, force);
6382 * ieee80211_txq_may_transmit - check whether TXQ is allowed to transmit
6384 * This function is used to check whether given txq is allowed to transmit by
6385 * the airtime scheduler, and can be used by drivers to access the airtime
6386 * fairness accounting without going using the scheduling order enfored by
6389 * Returns %true if the airtime scheduler thinks the TXQ should be allowed to
6390 * transmit, and %false if it should be throttled. This function can also have
6391 * the side effect of rotating the TXQ in the scheduler rotation, which will
6392 * eventually bring the deficit to positive and allow the station to transmit
6395 * The API ieee80211_txq_may_transmit() also ensures that TXQ list will be
6396 * aligned against driver's own round-robin scheduler list. i.e it rotates
6397 * the TXQ list till it makes the requested node becomes the first entry
6398 * in TXQ list. Thus both the TXQ list and driver's list are in sync. If this
6399 * function returns %true, the driver is expected to schedule packets
6400 * for transmission, and then return the TXQ through ieee80211_return_txq().
6402 * @hw: pointer as obtained from ieee80211_alloc_hw()
6403 * @txq: pointer obtained from station or virtual interface
6405 bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
6406 struct ieee80211_txq *txq);
6409 * ieee80211_txq_get_depth - get pending frame/byte count of given txq
6411 * The values are not guaranteed to be coherent with regard to each other, i.e.
6412 * txq state can change half-way of this function and the caller may end up
6413 * with "new" frame_cnt and "old" byte_cnt or vice-versa.
6415 * @txq: pointer obtained from station or virtual interface
6416 * @frame_cnt: pointer to store frame count
6417 * @byte_cnt: pointer to store byte count
6419 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
6420 unsigned long *frame_cnt,
6421 unsigned long *byte_cnt);
6424 * ieee80211_nan_func_terminated - notify about NAN function termination.
6426 * This function is used to notify mac80211 about NAN function termination.
6427 * Note that this function can't be called from hard irq.
6429 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
6430 * @inst_id: the local instance id
6431 * @reason: termination reason (one of the NL80211_NAN_FUNC_TERM_REASON_*)
6432 * @gfp: allocation flags
6434 void ieee80211_nan_func_terminated(struct ieee80211_vif *vif,
6436 enum nl80211_nan_func_term_reason reason,
6440 * ieee80211_nan_func_match - notify about NAN function match event.
6442 * This function is used to notify mac80211 about NAN function match. The
6443 * cookie inside the match struct will be assigned by mac80211.
6444 * Note that this function can't be called from hard irq.
6446 * @vif: &struct ieee80211_vif pointer from the add_interface callback.
6447 * @match: match event information
6448 * @gfp: allocation flags
6450 void ieee80211_nan_func_match(struct ieee80211_vif *vif,
6451 struct cfg80211_nan_match_params *match,
6455 * ieee80211_calc_rx_airtime - calculate estimated transmission airtime for RX.
6457 * This function calculates the estimated airtime usage of a frame based on the
6458 * rate information in the RX status struct and the frame length.
6460 * @hw: pointer as obtained from ieee80211_alloc_hw()
6461 * @status: &struct ieee80211_rx_status containing the transmission rate
6463 * @len: frame length in bytes
6465 u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
6466 struct ieee80211_rx_status *status,
6470 * ieee80211_calc_tx_airtime - calculate estimated transmission airtime for TX.
6472 * This function calculates the estimated airtime usage of a frame based on the
6473 * rate information in the TX info struct and the frame length.
6475 * @hw: pointer as obtained from ieee80211_alloc_hw()
6476 * @info: &struct ieee80211_tx_info of the frame.
6477 * @len: frame length in bytes
6479 u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
6480 struct ieee80211_tx_info *info,
6483 #endif /* MAC80211_H */